CN215435859U

CN215435859U - Bogie grounding device, wheel shaft system and bogie

Info

Publication number: CN215435859U
Application number: CN202120029989.4U
Authority: CN
Inventors: 张会杰; 李天一; 张月军; 周锦铭; 张雪平
Original assignee: CRRC Qingdao Sifang Co Ltd
Current assignee: CRRC Qingdao Sifang Co Ltd
Priority date: 2021-01-07
Filing date: 2021-01-07
Publication date: 2022-01-07
Anticipated expiration: 2031-01-07

Abstract

The utility model relates to a bogie grounding device, an axle system and a bogie. The grounding device is embedded and installed in the installation groove of the wheel core of the wheel, the structure is simple, the installation space is saved, the daily maintenance is convenient, the current conduction is convenient, and the requirements of wheel rotation and current grounding are met.

Description

Bogie grounding device, wheel shaft system and bogie

Technical Field

The utility model relates to a railway vehicle bogie, in particular to a bogie grounding device, an axle system and a bogie, and belongs to the technical field of railway vehicle manufacturing.

Background

The bogie is a running part of the railway vehicle and plays roles of guiding, vibration damping and braking, wherein the axle system is the core of the bogie and plays a vital role in the safe running of the vehicle, and the bogie and the axle system thereof not only have enough strength, but also have good running stability and safety comfort so as to ensure the safety and comfort of passengers.

With the continuous development of world economy, the national demand of the meter-gauge line on the meter-gauge tramcar market is more and more extensive. The biggest difference between the meter gauge bogie and the standard gauge bogie is that the gauge of the meter gauge is narrower, generally 1000mm, so that various types of bogies used by the standard gauge cannot be used on a meter gauge line. The bogie of the meter gauge line is limited by the gauge, and the distance between two wheels of the bogie is small, so that the space for installing a series of springs, axle bridges, wheel shafts, grounding devices and the like is very limited, which brings a lot of difficulties to the design of a bogie axle system. For example, patent No. 201821844921.6 discloses a wheel axle device of a low-floor tramcar, wherein the wheel axle device is connected with wheels outside two axle heads of the axle through grounding devices respectively, the grounding devices in the wheel axle device are installed wholly protruding out of the axle heads and the wheels, and the wheel axle device has no problem in the installation of a standard rail bogie with large space, but is not suitable for a meter rail bogie with limited space.

SUMMERY OF THE UTILITY MODEL

The utility model mainly solves the technical problem of providing a bogie grounding device which has a simple and compact structure and is beneficial to saving the installation space, and also provides an axle system provided with the grounding device and a bogie.

In order to achieve the purpose, the technical scheme of the utility model is as follows:

the utility model provides a bogie earthing device, includes wheel and earthing device be provided with the mounting groove on the wheel core of wheel, the earthing device embedding is installed in the mounting groove, earthing device's outer lane and wheel core fixed connection, earthing device's inner circle passes through connecting piece and sets up the ground connection connecting seat fixed connection on the axle bridge.

Further, the mounting groove is provided on one side surface of the wheel core, and is formed by inward recessing of the surface of the wheel core.

Further, the mounting groove is arranged on the side face of the wheel core, which is on the same side with the wheel rim.

Further, the mounting groove is a cylindrical groove.

Further, the outer ring of the grounding device is fixedly connected with the wheel core through a bolt.

Furthermore, the connecting piece is fixedly connected with the grounding connecting seat and the inner ring of the grounding device through fasteners.

Further, the axle bridge is of a frame structure in a shape like a Chinese character kou or an H or a Chinese character mu, the two ends of the axle bridge are provided with axle heads, the wheels are arranged on the inner side of the axle bridge, and the grounding connecting seat is arranged at the axle neck of the axle head.

The other technical scheme of the utility model is as follows:

a bogie axle system comprising a wheel on which is mounted a bogie grounding device as described above and an axle.

The other technical scheme of the utility model is as follows:

a bogie comprising a frame mounting an axle system as described above.

In summary, the bogie grounding device, the axle system and the bogie of the present invention have the following advantages compared with the prior art:

(1) the grounding device is embedded and installed in the installation groove of the wheel core of the wheel, the structure is simple, and the installation space is saved.

(2) The utility model facilitates the conduction of current, solves the requirements of wheel rotation and current grounding, and is convenient for daily maintenance.

Drawings

FIG. 1 is a view showing the construction of the installation of the grounding device of the present invention;

FIG. 2 is a schematic structural view of a wheel axle system of a motor car bogie according to the present invention;

FIG. 3 is a schematic structural view of the trailer bogie axle system of the present invention;

FIG. 4 is a schematic view of the axle bridge construction of the present invention;

fig. 5 is a cross-sectional view of the structure of the wheel of the present invention after installation.

As shown in fig. 1 to 5, a wheel 1, an axle 2, a wheel core 3, a mounting groove 4, a grounding device 5, a wheel flange 6, a bolt 7, an axle box body 8, a spindle head 9, a shaft neck 10, a wheel hub 11, a grounding wire 12, a screw 13, a flange plate 14, a bolt hole 15, an axle body 16, a magnetic track mounting seat 17, a series of spring mounting seats 18, a circular bead 19, a sealing element 20, a rubber elastic element 21, a pressing ring 22, a pressing ring bolt 23, a large bearing 24 and a small bearing 25.

Detailed Description

The utility model is described in further detail below with reference to the following detailed description and accompanying drawings:

as shown in fig. 1 to 5, the present embodiment provides a bogie grounding device including a wheel 1 and an axle 2. An installation groove 4 is provided on a wheel core 3 of the wheel 1, and a grounding device 5 is fitted in the installation groove 4.

In this embodiment, the mounting groove 4 is provided on one side surface of the wheel core 3, and is formed by recessing the surface of the wheel core 3 inward, and the mounting groove 4 is a cylindrical groove. The mounting groove 4 may be open at the center point of the wheel core 3 or at a position offset from the center point, and the center axis of the cylindrical groove is parallel to or coaxial with the center axis of the wheel core 3.

In the present embodiment, as shown in fig. 2 and 3, in order to meet the requirement of the gauge of 1000mm, the axle 2 preferably adopts a frame structure in a shape like a Chinese character 'kou' or a shape like a Chinese character 'H' or a shape like a Chinese character 'mu', two wheels 1 are both arranged on the inner side of the frame-shaped axle 2, and the mounting groove 4 is arranged on the side surface of the wheel core 3 on the same side as the wheel flange 6, namely on the side facing the longitudinal center line of the bogie.

The outer ring of the grounding device 5 is fixedly connected with the wheel core 3 through a plurality of hexagon bolts 7, and the outer ring of the grounding device 5 rotates together with the wheel core 17. The notch of mounting groove 4 at core wheel 3 has a stair structure, and stair structure's diameter and earthing device 5's the protruding diameter phase-match of following of outer lane, and earthing device 5's the protruding edge of outer lane is put on the step, and a plurality of bolts 7 fixed connection of rethread, stair structure also play spacing effect to earthing device 5's installation.

The inner ring of the grounding device 5 is connected with the axle bridge 2 through a connecting piece (not shown in the figure), the connecting piece is a metal piece, a grounding connecting seat (not shown in the figure) is arranged on the axle bridge 2, and the connecting piece is fixedly connected with the grounding connecting seat and the inner ring of the grounding device 5 through bolts. When the wheel 1 rotates, the inner ring of the grounding device 5 and the axle bridge 2 are fixed together and do not rotate, and the current path can be ensured by the carbon brush of the grounding device 5.

As shown in fig. 4, axle heads 9 are provided at both ends of the axle 2, the wheel core 3 of the wheel 1 is installed in the axle heads 9, the grounding connecting seats are provided at the axle journals 10 of the axle heads 9, and the connecting members extend from the inner ring position of the grounding device 5 to the grounding connecting seats of the axle 2 along the side surfaces of the wheel core 3 without occupying an excessive installation space.

The wheel core 3 is connected with the wheel hub 11 through a grounding wire 12, and the grounding wire 12 is fixed with the wheel hub 11 through a screw 13 in a press fit mode. The current in the whole current conduction loop from the pantograph to the carriage, the axle 2, the wheel core 3, the wheel hub 11 and the rail directly flows through the wheel core 3 and the wheel hub 11 to enter the rail, so that the electric corrosion of the bearing is reduced, and the service life of the bearing is prolonged.

The grounding device 5 is arranged on the outer side surface of the wheel core 3 facing the longitudinal center line of the bogie, has a simple structure, realizes the function of current grounding, facilitates the conduction of current, meets the requirements of rotation and current grounding of the wheel 1, and is convenient for daily maintenance.

As shown in fig. 5, in this embodiment, the wheel 1 is an elastic wheel, which enhances damping of the wheel and reduces wheel-rail noise and wheel-rail acting force. The elastic wheel consists of a rubber elastic element 21, a hub 11, a wheel core 3, a pressure ring 22 and a pressure ring bolt 23. The wheel core 3 is installed in the center of the wheel hub 11 and extends to one side, and the wheel core 3 in this embodiment is of a solid structure to increase the structural strength of the wheel core 3. The rubber elastic element 21 is arranged among the wheel hub 11, the wheel core 3 and the pressing ring 22 and connected through interference fit, and the pressing ring 22 and the rubber elastic element 21 are fixed on the wheel core 3 through a pressing ring bolt 23.

In this embodiment, the rubber elastic element 21 adopts the V-shaped rubber block with the noise reduction effect, the outer ring of the V-shaped rubber block is in interference connection with the wheel hub 11, the wheel hub 11 is provided with the V-shaped cavity, the V-shaped rubber block is clamped by the wheel core 3 and the pressure ring 22 and is fastened and connected through the pressure ring bolt 23, and the inner ring of the V-shaped rubber block is simultaneously in interference fit connection with the wheel core 3. The rubber with the shape can bear loads of shearing and compression at the same time, and axial rigidity and radial rigidity can be matched by adjusting the included angle and the thickness of the V-shaped section of the rubber ring so as to achieve the best matching. The wheel hub 11 is elastically supported on the track, and by utilizing the damping characteristic of the rubber elastic element 21, the wheel track noise is reduced to a great extent, the unsprung mass is reduced, the wheel track acting force and abrasion are reduced, and the application conditions of the wheel and the axle are greatly improved.

As shown in fig. 3 and 5, the axle head 9 in this embodiment is a hollow cylindrical structure, and is fixedly connected with the wheel core 3 of the wheel 1 through an internal bearing, the exterior of the axle head 9 is in a two-stage step structure, and the diameter of the axle head 9 on the side close to the wheel 1 is larger than that on the side close to the flange 14. The wheel core 3 passes through the shaft head 9 and is fixedly connected with the flange plate 14 through bolts, and the brake disc and the coupling are fixed on the flange plate 14 through a plurality of bolts.

A large bearing 24 and a small bearing 25 are arranged in the shaft head 9, the large bearing 24 and the small bearing 25 adopt tapered roller bearings, the tapered roller bearings can bear radial force and axial force at the same time, the large bearing 24 and the small bearing 25 are arranged in a reverse installation mode, and an installation gap is formed between the large bearing 24 and the small bearing 25. The interior of the spindle nose 9 is of a multistage step-shaped structure, specifically, the spindle nose is of a five-stage step-shaped structure, the outer ring of the wheel core 3 is correspondingly of a multistage step shape, a large bearing 24 is mounted on a first-stage step surface, close to one side of a wheel rim, of the spindle nose 9 in an interference fit mode, a small bearing 25 is mounted on a third-stage step surface in an interference fit mode, and inner rings of the large bearing 24 and the small bearing 25 and the outer ring of the wheel core 3 of the wheel 1 are mounted together in an interference fit mode. A seal 20 is mounted at the small diameter end of the stub shaft 9 (i.e. the side mounted to the flange 14), the seal 20 being mounted to the stub shaft 9 by interference fit.

The large bearing 24 and the small bearing 25 of the wheel shaft system adopt electric insulation bearings, and special electric corrosion preventing paint is further smeared on the large bearing 24 and the small bearing 25, so that the condition of electric corrosion of the bearings is avoided. The axle system ensures the whole current path by installing the grounding device 5, a group of grounding devices 5 are respectively installed between two wheels 1 and an axle bridge 2, the axle bridge 2 is connected with the wheels 1 through the grounding devices 5, and the wheels 1 are contacted with rails, so that the grounding function is realized.

In the embodiment, a bogie axle system is also provided at the same time, and is used for the rice-rail track running. The power bogie wheel shaft system adopts a longitudinal coupling traction transmission mechanism, the front wheel 1 and the rear wheel 1 on the same side are mechanically coupled together through a traction motor, a gear box, a coupling and the like, and the traction transmission mechanism is installed in a longitudinal suspension structure.

The wheel shaft system comprises four independent wheels 1, an axle bridge 2 is arranged between the two opposite independent wheels 1, two axle bridges 2 are arranged on one bogie, and the two axle bridges 2 have the same structure. Four primary springs are mounted between each axle 2 and the bogie frame, and a magnetic track brake device (not shown) is also mounted on the axle 2.

As shown in fig. 2, a flange 14 is fixedly installed on one side, far away from a rim, of a wheel core 3 of a power bogie wheel 1 through bolts, the flange 14 is a central circular ring and is provided with radial rotating teeth on the periphery, a through hole is formed in the flange 14 and is fixedly connected with a coupling, and a traction transmission mechanism drives the wheel 1 to rotate through the coupling and the flange 14.

As shown in fig. 3, the flange 14 of the trailer bogie is circular, and the flange 14 is provided with a through hole for fixedly connecting with a brake disc (not shown). The brake disc is installed in the outside of wheel 1, and the braking clamp passes through the connecting seat (not shown in the figure) and installs on axle bridge 2, all through bolt fixed connection between connecting seat and axle bridge 2 and the braking clamp, is provided with the bolt hole 15 that is used for being connected with the connecting seat on axle bridge 2.

As shown in fig. 3, the axle bridge 2 includes two axle box bodies 8 and two axle bodies 16, the axle box bodies 8 are symmetrically arranged, the axle bodies 16 are two parallel beams, and the two axle box bodies 8 are connected with the middle axle body 16 to form an axle bridge structure with a frame structure shaped like a Chinese character 'kou'. Of course, one or two cross beams can be added in the middle of the frame to form an H-shaped or mesh-shaped frame structure, so that the overall structural strength of the axle bridge 2 is better.

The axle box body 8 is provided with a shaft head 9 protruding upwards at the center for fixedly connecting with the wheel 1, and two primary spring mounting seats 18 and a magnetic track mounting seat 17 are arranged on a shaft neck 10 of each axle box body 8. Two opposite wheels 1 are respectively arranged at the inner sides of two shaft heads 9, and a brake disc and a coupling (not shown in the figure) connected with a transmission mechanism are arranged at the outer sides of the shaft heads 9 so as to meet the gauge requirement of a metric rail.

The axle 2 adopts a 'square' structure, the wheels 1 are arranged on the inner side of the axle head 9, a series of spring mounting seats 18 and magnetic track mounting seats 17 are arranged on the outer side of the wheels 1, the transverse space between the two wheels 1 is reduced, the stress on the front side and the rear side is balanced, the strength and the rigidity of the whole structure can be improved, the stress on the axle 2 is more uniform, the safety is higher, the special requirement on the gauge of the gauge can be met, the height of a gauge bogie can be favorably reduced, and the mounting space of the bogie is saved. The axle bridge 2 is integrally provided with the axle head 9, the primary spring mounting seat 18 and the magnetic track mounting seat 17, and the traditional axle box body and other parts are not separately arranged, so that the number of parts and the workload of subsequent maintenance are reduced. The stress of the axle 2 is mainly concentrated on the upper and lower surfaces of a series spring mounting seat 18 and the axle 2. In this embodiment, two primary spring mounting seats 18 are disposed at the journals 10 on both sides of the axle head 9, which is beneficial to reducing stress concentration and improving the static strength and fatigue resistance of the axle 2. Magnetic track mount 17 sets up in the outside of one of them corner of axle journal 10, is outside convex "ear" shape roughly, installs two magnetic track mount 17 at the homonymy of a axostylus axostyle 2, and magnetic track arresting gear hangs on magnetic track mount 17 through suspended structure.

In this embodiment, the axle box body 8 is preferably an integrally cast structure, the axle body 16 is also an integrally cast structure, the axle box body 8 and the axle body 16 are connected together in a welding mode, the integral structure of the axle bridge 2 is simplified by the casting tailor-welding process, the difficulty of the casting process is reduced, the manufacturability is good, the implementation is easy, the cost is low, meanwhile, the axle bridge 2 is enabled to have sufficient fatigue resistance, the strength and the rigidity of the whole structure are ensured, the production efficiency is improved, and the cost is effectively reduced.

The cross section of the axle body 16 is preferably in a C-shaped configuration with the opening facing the wheel 1, but the cross section of the axle body 16 may also be in an X-shaped configuration with two sides recessed toward the center. The section of the shaft neck 10 connected with the shaft body 16 also adopts a C-shaped or X-shaped section structure which is the same as that of the shaft body 16, the structure is stable, the strength and the rigidity are better, the casting process of the shaft bridge 2 is more convenient, the weight of the shaft body 16 can be reduced under the requirement of ensuring the structural strength and the rigidity, the material is saved, and the total weight of the shaft bridge 2 is further reduced, so that the unsprung mass is reduced.

The two sides of the shaft head 9 and the shaft neck 10 at the corresponding side are transited through the arc ribs 19, the two arc ribs 19 are arranged in parallel, the effect of reinforcing ribs is achieved, the overall structural strength and rigidity of the shaft bridge 2 are increased, the effects of reducing local stress and improving fatigue resistance are achieved, meanwhile, the total weight of the shaft bridge 2 is reduced, materials are saved, and unsprung mass is reduced.

In order to further improve the overall structural strength and rigidity of the axle bridge 2, as shown in fig. 4, the axle box body 8 below the axle head 9 is provided with a downward convex part, two sides of the convex part are in transition with the adjacent axle journal 10 part through inclined planes, and preferably, the middle of the convex part is of an upward hollow structure, so that the overall structural strength and rigidity of the axle box body 8 can be improved, the static strength and the fatigue resistance of the axle bridge 2 are improved, and the total weight of the axle bridge 2 is also favorably reduced.

The axle bridge adopts the frame construction of "mouth" style of calligraphy, "H" shape or "mesh" font, has promoted axle bridge 2's overall structure intensity and rigidity, and can be favorable to reducing the bogie height, has satisfied the space requirement of meter gauge bogie, has realized the function of 100% low-floor tram independent wheel axle system.

The embodiment also provides a bogie for the meter gauge track, which comprises a framework, a primary suspension, a secondary suspension, a vertical shock absorber, a transverse shock absorber, a traction pull rod, an axle system and a grounding device.

Similar solutions can be derived from the solution given in the figures, as described above. However, any simple modification, equivalent change and modification of the above embodiments according to the technical essence of the present invention are within the scope of the technical solution of the present invention.

Claims

1. A bogie grounding device comprises wheels and a grounding device, and is characterized in that: the wheel core of the wheel is provided with a mounting groove, the grounding device is embedded in the mounting groove, the outer ring of the grounding device is fixedly connected with the wheel core, and the inner ring of the grounding device is fixedly connected with a grounding connecting seat arranged on the axle bridge through a connecting piece.

2. A bogie grounding device according to claim 1 wherein: the mounting groove is arranged on one side face of the wheel core and is formed by inwards sinking the surface of the wheel core.

3. A bogie grounding device according to claim 2 wherein: the mounting groove is arranged on the side face of the wheel core, which is at the same side with the wheel rim.

4. A bogie grounding device according to claim 2 wherein: the mounting groove is a cylindrical groove.

5. A bogie grounding device according to claim 1 wherein: and the outer ring of the grounding device is fixedly connected with the wheel core through a bolt.

6. A bogie grounding device according to claim 1 wherein: and the connecting piece is fixedly connected with the grounding connecting seat and the inner ring of the grounding device through fasteners.

7. A bogie grounding device according to claim 1 wherein: the axle bridge is of a frame structure in a shape like a Chinese character kou or an H or a Chinese character mu, the two ends of the axle bridge are provided with axle heads, the wheels are arranged on the inner side of the axle bridge, and the grounding connecting seat is arranged at the axle neck of the axle head.

8. A bogie axle system, comprising wheels and axle bridges, characterized in that: a bogie grounding device according to any one of claims 1 to 7 mounted on a wheel.

9. A bogie comprising a frame characterized by: an axle system according to claim 8 is installed.