CN112644550B

CN112644550B - Steering frame

Info

Publication number: CN112644550B
Application number: CN201910960539.4A
Authority: CN
Inventors: 刘坤; 郝涛广; 荆红伟; 卢权; 刘春海; 高婧
Original assignee: CRRC Tangshan Co Ltd
Current assignee: CRRC Tangshan Co Ltd
Priority date: 2019-10-10
Filing date: 2019-10-10
Publication date: 2022-07-22
Anticipated expiration: 2039-10-10
Also published as: CN112644550A; WO2021068404A1

Abstract

The embodiment of the application provides a bogie which comprises a framework and a direct drive motor, wherein the direct drive motor is arranged below the framework; the frame includes: a rigid frame body; a composite layer secured at least in the outer surface of the frame body in a position for securing a truck mount, the composite layer for spacing the truck mount from the frame body; the direct drive motor is a driving device of the bogie, the framework is used as a mounting base of the bogie, and the bogie mounting seat is used for mounting all parts of the bogie. The technical problems that vibration between a framework in the bogie and a part of the bogie is large and a driving device occupies a large space are solved.

Description

Steering frame

Technical Field

The application relates to the technical field of railway vehicles, in particular to a bogie.

Background

Rail vehicles are an important traffic tie linking cities. The rail vehicle mainly includes: the bogie is used for bearing the vehicle body and realizing walking and steering functions.

The conventional bogie mainly includes: the power bogie comprises a framework, wheel pairs, a traction device, a braking device, a buffering device and a driving device, such as a direct drive motor. The frame is the main framework of the bogie, and many parts of the bogie are fixed with the frame through a metal bogie mounting seat. The conventional frame is an H-shaped frame formed by welding stainless steel materials. The rigid connection between the components of the bogie and the frame results in greater vibration of the bogie, which in turn results in less comfort of the rail train.

Therefore, the large vibration between the frame and the parts of the bogie in the bogie and the large space occupied by the driving device are technical problems which the skilled person needs to solve urgently.

The above information disclosed in the background section is only for enhancement of understanding of the background of the present application and therefore it may contain information that does not form the prior art that is known to a person of ordinary skill in the art.

Disclosure of Invention

The embodiment of the application provides a framework of a bogie, and aims to solve the technical problems that vibration between the framework in the bogie and parts of the bogie is large and a driving device occupies a large space.

The embodiment of the application provides a bogie which comprises a framework and a direct drive motor, wherein the direct drive motor is arranged below the framework; the frame includes:

a rigid frame body;

a composite layer secured at least in the outer surface of the frame body in a position for securing a truck mount, the composite layer for spacing the truck mount from the frame body;

the direct drive motor is a driving device of the bogie, the framework is used as a mounting base of the bogie, the bogie mounting seat is used for mounting all parts of the bogie, and the top of the secondary suspension device is used for being connected with a vehicle body.

Due to the adoption of the technical scheme, the embodiment of the application has the following technical effects:

the rigid frame main body provides enough rigidity for the frame of the bogie to serve as an installation foundation of the bogie; secondly, the composite material layer is fixed at the position for fixing the bogie mounting seat in the outer surface of the frame main body, and then after the frame and the bogie mounting seat are installed, at least one composite material layer is arranged between the bogie mounting seat and the frame main body, so that the composite material layer has good self vibration absorption performance and good energy absorption performance, and the vibration between the frame and the bogie in the bogie of the embodiment of the application can be reduced. The direct drive motor is used as a driving device, and the direct drive motor does not need to be transmitted by a transmission device, so that the occupied space is small.

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 application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application. In the drawings:

FIG. 1 is a schematic view of a truck according to an embodiment of the present application;

FIG. 2 is a schematic view of the frame of the truck of FIG. 1;

FIG. 3 is a cross-sectional view of FIG. 2 at a frame rail;

FIG. 4 is an exploded view of FIG. 2;

FIG. 5 is a cross-sectional view of the insert of FIG. 2;

FIG. 6 is a top perspective view of the frame of the truck of FIG. 1;

FIG. 7 is a bottom perspective view of a frame of the truck of FIG. 1;

FIG. 8 is a schematic structural view of the plate spring assembly of the bogie shown in FIG. 1 respectively engaged with the first connecting assembly and the second connecting assembly;

FIG. 9 is a schematic view of the leaf spring set of the truck of FIG. 1 engaged with a second attachment assembly;

FIG. 10 is a schematic view of the plate spring assembly of the bogie shown in FIG. 1 engaged with a first connecting assembly;

fig. 11 is an exploded view of a suspension and axle box of the truck of fig. 10.

Description of reference numerals:

100 frames, 111 frame bodies, 112 composite material layers,

121 framework longitudinal beams, 121-1 horizontal mounting plates, 121-2 yielding parts,

122 frame cross-members, 122-2 holes for draft gear mounting, 1221 leaf spring attachment,

130, an insert, 131, a middle fixed seat, 132, a fixed flange,

a first step of the 141 stepped recess, a second step of the 142 stepped recess,

152 a bogie mount;

210 a leaf spring set; 211 a first spring plate; 212 a second spring plate;

213 a first connection assembly; 2131a first lower connecting piece;

2131a leaf spring end receiving groove; 2131b a connecting seat; 2132 a first upper connecting piece;

214 a second connection assembly; 2141a second upper connecting member;

2141a plate spring receiving groove; 2142 a second lower connecting member;

230 a tie bar;

312 wheels;

410 axle boxes;

500 secondary suspension devices;

15 direct drive motor.

Detailed Description

In order to make the technical solutions and advantages in the embodiments of the present application more clearly understood, the following description of the exemplary embodiments of the present application with reference to the accompanying drawings is made in further detail, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and are not exhaustive of all the embodiments. It should be noted that, in the present application, the embodiments and features of the embodiments may be combined with each other without conflict.

Example one

The embodiment provides a bogie, which can be applied to a railway vehicle, wherein the railway vehicle can be a diesel locomotive or an electric locomotive, and can be a motor train unit, a subway, a light rail or a tramcar.

FIG. 1 is a schematic view of a truck according to an embodiment of the present application; FIG. 2 is a schematic view of the frame of the truck of FIG. 1; fig. 3 is a cross-sectional view of fig. 2 at a frame cross member.

As shown in fig. 1, 2 and 3, the bogie of the embodiment of the application comprises a framework 100 and a direct drive motor 15, wherein the direct drive motor 15 is mounted on the framework 100; the frame 100 includes:

a rigid frame body 111;

a composite layer 112 of material, the composite layer 112 being secured at least in the outer surface of the frame body in a position for securing a truck mount, the composite layer for spacing the truck mount from the frame body;

the direct drive motor is a driving device of the bogie, the framework is used as a mounting base of the bogie, and the bogie mounting seat is used for mounting all parts of the bogie.

According to the bogie provided by the embodiment of the application, the rigid framework main body provides enough rigidity for the framework of the bogie to serve as an installation foundation of the bogie; secondly, the composite material layer is fixed at the position for fixing the bogie mounting seat in the outer surface of the frame main body, and then after the frame and the bogie mounting seat are installed, at least one composite material layer is arranged between the bogie mounting seat and the frame main body, so that the composite material layer has good self vibration absorption performance and good energy absorption performance, and the vibration between the frame and the bogie in the bogie of the embodiment of the application can be reduced. The direct drive motor is adopted as a driving device, the direct drive motor does not need to be transmitted by a transmission device, and the occupied space is small.

With respect to the construction of the frame, in practice, the composite layer 112 wraps around the entire outer surface of the frame body, as shown in FIG. 1.

Thus, the whole framework is a framework main body with rigid inside, and the outer layer is wrapped on the whole outer surface of the framework main body and is a framework with a sandwich structure. Thus, when a certain bogie mounting seat exerts pulling or extruding force on the composite material layer, the force is transmitted to the whole composite material layer, the force is dispersed, and the framework is firmer.

In an implementation, the composite layer is a unitary structure. The composite material layer of integrated structure for the framework is as a whole, and is more firm, simultaneously, also makes the effect of power maximum dispersion.

The materials of the frame are explained below.

In an implementation, the composite material layer is a composite material layer of a carbon fiber material.

The carbon fiber material is used as a new material, and has the advantages of small density, high strength, good energy absorption, good vibration absorption, excellent process and the like, and the composite material layer of the carbon fiber material also has the advantages. The application of the new material of carbon fiber material to the frame products is one of the development directions of the frame. In order to accommodate this development, adaptive modifications of the structure of the frame are required.

In practice, the composite layer is bonded to the outer surface of the carcass body. The layer of conformable material can be readily secured to the entire outer surface of the frame body by adhesive bonding.

In practice, the frame body is a metal frame body having a low density and a high strength. In this way the weight of the frame and thus the weight of the bogie is low.

As an alternative, the frame body is a frame body of a honeycomb aluminum material. The honeycomb aluminum material has small density and high strength, ensures that the strength of the framework main body is large enough, and simultaneously has smaller weight.

The shape of the frame is explained below.

In practice, as shown in fig. 2, the frame 100 is a cross-shaped frame, and includes a frame longitudinal beam 121 along a longitudinal direction and a frame cross beam 122 intersecting the frame longitudinal beam;

wherein the longitudinal direction is a running direction of the bogie.

In a conventional H-shaped frame, the side rails are densely connected with the multiple parts of the bogie, and after the bogie is placed on the track, there are dense multiple parts of the bogie near the running rails of the track. The bogie comprises a cross-shaped framework, a framework longitudinal beam and a bogie, wherein the framework longitudinal beam is positioned in the middle of a framework cross beam and is connected with a plurality of components of the bogie; after the bogie is placed on the track, the number of parts of the bogie between the two running rails is increased, and the number of parts of the bogie near the running rails is reduced, so that the utilization of the space between the two wheel pairs of the bogie is facilitated.

In practice, as shown in fig. 2, the frame longitudinal beam 121 has a shape with two ends higher and a middle lower, and the two ends of the frame longitudinal beam 121 are used for connecting with a primary suspension device of a bogie.

The two ends of the framework longitudinal beam are connected with a primary suspension device of the bogie, so that the height is large, and the framework longitudinal beam is in a shape with two high ends and a low middle part, so that the requirement can be met.

As an alternative, as shown in fig. 2, the truss longitudinal beam 121 includes:

horizontal mounting plates 121-1 which are positioned at two ends in the longitudinal direction and are horizontally arranged, wherein the horizontal mounting plates 121-1 are higher than the framework cross beam 122;

and a yielding part 121-2 connected between the horizontal mounting plate and the frame beam.

Therefore, the structural frame longitudinal beam has the shape characteristics of high ends and low middle parts, is embodied into a regular shape, and is convenient for processing and manufacturing the structural frame.

In practice, as shown in fig. 2, the frame stringers 121 have a thickness that increases gradually from both ends to the middle.

The thickness of the longitudinal beam of the framework is gradually increased from two ends to the middle part, so that the longitudinal beam of the framework can adapt to the characteristic that the middle part of the longitudinal beam of the framework bears larger weight.

In practice, as shown in fig. 2, the frame stringers 121 have a width that increases gradually from the ends to the middle.

The truss longitudinal beam has the characteristic that the width of the truss longitudinal beam is gradually increased from two ends to the middle part, and can adapt to the characteristic that the middle part of the truss longitudinal beam bears larger weight.

In operation, the frame 100 is a symmetrical structure, as shown in FIG. 2.

The framework with the symmetrical structure is convenient to process and manufacture and is also convenient to balance stress.

In practice, as shown in FIG. 2, a towing means mounting hole 122-2 is provided at the center of the frame beam, and the towing means mounting hole 122-2 is used for mounting the towing means of the bogie.

In implementation, as shown in fig. 1, the suspension device further includes a secondary suspension device 500, which includes two air springs; the air springs are two and are symmetrically mounted on the frame cross member 122.

The following describes how the truck mount is secured to the frame. FIG. 4 is an exploded view of FIG. 2; fig. 5 is a cross-sectional view of one of the inserts of fig. 2.

In practice, as shown in fig. 4 and 5, the framework further comprises:

a rigid insert 130, the bottom of the insert 130 being located within the composite layer 112 to secure the insert to the composite layer and expose the top of the insert 130; namely, a bottom layer of the composite material layer is arranged between the insert and the framework main body;

wherein the top of the insert is used to mount the truck mount 152.

In this way, the rigid insert is secured to the composite layer to solve the insert securement problem, and the truck mount 152 is mounted on top of the insert to solve the truck mount securement problem. As a common approach, the truck mount 152 is secured to the top of the insert by bolts and bolt holes. Fig. 2 shows a plurality of configurations of the truck mount 152 and a plurality of configurations of the insert 130, the configuration of the insert 130 cooperating with the configuration of the truck mount 152 to which it cooperates to secure the truck mount to the top of the insert.

As for the structure of the insert, as shown in fig. 4 and 5, the insert includes:

a central fixed seat 131;

a fixing flange 132, wherein the fixing flange 132 extends outwards from the middle fixing base 131, and the thickness of the middle fixing base is greater than that of the fixing flange;

the composite material layer covers the fixing flange 132 and exposes the top of the middle fixing seat 131;

wherein, the top of the middle fixing seat is used for installing the bogie mounting seat 152.

Therefore, the fixing flange enables the insert to be large in fixing area with the composite material layer, the insert is firmly fixed with the composite material layer, and the thickness of the middle fixing seat is larger than that of the flange, so that the middle fixing seat and the bogie mounting seat are more firmly fixed.

In cooperation with the structure of the insert, as shown in fig. 4 and 5, the frame body and the composite material layer have a stepped recess portion in cooperation with the insert;

the bottom of the stepped recess is matched with the shape of the middle fixed seat;

the first step 141 of the stepped recess is matched to the shape of the fixing flange.

The presence of the stepped recess allows the height of the insert to be controlled to match the height of the truck mount.

In practice, as shown in fig. 5, the second step 142 of the stepped recess is flush with the top of the fixing flange.

In practice, as shown in fig. 4 and 5, the fixing flange 132 is disposed at the middle or bottom of the side of the middle fixing base.

In practice, as shown in fig. 5, the ratio of the thickness of the central fixing seat to the thickness of the fixing flange is at least twice. The thickness of the middle fixing seat is larger, and the middle fixing seat and the bogie mounting seat can be more stably fixed through bolts and bolt holes; the thickness of the fixing flange is thin, so that the weight of the insert is low.

As an alternative embodiment, the insert is an insert of a honeycomb aluminum material.

As an alternative embodiment, the insert is an insert of a metal material having a low density and a high strength, and in particular, the insert is an insert of a honeycomb aluminum material.

The honeycomb aluminum material has small density and high strength, ensures that the strength of the insert is large enough, and simultaneously has small weight.

Example two

The embodiment provides a bogie, which has some characteristics on the basis of the first embodiment.

In this embodiment, the longitudinal direction is a direction parallel to the railway line, the transverse direction is a direction perpendicular to the railway line, the vertical direction is a vertical direction, and the longitudinal direction is an extending direction of the railway line, that is, the longitudinal direction is a running direction of the bogie.

FIG. 6 is a top perspective view of a frame of the truck of FIG. 1; fig. 7 is a bottom perspective view of a frame in the truck of fig. 1.

As shown in fig. 1, 6 and 7, the bogie provided by the present embodiment further includes: a series of suspension units and wheel sets.

As shown in fig. 1, the number of wheel pairs is two, and the two wheel pairs are respectively disposed on both longitudinal sides of the frame 100. The wheel pair includes: an axle extending in the lateral direction, and wheels 312. The number of wheels 312 is two, and the wheels are symmetrically arranged on the axle. The axle is also provided with an axle box 410, and a bearing is arranged in the axle box 410 so as to realize relative rotation with the axle through the bearing. The axle boxes 410 are two in number, symmetrically disposed on the axle, and located inside the two wheels 312.

As shown in fig. 1, 6 and 7, the primary suspension device includes a plate spring assembly 210; the plate spring assembly 210 extends in a lateral direction, and both ends thereof are connected to axle boxes 410 at both ends of the same axle, respectively. The middle of the plate spring group 210 is connected to the lower bottom of the frame rail 121. After the car is loaded, the middle part of the plate spring set 210 is subjected to a vertical downward pressure applied by the car through the frame 100, and the two ends of the plate spring set 210 are subjected to a vertical supporting force applied by the axle box 410, so that the plate spring set 210 is subjected to elastic bending deformation. In the running process of the carriage, the vibration between the wheel rails is transmitted to the axle box 410 through the axle and then converted into the elastic deformation of the plate spring group 210, and the vibration energy is absorbed in an elastic deformation mode, so that the vibration between the axle box 410 and the framework 100 is buffered, the vibration transmitted to the framework 100 can be reduced, the vibration of the carriage is reduced, and the riding comfort is improved.

The direct-drive motor is sleeved on the outer peripheral surface of the axle, two ends of the direct-drive motor are respectively fixed with two axle box bolts at two ends of the same axle, and the axle can rotate relative to the direct-drive motor so as to realize the installation of the direct-drive motor.

By employing a wheel set and a leaf spring set, the wheel set comprises: the device comprises an axle, wheels arranged on the axle and axle boxes; the leaf spring group extends along the transverse direction, the middle of the leaf spring group is connected with the framework longitudinal beam, two ends of the leaf spring group are respectively connected with the axle box of the same axle, and the vertical force between the axle box and the framework is buffered through the elastic bending deformation of the leaf spring group. And compare with the scheme of traditional adoption steel spring along vertical connection between framework and axle box, this embodiment adopts the leaf spring group to cushion, can reduce the height of framework, and then reduces the focus in carriage, improves rail vehicle's the stability of traveling. The plate spring group can buffer the vertical force between the framework and the axle box as one part of the primary suspension device, and the secondary suspension device arranged at the end part of the cross beam of the framework can buffer the vertical force between the framework and the vehicle body, so that two-stage buffering is realized, the vibration of the vehicle body is reduced, and the riding comfort is improved.

For the implementation of the plate spring set 210, the present embodiment provides a specific way:

FIG. 8 is a schematic structural view of the plate spring assembly of the bogie shown in FIG. 1 respectively engaged with the first connecting assembly and the second connecting assembly; FIG. 9 is a schematic view of the arrangement of the leaf spring sets in cooperation with the second connecting assembly of the truck of FIG. 1; FIG. 10 is a schematic view of the plate spring assembly of the bogie shown in FIG. 1 engaged with a first connecting assembly; fig. 11 is an exploded view of a suspension and axle box of the truck of fig. 10.

As shown in fig. 8 to 10, the plate spring group 210 includes: the first spring plate 211 and the second spring plate 212, both of which are elongated plate-like structures, extend in the lateral direction. The second spring plate 212 is stacked above the first spring plate 211, and the second spring plate 212 is shorter than the first spring plate 211. For the strip-shaped spring plate, the smaller the thickness is, the smaller the force required for elastic deformation is, and the smaller the strength is, therefore, the two spring plates are stacked together in the embodiment, which not only can satisfy the strength of the plate spring assembly 210, but also can reduce the force required for deformation of the plate spring assembly 210, so as to ensure that the deformation of the plate spring assembly 210 satisfies the buffering requirement.

The first spring plate 211 and the second spring plate 212 are stacked up and down, the middle portions of the two are connected to the frame longitudinal beam 121, and both ends of the first plate spring 211 are connected to the axle box 410.

A first linkage assembly 213 is used to connect between the end of the leaf spring pack 210 and the axlebox 410. The bottom of the first connection member 213 is provided with a shaft housing connection structure for connection with the shaft housing 410. A plate spring receiving chamber is provided in the first connection member 213, and an end of the plate spring group 210 may be inserted into the plate spring receiving chamber.

Both ends of the plate spring assembly 210 are connected to the axle boxes 410 by the first connection assemblies 213. The opening directions of the leaf spring accommodating cavities in the first connecting assemblies 213 at the two ends are opposite to each other, so that the two ends of the leaf spring group 210 are correspondingly inserted into the leaf spring accommodating cavities and cannot be separated from the leaf spring accommodating cavities after being assembled, so as to position the leaf spring group 210.

The embodiment further provides a specific implementation manner of the first connection component 213: as shown in fig. 10, the first connection member 213 includes: a first lower connector 2131 and a first upper connector 2132. The top of the first lower connecting member 2131 is provided with a plate spring end receiving groove 2131a which is opened upward, the size of the plate spring end receiving groove 2131a being matched with the size of the end of the first spring plate 211 so that the end of the first spring plate 211 is received in the plate spring end receiving groove 2131a, and the first lower connecting member 2131 is used for limiting the longitudinal movement of the first spring plate 211. The first upper link 2132 is connected to the top of the first lower link 2131 by a bolt, a cover is provided above the plate spring end receiving groove 2131a to form a plate spring receiving chamber, and the first upper link 2132 serves to restrict the vertical movement of the first spring plate 211.

Specifically, two connecting seats 2131b may be disposed at the bottom of the first lower connecting member 2131, bolt holes may be formed in the connecting seats 2131b, bolt holes may also be formed in the axle box 410, and the first lower connecting member 2131 may be fixed to the axle box 410 by bolts respectively penetrating through the bolt holes in the two connecting seats and the bolt holes in the axle box 410.

Both ends of the first spring plate 211 are inserted into the corresponding first connection members 213, and both ends thereof can move a certain distance in the first connection members 213 in a lateral direction, so that the lateral distance between both ends is reduced to meet the requirement of bending deformation.

In addition to the above, the two ends of the plate spring assembly 210 may be connected to the axle housing 410 in other manners, such as: oblong holes with lengths parallel to the transverse direction are formed at both ends of the plate spring group 210, and the plate spring group is fixed to the axle box by bolts that can pass through the oblong holes. The transverse distance between the two ends of the plate spring group 210 can be adjusted through the oblong holes when the plate spring group is subjected to bending deformation, so that the requirement of bending deformation is met.

Further, both ends of the first spring plate 211 are dovetail-shaped. The plate spring end receiving groove 2131a correspondingly extends to form a dovetail groove matched with the dovetail end of the first spring plate, the dovetail end of the first spring plate can be accommodated in the dovetail groove, and the dovetail groove is used for limiting the displacement of the first spring plate 211 moving along the transverse direction.

In addition, the second connecting assembly 214 is used to connect the middle of the plate spring assembly 210 to the frame rail 121. The top of the second connector assembly 214 is provided with a stringer connector for connection to the frame stringer 121. The second connecting member 214 is provided with a plate spring passage penetrating in the transverse direction, through which the plate spring unit 210 can pass, and the plate spring passage can restrict longitudinal and vertical movements of the plate spring unit 210.

This embodiment further provides a specific implementation manner of the second connection component 214, as shown in fig. 9, the second connection component 214 includes: a second upper connection 2141 and a second lower connection 2142. The second upper connecting member 2141 has a plate spring receiving groove 2141a with a downward opening, and penetrates the entire second upper connecting member 2141 in the lateral direction. The second lower connecting member 2142 is connected to the second upper connecting member 2141 by a bolt, and covers an opening of the plate spring receiving groove 2141a to form a plate spring passage. A leaf spring attachment 1221 is provided on the bottom surface of the end portion of the frame longitudinal beam 121, and a screw hole is provided in the leaf spring attachment 1221. The bolts sequentially pass through the bolt holes of the second lower connecting member 2142 and the bolt holes of the second upper connecting member 2141 from bottom to top and then are fixed to the threaded holes of the frame longitudinal beams 121.

On the basis of the above technical solution, as shown in fig. 11, the bogie further includes: a tie bar 230. A tie beam 230 extends in the transverse direction, is connected between the two axleboxes 410 of the same axle, and is located between the set of leaf springs and the axle.

The tie bar 230 is a rigid bar. Both ends of a tie beam 230 are also connected to the axle boxes 410 by bolts, respectively.

The present embodiment also provides a rail vehicle, including: a bogie as provided above. The rail vehicle provided by the embodiment adopts the bogie, and adopts the framework, the wheel set and the plate spring set, wherein the framework comprises a framework cross beam extending along the transverse direction and framework longitudinal beams extending to two sides from the middle part of the framework cross beam along the longitudinal direction respectively; the wheel pair includes: the device comprises an axle, wheels arranged on the axle and axle boxes; the plate spring group extends along the transverse direction, the middle of the plate spring group is connected with the framework longitudinal beam, two ends of the plate spring group are respectively connected with the axle boxes at the corresponding ends, and the elastic bending deformation of the plate spring group is used for buffering the axle boxes and the framework. And compare with the scheme of traditional adoption steel spring along vertical connection between framework and axle box, the leaf spring group is adopted to the embodiment and is cushioned, can reduce the height of framework, and then reduces the focus in carriage, improves rail vehicle's the stability of traveling. Above-mentioned leaf spring group can cushion the vertical power between framework and the axle box as primary suspension, and the secondary suspension who sets up at framework crossbeam tip can cushion the vertical power between framework and the automobile body, realizes the two-stage buffering, reduces the vibration of automobile body, improves and takes the comfort level.

In the description of the present application and the embodiments thereof, it is to be understood that the terms "top", "bottom", "height", and the like, indicate orientations or positional relationships based on those shown in the drawings, are merely for convenience in describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present application.

In the present application and its embodiments, unless specifically stated or limited otherwise, the terms "disposed," "mounted," "connected," "secured," and the like are to be construed broadly, e.g., as meaning fixedly connected, detachably connected, or integral with; the connection can be mechanical connection, electrical connection or communication; they may be directly connected or indirectly connected through intervening media, or may be connected through the use of two elements or the interaction of two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as the case may be.

In this application and its embodiments, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise the first and second features being in direct contact, or may comprise the first and second features being in contact, not directly, but via another feature in between. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. The first feature being "under," "beneath," and "under" the second feature includes the first feature being directly above and obliquely above the second feature, or simply meaning that the first feature is at a lesser level than the second feature.

The above disclosure provides many different embodiments, or examples, for implementing different features of the application. The components and arrangements of specific examples are described above to simplify the present disclosure. Of course, they are merely examples and are not intended to limit the present application. Moreover, the present application may repeat reference numerals and/or letters in the various examples, such repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed. In addition, examples of various specific processes and materials are provided herein, but one of ordinary skill in the art may recognize applications of other processes and/or use of other materials.

While the 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. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all alterations and modifications as fall within the scope of the application.

It will be apparent to those skilled in the art that various changes and modifications may be made in the present application without departing from the spirit and scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is intended to include such modifications and variations as well.

Claims

1. A bogie is characterized by comprising a framework and a direct drive motor, wherein the direct drive motor is arranged below the framework; the frame includes:

a rigid frame body;

the direct drive motor is a driving device of the bogie, the framework is used as a mounting base of the bogie, and the bogie mounting seat is used for mounting each part of the bogie;

a rigid insert, the bottom of the insert being located within the composite layer to secure the insert to the composite layer and expose the top of the insert;

wherein the top of the insert is used for mounting the bogie mounting seat.

2. The truck of claim 1 wherein the composite layer wraps around the entire outer surface of the frame body.

3. The truck of claim 2 wherein the composite layer is a unitary structure.

4. A bogie as claimed in claim 3 in which the composite material layer is a composite material layer of carbon fibre material.

5. The truck of claim 4 wherein the composite layer is bonded to the outer surface of the frame body.

6. The bogie according to claim 4, wherein the frame body is a frame body of a low density, high strength metallic material.

7. The bogie according to any one of claims 2 to 6, wherein the frame is a cross-shaped frame comprising a frame longitudinal beam in a longitudinal direction and a frame transverse beam intersecting the frame longitudinal beam;

wherein the longitudinal direction is a running direction of the bogie.

8. The bogie of claim 7, further comprising a secondary suspension device comprising two air springs; the two air springs are symmetrically arranged on the framework cross beam.

9. The truck of claim 7 wherein the frame rails are high at both ends and low at the middle;

wherein both ends of the frame rail are adapted to be connected to a primary suspension of the bogie.

10. The truck of claim 9 wherein the frame rail comprises:

horizontal mounting plates which are positioned at two ends in the longitudinal direction and are horizontally arranged, wherein the horizontal mounting plates are higher than the framework cross beam;

a abdication part connected between the horizontal mounting plate and the framework cross beam.

11. The truck of claim 10 wherein the frame rails are of progressively increasing thickness from the ends to the middle.

12. The truck of claim 11 wherein the frame rails increase in width progressively from end to mid.

13. The truck of claim 12 wherein the frame is a symmetrical structure.

14. The truck of claim 13 wherein a central location of the frame beam is provided with a draft gear mounting hole for mounting a draft gear of the truck.

15. The truck of claim 14 wherein the insert comprises:

a middle fixing seat positioned in the middle;

the fixing flange extends outwards from the middle fixing seat, and the thickness of the middle fixing seat is greater than that of the fixing flange;

the composite material layer covers the fixing flange and is exposed out of the top of the middle fixing seat;

the top of the middle fixing seat is used for installing the bogie mounting seat.

16. The truck of claim 15 wherein the frame body and the composite layer have a stepped recess that mates with the insert;

the first step of the stepped recess is matched with the shape of the fixing flange.

17. The truck of claim 16 wherein the second step of the stepped recess is flush with the top of the fixed flange.

18. The truck of claim 17 wherein the attachment flange is disposed at the middle or bottom of the side of the mid mount.

19. The bogie of claim 18, wherein the ratio of the thickness of the central anchor to the thickness of the anchor flange is at least two times.

20. The bogie of claim 19, wherein the insert is an insert of a honeycomb aluminum material.

21. The bogie of claim 7, further comprising:

a wheel set; the longitudinal both sides of framework respectively are equipped with a set of wheel pair, the wheel pair includes: the device comprises an axle, wheels arranged on the axle and axle boxes, wherein the axle boxes are positioned between the two wheels of the same axle;

a primary suspension device comprising a set of leaf springs; two ends of the plate spring group are respectively connected with axle boxes at two ends of the same axle, and the middle part of the plate spring group is connected with the lower bottom part of the framework longitudinal beam;

the direct-drive motor is sleeved on the outer peripheral surface of the axle, two ends of the direct-drive motor are respectively fixed with two axle box bolts at two ends of the same axle, and the axle can rotate relative to the direct-drive motor.

22. The truck of claim 21, further comprising:

the first connecting assembly is internally provided with a plate spring accommodating cavity for accommodating the end part of the plate spring group; and the bottom of the first connecting assembly is provided with an axle box connecting structure used for being connected with an axle box.

23. The bogie as recited in claim 22, further comprising:

the second connecting assembly is internally provided with a plate spring channel for the plate spring set to pass through; and the top of the second connecting assembly is provided with a longitudinal beam connecting structure used for being connected with the framework longitudinal beam.

24. The truck of claim 23 wherein the leaf spring set comprises:

a first spring plate extending in a lateral direction; the middle part of the first spring plate is positioned in the plate spring channel, and two ends of the first spring plate are respectively inserted into the plate spring accommodating cavities at the corresponding ends;

a second spring plate extending in a transverse direction with a middle portion thereof located within the leaf spring passage; the second spring plate is arranged above the first spring plate in a stacked mode; the length of the second spring plate is smaller than that of the first spring plate.

25. The truck of claim 24 wherein the first connection assembly comprises:

the top of the first lower connecting piece is provided with a plate spring end accommodating groove with an upward opening; the bottom of the first lower connecting piece is connected with the axle box through a bolt;

and the first upper connecting piece is connected with the top of the first lower connecting piece, and the cover is arranged above the plate spring end accommodating groove to form the plate spring accommodating cavity.

26. The truck of claim 24 wherein the second linkage assembly comprises:

a second upper connecting member; the second upper connecting piece is provided with a plate spring accommodating groove with a downward opening; the second upper connecting piece is connected with the framework longitudinal beam;

the second lower connecting piece is connected with the bottom end of the second upper connecting piece; the second lower link cover is provided at an opening of the plate spring receiving groove to form the plate spring passage.

27. The truck of claim 21 wherein the leaf spring sets are formed from a carbon fiber composite material.

28. The bogie of claim 21, wherein the primary suspension device further comprises:

and the tie beam extends along the transverse direction, connects two axle boxes of the same axle and is positioned between the plate spring group and the axle.

29. The bogie according to claim 28, wherein the tie beam is a rigid beam, and both ends of the tie beam are connected to the axle boxes by bolts, respectively.