Straddle-type monorail vehicle running wheel mechanism

Abstract

The straddle-type monorail vehicle running wheel mechanism provided by the application is characterized in that the first brake shaft and the second brake shaft are coaxial and rotationally connected, so that the first running wheel and the second running wheel can rotate independently, when the rail vehicle runs on a curve section, the first running wheel or the second running wheel on the outside only rotates and does not slide, effectively reducing the wear of the first running wheel and the second running wheel on the outside, improving the braking efficiency, and when braking is required, the braking assembly simultaneously applies braking force to the first brake shaft and the second brake shaft to brake the first running wheel and the second running wheel synchronously.

Description

Technical Field

[0001] This invention relates to the field of straddle-type monorail vehicle technology, and more particularly to a running wheel mechanism for straddle-type monorail vehicles. Background Technology

[0002] Straddle-type monorail vehicle bogies are known in this technical field. A monorail vehicle has one bogie at the front and one at the rear to support the car body. The monorail bogie is used to support the car body and move along the direction of the track beam. The monorail bogie has running wheels (two as a group) that travel along the upper surface of the track and guide wheels that travel along the side of the track and provide lateral support for the monorail vehicle.

[0003] Currently, the running wheels in existing monorail non-powered bogies are designed to be coaxial, with both running wheels rotating at the same speed.

[0004] However, the inventors discovered that when a rail vehicle travels on a curved section, the displacement of the outer running wheel is relatively larger than that of the inner running wheel, causing the outer running wheel to slide while rotating, resulting in severe wear and reduced lifespan of the outer running wheel. Summary of the Invention

[0005] In view of this, the purpose of this invention is to provide a straddle-type monorail vehicle running wheel mechanism that enables the two running wheels to rotate independently when turning and to brake synchronously, effectively solving the technical problems in the background art.

[0006] To achieve the above objectives, the present invention provides a straddle-type monorail vehicle running wheel mechanism, comprising:

[0007] The hollow first brake shaft is rotatably connected to the frame mounting base;

[0008] The first traveling wheel is fixedly mounted on the first brake shaft;

[0009] The second brake shaft is concentrically disposed within the first brake shaft and is rotatably connected to the first brake shaft;

[0010] The second traveling wheel is fixedly mounted on the second brake shaft, and the second traveling wheel is arranged parallel to the first traveling wheel;

[0011] Braking components are respectively connected to the first brake shaft and the second brake shaft;

[0012] During driving, the first and second running wheels rotate independently. During braking, the braking assembly applies braking force to the first and second brake shafts simultaneously to make the first and second running wheels brake synchronously.

[0013] In this embodiment of the invention, the first and second brake shafts are coaxially and rotatably connected, enabling the first and second running wheels to rotate independently. Thus, when the rail vehicle travels on a curved section, the first or second running wheel on the outer side only rotates and does not slip, effectively reducing the wear of the first and second running wheels on the outer side and improving braking efficiency. In addition, when braking is required, the braking assembly simultaneously applies braking force to the first and second brake shafts to make the first and second running wheels brake synchronously.

[0014] As an optional implementation, the braking assembly includes:

[0015] The annular brake disc has multiple support columns on its inner wall;

[0016] Multiple bevel gears are rotatably mounted on the multiple support columns, each corresponding to one of the support columns.

[0017] The first turntable is fixedly installed on the first brake shaft, and a first gear ring adapted to the bevel gear is provided on the side of the first turntable facing the support column.

[0018] The second turntable is fixedly installed on the second brake shaft, and a second gear ring adapted to the bevel gear is provided on the side of the second turntable facing the support column.

[0019] In this embodiment, when the rail vehicle travels on a curved section, the difference in distance between the inner and outer sides of the curve causes a certain difference in the rotational speed of the first and second running wheels. Through the transmission between the first and second brake shafts, the first and second gear rings rotate relative to each other. At this time, the bevel gear located between the first and second gear rings rotates accordingly without interfering with the rotation of the first and second running wheels. When the rail vehicle needs to brake, the clamps installed on the rail vehicle body clamp the annular brake disc. The braking force generated is transmitted through the bevel gears to the first gear ring and the first brake shaft, as well as through the bevel gears to the second gear ring and the second brake shaft, thus simultaneously braking the first and second running wheels.

[0020] As an optional implementation, the number of bevel gears is 4-12, and they are evenly distributed along the annular brake disc.

[0021] As an optional implementation, a special-shaped bearing is also included, which is disposed between the first brake shaft and the second brake shaft.

[0022] As an optional implementation, the irregular bearing includes an inner ring and an outer ring coaxially arranged, a roller disposed between the inner ring and the outer ring, and a sealing ring, wherein:

[0023] The inner ring includes an inner ring body and an inner ring connecting portion protruding inward from the inner ring body. The inner ring connecting portion is fixedly connected to the second brake shaft and / or the second running wheel.

[0024] The outer ring includes an inner ring body and an outer ring connecting portion protruding outward from the outer ring body. The outer ring connecting portion is fixedly connected to the first brake shaft and / or the first running wheel.

[0025] As an optional implementation, a connecting bearing is also included, which is disposed between the first brake shaft and the frame mounting base.

[0026] As an optional implementation, the first traveling wheel includes:

[0027] The first wheel hub is fixedly connected to the first brake shaft;

[0028] The first tire is positioned on the outside of the first wheel hub;

[0029] The first safety wheel is fixedly mounted on the outside of the first wheel hub and located inside the first tire.

[0030] As an optional implementation, the second traveling wheel includes:

[0031] The second wheel hub is fixedly connected to the second brake shaft;

[0032] The second tire is positioned on the outside of the second wheel hub;

[0033] The second safety wheel is fixedly mounted on the outside of the second wheel hub and located inside the second tire.

[0034] As can be seen from the above, the straddle-type monorail vehicle running wheel mechanism provided by the present invention enables the first running wheel and the second running wheel to rotate independently through a first brake shaft and a second brake shaft that are coaxially and rotatably connected. Thus, when the rail vehicle is traveling on a curve, the first or second running wheel on the outside only rotates and does not slip, effectively reducing the wear of the first and second running wheels on the outside and improving braking efficiency. In addition, when braking is required, the braking assembly simultaneously applies braking force to the first brake shaft and the second brake shaft to make the first and second running wheels brake synchronously. Attached Figure Description

[0035] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0036] Figure 1 This is a front view (sectional view) of an embodiment of the present invention;

[0037] Figure 2 This is a three-dimensional structural schematic diagram of the braking assembly according to an embodiment of the present invention;

[0038] Figure 3 This is an exploded axial view of the braking assembly according to an embodiment of the present invention;

[0039] Figure 4 This is a schematic diagram of the annular brake disc and bevel gear according to an embodiment of the present invention.

[0040] In the diagram, 1. Second running wheel; 11. Second tire; 12. Second safety wheel; 13. Second hub; 2. First running wheel; 21. First tire; 22. First safety wheel; 23. First hub; 3. Special-shaped bearing; 31. Inner ring; 32. Outer ring; 33. Sealing ring; 4. First brake shaft; 5. Frame mounting base; 6. Connecting bearing; 7. Brake assembly; 71. First turntable; 72. Second turntable; 73. Bevel gear; 74. Ring brake disc; 8. Second brake shaft. Detailed Implementation

[0041] To make the objectives, technical solutions, and advantages of the present invention clearer, the present invention will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0042] It should be noted that, unless otherwise defined, the technical or scientific terms used in the embodiments of this invention should have the ordinary meaning understood by one of ordinary skill in the art to which this disclosure pertains. The terms "first," "second," and similar terms used in this disclosure do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0043] To solve the aforementioned technical problems, such as Figure 1-4 As shown, an embodiment of the present invention provides a straddle-type monorail vehicle running wheel mechanism, comprising:

[0044] The hollow first brake shaft 4 is rotatably connected to the frame mounting base 5;

[0045] The first traveling wheel 2 is fixedly mounted on the first brake shaft 4;

[0046] The second brake shaft 8 is concentrically disposed within the first brake shaft 4 and is rotatably connected to the first brake shaft 4;

[0047] The second traveling wheel 1 is fixedly installed on the second brake shaft 8, and the second traveling wheel 1 is arranged parallel to the first traveling wheel 2;

[0048] Braking assembly 7 is connected to the first brake shaft 4 and the second brake shaft 8 respectively;

[0049] During driving, the first running wheel 2 and the second running wheel 1 rotate independently. During braking, the braking assembly 7 applies braking force to the first brake shaft 4 and the second brake shaft 8 simultaneously, so that the first running wheel 2 and the second running wheel 1 brake synchronously.

[0050] In this embodiment of the invention, the first brake shaft 4 and the second brake shaft 8 are coaxially and rotatably connected, enabling the first running wheel 2 and the second running wheel 1 to rotate independently. Thus, when the rail vehicle travels on a curved section, the first running wheel 2 or the second running wheel 1 on the outer side only rotates and does not slip, effectively reducing the wear of the first running wheel 2 and the second running wheel 1 on the outer side and improving braking efficiency. In addition, when braking is required, the braking assembly 7 simultaneously applies braking force to the first brake shaft 4 and the second brake shaft 8 to make the first running wheel 2 and the second running wheel 1 brake synchronously.

[0051] As an optional implementation method, such as Figure 2-4 As shown, the braking assembly 7 includes:

[0052] The annular brake disc 74 has multiple support columns on its inner wall;

[0053] Multiple bevel gears 73 correspond one-to-one with multiple support columns and are rotatably mounted on the support columns;

[0054] The first turntable 71 is fixedly installed on the first brake shaft 4, and the first turntable 71 is provided with a first gear ring adapted to the bevel gear 73 on the side facing the support column.

[0055] The second turntable 72 is fixedly installed on the second brake shaft 8, and the second turntable 72 has a second gear ring adapted to the bevel gear 73 on the side facing the support column.

[0056] Thus, the first gear ring, bevel gear 73, and second gear ring constitute a planetary gear system. When the rail vehicle travels on a curved section, the difference in distance between the inner and outer sides of the curve causes a certain difference in the rotational speed of the first running wheel 2 and the second running wheel 1. Through the transmission between the first brake shaft 4 and the second brake shaft 8, the first gear ring and the second gear ring rotate relative to each other. At this time, the bevel gear 73 located between the first gear ring and the second gear ring rotates accordingly without interfering with the rotation of the first running wheel 2 and the second running wheel 1. When the rail vehicle needs to brake (at this time, the vehicle is traveling on a straight section, and the first running wheel 2 and the second running wheel 1 maintain synchronous rotational speed), the clamps installed on the rail vehicle body clamp the annular brake disc 74. The braking force generated is transmitted through the bevel gear 73 to the first gear ring and the first brake shaft 4, and through the bevel gear 73 to the second gear ring and the second brake shaft 8, simultaneously braking the first running wheel 2 and the second running wheel 1.

[0057] Optionally, the number of bevel gears 73 is 4-12, and they are evenly distributed along the annular brake disc 74.

[0058] As an optional implementation, a non-standard bearing 3 is also included, which is disposed between the first brake shaft 4 and the second brake shaft 8.

[0059] As an optional implementation, the irregular bearing 3 includes an inner ring 31 and an outer ring 32 coaxially arranged, rollers disposed between the inner ring 31 and the outer ring 32, and a sealing ring 33, wherein:

[0060] The inner ring 31 includes an inner ring body and an inner ring connecting part protruding inward from the inner ring body. The inner ring connecting part is fixedly connected to the second brake shaft 8 and / or the second running wheel 1.

[0061] The outer ring 32 includes an outer ring body and an outer ring connecting portion protruding outward from the outer ring body. The outer ring connecting portion is fixedly connected to the first brake shaft 4 and / or the first running wheel 2.

[0062] Thus, by setting the inner ring 31 of the special-shaped bearing 3 to an inwardly protruding structure and setting the outer ring 32 of the special-shaped bearing 3 to an outwardly protruding structure, it is convenient to fix the second brake shaft 8 and the second traveling wheel 1, fix the first brake shaft 4 and the first traveling wheel 2, and rotate the first brake shaft 4 and the second brake shaft 8.

[0063] As an optional implementation, a connecting bearing 6 is also included, which is disposed between the first brake shaft 4 and the frame mounting base 5.

[0064] As an optional implementation, the first traveling wheel 2 includes:

[0065] The first wheel hub 23 is fixedly connected to the first brake shaft 4;

[0066] The first tire 21 is disposed on the outside of the first wheel hub 23;

[0067] The first safety wheel 22 is fixedly mounted on the outside of the first wheel hub 23 and located inside the first tire 21.

[0068] The outer diameter of the first safety wheel 22 is smaller than that of the first tire 21, and there is a certain radial distance between the first safety wheel 22 and the first tire 21. When the first tire 21 experiences an accident such as a blowout or air leakage, the first safety wheel 22 supports the vehicle's operation and prevents further accidents from occurring.

[0069] As an optional implementation, the second traveling wheel 1 includes:

[0070] The second wheel hub 13 is fixedly connected to the second brake shaft 8;

[0071] The second tire 11 is disposed on the outside of the second wheel hub 13;

[0072] The second safety wheel 12 is fixedly mounted on the outside of the second wheel hub 13 and located inside the second tire 11.

[0073] The outer diameter of the second safety wheel 12 is smaller than that of the second tire 11, and there is a certain radial distance between the second safety wheel 12 and the second tire 11. When the first tire 21 experiences a blowout, air leakage, or other unexpected situation, the second safety wheel 12 supports the vehicle's operation and prevents further accidents from occurring.

[0074] Those skilled in the art should understand that the discussion of any of the above embodiments is merely exemplary and is not intended to imply that the scope of this disclosure (including the claims) is limited to these examples; within the framework of this invention, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of the different aspects of the invention as described above, which are not provided in the details for the sake of brevity.

[0075] The embodiments of this invention are intended to cover all such substitutions, modifications, and variations falling within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this invention should be included within the scope of protection of this invention.

Claims

1. A straddle-type monorail vehicle running wheel mechanism, characterized in that, include: The hollow first brake shaft is rotatably connected to the frame mounting base; The first traveling wheel is fixedly mounted on the first brake shaft; The second brake shaft is concentrically disposed within the first brake shaft and is rotatably connected to the first brake shaft; The second traveling wheel is fixedly mounted on the second brake shaft, and the second traveling wheel is arranged parallel to the first traveling wheel; Braking components are respectively connected to the first brake shaft and the second brake shaft; During driving, the first and second running wheels rotate independently. During braking, the braking assembly applies braking force to the first and second brake shafts simultaneously to make the first and second running wheels brake synchronously. The braking assembly includes: The annular brake disc has multiple support columns on its inner wall; Multiple bevel gears are rotatably mounted on the multiple support columns, each corresponding to one of the support columns. The first turntable is fixedly installed on the first brake shaft, and a first gear ring adapted to the bevel gear is provided on the side of the first turntable facing the support column. The second turntable is fixedly installed on the second brake shaft, and a second gear ring adapted to the bevel gear is provided on the side of the second turntable facing the support column.

2. The straddle-type monorail vehicle running wheel mechanism according to claim 1, characterized in that, The number of bevel gears is 4-12, and they are evenly distributed along the annular brake disc.

3. The straddle-type monorail vehicle running wheel mechanism according to claim 1, characterized in that, It also includes a special-shaped bearing disposed between the first brake shaft and the second brake shaft.

4. The straddle-type monorail vehicle running wheel mechanism according to claim 3, characterized in that, The irregular bearing includes an inner ring and an outer ring arranged coaxially, rollers disposed between the inner ring and the outer ring, and a sealing ring, wherein: The inner ring includes an inner ring body and an inner ring connecting portion protruding inward from the inner ring body. The inner ring connecting portion is fixedly connected to the second brake shaft and / or the second running wheel. The outer ring includes an inner ring body and an outer ring connecting portion protruding outward from the outer ring body. The outer ring connecting portion is fixedly connected to the first brake shaft and / or the first running wheel.

5. The straddle-type monorail vehicle running wheel mechanism according to claim 1, characterized in that, It also includes a connecting bearing, which is disposed between the first brake shaft and the frame mounting base.

6. The straddle-type monorail vehicle running wheel mechanism according to claim 1, characterized in that, The first traveling wheel includes: The first wheel hub is fixedly connected to the first brake shaft; The first tire is positioned on the outside of the first wheel hub; The first safety wheel is located outside the first wheel hub and inside the first tire.

7. The straddle-type monorail vehicle running wheel mechanism according to claim 1, characterized in that, The second traveling wheel includes: The second wheel hub is fixedly connected to the second brake shaft; The second tire is positioned on the outside of the second wheel hub; The second safety wheel is located on the outside of the second wheel hub and inside the second tire.

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