OPENING/CLOSING MECHANISM EQUIPPED WITH A SELF-LOCK DEVICE

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.

FIELD OF THE INVENTION

The present invention relates to the field of railway vehicle mechanical manufacturing technology, in particular to a front-end opening/closing mechanism of a CRH train.

BACKGROUND OF THE INVENTION

In order to realize reconnection or return rescue, usually a front-end opening/closing mechanism is simultaneously installed at both ends of a CRH train. As an important part of a CRH train, the front-end opening/closing mechanism is at a closed state during normal running (i.e. at a non-reconnection state) of the CRH train, during this time, a front-end fairing cabin door is closed so as to prevent vanes, dust, ice and snow from entering and to protect the coupler and other facilities in the front-end fairing, ensuring a good aerodynamic profile of the CRH train. in case of return or rescue, the opening/closing mechanism can be either automatically opened or manually opened, thus opening the front-end fairing cabin door and revolving it into the front end, the full-automatic coupler is stretched out for normal coupling.

At present, a familiar front-end opening/closing mechanism usually consists of a pushing device and a locking device. In order to achieve opening and closing the opening/closing mechanism and realize a reliable locking, the opening/closing mechanism usually is provided with one or several independent locking devices. Consequently, the opening-closing process and the locking process of the opening/closing mechanism usually are achieved by different operations, which require two or more different air cylinders, resulting in comparatively complex mechanical structure and automatic control theory of the opening/closing mechanism, as well as correspondingly higher cost and lower reliability.

SUMMARY OF THE INVENTION

In allusion to above-mentioned disadvantages (more complex structure and higher cost, etc.) of the existing opening/closing mechanism at the front-end of a CRH train, the present invention provides an opening/closing mechanism equipped with a self-lock device, which is simple and reliable in structure, convenient for examination and repair, and low in cost.

The technical solution of the invention is as below: an opening/closing mechanism equipped with a self-lock device, comprising a baseplate, a fairing, a fairing support arm, and a powered push cylinder; wherein the baseplate is provided with a rotating shaft, one end of the fairing support arm is sleeved on the rotating shaft, while the other end is connected with the fairing by means of a fairing mounting base; the baseplate is provided with a closed-state limit stop and an open-state limit stop; a locking device is arranged between the fairing support arm and the powered push cylinder, one end of the said locking device can move in the sliding groove of the fairing support arm, while the other end is installed on the powered push cylinder; in the opening or closing process of the opening/closing mechanism, the locking device moves and forms a mechanism dead point with the fairing support arm; in the locking process, a part of the locking device goes across the mechanism dead point and is mechanically limited, and in the unlocking process, the locking device goes across the mechanism dead point from reversed direction.

Preferentially, the locking device comprises a cylinder body, in which a rolling wheel assembly and a spring are precompressed.

Preferentially, the one end of the cylinder body precompressed with a rolling wheel assembly is in rolling connection with the fairing support arm by means of the rolling wheel assembly, the rolling wheel assembly can roll in the fairing support arm, while the other end of the cylinder body is connected with the powered push cylinder.

Or instead, the one end of the cylinder body precompressed with a rolling wheel assembly is in rolling connection with the fairing support arm by means of the rolling wheel assembly, the rolling wheel assembly can roll in the fairing support arm, while the underneath of the wheel of the rolling wheel assembly is connected with the powered push cylinder.

Further, the lower end of the cylinder body is provided with a connector for manual unlocking and manual locking, both of which are operated through the connector.

Preferentially, only one rotating shaft is positioned, which is in the center of the baseplate.

Preferentially, two rotating shafts are positioned, which are on both sides of the baseplate.

The advantageous effects of the invention: the present 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 an established state; the present invention achieves opening and closing by one action, and simultaneously realizes the locking function of the opening/closing mechanism without additional power sources, changing the fact that additional locking devices and power sources are required for realization of the locking function of the previous opening/closing mechanism, and simplifying the structure of the opening/closing mechanism on the basis of realization of the locking function of the opening/closing mechanism. In addition, the lower end of the cylinder body of the locking device in the present invention is provided with a connector for manual unlocking and manual locking, both of which are operated through the connector simply; the manual unlocking and locking of the opening/closing mechanism can be achieved by revolving the locking device by an Allen wrench.

DETAILED DESCRIPTION OF THE EMBODIMENTS

Further description of the invention is made in combination with the accompanying drawings.

Embodiment 1: as shown inFIGS. 1-4, an opening/closing mechanism equipped with a self-lock device, comprising a baseplate1, a fairing2, a fairing support arm3, and a powered push cylinder4; wherein the baseplate1is provided with a rotating shaft5, one end of the fairing support arm3is sleeved on the rotating shaft5, while the other end is connected with the fairing2by means of a fairing mounting base6; the baseplate1is provided with a closed-state limit stop7and an open-state limit stop8; a locking device9is arranged between the fairing support arm3and the powered push cylinder4, one end of the said locking device9can move in the sliding groove of the fairing support arm3, while the other end is installed on the powered push cylinder4; in the opening or closing process of the opening/closing mechanism, the locking device9moves and forms a mechanism dead point with the fairing support arm3; in the locking process, a part of the locking device9goes across the mechanism dead point and is mechanically limited, and in the unlocking process, the locking device9goes across the mechanism dead point from reversed direction.

For realization of the rolling connection between the locking device9and the fairing support arm3and giving play to self-locking function, the locking device9comprises a cylinder body91, in which a rolling wheel assembly92and a spring93are precompressed; one end of the cylinder body91precompressed with the rolling wheel assembly92is in rolling connection with the fairing support arm3by means of the rolling wheel assembly92, the rolling wheel assembly92can roll in the fairing support arm3, while the other end of the cylinder body91is connected with the powered push cylinder4.

The working principle of the locking device9for realization of self-lock is as below: driven by the powered push cylinder4, the locking device9can rotate around the baseplate1, the rolling wheel assembly92at the other end of the locking device9can roll in the fairing support arm3, simultaneously driving the fairing support arm3to rotate around the rotating shaft5; when the fairing2rotates to the open or closed-state, which is driven by the fairing support arm3, the fairing support arm3, under the action of the open-state limit stop8or the closed-state limit stop7, is unable to continue rotating, at this moment, the locking device9continues rotating the rolling wheel assembly92to overcome spring force and thus being compressed. When the locking device9rotates to be perpendicular to (i.e. the critical point of mechanical “dead point”) the fairing support arm3, at this moment, the spring93of the locking device9is compressed the shortest, the locking device9continues rotating, the rolling wheel assembly92of the locking device9continues rolling in the fairing support arm3, and the spring93is released, at this moment, the angle between the locking device9and the fairing support arm3is less than 90 degrees, thus generating a mechanical self-lock angle, giving play to self-locking action, locking the opening/closing mechanism and holding it at the established state.

For convenience of manual unlocking, the lower end of the cylinder body91of the locking device is provided with a connector for manual unlocking and manual locking, both of which are operated through the connector; the manual unlocking and locking of the opening/closing mechanism can be achieved by revolving the locking device by an Allen wrench; both the manual unlocking and the manual locking are simple for operation.

The specific working process of the opening/closing mechanism in the present invention is as below: if the fairing2is going to be open, the powered push cylinder4pushes the locking device9to rotate, at this moment, the rolling wheel assembly92rolls in the fairing support arm3, simultaneously driving the fairing support arm3to rotate around the rotating shaft5; when the fairing2rotates to the open-state, which is driven by the fairing support arm3, the fairing support arm3, under the action of the open-state limit stop8, is unable to continue rotating, at this moment, the locking device9continues rotating the rolling wheel assembly92to overcome spring force and thus being compressed. When the locking device9rotates to be perpendicular to (i.e. the critical point of mechanical “dead point”) the fairing support arm3, at this moment, the spring93of the locking device9is compressed the shortest, the locking device9continues rotating, the rolling wheel assembly92of the locking device9continues rolling in the fairing support arm3, and the spring93is released, at this moment, the angle between the locking device9and the fairing support arm3is less than 90 degrees, thus generating a mechanical self-lock angle, giving play to self-locking action, locking the opening/closing mechanism and holding it at the open position.

If the fairing2is going to be closed, the powered push cylinder4pulls back the locking device9to rotate, at this moment, the rolling wheel assembly92rolls in the fairing support arm3, simultaneously driving the fairing support arm3to rotate around the rotating shaft5; when the fairing2rotates to the closed-state, which is driven by the fairing support arm3, the fairing support arm3, under the action of the closed-state limit stop7, is unable to continue rotating, at this moment, the locking device9continues rotating the rolling wheel assembly92to overcome spring force and thus being compressed. When the locking device9rotates to be perpendicular to (i.e. the critical point of mechanical “dead point”) the fairing support arm3, at this moment, the spring93of the locking device9is compressed the shortest, the locking device9continues rotating, the rolling wheel assembly92of the locking device9continues rolling in the fairing support arm3, and the spring93is released, at this moment, the angle between the locking device9and the fairing support arm3is less than 90 degrees, thus generating a mechanical self-lock angle, giving play to self-locking action, locking the opening/closing mechanism and holding it at the closed position.

Embodiment 2: different from Embodiment 1, in Embodiment 2, for realization of the rolling connection between the locking device9and the fairing support arm3and giving play to self-locking function, the locking device9comprises a cylinder body91, in which a rolling wheel assembly92and a spring93are precompressed; one end of the cylinder body precompressed with the rolling wheel assembly is in rolling connection with the fairing support arm by means of the rolling wheel assembly, the rolling wheel assembly can roll in the fairing support arm, while the underneath of the wheel of the rolling wheel assembly is connected with the powered push cylinder.

Embodiment 3: different from Embodiment 1, in Embodiment 3, there are two rotating shafts5arranged on both sides of the baseplate1; the two rotating shafts5are respectively sleeved at one end of the fairing support arm3on the same side, while the other end of the fairing support arm3is connected with the fairing2by means of the fairing mounting base6.

Embodiment 4: different from Embodiment 3, in Embodiment 4, for realization of the rolling connection between the locking device9and the fairing support arm3and giving play to self-locking function, the locking device9comprises a cylinder body91, in which a rolling wheel assembly92and a spring93are precompressed; one end of the cylinder body precompressed with the rolling wheel assembly is in rolling connection with the fairing support arm by means of the rolling wheel assembly, the rolling wheel assembly can roll in the fairing support arm, while the wheel underneath of the rolling wheel assembly is connected with the powered push cylinder.