Independently-mounted elevator constant-speed slow descending device

Abstract

The utility model discloses an independently-installed constant-speed slow descending device of an elevator. The independently-installed constant-speed slow descending device comprises a planetary gearbox, a clutch, a slow descending mechanism and a shell. The slow descending mechanism is in transmission connection with the planetary gearbox through a clutch and comprises a rotating shaft, a rotating wheel, an elastic component and a movable check block. The rotating shaft is in transmission connection with the clutch; convex parts and concave parts are alternately arranged on the surface of the rotating wheel; the elastic component is fixedly connected with the shell; the movable check block makes contact with the rotating wheel and the elastic component. When the elevator needs to be lowered, a motor band-type brake rod is loosened, equipment descends due to self weight, the rotating speed is increased through a planetary gearbox, torque is reduced and transmitted to an attracted clutch, the clutch transmits energy to a slow descending mechanism, a rotating wheel is driven to rotate, a movable check block rotates along with the rotating wheel, and a nitrogen spring is compressed; mechanical energy of the rotating wheel is converted into potential energy of the nitrogen spring; when the movable stop dog passes through the convex part of the rotating wheel, the nitrogen spring releases potential energy, so that the descending speed of the elevator is controlled.

Description

Technical Field

[0001] The utility model belongs to the technical field of slow-descent devices, and particularly relates to an independently installed elevator constant-speed slow-descent device. Background Art

[0002] Industrial lifts are widely used in special fields such as buildings, bridge towers, chimneys, and iron towers. They can transport people and equipment up and down. They come in various forms. When a power outage or other fault occurs during the operation of the lift, the lift car is likely to stop at a non-level position. At this time, it is necessary to manually release the main engine brake in the lift and use the weight of the car to slide down to the bottom floor to rescue people. During the descent, in order to ensure the safety of people and equipment, it is necessary to set up a uniform descent device to keep the descent speed below the safe speed.

[0003] At present, the uniform speed slow-down devices on the domestic market generally adopt the principle of centrifugal friction, that is, the uniform speed slow-down device is installed on the input shaft of the reduction box or the output shaft of the motor, and the centrifugal block and the shell are rotated at high speed to generate friction, thereby realizing the slow descent of the elevator. However, the centrifugal friction mechanism of this uniform speed slow-down device generates a lot of heat, has a small number of repeated uses, is prone to failure after being exposed to water and oil, and has reduced safety after aging; secondly, it is difficult to install and remove it from the motor or reducer, and it affects the operation of the equipment during removal; in addition, this uniform speed slow-down device needs to be installed on the drive or reducer, and needs to be adapted to the size of the reducer and motor, and its application scenarios are limited. Utility Model Content

[0004] The purpose of the utility model is to provide an independently installed elevator uniform speed slow descent device to solve the problems in the above-mentioned background technology that the slow descent device is prone to failure after being stained with water or oil, its safety is reduced after aging, its service life is short, it is inconvenient to install, and it can only be used for specific drive devices.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] An independently installed elevator uniform speed slow descent device comprises a planetary gearbox, a clutch, a slow descent mechanism and a housing; the planetary gearbox is fixed on the housing; the clutch and the slow descent mechanism are both arranged inside the housing;

[0007] The slow-descent mechanism is connected to the planetary gear transmission through a clutch, and includes a rotating shaft, a rotating wheel, an elastic component and a movable stopper; the rotating shaft is connected to the clutch; the rotating wheel is fixed on the rotating shaft, and convex portions and concave portions are alternately arranged on its surface; one end of the elastic component is fixed to the shell; the middle part of the movable stopper is rotatably connected to the shell, and the two sides of the movable stopper are respectively in contact with the rotating wheel and the elastic component, and the side close to the rotating wheel is arranged as a concave-convex surface, and the movable stopper and the elastic component are eccentrically arranged.

[0008] Furthermore, the movable stopper is designed to be approximately concave in shape, and the protruding portion is configured to be an arc.

[0009] Furthermore, the top of the convex part of the rotating wheel is a pointed tip, and the surface of the concave part is an arc.

[0010] Furthermore, the shell is arranged on the structure to be lowered of the elevator; the planetary gear box is meshedly connected to the guide rail rack, and the guide rail rack is vertically arranged.

[0011] Furthermore, the elastic component is a nitrogen spring.

[0012] Furthermore, the clutch is a normally closed electromagnetic clutch.

[0013] Furthermore, the housing comprises a first housing and a second housing; the clutch is arranged in the first housing; the slow-descent mechanism is arranged in the second housing; and the first housing is detachably connected to the second housing.

[0014] Furthermore, the elastic components are distributed at intervals along the circumference of the rotating wheel.

[0015] The utility model has the following beneficial effects:

[0016] 1. The utility model provides an independently installed elevator uniform speed slow descent device. When the elevator needs to be lowered, the motor brake lever is released, the equipment descends due to its own weight, and the rotation speed is increased through the planetary gear transmission, and the torque is reduced and transmitted to the engaged clutch. The clutch then transmits the energy to the slow descent mechanism, driving the rotating wheel to rotate, and the movable block rotates accordingly, compressing the nitrogen spring, and converting the mechanical energy of the rotating wheel into the potential energy of the nitrogen spring, thereby achieving a "capture" effect; when the movable block passes over the convex part of the rotating wheel, the nitrogen spring releases the potential energy, achieving an energy "vertical" effect, thereby controlling the descent speed of the elevator.

[0017] 2. The utility model provides an independently installed elevator uniform speed slow descent device, which does not need to be connected to a drive or reducer, thereby enhancing the applicability of the device and facilitating installation and replacement.

[0018] 3. The utility model provides an independently installed elevator uniform speed slow descent device, which has low environmental requirements and a long service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of the descent control device involved in the utility model;

[0020] Figure 2 The utility model is a schematic diagram of the structure of the slow descent mechanism.

[0021] In the figure: 1-planetary gear transmission, 2-clutch, 3-slow-down mechanism, 31-rotating shaft, 32-rotating wheel, 33-elastic component, 34-movable block, 4-housing. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] like Figure 1 , 2 As shown, the utility model provides an independently installed elevator uniform speed slow descent device, comprising a planetary gear transmission gearbox 1, a clutch 2, a slow descent mechanism 3 and a housing 4; the planetary gear transmission gearbox 1 is fixed on the housing 4; the clutch 2 and the slow descent mechanism 3 are both arranged inside the housing 4; the slow descent mechanism 3 is transmission-connected to the planetary gear transmission gearbox 1 through the clutch 2; the slow descent mechanism 3 comprises a rotating shaft 31, a rotating wheel 32, an elastic component 33 and a movable stopper 34; the rotating shaft 31 is transmission-connected to the clutch 2; the rotating wheel 32 is fixed on the rotating shaft 31, and convex portions and concave portions are alternately arranged on its surface; one end of the elastic component 33 is fixedly connected to the housing 4; the middle part of the movable stopper 34 is rotationally connected to the housing 4 so that it can rotate along the connection position, and the two sides of the movable stopper 34 are respectively in contact with the rotating wheel 32 and the elastic component 33, and the side close to the rotating wheel 32 is arranged as a concave-convex surface, and the movable stopper 34 and the elastic component 33 are eccentrically arranged so that the movable stopper 34 can swing to both ends as the rotating wheel 32 rotates.

[0024] The housing 4 is arranged on the structure to be lowered of the elevator, and the structure to be lowered includes a car, etc. The gears of the planetary gearbox 1 are meshed with the vertically arranged guide rail racks, so that the structure to be lowered moves slowly downward along the guide rail racks. The planetary gearbox 1 can realize the function of increasing speed and reducing torque, ensuring that braking can be achieved at the slow-down end with only a small torque.

[0025] The clutch 2 is preferably a normally closed electromagnetic clutch. The normally closed electromagnetic clutch automatically engages when the device is powered off, and can also be electrically controlled when powered on to achieve the connection between the input shaft of the planetary gearbox 1 and the rotating shaft 31.

[0026] The housing 4 includes a first housing and a second housing. The clutch 2 is arranged in the first housing, and the slow-descent mechanism 3 is arranged in the second housing. The first housing and the second housing are detachably connected to facilitate the maintenance of the device.

[0027] The rotating wheel 32 is similar to a bidirectional ratchet structure, wherein the top of the convex portion is a pointed tip and the surface of the concave portion is an arc, so as to achieve cooperation with the movable stopper 34 .

[0028] The end of the elastic component 33 contacts the end of the movable stopper 34, so that the movable stopper 34 can flexibly swing between the rotating wheel 32 and the elastic component 33. The elastic component 33 is preferably a nitrogen spring. The elastic components 33 are distributed at intervals along the circumference of the rotating wheel 32, and preferably three elastic components 33 are arranged.

[0029] The movable stopper 34 is designed to be approximately concave in shape, and the protruding portion is configured to be arc-shaped, so as to better match the surface of the rotating wheel 32 .

[0030] When the elevator needs to be lowered urgently, the motor brake lever is released, and the planetary gearbox 1 transmits the rotational energy of the gear and rack meshing to the clutch 2. The engaged clutch 2 transmits the energy to the descending mechanism 3, and when driving the rotating wheel 32 to rotate, it needs to overcome the resistance of the movable stopper 34. When the movable stopper 34 rotates, the nitrogen spring is compressed. At this time, the mechanical energy of the rotating wheel 32 is converted into the potential energy of the nitrogen spring, achieving a "capture" effect; when the movable stopper 34 passes the convex part of the rotating wheel 32, the nitrogen spring releases the potential energy, achieving an energy "vertical" effect, thereby reducing the impact during rotation.

[0031] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An independently installed elevator uniform speed slow descent device, characterized in that: It comprises a planetary gearbox (1), a clutch (2), a slow-descent mechanism (3) and a housing (4); the planetary gearbox (1) is fixedly mounted on the housing (4); the clutch (2) and the slow-descent mechanism (3) are both arranged inside the housing (4); The slow-descent mechanism (3) is transmission-connected to the planetary gearbox (1) via a clutch (2), and comprises a rotating shaft (31), a rotating wheel (32), an elastic component (33) and a movable stopper (34); the rotating shaft (31) is transmission-connected to the clutch (2); the rotating wheel (32) is fixedly mounted on the rotating shaft (31), and a convex portion and a concave portion are alternately arranged on its surface; one end of the elastic component (33) is fixedly connected to the housing (4); the middle portion of the movable stopper (34) is rotationally connected to the housing (4), and two sides of the movable stopper (34) are respectively in contact with the rotating wheel (32) and the elastic component (33); a side close to the rotating wheel (32) is arranged as a concave-convex surface, and the movable stopper (34) and the elastic component (33) are eccentrically arranged.

2. The independently installed elevator constant speed slow descent device according to claim 1, characterized in that: The movable stopper (34) is designed to be approximately in the shape of a concave letter "U", and the protruding portion is arranged in the shape of an arc.

3. The independently installed elevator constant speed slow descent device according to claim 1, characterized in that: The top end of the convex part of the rotating wheel (32) is a pointed tip, and the surface of the concave part is arc-shaped.

4. The independently installed elevator constant speed slow descent device according to claim 1, characterized in that: The housing (4) is arranged on the structure to be lowered of the elevator; the planetary gearbox (1) is meshedly connected to the guide rail rack, and the guide rail rack is arranged vertically.

5. The independently installed elevator constant speed slow descent device according to claim 1, characterized in that: The elastic component (33) is a nitrogen spring.

6. The independently installed elevator constant speed slow descent device according to claim 1, characterized in that: The clutch (2) is a normally closed electromagnetic clutch.

7. The independently installed elevator constant speed slow descent device according to claim 1, characterized in that: The housing (4) comprises a first housing and a second housing; the clutch (2) is arranged in the first housing; the slow-descent mechanism (3) is arranged in the second housing; and the first housing is detachably connected to the second housing.

8. The independently installed elevator constant speed slow descent device according to claim 1, characterized in that: The elastic components (33) are distributed at intervals along the circumference of the rotating wheel (32).

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