RU2503553C1 - Sliding door drive - Google Patents

Abstract

FIELD: transport.

SUBSTANCE: invention relates machine building and can be used in railway cars, minivan taxis, elevators doors of various industrial premises. Proposed drive comprises mechanical energy accumulator spring with supports interacting in turns with thrusts at door and door opening. Mechanical energy accumulator comprises also spring brace while controlled retainer is secured at door opening to interact with said brace. Use of said spring allows ruling out of influence of loads required for driving the door from extreme position on geared motor.

EFFECT: higher reliability.

2 cl, 2 dwg

Description

The invention relates to mechanical engineering and can be used in the construction of vehicles, namely in the design of railroad cars, minibuses, as well as elevators and doors of various industrial premises.

A known mechanism for opening and closing the door of a railway car [1], including a pneumatic drive, characterized by the necessary speed. However, the need for a developed piping system, powerful compressors, receivers in each car, sensitivity to condensate and various contaminants has led to the fact that in most cases, when designing new and modernizing operated cars, preference is given to an electromechanical drive.

The closest in technical essence to the proposed technical solution is an electromechanical drive, which is mounted on a guide located above the doorway [1, 2]. The drive contains carriages driven by a gear motor with rollers moving along the guides, latches of the extreme positions of the doors.

When opening or closing the door at the moment of starting from the extreme positions, the engine must overcome the so-called static moment of resistance to the movement of the carriage. Because in the extreme positions the door is for the longest time, then in these positions under the influence of gravity and inertia forces on the rollers when the vehicle vibrates during movement on the rails, local depressions form, the rollers also acquire permanent deformations. The removal of the rollers from these positions requires efforts, often many times greater than the forces required to move the door in intermediate positions. In addition, additional forces are needed to release the door latches in extreme positions and overcome the acceleration inertia forces. Therefore, the starting torques on the engine significantly exceed the nominal values, which leads to a decrease in the reliability of the drive. It is also necessary to note the low speed of the electromechanical drive.

The invention is aimed at improving the reliability of the electromechanical drive of a sliding door by eliminating the need to overcome the loads of the drive motor when the door starts to move when the doors are moved from extreme positions.

The design of the drive car door is shown in figure 1.

The structure of the door 1 drive structure includes: a gear motor 2, which drives with the help of gear 3 carriages 4 rigidly connected to door 1 and moving along the guide 5 of the doorway. The stops 6, 7 are fixed on the doorway, and the stops 8 and 9, which interact with the supports 10, 11 of the spring 12 of the mechanical energy accumulator, are fixed on the door 1. The mechanical energy accumulator also includes a spacer 13 of the spring 12 with supports 14, 15, as well as a controlled lock 16 of the spacer 13, which is electrically connected to the control unit 17 connected to the gear motor 2.

In the position when the door is open (the leftmost position in the diagram, Fig. 1), it is held stationary by means of a latch (this function can be performed by the brake of the motor-reducer). At this moment, the spring 12 is maximally stretched, the spring support 10 is in contact with the stop 8 of the door 1, and the support 11 is in contact with the stop 7, mounted on the doorway.

To close door 1, the latch releases the door, and the spring 12 through the support 10 and stop 8 begins to accelerate the door 1, which will continue until the contact of the support 11 with the stop 9. The motor gearbox 2 is activated by the command of the control unit 17 after releasing the door from the latch and removing its spring from a stationary state. Next, the door will move at a constant speed, and with it the spring 12 will move with the supports 10, 11 (figure 2).

After the contact of the support 10 with the stop 6, the spring 12 through the stop 9 and the support 11 will be stretched, and thereby the door will start braking. The motor gearbox 2 at the command of the control unit 17 is turned off. When the door 1 reaches the extreme right position (the door is closed), the door lock is activated.

If, when the door was moving from the control unit 17, a command was received to stop the movement and reverse movement, the gear motor 2 is turned off, the controlled lock 16 is turned on and the spacer 13 is locked. When the door moves from left to right (closing the door), the spring support 10 will be held by the support 14 of the strut 13, and the spring support 11 will be freed from the strut support 15, and through the stop 9 and support 11, the spring 12 will stretch and thereby brake the door. The kinetic energy of the door’s movement will turn into the potential energy of spring extension 12. After this process is completed, the door will stop and immediately begin to move in the opposite direction - from right to left. At the command of the control unit 17, the gear motor 2 will turn on, which will facilitate the movement of the door 1. When the support 11 reaches the support 15 of the strut 13, the latch 16 releases the strut 13, and together with the door 1, the spring 12 and its supports 10, 11 will move to the right left. When the support 11 of the spring 12 reaches the stop 7, stretching of the spring and braking of the door will begin. At the command of the control unit 17, the gear motor 2 will turn off. When door 1 reaches its leftmost position, it will stop and the latch will work, which will keep it stationary.

Likewise, the door will be interrupted in the direction from right to left.

Using the proposed device allows you to exclude from the operation of the motor gearbox starting modes of output of the structure from a stationary state, because voltage is applied to the motor when the mechanical system is in motion. Because in the proposed design, when braking, the kinetic energy of the door is recovered into the potential energy of the spring, which is then consumed to accelerate the door, and thus the energy costs for accelerating the door are excluded, then its use will reduce energy consumption.

In addition, the use of the proposed device can improve the safety of using an automatic door, because at the end of a door’s movement, its kinetic energy of movement is absorbed (accumulated) by the spring of a mechanical energy accumulator, which also reduces the likelihood of shock processes when opening and closing doors. In emergency situations, for example, in the event of a blackout of the system, if necessary, the spring will facilitate the opening of doors.

It should also be noted that the use of the proposed device by selecting the appropriate stiffness of the battery spring allows you to increase performance to the required level.

Information sources

1. The choice of doors of passenger cars // Railways of the world, 2011, No. 10. S.37-40.

2. Ivanov M.D. and other device and operation of the tram. M .: Higher school. 1985, p. 53, p. 69.

Claims (2)

1. Sliding door drive, including a gear motor, control unit, carriages, guides, end position locks, characterized in that two stops are fixed on the doorway, the drive also includes a mechanical energy accumulator, consisting of two stops mounted on the door, springs with supports alternating with the stops of the door and the doorway. 2. The drive according to claim 1, characterized in that the mechanical energy accumulator contains a spring strut, a controlled lock is mounted on the doorway with the possibility of interaction with the spring strut.

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