EP3617031B1

EP3617031B1 - Railway train and electric motor suspension mechanism thereof

Info

Publication number: EP3617031B1
Application number: EP17935481.6A
Authority: EP
Inventors: Jun Fan; Ansi GU; Jiyou YANG
Original assignee: CRRC Changchun Railway Vehicles Co Ltd
Current assignee: CRRC Changchun Railway Vehicles Co Ltd
Priority date: 2017-12-22
Filing date: 2017-12-28
Publication date: 2022-05-11
Anticipated expiration: 2037-12-28
Also published as: WO2019119502A1; MY197058A; EP3617031A1; EP3617031A4

Description

The invention claims the priorities to Chinese patent application No 201711408522.5 . titled "RAILWAY TRAIN AND ELECTRIC MOTOR SUSPENSION MECHANISM THEREOF" and Chinese patent application No 201721827946.0. titled "RAILWAY TRAIN AND ELECTRIC MOTOR SUSPENSION MECHANISM THEREOF", filed with the China National Intellectual Property Administration on December 22, 2017 .

FIELD

The present invention relates to the field of railway trains, and in particular relates to a suspension mechanism for mounting a motor of a railway train. Besides, the present invention further relates to a railway train having the suspension mechanism for mounting the motor.

BACKGROUND

A multiple-unit train is one type of railway trains, which includes at least two locomotives or powered carriages and multiple non-powered carriages. The multiple-unit train is developed from double heading locomotive, but is different from the traditional double heading locomotive. Double heading locomotive, with an increasing number of locomotives rather than changing the fact of the carriage being a trailer, is generally used for freight trains and mainly solves a problem of insufficient tractive force. However, the multiple-unit train is almost used for passenger trains only, and mainly solves problems of insufficient acceleration and restricted maximum speed. Driving devices of the passenger train may be arranged in multiple passenger carriages respectively, so that these carriages are powered, while a heading locomotive of the passenger train may become a trailer which only has a console but without the driving force.
In a multiple-unit train, each carriage is equipped with a driving device, and a heading locomotive may blend into the carriage, or there is no heading locomotive, and the train is entirely controlled by a railway system. This multiple-unit train is mainly used in some urban railway transport trains such as maglev trains, APM (Automated People Mover) trains and ultra-high speed test trains and so on. The multiple-unit train generally includes two locomotives, multiple powered carriages and non-powered carriages. In some multiple-unit trains, the driving device in the heading locomotive is removed, and only control equipment of the train is kept.
In the above multiple-unit train, a motor is required to be suspended from a bogie. Since the traction motor is movable with respect to a bogie frame in a direction parallel to a main shaft of the motor, a position-limiting device is required to be provided between the motor and the bogie frame in order to avoid an excessive range of motion. Meanwhile, in order to prevent the motor from falling off in a case of suspension failure, a safety mechanism for preventing the motor from falling off is required to be provided on the motor or the frame. US 4,228,739 A discloses a system for suspending the traction motor and gear box of a parallel drive arrangement in a railway truck or the like in which the gear box and traction motor shafts are flexibly coupled together to accommodate relative movement between the two shafts. In addition, an arrangement is provided by which the mounting of the motor on the railway truck accommodates lateral displacement while the coupling between the traction motor housing and the gear box accommodates angular and offset misalignment of the coupled shafts.
However, the most common manner for position-limiting at present is to provide a rigid stop or a single elastic stop, and the most common manner for preventing the motor from falling off is to provide a joist on the motor, or to provide a safety hook between the motor and the frame. The suspension and position-limitation of the motor cannot be realized at the same time through the above manners, resulting in a complex structure and a large occupied space of the equipment, which is not beneficial to the installation and maintenance.
Therefore, a technical problem to be addressed by those skilled in the art is to provide a suspension mechanism for mounting the motor which can realize the suspension and position-limitation of the motor, simplify the structure, save space, and facilitate the installation and maintenance.

SUMMARY

An object of the present invention is to provide a suspension mechanism for mounting a motor which can realize the suspension and position-limitation of a motor, simplify the structure, reduce an occupied space, and facilitate the installation and maintenance. Another object of the present invention is to provide a railway train having the suspension mechanism for mounting the motor.
In order to address the above technical problems, a suspension mechanism for mounting the motor of a railway train is provided according to claim 1.
The connector includes two connecting plates arranged in parallel, a front side edge of the connecting plate is connected to the bogie frame, two opposite positioning holes are provided in the two connecting plates, respectively, and two ends of the safety pin are mounted in the two positioning holes, respectively.
Each connecting plate is vertically arranged and substantially P-shaped, a right angle portion at a side, facing the motor, of each connecting plate is smoothly transitioned to form a cambered edge, and the safety pin is arranged at a head portion, having a relatively large width, of each connecting plate.
Preferably, an end, close to the safety pin, of the cantilever is provided with a connecting hole horizontally penetrating an end portion of the cantilever, a penetration direction of the connecting hole is perpendicular to an extension direction of the cantilever, the connecting hole is sleeved on the safety pin, and in clearance fit with the safety pin.
Preferably, the cantilever is sleeved on the safety pin; in a radial direction perpendicular to the length direction of the safety pin, the cantilever includes an inner ring and an outer ring, the inner ring is in clearance fit with the safety pin through the connecting hole, and the outer ring is connected to the motor.
Preferably, the suspension mechanism for mounting the motor includes two elastic position-limiting pieces sleeved on two ends of the safety pin, respectively, end portions of the two elastic position-limiting pieces are fixedly connected to inner side plate surfaces of the two connecting plates respectively, and the end portion of the cantilever is located between the two elastic position-limiting pieces and is spaced apart from the two elastic position-limiting pieces.
Preferably, each of the two elastic position-limiting pieces includes a mounting seat fixedly connected to the inner side plate surface of the connecting plate and a spring arranged in the mounting seat and sleeved on the safety pin, and a bottom surface of the mounting seat is provided with a through hole for the safety pin to penetrate.
Preferably, an end away from the mounting seat of the spring is provided with an end cover, and the end cover is provided with a through hole for the safety pin to penetrate.
Preferably, the mounting seat is connected to the connecting plate by bolts.
Preferably, the end cover is specifically a rubber cover.
A railway train is provided according to claim 9.
The suspension mechanism for mounting the motor of a railway train is provided according to the present invention which is defined by the technical features set forth in claim The connector is connected to the bogie frame, the cantilever is connected to the motor, and the cantilever and the connector are connected by the safety pin, so that the motor and the bogie frame are connected. In the case that other suspension components fail, the suspension of the motor can be realized through the cantilever, and the position limitation of the motor can be realized through the elastic position-limiting piece on the safety pin, that is, when realizing the position limitation of the motor, multiple safeguards are provided for the suspension of the motor, and the suspension mechanism has a simple and compact overall structure, saves space, facilitates installation and is beneficial to manufacture, operation and maintenance.
A railway train including the suspension mechanism for mounting the motor is further provided according to the present invention. Since the suspension mechanism for mounting the motor has the above technical effects, the railway train having the suspension mechanism for mounting the motor also has the same technical effects, which will not be described in detail herein.

BRIEF DESCRIPTION OF THE DRAWINGS

Figure 1 is a schematic view showing the structure of a specific embodiment of a suspension mechanism for mounting a motor provided according to the present invention;
Figure 2 is a sectional schematic view showing a specific embodiment of the suspension mechanism for mounting the motor provided according to the present invention.

DETAIL DESCRIPTION

An object of the present invention is to provide a suspension mechanism for mounting the motor which can realize the suspension and position-limitation of a motor, simplify the structure, reduce an occupied space, and facilitate the installation and maintenance. Another object of the present invention is to provide a railway train having the suspension mechanism for mounting the motor.
For those skilled in the art to better understand the technical solutions according to the present invention, the present invention will be further described in detail as follows in conjunction with the accompany drawings and the specific embodiments.
Referring to Figures 1 and 2, Figure 1 is a schematic view showing the structure of a specific embodiment of a suspension mechanism for mounting a motor provided according to the present invention; and Figure 2 is a sectional schematic view showing a specific embodiment of the suspension mechanism for mounting the motor provided according to the present invention.
A suspension mechanism for mounting the motor of a railway train is provided according to a specific embodiment of the present invention including a connector for connecting to a bogie frame, a safety pin 2 mounted on the connector and arranged horizontally, and a cantilever 3. One end of the cantilever 3 is connected to a motor 5, and another end of the cantilever 3 is movably connected to the safety pin 2 and can move in a length direction of the safety pin 2, and the safety pin 2 is provided with an elastic position-limiting piece 4 for limiting a moving range of the cantilever 3.
The connector is connected to the bogie frame, the cantilever 3 is connected to the motor 5, and the cantilever 3 and the connector are connected by the safety pin 2, so that the motor 5 and the bogie frame are connected. In the case that other suspension components fail, the suspension of the motor 5 can be realized through the cantilever 3, and the position limitation for the motor 5 can be realized through the elastic position-limiting piece 4 on the safety pin 2, that is, when realizing the position limitation for the motor 5, multiple safeguards are provided for the suspension of the motor, which has a simple and compact overall structure, saves space, facilitates installation and is beneficial to manufacture, operation and maintenance.
Specifically, the connector includes two connecting plates 1 arranged in parallel, and a front side edge of each connecting plate 1 is configured to be connected to the bogie frame, two opposite positioning holes are provided in the two connecting plates 1 respectively, and two ends of the safety pin 2 are mounted in the two positioning holes respectively. Each connecting plate 1 is vertically arranged and substantially P-shaped, and a right angle portion at a side, facing the motor 5, of each connecting plate is smoothly transitioned to form a cambered edge. The safety pin 2 is arranged at a head portion, having a relatively large width, of each connecting plate 1. The shape of each connecting plate 1 may be changed, as long as it remains within the scope of protection of the present invention, which is defined by the claims.
In the suspension mechanism for mounting the motor provided according to a specific embodiment of the present invention, an end, close to the safety pin 2, of the cantilever 3 is provided with a connecting hole horizontally penetrating end portions of the cantilever 3, a penetration direction of the connecting hole is perpendicular to an extension direction of the cantilever 3, the connecting hole is sleeved on the safety pin 2, and the connecting hole is in clearance fit with the safety pin 2. As shown in Figure 2, the cantilever 3 is sleeved on the safety pin 2 through the connecting hole. An outer ring of the cantilever 3 is connected to the motor 5, and an inner ring of the cantilever 5 is in clearance fit with the safety pin 2 through the connecting hole. Therefore, the extension direction of the cantilever 3 refers to a radial direction perpendicular to an axial direction (length direction) of the cantilever 3, that is, an up-down direction in Figure 2, and the penetration direction of the connecting hole refers to the axial direction (length direction) of the cantilever 3, that is, a left-right direction in Figure 2.
Therefore, when the suspension mechanism for mounting the motor allows the motor 5 to be suspended from the cantilever 3 (the motor is suspended from the outer ring of the cantilever 3), the suspension mechanism for mounting the motor allows the end provided with the connecting hole of the cantilever 3 (the inner ring of the cantilever 3 to be able to freely move along the safety pin 2 in a certain range. Other connection manners may also be adopted, for example, the cantilever 3 may be provided with a hook.
Based on the suspension mechanism for mounting the motor provided according to the above specific embodiments, the suspension mechanism for mounting the motor further includes two elastic position-limiting pieces 4 sleeved on two ends of the safety pin 2. End portions of the two elastic position-limiting pieces 4 are fixedly connected to inner side plate surfaces of the two connecting plates 1, respectively, that is, the opposite plate surfaces of the two connecting plates 1; the end portion of the cantilever 3 is located between the two elastic position-limiting pieces 4 and is spaced apart from the two elastic position-limiting pieces. The end portion of the cantilever 3 can freely move in a space between the two elastic position-limiting pieces 4, that is, the cantilever 3 can move between the two elastic position-limiting pieces 4, and will impact the elastic position-limiting pieces 4 when a moving distance is excessively large, which plays a role of buffering, thereby avoiding the damage of the equipment.
The elastic position-limiting piece 4 may have various forms, for example, the elastic position-limiting piece 4 may include a mounting seat fixedly connected to the inner side plate surface of the connecting plate 1 and a spring arranged in the mounting seat and sleeved on the safety pin 2, and a bottom surface of the mounting seat is provided with a through hole for the safety pin 2 to penetrate. An end away from the mounting seat of the spring may be further provided with an end cover, and the end cover is provided with a through hole for the safety pin 2 to penetrate. The mounting seat is connected to the connecting plate 1 by bolts, and the end cover may specifically be a rubber cover. The elastic position-limiting piece 4 of other forms may also be adopted, such as a leaf-spring or a buffering rubber column or the like, or the connection manner is changed for welding connection or clamping connection or the like, which are all with the scope of protection of the present 2. invention.
In order to ensure the stable connection of the safety pin 2, a position-limiting cap may be provided at one end of the safety pin 2, and a diameter of the position-limiting cap is greater than a diameter of the positioning hole. During the installation, an end without the position-limiting cap of the safety pin 2 penetrates one connecting plate 1, one elastic position-limiting piece 4, the connecting hole of the cantilever 3, the other elastic position-limiting piece 4 and the other connecting plate 1 in a listed sequence, and the position-limiting cap abuts against the connecting plate 1 which is firstly penetrated, and the end without the position-limiting cap of the safety pin 2 is connected to a position-limiting member, so as to prevent the safety pin 2 from falling off.
In addition, a railway train having the above suspension mechanism for mounting the motor is further provided according to a specific embodiment of the present invention, and structures of other parts of the rail train can be referred to the conventional technology, which will not be described herein.

Claims

A suspension mechanism for mounting a motor of a railway train, comprising a connector adapted to be connected to a bogie frame, a safety pin (2) mounted on the connector and arranged horizontally, and a cantilever (3);
wherein one end of the cantilever (3) is 2. adapted to be connected to a motor (5), another end of the cantilever (3) is movably connected to the safety pin (2) and is movable in a length direction of the safety pin (2), and the safety pin (2) is provided with an elastic position-limiting piece (4) for limiting a moving range of the cantilever (3),

wherein the connector comprises two connecting plates (1) arranged in parallel, a front side edge of each of the two connecting plate (1) is adapted to be connected to the bogie frame, two opposite positioning holes are provided on the two connecting plates (1), respectively, and two ends of the safety pin (2) are mounted in the two positioning holes, respectively, and

characterized in that each connecting plate (1) is vertically arranged and P-shaped, a right angle portion at a side, facing the motor (5), of each connecting plate (1) is smoothly transitioned to form a cambered edge, and the safety pin (2) is arranged at a head portion, having a large width, of each connecting plate (1).
The suspension mechanism for mounting the motor according to claim 1, wherein an end, close to the safety pin (2), of the cantilever (3) is provided with a connecting hole horizontally penetrating an end portion of the cantilever (3), a penetration direction of the connecting hole is perpendicular to an extension direction of the cantilever (3), the connecting hole is sleeved on the safety pin (2), and in clearance fit with the safety pin (2).
The suspension mechanism for mounting the motor according to claim 2, wherein the cantilever (3) is sleeved on the safety pin (2); in a radial direction perpendicular to the length direction of the safety pin (2), the cantilever (3) comprises an inner ring and an outer ring, the inner ring is in clearance fit with the safety pin (2) through the connecting hole, and the outer ring is connected to the motor (5).
The suspension mechanism for mounting the motor according to any one of claims 1 to 3, comprising two elastic position-limiting pieces (4) sleeved on two ends of the safety pin (2), respectively, end portions of the two elastic position-limiting pieces (4) are fixedly connected to inner side plate surfaces of the two connecting plates (1), respectively, and the end portion of the cantilever (3) is located between the two elastic position-limiting pieces (4) and is spaced apart from the two elastic position-limiting pieces (4).
The suspension mechanism for mounting the motor according to claim 4, wherein each of the two elastic position-limiting pieces (4) comprises a mounting seat fixedly connected to the inner side plate surface of the connecting plate and a spring arranged in the mounting seat and sleeved on the safety pin (2), and a bottom surface of the mounting seat is provided with a through hole for the safety pin (2) to penetrate.
The suspension mechanism for mounting the motor according to claim 5, wherein an end away from the mounting seat of the spring is provided with an end cover, and the end cover is provided with a through hole for the safety pin (2) to penetrate.
The suspension mechanism for mounting the motor according to claim 6, wherein the mounting seat is connected to the connecting plate (1) by bolts.
The suspension mechanism for mounting the motor according to claim 7, wherein the end cover is a rubber cover.
A railway train, comprising a bogie frame and a suspension mechanism for mounting a motor connected to the bogie frame, wherein the suspension mechanism is the suspension mechanism for mounting the motor according to any one of claims 1 to 8.