Patent ID: 12214994

DETAILED DESCRIPTION

It would be easy to understand that, according to the technical solution of the present invention, those of ordinary skills in the art may propose a plurality of interchangeable structural modes and implementation modes without changing the essence and spirit of the present invention. Therefore, the following specific implementation modes and accompanying drawings are merely an exemplary description of the technical solution of the present invention, and should not be deemed as all of the present invention or restrictions or limitations to the technical solution of the present invention.

Terms of directions and locations mentioned or potentially mentioned in this specification, such as up, down, left, right, front, back, front face, rear face, top, bottom, and the like, are defined with respect to the structures in the figures and are relative concepts. Therefore, the terms may change correspondingly when the structures are at different locations and in different use states. As a result, these or other terms of directions and locations shall not be construed as limiting terms.

FIG.1andFIG.2illustrate a cross section of a motor spindle2and a turning device1connected to a first end21of the motor spindle2. The motor spindle2is supported by a motor spindle mechanism support5and may be arranged in a machine room at the top of the elevator shaft. The motor spindle2comprises a portion20coupled to a motor3, as well as the first end21and a second end22on two sides thereof. The motor3drives the motor spindle2to rotate and drive the cables to pull the elevator car to go up or go down. The second end22of the motor spindle2is associated with a braking device4to be described in detail below. In case of an emergency, the braking device4will stop the motor spindle2, such that the motor spindle2is unable to rotate. At this moment, however, the elevator car may stop between two floors, making it impossible for passengers to be evacuated from the car. In this case, the brake disc release device6and the turning device1according to the embodiments of the present invention may be used to conveniently dock the car at a safe floor and evacuate passengers in the car.

The turning device1acts on the first end21of the motor spindle2and is intended to control, before the braking device is released, the motor spindle2, such that the motor spindle2will not get out of control after the braking device is released. The turning device1comprises, for example, a hand disc19, and the hand disc19is coupled to an input shaft11. The hand disc19is disc shaped and held by an operator. The hand disc19may have a big size, for example, a diameter greater than 300 mm, such that the operator can control the motor spindle2by using a small holding force. The turning device1further comprises a reduction gear set, which is accommodated in a housing and connected to the input shaft11and an output shaft14. In some embodiments, the reduction gear set comprises a first gear12coupled to the input shaft11and a second gear13coupled to the output shaft14. In some embodiments, the gear ratio of the second gear13to the first gear12may be, for example, greater than 4:1. It should be understood that the reduction gear set may comprise more gears. The housing is formed, for example, jointly by a front cover15and a rear cover16, which are connected via circumferential bolts17and the space therebetween is used for accommodating the reduction gear set. The turning device1further comprises a shaft connector10, and the shaft connector10is used for connecting the output shaft14and the motor spindle2. After the turning device1grasped by the operator is connected to the motor spindle2, the braking device4can be released, and at this moment, the motor spindle2will not rotate without control. The operator slowly rotates the hand disc19to control the elevator car to move smoothly to a safe floor.

In some embodiments, to prevent the turning device1from shaking, the housing of the turning device1is connected to the motor spindle mechanism support5via a plurality of bolts18(e.g., two bolts18), specifically the housing portion of the motor3, thereby providing additional connection points. In this way, there are three connection points between the turning device1and the motor spindle mechanism, including the connection point between the output shaft14and the motor spindle2and the above additional connection points, which ensures the stability of the turning device1. In some embodiments, the shaft connector10is connected between the output shaft14and the first end21of the motor spindle2. For example, the end surface of the first end21of the motor spindle2may be formed with a bolt hole, a first end101of the shaft connector10is connected to the first end21of the motor spindle2via a bolt103, and the shape of a second end102of the shaft connector10matches a notch142on a corresponding end141of the output shaft14so as to transfer torque. In some embodiments, the second end102of the shaft connector10may have a cross-sectional shape of rectangle, regular pentagon, or regular hexagon, while the notch142on the corresponding end141of the output shaft14may have a matching shape. In an alternate embodiment, the second end102of the shaft connector10and the notch142on the corresponding end141of the output shaft14may have any other proper matching shape.

FIG.3andFIG.4illustrate the structure of the second end22of the motor spindle2and the brake disc release device according to the present invention. The second end22of the motor spindle2is supported by the motor spindle mechanism housing5and a bearing. A friction disc45is fixedly connected to the second end22of the motor spindle2. The braking device4comprises a brake disc46, wherein one side of the brake disc46faces the friction disc45, and the other side thereof faces an electromagnet41. In addition, a set of spring devices42is further provided between the brake disc46and the electromagnet41, and the spring devices42tend to push the brake disc46toward the friction disc45. The electromagnet41and the brake disc46are provided with holes so as to be fixed onto the motor spindle mechanism housing5via bolts43. When the electromagnet41is powered on, the brake disc is attracted to compress the spring devices42, thereby being separated from the friction disc45and not obstructing the rotation of the motor spindle2. In an emergency, e.g., the elevator exceeds a rated speed, a speed governor will trigger an electric switch, such that the electromagnet41is powered off, and the brake disc46is no longer subject to the attracting force of the electromagnet41, but engages with the friction disc45under the action by the spring devices42, thereby stopping the motor spindle2and stopping the car. If the elevator car is located between two floors at this moment, it is necessary to release the brake disc46, so that the motor spindle2rotates until the elevator car docks at a safe floor. Since the force applied by the spring devices42to the brake disc46is high, a special tool is needed to pull away the brake disc46, such as the brake disc release device6according to the present invention.

The brake disc release device6may comprise an actuating mechanism61; a gear62connected to a first end612of the actuating mechanism61; a first slider63, wherein the first slider63comprises a rack portion631for engagement with the gear62and a first wedge portion632; a second slider64, wherein the second slider64comprises a second wedge portion641for engagement with the first wedge portion632of the first slider; and pulling cables651,652, wherein one ends6511,6521of the pulling cables651,652are connected to the second slider64, and second ends6512,6522of the pulling cables651,652are connected to the brake disc46; wherein the actuating mechanism61is rotated to drive the gear62to rotate, drive the first slider63to move in a first direction by means of the engagement between the gear62and the rack portion631of the first slider63, drive the second slider64to move in a second direction by means of the engagement between the first wedge portion632of the first slider and the second wedge portion641of the second slider64, and thus drive the pulling cables651,652to pull away the brake disc46. In some embodiments, the first direction in which the first slider moves may be perpendicular to the second direction in which the second slider moves. The first slider63is arranged below the gear62, and the second slider64is arranged above the gear62, as shown in the figures; but the first slider63and the second slider64may also be arranged in any other proper manner. For example, the first slider63may be arranged above, at the left side, or at the right side of the gear62, and the position of the second slider64may adjusted accordingly. It should be understood that although the rack portion631and the slope of the first wedge portion632of the first slider63are arranged in parallel at the same side, specifically above the first slider63, as shown in the figures, the rack portion631and the slope of the first wedge portion632of the first slider63may also be arranged at different sides of the first slider63in an alternate embodiment.

In some embodiments, the brake disc release device further comprises a housing, wherein the gear62, the first slider63, and the second slider64may be arranged inside the housing, and the actuating mechanism and the pulling cable are partially arranged at the inner side of the housing. As shown inFIG.4, the housing may consist of a lower housing662and an upper housing661. The lower housing662and the upper housing661may be, for example, connected via circumferential bolts. In some embodiments, the lower housing662may be further, for example, connected to a pedal68via legs671,672, and the operator may fix the brake disc release device6by stepping on the pedal. The brake disc release device6may also be fixed to the ground in other manners. In some embodiments, the actuating mechanism comprises a pair of actuating levers61on two sides of the housing, first ends612of the pair of actuating levers61are connected to a shaft613, the shaft613is connected to the gear62, and second ends611of the pair of actuating levers61are connected with each other to form a handle. The actuating mechanism may also comprise one actuating lever, and a handle may be provided on the second end of the actuating lever.

In some embodiments, the first guide piece is a first guide post633laterally arranged in the housing, and the first guide post633runs through the rack portion631and the first wedge portion632of the first slider63. In some embodiments, when the brake disc release device6is placed on the ground, the first guide post633is oriented horizontally. In some embodiments, the second guide piece is a plurality of second guide posts642vertically arranged in the housing, and the plurality of second guide posts642run through the second slider64at the circumference. In some embodiments, when the brake disc release device6is placed on the ground, the plurality of second guide posts642are oriented vertically.

In some embodiments, the brake disc release device6comprises a plurality of pulling cables, as shown inFIG.4, a total of four pulling cables. Second ends6512,6522of these four pulling cables651,652are evenly distributed and connected to circumferential positions of the brake disc, for example, positions at the same radius of the brake disc46and mutually spaced apart by 90 degrees, thereby evenly applying a tractive force to the brake disc46. In some embodiments, first ends6511,6521of the pulling cables651,652are connected to the second slider641via bolts, and the second ends6512,6522of the pulling cables are connected to the brake disc46via bolts. It can be seen fromFIG.3that the electromagnet41has through holes that allow these bolts to run through. In an alternate embodiment, the pulling cables may also be connected to the second slider64or the brake disc46in other proper manners. The pulling cables may be, for example, steel cords having a protective layer, which can withstand a high pulling force. With the brake disc release device according to the present invention, a force F0 acted by the operator on the actuating mechanism61may be magnified by more than 40 times. For example, the force acted on the actuating mechanism61may be 400 N, and this force is magnified, for example, 5 times, by the lever mechanism, such that the force F1 acted on the first slider631may be, for example, 2000 N, and this force is further magnified, for example, 10 times, by the wedge slider mechanism, such that the force F2 acted on the second slider may be, for example, 20000 N. Therefore, the operator can provide a force sufficient to pull away the brake disc46.

In addition, an elevator rescue package is further provided, comprising: the brake disc release device according to the embodiments; and the turning device according to the embodiments.

In addition, an elevator rescue method using this type of elevator rescue package is further provided, comprising: connecting the turning device to the motor spindle, and tightly grasping the hand disc; connecting the pulling cables of the brake disc release device to the brake disc; rotating the actuating mechanism of the brake disc release device to pull away the brake disc and thus release the motor spindle; and slowly rotating the hand disc of the turning device to enable the elevator car to dock at a safe floor.

The turning device and the brake disc release device may be operated by two operators. With the above elevator rescue package, the operators can calmly respond to the emergency that an elevator is stopped between two floors, promptly dock the elevator car to a safe floor, and evacuate passengers trapped in the elevator car.

The above-described specific embodiments are only for more clearly describing the principle of the present invention, wherein all parts are clearly illustrated or described, such that the principle of the present invention is easier to understand. Without departing from the scope of the present invention, those of ordinary skill in the art can easily make various changes or variations to the present invention, therefore, it should be understood that all these changes or variations shall be encompassed in the patent protection scope of the present invention.