Wheel tread structure suitable for UIC60 rail, wheel, steering system and vehicle

Abstract

The invention provides a wheel tread structure suitable for a UIC60 rail, a wheel, a steering system and a vehicle, the wheel tread structure comprises a rim area, a high-taper area, a constant working area, a low-taper area and a chamfer area, all the areas are continuously and smoothly connected in a tangent mode, opposite arc-shaped surfaces are arranged between the rim area and the high-taper area, and the arc-shaped surfaces are arranged between the rim area and the high-taper area. A wheel rolling circle position is arranged in the normal working area, and a horizontal straight line penetrating through the rolling circle position is a tread horizontal datum line; the wheel flange area comprises at least two arc-shaped sections and two linear sections, the arc-shaped sections and the linear sections are connected end to end and are continuously and smoothly connected in a tangent mode, and the arc-shaped sections are bent in the same direction. The wheel tread structure can meet the line conditions that the inner side distance of a vehicle wheel pair is 1353 mm, the gauge is 1435 mm, the rail cant is 1: 20 and the UIC60 rail, wheel rails can have a good contact relation, wheel rail contact points are reasonably distributed, it is guaranteed that the wheels and the steel rails are evenly abraded, and the contact points are distributed dispersedly in the range of a high contact stress area.

Description

Technical Field

[0001] The present invention relates to the technical field of rail vehicles, and in particular to a wheel tread structure, a wheel, a steering system and a vehicle suitable for UIC60 rails. Background Art

[0002] In the field of rail transit, the wheel-rail relationship has always been a hot topic for domestic and foreign scholars. The wheel-rail relationship directly affects the safety, stability and passenger comfort of vehicle operation. Due to the multi-degree-of-freedom coupling relationship between the vehicle and the track, the selection of wheel tread is usually closely related to the cross-sectional shape of the track, the rail bottom slope, and the inner distance of the wheelset.

[0003] At present, the tracks for passenger trains in my country usually adopt CN50, CN60, CN75 and other rails with a rail bottom slope of 1:40, while the outer contour styles of foreign rails are different, and the rail bottom slope is also different from that in China. As one of the European standard rails, UIC60 rail is often used in international high-speed railways and heavy-load freight railway lines due to its high strength and heavy weight. For the line conditions of standard track gauge 1435mm, rail bottom slope 1:20, and UIC60 rail, there is no wheel tread structure that is suitable for the line conditions based on the inner distance of the vehicle wheelset of 1353mm. The matching between the wheel and the track directly affects the vehicle dynamics performance. Therefore, in order to cope with overseas export projects, based on the line conditions of foreign UIC60 rails, 1:20 rail bottom slope, and 1435mm standard track gauge, a wheel tread with high stability and strong curve passing ability needs to be designed on the basis of the inner distance of the vehicle wheelset of 1353mm. Summary of the invention

[0004] According to the technical problems raised above, a wheel tread structure, a wheel, a steering system and a vehicle suitable for UIC60 rail are provided.

[0005] The technical means adopted by the present invention are as follows:

[0006] A wheel tread structure suitable for UIC60 rails, comprising: a wheel flange area, a high taper area, a normal working area, a low taper area and a chamfer area connected in sequence, wherein the areas are continuously and smoothly connected in a tangential manner, wherein the wheel flange area and the high taper area have opposite arc surfaces, wherein the normal working area has a wheel rolling circle position, and a horizontal straight line passing through the rolling circle position is a tread horizontal reference line;

[0007] The wheel rim area includes at least two arc segments and two straight segments, each segment is connected end to end and is continuously and smoothly connected in a tangential manner, and each arc segment is bent in the same direction.

[0008] Furthermore, the rim area includes a first straight line segment of the rim area, a first arc segment of the rim area, a second arc segment of the rim area and a second straight line segment of the rim area which are smoothly connected in sequence from beginning to end, and the tail end of the second straight line segment of the rim area is smoothly connected to the high taper area.

[0009] Furthermore, the radius R1 of the first arc segment of the wheel rim region satisfies 9mm≤R1≤11mm; the radius R2 of the second arc segment of the wheel rim region satisfies 17mm≤R2≤19mm;

[0010] The distance between the highest point E3 of the wheel rim area and the horizontal reference line of the tread is 31.2 mm;

[0011] The tread horizontal reference line is translated 10 mm to the outside of the wheel tread and intersects with the tread contour line at point K. The horizontal distance between point K and the starting point E1 of the rim area is the rim thickness, which is 30.8246 mm.

[0012] Further, the high-taper region includes a first arc segment of the high-taper region and a second arc segment of the high-taper region which are connected end to end and smoothly connected in a tangential manner, the starting end of the first arc segment of the high-taper region is smoothly connected to the rim region, the tail end of the second arc segment of the high-taper region is smoothly connected to the normal working region, and the first arc segment of the high-taper region and the second arc segment of the high-taper region are bent in the same direction;

[0013] The radius R3 of the first arc segment in the high-taper area satisfies 14mm≤R3≤16mm; the radius R4 of the second arc segment in the high-taper area satisfies 24mm≤R4≤26mm.

[0014] Further, the normal working area comprises a first arc segment of the normal working area, a second arc segment of the normal working area and a straight segment of the normal working area which are connected end to end and smoothly connected in a tangential manner, the starting end of the first arc segment of the normal working area is smoothly connected to the high taper area, the tail end of the straight segment of the normal working area is smoothly connected to the low taper area, and the first arc segment of the normal working area and the second arc segment of the normal working area are bent in the same direction;

[0015] The radius R5 of the first arc segment in the normal working area satisfies 116mm≤R5≤124mm; the radius R6 of the second arc segment in the normal working area satisfies 396mm≤R6≤404mm; the straight line segment in the normal working area is an inclined straight line, and the slope of the straight line is 1 / 50.

[0016] Furthermore, the low-taper region includes a straight line segment in the low-taper region, a starting end of the straight line segment in the low-taper region is smoothly connected to the normal working region, and a tail end is smoothly connected to the chamfer region;

[0017] The straight line segment in the low-taper area is an inclined straight line, and the slope of the straight line is 1 / 10.

[0018] Furthermore, the chamfered area includes a straight line segment of the chamfered area, the straight line segment of the chamfered area is located at the very end of the wheel tread profile, and the starting end of the straight line segment of the chamfered area is smoothly connected to the low taper area; the chamfered area is a 45° chamfer, and the length of the right-angle side of the chamfer is 6 mm.

[0019] The present invention also provides a wheel, comprising the wheel tread structure suitable for UIC60 rail as described above.

[0020] The present invention also provides a steering system, comprising a bogie and the wheel as described above, wherein the wheel is mounted on the bogie.

[0021] The present invention also provides a vehicle, comprising the steering system as described above.

[0022] Compared with the prior art, the present invention has the following advantages:

[0023] 1. The wheel tread structure of the present invention can meet the line conditions of 1353mm inner distance of vehicle wheelset and 1435mm track gauge, 1:20 rail bottom slope, and UIC60 rail. Based on the wheel tread structure, a good contact relationship can be achieved between the wheel and the rail, and the wheel-rail contact points are reasonably distributed to ensure uniform wear between the wheel and the rail, and the contact points are dispersed within the high contact stress area. The vehicle can run smoothly in the straight section of the line, and can achieve good curve passing ability under the line conditions of small curve radius, thereby improving the wheel turning and repair cycle, extending the service life of the track, and reducing maintenance and operating costs.

[0024] 2. The wheel tread structure of the present invention has low axle lateral force, high vehicle stability, small derailment coefficient and good passenger comfort within the vehicle speed range of 100 km / h and below.

[0025] Based on the above reasons, the present invention can be widely promoted in the fields of rail vehicles and the like. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0027] Figure 1 This is the cross-section diagram of UIC60 rail.

[0028] Figure 2It is the appearance diagram of the wheel tread structure of the present invention.

[0029] Figure 3 This is a comparison diagram of the wheel rim tread of the present invention and the tread profiles of S1002 and Tehran Metro.

[0030] Figure 4 It is a time history diagram of the derailment coefficient when passing through a curve under three types of wheel tread profiles of the present invention.

[0031] In the figure: 1. Rim area; 2. High taper area; 3. Normal working area; 4. Low taper area; 5. Chamfer area;

[0032] 1-1, the first straight line segment in the wheel rim area; 1-2, the first arc segment in the wheel rim area; 1-3, the second arc segment in the wheel rim area; 1-4, the second straight line segment in the wheel rim area;

[0033] 2-1, the first arc segment of the high taper area; 2-2, the second arc segment of the high taper area;

[0034] 3-1, the first arc segment in the normal working area; 3-2, the second arc segment in the normal working area; 3-3, the straight segment in the normal working area;

[0035] 4-1, Straight line segment in low taper area;

[0036] 5-1, straight line segment in chamfer area;

[0037] A. Rim thickness; B. Rim height; C. Distance between the rolling circle position and the starting point of the rim; D. Rim width;

[0038] R1, radius of the first arc segment in the rim area; R2, radius of the second arc segment in the rim area; R3, radius of the first arc segment in the high taper area; R4, radius of the second arc segment in the high taper area; R5, radius of the first arc segment in the normal working area; R6, radius of the second arc segment in the normal working area. DETAILED DESCRIPTION

[0039] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0040] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0041] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit exemplary embodiments according to the present invention. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprising" and / or "including" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0042] Unless otherwise specifically stated, the relative arrangement, numerical expressions and numerical values ​​of the parts and steps set forth in these embodiments do not limit the scope of the present invention. Meanwhile, it should be clear that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to the actual proportional relationship. The technology, method and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but in appropriate cases, the technology, method and equipment should be considered as a part of the specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, and therefore, once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0043] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention: the directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0044] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below their position devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0045] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the present invention.

[0046] The present invention provides a wheel tread structure suitable for UIC60 rails, that is, a new type of rail vehicle wheel tread suitable for UIC60 rails with a wheel set inner distance of 1353 mm, a track gauge of 1435 mm, a rail bottom slope of 1:20. The present invention is not limited to wheels, wheelsets, bogies and vehicles using the tread. The application of the wheel tread can not only reduce the wear between the wheel and the rail, and increase the service life of the wheel and the rail, but also ensure that the vehicle has high stability, safety and reliability at a speed level of 100 km / h and below, and meet the comfort of passengers.

[0047] A rail vehicle wheelset is made up of an axle and two identical wheels pressed together, with the wheel tread usually designed to be approximately conical in structure to facilitate vehicle guidance and smooth operation.

[0048] The invention is suitable for a vehicle with a wheel pair inner distance of 1353 mm, a track gauge of 1435 mm, a rail bottom slope of 1:20, and a UIC60 rail (see Figure 1 ) wheel tread structure is as follows Figure 2 shown.

[0049] The outer contour of the wheel tread structure of the present invention is composed of a plurality of straight line segments and circular arc segments, which are connected in sequence from point E1 to point E12, and point E3, point E4, point E5, point E6, point E7, point E8, point E9, point E10, and point E11 are included in sequence from point E1 to point E12. Point E1 is the starting end of the wheel tread, and E12 is the end of the wheel tread. The horizontal distance between the starting end E1 and the end E12 of the tread is the rim width D, and the rim width D satisfies 135mm≤D≤138mm. Draw a straight line horizontally through point E3, and then draw another straight line vertically through the starting point E1 of the tread, and the intersection of the two straight lines is the coordinate origin O. Take point O as the coordinate origin, the left side of the coordinate origin is the positive direction of the x-axis, the right side of the coordinate origin is the negative direction of the x-axis, the top of the coordinate origin is the positive direction of the y-axis, and the bottom of the coordinate origin is the negative direction of the y-axis. According to the above coordinate system positioning principle, the coordinate positions of the tread contour points E1 to E12 are shown in Table 1. C1 to C6 are the centers of each arc segment, and the coordinates of the centers of each arc segment are shown in Table 2.

[0050] Table 1 Coordinates of tread contour points

[0051] point X(mm) Y(mm) E1 0 16.5 E2 1.1110 8.5951 E3 10.5000 0 E4 26.2572 11.2330 E5 28.9466 17.8893 E6 35.3559 25.2614 E7 42.7159 28.0757 E8 55.4374 30.0417 E9 87.2405 31.9467 E10 102.2405 32.2467 E11 129.0000 34.9227 E12 135.0000 40.9227

[0052] Table 2 Coordinates of the center of the arc segment

[0053] Center X(mm) Y(mm) C1 11.0137 9.9868 C2 9.5679 17.9759 C3 42.8549 12.2702 C4 47.8536 3.6094 C5 67.3778 -89.3623 C6 95.2389 -367.9733

[0054] The present invention discloses a wheel tread structure suitable for UIC60 rails, the wheel tread structure is composed of a wheel flange area 1, a high taper area 2, a normal working area 3, a low taper area 4 and a chamfer area 5 connected in sequence, each area is smoothly connected in a tangential manner, and there are opposite arc surfaces between the wheel flange area 1 and the high taper area 2. There is a wheel rolling circle position in the normal working area 3, and the horizontal distance C between the rolling circle position and the tread starting point E1 is 70 mm. A straight line is drawn in the horizontal direction through the rolling circle position, and the straight line is the horizontal reference line of the tread.

[0055] The rim region 1 is composed of the first straight segment 1-1 (segment E1E2) of the rim region, the first arc segment 1-2 (segment E2E3) of the rim region, the second arc segment 1-3 (segment E3E4) of the rim region, and the second straight segment 1-4 (segment E4E5) of the rim region, and the tail end of the second straight segment 1-4 of the rim region is smoothly connected to the high taper region 2. The segments in the rim region 1 are connected end to end and smoothly connected in a tangential manner, and the arc segments are bent in the same direction. The first arc segment 1-2 of the rim region is an arc segment with C1 as the center and R1 as the radius. The radius R1 of the first arc segment of the rim region should satisfy 9mm≤R1≤11mm, preferably R1=10mm. The second arc segment 1-3 of the rim region is an arc segment with C2 as the center and R2 as the radius. The radius R2 of the second arc segment of the rim region should satisfy 17mm≤R2≤19mm, preferably R2=18mm. The distance between the highest point E3 of the wheel rim and the horizontal reference line of the tread is the wheel rim height B, which is 31.2 mm. The horizontal reference line of the tread is translated 10 mm to the outside of the wheel tread and intersects with the tread contour line at point K. The horizontal distance between point K and the starting point E1 of the wheel rim is the wheel rim thickness A, which is 30.8246 mm. The setting of various parameters in the wheel rim area can smoothly guide the wheels to run along the track, ensure that the vehicle can pass the curve smoothly, and avoid vehicle derailment.

[0056] The high-taper region 2 is composed of the first arc segment 2-1 (line segment E5E6) of the high-taper region and the second arc segment 2-2 (line segment E6E7) of the high-taper region. The starting end of the first arc segment 2-1 of the high-taper region is smoothly connected to the rim region 1, and the tail end of the second arc segment 2-2 of the high-taper region is smoothly connected to the normal working region 3. The regional segments in the high-taper region 2 are connected end to end and smoothly connected in a tangential manner, and each arc segment is bent in the same direction. The first arc segment 2-1 of the high-taper region is an arc segment with C3 as the center and R3 as the radius. The radius R3 of the first arc segment of the high-taper region should satisfy 14mm≤R3≤16mm, preferably R3=15mm. The second arc segment 2-2 of the high-taper region is an arc segment with C4 as the center and R4 as the radius. The radius R4 of the second arc segment of the high-taper region should satisfy 24mm≤R4≤26mm, preferably R4=25mm. The setting of various parameters in the high-taper area can satisfy the requirement that the vehicle better fits the curve of the curve when passing through the curve, reducing the wear and force between the vehicle and the UIC60 rail. Secondly, it can effectively suppress the snaking motion in the straight section, making the vehicle run more smoothly.

[0057] The normal working area 3 is composed of the first arc segment 3-1 of the normal working area (line segment E7E8), the second arc segment 3-2 of the normal working area (line segment E8E9), and the straight segment 3-3 of the normal working area (line segment E9E10). The starting end of the first arc segment 3-1 of the normal working area is smoothly connected to the high taper area 2, and the tail end of the straight segment 3-3 of the normal working area is smoothly connected to the low taper area 4. The regional segments in the normal working area 3 are connected end to end and smoothly connected in a tangential manner, and each arc segment is bent in the same direction. The first arc segment 3-1 of the normal working area is an arc segment with C5 as the center and R5 as the radius. The radius R5 of the first arc segment of the normal working area should satisfy 116mm≤R5≤124mm, preferably R5=120mm. The second arc segment 3-2 of the normal working area is an arc segment with C6 as the center and R6 as the radius. The radius R6 of the second arc segment in the normal working area should satisfy 396mm≤R6≤404mm, preferably R6=400mm. The straight line segment 3-3 in the normal working area is an inclined straight line with a slope of 1 / 50. The setting of the parameters in the normal working area through dynamic simulation calculation can make the contact stress distribution between the wheel and the UIC60 rail more reasonable, avoid excessive stress concentration, and the taper of 1 / 50 can better ensure the automatic centering of the vehicle during the operation of the straight section, thereby improving the stability of straight-line driving. It can also better adapt to the UIC60 rail when passing through a curved section, reducing the extrusion and friction between the wheel rim and the track.

[0058] The low-taper region 4 is composed of a low-taper region straight segment 4-1 (segments E10E11), the starting end of which is smoothly connected to the normal working region 3, and the tail end is smoothly connected to the chamfer region 5. The low-taper region straight segment 4-1 is an inclined straight line with a slope of 1 / 10. The slope of the straight segment of 1 / 10 can ensure that the vehicle can prevent sliding when passing through a small curve line section, and secondly, can pass through the turnout smoothly after a period of wear.

[0059] The chamfered area 5 is composed of a chamfered area straight line segment 5-1 (segments E11E12) and is located at the rear end of the wheel tread profile, and the starting end of the chamfered area straight line segment 5-1 is smoothly connected to the low taper area 4. The chamfered area 5 is a 45° chamfer, and the length of the right angle side of the chamfer is 6 mm to reduce the stress concentration of the wheel.

[0060] The points where the rolling circles of the wheel tread profile of the present embodiment and the two foreign wheel tread profiles are located are fixed at the same position, and the tread profiles are compared. Figure 3 The wheel tread height of the S1002 wheel is 28 mm and the wheel tread thickness is 32.5 mm, while the wheel tread height of the Tehran Metro is 24.58 mm and the wheel tread thickness is 32.69 mm. The derailment coefficient of the three wheel tread profiles when passing through the curve changes with time as shown in the figure below. Figure 4 shown.

[0061] Through dynamic simulation calculation and analysis, the S1002 tread of the comparative example is matched with the foreign UIC60 rail. When the track parameters of the inner distance of the wheelset is 1353mm, the track gauge is 1435mm and the rail bottom slope is 1:20, the equivalent taper of the wheel-rail contact is too small, the nonlinear critical speed of the vehicle is low, the serpentine vibration frequency is too low, and the bogie is prone to instability under the car body. Too low equivalent taper of wheel-rail contact leads to weakened wheel-rail guidance ability, untimely response of the vehicle to lateral unevenness of the line, and further excessive wheel-rail force. When the wheel tread of this embodiment is adopted, the derailment coefficient is lower than that of the S1002 wheel tread, and the vehicle safety is better. The equivalent taper between the wheel and the rail is large, and within the vehicle running speed range of 100km / h, the response to line unevenness is timely, and the lateral force of the axle is very small, which is conducive to the reliable operation of the bogie.

[0062] The comparative Tehran subway tread matches the foreign UIC60 rail. When the line conditions of the inner side distance of the wheel pair is 1353mm, the track gauge is 1435mm and the track bottom slope is 1:20, the vehicle using the comparative wheel tread has a large derailment coefficient of the guide wheel pair, while the vehicle using the present embodiment has a small derailment coefficient, which greatly reduces the risk of derailment and ensures the safety of vehicle operation. From the nonlinear critical speed analysis, the vehicle using the wheel tread of the present embodiment can have a higher critical speed than the vehicle using the Tehran subway tread.

[0063] The wheel-rail contact points of the wheel tread structure of this embodiment are reasonably distributed, and the wheel and the rail can maintain uniform wear. The contact points are dispersed within the high contact stress area, and the vehicle can run smoothly in the straight section of the line. Under the line conditions of small curve radius, it can achieve good curve passing ability, thereby improving the wheel turning and repair cycle, extending the service life of the track, and reducing maintenance and operating costs. In addition, in this embodiment, within the vehicle speed range of 100km / h and below, the axle lateral force is low, the vehicle stability is high, and it has good passenger comfort.

[0064] Based on the wheel tread structure of the UIC60 rail of the present invention, this embodiment also provides a wheel, which includes the wheel tread structure as described above. Further, this embodiment also provides a steering system, which includes a bogie and the wheel as described above, and the wheel is mounted on the bogie. Further, this embodiment also provides a vehicle, which includes the steering system as described above.

[0065] Key technical points of the present invention: (1) A wheel tread structure is provided that meets the requirements of a rim thickness of 30.8246 mm, a rim height of 31.2 mm, and a rim width of 135 to 138 mm. (2) In the wheel tread of this embodiment, the radius R1 of the first arc segment in the rim area satisfies 9 mm ≤ R1 ≤ 11 mm. The radius R2 of the second arc segment in the rim area satisfies 17 mm ≤ R2 ≤ 19 mm. The radius R3 of the first arc segment in the high-taper area satisfies 14 mm ≤ R3 ≤ 16 mm. The radius R4 of the second arc segment in the high-taper area satisfies 24 mm ≤ R4 ≤ 26 mm. The radius R5 of the first arc segment in the normal working area satisfies 116 mm ≤ R5 ≤ 124 mm. The radius R6 of the second arc segment in the normal working area satisfies 396 mm ≤ R6 ≤ 404 mm. The straight line segment in the normal working area is an inclined straight line with a slope of 1 / 50. The straight line section in the low-taper area is an inclined straight line, and the slope of the straight line is 1 / 10. (3) A wheel tread, a wheel, a bogie and a vehicle suitable for a track gauge of 1435 mm, an inner distance of a wheelset of 1353 mm, a rail bottom slope of 1:20 and a UIC60 rail are provided.

[0066] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A wheel tread structure suitable for UIC60 rail, characterized in that: include: The wheel rim area (1), the high taper area (2), the normal working area (3), the low taper area (4) and the chamfer area (5) are connected in sequence, and the areas are continuously and smoothly connected in a tangential manner. There are opposite arc surfaces between the wheel rim area (1) and the high taper area (2). There is a wheel rolling circle position in the normal working area (3), and a horizontal straight line passing through the rolling circle position is a tread horizontal reference line; The wheel rim area (1) comprises at least two arc segments and two straight segments, each segment is connected end to end and is continuously and smoothly connected in a tangential manner, and each arc segment is bent in the same direction.

2. The wheel tread structure suitable for UIC60 rail according to claim 1, characterized in that: The rim region (1) comprises a first straight segment (1-1) in the rim region, a first arc segment (1-2) in the rim region, a second arc segment (1-3) in the rim region and a second straight segment (1-4) in the rim region, which are smoothly connected in sequence from beginning to end, and the tail end of the second straight segment (1-4) in the rim region is smoothly connected to the high-taper region (2).

3. The wheel tread structure suitable for UIC60 rail according to claim 2, characterized in that: The radius R1 of the first arc segment (1-2) of the wheel rim region satisfies 9mm≤R1≤11mm; the radius R2 of the second arc segment (1-3) of the wheel rim region satisfies 17mm≤R2≤19mm; The distance between the highest point E3 of the wheel rim area (1) and the horizontal reference line of the tread is 31.2 mm; The tread horizontal reference line is translated 10 mm to the outside of the wheel tread and intersects the tread contour line at point K. The horizontal distance between point K and the starting point E1 of the rim area (1) is the rim thickness, which is 30.8246 mm.

4. The wheel tread structure suitable for UIC60 rail according to claim 1, characterized in that: The high-taper region (2) comprises a first arc segment (2-1) of the high-taper region and a second arc segment (2-2) of the high-taper region which are connected end to end and smoothly connected in a tangential manner, the starting end of the first arc segment (2-1) of the high-taper region is smoothly connected to the rim region (1), the tail end of the second arc segment (2-2) of the high-taper region is smoothly connected to the normal working region (3), and the first arc segment (2-1) of the high-taper region and the second arc segment (2-2) of the high-taper region are bent in the same direction; The radius R3 of the first arc segment (2-1) of the high-taper area satisfies 14mm≤R3≤16mm; and the radius R4 of the second arc segment (2-2) of the high-taper area satisfies 24mm≤R4≤26mm.

5. The wheel tread structure applicable to UIC60 rail according to claim 1, characterized in that: The normal working area (3) comprises a first arc segment (3-1) of the normal working area, a second arc segment (3-2) of the normal working area and a straight line segment (3-3) of the normal working area which are connected end to end and smoothly connected in a tangential manner, the starting end of the first arc segment (3-1) of the normal working area is smoothly connected to the high taper area (2), the tail end of the straight line segment (3-3) of the normal working area is smoothly connected to the low taper area (4), and the first arc segment (3-1) of the normal working area and the second arc segment (3-2) of the normal working area are bent in the same direction; The radius R5 of the first arc segment (3-1) of the normal working area satisfies 116mm≤R5≤124mm; the radius R6 of the second arc segment (3-2) of the normal working area satisfies 396mm≤R6≤404mm; the straight line segment (3-3) of the normal working area is an inclined straight line, and the slope of the straight line is 1 / 50.

6. The wheel tread structure applicable to UIC60 rail according to claim 1, characterized in that: The low-taper region (4) comprises a low-taper region straight line segment (4-1), the starting end of the low-taper region straight line segment (4-1) is smoothly connected to the normal working region (3), and the tail end is smoothly connected to the chamfer region (5); The straight line segment (4-1) in the low-taper region is an inclined straight line, and the slope of the straight line is 1 / 10.

7. The wheel tread structure suitable for UIC60 rail according to claim 1, characterized in that: The chamfered area (5) comprises a chamfered area straight segment (5-1), the chamfered area straight segment (5-1) is located at the rearmost end of the wheel tread profile, and the starting end of the chamfered area straight segment (5-1) is smoothly connected to the low taper area (4); the chamfered area (5) is chamfered at 45°, and the length of the right angle side of the chamfer is 6 mm.

8. A wheel, characterized in that: The invention comprises a wheel tread structure suitable for UIC60 rail as claimed in any one of claims 1 to 7.

9. A steering system, characterized in that: The invention comprises a bogie and the wheel as claimed in claim 8, wherein the wheel is mounted on the bogie.

10. A vehicle, characterized in that: Comprising a steering system as claimed in claim 9.

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