BOGIE WHEELSET RADIAL MECHANISM WITH STRUCTURE OF ADJUSTABLE RIGIDITY

MECANISME RADIAL D'ESSIEU DE BOGIE AVEC STRUCTURE A RIGIDITE REGLABLE

English Abstract

A bogie wheelset radial mechanism with a structure of adjustable rigidity,
composing two
secondary frames (21) which are pin-connected via two connecting rods (22)
arranged in a
crosswise manner. The connecting rods (22) are pin-connected to the secondary
frames (21) with
round pins (24). Joints between the round pins (24) and the connecting rods
(22) and/or joints
between the round pins and the secondary frames (21) are provided with
replaceable elastic
materials. The materials can be made into rings. End portions of the
connecting rods (22) are
embedded into mounting grooves (25) located in the secondary frames (21) and
are connected to
the same with the round pins (24).

French Abstract

La présente invention concerne un mécanisme radial d'essieu de bogie ayant une structure dont la rigidité est réglable. Le mécanisme est composé de cadres secondaires avant et arrière (21) qui sont reliés par broche par l'intermédiaire de deux tiges de liaison (22) agencées de manière transversale. Les tiges de liaison (22) sont reliées par broche aux cadres secondaires (21) par l'intermédiaire de broches rondes (24). Des joints entre les broches rondes (24) et les tiges de liaison (22) et/ou des joints entre les broches rondes et les cadres secondaires (21) sont dotés de matériaux élastiques remplaçables. Les joints entre les broches rondes (24) et les tiges de liaison (22) et/ou les joints entre les broches rondes et les cadres secondaires (21) sont dotés d'anneaux (23) constitués des matériaux élastiques remplaçables. Des parties extrémité des tiges de liaison (22) sont incorporées dans des rainures de montage (25) situées dans les cadres secondaires (21) et sont reliées par broche à celles-ci par l'intermédiaire des broches rondes (24). Les parties extrémité des tiges de liaison (22) sont situées sur un plan de montage supérieur (31) ou un plan de montage inférieur (32) des cadres secondaires (21) et sont reliées par broche à celles-ci par l'intermédiaire des broches rondes (24). En fournissant les matériaux élastiques remplaçables, qui ont des effets tampon et d'amortissement, des forces d'impact entre les broches rondes (24) et les cadres secondaires (21) et entre les broches rondes (24) et les tiges de liaison (22) sont efficacement réduites, ce qui permet d'améliorer davantage la fiabilité d'utilisation des cadres secondaires (21) et des tiges de liaison (22), et de réduire le risque de défaillance structurelle de chaque partie.

Claims

Claims
1. A bogie wheelset radial mechanism with a structure which is of adjustable
rigidity, the wheelset
radial mechanism being composed of two secondary frames which are pin-
connected via two
connecting rods arranged in a crosswise manner, wherein the connecting rods
are pin-connected to
the secondary frames via round pins, and joints between the round pins and the
connecting rods
and/or joints between the round pins and the secondary frames are provided
with elastic rings
made of replaceable elastic materials according to rigidity requirements of
the bogie wheelset
radial mechanism, the elastic rings are mounted in middle holes of the
secondary frames, and the
connecting rods are located on upper mounting planes or lower mounting planes
of the secondary
frames.
2. The bogie wheelset radial mechanism with the structure which is of
adjustable rigidity
according to claim 1, wherein end portions of the connecting rods are embedded
into mounting
grooves located in the secondary frames and are pin-connected to same via the
round pins.
3. The bogie wheelset radial mechanism with the structure which is of
adjustable rigidity
according to claim 1, wherein the end portions of the connecting rods are
located on the upper
mounting planes or the lower mounting planes of the secondary frames and are
pin-connected to
same via the round pins.

Description

CA 03069778 2020-01-13
Description
Bogie Wheelset Radial Mechanism with Structure of Adjustable Rigidity
Technical Field
The invention relates to the technical field of railway transportation
equipment, in particular to a
rigidity-adjustable structure of a wheelset radial mechanism of a secondary
frame type radial
bogie of a railway freight car.
Background Art
As is well known, a wheelset radial mechanism of a secondary frame type radial
bogie of a
railway freight car can provide the bogie with large shear rigidity and small
bending rigidity, so
that the bogie has linear high-speed runnability and excellent curve passing
capacity. Thus, there is
clearly a strong correlation between the wheelset radial mechanism and the
shear rigidity and
bending rigidity of the bogie.
Structurally, the wheelset radial mechanism is formed by crosswise pin-
connection of front and
rear secondary frames with two connecting rods, the two secondary frames and
the two connecting
rods are connected in series, and the two connecting rods are connected in
parallel. Thus, the
rigidity of the wheelset radial mechanism is related to the cross angles
between the secondary
frames and the connecting rods and between the connecting rods.
Due to space limitation, the existing secondary frame type radial bogie is
designed in a way that
the cross angles between the secondary frames and the connecting rods and
between the
connecting rods in the wheelset radial mechanism are generally not easy to
change, and the
rigidity of the wheelset radial mechanism is generally very large, which
results in that although the
secondary frame type radial bogie can have the basic characteristics of a
radial bogie, its operation
performance cannot reach the optimal state, and the characteristics of the
radial bogie have not
been fully brought into play.
Summary of the Invention
The invention discloses a bogie wheelset radial mechanism with a structure of
adjustable rigidity
according to the defects of the prior art.
The invention aims to provide a structure capable of realizing rigidity
adjustment of a wheelset
radial mechanism, so that the rigidity of the wheelset radial mechanism tends
to be within a
reasonable range and the performance of a radial bogie is improved; and the
structure does not
affect the structure and arrangement of other parts of the bogie, especially
the wheelset radial
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mechanism.
The invention is realized by the following technical scheme:
A bogie wheelset radial mechanism with a structure which is of adjustable
rigidity is provided.
The wheelset radial mechanism is composed of front and rear secondary frames
which are
pin-connected via two connecting rods arranged in a crosswise manner, and is
characterized in that
the connecting rods are pin-connected to the secondary frames via round pins,
and joints between
the round pins and the connecting rods and/or joints between the round pins
and the secondary
frames are provided with replaceable elastic materials.
The joints between the round pins and the connecting rods and/or the joints
between the round
pins and the secondary frames are provided with rings made of the replaceable
elastic materials.
End portions of the connecting rods are embedded into mounting grooves located
in the secondary
frames and are pin-connected to same via the round pins.
The end portions of the connecting rods are located on upper mounting planes
or lower mounting
planes of the secondary frames and are pin-connected to same via the round
pins.
According to the invention, the elastomer materials with certain rigidity are
arranged at the joints
between the secondary frames and the connecting rods, which means the rigidity
of the wheelset
radial mechanism is related to the series connection of the secondary frames
and the connecting
rods via the elastic materials, thus increasing the adaptation range of the
rigidity of the wheelset
radial mechanism; besides, by replacing and setting elastic materials with
different rigidity
parameters, the rigidity of the wheelset radial mechanism can be adjusted
without changing the
structures of the secondary frames, the connecting rods and the like and the
arrangement thereof in
the bogie. The elastic materials can be made into parts with elasticity, such
as the rings arranged at
the joints between the round pins and the connecting rods and/or the joints
between the round pins
and the secondary frames, the elastic materials can be rubber, polyester
elastomer and the like, and
rings with different rigidities can be mounted according to rigidity
requirements.
By adopting the method, the rigidity of the wheelset radial mechanism can be
effectively adjusted,
and the shear rigidity and the bending rigidity of the bogie can be adjusted
accordingly, so that the
linear and curvilinear runnability of the bogie can be greatly improved.
By adopting the method of the invention to control the rigidity of the
wheelset radial mechanism,
the load between the secondary frames and the connecting rods can be reduced
by 10% to 50%,
and the smaller the curve radius through which the bogie passes, the more
obvious the effect,
thereby improving the use reliability of the secondary frames and the
connecting rods and
reducing the risk of structural failure of each part.
By providing the replaceable elastic materials, which have buffering and
damping effects, impact
forces between the round pins and the secondary frames and between the round
pins and the
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connecting rods are effectively reduced, thereby further improving the use
reliability of the
secondary frames and the connecting rods, and reducing the risk of structural
failure of each part.
Brief Description of the Drawings
Fig. 1 is a schematic diagram (isometric diagram) of a general secondary frame
type radial bogie;
Fig. 2 is a schematic diagram (isometric diagram) of a general wheelset radial
mechanism 13;
Fig. 3 is an exploded view of a wheelset radial mechanism designed according
to the present
invention;
Fig. 4 is a schematic diagram of one mounting mode of an elastomer designed
according to the
present invention;
Fig. 5 is a schematic diagram of a second mounting mode of the elastomer
designed according to
the present invention; and
Fig. 6 is a schematic diagram of a connecting rod matched with the second
mounting mode of the
elastomer designed according to the present invention.
Reference numerals in the drawings:
11-wheelset and bearing, 12-side frame, 13-wheelset radial mechanism, 14-
bolster, 21-secondary
frame, 22-connecting rod, 23-elastic ring, 24-round pin and other connectors,
25-mounting groove,
21'-secondary frame II, 22'-connecting rod II, 31-upper mounting plane, 32-
lower mounting plane.
Detailed Description of the Invention
The present invention will be described in detail below by way of embodiments,
which are only
used to further illustrate the present invention, but should not be construed
as limiting the scope of
protection of the present invention. Some non-essential improvements and
adjustments made by
those skilled in the art in accordance with the above-mentioned contents of
the present invention
also fall within the scope of protection of the present invention.
With reference to attached drawings,
a bogie wheelset radial mechanism with a structure which is of adjustable
rigidity is provided, the
wheelset radial mechanism 13 is composed of two secondary frames 21, a front
secondary frame
and a rear secondary frame, which are pin-connected via two connecting rods 22
arranged in a
crosswise manner, the connecting rods 22 are pin-connected to the secondary
frames 21 via round
pins 24, and joints between the round pins 24 and the connecting rods 22
and/or joints between the
round pins and the secondary frames 21 are provided with replaceable elastic
materials.
The joints between the round pins 24 and the connecting rods 22 and/or the
joints between the
round pins and the secondary frames 21 are provided with rings 23 made of the
replaceable elastic
materials. Rings 23 made of elastic materials with different rigidities can be
mounted according to
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different requirements of the radial mechanism.
End portions of the connecting rods 22 are embedded into mounting grooves 25
located in the
secondary frames 21 and are pin-connected to same via the round pins 24.
The end portions of the connecting rods 22 are located on upper mounting
planes 31 or lower
mounting planes 32 of the secondary frames 21 and are pin-connected to same
via the round pins
24.
A connecting structure according to the present invention is that the end
portions of the connecting
rods 22 are embedded into the mounting grooves 25 located in the secondary
frames 21 and are
pin-connected to same via the round pins 24, as shown in Figs. 3 and 4.
Another connecting structure according to the present invention is that the
end portions of the
connecting rods 22 are located on the upper mounting planes 31 or the lower
mounting planes 32
of the secondary frames 21 and are pin-connected to same via the round pins
24, as shown in Figs.
and 6.
Fig. 1 is a structure of a general secondary frame type radial bogie of a
railway freight car, which
mainly consists of a wheelset and bearing 11, a side frame 12, a wheelset
radial mechanism 13, a
bolster 14 and the like.
Fig. 2 is a structure of a general wheelset radial mechanism 13, which mainly
consists of two
secondary frames 21 and two connecting rods 22 which are pin-connected via
round pins 24, and
the connection must have rotational freedom.
Figs. 3 and 4 show an embodiment of the present invention, in which the
elastic rings 23 are
additionally arranged at the joints between the secondary frames 21 and the
connecting rods 22,
which are two main components of the wheelset radial mechanism 13, and form a
series
connection relationship with the secondary frames 21 and the connecting rods
22, and the elastic
rings 23 are mounted in end holes of the connecting rods 22.
Figs. 5 and 6 show another embodiment of the present invention, in which the
elastic rings 23 are
mounted in middle holes of the secondary frames II 21', the connecting rods II
22' are still
pin-connected to the secondary frames II 21 in a crosswise manner, and the
connecting rods II 22'
can be located on the upper mounting planes 31 or the lower mounting planes 32
of the secondary
frames II 21'.
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Representative Drawing