A wheel set for a variable gauge bogie

Abstract

The present invention provides a wheel set for a variable gauge bogie, which relates to the technical field of locomotive production and manufacturing. The wheel set for a variable gauge bogie comprises: an axle box beam, the inner wall of which is provided with a plurality of locking cone grooves arranged along the axial direction of the axle; an axle box front cover, which is arranged outside the axle end of the axle and connected to the axle box beam; an axle box body, which is arranged in the axle box beam, the outer wall of which is provided with a locking cone, one of the sides of the axle box body and the axle box front cover close to each other is provided with a limiting rib, and the other is provided with a limiting portion, and the limiting rib is used for limiting the position of the limiting portion; a sliding mechanism, which is respectively provided in the axle box body and the wheel; wherein the sliding mechanism is configured to drive the wheel and the axle box body to move along the axial direction of the axle, so that the locking cone is selectively engaged with one of the locking cone grooves, so as to switch between the unlocking mode and the locking mode, and is used for the wheel to change the gauge. The wheel set for a variable gauge bogie has good load-bearing effect and good reliability.

Description

Technical Field

[0001] The present invention generally relates to the technical field of locomotive production and manufacturing, and in particular to a wheelset for a variable gauge bogie. Background Art

[0002] Since different countries in the world use different railway gauges, for example, China's railways are standard gauge with a gauge of 1435mm, while Russia and most Eastern European and Central Asian countries use wide gauge with a gauge of 1520mm. During cross-border transport, domestic passenger and freight railway vehicles cannot pass directly from standard gauge lines to wide gauge lines, and need to stop and replace bogies that meet different gauge requirements.

[0003] The existing traditional locomotive wheelsets or EMU power wheelsets are assembled with wheels and axles through interference fit, so the inner distance of the wheelsets remains unchanged, which can only meet the operating requirements of one track gauge. When passing through lines with different track gauges, it is necessary to stop and return to the depot to replace the bogies adapted to the new track gauge before continuing to operate, which has many problems such as increased manpower and material costs, long time consumption, and low operating efficiency.

[0004] The existing variable gauge wheelset technologies at home and abroad can generally only be adapted to EMUs or passenger locomotives with smaller axle weights and traction. Although the structure of the gauge-changing mechanism can be designed to be relatively compact to reduce the difficulty of spatial layout, the high-power, high-axle-weight locomotives have very large loads in all directions, and all current gauge-changing mechanisms cannot meet their strength requirements. Summary of the invention

[0005] The invention provides a wheelset for a variable gauge bogie, which has good load-bearing effect and good reliability.

[0006] According to a first aspect of the present invention, there is provided a wheelset for a variable gauge bogie, comprising an axle, a wheel and an axle box assembly, wherein the axle passes through the wheel and the axle box assembly, and the axle box assembly comprises:

[0007] An axle box beam, wherein the inner wall of the axle box beam is provided with a plurality of locking cone grooves arranged along the axial direction of the axle;

[0008] An axle box front cover, arranged outside the shaft end of the axle and connected to the axle box beam;

[0009] An axle box body is arranged in the axle box beam, a locking cone is arranged on the outer wall of the axle box body, a limiting rib is arranged on one of the sides of the axle box body and the axle box front cover close to each other, and a limiting portion is arranged on the other side, and the limiting rib is used for limiting the position of the limiting portion;

[0010] A sliding mechanism is respectively provided through the axle box and the wheel;

[0011] Wherein, the sliding mechanism is configured to drive the wheel and the axle box to move along the axial direction of the axle, so that the locking cone is selectively engaged with one of the locking cone grooves to achieve switching between the unlocking mode and the locking mode for changing the track gauge of the wheel.

[0012] In some embodiments, it also includes:

[0013] A limit bearing, sleeved on the outside of the shaft end of the axle and arranged between the axle and the front cover of the axle box;

[0014] The shaft end pressure cover is arranged at the end of the axle, and the shaft end pressure cover and the axle box front cover are respectively abutted against the two ends of the limit bearing along the axial direction of the axle.

[0015] In some embodiments, a bearing mounting seat is provided in the front cover of the axle box, and the bearing mounting seat is an oblong hole structure. The bearing mounting seat is used to install the limit bearing, and the limit bearing is configured to move in the radial direction of the axle in the bearing mounting seat.

[0016] In some embodiments, a vertical rib is disposed on an inner wall of the bearing mounting seat, and the vertical rib abuts against an outer ring of the limit bearing to limit the limit bearing.

[0017] In some embodiments, the sliding mechanism includes:

[0018] A sliding sleeve is respectively provided through the axle box and the wheel;

[0019] A spline hub is disposed in the sliding sleeve, and the spline hub is sleeved on the outside of the axle and connected thereto;

[0020] A spline is arranged on the spline hub and between the spline hub and the sliding sleeve.

[0021] In some embodiments, the end surface of the spline hub is used to limit the position of the sliding sleeve; or the end surface of the spline is used to limit the position of the sliding sleeve.

[0022] In some embodiments, it also includes:

[0023] An axle box bearing is sleeved on the outside of the sliding sleeve and arranged between the sliding sleeve and the axle box body;

[0024] The bearing pressure cover is arranged at one end of the sliding sleeve close to the axle box front cover. The bearing pressure cover can abut against the axle box bearing and is used for limiting the axle box bearing.

[0025] In some embodiments, the sliding mechanism includes a needle roller assembly, and the needle roller assembly includes:

[0026] A needle roller cage is arranged between the axle and the sliding sleeve;

[0027] A needle roller body, arranged on the needle roller cage and between the needle roller cage and the sliding sleeve;

[0028] The limiting seat is sleeved on the outside of the axle and arranged between the axle and the needle roller retainer.

[0029] In some embodiments, it also includes:

[0030] A driven gear, sleeved on the axle and located between two wheels arranged opposite to each other;

[0031] The driving mechanism comprises an axle box and a driving source, wherein the axle box is sleeved on the axle, the driving source is arranged on the axle box, and a driving gear is arranged at the output end of the driving source, and the driving gear is meshed with the driven gear.

[0032] In some embodiments, the axle box beam is provided with an axial hole, and the locking cone groove is provided on the inner wall of the axial hole;

[0033] Wherein, along the radial direction of the axle, a movable gap is provided between the shaft hole and the shaft box body, and the shaft hole is provided with a vertical portion, and the vertical portion is used to limit the rotation of the shaft box body.

[0034] The embodiments of the present invention have the following advantages or beneficial effects:

[0035] The variable gauge bogie wheelset provided by the embodiment of the present invention has a locking cone groove in the axle box beam, the axle box body is arranged in the axle box beam, and the outer wall of the axle box body is provided with a locking cone, which is equivalent to locking the locking cone and the locking cone groove on the side where the axial beam and the axle box body are close to each other, so as to position and lock along the axial direction of the axle. Since the axle box beam can cooperate with the axle box body and the sliding mechanism to transmit the force along the axial direction of the axle, it can bear a relatively large load and can meet the strength use requirements of high-power and large axle-weight locomotives.

[0036] When the locomotive or vehicle is in operation, the locking cone is connected to the locking cone groove to transmit the force along the axial direction of the axle to ensure the load-bearing effect of the wheel; when the locomotive or vehicle gauge is switched, the sliding mechanism can drive the wheel to move along the axial direction of the axle to unlock the wheel. At this time, the locking cone is no longer connected to the locking cone groove, and the locking cone is separated from the locking cone groove, and the force along the axial direction of the axle cannot be transmitted, achieving the unloading effect of the wheel, and adapting to the needs of gauge changes without stopping to replace the bogie, reducing the manpower and material costs caused by replacing the bogie during cross-border transport, and improving operational efficiency.

[0037] The axle box front cover is arranged outside the shaft end of the axle, and the axle box front cover plays the role of encapsulating the end of the axle. The axle box front cover is connected to the axle box beam, and the axle box beam plays the role of fixing the axle box front cover. Through the cooperation of the limit rib and the limit part in the axle box body and the axle box front cover, when the inner distance of the wheel is too large, that is, when changing to a wider gauge, the limit rib and the limit part contact each other to achieve limitation, avoiding wheel slippage or locking due to excessive lateral displacement of the wheel during the gauge change process, thereby ensuring reliability and stability before and after the gauge change. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] In order to better understand the present disclosure, reference may be made to the embodiments shown in the following drawings. The components in the drawings are not necessarily to scale, and related elements may be omitted in order to emphasize and clearly illustrate the technical features of the present disclosure. In addition, related elements or components may have different settings as known in the art. In addition, in the drawings, the same reference numerals represent the same or similar components in each of the drawings. The above and other features and advantages of the present invention will become more apparent by describing in detail its exemplary embodiments with reference to the drawings.

[0039] in:

[0040] Figure 1 The structure diagram of a variable gauge bogie wheelset according to an embodiment of the present invention is shown;

[0041] Figure 2 The figure shows a partial cross-sectional view of a variable gauge bogie wheelset according to an embodiment of the present invention. Figure 1 ;

[0042] Figure 3 The figure shows a partial cross-sectional view of a variable gauge bogie wheelset according to an embodiment of the present invention. Figure 2 ;

[0043] Figure 4 The figure shows a schematic structural diagram of an axle used in a variable gauge bogie wheelset according to an embodiment of the present invention;

[0044] Figure 5The diagram shows a schematic structural diagram of a wheel in a wheelset for a variable gauge bogie according to an embodiment of the present invention;

[0045] Figure 6 The figure shows a schematic structural diagram of an axle box for a wheelset of a variable gauge bogie according to an embodiment of the present invention;

[0046] Figure 7 The figure shows a schematic structural diagram of a driven gear in a variable gauge bogie wheelset according to an embodiment of the present invention;

[0047] Figure 8 Shown is a cross-sectional view of a variable gauge bogie wheelset according to an embodiment of the present invention;

[0048] Fig. 9 The structure diagram of the axle box beam for a variable gauge bogie wheelset according to one embodiment of the present invention is shown;

[0049] Fig.10 The structure diagram of the axle box for a variable gauge bogie wheelset according to one embodiment of the present invention is shown;

[0050] Fig.11 The structure diagram of the centering limit bearing for a variable gauge bogie wheel set according to one embodiment of the present invention is shown;

[0051] Fig.12 The structure diagram of the axle end gland for a variable gauge bogie wheelset according to one embodiment of the present invention is shown;

[0052] Fig.13 The structure diagram of the front cover of the axle box used in the wheelset of a variable gauge bogie according to one embodiment of the present invention is shown;

[0053] Fig.14 The figure shows a schematic structural diagram of an end cover for a variable gauge bogie wheelset according to an embodiment of the present invention;

[0054] Fig.15 The structure of the sliding sleeve used in the wheel set of a variable gauge bogie according to an embodiment of the present invention is shown. Figure 1 ;

[0055] Fig.16 The structure of the sliding sleeve used in the wheel set of a variable gauge bogie according to an embodiment of the present invention is shown. Figure 2 ;

[0056] Fig.17 The structure diagram of a spline hub used in a variable gauge bogie wheelset according to an embodiment of the present invention is shown;

[0057] Fig.18 The structure diagram of the needle roller retainer and the needle roller body used in the wheel set of a variable gauge bogie according to an embodiment of the present invention is shown;

[0058] Fig.19 Shown is a schematic structural diagram of a centering stopper for a variable gauge bogie wheelset according to an embodiment of the present invention.

[0059] Fig. 20 The structure diagram of the axle box bearing for a variable gauge bogie wheelset according to one embodiment of the present invention is shown;

[0060] Fig.21 Shown is a schematic structural diagram of an axle end gland for a variable gauge bogie wheelset according to an embodiment of the present invention.

[0061] The reference numerals are described as follows:

[0062] 100, axle box assembly; 200, axle; 300, wheel; 400, driven gear; 500, axle box;

[0063] 1. Axle box beam; 101. Locking cone groove; 102. Axle hole; 103. Vertical portion; 104. First mounting interface; 105. Second mounting interface; 106. Third mounting interface;

[0064] 2. Axle box; 21. Locking cone; 22. Limiting part; 23. Vertical limiting edge;

[0065] 3. Sliding mechanism; 31. Sliding sleeve; 311. Wheel mounting interface; 312. Bearing mounting interface; 313. Spline groove; 314. Roller;

[0066] 32. Spline hub; 33. Spline; 34. Needle roller assembly; 341. Needle roller cage; 342. Needle roller body; 343. Limit seat;

[0067] 4. Axle box front cover; 41. Limit rib; 42. Bearing mounting seat; 421. Vertical rib;

[0068] 5. Limit bearing; 6. Shaft end pressure cover; 7. Axle box bearing; 8. Bearing pressure cover; 10. End cover. DETAILED DESCRIPTION

[0069] The following will be combined with the accompanying drawings in the exemplary embodiments of the present disclosure to clearly and completely describe the technical solutions in the exemplary embodiments of the present disclosure. The exemplary embodiments described herein are only for illustrative purposes and are not intended to limit the scope of protection of the present disclosure. Therefore, it should be understood that various modifications and changes can be made to the exemplary embodiments without departing from the scope of protection of the present disclosure.

[0070] In the description of the present disclosure, unless otherwise clearly specified and limited, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance; the term "plurality" refers to two or more; the term "and / or" includes any and all combinations of one or more associated listed items. In particular, reference to "the / the" object or "an" object is also intended to indicate one of a possible plurality of such objects.

[0071] Unless otherwise specified or explained, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, an integral connection, an electrical connection, or a signal connection; "connection" can be a direct connection or an indirect connection through an intermediate medium. For those skilled in the art, the specific meanings of the above terms in this disclosure can be understood according to specific circumstances.

[0072] Further, in the description of the present disclosure, it should be understood that the directional words such as "upper", "lower", "inner", "outer" and the like described in the exemplary embodiments of the present disclosure are described at the angles shown in the accompanying drawings and should not be understood as limitations on the exemplary embodiments of the present disclosure. It should also be understood that, in the context, when it is mentioned that an element or feature is connected to another element (one or more) "upper", "lower", or "inner", "outer", it can not only be directly connected to the other (one or more) elements "upper", "lower", "inner", "outer", but also can be indirectly connected to the other (one or more) elements "upper", "lower", "inner", "outer" through an intermediate element.

[0073] Example embodiments will now be described more fully with reference to the accompanying drawings. However, example embodiments can be implemented in a variety of forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that the present invention will be comprehensive and complete and fully convey the concepts of the example embodiments to those skilled in the art. The same reference numerals in the figures represent the same or similar structures, and thus their detailed description will be omitted.

[0074] This embodiment provides a wheelset for a variable gauge bogie, such as Figure 1-Figure 5 As shown, the variable gauge bogie wheelset includes an axle 200, a wheel 300 and an axle box assembly 100. The axle 200 passes through the wheel 300 and the axle box assembly 100. The axle box assembly 100 is used for changing the gauge of the wheel 300 along the axial direction of the axle 200 to achieve a change in the inner gauge of the wheelset.

[0075] It should be noted that there are two wheels 300, which are symmetrically arranged at both ends of the axle 200 and face each other. The wheels 300 can rotate on the rails to drive the locomotive forward. The two axle box assemblies 100 are symmetrically arranged at the shaft ends on both sides of the axle 200, do not occupy the space inside the wheels 300, save floor space, meet the structural layout requirements of the inner side of the powered wheelset, especially the wheels 300 of high-power heavy-load locomotives, and meet the track change requirements of the non-powered wheelset.

[0076] It should be particularly noted that the wheelset used for the variable gauge bogie adopts a wheelset with synchronously rotating axles, which overcomes the problems of poor automatic centering ability of independently rotating wheels 300, severe eccentric wear of wheel rims, and the need to design a guide mechanism, thereby extending the service life of the wheels 300.

[0077] In one embodiment, Figure 6-Figure 7 As shown, the variable gauge bogie wheelset also includes a driven gear 400 and a driving mechanism, wherein the driven gear 400 is sleeved on the axle 200 and located between two wheels 300 arranged opposite to each other. The driving mechanism includes an axle box 500 and a driving source, wherein the axle box 500 is sleeved on the axle 200, the driving source is arranged on the axle box 500, and a driving gear is arranged at the output end of the driving source, and the driving gear is meshed with the driven gear 400.

[0078] The driving mechanism is mounted on the axle 200, which bears the weight of the driving source and transmits torque. The axle box 500 is mounted on the axle 200, and the axle 200 fixes the axle box 500. The driving source is set on the axle box 500, and the axle box 500 provides an installation interface for the driving source, which plays a role of fixed support. The driving source is specifically a traction motor, and a driving gear is provided at the output end of the driving source. The driving gear is meshed with the driven gear 400. The driving source drives the driving gear to rotate and drives the driven gear 400 to rotate. Since the driven gear 400 is installed on the axle 200, the output torque of the driving source is transmitted and the wheel 300 is driven to rotate.

[0079] It is understandable that the space inside the wheel 300 can be used to arrange the driven gear 400 and the drive mechanism, etc., and can also be used to arrange the axle disc brake device of the unpowered wheelset, etc. The space layout is reasonable and the space utilization rate is high. It solves the problem of tight structure inside the powered wheelset and can also meet the demand for track change on the basis of the existing locomotive motor suspension method. Since the axle box assembly 100 is arranged on the outside of the wheel 300, the axle box assembly 100 serves as a track change structure and does not interfere with the space inside the wheel 300, so it can adapt to the track change requirements of different suspension methods. By arranging the axle box assembly 100 on the outside of the wheel 300, the needs of powered and unpowered wheelsets are met, and the structural layout requirements of high-power, high-torque and heavy-load locomotive wheelsets are met.

[0080] It is understandable that the most critical link in the gauge change of rail transit locomotives or vehicles is the switching of the inner side gauge of the wheelset. The axle box assembly 100 is one of the most core components for the wheelset of the variable gauge bogie to realize the switching of the inner side gauge of the wheelset and ensure the accuracy of the gauge change. The axle box assembly 100 can solve the problem that the different gauges of railways in various countries hinder cross-border railway transportation, that is, by adjusting the inner side gauge of the wheel 300, it can adapt to the gauge of railways in other countries.

[0081] The existing variable gauge locomotive wheelsets can generally only be adapted to EMUs or passenger locomotives with smaller axle weights and traction. Since high-power, high-axle-weight locomotives have very large loads in all directions, they cannot meet the strength requirements of high-power, high-axle-weight locomotives due to their very large loads in all directions.

[0082] To solve this problem, Figure 8 As shown, the axle box assembly 100 provided in this embodiment includes an axle box beam 1, an axle box front cover 4, an axle box body 2 and a sliding mechanism 3. The inner wall of the axle box beam 1 is provided with a plurality of locking cone grooves 101 arranged along the axial direction of the axle 200. The axle box front cover 4 is arranged outside the shaft end of the axle 200 and connected to the axle box beam 1. The axle box body 2 is arranged in the axle box beam 1, and the outer wall of the axle box body 2 is provided with a locking cone 21. One of the sides of the axle box body 2 and the axle box front cover 4 close to each other is provided with a limiting rib 41, and the other is provided with a limiting portion 22. The limiting rib 41 is used to limit the limiting portion 22. The sliding mechanism 3 is respectively penetrated through the axle box body 2 and the wheel 300. Among them, the sliding mechanism 3 is configured to drive the wheel 300 and the axle box 2 to move along the axial direction of the axle 200, so that the locking cone 21 is selectively engaged with one of the locking cone grooves 101 to switch between the unlocking mode and the locking mode for the wheel 300 to change the track gauge.

[0083] The variable gauge bogie wheelset provided in this embodiment has a locking cone groove 101 arranged in the axle box beam 1, the axle box body 2 is arranged in the axle box beam 1, and the outer wall of the axle box body 2 is provided with a locking cone 21, which is equivalent to locking the locking cone 21 and the locking cone groove 101 on the side where the axial beam and the axle box body 2 are close to each other, so as to position and lock along the axial direction of the axle 200. Since the axle box beam 1 can cooperate with the axle box body 2 and the sliding mechanism 3 to transmit the force along the axial direction of the axle 200, it can bear a relatively large load and can meet the strength use requirements of high-power and large axle-weight locomotives.

[0084] When the locomotive or vehicle is in operation, the locking cone 21 is engaged with the locking cone groove 101 to transmit the force in the axial direction of the axle 200 to ensure the load-bearing effect of the wheel 300; when the locomotive or vehicle gauge is switched, the sliding mechanism 3 can drive the wheel 300 to move in the axial direction of the axle 200 to unlock the wheel 300. At this time, the locking cone 21 is no longer engaged with the locking cone groove 101, and the locking cone 21 is separated from the locking cone groove 101, and the force in the axial direction of the axle 200 cannot be transmitted, so as to achieve the unloading effect of the wheel 300, so as to adapt to the change of gauge without stopping to replace the bogie, reduce the manpower and material costs caused by replacing the bogie during cross-border transport, and improve the operation efficiency.

[0085] It can be understood that the number of locking cone grooves 101 matches and adapts to the number of track gauges. Specifically, if the number of track gauges is two, the number of locking cone grooves 101 is also two. The two track gauges can be respectively called wide track gauge and narrow track gauge. When the track gauge is wide, the locking cone 21 is engaged with the locking cone groove 101 located on the outside; when the track gauge is narrow, the locking cone 21 is engaged with the locking cone groove 101 located on the inside.

[0086] Since the existing gauge change mechanism is generally equipped with a complex unlocking or locking device, when passing through the ground gauge change device, the unlocking and locking can only be completed by cooperating with the unlocking and locking tracks on the ground gauge change device. The structure is complex, the track change process is cumbersome, the reliability is poor, and locking and unlocking cannot be performed frequently. The requirements for the ground gauge change device are high, which has become a restrictive factor hindering the development of gauge change trains.

[0087] Therefore, the axle box assembly 100 provided in this embodiment simplifies the track changing process into three processes: wheel 300 unloading and unlocking, track gauge switching, and wheel 300 load-bearing and locking. This is equivalent to the wheel 300 unlocking and the wheel 300 unloading process being carried out and completed simultaneously, and the wheel 300 locking and the wheel 300 load-bearing process being carried out and completed simultaneously. In the entire track changing process, there is no need for the ground axle box assembly 100 to arrange unlocking rails and locking rails, and the complicated unlocking and locking procedures in the track gauge changing process are eliminated, thereby simplifying the track changing process and saving the design and manufacturing costs of the ground axle box assembly 100.

[0088] During the gauge change process, the wheel 300 may shift too much, causing the wheel 300 to slip or become difficult to lock. Figure 8 As shown, the axle box assembly 100 provided in this embodiment also includes an axle box front cover 4, which is arranged outside the axial end of the axle 200 and connected to the axle box beam 1, and one of the sides of the axle box body 2 and the axle box front cover 4 that are close to each other is provided with a limiting rib 41, and the other is provided with a limiting portion 22, and the limiting rib 41 is used to limit the limiting portion 22.

[0089] The axle box front cover 4 is arranged on the outside of the shaft end of the axle 200, and the axle box front cover 4 serves to encapsulate the end of the axle 200. The axle box front cover 4 is connected to the axle box beam 1, and the axle box beam 1 serves to fix the axle box front cover 4. Through the cooperation of the limit rib 41 and the limit part 22 in the axle box body 2 and the axle box front cover 4, when the inner side distance of the wheel 300 is too large, that is, when changing to a wide gauge, the limit rib 41 and the limit part 22 contact each other to achieve limitation, thereby avoiding the wheel 300 from slipping or locking due to excessive lateral displacement of the wheel 300 during the gauge change process, thereby ensuring reliability and stability before and after the gauge change.

[0090] It should be noted that a limiting rib 41 is provided on the side of the axle box front cover 4 close to the axle box body 2, and an end cover bolt is provided on the side of the axle box body 2 close to the axle box front cover 4, and the end cover bolt is the limiting portion 22. Among them, the setting position and specific structure of the limiting rib 41 and the limiting portion 22 can be adjusted according to actual production conditions, as long as the limiting along the axial direction of the axle 200 can be achieved, it is within the protection scope of this embodiment.

[0091] In one embodiment, Figure 8 and Fig. 9 As shown, the axle box beam 1 is one of the main load-bearing components for the variable gauge bogie wheelset, mainly bearing the locomotive load and transmitting the lateral force. A locking cone groove 101 is provided on the inner ring of the axle box beam 1, and the locking cone groove 101 is clamped to the locking cone 21 of the axle box body 2 to achieve locking and fixing between the axle box beam 1 and the axle box body 2.

[0092] Among them, the locking cone groove 101 and the locking cone 21 are conical structures. Under the cooperation of the locking cone groove 101 and the locking cone 21, the positioning function between the axle box beam 1 and the axle box body 2 along the axial direction of the axle 200 is realized, and the axial force is transmitted during the operation of the locomotive or vehicle.

[0093] It should be noted that a first mounting interface 104 and a second mounting interface 105 are provided on the outside of the axle box beam 1. The first mounting interface 104 is used to install a series of suspension devices, and the second mounting interface 105 is used to install the axle box tie rod. The first mounting interface 104 can be adjusted according to the vehicle parameters and application requirements of the locomotive or vehicle. Double-sided spring seats can be arranged, and the spring seats can also be arranged on the top of the axle box beam 1 to form a swing arm axle box. A third mounting interface 106 can also be provided on the outside of the axle box beam 1. The third mounting interface 106 is used to install a series of vertical shock absorbers, and a series of vertical shock absorbers can also be arranged on the axle box front cover 4. The structural adjustment is flexible and diverse, and various axle box types currently on the market can be replaced.

[0094] In one embodiment, Figure 8 and Fig. 9 As shown, the axle box beam 1 is provided with an axle hole 102, and the locking cone groove 101 is provided on the inner wall of the axle hole 102. In the radial direction of the axle 200, a movable gap is provided between the axle hole 102 and the axle box body 2.

[0095] The axle box beam 1 is provided with an axial hole 102, which is used to accommodate the axle box body 2, so as to provide an installation position for the axle box body 2. An active gap is provided between the axial hole 102 and the axle box body 2 in the radial direction of the axle 200, so as to provide a movable activity space for the axle box body 2. Specifically, when the axle box body 2 moves along the radial direction of the axle 200 and in a direction away from the locking cone groove 101, the locking cone 21 and the locking cone groove 101 are separated from each other to realize the unloading process of the wheel 300; when the axle box body 2 moves along the radial direction of the axle 200 and in a direction close to the locking cone groove 101, the locking cone 21 and the locking cone groove 101 are engaged with each other to realize the load-bearing process of the wheel 300.

[0096] In one embodiment, Figure 8 and Figure 8 As shown, the shaft hole 102 is provided with a vertical portion 103, and the vertical portion 103 is used to limit the rotation of the shaft box body 2.

[0097] A vertical portion 103 is provided through the shaft hole 102. The shaft hole 102 is not a circular hole structure, but is similar to an oblong hole or a waist-shaped hole structure. The vertical portion 103 can also be called a vertical stop edge or a force transmission limit stop edge, which mainly has the following functions: First, the vertical portion 103 plays a limiting role to prevent relative rotation between the axle box beam 1 and the axle box body 2; second, after the wheel 300 is unlocked, it ensures that the axle box body 2 does not rotate, so that the locking cone 21 and the corresponding locking cone groove 101 will not cause the axle box assembly 100 to fail due to phase changes, so as to ensure the reliability of the axle box assembly 100; third, during the operation of the locomotive or vehicle, the vertical portion 103 is used to transmit the force in the radial direction of the axle 200.

[0098] In one embodiment, Figure 8 and Fig.10 As shown, the axle box 2 is the main load-bearing component for the variable gauge bogie wheelset, and is a key component for bearing the locomotive load and transmitting the lateral force. A locking cone 21 is provided on the upper part of the axle box 2. The locking cone 21 and the locking cone groove 101 of the axle box beam 1 cooperate with each other to transmit the force in the axial direction of the axle 200. There is a blocking portion on the outside of the axle box 2 that cooperates with the vertical portion 103 of the axle box beam 1, which is used to transmit the force in the radial direction of the axle 200.

[0099] It should be noted that a vertical limiting edge 23 is also provided on the outer wall of the axle box body 2, and the vertical limiting edge 23 cooperates with the vertical portion 103 inside the axle box beam 1 to prevent failure of the track changing process and ensure the reliability of the track changing process.

[0100] In one embodiment, Figure 8 and Figure 11-Figure 12 As shown, the variable gauge bogie wheelset also includes a limit bearing 5 and an axle end pressure cover 6. The limit bearing 5 is sleeved on the outside of the axle end of the axle 200 and is arranged between the axle 200 and the axle box front cover 4. The axle end pressure cover 6 is arranged at the end of the axle 200. The axle end pressure cover 6 and the axle box front cover 4 are respectively abutted against the two ends of the limit bearing 5 along the axial direction of the axle 200.

[0101] Among them, the limit bearing 5 is specifically a tapered roller bearing, and the number of the limit bearings 5 ​​is two, that is, two tapered roller bearings are installed on the shaft end of the axle 200. The limit bearing 5 is set between the axle 200 and the axle box front cover 4, and the axle box front cover 4 plays the role of installing the limit bearing 5, and the two ends of the limit bearing 5 along the axial direction of the axle 200 are respectively abutted by the shaft end pressure cover 6 and the axle box front cover 4. Under the pressing action of the shaft end pressure cover 6 and the axle box front cover 4, the limit of the limit bearing 5 is achieved, so that the force of the axle box assembly 100 on one side along the axial direction of the axle 200 is transmitted to the axle box assembly 100 on the other side through the axle 200, thereby ensuring that the inner distance of the wheelset remains unchanged during the operation of the locomotive. This mechanical structure is used to ensure the accuracy of the track change position, thereby achieving the accuracy and reliability of the track change process.

[0102] It should be particularly noted that the shaft end pressure cover 6 and the axle 200 can be connected by bolts, that is, the bolts are respectively penetrated through the shaft end pressure cover 6 and the axle 200.

[0103] In one embodiment, Figure 8 and Fig.13 As shown, a bearing mounting seat 42 is provided in the front cover 4 of the axle box. The bearing mounting seat 42 is an oblong hole structure. The bearing mounting seat 42 is used to install a limit bearing 5. The limit bearing 5 is configured to move in the bearing mounting seat 42 along the radial direction of the axle 200.

[0104] A bearing mounting seat 42 is provided in the axle box front cover 4, and the bearing mounting seat 42 serves to mount the limit bearing 5. Since the locking cone 21 and the locking cone groove 101 need to drive the limit bearing 5 to move during the unlocking and locking process of the axle 200, the bearing mounting seat 42 is an oblong hole structure, and the oblong hole structure provides the limit bearing 5 with a movable space along the radial direction of the axle 200.

[0105] In one embodiment, a vertical rib 421 is disposed on the inner wall of the bearing mounting seat 42, and the vertical rib 421 abuts against the outer ring of the limit bearing 5 to limit the limit bearing 5. When the limit bearing 5 moves up and down along the radial direction of the axle 200, the vertical rib 421 on the inner wall of the bearing mounting seat 42 is always in contact with the outer ring of the limit bearing 5, playing the role of limiting and stopping.

[0106] In one embodiment, Figure 8 and Fig.14 As shown, the variable gauge bogie wheelset also includes an end cover 10, which is arranged outside the end of the axle 200 and connected to the axle box front cover 4 to play a protective role. The end cover 10 and the axle box front cover 4 can be connected by bolts.

[0107] It should be particularly noted that a first end cover mounting interface is provided on the end surface of the end cover 10 , and the first end cover mounting interface is used to install a grounding device or a shaft end speed sensor.

[0108] In one embodiment, Figure 8 and Figure 15-17 As shown, the sliding mechanism 3 includes a sliding sleeve 31, a spline hub 32 and a spline 33. The sliding sleeve 31 is respectively inserted into the axle box 2 and the wheel 300. The spline hub 32 is arranged in the sliding sleeve 31. The spline hub 32 is sleeved on the outside of the axle 200 and connected thereto. The spline 33 is arranged on the spline hub 32 and between the spline hub 32 and the sliding sleeve 31.

[0109] Among them, the sliding sleeve 31 is the main sliding and torque transmission mechanism. The sliding sleeve 31 is inserted into the wheel 300. The sliding sleeve 31 can drive the wheel 300 to move along the axial direction of the axle 200 to realize the track change process of the wheel 300. Specifically, a wheel mounting interface 311 is arranged on the outside of the sliding sleeve 31. The wheel mounting interface 311 is used to install the wheel 300. The spline hub 32 is sleeved on the outside of the axle 200 and arranged in the sliding sleeve 31. The spline hub 32 plays the role of bearing the spline 33. The spline hub 32 and the axle 200 are interference fit to ensure the fixing effect between the spline hub 32 and the axle 200. A spline groove 313 is arranged inside the spline hub 32. The spline groove 313 is used to accommodate the spline 33. The spline 33 is arranged between the spline hub 32 and the sliding sleeve 31. The spline 33 plays the role of transmitting torque during normal operation and also ensures the smoothness of sliding during the track change process.

[0110] It should be noted that the spline hub 32 needs to undergo special processing to ensure that the spline hub 32 meets the strength requirements. At this time, the axle 200 does not need to be specially strengthened. The processing technology is exactly the same as the processing technology of the existing locomotive axle 200, and the spline hub 32 can be replaced in time according to the usage. The replacement cost is low and there is no need to replace the axle 200. The axle 200 can be used throughout its entire life cycle.

[0111] It should be particularly noted that the spline 33 can be replaced by various spline forms such as involute splines, rectangular splines, etc., and can be an integral structure with the sliding sleeve 31 as needed, and cooperate with the spline hub 32 to transmit torque, or the spline 33 can be made into one piece with the spline hub 32 and cooperate with the sliding sleeve 31 to transmit torque.

[0112] In one embodiment, the end surface of the spline hub 32 is used to limit the position of the sliding sleeve 31 ; or, the end surface of the spline 33 is used to limit the position of the sliding sleeve 31 .

[0113] It should be noted that when the inner gauge of the wheel 300 decreases too much, the sliding sleeve 31 contacts the end face of the spline hub 32 to achieve the limit function, or the sliding sleeve 31 contacts the end face of the spline 33 to achieve the limit function. This mechanical limit method is used to avoid the situation where the gauge change of the wheel 300 is small during the gauge change process, making the track change process more accurate and reliable.

[0114] In one embodiment, Figure 8 and Fig.18 As shown, the sliding mechanism 3 further includes a needle roller assembly 34, which includes a needle roller retainer 341 and a needle roller body 342. The needle roller retainer 341 is arranged between the axle 200 and the sliding sleeve 31. The needle roller body 342 is arranged on the needle roller retainer 341 and between the needle roller retainer 341 and the sliding sleeve 31.

[0115] It can be understood that the needle roller retainer 341 and the needle roller body 342 are the main components between the wheel 300 and the axle 200 that bear the load in the radial direction of the axle 200, such as the mass of each suspension system, the vertical impact force of the wheel and rail, etc. The needle roller retainer 341 is arranged between the axle 200 and the sliding sleeve 31, and the needle roller retainer 341 provides a bearing position for the needle roller body 342. Accordingly, a raceway 314 is arranged inside the sliding sleeve 31 to provide a accommodating space for the needle roller body 342. Under the mutual cooperation of the needle roller retainer 341 and the needle roller body 342, when the track gauge is switched, it can move along the axial direction of the axle 200 with the wheel 300, ensuring that the center of the needle roller retainer 341 always coincides with the rolling circle of the wheel 300 tread, so that the entire needle roller assembly 34 is not overloaded, and there is no jamming when the wheel 300 slides, further ensuring the smoothness of the sliding mechanism 3 during the track change process.

[0116] It should be particularly noted that the needle roller assembly 34 bears the load in the radial direction of the axle 200. Compared with sliding bearings, it has a strong load-bearing capacity and occupies less space. The risk of the wheel 300 getting stuck during the track change process is reduced, thereby improving the reliability of the track change. However, according to the requirements of the technical solution, in some other embodiments, the needle roller assembly 34 can also be replaced by a sliding bearing.

[0117] It should be noted that, in some other embodiments, the needle roller assembly 34 can also be replaced by a needle roller bearing or a sliding bearing.

[0118] In one embodiment, Figure 8 and Fig.19 As shown, the needle roller assembly 34 also includes a limit seat 343, which is sleeved on the outside of the axle 200 and arranged between the axle 200 and the needle roller retainer 341. The limit seat 343 is mainly used to bear the load transmitted by the needle roller assembly 34 along the radial direction of the axle 200. One side end face of the limit seat 343 can play a limiting role when the track gauge changes, and the other side end face can be used to limit the sealing ring of the locomotive axle box 500.

[0119] In one embodiment, Figure 8 and Fig. 20 As shown, the variable gauge bogie wheelset also includes an axle box bearing 7. A mounting hole is provided inside the axle box body 2. The axle box bearing 7 is arranged in the mounting hole. The mounting hole provides a mounting position for the axle box bearing 7. The axle box bearing 7 is sleeved on the outside of the sliding sleeve 31 and is arranged between the sliding sleeve 31 and the axle box body 2. The axle box bearing 7 ensures the smooth rotation of the axle 200 during the normal operation of the locomotive.

[0120] It should be noted that the axle box bearing 7 is an integral maintenance-free fully sealed tapered roller bearing, and may also be a double-row cylindrical roller bearing, or other bearings that play the same load-bearing role.

[0121] It should be particularly noted that a bearing mounting interface 312 is provided on the outside of the sliding sleeve 31, and the bearing mounting interface 312 is used to install the axle box bearing 7. The axle box bearing 7 is interference-pressed on the bearing mounting interface 312 of the sliding sleeve 31, and is used to transmit the force along the axial direction of the axle 200 and the force along the radial direction of the axle 200, to ensure that the axle box body 2 does not rotate with the rotation of the axle 200.

[0122] It should be noted that the position of the axle box bearing 7 of the axle box assembly 100 remains unchanged when the track gauge changes, and the center line of the axle box bearing 7 always coincides with the load-bearing center of the axle box body 2 and the axle box beam 1, and there is no unbalanced load under various track gauges, thereby ensuring the life and reliability of the axle box bearing 7. In addition, the selection of the axle box bearing 7 is relatively easy, and the axle box bearing 7 of the existing locomotive or vehicle can be selected, without the need for redevelopment, and local materials can be used to save production costs.

[0123] In one embodiment, Figure 8 and Fig.21 As shown, the variable gauge bogie wheelset further includes a bearing cover 8, which is disposed at one end of the sliding sleeve 31 close to the axle box front cover 4, and can abut against the axle box bearing 7 to limit the position of the axle box bearing 7. The bearing cover 8 is used to press and limit the end of the axle box bearing 7, while ensuring that the axle box bearing 7 can move with the movement of the sliding sleeve 31.

[0124] In one embodiment, the wheelset for the variable gauge bogie also includes a load-bearing shoe, which is arranged at the lower part of the axle box beam 1. The load-bearing shoe and the axle box beam 1 are fastened together by bolts. The main function of the load-bearing shoe is to bear the load in the radial direction of the axle 200 when the locomotive or vehicle changes its gauge.

[0125] It should be noted that the load-bearing shoe can be structurally adjusted and replaced according to the interface requirements of the ground track change device.

[0126] The working process of the variable gauge bogie wheelset provided in this embodiment is as follows:

[0127] 1. After the locomotive or vehicle enters the unloading area of ​​the ground track changing device, the bearing shoe arranged at the bottom of the axle box beam 1 contacts the bearing rail of the ground track changing device, and the wheel 300 gradually sinks along the sinking rail of the ground track changing device. All components used for the track gauge bogie wheelset except the axle box beam 1 sink together with the wheel 300. At this time, the locking cone groove 101 of the axle box beam 1 and the locking cone 21 of the axle box body 2 are gradually disengaged until the axle box body 2 contacts the lower semicircular arc of the inner circle of the axle box beam 1, that is, the unloading is completed. At this time, the bearing shoe at the bottom of the axle box beam 1 bears all the loads on the vehicle, and the wheel 300 is completely unloaded. The locking cone groove 101 of the axle box beam 1 is completely disengaged from the locking cone 21 of the axle box body 2, that is, the wheel 300 is unlocked while unloading.

[0128] 2. When the locomotive or vehicle reaches the track change area, the wheel 300 is moved laterally to the fixed track gauge by the guide rail, and the sliding sleeve 31 drives the axle box bearing 7, the axle box body 2 and the wheel 300 to move synchronously, and the locking cone 21 of the axle box body 2 moves to the locking cone groove 101 in the axle box beam 1 corresponding to the track gauge;

[0129] In order to prevent the wheel 300 from slipping or becoming difficult to lock due to excessive lateral displacement of the wheel 300 during the track gauge change process, the present invention has a mechanical limiting function, that is, when the inner side distance of the wheel 300 increases too much, the limiting portion 22 of the axle box body 2 and the limiting rib 41 of the axle box front cover 4 contact to achieve limiting; when the inner side distance of the wheel 300 decreases too much, the end face of the spline hub 32 contacts the sliding sleeve 31, or the end face of the spline 33 contacts the sliding sleeve 31 to achieve limiting.

[0130] 3. When the locomotive or vehicle reaches the loading area, the tread of the wheel 300 begins to move upward along the rising rail of the ground track changing device. When the locomotive inertia causes the load-bearing shoe to disengage from the load-bearing rail, the wheel 300 rises and gradually carries the load until the locking cone 21 of the axle box body 2 is completely embedded in the locking cone groove 101 in the axle box beam 1 corresponding to the track gauge. When the wheel 300 is loaded, the locking of the wheel 300 is also completed synchronously.

[0131] It should be noted that the wheelset for a variable gauge bogie shown in the drawings and described in this specification is only an example of the principle of the present invention. It should be clearly understood by those skilled in the art that the principle of the present invention is not limited to any details or any components of the device shown in the drawings or described in the specification.

[0132] It should be understood that the present invention is not limited in its application to the detailed structure and arrangement of the components proposed in this specification. The present invention can have other embodiments and can be implemented and executed in a variety of ways. The aforementioned variations and modifications fall within the scope of the present invention. It should be understood that the present invention disclosed and defined in this specification extends to all alternative combinations of two or more individual features mentioned or evident in the text and / or the drawings. All these different combinations constitute multiple alternative aspects of the present invention. The embodiments described in this specification illustrate the best mode known for implementing the present invention and will enable those skilled in the art to utilize the present invention.

[0133] Those skilled in the art will readily appreciate other embodiments of the present disclosure after considering the specification and practicing the inventions disclosed herein. The present disclosure is intended to cover any variations, uses, or adaptations of the present invention that follow the general principles of the present disclosure and include common knowledge or customary techniques in the art that are not disclosed in the present disclosure. The specification and example embodiments are to be considered exemplary only, and the true scope and spirit of the present disclosure are indicated by the appended claims.

[0134] It should be understood that the present disclosure is not limited to the precise structures that have been described above and shown in the drawings, and that various modifications and changes may be made without departing from its scope. The scope of protection of the present disclosure is limited only by the appended claims.

Claims

1. A wheel set for a variable gauge bogie, comprising an axle (200), a wheel (300) and an axle box assembly (100), wherein the axle (200) is inserted through the wheel (300) and the axle box assembly (100), and characterized in that: The axle box assembly (100) comprises: An axle box beam (1), wherein the inner wall of the axle box beam (1) is provided with a plurality of locking cone grooves (101) arranged along the axial direction of the axle (200); An axle box front cover (4) is arranged outside the shaft end of the axle (200) and connected to the axle box beam (1); An axle box body (2) is arranged in the axle box beam (1), the outer wall of the axle box body (2) is provided with a locking cone (21), one of the sides of the axle box body (2) and the axle box front cover (4) close to each other is provided with a limiting rib (41), and the other is provided with a limiting portion (22), the limiting rib (41) is used for limiting the position of the limiting portion (22); A sliding mechanism (3) is respectively disposed through the axle box (2) and the wheel (300); A limit bearing (5) is sleeved on the outside of the shaft end of the axle (200) and is arranged between the axle (200) and the axle box front cover (4); The sliding mechanism (3) is configured to drive the wheel (300) and the axle box (2) to move along the axial direction of the axle (200), so that the locking cone (21) is selectively engaged with one of the locking cone grooves (101) to achieve switching between an unlocking mode and a locking mode, which is used for the wheel (300) to change the track gauge; A bearing mounting seat (42) is arranged inside the axle box front cover (4), and a vertical rib (421) is arranged on the inner wall of the bearing mounting seat (42), and the vertical rib (421) abuts against the outer ring of the limit bearing (5) to limit the position of the limit bearing (5); The sliding mechanism (3) comprises: A sliding sleeve (31) is respectively inserted into the axle box (2) and the wheel (300); A spline hub (32) is disposed in the sliding sleeve (31), and the spline hub (32) is sleeved on the outside of the axle (200) and connected thereto; A spline (33) is arranged on the spline hub (32) and between the spline hub (32) and the sliding sleeve (31); The end surface of the spline hub (32) is used to limit the position of the sliding sleeve (31); or, The end surface of the spline (33) is used to limit the position of the sliding sleeve (31).

2. The wheel set for a variable gauge bogie according to claim 1, characterized in that: Also includes: The shaft end pressure cover (6) is arranged at the end of the axle (200), and the shaft end pressure cover (6) and the axle box front cover (4) are respectively abutted against the two ends of the limit bearing (5) along the axial direction of the axle (200).

3. The wheel set for a variable gauge bogie according to claim 2, characterized in that: The bearing mounting seat (42) is an oblong hole structure, and the bearing mounting seat (42) is used to mount the limit bearing (5). The limit bearing (5) is configured to move in the radial direction of the axle (200) within the bearing mounting seat (42).

4. The wheel set for a variable gauge bogie according to claim 1, characterized in that: Also includes: An axle box bearing (7) is sleeved on the outside of the sliding sleeve (31) and is arranged between the sliding sleeve (31) and the axle box body (2); A bearing pressure cover (8) is arranged at one end of the sliding sleeve (31) close to the axle box front cover (4), and the bearing pressure cover (8) can abut against the axle box bearing (7) to limit the position of the axle box bearing (7).

5. The wheel set for a variable gauge bogie according to claim 4, characterized in that: The sliding mechanism (3) comprises a needle roller assembly (34), and the needle roller assembly (34) comprises: A needle roller cage (341) is arranged between the axle (200) and the sliding sleeve (31); A needle roller body (342) is arranged on the needle roller retainer (341) and between the needle roller retainer (341) and the sliding sleeve (31); A limiting seat (343) is sleeved on the outside of the axle (200) and is arranged between the axle (200) and the needle roller retainer (341).

6. The wheel set for a variable gauge bogie according to claim 1, characterized in that: Also includes: A driven gear (400) is sleeved on the axle (200) and is located between two wheels (300) that are arranged opposite to each other; The driving mechanism comprises an axle-holding box (500) and a driving source, wherein the axle-holding box (500) is sleeved on the axle (200), the driving source is arranged on the axle-holding box (500), and a driving gear is arranged at the output end of the driving source, and the driving gear is meshed with the driven gear (400).

7. The wheel set for a variable gauge bogie according to any one of claims 1 to 6, characterized in that: The axle box beam (1) is provided with an axial hole (102), and the locking cone groove (101) is provided on the inner wall of the axial hole (102); Wherein, along the radial direction of the axle (200), a movable gap is provided between the shaft hole (102) and the shaft box body (2), and the shaft hole (102) is provided with a vertical portion (103), and the vertical portion (103) is used to limit the rotation of the shaft box body (2).

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