RU2609518C1 - Sliding door of elevator - Google Patents

Abstract

FIELD: transportation.

SUBSTANCE: sliding door of an elevator comprises folds placed on guides in parallel to each other and joined with a motion mechanism. At least one part of the motion mechanism is made in the form of two worms with crossing mutually perpendicular axes and the first worm wheel (13), which is rigidly fixed on the axis of the first worm (12) or made as a whole with it. The worm (12) interacts with the second worm wheel (11), kinematically connected to the second fold, at the same time the first worm wheel (13) is coupled with the second worm (14), the axis of which is combined with the axis of rotation of the third worm wheel (3). The other part of the motion mechanism is formed by a worm gear, which includes the third worm wheel (3) and a coupled third worm (5), the first fold is kinematicaly joined with the third worm wheel (3).

EFFECT: simplified design and improved operating characteristics.

6 cl, 8 dwg

Description

The invention relates to designs of sliding elevator doors installed in buildings.

The prototype is a sliding elevator door, containing sashes, consisting of two horizontally movable sections along the guides, one of which, the leading one, is equipped with restrictive pushing elements that are installed with the possibility of movement and fixation, and the other section, which is driven, is equipped with a restrictive element and emphasis interacting with the corresponding restrictive pushing elements of the leading section, while the driven section is installed with the possibility of limited movement at closing and closing the sash by interacting with restrictive stops mounted with the possibility of horizontal movement and fixation [US Pat. RF 2139831, IPC В66В 13/06, 1999].

The disadvantages of the prototype are:

- a complex structure due to the presence of a large number of parts and assemblies, which degrades performance;

- limited functionality associated with the lack of a safety device that stops the door if it meets an obstacle.

The objective of the invention is to simplify the design and improve performance.

The problem is solved in that in the sliding door of the elevator containing the shutters placed on the rails parallel to each other and connected with the movement mechanism, at least one part of the movement mechanism is made in the form of two worms with intersecting mutually perpendicular axes and a worm wheel, which is rigidly fixed on the axis of one worm located in the supports fastened to the first leaf of the platform and interacting with a gear wheel kinematically connected with the second leaf, and mated with another worm, Referring which is aligned with the rotation axis of the platform, while the other part moving mechanism is designed as a worm gear, the worm wheel which is fixed on the platform, and its axis coincides with the rotation axis of the latter.

One worm is made globoid. The worm wheel is located in the middle plane of the worm interacting with the gear. The worm gear is self-braking. Part of the platform in the area of worms with crossed axes is made in the form of an oil bath. The kinematic connection is made in the form of a chain transmission. The worm wheel is made in one with the first worm. The worm is magnetized in the radial direction. The worm is made in the form of a cylindrical shaft having the possibility of axial movement with a coiled spring rigidly mounted on it, the end of the shaft protruding beyond the shaft end, can contact the worm axial movement limiter.

These distinctive features allow you to achieve the following advantages compared with the prototype.

The implementation of the part of the movement mechanism, at least in the form of two worms with crossed mutually perpendicular axes and a worm wheel, which is rigidly fixed to the axis of one worm placed in supports fastened to the first wing of the platform and interacting with a gear wheel kinematically connected with the second wing, and is associated with another worm, the axis of which is aligned with the axis of rotation of the platform, while the other part of the movement mechanism is made in the form of a worm gear, the worm wheel of which is fixed EHO on the platform, and its axis coincides with the rotation axis of the latter, can significantly reduce the moment of inertia of rotating parts and to reduce their weight and size characteristics, which simplifies the design and reduces power consumption, thereby improving the operating characteristics also. In addition, it becomes possible to reduce the time of opening (closing) of the door due to the simultaneous movement of the leaves, which improves operational characteristics.

Performing a worm globoid reduces weight and size characteristics, since a globoid worm, ceteris paribus, can take large loads.

Placing the worm wheel in the middle plane of the worm interacting with the gear wheel reduces the overall dimensions of the movement mechanism.

Performing a self-braking worm gear allows you to automatically lock the door leaf in the right position after turning off the drive motor, which simplifies the design and improves performance.

The execution of part of the platform in the area of the worms with intersecting axes in the form of an oil bath improves their working conditions, while the mechanism is closed from moisture and dirt. This improves reliability and performance.

The implementation of the kinematic connection in the form of a chain transmission allows you to concentrate almost the entire movement mechanism on a fixed base, which simplifies the design of the door leaves and reduces their overall dimensions.

The execution of the worm wheel in one with the first worm reduces the number of parts and dimensions of the mechanism, which simplifies the design.

Magnetizing the worm in the radial direction allows it to be used, if necessary, as a sensor for the angle of rotation (determining the position of the door sections), while placing, for example, a reed switch or a Hall sensor next to it. This simplifies the design, increases its reliability and improves performance.

The execution of the worm in the form of a cylindrical shaft having the possibility of axial movement with a coiled spring rigidly mounted on it, protruding beyond the shaft end, the end of which can contact the worm axial movement limiter, allows the door to stop the shutter when an obstacle occurs in the way of its movement. This simplifies the design of the worm gear and the entire mechanism as a whole.

The invention is illustrated by drawings.

In FIG. 1 shows a diagram of a sliding elevator door in a closed state. In FIG. 2 is a view of A. FIG. 3 shows a view of a door with one open sash. In FIG. 4 shows a section BB of the door leaf movement mechanism. In FIG. 5 shows a view B of a door leaf movement mechanism. In FIG. 6 shows an embodiment of a worm gear with a safety device. In FIG. 7 shows a door with one leaf outside the elevator car. In FIG. 8 shows a door with two wings outside the elevator car.

The sliding door of the elevator is placed on the cab 1 with a fixed base 2, on which a worm wheel (platform) 3 is mounted, with the possibility of rotation on a sleeve 4 fixedly mounted on the base, coupled with a worm 5 connected to the first engine (not shown) and rotating in base supports. A stand 6 is fixed on the wheel 3 with a groove 7 and a support 8 of the axis 9, on which the drive sprocket 10 and the worm wheel 11 are fixed, interacting with the teeth of the globoid worm 12, which is mounted in the groove 7 of the stand 6 with the possibility of axial rotation and is rigidly fixed to the axis of the worm wheel 13, coupled with the worm 14, the shaft 15 of which is rotatably mounted in the sleeve 4 and connected to a second engine (not shown), mounted on the base 2. A rod 16 is fastened to the wheel 3, on the end of which the axis 17 is fixed on which thrust with a possibility of rotation, the linkage 18 and the driven sprocket 19 are connected together and connected by a chain 20 (or a toothed belt) with a drive sprocket 10. At the ends of the rods 16, 18 are sliders made, for example, in the form of pins 21, 22 with grooves 23, 24, which are mounted to slide respectively along the guides 25, 26, fastened respectively to the middle and the edge of the door leafs 27, 28, mounted on parallel guides mounted on an elevator car having a doorway 29. The worm 5 can be made with the possibility ü longitudinal movement along the axis 30 (for example, along the slots), on which the springs 31 are freely placed, the ends of which are able to contact the end face of the worm and its rotation support 32. The worm gear can be made in the form of a wheel 33, interacting with teeth with a spring 34, pressed in the area of the wheel on the stepped shaft 35 and interacting with the ends with bearings 36.

Sliding elevator door operates as follows.

In the initial state, the shutters 27, 28 of the door are in an extended state, overlapping the doorway 29 of the elevator car, while the rods 16, 18 are located one after another in a straight line, and the sliders 21, 22 are located on the edge of the guides 25, 26 (Fig. 1 )

In the absence of bulky things, you can use the elevator by moving only one door leaf, which will reduce the time it takes to open and close the door, as well as the energy consumption. To move the sash 28, a second engine is turned on, which through the worm 14, the worm gear 13 and the associated globoid worm 12 will rotate the gear 11 with the axis 9, the drive sprocket 10 and the chain 20, and also rotate the driven sprocket on the axis 17 19 at the same time with a thrust 18 (Fig. 4, 5). In this case, the pin 22 will slide along the guide 26, dragging along the door leaf 28. After turning the rod 18 counterclockwise 180 ° and reaching a horizontal position, the second engine is turned off (Fig. 3). The sash 28 is automatically locked in this position due to a self-braking transmission, freeing half of the doorway 29 for passage. The angle of rotation of the thrust 18 can be controlled by counting the number of revolutions of the worm 14 or 12. Close the specified leaf by changing the direction of rotation of the second engine.

If the doorway needs to be completely released, then after the movement of the leaf 28 (or simultaneously with its movement), the first engine is turned on, the worm wheel 3 rotates on the bushing 4 by means of the worm 5, with which the thrust 16 begins to turn (Fig. 4, 5). When the wheel 3 rotates, the worm wheel 13 with its teeth will slide along the helical surface of the fixed worm 14 (run around it) and rotate. However, since the angle of rotation of the rod 16 is small, and the gear ratio from the worm 14 to the gear 11 is, on the contrary, large, the wheel 11 will practically remain in place, so the rod 18 will not move relative to the rod 16, the rod 18 will only rotate at the same time as traction 16. As a result, the pin 21 will slide along the guide 25, entraining the door leaf 27, and the pin 22 will turn in the guide 26, leaving the door 28 in place without movement. After turning the rod 16 counterclockwise 180 ° and reaching a horizontal position, turn off the first engine. The sash 27 is automatically locked in the position extended beyond the doorway 29 (cabin) (Fig. 7).

If in the process of closing the sash 27 there is an obstacle to its movement (for example, stopping it by a passenger), then the increasing moment of resistance on the worm wheel 3 leads to the movement of the worm 5 along its axis while compressing the spring 31. As a result of compression of this spring and the interaction of the end face of the worm with a switch (not shown), the engine switches to reverse or stops. A similar safety device for stopping the door can be installed on the axis of the worm 14 or 12, if the latter is not globoid. Note that the worm gear can be simplified, while increasing the moment of resistance on the wheel 33, the edges of the spring 34 are compressed, allowing the shaft 35 to move along its axis and switch the engine (Fig. 6). Note that the initial gap between the end of the spring and the support allows you to reduce the inertial and shock loads when starting the sash due to idle acceleration of the engine when choosing this gap and the subsequent smooth increase in the load on the engine. We also note that if one engine fails, the door can be opened halfway with the other, and when the power is turned off, by moving the worm 5 along the axis, for example, by a lever.

Then, the second engine is turned on again, as a result of which the thrust 18 begins to turn counterclockwise. The pin 22 slides along the guide 26, dragging the leaf 28 behind it. After turning this rod through 180 °, this leaf completely extends beyond the doorway 29, completely freeing the latter (Fig. 8). The second engine is turned off, and the sash is automatically locked in the extreme position. Note that the movement of the wings 27, 28 can be combined in time.

The implementation of the invention will create a compact, simple, reliable and easy to use sliding door for the elevator car.

Claims (6)

1. The sliding door of the elevator containing the shutters placed on the rails parallel to each other and connected with the movement mechanism, characterized in that at least one part of the movement mechanism is made in the form of two worms with intersecting mutually perpendicular axes and the first worm wheel, which rigidly fixed to the axis of the first worm or made for one with it, interacting with the second worm wheel kinematically connected with the second leaf, while the first worm wheel is paired with the second a worm whose axis is aligned with the axis of the third rotation of the worm wheel, the other part is formed by movement of worm gear mechanism, which includes the third worm wheel and its associated third worm, the first flap is kinematically connected to a third worm wheel. 2. The door according to claim 1, characterized in that the first worm is made globoid. 3. The door according to claim 1, characterized in that the worm gear is self-braking. 4. The door according to claim 1, characterized in that the kinematic connection is made in the form of a chain transmission. 5. The door according to claim 1, characterized in that the worm is magnetized in the radial direction. 6. The door according to claim 1, characterized in that the third worm is made in the form of an axial movement of a cylindrical shaft with a coiled spring rigidly planted on it, the end of the shaft protruding beyond the shaft end, can contact the worm axial movement limiter.

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