KR20210050357A - Elevator - Google Patents

Abstract

The present invention relates to an elevator which is easy to ascend and descend while maintaining a horizontal center and has no risk of falling even in a state in which power transmission is cut off. The present invention discloses the elevator, wherein a drive motor is installed in a center of a lower part of a car, and a rotating shaft which is equipped with a worm installed at one end and is symmetrical, and a pinion gear works in conjunction with the worm and racks are installed at the four corners of a hoistway, and thus the elevator ascends and descends in a rack-and-pinion method. According to the present invention, a motor is installed in a center of the lower part of the car and power is transmitted in the rack-and-pinion method, there is no inclination to either side, so gear wear can be reduced, and it is possible to provide a safe elevator by automatically braking even when power transmission is blocked by applying the worm gear.

Description

Elevator {ELEVATOR}

The present invention relates to an elevator, and to an elevator that maintains a horizontal center and facilitates elevating and descending, and without a risk of falling even in a state in which power transmission is interrupted.

When the currently used elevator is divided according to the operating structure, the rope-type elevator (Helical geared type), the hydraulic elevator (Hydraulic Elevator) method, and the machine roomless elevator (Machine Roomless Elevator) method are mainly used. The rope-type elevator is a method of connecting a car and a counterweight with a rope and moving up and down using a pulley, and a hydraulic elevator is a method of moving up and down using a hydraulic cylinder. The rope-type elevator has a machine room in the upper part, and the hydraulic elevator has a machine room in the lower part. A hoisting machine, an electric motor, a control panel and a governor are installed in the machine room. In contrast, an elevator without a machine room is a method of elevating and descending with a belt without having a separate machine room, and a typical example is a flat belt type.

The above three methods require a separate braking device to prevent sudden cutoff or fall of the power transmitted to the elevator. For example, a braking device of a rope-type elevator will be described.

In the case of a rope-type elevator, the magnetic brake of the hoisting machine stopped the elevator car during operation, but there was no device to stop the elevator if the brake liner of the magnetic brake was worn and slipped. The elevator was stopped by the action of the inner wedge and the shock absorber. In this way, in the case of slipping and falling downwards in the rope-type elevator, there is a risk that passengers may be damaged. In order to solve such a brake problem, various types of braking devices have been proposed in a rope-type elevator, but a rope-type elevator having a brake that guarantees perfect safety cannot be constructed in reality.

1. Republic of Korea Patent Publication No. 10-2011-0123767 (published on November 15, 2011)

An object of the present invention is to solve the above problems, and it is an object of the present invention to provide a safe elevator that can reduce gear wear and does not require a separate brake device by enabling power transmission at the center of gravity while applying the rack pinion method.

The above object of the present invention is an elevator provided with a car (car) that installs a first rack, a second rack, a third rack, and a fourth rack at four corners of a hoistway, and moves up and down along the racks. The drive motor installed in the center and the first bevel gear rotation shaft and the second bevel gear that are installed in the +Y direction and -Y direction of the lower surface of the car based on the drive motor, and rotate by rotation of the drive motor engaged at one end. It is installed in the -X direction with respect to the rotation shaft and the other end of the first bevel gear rotation shaft, and the first pinion rotation shaft rotates by combining the other end and one end of the first bevel gear rotation shaft, and the other end of the first bevel gear rotation shaft. It is installed in the +X direction based on, and is installed in the -X direction with respect to the second pinion rotation shaft and the other end of the second bevel gear rotation shaft, which rotates by combining the other end and one end of the first bevel gear rotation shaft. 2Installed in the +X direction with respect to the other end of the 2nd bevel gear rotation shaft and the third pinion rotation shaft that rotates by combining the other end and one end of the bevel gear rotation shaft, and the other end and one end of the second bevel gear rotation shaft are combined. A fourth pinion rotation shaft that rotates and is installed under the other end of the first pinion rotation shaft, and a first main pinion gear that meshes with the first rack and is installed under the other end of the second pinion rotation shaft, and meshes with the second rack. The second main pinion gear is installed under the other end of the third pinion rotation shaft and is installed under the other end of the third main pinion gear and the fourth pinion shaft, which are engaged with the third rack, and are engaged with the fourth rack. It can be achieved by an elevator, characterized in that it comprises a fourth main pinion gear.

The elevator according to the present invention installs a motor in the center of the lower part of the car and transmits power in a rack pinion method, so that inclination to one side does not occur, and gear wear can be reduced. Even if it is blocked, it is automatically braked to provide a safe elevator.

1 is a perspective view of an elevator according to an embodiment of the present invention as viewed from a lower direction.
2 is a bottom view of an elevator car according to an embodiment of the present invention.
FIG. 3 is a partial side view illustrating a process in which a driving force of a driving motor installed on a lower surface of a car is transmitted as showing part A shown in FIG. 2.
FIG. 4 is a partial perspective view for explaining part B shown in FIG. 2 in detail.
5 is a bottom view of an elevator car according to an embodiment of the present invention.

The terms used in the present invention are used only to describe specific embodiments, and are not intended to limit the present invention. Singular expressions include plural expressions unless the context clearly indicates otherwise. In the present specification, terms such as "comprise" or "have" are intended to designate the presence of features, numbers, steps, actions, components, parts, or combinations thereof described in the specification, but one or more other features. It is to be understood that the presence or addition of elements or numbers, steps, actions, components, parts, or combinations thereof does not preclude in advance.

In addition, in the present specification, the term "on or on the top" means to be positioned above or below the target portion, and does not necessarily mean to be positioned on the upper side with respect to the direction of gravity. In addition, when a part of a region, plate, etc. is said to be "on or on" another part, it is not only in contact with or spaced apart from the other part "directly on or on", as well as another part in the middle of it. Includes cases where there is.

In addition, in the present specification, when one component is referred to as "connected" or "connected" to another component, the one component may be directly connected or directly connected to the other component, but specially It should be understood that as long as there is no opposite substrate, it may be connected or may be connected via another component in the middle.

In addition, in the present specification, terms such as first and second may be used to describe various components, but the components should not be limited by the terms. The above terms are used only for the purpose of distinguishing one component from another component.

The present invention relates to an elevator without a machine room, and to a rack and pinion elevator. Although the rack and pinion elevators are still used in some industries at present, the rack and pinion elevators are not widely used even for high-rises due to the operation noise of the gears and the wear of the pinion gears.

Hereinafter, preferred embodiments, advantages, and features of the present invention will be described in detail with reference to the accompanying drawings.

1 is a perspective view of an elevator according to an embodiment of the present invention as viewed from a lower direction. As shown in Fig. 1, the elevator according to the present invention has a structure in which racks 20c and 20d are installed at four corners of the hoistway 200 and the cars 100 and car move along the racks 20c and 20d. . A driving motor 60 is installed in the center of the lower part of the car 100, and the main pinion gears 50a, 50b, 50c, 50d are rotated while a plurality of rotation shafts are rotated by the driving motor 60, and the main pinion gear 50a , 50b, 50c, 50d) and the racks (20c, 20d) have a structure that moves up and down while engaging.

2 is a bottom view of an elevator car according to an embodiment of the present invention, showing a structure installed on the lower surface. For convenience of explanation, the horizontal direction in the drawings is referred to as the X-axis direction, and in the drawings, the vertical direction is referred to as the Y-axis direction. In addition, when displaying a detailed location, when the lower surface of the car 100 is divided into four by horizontal and vertical lines with the center where the driving motor is installed as the center point, the left direction is indicated as -X direction based on the vertical line passing through the center point. And, the right direction is indicated as +X direction. Similarly, based on the horizontal line passing through the center point, the upper direction is indicated as +Y direction, and the lower direction is indicated as -Y direction. A drive motor (not shown) is installed in the lower center, and the first bevel gear rotation shaft 11a and the second bevel gear rotation shaft 11b rotate by the rotational force of the drive motor. A fifth bevel gear 31a and a seventh bevel gear 33a are respectively installed at both ends of the first bevel gear rotation shaft 11a. The plurality of rotation shafts 11a, 11b, 10a, 10b, 10c, 10d, 103, and 10f shown in FIG. 2 are fixed and rotated by a plurality of rotation shaft supports 15 that are firmly fixed to the lower surface.

The fifth bevel gear 31a rotates by the driving motor, and thus the first bevel gear rotation shaft 11a rotates, and the seventh bevel gear 33a connected thereto rotates. The first worm rotation shaft 10a and the second worm rotation shaft 10b rotate by the rotation of the seventh bevel gear 33a. A first bevel gear 30a is installed at one end of the first worm rotation shaft 10a, and a first worm gear 40a is provided at the other end. The first bevel gear 30a rotates by the seventh bevel gear 33a, whereby the first worm rotation shaft 10a rotates, and the first worm gear 40a connected thereto rotates. The first main pinion gear 50a installed under the first worm gear 40a (upper or substantially lower in the drawing) by the rotation of the first worm gear 40a rotates along the first rack 20a. 100) moves up and down between the hoists.

As shown in Fig. 2, the driving device of the elevator according to the present invention has an X-axis and Y-axis symmetrical structure.

First, the Y-axis symmetric structure will be described. Until now, the fifth bevel gear 31a is rotated by the drive motor, and thus the first bevel gear rotation shaft 11a is rotated, and the seventh bevel gear 33a connected thereto rotates, ultimately resulting in the first rack 20a. It has been described that the first main pinion gear 50a moves up and down while being engaged. When the seventh bevel gear 33a rotates in a similar manner, the second bevel gear 30b rotates, and thus the second worm rotation shaft 10b rotates, and the second worm gear 40b connected thereto rotates. . As the second main pinion gear 50b installed under the second worm gear 40b rotates by the rotation of the second worm gear 40b, the car 100 moves up and down between the hoistways along the second rack 20b. It becomes.

Similar to the method in which the first worm rotation shaft 10a and the second worm rotation shaft 10b are driven while having a Y-axis symmetrical structure, the third worm rotation shaft 10c and the fourth worm rotation shaft 10d also have a Y-axis symmetrical structure. It is driven while having.

Next, the X-axis symmetric structure will be described. The first bevel gear rotation shaft 11a and the second bevel gear rotation shaft 11b rotate by the rotational force of a driving motor (not shown) installed in the lower center. A sixth bevel gear 31b and an eighth bevel gear 33b are respectively installed at both ends of the second bevel gear rotation shaft 11b. The sixth bevel gear 31b rotates by the driving motor, and thus the second bevel gear rotation shaft 11b rotates, and the eighth bevel gear 33b connected thereto rotates. The third worm rotation shaft 10c and the fourth worm rotation shaft 10d rotate by the rotation of the eighth bevel gear 33b. A third bevel gear 30c is installed at one end of the third worm rotation shaft 10c, and a third worm gear 40c is provided at the other end. The third bevel gear 30c is rotated by the eighth bevel gear 33b, whereby the third worm rotation shaft 10c rotates, and the third worm gear 40c connected thereto rotates. As the third main pinion gear 50c installed under the third worm gear 40c rotates by the rotation of the third worm gear 40c, the car 100 moves up and down between the hoistways along the third rack 20c. .

In a similar manner, when the eighth bevel gear 33b rotates, the fourth bevel gear 30d rotates, thereby causing the fourth worm rotation shaft 10d to rotate, and the fourth worm gear 40d connected thereto to rotate. do. As the fourth main pinion gear 50d installed in the upper portion of the fourth worm gear 40d rotates by the rotation of the fourth worm gear 40d, the car 100 moves up and down along the fourth rack 20d. It becomes.

The first main pinion gear 50a and the third main pinion gear 50c are fixedly installed on the first pinion gear rotation shaft 10e to rotate together. Similarly, the second main pinion gear 50b and the fourth main pinion gear 50d are fixedly installed on the second pinion gear rotation shaft 10f to rotate together.

FIG. 3 is a partial side view illustrating a process in which a driving force of a driving motor installed on a lower surface of a car is transmitted, illustrating part A illustrated in FIG. 2. A driving motor 60 is fixedly installed at the center of the lower surface of the car 100. The drive motor 60 includes a motor drive shaft 61, and a drive shaft bevel gear 35 is installed on the motor drive shaft 61. A fifth bevel gear 31a and a sixth bevel gear 31b are installed on the lower left and right sides of the drive shaft bevel gear 35, respectively, engaged therewith and rotated. As shown in FIG. 3, the drive shaft bevel gear 35 is rotated by the rotation of the motor drive shaft 61, and the fifth bevel gear 31a and the sixth bevel gear 31b are rotated.

FIG. 4 is a partial perspective view for explaining in detail part B shown in FIG. 2. It can be seen that a second worm gear 40b is installed at the other end of the second worm rotation shaft 10b, and a second main pinion gear 50b that rotates while meshing with the second worm gear 40b is installed under the second worm gear 40b. The second main pinion gear 50b is engaged with the second rack 20b to move the car 100 up and down.

However, it is easy to install the second main pinion gear 50b under the second worm gear 40b and match it with the second rack 20b as shown in FIG. 4 due to design tolerances and problems in installation space in practical implementation. not. In order to solve this problem, each pinion gear rotation shaft (10e, 10f) is formed to extend outward, and additional pinion gears (50a', 50b', 50c', 50d') are formed at the other end of each of the extended rotation shafts (10e, 10f). ) Can be installed.

5 is a bottom view of an elevator car according to an embodiment of the present invention, showing a structure installed on the lower surface. The display of the coordinates will be described in the same manner as in FIG. 2. Except for the configurations of the pinion gear rotation shafts 10e and 10f and the additional pinion gears 50a', 50b', 50c', and 50d', the remaining configurations are the same as those of FIG. 2, so a description thereof will be omitted. Compared with the structure shown in FIG. 2, in the elevator shown in FIG. 5, the first pinion gear rotation shaft 10e and the second pinion gear rotation shaft 10f are formed to extend outward, respectively. At one end of the extended first pinion gear rotation shaft 10e, a first portion having a diameter slightly larger than the first main pinion gear 50a is provided with a pinion gear 50a', and the first portion is a pinion gear 50a'. It can be seen that the first rack 20a is moved upward at the installation position shown in FIG. 2 to operate in engagement with the first rack 20a. A third part having a diameter slightly larger than the third main pinion gear 50c is installed at the other end of the similarly extended first pinion gear rotation shaft 10e, and the third part is pinion gear 50c. It can be seen that') was installed by moving the third rack 20c downward at the installation position shown in FIG. 2 so as to operate in engagement with the third rack 20c.

A second part having a diameter slightly larger than the second main pinion gear 50b is installed at one end of the similarly extended second pinion gear rotation shaft 10f, and the second part is pinion gear 50b. It can be seen that') was installed by moving the second rack 20b upward at the installation position shown in FIG. 2 so as to operate in engagement with the second rack 20b. A fourth portion having a diameter slightly larger than the fourth main pinion gear 50d is installed at the other end of the extended second pinion gear rotation shaft 10f, and the fourth portion is a pinion gear 50d'. It can be seen that the fourth rack 20d was moved downward at the installation position shown in FIG. 2 to operate in engagement with the fourth rack 20d.

The braking force of the elevator according to the present invention will be described. The elevator according to the present invention is operated in a rack pinion gear method by a driving force of a driving motor, and the pinion gear has a structure driven by rotation of a worm gear. Due to the structure of the worm gear and pinion gear, when the drive motor rotates, the pinion gear can be easily driven by rotating the worm gear. Since the pinion gear cannot rotate the worm gear, it is firmly fixed at the current position. Therefore, there is an advantage that safe operation is possible without having a separate braking device.

In addition, the elevator according to the present invention has a driving motor in the center of the lower surface, and transmits power to the racks installed at the four corners of the hoistway in a symmetrical structure of the X-axis and Y-axis. Can be minimized. Due to this structure, weight distribution is evenly distributed to the rack and pinion gear pairs installed at each of the four corners, so that frictional force can be reduced, resulting in a smoother operation, and gear wear can be minimized.

Although preferred embodiments of the present invention have been described above using specific terms, such terms are only for clarifying the present invention, and the embodiments and described terms of the present invention depart from the spirit and scope of the following claims. It is obvious that various changes and changes can be made without being able to do so. Such modified embodiments should not be individually understood from the spirit and scope of the present invention, but should be said to fall within the scope of the claims of the present invention.

10a, 10b, 10c, 10d: worm rotation shaft
10a: first worm rotation shaft 10b: second worm rotation shaft
10c: third worm rotation shaft 10d: fourth worm rotation shaft
10e, 10f: pinion gear rotation shaft
10e: first pinion gear rotation shaft 10f: second pinion gear rotation shaft
11a, 11b: bevel gear rotation shaft
11a: first bevel gear rotation shaft 11b: second bevel gear rotation shaft
15: rotating shaft support
20a, 20b, 20c, 20d: rack
20a: first rack 20b: second rack
20c: third rack 20d: fourth rack
30a, 30b, 30c, 30d, 31a, 31b, 33a, 33b, 35: bevel gear
30a: first bevel gear 30b: second bevel gear
30c: third bevel gear 30d: fourth bevel gear
31a: 5th bevel gear 31b: 6th bevel gear
33a: 7th bevel gear 33b: 8th bevel gear
35: drive shaft bevel gear
40a, 40b, 40c, 40d: worm gear
40a: first worm gear 40b: second worm gear
40c: third worm gear 40d: fourth worm gear
50a, 50b, 50c, 50d: main pinion gear
50a: first main pinion gear 50b: second main pinion gear
50c: 3rd main pinion gear 50d: 4th main pinion gear
50a', 50b', 50c', 50d': additional pinion gear
50a': the first part pinion gear 50b': the second part pinion gear
50c': part 3 pinion gear 50d': part 4 pinion gear
60: drive motor 61: motor drive shaft
100: car 200: hoistway

Claims (6)

As an elevator having a car (car) that installs a first rack, a second rack, a third rack, and a fourth rack at four corners of the hoistway, and moves up and down along the racks,
A driving motor installed in the outer center of the lower surface of the car,
A first bevel gear rotation shaft and a second bevel gear rotation shaft that are respectively installed in the +Y direction and -Y direction of the lower surface of the car with respect to the driving motor, and rotate by rotation of the driving motor engaged at one end,
A first pinion rotation shaft that is installed in the -X direction with respect to the other end of the first bevel gear rotation shaft, and rotates by coupling the other end and one end of the first bevel gear rotation shaft,
A second pinion rotation shaft that is installed in the +X direction with respect to the other end of the first bevel gear rotation shaft, and rotates by combining the other end and one end of the first bevel gear rotation shaft,
A third pinion rotation shaft that is installed in the -X direction with respect to the other end of the second bevel gear rotation shaft, and rotates by combining the other end and one end of the second bevel gear rotation shaft,
A fourth pinion rotation shaft that is installed in the +X direction with respect to the other end of the second bevel gear rotation shaft, and rotates by combining the other end and one end of the second bevel gear rotation shaft,
A first main pinion gear installed below the other end of the first pinion rotation shaft and operating in engagement with the first rack,
A second main pinion gear installed below the other end of the second pinion rotation shaft and operating in engagement with the second rack,
A third main pinion gear installed below the other end of the third pinion rotation shaft and operating in engagement with the third rack; and
An elevator comprising a fourth main pinion gear installed below the other end of the fourth pinion shaft and engaged with the fourth rack.
The method of claim 1,
A first worm gear provided at the other end of the first pinion rotation shaft,
A second worm gear provided at the other end of the second pinion rotation shaft,
A third worm gear provided at the other end of the third pinion rotation shaft, and
A fourth worm gear provided at the other end of the fourth pinion rotation shaft is further provided, the first worm gear is coupled to the first main pinion gear, the second worm gear is coupled to the second main pinion gear, and the second worm gear is coupled to the second main pinion gear. The elevator, characterized in that the three worm gear is coupled to the third main pinion gear, and the fourth worm gear is coupled to the fourth main pinion gear to rotate.
The method of claim 2,
The drive motor includes a motor drive shaft, a drive shaft bevel gear is provided on the motor drive shaft, a fifth bevel gear is provided at one end of the first bevel gear rotation shaft, and a sixth bevel gear is provided at one end of the second bevel gear rotation shaft. An elevator comprising bevel gears, wherein the fifth and sixth bevel gears rotate by rotation of the drive shaft bevel gear.
The method of claim 3,
A seventh bevel gear provided at the other end of the first bevel gear rotation shaft,
A first bevel gear provided at one end of the first worm rotation shaft,
A second bevel gear provided at one end of the second worm rotation shaft,
An eighth bevel gear provided at the other end of the second bevel gear rotation shaft,
A third bevel gear provided at one end of the third worm rotation shaft,
A fourth bevel gear provided at one end of the fourth worm rotation shaft is provided, and the first bevel gear and the second bevel gear rotate together by meshing with the seventh bevel gear, and the eighth bevel gear is meshed with the An elevator, characterized in that the third bevel gear and the fourth bevel gear rotate together.
The method of claim 4,
A first pinion gear rotation shaft installed in the Y direction under the car and rotating the first main pinion gear and the third main pinion gear, and
An elevator, further comprising a first pinion gear rotation shaft installed in the Y direction under the car and rotating the second main pinion gear and the fourth main pinion gear.
The method of claim 5,
The first pinion gear rotation shaft extends outward in both directions, and a first portion pinion gear and a third portion pinion gear are provided at ends of portions extending outward in each direction,
The second pinion gear rotation shaft extends outward in both directions, and a second portion pinion gear and a fourth portion pinion gear are provided at ends of portions extending outward in each direction,
The first rack is installed so that the first portion engages with the pinion gear instead of meshing with the first main pinion gear,
The second rack is installed so that the second part is engaged with the pinion gear instead of the second main pinion gear,
The third rack is installed so that the third part meshes with the pinion gear instead of meshing with the third main pinion gear,
The fourth rack is an elevator, characterized in that instead of being engaged with the fourth main pinion gear, the fourth portion is installed to engage with the pinion gear.

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