A self-rescue mechanism for screw elevator

Abstract

This invention provides a self-rescue mechanism for a screw elevator, including a screw lifting mechanism with a screw and a car. A locking assembly is installed on the car to achieve a detachable connection between the drive nut on the screw and the car. Then, a self-driving assembly with a movable nut is installed between the screw and the car. The self-driving operation part of the self-driving assembly is located inside the car, realizing an internal self-driving function: During normal elevator operation, the screw rotates, driving the car to move longitudinally, while the safety nut remains fixed relative to the car. When the elevator malfunctions and the screw cannot rotate, the passengers trigger the locking assembly from inside the car, unlocking the drive nut and detaching it from the car. Then, the safety nut is driven to rotate relative to the screw, achieving self-driving movement of the elevator car and thus self-rescue.

Description

Technical Field

[0001] The invention belongs to the technical field of elevator equipment, and specifically relates to a screw elevator self-rescue mechanism for self-rescue in the event of power failure or failure. Background Art

[0002] With the development and progress of society, the application of elevators has become more and more popular, especially home elevators have been accepted by more and more families, bringing great convenience to people's family life.

[0003] As a result, due to the excessive use of elevators, poor maintenance, quality problems of the elevators themselves, or the influence of the internal and external environment of the elevators, the elevators have brought great safety hazards. The sudden stop of the elevator causes people to be trapped in the elevator, and the people cannot get timely treatment, which seriously affects the personal safety of passengers. The currently commonly used self-rescue systems are complex to operate, have poor timeliness, and are not reliable. Summary of the invention

[0004] The present invention aims to provide a screw elevator self-rescue mechanism to solve the problems of complex operation and poor reliability of the screw elevator self-rescue system.

[0005] The specific scheme is as follows: A screw elevator self-rescue mechanism includes a screw lifting mechanism and a car arranged on the screw lifting mechanism, the screw lifting mechanism includes a screw, a drive nut is arranged on the screw, and the drive nut is installed on the car;

[0006] The car is also equipped with a self-driving component and a locking component:

[0007] The self-driving assembly includes a safety nut, a nut driving mechanism drivingly connected to the safety nut, and a self-driving operating unit arranged in the car;

[0008] The safety nut is arranged on the screw rod and is rotatably mounted on the car; the self-driving operating part is connected to the nut driving mechanism to drive the safety nut to rotate around the screw rod through the nut driving mechanism;

[0009] The locking assembly includes a locking mechanism, a locking driving mechanism for driving the locking mechanism to unlock, and an unlocking operating part arranged in the car;

[0010] The driving nut is connected to the car through the locking mechanism; the unlocking operation part is connected to the locking driving mechanism to drive the locking mechanism to unlock through the locking driving mechanism.

[0011] A further technical solution of the present invention is: there are two screw rods, which are respectively arranged on opposite sides of the car, each screw rod is provided with a driving nut, and correspondingly, there are two locking mechanisms, and the locking driving mechanism is respectively connected to the two locking mechanisms.

[0012] A further technical solution of the present invention is: the locking mechanism includes a pivotally mounted bearing seat, the upper end of the bearing seat is provided with a bearing block protruding toward the direction of the corresponding driving nut, thereby forming a hook structure, and a slot portion is also provided on the driving nut at a position corresponding to the bearing block.

[0013] A further technical solution of the present invention is: the lock drive mechanism is arranged between the two lock mechanisms, and comprises a release wheel, two pull rods and a rotating pressure rod;

[0014] The release wheel is rotatably mounted on the car, one end of each of the two pull rods is eccentrically pivoted to the release wheel, and the other ends of the two pull rods are respectively pivoted to the two hook structures, and the rotating pressure rod is connected to the release wheel to drive the release wheel to rotate.

[0015] A further technical solution of the present invention is: the unlocking operating part includes a small pulley and a disengagement handle connected to the small pulley, the disengagement handle is arranged in the car, a pull rope is wound around the small pulley, and the other end of the pull rope is guided by a pulley assembly and connected to the rotating pressure rod.

[0016] A further technical solution of the present invention is: a bracket is provided on the car at a position corresponding to the safety nut, the safety nut is provided below the bracket, and an end bearing is provided between the safety nut and the bracket; the end bearing is sleeved on the screw.

[0017] A further technical solution of the present invention is: the nut driving mechanism is a main shaft, the self-driving operating part is a pivotally mounted lifting handle; the two ends of the main shaft are respectively connected to the lifting handle and the safety nut through a bevel gear set.

[0018] Beneficial effects: The screw elevator self-rescue mechanism of the present invention comprises a screw lifting mechanism with a screw and a car, and a locking assembly is arranged on the car to realize a detachable connection between the driving nut on the screw and the car; then, a self-driving assembly with a movable nut is arranged between the screw and the car, and the self-driving operation part of the self-driving assembly is arranged inside the car, so as to realize the internal self-driving function: when the elevator is operating normally, the screw rotates to drive the car to move in depth, and the safety nut is fixed relative to the car; when the elevator fails and the screw cannot rotate, the occupant triggers the locking assembly from the car to unlock the driving nut and detach it from the car, and then drives the safety nut to rotate relative to the screw, so as to realize the self-driven movement of the elevator car in depth and realize self-rescue. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 The schematic diagram of the structure of the self-rescue mechanism of the screw elevator of the present invention is shown;

[0020] Figure 2 Shows Figure 1 A partial enlarged front view of

[0021] Figure 3 Shows Figure 1 a partial enlarged front view of another area;

[0022] Figure 4 Shows Figure 3 A partial enlarged view of point A in the middle. DETAILED DESCRIPTION

[0023] To further illustrate the various embodiments, the present invention provides drawings. These drawings are part of the disclosure of the present invention, which are mainly used to illustrate the embodiments and can be used in conjunction with the relevant descriptions in the specification to explain the operating principles of the embodiments. With reference to these contents, a person of ordinary skill in the art should be able to understand other possible implementations and advantages of the present invention. The components in the figures are not drawn to scale, and similar component symbols are generally used to represent similar components.

[0024] The present invention will now be further described with reference to the accompanying drawings and specific implementation methods.

[0025] Combination Figures 1 to 3 As shown, this embodiment provides a screw elevator self-rescue mechanism, which includes a screw lifting mechanism and a car arranged on the screw lifting mechanism.

[0026] The screw lifting mechanism includes two screws 1, each of which is provided with a driving nut 10. The two screws 1 are respectively provided at opposite sides of the car, and then the driving nuts 10 on the screws 1 are installed on the car.

[0027] The car includes a car top plate 12 and a car bottom plate 31 arranged up and down. The four car columns 22 are connected to the car top plate 12 at the upper ends and to the car bottom plate 31 at the lower ends to form a rectangular frame structure. The two drive nuts 10 are respectively arranged at opposite sides of the car top plate 12.

[0028] The car is also provided with a self-driving assembly and a locking assembly: in this embodiment, the locking assembly includes two locking mechanisms, a locking driving mechanism for driving the locking mechanisms to unlock, and an unlocking operating part arranged in the car.

[0029] The two locking mechanisms are both disposed on the car top plate 12 and are disposed at the positions of the two drive nuts 10 on opposite sides of the upper portion of the car top plate 12 to respectively lock and fix the corresponding drive nuts 10:

[0030] The locking mechanism includes a pivotally mounted bearing seat 8, the bottom end of which is pivotally mounted on the car roof 12, and the upper end is provided with a bearing block 7 protruding toward the corresponding driving nut 10, thereby forming a "7"-shaped hook structure. A slot portion is also provided on the driving nut 10 at a position corresponding to the bearing block. The bearing block 7 is pressed on the end face of the slot portion on the driving nut 10, and the slot portion is an inclined surface inclined outward and downward, thereby achieving self-locking and connecting the two driving nuts 10 to the car through the corresponding locking mechanism.

[0031] Since there are two locking mechanisms and one locking drive mechanism, in this embodiment, the locking drive mechanism is connected to the two locking mechanisms respectively:

[0032] The lock drive mechanism is arranged between the two lock mechanisms, and includes a release wheel 15, a first pull rod 2, a second pull rod 5 and a rotating pressure rod 4; the release wheel 15 and the rotating pressure rod 4 are installed on a rotating rod 3, and the rotating rod 3 is installed on a rotating rod seat 16, so that the release wheel 15 and the rotating pressure rod 4 can be rotatably installed on the car; the first pull rod 2 and the second pull rod 5 are both eccentrically pivoted to the release wheel 15 at one end, and then the other end is respectively pivoted to the upper end of the two supporting seats 8 of the hook structure. By rotating the release wheel 15, the supporting seat 8 can be swung around the pivot axis to deviate from the direction of the drive nut 10, so that the drive nut 10 is unlocked and disengaged from the car.

[0033] The unlocking operation part is connected to the lock driving mechanism to drive the lock mechanism to unlock through the lock driving mechanism:

[0034] The unlocking operation part includes a small pulley 18 and a disengagement handle 19 connected to the small pulley 18. The small pulley 18 is rotatably mounted on the frame structure of the car through a small pulley main shaft 20 and a small pulley bracket 17 on which the small pulley main shaft 20 is mounted, and the disengagement handle 19 is arranged in the car.

[0035] A steel wire rope 13 serving as a pull rope is wound around the small pulley 18, and the other end of the steel wire rope 13 is guided by a pulley assembly and connected to the rotating pressure rod 4. Specifically, the pulley assembly includes a first pulley group 11 and a second pulley group 14 arranged on the car top plate 12. One end of the steel wire rope 13 is fixed to the rotating pressure rod 4, and then after passing around the first pulley group 11 and the second pulley group 14, the other end is fixed to the pulley groove of the small pulley 18, thereby realizing that the disengagement handle 19 drives the rotating pressure rod 4 to swing, thereby driving the disengagement wheel 15 to rotate, and realizing the unlocking of the two locking mechanisms.

[0036] The self-driving assembly includes a safety nut 25, a nut driving mechanism drivingly connected to the safety nut 25, and a self-driving operating unit arranged in the car:

[0037] In this embodiment, there is only one safety nut 25, which is sleeved on a screw rod 1 and can be rotatably installed on the car. Specifically: a bracket 23 is provided on the car, and the bracket 23 is a rectangular frame connected to the bottom of the car top plate 12, and the bottom of the bracket 23 is connected to the car column 22 through a cross bar 21; then, an end face bearing 24 is also sleeved on the screw rod 1; the bracket 23 is provided at a position on the car corresponding to the safety nut 25, the safety nut 25 is provided below the bracket 23, and the end face bearing 24 is provided between the safety nut 25 and the bracket 23 to press and support the upper end of the safety nut 25.

[0038] The self-driving operating part is connected to the nut driving mechanism to be driven by the nut driving mechanism. The safety nut rotates around the screw:

[0039] In this embodiment, the nut driving mechanism is a main shaft 27, and the self-driven operating part is a lifting handle 30 pivotally mounted on the car; a third straight bevel gear 29 is provided on the rotating shaft of the lifting handle 30, and an end face straight bevel gear is provided on the lower end face of the safety nut 25. The two ends of the main shaft 27 are respectively provided with a first straight bevel gear 26 meshing with the bevel teeth on the safety nut 25 and a second straight bevel gear 28 meshing with the third straight bevel gear 29, so that the lifting handle 30 is rotated, that is, the safety nut 25 is driven to rotate around the screw 1.

[0040] Of course, it is understandable that in other specific embodiments: the locking mechanism can also be a latch mechanism; the car can also have its own backup battery, and then the locking drive mechanism or the nut drive mechanism is an electric drive mechanism, and the unlocking operation part and the self-driving operation part are operation buttons for starting the electric components.

[0041] Although the present invention has been specifically shown and described in conjunction with the preferred embodiments, it should be understood by those skilled in the art that various changes may be made to the present invention in form and details without departing from the spirit and scope of the present invention as defined by the appended claims, all of which are within the scope of protection of the present invention.

Claims

1. A screw elevator self-rescue mechanism, comprising a screw lifting mechanism and a car arranged on the screw lifting mechanism, wherein the screw lifting mechanism comprises a screw, a driving nut is arranged on the screw, and the driving nut is mounted on the car; It is characterized in that The car is also equipped with a self-driving component and a locking component: The self-driving assembly includes a safety nut, a nut driving mechanism drivingly connected to the safety nut, and a self-driving operating unit arranged in the car; The safety nut is arranged on the screw rod and is rotatably mounted on the car; the self-driving operating part is connected to the nut driving mechanism to drive the safety nut to rotate around the screw rod through the nut driving mechanism; The locking assembly includes a locking mechanism, a locking driving mechanism for driving the locking mechanism to unlock, and an unlocking operating part arranged in the car; The driving nut is connected to the car through the locking mechanism; the unlocking operation part is connected to the locking driving mechanism to drive the locking mechanism to unlock through the locking driving mechanism; There are two screw rods, which are respectively arranged on opposite sides of the car, and each screw rod is provided with a driving nut. Correspondingly, there are two locking mechanisms, and the locking driving mechanism is respectively connected to the two locking mechanisms; The locking mechanism includes a pivotally mounted bearing seat, the upper end of which is provided with a bearing block protruding toward the corresponding driving nut, thereby forming a hook structure, and a slot portion is also provided on the driving nut at a position corresponding to the bearing block; The lock drive mechanism is arranged between the two lock mechanisms, and comprises a release wheel, two pull rods and a rotating pressure rod; the release wheel is rotatably mounted on the car, one end of each of the two pull rods is eccentrically pivoted to the release wheel, and the other ends of the two pull rods are respectively pivoted to the two hook structures, and the rotating pressure rod is connected to the release wheel to drive the release wheel to rotate; The unlocking operation part includes a small pulley and a disengagement handle connected to the small pulley, the disengagement handle is arranged in the car, a pull rope is wound around the small pulley, and the other end of the pull rope is guided by the pulley assembly and connected to the rotating pressure rod; The nut driving mechanism is a main shaft, and the self-driving operating part is a pivotally mounted lifting handle; the two ends of the main shaft are respectively connected to the lifting handle and the safety nut through a bevel gear set.

2. The screw elevator self-rescue mechanism according to claim 1, characterized in that: A bracket is also provided on the car at a position corresponding to the safety nut. The safety nut is arranged below the bracket, and an end face bearing is also provided between the safety nut and the bracket; the end face bearing is sleeved on the screw rod.

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