CN113263865A

CN113263865A - Wheel structure and rail grinding wagon

Info

Publication number: CN113263865A
Application number: CN202110815945.9A
Authority: CN
Inventors: 刘伟文; 梁德敏; 陈其林; 肖朝华; 朱伟; 周裕仁
Original assignee: Yiluxing Beijing Technology Co ltd
Current assignee: Yiluxing Beijing Technology Co ltd
Priority date: 2021-07-20
Filing date: 2021-07-20
Publication date: 2021-08-17
Anticipated expiration: 2041-07-20
Also published as: CN113263865B

Abstract

The invention provides a wheel structure and a steel rail grinding wagon, relates to the field of railway tracks, and solves the problem that when the steel rail grinding wagon grinds turnout bent strands, the rims of guide wheels can damage or even damage the actual tips of frog point rails (hereinafter referred to as fork tips). The wheel structure comprises a wheel body, wherein the wheel body is provided with a tread and a rim which are connected, an inclined part is arranged at the top of the rim and is positioned at the outer side of the rim, and the part of the inclined part connected with the root part of the rim is gradually inclined along the radial direction of the wheel body to the direction away from the tread so as to provide guiding force for the wheel body to turn by being mutually extruded with the middle lower part of the fork point when passing through the fork point. The inclined part is arranged on the top of the wheel rim and arranged outside the wheel rim, a larger gap is formed between the wheel and the fork center before the wheel and the fork center are initially contacted, the collision hidden danger when the wheel initially contacts the fork center is eliminated, the inclined part of the wheel rim and the middle lower part of the fork point are mutually extruded to provide a moderate guiding force for the steering of the small wheel, and the wheel rim of the steel rail grinding vehicle is prevented from colliding with the fork point.

Description

Wheel structure and rail grinding wagon

Technical Field

The invention relates to the technical field of railway tracks, in particular to a wheel structure and a steel rail grinding wagon.

Background

The rail grinding wagon for domestic railway/subway consists of RGH-10 series GMC-20 type steel rail grinding wagon, and the operation running guide mechanism consists of eight guide wheels, four guide wheel support mechanisms, two side pressing mechanisms, etc. The width of the operation running mechanism of the grinding wagon can be manually adjusted by adjusting nuts so as to adapt to the rail gauge of the steel rail, and the proper lateral pressure is applied by matching with a lateral pressure mechanism so as to prevent the grinding wagon from derailing. Two guide wheels of the grinding wagon are in a group, bear all static and dynamic loads from the grinding wagon during operation and transmit the static and dynamic loads to the steel rail; the running and the steering of the polishing trolley on the steel rail can be simultaneously ensured by the guide wheels, and the load generated by the irregularity of the line is transferred to the polishing trolley, so that a reference is provided for the operation, and the polishing precision of the steel rail is ensured.

The prior art at least has the following technical problems: referring to fig. 1-3, fig. 1 is a side view of a prior art wheel rim; FIG. 2 is a schematic view of a prior art grinding wagon guide wheel rim impacting the actual tip of the frog point rail; fig. 3 is a partially enlarged view of a portion a in fig. 2.

The existing grinding vehicle guide wheel has better wear resistance. When the steel rail grinding wagon grinds the turnout bent strand, the flange of the guide wheel can crush or even damage the actual tip (for short, a fork tip) of the frog point rail, so that the turnout bent strand cannot be ground, and the operation range and the operation area of the steel rail grinding wagon are limited.

Disclosure of Invention

The invention aims to provide a wheel structure and a steel rail grinding wagon, and aims to solve the technical problem that the flange of a guide wheel can damage or even break a fork tip when the steel rail grinding wagon in the prior art grinds a curved strand of a turnout; the technical effects that can be produced by the preferred technical scheme in the technical schemes provided by the invention are described in detail in the following.

In order to achieve the purpose, the invention provides the following technical scheme:

the invention provides a wheel structure, which comprises a wheel body, wherein the wheel body is provided with a tread and a rim which are connected, and the wheel structure comprises:

the wheel comprises a wheel body, a wheel rim and a wheel body, wherein the wheel body is provided with a tread, the top of the wheel rim is provided with an inclined part, the inclined part is positioned on the outer side of the wheel rim, and the part of the inclined part connected with the root part of the wheel rim is gradually inclined along the radial direction of the wheel body in the direction away from the tread so as to be mutually extruded with the fork point when passing through the fork point and assist the steering of the wheel body.

Preferably, the molded line connecting the root of the rim and the top of the rim in the inclined part is a straight line segment or a circular arc segment.

Preferably, the inclined part thickness D1 ranges from 1/3D to 1/2D, where D is the thickness of the rim.

Preferably, the inclined portion thickness D1 is 1/2D, where D is the thickness of the rim.

Preferably, the thickness D1 of the inclined part ranges from 7.4mm to 12.7 mm.

Preferably, the root of the wheel rim is positioned between the inclined part and the tread, the root of the wheel rim comprises a vertical plane h, and the value range of the vertical plane h is 10-15 mm.

Preferably, the rim angle between the outer side of the rim and the horizontal plane ranges from 60 ° to 70 °.

Preferably, the wheel roller with the tread and the wheel rim are detachably connected or integrally formed.

The invention also provides a rail grinding wagon, which comprises a guide wheel set, wherein the guide wheel set is provided with the wheel structure.

Preferably, the guide wheel group includes a front guide wheel and a rear guide wheel, wherein only the front guide wheel has the wheel structure.

Compared with the prior art, the wheel structure and the steel rail grinding wagon provided by the invention have the following beneficial effects: the wheel structure keeps the original thickness of the root part of the wheel rim, and ensures that the contact point of the wheel is consistent with the contact point of the original wheel when the wheel passes through the fork center; set up the rake on the rim top, and the rake sets up in the rim outside, like this, there is great clearance wheel and fork heart before initial contact (when wheel and fork contact promptly), the striking hidden danger when eliminating wheel initial contact fork heart, the rake of rim and fork point in the lower part extrude each other for the turning to of little wheel provide comparatively mild guiding force, guarantee that the wheel can turn to smoothly, prevent rail grinding vehicle rim collision fork point.

Drawings

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

FIG. 1 is a side view of a prior art wheel rim;

FIG. 2 is a schematic view of a prior art grinding wagon guide wheel rim impacting the actual tip of the frog point rail;

FIG. 3 is an enlarged view of a portion of FIG. 2 at A;

FIG. 4 is a schematic view of a wheel as it passes through a fixed frog;

FIG. 5 is a schematic view of the wheel construction of the present invention;

FIG. 6 is an axial cross-sectional structural view of a first embodiment of the wheel structure of the present invention;

FIG. 7 is an axial cross-sectional structural view of a second embodiment of the wheel structure of the present invention;

FIG. 8 is a schematic view of the grinding machine of the present invention showing the condition where the leading wheel rim hits the actual tip of the frog point rail;

fig. 9 is a partial enlarged view at B in fig. 8.

100, center rail; 101. a fork point; 200. protecting the rail; 1. a rim; 11. an inclined portion; 12. a rim root; 2. a roller; 21. the tread is provided.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be described in detail below. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the examples given herein without any inventive step, are within the scope of the present invention.

In the description of the present invention, it is to be understood that the terms "center", "length", "width", "height", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "side", and the like, indicate orientations and positional relationships based on the orientations and positional relationships shown in the drawings, and are used merely for convenience of description and for simplicity of description, and do not indicate or imply that the equipment or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

The embodiment of the invention provides a wheel structure and a steel rail grinding wagon, wherein the inclined part of a wheel rim and a fork point are mutually extruded to provide a relatively mild guiding force for the steering of a small wheel, so that the wheel rim of the steel rail grinding wagon is prevented from colliding with the fork point.

The technical solution provided by the present invention is explained in more detail below with reference to fig. 1 to 8.

Referring to fig. 1, fig. 1 is a side view of a wheel rim in the prior art, and a grinding trolley guide wheel rim 1 is small in profile arc, thin in thickness, incapable of being guided by a guard rail and even not beneficial to avoiding obstacles after serious abrasion.

The above-described prior art wheel structure has the following problems in practical use: referring to fig. 2 and 3, when the grinding trolley passes through a fixed frog of a single turnout, the periphery of the rim 1 of the guide wheel collides with the actual tip (hereinafter referred to as a frog tip 101) of a frog point rail 100 (as shown in fig. 3), and the guide wheel can bounce for a certain height instantly and then fall back to the steel rail during collision, so that equipment and the steel rail are damaged, and the risk that the guide wheel of the grinding trolley falls off the steel rail exists.

During analysis, the problem that the guide wheel of the grinding wagon collides with the prong 101 is found to occur when the grinding wagon passes through the fixed frog of the single turnout and runs in the direction facing the prong 101; the colliding guide wheel is located at the front end of the forward direction of the sanding trolley, as shown in fig. 3.

Since the collision occurs in the fixed frog area of the single switch, the gap from the frog throat to the fork point 101 is the interrupted area of the rail, which is a harmful space that the wheel can not pass through smoothly. Therefore, in the prior art, the guard rail 200 is arranged on the inner side of the stock rail 300 in the area to ensure that the wheel is restrained by the guard rail 200 so that the wheel on the other side does not collide with the fork point 101, as shown in fig. 2 and 4.

However, even with the constraint of the guard rail 200, there is still a problem that the rim 1 collides with the fork 101. The main reason is that the distance from the working edge of the frog point rail 100 to the working edge of the guard rail (hereinafter referred to as the inspection interval d) is standard, see fig. 4. Since the clearance D is fixed, the guard rail 200 can only play a role in restriction if the sum of the wheel back distance D3 of the wheel and the thickness D of the wheel rim 1 is smaller than the clearance D to ensure that the wheel does not collide with the fork point 101 when passing through, as shown in the figure. Since the minimum value of the inspection interval D of the standard fixed frog is 1391 mm, and the adjustment value of the sum of the wheel back distance D3 of the grinding trolley guide wheel of the CMC-20 turnout grinding vehicle and the thickness D of the wheel rim 1 is usually 1405-1410 mm, which is obviously larger than the inspection interval D, the guard rail 200 cannot play a role of restricting the guide wheel when the grinding trolley passes through, and the guide wheel can collide with the fork point 101. Therefore, in the prior art, even if the guard rail is arranged, the problem that the wheel rim collides with the fork point still exists.

Based on the above analysis, some researchers have thinned the rim 1 thickness in order to make the adjustment value of the sum of the wheel back distance and the rim 1 thickness smaller than the check interval, but the above modification will cause the following problems to occur: on one hand, the contact area between the wheel rim 1 and the steel rail is insufficient due to the fact that the thickness of the wheel rim 1 is reduced, and the risk of derailment exists; on the other hand, after the wheel rim 1 is used for a period of time, the abrasion is more serious, the wheel back distance can only be adjusted to adapt to the distance between the steel rails, the wheel back distance is increased, namely, the wheel back distance returns to the initial value of the sum of the wheel back distance and the thickness of the wheel rim 1, and the avoidance of obstacles is also not facilitated.

In summary, in the prior art, the problem that the wheel rim collides with the fork tip cannot be effectively prevented by arranging the guard rail on the rail and reducing the thickness of the whole wheel rim; and this problem has been troubling researchers.

Example one

By analysing the cause of the prior art rim hitting the prongs, and in view of the above analysis, as shown in figures 5 to 9, the present embodiment provides a wheel structure comprising a wheel body having a tread 21 and a rim 1 connected thereto, wherein: the top of the wheel rim is provided with an inclined part 11, the inclined part 11 is positioned at the outer side of the wheel rim 1, and the part of the inclined part 11 connected with the root part 12 of the wheel rim is gradually inclined along the radial direction of the wheel body to the direction away from the tread 21 so as to provide a guiding force for the turning of the wheel body by being mutually pressed with the fork points 101 when passing through the fork points 101.

Wherein, as is well known to those skilled in the art, the outer side of the rim 1 refers to the side facing the inner side of the rail, i.e. the side of the rim 1 facing the tread 21; the root and the top of the rim 1 are respectively that along the radial direction of the rim 1, the part connected with the tread 21 is the root of the rim 1, and the part far away from the tread 21 is the top of the rim 1.

The wheel structure of the embodiment keeps the original thickness of the root part 12 of the wheel rim, namely the whole thickness part of the wheel rim is not reduced, and ensures that the contact point of the wheel is consistent with the contact point of the original wheel when the wheel passes through the fork center; an inclined portion 11 is provided on the top of the rim, and the inclined portion 11 is provided outside the rim 1. Comparing fig. 3 and fig. 9, it is easy to find that the periphery of the wheel rim can collide with the fork point when shipping in the prior art, in this embodiment, only the inclined part 11 is arranged on the top of the wheel rim, the inclined part 11 gradually inclines to the direction away from the tread 21, so that the wheel and the fork center have a larger gap before initially contacting (i.e. when the wheel contacts with the fork point 101), the impact hazard when the wheel initially contacts with the fork center is eliminated by using the inclined part 11, referring to fig. 9, the inclined surface on the inclined part 11 and the fork point 101 are pressed against each other, and since the inclined part provides a more moderate guiding force for the turning of the small wheel, the wheel can be smoothly turned, and the rail grinding wheel rim 1 is prevented from colliding with the fork point 101.

After the wheel rim 1 is provided with the inclined portion 11 as shown in fig. 8 and 9, a large gap is formed between the outside of the wheel rim 1 and the prongs 101 when the wheel is initially in contact with the prongs 101. referring to fig. 9, the inclined portion 11 is brought into contact with the prongs 101 instead of the top of the wheel rim 1 directly colliding with the prongs 101, as shown in fig. 3. The inclined part 11 provides good guiding force and buffering for the operation of the grinding wagon in operation, particularly when the grinding wagon passes through a fork center, eliminates contact impact of a wheel rail and prevents a wheel body from crashing the fork center.

And as shown in fig. 6, the inclined part 11 is only arranged at the top of the wheel rim in the embodiment, the thickness of the root part 12 of the wheel rim is not changed, the thickness of the wheel rim 1 of the wheel is not influenced, and the sufficient contact area between the wheel rim 1 and the steel rail is ensured. Therefore, compared with the method of reducing the wheel rim 1 in the prior art, the problem that insufficient contact between the wheel rim 1 and the steel rail is needed to adjust the wheel back distance D3 can be prevented.

As an alternative embodiment, referring to fig. 6 and 7, the profile of the inclined portion 11 connecting the rim root 12 and the rim top is a straight line segment (as shown in fig. 6) or a circular arc segment (as shown in fig. 7). An arc section or a straight section is formed among the top of the wheel rim, the outer side of the wheel rim 1 and the wheel rim angle, and the wheels of the grinding wagon are guided to smoothly pass through the fork center without violent collision.

As shown in fig. 3, it has been found that the collision of the rim 1 with the fork 101 in the prior art occurs generally at the position 1/3 from the outside of the rim 1 (the side of the rim 1 facing the tread 21). Therefore, in the present embodiment, the thickness D1 of the inclined portion 11 ranges from 1/3D to 1/2D, where D is the thickness of the rim 1. In other words, the thickness D1 of the inclined portion 11 is at least 1/3 of the thickness of the rim 1, and since the inclined portion 11 is provided outside the rim 1, the rim 1 can be effectively prevented from colliding with the fork center. But the thickness of the inclined portion 11 must not be too great, otherwise too small a rim top thickness will affect the strength and service life of the rim 1. Preferably, the thickness D1 of the inclined portion 11 is 1/2D, where D is the thickness of the rim 1.

The top of the wheel rim is provided with the inclined part 11, and when the thickness D1 of the inclined part 11 is 1/2D, D is the thickness of the wheel rim 1; the thickness of the top of the wheel rim is reduced by about 1/2, so that a larger gap exists between the wheel body and the fork 101 before the wheel body and the fork 101 are initially contacted, and the collision hidden danger of the wheel during initial contact is eliminated; and a proper circular arc section or straight line section is adopted for transition between the top of the wheel rim and the root 12 of the wheel rim, so that a relatively moderate transition and guiding force is provided for steering of the small wheel.

As an alternative embodiment, the wheel rim 1 has a standard dimension of 25.4mm, in which case the thickness D1 of the inclined portion 11, as shown in figures 6 and 7, ranges from 7.4mm to 12.7 mm. The thickness of the inclined portion 11 ensures that the wheel of the grinding wagon can smoothly pass through the fork 101 under most conditions, and the service life of the wheel body is prolonged.

As an alternative embodiment, see fig. 6, the rim base 12 is located between the incline 11 and the tread 21, the rim base 12 comprising a vertical plane h, the vertical plane h having a value in the range of 8-15 mm. In the above range, the rim 1 can increase the contact area between the rim 1 and the rail, and reduce the wear of the rim 1.

As an alternative embodiment, see fig. 6, the rim angle α between the outside of the rim 1 and the horizontal plane ranges from 60 ° to 70 °. The rim angle alpha between the outer side of the rim 1 and the horizontal plane is controlled to be 60-70 degrees, the safety of the curve passing of the wheel body can be ensured, and the wheels of the grinding vehicle are guided to smoothly pass through the fork point 101 without severe collision.

As an alternative embodiment, as shown in fig. 6 and 7, the wheel roller 2 with the tread 21 and the rim 1 in this embodiment can be detachably connected or integrally formed.

Wherein, accessible screw or bolt etc. can dismantle the connection between rim 1 and the round roller 2, and the structure of dismantling the connection between rim 1 and the round roller 2 can change tread 21 or rim 1 alone, reduces equipment use cost, has better economic nature.

Example two

The embodiment provides a rail grinding wagon, including the direction wheelset, the direction wheelset has above-mentioned wheel structure.

Because this rail sanding vehicle has above-mentioned wheel structure, the top of wheel body sets up slope 11, does not influence rim 1 thickness. And can make wheel and fork center have great clearance before the initial contact (when wheel and fork point 101 contact promptly), eliminate the striking hidden danger when wheel initial contact fork center, the slope 11 of rim 1 and fork point 101 mutual extrusion provide comparatively mild guiding force for turning to of little wheel, guarantee that the wheel can turn to smoothly, have eliminated rim 1 collision fork point 101 hidden danger.

The guide wheel set of this embodiment includes preceding leading directive wheel and back directive wheel, and wherein, preceding directive wheel and back directive wheel can all set up above-mentioned wheel structure. Because in the advancing process of the steel rail grinding wagon, the front guide wheel plays a role in steering, the preferred embodiment is that only the front guide wheel is provided with a wheel structure, and the rear guide wheel is not provided with the wheel structure, so that the grinding wagon is ensured to smoothly pass through the fork point 101, the collision between the wheel rim 1 and the fork point 101 is prevented, and the service life of the guide wheel is prolonged.

The particular features, structures, or characteristics may be combined in any suitable manner in any one or more embodiments or examples.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.

Claims

1. A wheel structure comprising a wheel body, wherein the wheel body has a tread and a rim connected, wherein:

the wheel comprises a wheel body, a wheel rim and a wheel body, wherein the wheel body is provided with a tread, the wheel rim is provided with a fork point, the top of the wheel rim is provided with an inclined part, the inclined part is positioned on the outer side of the wheel rim, and the part of the inclined part connected with the root part of the wheel rim is gradually inclined along the radial direction of the wheel body to the direction away from the tread so as to provide guiding force for the wheel body to rotate by mutual extrusion with the fork point when passing through the fork point.

2. The wheel structure according to claim 1, wherein a molded line in the inclined portion that connects the rim root portion and the rim top portion is a straight line segment or a circular arc segment.

3. The wheel structure of claim 1, wherein the beveled portion thickness D1 has a value in the range of 1/3D-1/2D, where D is the thickness of the rim.

4. The wheel structure according to claim 1 or 3, wherein the inclined portion thickness D1 is 1/2D, where D is the thickness of the rim.

5. The wheel structure of claim 1, wherein the beveled portion thickness D1 is in a range of 7.4mm to 12.7 mm.

6. The wheel structure of claim 1, wherein the rim root is located between the incline and the tread, the rim root including a vertical plane h, the vertical plane h having a value in the range of 10mm to 15 mm.

7. A wheel construction according to claim 1 wherein the rim angle between the outer side of the rim and the horizontal is in the range 60 ° to 70 °.

8. The wheel structure according to claim 1, wherein the wheel roller having the tread and the rim are detachably connected or integrally formed.

9. A rail grinding wagon comprising a guide wheel assembly having a wheel structure according to any one of claims 1 to 8.

10. A rail grinding wagon according to claim 9 wherein the steerable wheel set includes a front steerable wheel and a rear steerable wheel, wherein only the front steerable wheel has the wheel configuration.