Qingdao Sifang Rolling Stock Research Institute Co.

Qingdao, China

Qingdao Sifang Rolling Stock Research Institute Co.

Qingdao, China
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Patent
Qingdao Sifang Rolling Stock Research Institute Co. and Qingdao Sri Technology Co. | Date: 2015-04-22

Disclosed is a front installed suspension system having overload protection. The system comprises a mounting seat (1), a centring apparatus (2), a support apparatus (3) used for supporting a coupling buffer and a coupling end pin (4), wherein the mounting seat (1) is connected to a railway vehicle body, and the centring apparatus (2) and the support apparatus (3) are both installed on the mounting seat (1). The system further has a coupling connection seat (5) and an overload protection element (6), wherein the coupling connection seat (5) comprises a base and a coupling connection part connected as one with the base. The base is connected to a rear face of the mounting seat (1) by means of the overload protection element (6). The coupling connection part passes through a through hole (7) provided in the middle of the mounting seat (1) and is connected with the coupling buffer by means of the coupling end pin (4). The coupling connection part is closely fitted with the through hole (7). The front installed suspension system has a simple structure and is lightweight.


Patent
Qingdao Sifang Rolling Stock Research Institute Co. | Date: 2014-08-27

The patent was disclosed a telescopic mechanism in a telescopic hitch buffer device for use in high speed electric multiple unit (EMU) trains. The telescopic mechanism comprises a compression rod (2) located inside a movable housing (1) of said hitch buffer device, one end of said compression rod (2) being connected to the movable housing (1), and a bearing connector (3) encasing the compression rod (2). A guiding barrel (4) is fixedly mounted outside the bearing connector (3). An extension/retraction driving mechanism (9) is provided between the guiding barrel (4) and the movable housing (1). A locking mechanism comprises protrusions (6) distributed at the other end of the compression rod (2), and grooves (7) in engagement with protrusions (6) on the inner wall of the bearing connector (3). One end of the compression rod (2) is connected to the movable housing (1) via a torsion spring (5), keeping the compression rod (2) and the bearing connector (3) in a locked state; an unlocking driving mechanism is provided on the outside of the movable housing (1), and is in an unlocked state when the protrusions (6) face the grooves (7), in which case, the movable housing (1) and the bearing connector (3) can slide relative to each other. Since the extension/retraction driving mechanism (9) is provided inside the movable housing (1), volume is reduced, good protection is provided for respective components, and the telescopic mechanism and the locking mechanism are relatively simple in structure, labor-saving, reliable in operation, and can bear relatively large loads.


Patent
Qingdao Sifang Rolling Stock Research Institute Co. | Date: 2015-04-22

Disclosed is a segmented inverting cover plate apparatus for an underfloor vehicle lifting jack. The apparatus comprises a cover plate, the cover plate being of a segmented structure, comprising a first movable cover plate (4) and a second movable cover plate (6), wherein the first movable cover plate (4) and the second movable cover plate (6) are hinged by means of a pin shaft. An anti-inversion block (5) is provided directly below the pin shaft, the anti-inversion block (5) being connected to the first movable cover plate (4) by means of the pin shaft. A guide wheel (7) is provided below the end of the second movable cover plate (6) away from the first movable cover plate (4). An inverting arm (3) is provided below the first movable cover plate (4), one end of the inverting arm (3) is connected to the anti-inversion block (5) by means of a bearing, the other end is connected to a powered push rod (1) by means of the pin shaft and an oil-containing bearing, and the powered push rod (1) is installed on a powered push rod mounting seat (2). The advantages of the present invention are: 1. in the course of overhauling, the lifting of a jacking element does not need to open the inverting cover plate; 2. after being closed, the first movable cover plate will not occupy the limited overhauling space, reducing safety risks for personnel performing the overhaul; and 3. various models of vehicle lifting element can be used.


Patent
Qingdao Sifang Rolling Stock Research Institute Co. | Date: 2016-01-08

A balancing apparatus for a transition coupler is arranged on the upper end face of the transition coupler (1). The balancing apparatus comprises a rotating shaft (2) arranged on the transition coupler (1), a rotating rod (4) and a top seat (7). The rotating rod (4) comprises an upper end plate (11) and a lower end plate (12), a ramp protrusion (13) is arranged between the upper end plate (11) and the lower end plate (12), the ramp protrusion (13) is located on the side face of the lower end plate (12), the ramp protrusion (13) is of a sheet protruding structure; when the upper end plate and the lower end plate of the rotating rod serve as the reference, in the longitudinal direction, the ramp protrusion (13) is of the structure that the ramp protrusion (13) outward inclines towards the rotating rod, one end of the rotating rod (4) is arranged on the rotating shaft, a pin shaft (5) is arranged at the other end of the rotating rod (4), an eyelet bolt (6) is further arranged on the pin shaft (5), and the rotating rod (4) can rotate around the rotating shaft (2) and hinged to the eyelet bolt (6) through the pin shaft (5). A through hole is formed in the top seat (7), the eyelet bolt (6) penetrates through the through hole in the top seat, a nut (9) is fixedly arranged at the tail end of the eyelet bolt (6), a spring (10) is arranged between the nut (9) and the through hole of the top seat (7), and the diameter of the spring (10) is larger than the diameter of the through hole in the top seat (7). The balancing apparatus can effectively prevent the phenomenon of a bent head found in a transition coupler when coupling car-couplers, and the transition coupler can be horizontal after being installed.


Patent
Qingdao Sifang Rolling Stock Research Institute Co. | Date: 2016-02-05

Disclosed is a movable loading machine with a twin telescopic boom structure, comprising a head wagon (1) and a tail wagon (2), wherein the tail wagon (2) is connected to the head wagon (1) via a traction pull rod, a twin telescopic boom (4) and a dual-stage triple-channel forked hopper (3) are mounted on the head wagon (1), the twin telescopic boom (4) comprises a main wagon loading boom (41) and an auxiliary wagon loading boom (42), which are mounted in parallel, the main wagon loading boom (41) and the auxiliary wagon loading boom (42) both are booms with a telescopic function, the dual-stage triple-channel forked hopper (3) comprises an upper-stage forked hopper (31) and a lower-stage forked hopper (32), the upper-stage forked hopper (31) and the lower-stage forked hopper (32) both have three channels, namely a main wagon loading channel (33), an auxiliary wagon loading channel (34) and a recovery channel (35), and the main wagon loading channel (33) is connected to the main wagon loading boom (41) and the auxiliary wagon loading channel (34) is connected to the auxiliary wagon loading boom (42). The present invention can continuously meter and load bulk freight into a box of an open wagon and can meet the conditions of use of electrified railway depots, making it suitable for electrified railways with overhead contact systems.


Patent
Qingdao Sifang Rolling Stock Research Institute Co. | Date: 2015-01-21

The patent was disclosed a telescopic mechanism in a telescopic hitch buffer device for use in high speed electric multiple unit (EMU) trains. The telescopic mechanism comprises a compression rod (2) located inside a movable housing (1) of said hitch buffer device, one end of said compression rod (2) being connected to the movable housing (1), and a bearing connector (3) encasing the compression rod (2). A guiding barrel (4) is fixedly mounted outside the bearing connector (3). An extension/retraction driving mechanism (9) is provided between the guiding barrel (4) and the movable housing (1). A locking mechanism comprises protrusions (6) distributed at the other end of the compression rod (2), and grooves (7) in engagement with protrusions (6) on the inner wall of the bearing connector (3). One end of the compression rod (2) is connected to the movable housing (1) via a torsion spring (5), keeping the compression rod (2) and the bearing connector (3) in a locked state; an unlocking driving mechanism is provided on the outside of the movable housing (1), and is in an unlocked state when the protrusions (6) face the grooves (7), in which case, the movable housing (1) and the bearing connector (3) can slide relative to each other. Since the extension/retraction driving mechanism (9) is provided inside the movable housing (1), volume is reduced, good protection is provided for respective components, and the telescopic mechanism and the locking mechanism are relatively simple in structure, labor-saving, reliable in operation, and can bear relatively large loads.


Patent
Qingdao Sifang Rolling Stock Research Institute Co. | Date: 2016-02-24

The present invention relates to a opening/closing mechanism equipped with a self-lock device; the opening/closing mechanism includes a baseplate(1), a fairing(2), a fairing support arm(3), and a powered push cylinder(4); wherein the baseplate(1) is provided with a rotating shaft(5), one end of the fairing support arm(3) is sleeved on the rotating shaft(5), while the other end is connected with the fairing(2) by means of a fairing mounting base(6); the fairing(2) is provided with an closed-state limit stop(7), an open-state limit stop(8) is arranged between the fairing support arm(3) and the fairing mounting base(6); a locking device(9) is arranged between the fairing support arm(3) and the powered push cylinder(4), one end of the said locking device(9) can move in the sliding groove of the fairing support arm(3), while the other end is installed on the powered push cylinder(4). The invention is simple and reliable in structure, low in cost, high in stability, and convenient for examination and repair. A power source is used for realization of opening and closing of the opening/closing mechanism, mechanical self-lock is achieved by means of over dead point for locking the opening/closing mechanism so as to hold at established state without additional power sources.


Patent
Qingdao Sifang Rolling Stock Research Institute Co. | Date: 2016-01-08

The present invention relates to an opening/closing mechanism equipped with a self-lock device; the opening/closing mechanism includes a baseplate(1), a fairing(2), a fairing support arm(3), and a powered push cylinder(4); wherein the baseplate(1) is provided with a rotating shaft(5), one end of the fairing support arm(3) is sleeved on the rotating shaft(5), while the other end is connected with the fairing(2) by means of a fairing mounting base(6); the baseplate(1) is provided with a closed-state limit stop(7) and an open-state limit stop(8); a locking device(9) is arranged between the fairing support arm(3) and the powered push cylinder(4), one end of the said locking device(9) can move in the sliding groove of the fairing support arm(3), while the other end is installed on the powered push cylinder(4). The invention is simple and reliable in structure, low in cost, high in stability, and convenient for examination and repair. A power source is used for realization of opening and closing of the opening/closing mechanism, mechanical self-lock is achieved by means of over dead point for locking the opening/closing mechanism so as to hold at established state without additional power sources.


Patent
Qingdao Sifang Rolling Stock Research Institute Co. | Date: 2015-08-28

Disclosed is a segmented inverting cover plate apparatus for an underfloor vehicle lifting jack. The apparatus comprises a cover plate, the cover plate being of a segmented structure, comprising a first movable cover plate (4) and a second movable cover plate (6), wherein the first movable cover plate (4) and the second movable cover plate (6) are hinged by means of a pin shaft. An anti-inversion block (5) is provided directly below the pin shaft, the anti-inversion block (5) being connected to the first movable cover plate (4) by means of the pin shaft. A guide wheel (7) is provided below the end of the second movable cover plate (6) away from the first movable cover plate (4). An inverting arm (3) is provided below the first movable cover plate (4), one end of the inverting arm (3) is connected to the anti-inversion block (5) by means of a bearing, the other end is connected to a powered push rod (1) by means of the pin shaft and an oil-containing bearing, and the powered push rod (1) is installed on a powered push rod mounting seat (2). The advantages of the present invention are: 1. in the course of overhauling, the lifting of a jacking element does not need to open the inverting cover plate; 2. after being closed, the first movable cover plate will not occupy the limited overhauling space, reducing safety risks for personnel performing the overhaul; and 3. various models of vehicle lifting element can be used.


A system and a method for parallel power supply control for auxiliary converters of a motor train unit in the presence of interconnecting lines. The system comprises multiple three-phase inverter modules. The multiple three-phase inverter modules are in parallel connection with each other. Any two-phase circuit of a three-phase inverter module is separately in parallel connection with a corresponding two-phase circuit of a three-phase inverter module adjacent to the three-phase inverter module by using a connecting line module. The connecting line module is connected to a control system. The three-phase inverter modules are also connected to the control system. The three-phase lines of the three-phase inverter modules are all provided with switches. Less interconnecting lines are used, and any two phases of the three-phase inverter modules are separately in parallel connection, and therefore, stable power supply is achieved by balancing currents of any two phases of the three-phase circuits, and the system reliability is improved.

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