WO2023071612A1

WO2023071612A1 - Frame-suspended permanent magnet direct-drive bogie

Info

Publication number: WO2023071612A1
Application number: PCT/CN2022/119839
Authority: WO
Inventors: 肖遥; 马晓光; 胡定祥; 贾小平; 杨陈; 金鑫
Original assignee: 中车南京浦镇车辆有限公司
Priority date: 2021-10-31
Filing date: 2022-09-20
Publication date: 2023-05-04
Also published as: CN114572266A; CN114572266B

Abstract

The present invention relates to the field of rail vehicles, and in particular to a frame suspended permanent magnet direct-drive bogie, comprising a frame, wheel sets, direct-drive motors, hollow shaft couplings, a single stage rubber stack, air springs, brake cylinders, and a traction pull rod. The frame is of a structure of the Chinese character "日"; the direct-drive motor and the frame are in elastic rubber joint connection; the direct-drive motors drive, by means of the hollow shaft couplings, the wheel sets to rotate; the direct-drive motors use suspension structure design, thereby facilitating small wheelbase design of the bogie; in addition, the motor and the frame are connected using three elastic joints, and the weight of the motors is directly borne by the frame; the brake cylinders use four-joint connection design. The bogie according to the present invention is simple and compact in structure, vehicle operating energy consumption can be reduced by means of the small wheelbase design, the weight of a traction driving device is changed from unsprung weight to sprung weight, the acting force between wheel rails is improved, the brake cylinders are installed on the outer side of the frame, and by means of four-joint connection, the acting positions of a brake shoe and wheel treads meet the braking requirement and eccentric wear will not be caused.

Description

A rack suspension permanent magnet direct drive bogie

technical field

The invention relates to the technical field of rail vehicles, in particular to a suspension type permanent magnet direct drive bogie.

Background technique

As the running unit of the vehicle, the bogie has the functions of bearing, traction, braking, and vibration attenuation. The traditional bogie contains a gearbox, and there is loss in the torque transmission process of the gearbox. The use of the motor to directly drive the axle can avoid this part of the loss. , and usually the motor is a permanent magnet motor. There are usually three types of direct drive bogies. According to the weight of the motor carried on the axle, frame and car body, it is divided into axle-holding type, frame suspension type and body suspension type. The body suspension type is due to engineering And other reasons are not of promotional significance. The shaft-holding type has been used in the operation of rail transit vehicles, but the shaft-holding type has the disadvantages of large unsprung weight and large wheel-rail impact due to the axle directly bearing the weight of the motor, which affects its popularization and application. The goal of this project is to realize the suspension type direct drive bogie. The research on the motion geometric relationship of the suspension type direct drive motor and the design of the suspension structure of the direct drive motor are the key technologies for the design of the suspension type direct drive bogie. At present, the suspension type direct drive The bogie is in the research and development stage and has no mature application yet. How to make better use of the advantages of direct drive and adopt a reasonably matched bogie design structure has become an important technical problem to be solved urgently by those skilled in the art.

Contents of the invention

In order to solve the problem of how to apply the suspension type direct drive bogie to rail vehicles, a suspension type permanent magnet direct drive bogie is proposed.

In order to achieve the above object, the present invention adopts the following technical solutions:

A frame-suspended permanent magnet direct drive bogie, including a frame, a wheel set, a direct drive motor, a hollow shaft coupling, a series of rubber stacks, an air spring, a brake cylinder, and a traction rod;

The frame is a "day" structure, a series of rubber stacks are installed on the lower part of the frame, air springs are installed on the upper part of the frame, brake cylinders are installed on the outside of the rear end of the frame, and traction rods are installed on the middle beam of the "day" structure of the frame;

There is a direct-drive motor in each of the two closed areas of the "Japanese" structure of the frame, and the axial direction of the direct-drive motor is parallel to the middle beam;

The direct drive motor is a frame-suspended direct drive motor, and the direct drive motor is connected to the frame by elastic rubber nodes. The direct drive motor drives the wheel set to rotate through the hollow shaft coupling.

As a further preferred solution, there is an elastic rubber node between the direct drive motor and the middle beam of the frame, and there are two elastic rubber nodes between the direct drive motor and the end beam (front end beam or rear end beam) of the frame. The elastic rubber node includes a pair of mounting seats arranged on the end beam and a node seat installed on the direct drive motor. The mounting seat is a notch with the opening facing upward, and the node seat is a notch with the opening facing downward. A node rod is arranged between the notches, and the mounting base and the node base are jointly clamped on the node rod, the node base is located between the two mounting bases, and the node rod is fixed to the two mounting bases by bolts.

As a further preferred solution, the middle beam of the frame is provided with a center pin for installing the compartment, and each side of the middle beam is provided with a wire rope mounting seat, and the lower part of the wire rope mounting seat is a baffle, and the wire rope mounting seat and the baffle are both U-shaped structure, the notches of the two are set opposite to each other, there is an adjustment pad between the wire rope mounting seat and the baffle plate, the adjustment pad is also U-shaped structure, and is arranged in the same direction as the baffle plate, and there is a fixing pad running through the wire rope mounting seat and the adjustment pad. The combination of bolts and nuts of the baffle; a wire rope is provided on both sides of the center pin, and the end of the wire rope is a wire rope stop ring. The diameter of the wire rope stop ring is larger than the maximum diameter of the notch of the baffle. Notches for pads, baffles.

As a further preferred solution, the direct drive motor includes a permanent magnet direct drive motor, a motor side flange, a hollow shaft, an axle side connection plate, a hub plate, and an axle;

The inner cavity of the permanent magnet direct drive motor is tapered, and the flange on the motor side and the connecting plate on the axle side are respectively located at both ends of the permanent magnet direct drive motor;

The side of the permanent magnet direct drive motor close to the motor side flange has active end face teeth for driving the rotation of the motor side flange, and the side of the motor side flange has driven end face teeth meshing with the active end face teeth;

The hollow shaft is located in the permanent magnet direct drive motor. The inner cavity of the hollow shaft is tapered, and its taper direction is opposite to that of the permanent magnet direct drive motor. Between the hollow shaft and the inner cavity of the permanent magnet direct drive motor There is a gap between;

The two ends of the hollow shaft are respectively connected to the flange on the motor side and the connection plate on the axle side through gear meshing. The hollow shaft is located on the side of the flange on the motor side and is provided with a first flange. A flexible sheet is installed between the disks;

The hub disc and the axle are interference fit, the axle is located in the hollow shaft, and there is a gap between the axle and the inner cavity of the hollow shaft;

There is a second flange on the hub disc, and a flexible sheet is also installed between the second flange and the connecting disc on the axle side.

As a further preferred solution, a brake cylinder is respectively provided on both sides of the frame end beam of the frame, and four installation positions are arranged on the frame end beam, and the four installation positions are arranged in a square shape for fixed installation of the brake cylinder.

As a further preferred solution, the four installation positions are that interface 1, interface 2, and interface 3 are opened from top to bottom on the frame end beam, and interface 4 is opened from bottom to top, wherein interface 1 and interface 2 are close to the side of the frame. Beam, interface three is close to the wheel set position;

One of the interfaces is provided with a brake bushing, and a bolt for connecting the bolt on the brake cylinder is installed through the brake bushing. The interface two bolts of the hole, the interface three is a through hole opened at the lower cover plate of the end beam of the frame end beam, the through hole passing through the interface three and the through hole on the brake cylinder are installed with the interface three bolts for connecting the screw hole on the brake cylinder , NL washers and slotted nuts are installed at the end of the interface three bolts for fixing, interface four is a threaded hole on the lower cover plate of the end beam of the frame end beam, and an interface is provided through the through hole on the brake cylinder and the threaded hole of interface four Four bolts.

The brake cylinder is located at the bottom of the frame end beam, and the bottom of the frame end beam is provided with a stop surface for limiting the brake cylinder.

Compared with the existing technical solutions, the present invention realizes the suspension structure design of the direct drive motor, which is beneficial to the design of the small wheelbase of the bogie, the structure of the bogie is simple and compact, the passing ability of the small curve of the vehicle is improved and the energy consumption of the vehicle operation is reduced, and , the installation scheme of elastically suspending the permanent magnet direct drive traction drive on the frame solves the problem of the motor torque transmission scheme when the permanent magnet direct drive traction drive is elastically suspended, and the weight of the traction drive is changed from unsprung weight to sprung weight, improving the force between the wheel and rail.

Description of drawings

Fig. 1 is the structural representation of bogie of the present invention;

Figure 2 is a bottom view of the direct drive motor installed on the frame;

Fig. 3 is the structural representation of elastic rubber node;

Figure 4 is a schematic diagram of the installation structure of the central pin;

Figure 5 is a schematic diagram of the internal structure of the direct drive motor;

Fig. 6 is a schematic diagram of the hollow shaft structure;

Fig. 7 is a schematic diagram of vehicle form state;

Figure 8 is a schematic diagram of the installation position of the brake cylinder;

Fig. 9 is a schematic diagram of the positions of interface one, interface two and interface three;

Fig. 10 is a schematic diagram of the position of interface four;

Figure 11 is an exploded view of the installation position of the brake cylinder;

Figure 12 is a side view of the installation position of the brake cylinder;

Figure 13 is a perspective view of the installation position of the brake cylinder;

Fig. 14 is a schematic diagram of the structure of the stop surface.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention.

A frame suspension permanent magnet direct drive bogie of the present invention comprises a frame 1, a wheel set 2, a direct drive motor 3, a hollow shaft coupling 4, a series of rubber piles 5, an air spring 6, and a brake cylinder 7 , traction rod 8;

The frame 1 is a "day" structure, a series of rubber stacks 5 are installed on the lower part of the frame 1, air springs 6 are installed on the upper part of the frame 1, brake cylinders 7 are installed on the outside of the rear end of the frame 1, and traction rods 8 are installed on the " On the middle beam of the "日" character structure;

A direct drive motor 3 is provided in each of the two closed areas of the "日" character structure of the frame 1, and the direct drive motor 3 is axially parallel to the middle beam;

The direct drive motor 3 is a suspension type direct drive motor, and the direct drive motor 3 is connected to the frame 1 by an elastic rubber node, and the direct drive motor 3 drives the wheel pair 2 to rotate through the hollow shaft coupling 4 .

The installation of the direct-drive motor 3 with a suspended structure allows the wheelbase of the frame 1 to range from 1.6m to 1.9m, which meets the requirement of a small wheelbase. For the frame 1 with a small wheelbase, the minimum curve radius is 100-150m. Compared with the traditional wheelbase of 2.3m to 2.5m, the smaller the radius of the curve, the more flexible the line planning, and the lower the demolition cost involved in line construction. At the same time, this solution has better passing performance in conventional curves, which can reduce wheel-rail wear and noise when passing curves.

The bearing function of the frame 1: the weight transmission path of the car body is transmitted to the wheel set 2 through the air spring 6, the frame 1, and a series of rubber piles 5 in sequence.

When the direct drive motor is used, the mass is relatively large. The optimal way for the motor suspension is to share the load on both sides and carry the load evenly. The overall end beam structure can ensure sufficient strength and reduce the distance between the frame (end beam) and the motor. It is beneficial to reduce the size of the connection transition piece, thereby improving reliability. With the use of integral end beams, the frame forms a Japanese-shaped closure, which improves the integrity of the frame and can effectively improve the strength of the end beams; local forgings are added to the connection between the end beams and side beams to improve structural strength.

Embodiment one

There is an elastic rubber node between the direct drive motor 3 and the middle beam of the frame 1, there are two elastic rubber nodes between the direct drive motor 3 and the end beam of the frame 1, and a three-point elastic joint is used between the direct drive motor 3 and the frame 1 The nodes are connected, and it is designed as a suspension structure, and the weight of the motor is directly borne by the frame.

Specifically, the elastic rubber node includes a pair of mounting seats 91 arranged on the end beam and a node seat 92 installed on the direct drive motor 3, the mounting seat 91 is a notch with the opening facing upward, and the node seat 92 is opening downward The notch of the two mounting bases 91 is provided with a node rod 93, the mounting base 91 and the node base 92 are jointly stuck on the node rod 93, the node base 92 is located between the two mounting bases 91, and the node rod 93 It is fixed to two mounting bases 91 by bolts, and an anti-slip plate 94 is arranged between a pair of mounting bases 91. The nodes are installed on the frame from bottom to top. When designing, the center of gravity of the permanent magnet direct drive motor should be located at the center of three points as much as possible so that The three hanging points are in good stress condition under extreme working conditions; the anti-drop plate structure is designed to prevent the traction drive device from falling down due to broken bolts; the overall weight of the traction drive device is sprung weight, which is conducive to improving wheel load track relationship.

The motor adopts three-point suspension, and the height of the node is consistent with the center of gravity of the motor, so as to realize the uniform force of the node and balance the moment; the three-point suspension of the motor reduces the cost compared with the four-point suspension, and at the same time facilitates the design of the frame beam; the two-point suspension outside the motor The horizontal span of the machine is short, and the rolling moment acting on the motor and reacting on the end beam is small, so that the deformation and displacement of the elastic flexure of the motor is small, which plays a good role in the strength of the end beam of the frame; the three-point arm of the motor Long and short, the additional torque of the motor nodding is small, and at the same time, the bending moment reacted on the frame is reduced, which is convenient for the design of the frame strength.

Embodiment two

The middle beam of the frame 1 is provided with a center pin 101 for installing the compartment, and a steel wire rope mounting seat 102 is respectively provided on both sides of the middle beam, and the lower part of the steel wire rope mounting seat 102 is a baffle plate 103, and the steel wire rope mounting seat 102 and the baffle plate 103 are both U-shaped structure, the notches of the two are arranged oppositely, there is an adjustment pad 104 between the wire rope mounting seat 102 and the baffle plate 103, the adjustment pad 104 is also a U-shaped structure, and is arranged in the same direction as the baffle plate 103, and runs through the wire rope mounting seat 102 and adjusting pad 104 are provided with a combination of bolts and nuts for fixing baffle plate 103; both sides of center pin 101 are respectively provided with a steel wire rope 105, and the end of steel wire rope 105 is a steel wire rope stop ring 106, and the diameter of steel wire rope stop ring 106 is larger than baffle plate 103 The maximum diameter of the notch, the steel rope 105 passes through the notches of the steel rope mounting seat 102, the adjustment pad 104, the baffle plate 103, and the steel rope 105 and the central pin 101 are hinged by the round pin 107.

The wire rope in this embodiment is light in weight, and the center pin 101 is hoisted on both sides with balanced forces, so that the empty spring anti-overcharge function and the truck-mounted hoisting function are realized.

The adjustment pad 104 can adjust the distance between the steel wire rope between the center pin and the mounting seat, so as to achieve height adjustment.

Embodiment Three

The suspension type permanent magnet direct drive bogie traction drive device applied on the small wheelbase frame 1, that is, the direct drive motor 3 of the present invention, includes a permanent magnet direct drive motor 31, a motor side flange 32, and a hollow shaft 33 , axle side connecting disc 34, wheel hub disc 35, axle shaft 36; present embodiment proposes the installation scheme that the permanent magnet direct drive traction drive device is elastically suspended on the frame, and solves the problem of motor torque when the permanent magnet direct drive traction drive device is elastically suspended Issues with delivery schemes.

The inner cavity of the permanent magnet direct drive motor 31 is tapered, and the motor side flange 32 and the axle side connection plate 34 are respectively located at both ends of the permanent magnet direct drive motor 31 ;

The side of the permanent magnet direct drive motor 31 close to the motor side flange 32 has active end face teeth for driving the motor side flange 32 to rotate, and the side of the motor side flange 32 has a driven end face meshing with the active end face teeth tooth;

The hollow shaft 33 is located in the permanent magnet direct drive motor 31. The inner cavity of the hollow shaft 33 is tapered, and its taper direction is opposite to that of the inner cavity of the permanent magnet direct drive motor 31. The hollow shaft 33 and the permanent magnet direct drive There is a gap between the inner cavities of the motor 31, which is a space reserved for component deformation;

Both ends of the hollow shaft 33 are respectively connected to the motor side flange 32 and the axle side connection plate 34 through gear meshing. The hollow shaft 33 is located on the side of the motor side flange 32 and is also provided with a first flange 38. The first method A flexible sheet 37 is installed between the flange and the motor side flange 32;

The hub disc 35 and the axle shaft 36 are interference fit, the axle shaft 36 is located in the hollow shaft 33, and there is a gap between the axle shaft 36 and the inner cavity of the hollow shaft 33, which is a space reserved for component deformation;

There is a second flange 39 on the hub disk 35 , and a flexible piece 37 is installed between the second flange and the axle-side connecting disk 34 .

Wherein, the motor side flange 32 is relatively connected and fixed with the first flange 38 through the flexible piece 37, and the axle side connection plate 34 is also relatively connected and fixed with the second flange 39 through the flexible piece 37. The motor side flange 32 and the axle side connection plate 34 are relatively fixed to both ends of the hollow shaft 33 by bolts;

The permanent magnet direct drive motor 31 drives the driven end teeth of the motor side flange 32 through the active end teeth, and drives the motor side flange 32-first flange 38-hollow shaft 33-axle side connection plate 34-second method Lan 39-hub disc 35-axle 36 rotates as a whole.

The flexible plate type hollow shaft coupling adopts a purely mechanical design as a whole, with a compact structure, no rubber parts, and maintenance-free; since the permanent magnet direct drive motor is fully suspended and connected to the frame, the permanent magnet direct drive motor will move relative to the axle when the vehicle is running. Generate relative motion, which is absorbed by the deformation of the flexible sheet, and through the deformation of the flexible sheet, the coupling can adapt to the displacement requirements of the wheel set relative to the motor under dynamic and static conditions; in addition, the coupling The overall design of the joint can save axial space better, and the torque transmission capacity is stronger. Since the internal parts are all connected by bolts and the form of end-face tooth meshing, the assembly process is better.

As shown in the figure, the default frame does not move. Since the permanent magnet direct drive motor is suspended and connected to the frame, the permanent magnet direct drive motor is the same as the frame by default. For the jumping state, see the left figure of attached drawing 6), the interference press fit and the hub disc on this side jump radially accordingly, causing the hub disc and the hollow shaft to tilt (at this time, the flexural deformation is deformed to ensure the internal parts of the coupling Tilting), when the wheel at the motor drive end runs radially (that is, at the end of Figure 5B, see the right figure of Figure 6 for the jumping state), the axle on this side is tilted up; according to the movement of the axle and the hollow shaft of the coupling during the operation of the vehicle Analysis (accompanying drawing 3), so the inner wall of the rotor of the permanent magnet direct drive motor and the hollow shaft of the coupling are designed in the shape of a bell mouth, and the inner wall of the rotor, the hollow shaft and the axle form a "zigzag" structure, as shown in the accompanying drawing 2 The gaps a and b on both sides need to meet the maximum displacement of the wheel axle relative to the frame when the wheel runs out radially during vehicle operation.

Embodiment Four

The basic braking unit of the bogie is mainly installed on the frame, and the friction between the brake shoe and the wheel tread generates a force that hinders the train from moving forward. In order to achieve the braking effect under the extreme position of wheel wear, brake shoe wear and a series of displacements, the push rod of the brake unit must meet a certain stroke, so the volume of the brake cylinder and the movable space of the boom must be relatively large. big.

At present, the tread brake of urban rail vehicles adopts the transition plate suspension method, which is connected and suspended between the frame beam and the wheel through the opening bolts of the frame side beam. When the wheel diameter is fixed, it takes up a lot of wheelbase space and limits The size of the wheelbase, and the large wheelbase makes the bogie's ability to pass small curves poor, which will also greatly increase the design and manufacturing costs of subway vehicles.

The traditional three-point installation position is on the side of the brake cylinder, and the suspension of the brake unit is a shear force, plus the shear force when the brake is applied, and the stress condition of the bolts is even worse. The new brake cylinder installation method adopts The four-point suspension around the center of gravity is limited by the internal structure of the brake unit. The four-point arrangement is compact and symmetrically distributed as a whole, and the force is uniform. The gravity direction of the brake cylinder is supported by the tension of the bolts, and it is only sheared when the brake is applied. force.

In response to the current demand for small wheelbase bogies, this embodiment provides a brake cylinder installation method that can be adapted to the end suspension, adding two end beams on both sides and drilling four holes on the end beams to meet the working stroke of the brake cylinder and The brake is normally applied, and the brake cylinder is not installed between the beam and the wheel set, which greatly liberates the space inside the frame.

A brake cylinder 7 is respectively provided on both sides of the frame end beam 712 of the frame 1, and four installation positions are arranged on the frame end beam 712, and the four installation positions are arranged in a square shape for fixing the brake cylinder 7, braking The unit is traditionally installed on the inner side of the frame, which takes up more space in the wheelbase. The new installation method adopts end suspension, which is suitable for installation of brake cylinders on bogies with large and small wheelbases, and also applies braking force.

Specifically, the four installation positions are that interface one 71, interface two 72, and interface three 73 are opened from top to bottom on the frame end beam 712, and interface four 74 is opened from bottom to top, wherein interface one 71 and interface two 72 Close to the side beam of the frame 1, the interface 3 73 is close to the position of the wheel set 2;

A brake bushing 714 is provided at the interface 71, and an interface bolt 78 for connecting the screw hole on the brake cylinder 7 is installed through the brake bushing 714. The brake bushing 714 is used for guiding the bolt connection from top to bottom. and protection;

The second interface 72 is provided with a sleeve 75, and the second interface bolt 76 for connecting the screw hole on the brake cylinder 7 is installed through the sleeve 75;

The interface three 73 is a through hole provided at the end beam lower cover plate 713 of the frame end beam 712, and the through hole passing through the interface three 73 and the upper through hole of the brake cylinder 7 are installed with interface three bolts for connecting the upper screw holes of the brake cylinder 7 77, NL washers 79 and slotted nuts 710 are installed at the ends of the interface three bolts 77 for fixing;

The interface four 74 is provided with threaded holes at the end beam lower cover plate 713 of the frame end beam 712, and the threaded holes running through the upper through hole of the brake cylinder 7 and the interface four 74 are provided with interface four bolts 711.

The brake cylinder 7 is located at the bottom of the frame end beam 712, and the bottom of the frame end beam 712 is provided with a stop surface 717 for limiting the brake cylinder 7, which has a certain positioning effect on the installation and can also reduce the force on the bolt when the brake is applied. The shearing force ensures the safety and stability of the action.

After installation, the action position of the brake shoe 716 and the tread surface of the wheel 715 meets the braking requirements and will not be eccentrically worn. The brake unit is hung on the outside for easy maintenance and disassembly. It is easy to replace the brake shoe. Manual release does not need to be equipped with a remote pull rope, and the pipeline layout occupies a large area. The space is scattered, which is conducive to the design and installation of other pendants.

This installation method must first meet the interface conditions of the end suspension. The brake cylinder needs to be connected by at least M20 bolts, and the bolt strength must reach 12.9. According to the specific interface, design blind holes, through holes and threaded holes. When the strength meets It can be designed as an integral end beam type or a cantilever structure under the premise. The upper surface of the brake unit, that is, the contact surface, needs to be provided with a boss to prevent seizure. Partial weight reduction can be considered on the non-matching surface, and a round hole is designed for weight reduction. 718 When installing, it is necessary to design the corresponding tooling to lift the brake cylinder, design the stop structure in the direction of the braking force, and finally provide enough space for the frictional contact between the wheel and the brake shoe.

Installing the brake cylinder at the end simplifies the arrangement of the air intake pipeline, occupies less space on the upper frame and the outer side of the side beam, and can also cancel the design of the hand release rope, which is convenient for daily inspection of the brake unit and brake during maintenance. The tiles can be removed, and the brake cylinder can be removed without starting the car.

The above is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto, any person familiar with the technical field within the technical scope disclosed in the present invention, according to the technical solution of the present invention Any equivalent replacement or change of the inventive concepts thereof shall fall within the protection scope of the present invention.

Claims

A suspension type permanent magnet direct drive bogie is characterized in that it includes a frame (1), a wheel set (2), a direct drive motor (3), a hollow shaft coupling (4), a series of rubber piles ( 5), air spring (6), brake cylinder (7), traction rod (8);

The frame (1) is a "day" structure, a series of rubber piles (5) are installed on the lower part of the frame (1), the air spring (6) is installed on the upper part of the frame (1), and the brake cylinder (7) is installed on the frame (1) ) outside the rear end, the traction rod (8) is installed on the middle beam of the "day" character structure of the frame (1);

A direct drive motor (3) is arranged in each of the two closed areas of the "day" character structure of the frame (1), and the direct drive motor (3) is axially parallel to the middle beam;

The direct drive motor (3) is a suspension type direct drive motor, the direct drive motor (3) is connected to the frame (1) by an elastic rubber node, and the direct drive motor (3) is driven by a hollow shaft coupling (4) The wheelset (2) rotates.
A suspension type permanent magnet direct drive bogie according to claim 1, characterized in that: there is an elastic rubber node between the direct drive motor (3) and the middle beam of the frame (1), and the direct drive motor There are two elastic rubber nodes between (3) and the end beam of the frame (1), and the elastic rubber nodes include a pair of mounts (91) arranged on the end beam and a Node seat (92), mounting seat (91) is the notch that opening faces upwards, and node seat (92) is the notch that opening faces downward, is provided with node bar (93) between the notch of two mounting seats (91) ), the mounting base (91) and the node base (92) are jointly clamped on the node rod (93), the node base (92) is located between the two mounting bases (91), and the node rod (93) is fixed to the two mount (91).
A rack-suspended permanent magnet direct-drive bogie according to claim 1, characterized in that: a center pin (101) for installing the carriage is provided on the middle beam of the frame (1), and the two sides of the middle beam Each is provided with a steel wire rope mounting seat (102), and the lower part of the steel wire rope mounting seat (102) is a baffle plate (103). , there is an adjustment pad (104) between the wire rope mounting seat (102) and the baffle plate (103), the adjustment pad (104) is also a U-shaped structure, and is arranged in the same direction as the baffle plate (103), and runs through the wire rope mounting seat (102 ) and the adjusting pad (104) are provided with a combination of bolts and nuts for fixing the baffle (103); a steel wire rope (105) is respectively provided on both sides of the center pin (101), and the end of the steel wire rope (105) is a wire rope stop ring ( 106), the diameter of the wire rope stop ring (106) is greater than the maximum diameter of the notch of the baffle (103), and the wire rope (105) passes through the notch of the wire rope mounting seat (102), the adjustment pad (104), and the baffle (103) .
A suspension type permanent magnet direct drive bogie according to claim 1, characterized in that: the direct drive motor (3) comprises a permanent magnet direct drive motor (31), a motor side flange (32), Hollow shaft (33), axle side connecting disc (34), hub disc (35), axle shaft (36);

The inner cavity of the permanent magnet direct drive motor (31) is tapered, and the motor side flange (32) and the axle side connection plate (34) are respectively located at the two ends of the permanent magnet direct drive motor (31);

The permanent magnet direct drive motor (31) has active end face teeth for driving the motor side flange (32) to rotate near the motor side flange (32), and the side of the motor side flange (32) has active end face teeth. driven face teeth meshing between the teeth;

The hollow shaft (33) is located in the permanent magnet direct drive motor (31), and the inner cavity of the hollow shaft (33) is tapered, and its taper direction is opposite to that of the permanent magnet direct drive motor (31). There is a gap between the hollow shaft (33) and the inner cavity of the permanent magnet direct drive motor (31);

The two ends of the hollow shaft (33) are respectively connected with the motor side flange (32) and the axle side connection plate (34) through gear engagement, and the hollow shaft (33) is located on the side of the motor side flange (32). A flange, a flexible sheet (37) is installed between the first flange and the motor side flange (32);

The wheel hub (35) and the axle (36) are interference fit, the axle (36) is located in the hollow shaft (33), and there is a gap between the axle (36) and the inner cavity of the hollow shaft (33);

There is a second flange on the hub disc (35), and a flexible sheet (37) is also installed between the second flange and the axle-side connection disc (34).
A suspension-type permanent magnet direct-drive bogie according to claim 1, characterized in that: a brake cylinder (7) is respectively provided on both sides of the frame end beam (712) of the frame (1), Four installation positions are arranged on the frame end beam (712), and the four installation positions are arranged in a square shape, and are used for fixedly installing the brake cylinder (7).
A rack-suspended permanent magnet direct-drive bogie according to claim 5, characterized in that: the four installation positions are that interface one (71) and interface two ( 72), interface three (73), with interface four (74) from bottom to top, wherein interface one (71) and interface two (72) are close to the side beam of the frame (1), and interface three (73) is close to the wheel set (2) location;

A brake bushing (714) is provided at the interface one (71), and the interface one bolt (78) for connecting the screw hole on the brake cylinder (7) is installed through the brake bushing (714), and the interface two (72) There is a sleeve (75) at the place, through the sleeve (75) is installed the interface two bolts (76) used to connect the screw holes on the brake cylinder (7), and the interface three (73) is the end of the frame end beam (712). A through hole is provided at the lower cover plate (713) of the beam, and the through hole passing through the interface three (73) and the upper through hole of the brake cylinder (7) are installed with the interface three bolts (77 ), the end of interface three bolts (77) is fixed with NL washers (79) and slotted nuts (710), and interface four (74) is the end beam lower cover plate (713) of the frame end beam (712). The threaded hole runs through the brake cylinder (7) upper through hole and the threaded hole of the interface four (74) to be provided with interface four bolts (711).
The rack-suspended permanent magnet direct-drive bogie according to claim 6, characterized in that: the brake cylinder (7) is located at the bottom of the frame end beam (712), and the bottom of the frame end beam (712) is provided with a The stop surface (717) of the brake cylinder (7).