CN213442551U

CN213442551U - Built-in axle box and bogie

Info

Publication number: CN213442551U
Application number: CN202021975479.8U
Authority: CN
Inventors: 于子良; 穆云飞; 黄志辉; 张锋珍; 任坤华; 齐洪峰
Original assignee: CRRC Industry Institute Co Ltd
Current assignee: CRRC Industry Institute Co Ltd
Priority date: 2020-09-10
Filing date: 2020-09-10
Publication date: 2021-06-15
Anticipated expiration: 2030-09-10

Abstract

The embodiment of the utility model provides a built-in axle box and bogie relates to rail transit equipment technical field. The built-in axle box comprises a box body, an inner sealing cover and an outer sealing cover, wherein the box body is provided with a mounting through hole for mounting a bearing, and the inner sealing cover and the outer sealing cover are respectively sealed and covered on two opposite sides of the box body to seal the bearing. In the built-in axle box and the bogie provided by the embodiment of the utility model, the inner sealing cover and the outer sealing cover are sealed and covered on two sides of the box body, so that the bearing is sealed and installed in the installation through hole, and therefore, the axle box is installed between two wheels of a wheel pair by virtue of the bearing sleeved on an axle of the wheel pair, the built-in axle box is realized, the width of a vehicle body is reduced, and the running speed is improved; meanwhile, the sealing connection mode can also effectively prevent the lubricating grease in the bearing from overflowing in the high-speed running process of the bearing to influence the service life of the bearing, and reduce the vibration and noise in the running process of the vehicle body.

Description

Built-in axle box and bogie

Technical Field

The utility model relates to a rail transit equipment technical field especially relates to a built-in axle box and bogie.

Background

The bogie is a key component of a rail transit vehicle, has the functions of bearing, guiding, damping, traction, braking and the like, and plays a decisive role in the stability, comfort, safety and the like of the vehicle. In the power distributed motor train unit, the weight of the power bogie is higher than the total weight of the motor train unit, and the weight of the power bogie has a great influence on the light weight of the whole motor train unit. The optimization effect of the light weight of the unsprung mass of the bogie on dynamic indexes such as derailment coefficients, wheel load shedding rate and critical speed is obvious. The bogie of the motor train unit adopts a two-system spring suspension system, and the mass from the wheel set to the part below a primary suspension device is called as the unsprung mass of the bogie. In order to reduce unsprung mass, the drive is realized by adopting a hollow motor suspension mode.

In the power transmission process of the hollow motor, power is transmitted to a front axle of the wheel pair by virtue of the axle box provided with the bearing. The length 1353mm of common axletree is left and right, and the motor occupies about 600mm, and the width of bearing is about 160mm, and the axle box occupies the space about 200mm, because of the space problem, the axle box is mostly external, leads to the automobile body width big, and windage is big in the operation process, is difficult to further improve functioning speed.

SUMMERY OF THE UTILITY MODEL

The embodiment of the utility model provides a built-in axle box and bogie for solve among the prior art the axle box external leading to the great defect of automobile body too wide windage, realize that the axle box is built-in.

An embodiment of the utility model provides a built-in axle box, including box, interior sealing cover and outer sealing cover, the box is equipped with the installation through-hole that is used for installing the bearing, interior sealing cover with outer sealing cover seals respectively the lid and closes the relative both sides of box are in order to seal the bearing.

According to the utility model discloses an embodiment's built-in axle box, the box includes box and lower box, go up the box with the connection can be dismantled to lower box.

According to the utility model discloses a built-in axle box of embodiment, it is equipped with spacing terminal surface and the spacing face of arc to go up the box, the notch of box down with spacing terminal surface is contradicted, the outer wall of box down with the spacing face of arc is contradicted.

According to the utility model discloses a built-in axle box, the outside of box is constructed with the flange, be constructed with the oil groove on the flange, the outer sealed lid is equipped with the seal groove, the outer sealed lid fits behind the box, the seal groove with the oil groove cooperatees and forms the pressure regulating passageway that is used for reducing bearing lubricating oil pressure.

According to the utility model discloses a built-in axle box, interior sealed lid includes that end cover and sealed lid close the interior retaining ring in the end cover outside, the end cover lid closes on the box, the end cover deviates from one side of box is equipped with first recess, interior retaining ring orientation one side of box is equipped with the second recess, first recess with the second recess cooperatees and forms the pressure regulating passageway.

According to the utility model discloses an embodiment's built-in axle box, the pressure regulating passageway is followed mounting hole's axial width is less than its edge mounting hole's radial width.

According to the utility model discloses a built-in axle box of an embodiment, the external seal lid towards one side of bearing with the interior retaining ring is constructed respectively towards one side of bearing and is used for restricting the spacing step of bearing axial motion.

According to the utility model discloses a built-in axle box, one side that interior retaining ring back of the body held is constructed and is used for the limit structure with the step complex of axletree.

According to the utility model discloses a built-in axle box, go up the casing and include bearing installation department, joint installation department and connection the bearing installation department with joint installation department's connecting portion, bearing installation department sets up the arc wall that is used for holding the bearing, joint installation department is equipped with the through-hole that is used for installing rubber joint, connecting portion are flat plate body structure.

The embodiment of the utility model provides a still provide a bogie, include as above built-in axle box.

In the built-in axle box and the bogie provided by the embodiment of the utility model, the inner sealing cover and the outer sealing cover are sealed and covered on two sides of the box body, so that the bearing is sealed and installed in the installation through hole, and therefore, the axle box is installed between two wheels of a wheel pair by virtue of the bearing sleeved on an axle of the wheel pair, the built-in axle box is realized, the width of a vehicle body is reduced, and the running speed is improved; meanwhile, the sealing connection mode can also effectively prevent the lubricating grease in the bearing from overflowing in the high-speed running process of the bearing to influence the service life of the bearing, and reduce the vibration and noise in the running process of the vehicle body.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a perspective view of an internal axle box according to an embodiment of the present invention;

FIG. 2 is a cross-sectional view of the built-in axle housing of FIG. 1;

FIG. 3 is a perspective view of the upper housing shown in FIG. 1;

FIG. 4 is a perspective view of the lower housing shown in FIG. 1;

FIG. 5 is a schematic view of the construction of the outer seal cap shown in FIG. 1;

fig. 6 is a schematic structural view of the end cap shown in fig. 1.

Reference numerals:

10. a box body; 11. mounting a through hole; 12. an upper box body; 13. a lower box body; 14. a limiting end face; 15. an arc-shaped limiting surface; 16. blocking edges; 17. an oil sump; 20. an inner sealing cover; 21. an end cap; 22. an inner retainer ring; 23. a limiting step; 24. a limiting structure; 30. an outer sealing cover; 31. sealing the groove.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

The structure of the built-in axle box according to the embodiment of the present invention will be described with reference to fig. 1 to 6.

As shown in fig. 1 and 2, an internal axle box according to an embodiment of the present invention includes a box body 10, an inner seal cover 20, and an outer seal cover 30. Wherein, the box 10 is provided with a mounting through hole 11 for mounting a bearing, and the inner sealing cover 20 and the outer sealing cover 30 are respectively sealed and covered on two opposite sides of the box 10 to seal the bearing.

Wherein, the box body 10 is in a cylinder-like shape, and the installation through hole 11 is in a circular through hole structure. The inner sealing cover 20 is fastened to the case 10 by bolts, and the outer sealing cover 30 is fastened to the case 10 by screws. For example, the inner sealing cover 20 is provided with four bolt holes, correspondingly, the box body 10 is provided with four threaded holes correspondingly, and the inner sealing cover 20 and the box body 10 are fastened together by means of bolts. The outer sealing cover 30 is similar to the coupling structure of the container body 10 and will not be described in detail. It should be noted that in the description of the embodiment of the present invention, the wheel set is used as the reference for the inner and outer differentiation, one side close to the wheel of the wheel set is the outer side, and one side close to the middle area of the wheel set, that is, the side far away from the wheel, is the inner side.

The embodiment of the utility model provides a built-in axle box, the both sides at box 10 are closed with outer sealing cover 30 lid to the internal sealing lid 20 to with bearing seal installation in installation through-hole 11, from this, with the help of cup jointing at the epaxial bearing of wheel pair axle, install the axle box between two wheels of wheel pair, realize the built-in of axle box, reduce automobile body width, improve functioning speed. In addition, the sealing connection mode can effectively prevent the lubricating grease in the bearing from overflowing in the high-speed running process of the bearing to influence the service life of the bearing, and reduce the vibration and noise in the running process of the vehicle body.

As shown in fig. 2, the box 10 includes an upper box 12 and a lower box 13, and the upper box 12 and the lower box 13 are detachably connected together. The upper box body 12 and the lower box body 13 are distributed with semicircular arc-shaped grooves, and after the upper box body 12 and the lower box body 13 are butted together, the two arc-shaped grooves are butted to form a mounting through hole 11. In order to ensure the integrity of the installation through hole 11 after the upper box 12 and the lower box 13 are butted, when the installation through hole 11 is processed in the upper box 12 and the lower box 13, the upper box 12 and the lower box 13 are connected together by using a conical pin shaft, then punching processing is carried out, and after processing, the upper box 12 and the lower box 13 are preferably used in pairs so as to avoid processing and manufacturing errors from influencing the precision of the installation through hole 11. As shown in fig. 3, two mounting holes are respectively formed on two opposite sides of the upper case 12 and the lower case 13 along the radial direction of the bearing, so that the upper case 12 is provided with four mounting holes, and the lower case 13 is correspondingly provided with four mounting holes, and positioning and mounting are performed by means of the four mounting holes. For example, one of two mounting holes on two radial sides is used as a positioning hole for accurately positioning a conical pin shaft, and the other mounting hole is used for fastening a mounting bolt.

As shown in fig. 3, the upper case 12 is provided with a limit end face 14 and an arc-shaped limit face 15, the end face of the lower case 13 abuts against the limit end face 14, and the outer wall of the lower case 13 abuts against the arc-shaped limit face 15. Wherein, spacing terminal surface 14 is the spacing plane that is located 12 arc wall notches of last box, and the spacing face of arc 15 is the concave surface with the outer wall adaptation of lower box 13, and this spacing face of arc 15 links to each other with spacing terminal surface 14, all is located the notch both sides of arc wall. When the upper box body 12 is butted with the lower box body 13, the lower box body 13 is inserted between the two arc-shaped limiting surfaces 15, is positioned and aligned through the tapered pin shaft and is then fixedly connected through the bolt. Of course, the lower case 13 may also be provided with a limit end surface 14 and an arc-shaped limit surface 15, and at this time, the butt joint structure is similar to that described above and will not be described again.

In order to avoid bearing oil spillage, the outside of the housing 10 is configured with a lip 16. As shown in fig. 3 and 4, the rib 16 is protruded at the outer opening of the mounting through hole 11. The rib 16 is provided with an oil groove 17, and the outer sealing cover 30 is provided with a sealing groove 31. After the outer sealing cover 30 is covered on the housing 10, the sealing groove 31 and the oil groove 17 cooperate to form a pressure regulating channel for reducing the pressure of the bearing lubricating oil. Wherein, the upper box body 12 is provided with two circles of semi-circular arc-shaped groove bodies, the lower box body 13 is provided with two circles of semi-circular arc-shaped groove bodies, and after the upper box body 12 is butted with the lower box body 13, the semi-circular arc-shaped groove bodies are spliced to form two annular grooves. When the bearing is operated at high speed, grease is likely to flow from the high-pressure inner region to the low-pressure outer region. In order to avoid the grease from overflowing, as shown in fig. 5, three sealing grooves 31 are provided on the outer sealing cover 30, the grease is filled in one sealing groove 31 and then overflows into the other sealing groove 31, the pressure of the grease is released, and the pressure of the grease is reduced to atmospheric pressure by reducing the pressure layer by layer, so as to prevent the grease from overflowing under high pressure. As shown in fig. 2, the two oil grooves 17 are accommodated in two seal grooves 31 located on the outer circumference, and a pressure regulating passage is formed in a gap between the oil grooves 17 and the seal grooves 31.

On the basis of the above embodiment, the width dimension of the pressure regulating passage in the axial direction is smaller than the width dimension thereof in the radial direction. Wherein, the axial direction and the radial direction are subject to the axial direction and the radial direction of the bearing. In the process that lubricating grease in the bearing is discharged outwards, the width dimension of the pressure regulating channel along the axial direction is small, the amount of the lubricating grease overflowing outwards from the bearing is limited, the width dimension of the pressure regulating channel along the radial direction is large, the pressure of the lubricating grease entering the radial area from the axial direction enters a large space from a small space and then is released quickly, the pressure of the lubricating grease is released to normal pressure by means of the two circles of bent channels, and finally the lubricating grease is effectively prevented from overflowing under high pressure.

Likewise, a pressure regulating passage is also provided inside the case 10. As shown in fig. 2, the inner sealing cover 20 includes an end cover 21 and an inner retainer 22 hermetically covering the end cover 21, and the end cover 21 is covered on the case 10. As shown in fig. 6, a first groove is formed on one side of the end cover 21 away from the box body 10, a second groove is formed on one side of the inner retainer ring 22 facing the box body 10, and the first groove and the second groove cooperate to form a pressure regulating channel. The pressure regulating channel inside the box 10 is the same as the pressure regulating channel outside the box 10, and is used for preventing lubricating grease from overflowing.

As shown in fig. 2, both the outer sealing cap 30 and the inner collar 22 are respectively configured with a limiting step 23 for limiting the axial movement of the bearing on one side facing the bearing. After the bearing is installed in place, the limiting steps 23 are abutted to two sides of the bearing to limit the axial movement of the bearing. In addition, a stop 24 for engagement with a step of the wheel is formed on the side of the inner securing ring 22 facing away from the bearing. When the built-in axle box is installed on the axle of the wheel set, the axle box is prevented from moving along the axial direction of the wheel by the limiting structure 24 on the inner retainer 22. As shown in fig. 2, the limiting structure 24 is a stepped structure provided on the end face of the inner retainer ring 22 facing away from the bearing.

In an embodiment of the present invention, the upper case 12 is an integrally formed structure, and includes a bearing installation portion, a joint installation portion, and a connection portion connecting the bearing installation portion and the joint installation portion. Wherein, the bearing installation portion is provided with an arc-shaped groove for accommodating the bearing. The joint installation part is provided with a through hole for installing a rubber joint, and the connecting part is of a flat plate structure. Two ends of the plate body structure are respectively connected with the joint installation part and the bearing installation part.

In order to adapt to the limited space between two wheels in the wheel pair, the axial length of the built-in axle box is 150-160 mm, and compared with the traditional axle box structure with the axial length of 200mm, the width of the vehicle body is effectively reduced, the wind resistance in the running process of the vehicle body is reduced, and the running speed is further improved.

In addition, the embodiment of the utility model provides an use the bogie of above-mentioned built-in axle box still provides, and the hollow shaft motor is established to the wheel pair upper cover of bogie, and the hollow shaft motor passes through six link mechanism transmission and connects, and the axle box is laid in the both sides of hollow shaft motor.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.

Claims

1. The built-in axle box is characterized by comprising a box body, an inner sealing cover and an outer sealing cover, wherein the box body is provided with an installation through hole for installing a bearing, and the inner sealing cover and the outer sealing cover are respectively sealed and covered on two opposite sides of the box body to seal the bearing.

2. The built-in axle box of claim 1, wherein the housing comprises an upper housing and a lower housing, the upper housing being removably connected to the lower housing.

3. The built-in axle box according to claim 2, wherein the upper box body is provided with a limit end surface and an arc-shaped limit surface, the notch of the lower box body abuts against the limit end surface, and the outer wall of the lower box body abuts against the arc-shaped limit surface.

4. The built-in axle box according to claim 1, wherein a rib is formed on the outer side of the box body, an oil groove is formed on the rib, a sealing groove is formed on the outer sealing cover, and the sealing groove and the oil groove cooperate to form a pressure regulating channel for reducing the pressure of bearing grease after the outer sealing cover is covered on the box body.

5. The built-in axle box according to any one of claims 1 to 4, wherein the inner sealing cover comprises an end cover and an inner retainer ring which is sealed and covered on the outer side of the end cover, the end cover is covered on the box body, a first groove is arranged on one side of the end cover, which is far away from the box body, a second groove is arranged on one side of the inner retainer ring, which is far towards the box body, and the first groove and the second groove are matched to form a pressure regulating channel.

6. The built-in axle housing of claim 5, wherein the pressure regulating channel has an axial width along the mounting through-hole that is less than a radial width along the mounting through-hole.

7. The built-in axle box according to claim 5, wherein a side of the outer sealing cover facing the bearing and a side of the inner retainer facing the bearing are respectively configured with a limiting step for limiting axial movement of the bearing.

8. The built-in axle box according to claim 7, wherein the side of the inner collar facing away from the bearing is configured with a stop for engaging a step of the axle.

9. The built-in axle box according to claim 2 or 3, wherein the upper box body comprises a bearing mounting portion, a joint mounting portion and a connecting portion for connecting the bearing mounting portion and the joint mounting portion, the bearing mounting portion is provided with an arc-shaped groove for accommodating a bearing, the joint mounting portion is provided with a through hole for mounting a rubber joint, and the connecting portion is of a flat plate structure.

10. A bogie comprising an inbuilt axlebox according to any one of claims 1 to 9.