CN109624599B

CN109624599B - Anti-failure elastic wheel for rail transit

Info

Publication number: CN109624599B
Application number: CN201811430491.8A
Authority: CN
Inventors: 田建辉; 鲁星星; 肖坎
Original assignee: Xian Technological University
Current assignee: Xian Technological University
Priority date: 2018-11-28
Filing date: 2018-11-28
Publication date: 2021-09-03
Anticipated expiration: 2038-11-28
Also published as: CN109624599A

Abstract

The invention belongs to the technical field of rail transit, and particularly relates to an anti-failure elastic wheel for rail transit. The problem of the prior art exist that the wheel center can't restrict the tangential slip of wheel hub after the rubber layer became invalid, lead to the incident of the unable normal braking of vehicle is solved in order to overcome. The technical scheme adopted by the invention comprises a wheel center, a compression ring and a wheel hub, wherein L-shaped wheel center bosses are uniformly distributed on the inner side of the outer edge of the wheel center, equal number of L-shaped compression ring bosses are uniformly distributed on the inner side of the outer edge of the compression ring, the compression ring is pressed on the wheel center, and the wheel center bosses and the end parts of the horizontal sections of the compression ring bosses are butted to form a U-shaped piece; the surface of the annular body on the inner side of the hub is provided with U-shaped grooves which have the same number as the bosses on the wheel center and can be butted in shape; the U-shaped groove is internally butted with the U-shaped parts, and U-shaped rubber bodies are embedded in cavities formed between the U-shaped parts.

Description

Anti-failure elastic wheel for rail transit

Technical Field

The invention belongs to the technical field of rail transit, and particularly relates to an anti-failure elastic wheel for rail transit.

Background

With the development of science and technology and economy, urban rail transit is widely favored by people as a fast and safe traffic mode. At present, the elastic wheel technology is generally applied to rail vehicles at home and abroad to relieve the noise generated by the running of the vehicles.

The damping layer of the elastic wheel is mostly made of composite rubber. The rubber layer fails due to factors such as abrasion, creep and high temperature in the running process of the wheel, so that the torque generated by the wheel center cannot be normally transmitted to the wheel hub, the elastic wheel fails, the rail vehicle cannot normally advance or brake, the occurrence probability of rail vehicle safety accidents is increased, the safety of urban rail transit is reduced, and the subsequent popularization of the elastic wheel is not facilitated.

Disclosure of Invention

In order to solve the problems, the invention aims to provide an anti-failure elastic wheel for rail transit, so as to solve the problem of safety accidents that a wheel center cannot limit tangential slip of a wheel hub after a rubber layer fails and a vehicle cannot be normally braked in the prior art.

In order to achieve the purpose of the invention, the technical scheme provided by the invention is as follows: the rail transit anti-failure elastic wheel consists of a wheel center, a compression ring and a wheel hub, wherein L-shaped wheel center bosses are uniformly distributed on the inner side of the outer edge of the wheel center, equal-quantity L-shaped compression ring bosses are uniformly distributed on the inner side of the outer edge of the compression ring, the compression ring is pressed on the wheel center, and the end parts of the wheel center bosses and the horizontal sections of the compression ring bosses are butted to form a U-shaped piece; the surface of the annular body on the inner side of the hub is provided with U-shaped grooves which have the same number as the bosses on the wheel center and can be butted in shape;

the U-shaped groove is internally butted with the U-shaped parts, and U-shaped rubber bodies are embedded in cavities formed between the U-shaped parts.

The wheel center boss and the pressure ring boss correspond to the circumferential angle A groove in the arc length direction and correspond to the circumferential angle B in the arc length direction, and the relationship of the circumferential angle C corresponding to the rubber body in the arc length direction is as follows:

(A＋C)×12＝360°，B－A＝2-4°。

the U-shaped groove equally divides the surface of the annular body on the inner side of the hub into a plurality of arc surfaces, and the radius of the arc surface of each arc surface is gradually reduced along the same rotating direction by 3-5 mm; the radius of the arc surface of the U-shaped piece is gradually reduced along the same rotating direction, and the reduction is 1.5-2.5 mm.

The surface of the annular body on the inner side of the hub is equally divided into 12 sections of arc surfaces by the U-shaped groove, the radius of the arc surface of each section of arc surface is gradually reduced along the same rotating direction, and the reduction is 3 mm; the radius of the arc surface of the inner arc surface of the U-shaped part is gradually reduced along the same rotating direction, and the reduction is 1.5 mm.

Compared with the prior art, the invention has the advantages that:

the invention optimizes the typical fault of the prior elastic wheel that the inner and outer rings of the elastic wheel slip relatively, and the inner and outer rings of the elastic wheel slip relatively when the rubber layer is abnormal.

Drawings

FIG. 1 is an exploded view of the structure of the present invention;

FIG. 2 is a left side view of the structure of the present invention;

FIG. 3 is a cross-sectional view A-A of FIG. 2;

FIG. 4 is a schematic view of the relationship between the rubber layer and the wheel center;

FIG. 5 is a cross-sectional view B-B of FIG. 4;

FIG. 6 is a schematic view of a "U" shaped groove in the hub;

FIG. 7 is a cross-sectional view C-C of FIG. 6;

FIG. 8 is a schematic view showing a relationship between the wheel center and the wheel center boss of the pressure ring;

FIG. 9 is a schematic view of the relationship between the wheel center and the wheel hub during normal operation of the wheel;

FIG. 10 is a schematic view of the relationship between the wheel center and the wheel hub when the rubber layer is abnormal;

in the figure, 1-wheel hub, 2-wheel center, 3-pressure ring, 4-wheel center boss, 5-pressure ring boss, 6-U-shaped groove and 7-rubber body.

Detailed Description

The invention is explained below with reference to the figures and examples

Referring to fig. 1 to 3, the embodiment provides an anti-failure elastic wheel for rail transit, which is composed of a wheel center 2, a compression ring 3 and a wheel hub 1;

12L-shaped wheel center bosses 4 are uniformly distributed on the inner side of the outer edge of the wheel center 2, 12L-shaped pressure ring bosses 5 are uniformly distributed on the inner side of the outer edge of the pressure ring 3, the pressure ring 3 is pressed on the wheel center 2, the end parts of the horizontal sections of the wheel center bosses 4 and the pressure ring bosses 5 are butted to form a U-shaped piece, and a U-shaped rubber body 7 is embedded in a cavity formed between the U-shaped pieces; the surface of the annular body on the inner side of the hub 1 is provided with U-shaped grooves which have the same number as the boss 4 of the hub and can be butted in shape, and referring to fig. 8, the U-shaped grooves are butted with U-shaped pieces.

Referring to FIGS. 4-7: the wheel center boss 4 and the pressure ring boss 5 correspond to the circumferential angle A in the arc length direction, the groove corresponds to the circumferential angle B in the arc length direction, and the rubber body 7 corresponds to the circumferential angle C in the arc length direction; the relationship of (1) is:

(A＋C)×12＝360°，B－A＝2-4°。

the U-shaped groove equally divides the surface of the annular body on the inner side of the hub 1 into 12 sections of arc surfaces, and the radius of the arc surface of each section of arc surface is gradually reduced along the same rotating direction by 3-5 mm; the radius of the arc surface of the U-shaped piece is gradually reduced along the same rotating direction, and the reduction is 1.5-2.5 mm.

The inner circle surface of the annular convex body among the U-shaped grooves is gradually reduced along the arc surface radius in the same rotating direction, the reduction is 3mm in the embodiment, the outer arc surface of the U-shaped pieces is gradually reduced along the arc surface radius in the same rotating direction, and the reduction is 1.5mm in the embodiment. The function is that the fit relationship gradually changes from clearance fit to interference fit when the excircle surface of the U-shaped piece is matched with the inner circle end surface of the annular convex body between the U-shaped grooves.

In the embodiment, 12 wheel center bosses 4, compression ring bosses 5, U-shaped grooves 6 and rubber bodies 7 are arranged, the rubber bodies 7 are in interference fit with the inner walls of cavities between the U-shaped parts under the condition that wheels are not loaded, and the interference range is 6% -14% of the thickness of each position of each rubber body;

referring to fig. 9: when the elastic property of the rubber body 7 is normal, the U-shaped part is positioned at the bottom of the U-shaped groove 6, and the reserved gap value between the U-shaped groove 6 and the U-shaped part is 3-5mm (the gap value is determined according to the limit elastic deformation of the rubber body 7), so that the normal elastic deformation of the rubber body 7 is not hindered.

Referring to fig. 10: when the rubber layer is invalid or damaged, a gap is formed between the hub and the wheel center, the wheel center is continuously kept at the original rotating speed due to the torque generated by the transmission shaft, the hub cannot normally transmit the torque, so that the rotating speed of the hub is different from that of the wheel center, the U-shaped part slides out of the U-shaped groove 6 of the hub, the surface of the U-shaped part is in contact with the inner circular surface of the annular convex body between the U-shaped grooves 6 on the hub 1 to form interference fit, the elastic wheel is converted into a rigid wheel, the torque of the wheel center is transmitted to the hub again, the wheel is normally operated, and the vehicle cannot be normally braked.

When the rubber layer is abnormal, the radius of the arc surface of the inner circle surface of the annular convex body between the surface of the U-shaped piece and the U-shaped groove 6 is gradually reduced along the same rotating direction, and when a railway vehicle runs along the same direction, the fit relation between the U-shaped piece and the U-shaped groove is gradually changed from clearance fit to interference fit, so that the fit relation between the two parts is enhanced.

The invention is not limited to the examples, and any equivalent changes to the technical solution of the invention by a person skilled in the art after reading the description of the invention are covered by the claims of the invention.

Claims

1. Elastic wheel that became invalid is prevented to track traffic, its characterized in that: the wheel is characterized by comprising a wheel center (2), a compression ring (3) and a wheel hub (1), wherein L-shaped wheel center bosses (4) are uniformly distributed on the inner side of the outer edge of the wheel center (2), L-shaped compression ring bosses (5) with equal quantity are uniformly distributed on the inner side of the outer edge of the compression ring (3), the compression ring (3) is pressed on the wheel center (2), and the end parts of the horizontal sections of the wheel center bosses (4) and the compression ring bosses (5) are butted to form a U-shaped part; the surface of the ring body on the inner side of the hub (1) is provided with U-shaped grooves which have the same number as the wheel center bosses (4) and can be butted in shape;

the U-shaped groove is internally butted with a U-shaped member, and a U-shaped rubber body (7) is embedded in a cavity formed between the U-shaped members;

wheel center boss (4) and clamping ring boss (5) correspond circumference angle A in the arc length direction, "U" shape recess corresponds circumference angle B in the arc length direction, the rubber body (7) is in the relation of the circumference angle C that the arc length direction corresponds:

(A＋C)×12＝360°，B－A＝2-4°；

the surface of the annular body on the inner side of the hub (1) is equally divided into a plurality of arc surfaces by the U-shaped groove, the radius of the arc surface of each arc surface is gradually reduced along the same rotating direction, and the reduction is 3-5 mm; the radius of the arc surface of the U-shaped piece is gradually reduced along the same rotating direction, and the reduction is 1.5-2.5 mm.

2. The rail transit failure-prevention resilient wheel of claim 1, wherein: the surface of the annular body on the inner side of the hub (1) is equally divided into 12 sections of arc surfaces by the U-shaped groove, the radius of the arc surface of each section of arc surface is gradually reduced along the same rotating direction, and the reduction is 3 mm; the radius of the arc surface of the inner arc surface of the U-shaped part is gradually reduced along the same rotating direction, and the reduction is 1.5 mm.