CN114368406B

CN114368406B - Triaxial electric drive bogie and rail vehicle

Info

Publication number: CN114368406B
Application number: CN202210086444.6A
Authority: CN
Inventors: 肖少坤; 姜永辉; 唐鹏; 陶亮; 于欢
Original assignee: CRCC High Tech Equipment Corp Ltd
Current assignee: CRCC High Tech Equipment Corp Ltd
Priority date: 2022-01-25
Filing date: 2022-01-25
Publication date: 2024-09-20
Anticipated expiration: 2042-01-25
Also published as: CN114368406A

Abstract

The embodiment of the application provides a three-axis electric drive bogie and a railway vehicle, wherein the bogie comprises: the framework comprises two parallel side beams and two cross beams connected between the side beams, wherein the two cross beams are parallel and distributed at intervals; the space between the two side beams is divided into three installation spaces by the two cross beams; three sets of wheel pairs; the group of wheels are positioned in one installation space; the wheel set includes: the axle box is positioned below the side beams; a suspension device arranged between the axle box and the side beam; the secondary suspension device is arranged in the middle of the side beam; the traction device is arranged below the side beam and is used for being connected with the vehicle body; the traction device spans the two side beams and extends to the outer sides of the side beams, and the traction device performs traction in a horizontal plane. The application adopts a double-beam H-shaped framework, which cancels an end beam structure and lightens the weight of the bogie.

Description

Triaxial electric drive bogie and rail vehicle

Technical Field

The application relates to a vehicle running technology, in particular to a three-shaft electric drive bogie and a railway vehicle.

Background

Three-axle bogies are commonly used for heavy-duty traction electric locomotives (i.e., locomotives) of freight and passenger vehicles, such as Harmonious series locomotives and the like. The existing three-axle bogie is mainly manufactured by heavy load and traction rolling stock, the axle weight is more than 23t or 25t, and the new wheel diameter is 1250mm for increasing the use mileage of wheels; because the vehicle is heavy-duty and traction, the driving unit has high power and the driving system has high weight, the weight of the bogie is close to 30t. The existing triaxial bogie technology can not be applied to road maintenance machinery vehicles in conventional subways, high-speed rails, inter-city railways and other lines.

At present, a large road maintenance mechanical vehicle mainly adopts a two-axle bogie, and because of the limitation of the existing line on the axle weight, the large road maintenance mechanical vehicle has to be in a form of marshalling due to factors such as the weight of a traction system, a working device and the like, and the requirement of the line on the axle weight is met by increasing the number of vehicle nodes and increasing the number of the two-axle bogies so as to realize the weight distribution. And the primary suspension in the traditional bogie adopts a single-pull-rod type axle box positioning double-steel spring structure, the longitudinal arrangement space of the primary suspension is larger, and the curve passing performance of the bogie is lower.

Disclosure of Invention

In order to solve one of the technical defects, the embodiment of the application provides a three-shaft electric drive bogie and a railway vehicle.

According to an embodiment of the first aspect of the present application, there is provided a three-axle electric drive bogie comprising:

The framework comprises two parallel side beams and two cross beams connected between the side beams, wherein the two cross beams are parallel and distributed at intervals; the space between the two side beams is divided into three installation spaces by the two cross beams;

three sets of wheel pairs; the group of wheels are positioned in one installation space; the wheel set includes: the axle box is positioned below the side beams;

a suspension device arranged between the axle box and the side beam;

The secondary suspension device is arranged in the middle of the side beam;

the traction device is arranged below the side beam and is used for being connected with the vehicle body; the traction device spans the two side beams and extends to the outer sides of the side beams, and the traction device performs traction in a horizontal plane.

According to a second aspect of the present application there is provided a railway vehicle comprising a three-axle electrically driven bogie as described above.

The three-axle electric drive bogie provided by the embodiment of the application adopts the double-beam H-shaped framework, the end beam structure is omitted, the weight of the bogie is reduced, the traction device adopts a double-side flat pull rod form, spans the bottom of the framework and is arranged below a side beam of the framework, the height of a traction point of a vehicle is reduced, the adhesion utilization rate of the vehicle is conveniently improved, the primary suspension adopts a double-spring guide post type structure, the arrangement of axle box pull rods is reduced, the axle distance and the framework length of the bogie are shortened, the weight of the framework is reduced, and the bogie is more compact.

Drawings

The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the application and do not constitute a limitation on the application. In the drawings:

fig. 1 is a schematic structural view of a bogie according to an embodiment of the present application;

FIG. 2 is a schematic structural diagram of a framework according to an embodiment of the present application;

fig. 3 is a schematic structural diagram of a wheel set according to an embodiment of the present application;

FIG. 4 is a schematic diagram of a primary suspension device according to an embodiment of the present application;

FIG. 5 is a schematic view of a frame with a traction device according to an embodiment of the present application;

fig. 6 is a schematic structural diagram of a driving device according to an embodiment of the present application.

Reference numerals in the drawings: 1. a frame; 11. a cross beam; 12. a side beam; 13. a motor mounting seat; 14. a gear box hanging seat; 15. a secondary spring mounting base; 16. a brake mount; 17. a frame hanging seat; 18. a series of hanging mounting seats; 19. a transverse shock absorber mounting base; 110. a traction device mounting base; 111. a transverse stop mounting seat; 112. a vertical shock absorber mounting base; 2. a driving device; 21. a traction motor; 22. a coupling; 23. a gear box; 24. a gear boom; 3. a wheel set; 31. a wheel; 32. an axle; 33. an axle box; 4. a series of suspension devices; 41. a steel spring assembly; 42. a composite rubber guide post; 44. a vertical vibration damper; 5. a secondary suspension device; 51. a rubber cone; 52. a transverse damper; 53. a lateral stop; 6. a traction device; 61. a balance bar; 62. a crank arm; 63. a pull rod; 7. a foundation brake device.

Detailed Description

In order to make the technical solutions and advantages of the embodiments of the present application more apparent, the following detailed description of exemplary embodiments of the present application is provided in conjunction with the accompanying drawings, and it is apparent that the described embodiments are only some embodiments of the present application and not exhaustive of all embodiments. It should be noted that, without conflict, the embodiments of the present application and features of the embodiments may be combined with each other.

The embodiment of the application provides a triaxial electric drive bogie which can be used in a railway vehicle. The rail vehicle can be a large road maintenance mechanical vehicle, can also be a conventional subway, a high-speed rail, an inter-city railway and a freight vehicle, and is particularly applied to a head car.

In this embodiment, the longitudinal direction of the bogie (i.e., the longitudinal direction of the vehicle) is referred to as the longitudinal direction, the width direction of the bogie is referred to as the lateral direction, and the height direction of the bogie is referred to as the vertical direction or the vertical direction.

Fig. 1 is a schematic structural view of a bogie according to an embodiment of the present application, fig. 2 is a schematic structural view of a frame according to an embodiment of the present application, fig. 3 is a schematic structural view of a wheel set according to an embodiment of the present application, fig. 4 is a schematic structural view of a primary suspension device according to an embodiment of the present application, fig. 5 is a schematic structural view of a traction device disposed on the frame according to an embodiment of the present application, and fig. 6 is a schematic structural view of a driving device according to an embodiment of the present application.

As shown in fig. 1 to 6, the bogie provided by the present embodiment includes: the device comprises a framework 1, a wheel set 3, a primary suspension device 4, a secondary suspension device 5, a traction device 6, a foundation braking device 7 and other components.

The frame 1 comprises two parallel side beams 11 and two cross beams 12 connected between the side beams 11, wherein the two cross beams 12 are arranged in parallel and at intervals. The two cross members 12 divide the space between the two side members 11 into three installation spaces. The side beams 11 and the cross beams 12 may be box-shaped structures, and the two side beams 11 and the two cross beams 12 are welded to form an "H" shaped frame.

The number of the wheel sets 3 is three, and one group of the wheel sets 3 is positioned in one installation space. The wheel set 3 includes: the axle 32, wheels 31 symmetrically arranged on the axle 32, and axle boxes 33, the axle boxes 33 being located below the side members 11.

The primary suspension device 4 is disposed between the axle housing 33 and the side member 11. The secondary suspension 5 is provided in the middle of the side member 11. The traction device 6 is arranged below the side beams 11 and is connected to the vehicle body for transmitting longitudinal forces between the bogie and the vehicle body, including traction forces and braking forces.

According to the technical scheme provided by the embodiment, the two side beams and the two cross beams are connected to form the H-shaped framework, and compared with the traditional 'mu' -shaped framework, the 'H' -shaped framework provided by the application has no end beam, so that the dead weight of the bogie is reduced.

The cross beam 12 adopts a fish belly type concave structure, and is provided with a motor mounting seat 13 for mounting a traction motor, a gear box hanging seat 14 for mounting a gear box and a brake mounting seat 16 for mounting a basic brake device.

The side beam 11 is provided with a secondary spring mount 15 for mounting a secondary suspension, a frame hanger 17 for connection to a hoisting device, a primary suspension mount 18 for mounting a primary suspension, a lateral shock absorber mount 19 for mounting a lateral shock absorber 52, a traction device mount 110 for mounting a traction device, a lateral stop mount 111 for mounting a lateral stop, and a vertical shock absorber mount 112 for mounting a vertical shock absorber 44.

In the wheel set 3, the wheels 31 and the axles 32 are fixedly connected through a press-fitting process, the axle boxes 33 comprise box bodies and bearings arranged in the box bodies, and the bearings are press-fitted between the axles 32 and the box bodies. The box body is a casting piece, adopts a teeterboard structure and provides an interface for a primary suspension device.

The primary suspension device 4 includes: two sets of steel spring assemblies 41 and vertical dampers 44. Wherein two sets of steel spring assemblies 41 are disposed between the axle housing 33 and the side sill 11. The two sets of steel spring assemblies 41 are arranged in sequence in a longitudinal direction parallel to the side members 11.

Specifically, the steel spring assembly 41 includes an outer ring steel spring, an inner ring steel spring, and a guide post. The elastic deformation direction of the outer ring steel spring assembly extends vertically. The elastic deformation direction of the inner ring steel spring extends vertically, the inner ring steel spring is positioned in the outer ring steel spring, and the spiral direction of the inner ring steel spring is opposite to the spiral direction of the outer ring steel spring. The guide post may be a composite rubber guide post 42, whose top end is connected with the side beam 11, and whose bottom end is inserted into the inner ring steel spring and is matched with the axle box 33 in a positioning way. The composite rubber guide post 42 can satisfy vibration reduction in the vertical and horizontal directions. The primary suspension adopts a double-spring guide pillar type structure, so that the arrangement of axle box pull rods is reduced, the axle distance and the length of a bogie are shortened, the weight of the bogie is reduced, and meanwhile, the bogie is more compact.

The vertical damper 44 extends in the vertical direction and is connected between the axle housing 33 and the side member 11, and the vertical damper 44 is located between the two sets of steel spring assemblies 41. Specifically, the top end of the vertical damper 44 is connected to the side member 11 by a fastener such as a bolt, and the bottom end is connected to the lower portion of the axle box 33 by a fastener such as a bolt.

In the conventional solution, a tie rod extending in the longitudinal direction is connected between the axle box and the frame, so that the distance between the wheel pairs is large, i.e. the wheelbase of the bogie is large. The bogie provided by the embodiment does not use a pull rod structure, so that the wheelbase of the bogie can be reduced, the longitudinal size of the bogie is reduced, the structure is more compact, the safety space is reserved for equipment at the lower part of the vehicle or the distance between the vehicle is reduced, obvious improvement is brought, and the performance of the bogie through curves can be improved.

In this embodiment, the traction device 6 is located between two wheel pairs. The traction device 6 is provided below the side members 11 for connection to the vehicle body, the traction device 6 straddles the two side members 11 and extends to the outside of the side members 11, and the traction device 6 performs traction in a horizontal plane. For example: the traction device 6 adopts a double-side flat pull rod structure, spans the bottom of the framework 1, is arranged below the side beams 12, reduces the height of a vehicle traction point, and is convenient for improving the vehicle adhesion utilization rate.

Specifically, the traction device 6 includes: balance bar 61, crank arm 62 and pull rod 63. The crank arms 62 are rotatably arranged on the lower surfaces of the side beams 11, and the crank arms 62 are correspondingly arranged on the two side beams 11. The balance bar 61 extends in the lateral direction, and both ends of the balance bar 61 are respectively rotatably connected with the crank arms 62 on the two side members 11. The tie rod 63 extends in the longitudinal direction, and has one end rotatably connected to the crank arm 62 and the other end for connection to the vehicle body. The crank arm 62, the balance bar 61 and the pull bar 63 move relatively in the same horizontal plane.

In the traditional scheme, the traction device extends along the vertical direction, the top of the traction device is connected with the vehicle body, and the bottom of the traction device is matched with the framework, so that the height of a traction point of the vehicle is higher. In this embodiment, the crank arm 62, the balance rod 61 and the pull rod 63 relatively move in the same horizontal plane, so that the longitudinal force is transferred between the crank arm 62, the balance rod 61 and the pull rod 63 and the vehicle body, the height of the traction point is reduced, the height of the vehicle body can be reduced, the gravity center of the vehicle is further reduced, the adhesion utilization rate of the vehicle is improved, and the safety and the stability are further improved. In addition, the traction device has a simple structure, reduces a plurality of parts and oiling and press-fitting procedures, and reduces the manufacturing cost.

One specific implementation mode: the crank arm 62 includes two link portions perpendicular to each other and having an L-shape, and the joint between the two link portions is rotatably connected to the side member 11 by a connecting pin. The end of one link portion is connected to the balance bar 61 by a connecting pin, and the end of the other link portion is connected to the tie bar 63 by a connecting pin.

Furthermore, the bogie can be used as a non-power bogie if a driving device is not arranged in the bogie; if a driving device is provided, the steering device can be used as a power steering frame.

In this embodiment, a driving device 2 is disposed on the frame 1 for driving the wheels to rotate. Specifically, the driving device 2 includes: traction motor 21, coupling 22 and gear box 23. Wherein the traction motor 21 is connected to the cross beam 12, in particular to the motor mount 13. The gearbox 23 is connected to the cross beam 12, in particular to the gearbox hanger bracket 14 by a gear boom 24, the output end of the gearbox 23 being press-fitted with an axle 32. Half of the coupling 22 is press-fitted with the input shaft of the gearbox 23 and the other half is press-fitted with the output shaft of the traction motor 21.

When the bogie is assembled, the traction motor 21 with the half coupling is mounted on the cross beam 12 through a fastener, the framework 1 with the traction motor 21 is dropped on the wheel set 3 with the half coupling, and the gear box 23 is tightly connected with the framework 1 through a gear box suspender 24. The motor end half coupling and the gear box end half coupling are connected through fasteners such as bolts, so that transmission of force between output torque of the traction motor and the gear box is realized.

Further, the number of the driving devices 2 is three, the driving devices are respectively arranged in one installation space, one driving device 2 correspondingly drives the axle 32 in one wheel set 3 to rotate, one-to-one driving is realized, and higher driving force is achieved. The two driving devices 2 positioned at the two longitudinal ends of the bogie are centrosymmetric with the center of the bogie, so that the mass center of the traction motor is close to the mass center of the bogie, and the moment of inertia is reduced.

The wheel diameter of the wheel is 840 or 915 series according to the axle weight requirement, and the wheel diameter is smaller than that of the wheel of the traditional bogie. Because the bogie of the application adopts the H-shaped framework with double side beams and double cross beams, and the three groups of wheel pairs are used for bearing the weight of the vehicle body, the bearing capacity of each group of wheel pairs can be reduced, and therefore, wheels with smaller wheel diameters can be adopted, which is beneficial to reducing the height of the bogie so as to reduce the gravity center of the vehicle body.

The driving device adopts a traction motor, a coupler and a gear box structure, the relative locomotive axle-locking driving structure is simpler, the motor power is determined according to the traction requirement of a large road maintenance mechanical vehicle, the motor power is generally more than 350kW, the weight is generally less than 650kg, the weight of the motor is much lighter than 2450kg of the locomotive motor, the axle-locking box structure is canceled, and the gear box structure is also obviously different.

The secondary suspension 5 may be a rubber pile, a steel spring or an air spring. In this embodiment, the secondary suspension device 5 comprises at least three sets of rubber stacks 51 arranged in succession in the longitudinal direction. The rubber stacks 51 are provided in the middle of the side members 11, the number of which is matched according to the vehicle body weight.

Further, a lateral damper 52 is provided at an end portion of the side member 11 so as to extend in the lateral direction, and one end thereof is connected to the lateral damper mount 19 of the side member 11 and the other end thereof is connected to the vehicle body. The transverse damper 52 is arranged at the end part of the side beam, so that the daily maintenance of constructors is convenient.

In addition, a lateral stopper 53 is provided outside the middle portion of the side member 11. When the vehicle runs along a straight line, a certain gap is reserved between the transverse stop 53 and the vehicle body; when the vehicle turns, the lateral stop 53 on one side contacts the vehicle body for limiting excessive lateral displacement between the vehicle body and the truck.

In this embodiment, the foundation brake 7 is a tread brake mounted on the brake mount 16 of the beam 12.

The present embodiment also provides a railway vehicle comprising a bogie as provided in any one of the above. The rail vehicle has the same technical effect as the bogie.

In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the drawings are merely for convenience in describing the present application and simplifying the description, and do not indicate or imply that the device or element in question must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present application.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present application, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.

In the present application, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; may be mechanically connected, may be electrically connected or may communicate with each other; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art according to the specific circumstances.

While preferred embodiments of the present application have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. It is therefore intended that the following claims be interpreted as including the preferred embodiments and all such alterations and modifications as fall within the scope of the application.

It will be apparent to those skilled in the art that various modifications and variations can be made to the present application without departing from the spirit or scope of the application. Thus, it is intended that the present application also include such modifications and alterations insofar as they come within the scope of the appended claims or the equivalents thereof.

Claims

1. A triaxial electric drive bogie, characterized in that: comprising

The framework consists of two parallel side beams and two cross beams connected between the side beams, wherein the two cross beams are arranged in parallel at intervals; the space between the two side beams is divided into three installation spaces by the two cross beams;

a suspension device arranged between the axle box and the side beam;

The secondary suspension device is arranged in the middle of the side beam;

The traction device is arranged below the side beam and is used for being connected with the vehicle body; the traction device spans the two side beams and extends to the outer sides of the side beams, and performs traction action in a horizontal plane;

A suspension system includes:

The two groups of steel spring assemblies are arranged between the axle box and the side beams; the two groups of steel spring assemblies are sequentially distributed along the longitudinal direction parallel to the side beams;

The vertical vibration damper extends along the vertical direction and is connected between the axle box and the side beam; the vertical vibration damper is positioned between the two groups of steel spring assemblies;

the steel spring assembly includes:

The outer ring steel spring extends along the vertical direction in the elastic deformation direction;

the elastic deformation direction of the inner ring steel spring extends along the vertical direction; the inner ring steel spring is positioned in the outer ring steel spring, and the spiral direction of the inner ring steel spring is opposite to the spiral direction of the outer ring steel spring;

The top end of the guide post is connected with the side beam, the bottom end is inserted into the inner ring steel spring and is matched with the axle box in a positioning way;

Further comprises: the driving device is arranged on the framework and used for driving the wheels to rotate; the number of the driving devices is three, the driving devices are respectively arranged in one installation space, and one driving device correspondingly drives an axle of one wheel pair to rotate; the two driving devices at the two longitudinal ends of the bogie are symmetrical with the center of the bogie.

2. The bogie of claim 1, wherein the traction device comprises:

The crank arm is rotatably arranged on the lower surface of the side beam; the two side beams are correspondingly provided with crank arms;

the balance rod extends along the transverse direction parallel to the cross beam, and two ends of the balance rod are respectively connected with the crank arms on the two side beams in a rotating way;

A pull rod extending along the longitudinal direction parallel to the side beam, one end of the pull rod is rotationally connected with the crank arm, and the other end of the pull rod is connected with the vehicle body;

The crank arm, the balance rod and the pull rod relatively move in the same horizontal plane.

3. The bogie of claim 2, wherein the crank arm comprises: two connecting rod parts which are mutually perpendicular and in L shape, and the joint of the two connecting rod parts is rotationally connected with the side beam; the end of one connecting rod part is connected with the balance rod, and the end of the other connecting rod part is connected with the pull rod.

4. The bogie of claim 1, wherein the drive means comprises:

the traction motor is connected to the cross beam;

the gear box is connected to the cross beam through a suspension rod, and the output end of the gear box is pressed with the axle;

And one half of the coupler is pressed with the input shaft of the gear box, and the other half of the coupler is pressed with the output shaft of the traction motor.

5. The bogie of claim 1, wherein the secondary suspension comprises at least three sets of rubber stacks arranged in sequence in the longitudinal direction.

6. A rail vehicle, comprising: the three-axle electric drive truck of any one of claims 1-5.