Sealed bearing box type rail wheel set and rail car comprising same

Abstract

The utility model discloses a sealed bearing box type track wheel set and a track comprising the wheel set. The sealed bearing box type track wheel set comprises a wheel assembly, a first inner side sealing plate, a first inner side sealing plate, a first bearing, a second bearing, a first bearing box, a second bearing box, a first outer side sealing plate, a second outer side sealing plate and a shaft sleeve. According to the utility model, the structural form of the bearing box is optimized, and an open type is adopted, so that manufacturing and processing are simpler; the structural form and the assembly process of the outer side sealing plate are optimized, single-plate blanking machining is adopted, and manufacturing and machining are easy; the bearing box and the bearing box are assembled in a transition fit mode, the set screws are pressed, and the tedious bolt installation procedure is omitted; installation is convenient and operation is easy.

Description

Technical Field

[0001] The utility model relates to a novel sealed bearing box type rail wheel set used for traveling and running of a crane and a rail vehicle comprising the wheel set. Background Art

[0002] The operation of cranes is inseparable from the rail wheel set, which is usually composed of wheels, wheel axles, bearing boxes, sealing covers, bearings, etc., and is connected and fixed to the walking trolley structure by connecting bolts. The wheel bearing seal adopts a closed cavity seal formed by the bearing embedded in the semi-enclosed bearing box and fixed with the sealing cover by bolts, and the outer side of the inner ring of the bearing is locked with a round nut for axial positioning; the disadvantages of this sealing form are: first, the sealing cover and the bearing box need to be bolted, which is complicated to install; second, it is difficult to replace and disassemble the bearing, and the top screw hole needs to be processed in the bearing box for ejection; third, the semi-enclosed structure of the bearing box is difficult to manufacture and process; fourth, the special-shaped structure of the sealing cover caused by avoiding the locking nut for axial positioning of the bearing also brings inconvenience to the manufacturing and processing. Utility Model Content

[0003] In order to solve the technical problems existing in the prior art, the utility model provides a sealed bearing box type rail wheel set and a rail vehicle including the wheel set.

[0004] The technical solution for implementing the utility model is as follows:

[0005] A sealed bearing box type rail wheel set, comprising a wheel assembly, a first inner sealing plate, a second inner sealing plate, a first bearing, a second bearing, a first bearing box, a second bearing box, a first outer sealing plate, a second outer sealing plate, and a shaft sleeve;

[0006] The first inner sealing plate is installed in transitional cooperation with the wheel axle of the wheel assembly, and the second inner sealing plate is installed in transitional cooperation with the shaft sleeve and then installed in cooperation with the wheel axle of the wheel assembly;

[0007] The first bearing is integrally embedded in the inner hole of the first bearing box until the outer ring of the first bearing fits with the positioning step of the first bearing box, and the inner ring of the first bearing is installed on the bearing inner ring positioning step of the wheel shaft of the wheel assembly; the second bearing is integrally embedded in the inner hole of the second bearing box until the outer ring of the second bearing fits with the positioning step of the second bearing box; the inner ring of the second bearing is installed until its inner ring is tightly fitted with the end face of the sleeve; the first outer sealing plate is installed with a transition fit to the inner hole of the first bearing box and is tightened with a first set screw; the first grease nipple is installed on the end face of the first outer sealing plate; the second outer sealing plate is installed with a transition fit to the inner hole of the second bearing box and is tightened with a second set screw, and the second grease nipple is installed on the end face of the second outer sealing plate.

[0008] As a further technical solution, the wheel assembly includes a wheel, a wheel axle and a key, the wheel is connected to the axle shaft through the key, and the wheel, the wheel axle and the key are formed into the wheel assembly by a hot-fitting process.

[0009] As a further technical solution, the first bearing box adopts an open structure, with a bearing outer ring positioning step left on its through hole, and the outer end face is processed with bolt holes connected and fixed to the rail car end beam and a tightening threaded hole for fixing the first outer sealing plate.

[0010] As a further technical solution, the second bearing box adopts an open structure, with a bearing outer ring positioning step left on its through hole, and the outer end face is processed with bolt holes for connecting and fixing with the rail car end beam and a tightening threaded hole for fixing the second outer cover plate.

[0011] As a further technical solution, the first outer sealing plate is a circular thin plate on which a first grease nipple mounting hole is processed.

[0012] As a further technical solution, the second outer sealing plate is a circular thin plate on which a second grease nipple mounting hole is processed.

[0013] As a further technical solution, the first inner sealing plate is an annular thin plate, whose inner hole is finely machined to fit in transition with the wheel axle of the wheel assembly, and whose outer circle is roughly machined to leave a gap with the inner hole of the first bearing box so that it can rotate with the axle.

[0014] As a further technical solution, the second inner sealing plate is an annular thin plate, whose inner hole is finely machined to fit in transition with the wheel axle of the wheel assembly, and whose outer circle is roughly machined to leave a gap with the inner hole of the second bearing box so that it can rotate with the axle.

[0015] In a second aspect, the utility model further provides a rail vehicle, the wheel set of which adopts the sealed bearing box type rail vehicle wheel set.

[0016] As a further technical solution, bolts pass through the bolt holes on the first bearing box and the second bearing box to achieve the connection between the sealed bearing box type rail wheel set and the rail car body.

[0017] Beneficial effects of the utility model:

[0018] 1. The utility model optimizes the bearing box structure and adopts an open structure, which makes the manufacturing and processing simpler; at the same time, the bearing box can be easily separated and disassembled from the bearing, which is convenient for bearing disassembly and replacement;

[0019] 2. The structural form and assembly process of the outer sealing plate are optimized, and single plate cutting is adopted, which makes the manufacturing process simple. At the same time, the two outer sealing plates and the bearing box are assembled with transition fit and then tightened with set screws, which eliminates the tedious bolt installation process; the installation is more convenient and easy to operate.

[0020] 3. The utility model eliminates the need for axial fixing of the round nut on the inner ring of the bearing, and relies on the bearing itself to bear the deflection load. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the assembly of the rail wheel set of the utility model;

[0022] Figure 2 It is a cross-sectional schematic diagram of the rail wheel set of the utility model;

[0023] Figure 3 It is an exploded schematic diagram of the parts of the utility model;

[0024] Figure 4 This is a schematic diagram of the assembly of the utility model and the traveling trolley;

[0025] In the figure, 1 is a wheel assembly, 2-1 is a first inner sealing plate, 2-2 is a second inner sealing plate, 3-1 is a first bearing, 3-2 is a second bearing, 4-1 is a first bearing box, 4-2 is a second bearing box, 5-1 is a first outer sealing plate, 5-2 is a second outer sealing plate, 6-1 is a first set screw, 6-2 is a second set screw, 7-1 is a first grease nipple, 7-2 is a second grease nipple, 8-1 is a first connecting bolt, 8-2 is a second connecting bolt, and 9 is a shaft sleeve. DETAILED DESCRIPTION

[0026] It should be noted that the following detailed descriptions are illustrative and intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used in the present invention have the same meanings as those commonly understood by those skilled in the art to which the present invention belongs.

[0027] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present invention. As used herein, unless otherwise explicitly stated in the present invention, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "include" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof;

[0028] For the convenience of description, if the words "up", "down", "left" and "right" appear in the present invention, they only indicate that they are consistent with the up, down, left and right directions of the drawings themselves, and do not limit the structure. They are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the present invention.

[0029] As introduced in the background technology, there are deficiencies in the prior art. In order to solve the above technical problems, the present invention proposes a sealed bearing box type rail wheel set.

[0030] The present embodiment discloses a sealed bearing box type rail wheel assembly, comprising a wheel assembly 1, a first inner sealing plate 2-1, a second inner sealing plate 2-2, a first bearing 3-1, a second bearing 3-2, a first bearing box 4-1, a second bearing box 4-2, a first outer sealing plate 5-1, a second outer sealing plate 5-2, a first set screw 6-1, a second set screw 6-2, a first grease nipple 7-1, a second grease nipple 7-2, a first connecting bolt 8-1, a second connecting bolt 8-2, and a shaft sleeve;

[0031] The wheel assembly 1 comprises a wheel, a wheel axle and a key, wherein the wheel is connected to the axle shaft via the key, and the wheel, the wheel axle and the key are assembled into the wheel assembly by a heat-fitting process;

[0032] The first bearing box 4-1 and the second bearing box 4-2 adopt an open structure, that is, Figure 3 Figure 1 As shown, a through hole is formed in the middle thereof passing through the end thereof, that is, an open structure. The through hole is processed by boring, and a bearing outer ring positioning step is left on the inner ring of the through hole. The outer end faces of the first bearing box 4-1 and the second bearing box 4-2 are processed with bolt holes for connecting and fixing with the end beams of the rail vehicle. At the same time, the outer end faces are also processed with fixing threaded holes for fixing the outer sealing plates, and the manufacturing and processing are simple.

[0033] The first outer sealing plate 5-1 and the second outer sealing plate 5-2 are made of single plate, on which the first grease nipple 7-1 and the second grease nipple 7-2 are processed, and the outer circle is finely processed to fit the inner hole of the bearing box, and the screws are tightened to prevent falling off;

[0034] The first inner sealing plate 2 is installed with a transition fit with the wheel axle of the wheel assembly 1, and the second inner sealing plate 2-2 on the other side is first installed with a transition fit with the bushing 9, and then installed with the wheel axle of the wheel assembly 1; the first bearing 3-1 is embedded in the inner hole of the first bearing box 4-1 until the outer ring of the first bearing 3-1 fits in place with the positioning step of the first bearing box 4-1 to form a first assembly; the second bearing 3-2 is embedded in the inner hole of the second bearing box 4-2 until the outer ring of the second bearing 3-2 fits in place with the positioning step of the second bearing box 4-2 to form a second assembly; then, the first assembly is installed so that the bearing 3-1 is installed in place to the inner ring of the bearing of the wheel axle of the wheel assembly 1. Position the step and install the second component so that the bearing 3-2 is installed in place until the inner ring of the bearing and the end face of the sleeve 9 are tightly fitted; the first outer sealing plate 5-1 is installed with a transition fit with the inner hole of the first bearing box 4-1, and is tightened with a set screw 6-1 to prevent the outer sealing plate 5-1 from falling off, and a first grease nipple 7-1 is assembled on the end face of the first outer sealing plate 5-1; the second outer sealing plate 5-2 is installed with a transition fit with the inner hole of the second bearing box 4-2, and is tightened with a set screw 6-2 to prevent the outer sealing plate 5-2 from falling off, and a second grease nipple 7-2 is assembled on the end face of the second outer sealing plate 5-2; the first connecting bolt 8-1 and the second connecting bolt 8-2 connect the rail wheel group and the walking trolley structure.

[0035] The first inner sealing plate 2-1 and the second inner sealing plate 2-2 mentioned above are also made of single plate (i.e. a thin plate) and are annular plates. The inner hole of the annular plate is finely machined to fit with the wheel axle of the wheel assembly, and the outer circle is roughly machined to leave a gap with the first bearing box or the inner hole of the first bearing box so that it can rotate with the shaft.

[0036] When assembling a rail wheel assembly, the first step is to use a heat-fitting process to assemble the wheel, the wheel axle and the key into a wheel assembly. The first inner cover plate 2-1 on one side is installed in a transition fit with the wheel axle of the wheel assembly 1, and the second inner cover plate 2-2 on the other side is first installed in a transition fit with the shaft sleeve 9 and then installed in conjunction with the wheel axle of the wheel assembly 1.

[0037] In the second step, the first bearing 3-1 and the second bearing 3-2 are embedded into the corresponding inner holes of the first bearing box 4-1 and the second bearing box 4-2 until the outer rings of the first bearing 3-1 and the second bearing 3-2 are in place with the corresponding positioning steps of the first bearing box 4-1 and the second bearing box 4-2, and then the first bearing 3 on one side is installed into the bearing inner ring positioning step of the wheel axle of the wheel assembly 1, and the second bearing 3 on the other side is installed into place until the bearing inner ring is tightly fitted with the end face of the sleeve 9.

[0038] The third step is to install the first outer sealing plate 5-1 and the second outer sealing plate 5-2 with the transition fit of the inner holes of the first bearing box 4-1 and the second bearing box 4-2, and then tighten them with the first set screw 6-1 and the second set screw 6-2 to prevent the first outer sealing plate 5-1 and the second outer sealing plate 5-2 from falling off, and assemble the first grease nipple 7-1 and the second grease nipple 7-2 on the end faces of the first outer sealing plate 5-1 and the second outer sealing plate 5-2;

[0039] Finally, the assembled rail wheel set is connected and fixed to the traveling trolley structure by connecting bolts 8 for use.

[0040] The present embodiment optimizes and improves the bearing sealing form and axial positioning method of the rail wheel group, optimizes the bearing box structure, adopts an open bearing box and sealing plates installed on both sides to form a closed space seal; eliminates the round nut locking axial positioning on the outside of the bearing inner ring, and relies on the bearing itself to bear the almost negligible deflection load; the bearing outer ring and the bearing box inner ring are loosely matched, and the inner ring and the wheel axle are transitionally matched. When replacing the bearing, the bearing box and the bearing can be easily separated and disassembled, which is convenient for bearing replacement; the outer sealing plate is processed by single plate blanking, and its outer ring is transitionally matched with the inner hole of the bearing box, and is connected and fixed by screw compression, eliminating the cumbersome bolt installation process, and the installation and sealing plate production and processing are simpler, more economical and reasonable.

[0041] This embodiment also provides a rail vehicle, the rail vehicle includes the sealed bearing box type rail wheel set as described above. Since the rail vehicle is provided with the sealed bearing box type rail wheel set as described above, the rail vehicle also has all the advantages as described above. In some embodiments, the rail vehicle provided by the utility model can be any appropriate type of vehicle, such as a conventional train, a motor vehicle, a subway vehicle, a city rail vehicle, etc. The utility model is not limited to one or some specific types of rail vehicles.

[0042] Finally, it should be noted that relational terms such as first and second are merely used to distinguish one entity or operation from another entity or operation, but do not necessarily require or imply any actual relationship or order between these entities or operations.

[0043] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A sealed bearing box type rail wheel set, characterized in that: It includes a wheel assembly, a first inner sealing plate, a first inner sealing plate, a first bearing, a second bearing, a first bearing box, a second bearing box, a first outer sealing plate, a second outer sealing plate and a shaft sleeve; The first inner sealing plate is installed in transitional fit with the wheel axle of the wheel assembly, and the second inner sealing plate is installed in transitional fit with the shaft sleeve and then installed in conjunction with the wheel axle of the wheel assembly; The first bearing is integrally embedded in the inner hole of the first bearing box until the outer ring of the first bearing fits with the positioning step of the first bearing box, and the inner ring of the first bearing is installed on the bearing inner ring positioning step of the wheel shaft of the wheel assembly; the second bearing is integrally embedded in the inner hole of the second bearing box until the outer ring of the second bearing fits with the positioning step of the second bearing box; the inner ring of the second bearing is installed until its inner ring is tightly fitted with the end face of the sleeve; the first outer sealing plate is installed with a transition fit to the inner hole of the first bearing box and is tightened with a first set screw; the first grease nipple is installed on the end face of the first outer sealing plate; the second outer sealing plate is installed with a transition fit to the inner hole of the second bearing box and is tightened with a second set screw, and the second grease nipple is installed on the end face of the second outer sealing plate.

2. The sealed bearing box type rail wheel set according to claim 1, characterized in that: The wheel assembly comprises a wheel, a wheel shaft and a key, the wheel is connected to the axle shaft through the key, and the wheel, the wheel shaft and the key are formed into the wheel assembly by a hot-fitting process.

3. The sealed bearing box type rail wheel set according to claim 1, characterized in that: The first bearing box adopts an open structure, with a bearing outer ring positioning step left on its through hole, and a bolt hole connected and fixed to the rail car end beam and a tightening threaded hole for fixing the first outer sealing plate processed on the outer end surface.

4. The sealed bearing box type rail wheel set according to claim 1, characterized in that: The second bearing box adopts an open structure, with a bearing outer ring positioning step left on its through hole, and a bolt hole connected and fixed to the rail car end beam and a tightening threaded hole for fixing the second outer cover plate processed on the outer end surface.

5. The sealed bearing box type rail wheel set according to claim 1, characterized in that: The first outer sealing plate is a circular thin plate, and a first grease nipple mounting hole is processed on the first outer sealing plate.

6. The sealed bearing box type rail wheel set according to claim 1, characterized in that: The second outer sealing plate is a circular thin plate, on which a second grease nipple mounting hole is processed.

7. The sealed bearing box type rail wheel set according to claim 1, characterized in that: The first inner sealing plate is an annular thin plate, the inner hole of which is finely processed to transitionally fit with the wheel axle of the wheel assembly and installed, and the outer circle is roughly processed to leave a gap with the inner hole of the first bearing box, so that it can rotate with the axle.

8. The sealed bearing box type rail wheel set according to claim 1, characterized in that: The second inner sealing plate is an annular thin plate, the inner hole of which is finely processed to fit with the wheel shaft of the wheel assembly, and the outer circle is roughly processed to leave a gap with the inner hole of the second bearing box, so that it can rotate with the shaft.

9. A rail vehicle, characterized in that: The wheel set adopts the sealed bearing box-type rail wheel set described in any one of claims 1-8.

10. A rail vehicle as claimed in claim 9, characterized in that: The bolts pass through the bolt holes on the first bearing box and the second bearing box to achieve the connection between the sealed bearing box type rail wheel set and the rail car body.

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