Elevator capable of being connected with screws

Abstract

The invention provides an elevator capable of being connected with a screw. The elevator comprises a supporting screw, a rotating nut, a screw claw clamp, an elevator car and a driving device. The supporting screw rod is composed of a plurality of sectional screw rods, and the sectional screw rods are connected into a whole through connecting ports of the sectional screw rods. A screw claw clamp is arranged on the segmented screw and is used for clamping and fixing the segmented screw and providing longitudinal supporting force for the segmented screw; when the screw claw clamp is opened, the rotating nut can freely penetrate through the supporting screw, and the elevator car is driven to ascend and descend synchronously. And the rotating nut and the screw claw clamp are respectively driven by respective driving devices in a centralized or independent manner. According to the screw elevator, through relay type butt joint of the segmented screws, the elevator running screws can be prolonged without limitation, meanwhile, the elevator freely ascends and descends on the whole supporting screws through opening and closing actions of the screw claw clamps, and therefore the technical application bottleneck that the lifting height of the screw elevator is limited is solved.

Description

Technical Field

[0001] The invention relates to a screw elevator, in particular to a connectable screw elevator. Background Art

[0002] At present, screw elevators mostly use a nut wrapped around a screw rod, and the rotation of the nut or screw rod drives the elevator car to rise and fall. Due to its advantages of simple structure, safety, and small space occupation, it is widely used in the market. However, due to the limitation of the integration of its screw rod, in actual application, as the lifting height increases, it has many technical problems in terms of manufacturing length, bearing capacity, support stability, transportation and installation, etc., resulting in the difficulty of overcoming the application bottleneck of screw elevators in the market of higher-rise buildings due to its limited lifting height in actual application. Summary of the invention

[0003] Technical Problems to be Solved by the Invention

[0004] The present invention relates to a connectable screw elevator, which mainly aims at the technical bottleneck of limited lifting height when the existing screw elevators are used on higher floors, and proposes a connectable screw elevator with segmented docking and segmented fixed support; through the relay docking of the segmented screws, the elevator running screw can be extended unlimitedly, and at the same time, through the segmented fixed support of the screw by the screw claws, the support of the screw and the weight of its carrier can be dispersed from the ground to the lateral support, thereby reducing the overall weight of the supporting screw and its manufacturing cost; further, through the opening and closing action of the screw claws, the rotating nut of the screw elevator can pass through the position set by the screw claws without obstacles, so that the elevator can be freely lifted and lowered on the entire supporting screw, thereby solving the technical problem of limited lifting height of the screw elevator.

[0005] The technical solution adopted by the present invention to solve the technical problem

[0006] The present invention provides a connectable screw elevator, comprising a supporting screw, a rotating nut, a screw claw clamp, an elevator car and a driving device, wherein:

[0007] The support screw is arranged longitudinally and is composed of at least two segmented screws; at least one end of the segmented screw is provided with a connection port; the segmented screws located at the uppermost and lowermost ends of the support screw only need to have a connection port at one end; and the other segmented screws located in the middle have connection ports at both ends; the two segmented screws can be connected to each other through the docking of their connection ports, and their threaded tracks are also interconnected. The docking of the connection ports of the two segmented screws can be achieved by threaded fastening and clamping, or by welding during installation, and it is ensured that the threaded tracks of the two segmented screws are interconnected.

[0008] The rotating nut includes a fixed end and a rotating end; the rotating end is movably connected to the fixed end and can rotate relative to the fixed end; the rotating end of the rotating nut is screwed onto the support screw and can be lifted and lowered along the support screw, which simultaneously drives the fixed end of the rotating nut to be lifted and lowered synchronously along the support screw; a connection device with the elevator car is provided on the fixed end of the rotating nut, and the lifting and lowering of the fixed end of the rotating nut drives the elevator car to be lifted and lowered synchronously. The rotating nut is usually provided with one rotating nut, but considering the weight of the elevator car and its operating stability, two rotating nuts can also be provided to simultaneously support the elevator car up and down and rotate synchronously.

[0009] The elevator car can be a closed car, a semi-closed car or an open car.

[0010] The screw rod claw pliers consist of a claw and a pliers body. The claw is set on the pliers body and is an opening and clamping structure. The pliers body is fixed on a fixed support beside the support screw. When the claw clamps the support screw, it fixes the support screw so that it does not move, and also provides axial support force to the support screw. When the claw is opened, the rotating nut is allowed to pass through the claw jaws along the support screw. In order to increase the clamping force and supporting force of the screw claw on the support screw, the inner side of the claw jaw of the screw claw pliers can be provided with an internal thread that interlocks with the screw thread.

[0011] At least one screw claw clamp is set on the support screw; in order to reduce the weight, volume and manufacturing cost of the support screw, multiple screw claw clamps can be set to convert the individual support of the support screw by the ground into the common support of multiple screw claw clamps in a clamped state on the ground and the support screw.

[0012] To this end, two screw claws can be provided on each segmented screw, and the two screw claws are respectively provided on the upper and lower sides of the segmented screw, and when one of the screw claws is opened, the other is in a clamped state, so that the segmented screw is always clamped by at least one screw claw. In order to maintain the safety and stability at the interface of the two segmented screws, the screw claw provided on the lower side of each segmented screw can be provided at the interface between the lower end of the segmented screw and the segmented screw below it, so that the screw claw can simultaneously clamp and release the two segmented screws above and below its interface.

[0013] In order to ensure the smooth lifting and lowering of the rotating nut, the distance between the two adjacent screw claws should be greater than the total distance of the maximum moving distance of the rotating nut during the lifting and lowering of the rotating nut along the supporting screw, from the time when the rotating nut completely enters the distance between the two adjacent screw claws, to the time when one screw claw changes from a fully opened state to a clamped state, and then the other screw claw changes from a clamped state to a fully opened state, plus the height of the rotating nut itself. In this way, the rotating nut is not hindered from freely lifting and lowering when the screw claws are opened and clamped in sequence.

[0014] Since the screw claw clamp provides a supporting force to the support screw when clamped, the support screw and its bearing are no longer supported by the ground alone, but are supported by the ground and the screw claw clamp clamping the support screw together.

[0015] Furthermore, as the number of segmented screws connected to each other on the support screw increases, in order to prevent the support screw from being too long and causing extrusion deformation on the lower part of the screw, the supporting strength of the screw claws set on each segmented screw of the support screw also needs to be increased accordingly, that is, the axial supporting force of the support screw is more dispersed to the fixed building beside the support screw, until the segmented screw and its load are completely supported by the screw claws in a clamped state on the segmented screw, that is, they are completely supported by the fixed building beside the support screw.

[0016] The driving device includes a rotating nut driving device and a screw claw driving device. The rotating nut driving device is connected to the rotating end of the rotating nut and drives its rotating end to rotate relative to its fixed end; when the screw elevator is supported by multiple supporting screws, the rotating nuts on each supporting screw can be driven independently by their respective driving devices, or can be centrally driven by a common driving device. The screw claw driving device is connected to the claw of the screw claw and drives its claw to open and clamp. The driving device can be an electric driving device; but for the screw claw that requires a larger clamping force, the screw claw driving device can also be considered to be an electric hydraulic driving device.

[0017] Beneficial effects of the present invention

[0018] The present invention proposes a connectable screw elevator, which can extend the support screw without limit through the multi-stage docking of its segmented screws, and can greatly reduce the overall weight of the screw and its manufacturing cost through the segmented fixed support of its screws. In addition, through the opening and closing structure of the screw claws, the rotating nut can pass through the entire screw without obstacles, driving the elevator car to achieve free lifting without height restrictions. Therefore, the present invention not only solves the technical problem of the limited lifting height of the existing screw elevators, but also can greatly expand its market application in the field of elevators for higher floors on the basis of giving full play to the existing technology and market advantages of screw elevators. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 :Schematic diagram of connectable screw elevator

[0021] Support screw

[0022] Elevator Car

[0023] Segmented screw

[0024] Connection Ports

[0025] Male threaded port

[0026] Female female threaded ports

[0027] Fixed end

[0028] Rotating end

[0029] Connecting device

[0030] Claw forceps

[0031] Clamp body

[0032] Rotary nut drive motor

[0033] Screw claw drive motor

[0034] Gear Set

[0035] Transmission belt

[0036] Figure 1 It is a partial schematic diagram of a connectable screw elevator.

[0037] The figure shows the structural relationship of the various components during the lifting of the screw elevator.

[0038] The screw elevator is composed of a supporting screw 1, a rotating nut, a screw claw clamp, an elevator car 2 and a driving device.

[0039] The screw elevator is supported by two left and right supporting screws 1, each supporting screw 1 is composed of at least two segmented screws 3, and each segmented screw 3 has at least one end provided with a connection port 4; the segmented screws 3 located at the uppermost and lowermost ends of the supporting screw 1 have only one end provided with a connection port 4, while the segmented screws 3 located at other parts of the supporting screw 1 have connection ports 4 at both ends; the two segmented screws 3 can be connected as a whole by docking their connection ports 4, and their threaded tracks are also interconnected.

[0040] In the figure, the connection ports 4 of the two segmented screws 3 are connected by a threaded fastening structure, that is, one end of each segmented screw 3 is a convex external thread port 4, and the other end is a concave internal thread port 5. After the two segmented screws 3 are connected to each other, the thread tracks of the two segmented screws 3 also remain connected to each other.

[0041] A rotating nut is provided on each support screw 1, and the rotating nuts on the left and right support screws are respectively fixedly connected to the left and right ends of the upper part of the elevator car 2 through the connection devices 9 of their respective fixed ends 7, and jointly support the lifting and lowering of the elevator car 2. The rotating nut includes a fixed end 7 and a rotating end 8, and the rotating end 8 is movably connected to the fixed end 7 and can rotate relative to the fixed end 7; the rotating end 8 of the rotating nut is screwed on the support screw 1, and can be spirally lifted and lowered along the support screw 1, and at the same time, its lifting and lowering drives the fixed end 7 of the rotating nut to rise and fall synchronously, and then drives the elevator car 2 connected to the fixed end 7 of the rotating nut through the connection device 9 to rise and fall synchronously with it.

[0042] The screw rod claw pliers are composed of a claw pliers 10 and a pliers body 11; the claw pliers 10 are arranged on the pliers body 11 and can be opened and clamped. The pliers body 11 of the screw rod claw pliers is fixed on a fixed support 12 beside the support screw 1. When the claw pliers 10 clamp the support screw 1, the support screw 1 is fixed so that it does not move, and an axial support force is also given to the support screw 1; when the claw pliers 10 are opened, the rotating nut is allowed to pass through the jaws of the claw pliers 10 along the support screw 1. In order to increase the clamping force and supporting force of the screw rod claw pliers on the support screw 1, the inner side of the jaws of the claw pliers 10 of the screw rod claw pliers is provided with an internal thread that interlocks with the screw thread.

[0043] Each segmented screw 3 of the support screw 1 is provided with two screw claws, one is provided on the upper side of the segmented screw 3, and the other is provided at the connection port 4 at the lower end of the segmented screw, and can clamp and release the two segmented screws 3 on the upper and lower sides of the connection port 4 at the same time, that is, it is equivalent to a special screw claw for the connection port 4. In order to ensure the free lifting and lowering of the rotating nut and the safety and stability of the connection port 4 during its lifting and lowering operation, the distance between the special screw claw of the connection port 4 and its adjacent screw claw should be greater than the total distance of the maximum moving distance of the lifting and lowering operation of the rotating nut plus the height of the rotating nut itself during the lifting and lowering process of the rotating nut along the support screw 1, from when the rotating nut completely enters the distance between its two adjacent screw claws, to when one screw claw changes from a fully opened state to a clamped state, and then the other screw claw changes from a clamped state to a fully opened state.

[0044] Considering the safety of the connection ports 4 of the two segmented screws 3, the connection ports 4 of the segmented screws 3 of the left and right supporting screws 1 will not be set in the same horizontal area to prevent the elevator cars 2 carried by the rotating nuts on the left and right sides from passing through the relatively weak connection port 4 area at the same time.

[0045] The driving device includes a rotating nut driving motor 12 and a screw claw driving motor 13. Since the screw elevator is supported by two supporting screws 1, the left and right rotating nuts can be centrally driven by a rotating nut driving motor; that is, the rotating nut driving device 12 drives the left and right transmission belts 15 through the gear set 14 to drive the left and right rotating nut rotating ends 8 connected to the transmission belts 15 respectively, so that the rotating nut rotating ends 8 rotate relative to the fixed ends 7 and spirally lift around the supporting screw 1. The screw claw driving device 13 is connected to the claw 10 of the screw claw and drives the claw 10 to open and clamp independently. Its driving device is an electric driving mode, and an electric hydraulic driving mode can also be selected according to the requirements of clamping force and the like.

Claims

1. A connectable screw elevator comprises a support screw, a rotating nut, a screw claw clamp, an elevator car and a driving device, wherein: The supporting screw is arranged longitudinally and is composed of at least two segmented screws; at least one end of the segmented screw is provided with a connection port; the two segmented screws are connected as a whole through their connection ports, and their threaded tracks are mutually connected; The rotating nut is arranged on the support screw, and each support screw is provided with at least one rotating nut. The rotating nut includes a fixed end and a rotating end; the rotating end is movably connected to the fixed end and can rotate relative to the fixed end; the rotating end of the rotating nut is screwed on the support screw, and it is lifted and lowered along the support screw, and drives the fixed end of the rotating nut to be lifted and lowered synchronously along the support screw; the fixed end of the rotating nut is provided with a connection device with the elevator car, and the lifting and lowering of the fixed end of the rotating nut drives the elevator car to be lifted and lowered synchronously; The screw rod claw pliers are composed of a claw pliers and a pliers body; the claw pliers are arranged on the pliers body and are an opening and clamping structure, and the pliers body is fixed on a fixed support beside the support screw; when the claw pliers clamp the support screw, the support screw can be fixed without displacement, and at the same time, there is an axial support force on the support screw; when the claw pliers are opened, the rotating nut is allowed to pass through the claw pliers jaws along the support screw; At least one screw claw clamp is arranged on the supporting screw; The driving device comprises a rotating nut driving device and a screw claw clamp driving device; The rotating nut driving device is connected to the rotating end of the rotating nut and drives the rotating end to rotate relative to the fixed end; the screw claw driving device is connected to the claw of the screw claw and drives the claw to open and clamp.

2. A connectable screw elevator according to claim 1, characterized in that The inner side of the jaws of the screw rod claw pliers is provided with internal threads which are locked with the screw rod threads.

3. A connectable screw elevator according to claim 1, characterized in that Two screw claws are arranged on each segmented screw, which are respectively arranged on the upper and lower sides of the segmented screw; the two screw claws are opened at different times.

4. A connectable screw elevator according to claim 1 and claim 3, characterized in that The screw claw clamp arranged at the lower side of each segmented screw is arranged at the interface between the lower end of the segmented screw and the segmented screw below it, and the screw claw clamp simultaneously clamps and releases the upper and lower segmented screws at its interface.

5. A connectable screw elevator according to claim 1, characterized in that The distance between two adjacent screw claws is greater than the total distance of the maximum moving distance of the rotating nut during the lifting process of the rotating nut along the supporting screw, starting from when it completely enters the distance between its two adjacent screw claws, to when one screw claw moves from a fully open state to a clamped state, and then the other screw claw moves from a clamped state to a fully open state, plus the height of the rotating nut itself.

6. A connectable screw elevator according to claim 1, characterized in that The butt joint of the two segmented screw rods is a spiral fastening structure. When the two segmented screw rods are tightened, their thread tracks are interpenetrating.

7. A connectable screw elevator according to claim 1, characterized in that The butt joint of the two segmented screws is a welding structure, and the welding interface keeps the thread tracks of the two segmented screws interpenetrating with each other.

8. A connectable screw elevator according to claim 1, characterized in that The supporting screw rod and the load thereof are supported by the ground and screw rod claws for clamping the supporting screw rod.

9. A connectable screw rod lifting device according to claim 1 and claim 8, characterized in that At least one segmented screw and its bearing object on the supporting screw are completely supported by the screw claws in a clamped state on the segmented screw.

10. A connectable screw elevator according to claim 1, characterized in that Its rotating nut driving device is a centralized driving device.

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