Virtual track rubber wheel low-floor bogie

Abstract

The virtual track rubber wheel low-floor bogie comprises a framework, and the framework is provided with two sets of cross beams and suspension longitudinal beams arranged in the middles of the two sets of cross beams; the damping mechanisms are connected to the bottom surfaces of the two ends of the cross beam through spherical hinges, and each damping mechanism comprises two spring dampers; the wheel pair comprises an axle and wheels; the axle is connected with the damping mechanism through a cylindrical surface pair, and the wheels are arranged on the outer side of the cylindrical surface pair. Wherein the two groups of opposite damping mechanisms below the two groups of cross beams are arranged in a splayed shape; the two spring shock absorbers of each group of shock absorption mechanism are arranged in a splayed shape; the turning angle of the axle is 0-15 degrees, and the inclination angle of the axle is 0-5 degrees. The bogie is small in occupied space, suitable for a low-floor vehicle body, good in damping performance and capable of achieving self-aligning; the structure is flexible, and a plurality of carriages can be manufactured based on the structure; the device is simple in structure, low in manufacturing cost, easy to repair and low in maintenance cost.

Description

Technical Field

[0001] The present invention relates to the technical field of rail transportation, and in particular to a virtual track rubber-tyred low-floor bogie. Background Art

[0002] The bogie primary suspension is a key component in the railway vehicle bogie. It connects the car body and wheelset. Its main function is to transfer the weight and traction of the vehicle, while absorbing the impact and vibration caused by track unevenness to ensure the smooth operation and safety performance of the vehicle.

[0003] Since the beginning of the 21st century, rail trains have developed rapidly around the world for their convenience, speed and high-efficiency transportation. Virtual rail trains are a new type of medium-capacity urban transportation system. Among them, low-floor light rail vehicles are new transportation equipment in modern cities. The vehicle floor is less than 40 cm from the track surface, and some are even reduced to less than 35 cm, which is equivalent to the height of ordinary residential stairs, greatly facilitating the boarding and alighting of passengers such as the elderly and children; at the same time, the center of gravity of the carriage is lowered, which effectively improves the driving safety of the vehicle; the interior space is also more spacious, and passengers can move more conveniently in the car, which improves the riding comfort. In short, the design of low-floor carriages has shown significant advantages in passenger convenience, operational efficiency, safety, environmental protection and energy saving. These advantages not only improve the overall service level of the public transportation system, but also provide passengers with a more convenient, comfortable and safe travel experience.

[0004] At present, there is a strong demand for rotatable bogies in the domestic and international low-floor tram markets. However, the existing rotatable low-floor bogies of this type all have disadvantages to varying degrees. Summary of the invention

[0005] In view of the deficiencies in the prior art, the present invention aims to provide a bogie suitable for a low-floor vehicle body, which has self-righting properties, good shock absorption effect and flexible structure.

[0006] To achieve the above object, the present invention provides the following technical solutions: A virtual track rubber-wheeled low-floor bogie comprising: A framework having two sets of cross beams and a suspension longitudinal beam disposed in the middle of the two sets of cross beams; A shock absorbing mechanism, which is connected to the bottom surfaces of both ends of the beam through a ball hinge, and each set of the shock absorbing mechanism includes two spring shock absorbers; and A wheelset, the wheelset comprising an axle and a wheel; the axle is connected to the shock absorbing mechanism through a cylindrical pair, and the wheel is arranged on the outside of the cylindrical pair; Among them, the two groups of shock absorbing mechanisms opposite to each other under the two groups of cross beams are arranged in an "eight" shape; the two spring shock absorbers of each group of shock absorbing mechanisms are arranged in an "eight" shape; the rotation angle of the axle is 0~15°, and the inclination angle is 0~5°.

[0007] Furthermore, a hinge is welded at the bottom of the crossbeam, and the ball hinge is rotatable inside the hinge; the bottom of the ball hinge extends downward to form a hydraulic sleeve.

[0008] Furthermore, the spring shock absorber includes a connecting piece and a spring; the connecting piece includes a fixing block and a connecting sleeve rod; the spring is sleeved on the connecting sleeve rod, and the connecting sleeve rod is movably connected in the hydraulic sleeve.

[0009] Furthermore, the top four corners of the cylindrical pair are inclined upward and inward to form connecting blocks, and the outer connecting block is higher than the inner connecting block; a connecting rod is arranged between the inner and outer connecting blocks; and the bottom of the spring shock absorber is connected to the connecting rod.

[0010] Furthermore, the outer side of the cylindrical pair is provided with an embedding hole, and the wheel is tightly connected to the embedding hole via a fastener integrally formed with the surface of the wheel.

[0011] Compared with the prior art, the present invention has the following beneficial effects: 1. The uniquely configured shock-absorbing mechanism enables the train to effectively maintain the stability of straight-line driving during medium and high-speed driving, and can also help the wheels to automatically return to the correct position; and the left and right wheels will be involved with each other during bouncing, and the change in tire angle is small, resulting in less tire wear; 2. The structure is flexible and occupies little space. It can lower the height of the vehicle floor and is suitable for low-floor vehicles. When the height of the vehicle body is lowered, it is not easy to change the angle of the wheels, so that the control feel remains consistent. At the same time, the structure has a large load capacity. Based on this structure, multiple low-floor carriages can be made, which effectively improves passenger convenience, operational efficiency, safety, etc. 3. The bogie structure provided in this case has good shock absorption performance, simple structure, low manufacturing cost, easy repair and low maintenance cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 A schematic diagram of the three-dimensional structure of a virtual track rubber-tyred low-floor bogie provided for this case.

[0013] Figure 2 An exploded view of a virtual track rubber-tyred low-floor bogie provided for this case.

[0014] Figure 3 A virtual track rubber-tyred low-floor bogie steering simulation result diagram provided for this case.

[0015] Figure 4 A simulation result diagram of shock absorption of a virtual track rubber-tyred low-floor bogie provided for this case.

[0016] In the figure: 1, frame; 11, crossbeam; 12, suspension longitudinal beam; 13, hinge; 2, shock absorbing mechanism; 21, spring shock absorber; 22, connecting piece; 23, spring; 221, fixing block; 222, connecting sleeve rod; 3, ball hinge; 31, hydraulic sleeve; 4, wheelset; 41, axle; 42, wheel; 421, fastener; 5, cylinder pair; 51, connecting block; 52, connecting rod; 53, embedding hole. DETAILED DESCRIPTION

[0017] The technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. 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.

[0018] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0019] Example: like Figure 1-4 As shown, a virtual track rubber-wheeled low-floor bogie comprises: A framework 1, wherein the framework 1 has two sets of cross beams 11 and a suspension longitudinal beam 12 arranged in the middle of the two sets of cross beams 11; A shock absorbing mechanism 2, which is connected to the bottom surfaces of both ends of the beam 11 through a ball hinge 3, and each set of the shock absorbing mechanism 2 includes two spring shock absorbers 21; and The wheelset 4 comprises an axle 41 and a wheel 42; the axle 41 is connected to the shock absorbing mechanism 2 via a cylindrical pair 5, and the wheel 42 is arranged on the outer side of the cylindrical pair 5; the outer side of the cylindrical pair 5 has an embedding hole 53, and the wheel 42 is tightly connected to the embedding hole 53 via a fastener 421 integrally formed with the surface of the wheel 42.

[0020] Reference Figure 2 The bottom of the crossbeam 11 is welded with a hinge 13, and the ball hinge 3 can rotate in the hinge 13; the bottom of the ball hinge 3 extends downward to form a hydraulic sleeve 31. The spring shock absorber 21 includes a connecting member 22 and a spring 23; the connecting member 22 includes a fixing block 221 and a connecting sleeve rod 222; the spring 23 is sleeved on the connecting sleeve rod 222, and the connecting sleeve rod 222 is movably connected in the hydraulic sleeve 31.

[0021] The top four corners of the cylindrical pair 5 are inclined upward and inward to form connecting blocks 51, and the outer connecting blocks 51 are higher than the inner connecting blocks 51; a connecting rod 52 is arranged between the inner and outer connecting blocks 51; and the bottom of the spring shock absorber 21 is connected to the connecting rod 52. Through this structural design, the two groups of shock absorbing mechanisms 2 facing each other under the two groups of cross beams 11 are arranged in an "eight" shape; in addition, the two spring shock absorbers 21 of each group of shock absorbing mechanisms 2 are also arranged in an "eight" shape.

[0022] Through motion simulation analysis (refer to patent 2021111205556 algorithm simulation analysis), the structure can ensure that the maximum turning angle α of the axle 41 is 15°, ensuring that it can pass through a curve with a turning radius of 10 m. The steering simulation results are as follows Figure 3 As shown. Within the shock absorbing stroke of the spring shock absorber 2, the maximum inclination angle β of the axle 41 is 5°, and the shock absorbing simulation results are shown in Figure 4 shown.

[0023] This structure allows the train to effectively maintain the stability of straight-line driving when traveling at medium and high speeds. It can also help the wheels to automatically return to the center, effectively curb the swing of the shock absorbing mechanism, make steering lighter, and the left and right wheels will be involved with each other when bouncing. The small change in tire angle reduces tire wear.

[0024] Although the embodiments of the present invention have been disclosed as above, they are not limited to the applications listed in the specification and the implementation modes, and they can be fully applied to various fields suitable for the present invention. For those familiar with the art, additional modifications can be easily implemented. Therefore, without departing from the general concept defined by the claims and the scope of equivalents, the present invention is not limited to the specific details and the illustrations shown and described herein.

Claims

1. A virtual track rubber-tyred low-floor bogie, characterized in that: include: A framework (1), the framework (1) comprising two groups of cross beams (11) and a suspension longitudinal beam (12) arranged in the middle of the two groups of cross beams (11); A shock absorbing mechanism (2) connected to the bottom surfaces of both ends of the crossbeam (11) via a ball hinge (3), each set of the shock absorbing mechanism (2) comprising two spring shock absorbers (21); and A wheelset (4), the wheelset (4) comprising an axle (41) and a wheel (42); the axle (41) is connected to the shock absorbing mechanism (2) via a cylindrical pair (5), and the wheel (42) is arranged on the outside of the cylindrical pair (5); The two groups of shock absorbing mechanisms (2) facing each other under the two groups of cross beams (11) are arranged in an "eight" shape; the two spring shock absorbers (21) of each group of shock absorbing mechanisms (2) are arranged in an "eight" shape; the rotation angle of the axle (41) is 0-15°, and the inclination angle is 0-5°.

2. The virtual track rubber-tyred low-floor bogie according to claim 1, characterized in that: A hinge (13) is welded to the bottom of the crossbeam (11), and the ball hinge (3) is rotatable within the hinge (13); the bottom of the ball hinge (3) extends downward to form a hydraulic sleeve (31).

3. The virtual track rubber-tyred low-floor bogie according to claim 2, characterized in that: The spring shock absorber (21) comprises a connecting piece (22) and a spring (23); the connecting piece (22) comprises a fixing block (221) and a connecting sleeve rod (222); the spring (23) is sleeved on the connecting sleeve rod (222), and the connecting sleeve rod (222) is movably connected in the hydraulic sleeve (31).

4. The virtual track rubber-tyred low-floor bogie according to claim 1, characterized in that: The top four corners of the cylindrical pair (5) are inclined upward and inward to form connecting blocks (51), and the outer connecting block (51) is higher than the inner connecting block (51); a connecting rod (52) is provided between the inner and outer connecting blocks (51); and the bottom of the spring shock absorber (21) is connected to the connecting rod (52).

5. The virtual track rubber-tyred low-floor bogie according to claim 1, characterized in that: The outer side of the cylindrical pair (5) is provided with an embedding hole (53), and the wheel (42) is tightly connected to the embedding hole (53) via a fastener (421) integrally formed with the surface of the wheel (42).

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