Movable sectional supporting screw elevator

Abstract

Aiming at the technical problem that the lifting height of an existing screw elevator is limited, the invention provides a movable type sectional supporting screw elevator capable of dynamically increasing transverse supporting points of a screw along with the increase of the length of the screw, and the movable type sectional supporting screw elevator comprises the screw, a rotating nut, an elevator car, a movable supporting frame and a transverse supporting device. The rotating nut is sleeved on the screw rod, and the elevator car is supported by the rotating nut and moves up and down along the screw rod along with the rotating lifting of the rotating nut; transverse supporting devices such as supporting guide rails are fixed on a fixed building beside the screw rod; the movable supporting frame comprises a sliding supporting end and a base, the sliding supporting end surrounds the screw rod and can slide up and down along the screw rod, and the base is limited on the transverse supporting device, can slide up and down and cannot move transversely; the movable supporting frame is limited by the transverse supporting device to transversely support the screw rod. The movable support frame can be provided with lifting ropes which are adjacently connected up and down, and can be driven by the elevator car one by one to dynamically change the transverse support position of the screw along with the lifting of the elevator car. According to the screw elevator, the safety and stability problems that due to the fact that the lifting height of the screw elevator is increased, the strength and rigidity of the screw are reduced, and vibration noise is aggravated can be solved, and therefore the lifting height of the screw elevator and the market application value of the screw elevator are greatly improved.

Description

Technical Field

[0001] The present invention relates to a screw elevator, and more particularly to a mobile segmented support screw elevator. Background Art

[0002] Screw elevators are widely used in the field of home elevators due to their advantages such as simple structure, no machine room, no bottom pit, and no risk of falling and overtopping. However, there are also technical application problems such as limited lifting height, large vibration and noise, and high screw cost. To increase the lifting height of screw elevators and reduce the screw vibration and its noise during elevator operation, higher requirements need to be put forward for the safety and stability indicators and manufacturing costs of screws due to changes in their diameter, weight, load capacity, slenderness ratio, etc. At present, screw elevators are widely used in the villa elevator market of low-rise buildings, but the application in the mid- to high-rise elevator market still needs to be further promoted. Summary of the Invention

[0003] Technical Problems to be Solved by the Present Invention

[0004] In view of the limited lifting height of existing screw elevators and the safety and stability problems such as increased self-weight of the screw, higher bearing capacity requirements, increased risk of buckling deformation, and increased vibration in order to increase the lifting height, the present invention proposes a mobile segmented support screw elevator; by adding a mobile support device to the screw, the segmented lateral support position of the screw is automatically adjusted as the elevator car moves up and down, so as to improve the safety and stability problems such as reduced screw strength and increased buckling deformation caused by the increase in the lifting height of the screw elevator, and expand its technical application from low-rise to mid-rise building elevator markets.

[0005] Technical Solutions Adopted by the Present Invention to Solve Its Technical Problems

[0006] A mobile segmented support screw elevator proposed by the present invention includes: a screw, a rotating nut, an elevator car, a mobile support frame, and a lateral support device. The rotating nut is sleeved on the screw and can rotate and lift around the screw; the elevator car is connected to the rotating nut via a bearing and is supported by the rotating nut, and at the same time moves up and down along the screw as the rotating nut rotates and lifts.

[0007] The mobile segmented support screw elevator includes at least one screw, and at least one rotating nut is installed on each screw; the elevator car can be supported by one or more rotating nuts sleeved on one screw, or can be supported by multiple rotating nuts sleeved on multiple screws respectively.

[0008] The horizontal support device is fixed on a fixed building beside the screw; the movable support frame includes a sliding support end and a base, which are of an integral structure. Its sliding support end surrounds the screw and can slide up and down along the screw, and its base is restricted to slide up and down on the horizontal support device and cannot move horizontally; the movable support frame horizontally supports the screw through the restraint and limitation of the horizontal support device.

[0009] On the screws above and below the rotating nut of the elevator car, at least one movable support frame is installed on at least the lower screw; each movable support frame is successively driven by the elevator car and dynamically changes the position where it horizontally supports the screw as the elevator car moves up and down.

[0010] The horizontal support device of this mobile sectional support screw elevator can be a support guide rail vertically placed beside the screw and fixed on a steel frame or building, etc., or a horizontal support seat fixed on a fixed building beside the position of the required horizontal support height of the screw.

[0011] When its horizontal support device is a support guide rail, the base of the corresponding movable support frame is a track-following base. This track-following base is installed on the support guide rail and can slide up and down along the support guide rail, and at the same time is restricted by the support guide rail and cannot move horizontally; thus, the movable support frame is restricted from moving horizontally through its track-following base, thereby realizing its horizontal support for the screw.

[0012] To enable each movable support frame to horizontally support the screw at intervals, suspension ropes are installed at the upper and lower ends of each movable support frame, and each movable support frame is connected to the suspension rope connection devices adjacent to its upper and lower sides respectively through the suspension ropes, including the movable support frame, the elevator car, the screw top fixing device, and the ground fixed support device. And each movable support frame is suspended or pulled up by the suspension rope connection device adjacent to its upper side and dragged or pulled down by the suspension rope connection device adjacent to its lower side during the up and down movement of the elevator car.

[0013] Thus, when the elevator car ascends, each movable support frame located below the rotating nut of the elevator car is lifted one by one through the suspension rope, and each movable support frame located above the elevator car is supported by the elevator car and stacked on the elevator car one by one.

[0014] For the situation where the movable support frame cannot automatically slide down along the support guide rail by its own weight, when the elevator car descends, each movable support frame located below the rotating nut is stacked and lowered by being pressed down one by one, and each movable support frame located above the rotating nut of the elevator car is pulled down one by one by the elevator car through the suspension rope.

[0015] To prevent the suspension ropes from being mixed and stirred with each other when the movable support frames are stacked, a suspension rope automatic telescopic device that can pull out and bounce back the suspension rope can be installed on each movable support frame.

[0016] When the horizontal support device is a horizontal support base, there is no need to set up a support guide rail. Instead, only need to fix the horizontal support base on the fixed building beside the required horizontal support height position of the screw rod. At this time, the base of the moving support frame corresponding to this horizontal support base is a mechanical structure that can slide up and down, freely enter and exit this horizontal support base, and can be restricted by this horizontal support base from lateral displacement. Thus, multi-point horizontal support for the screw rod can be realized at the height positions where each horizontal support base is installed.

[0017] In addition, the moving support frames on the screw rods on the upper and lower sides of the elevator car can also be respectively placed in the upper and lower moving support frame automatic retracting and extending devices provided in the elevator car. That is, first install a moving support frame automatic retracting and extending device at the lower side of the rotating nut of the elevator car. The moving support frames located below the elevator car can all be retracted into it; at the same time, install a longitudinal locking device at the horizontal support device set at each horizontal support height position of the screw rod. When the elevator car carries the moving support frame and rises successively to each set horizontal support height position of the screw rod, the corresponding moving support frame will be successively released (including pulled out) from the moving support frame automatic retracting and extending device, and at the same time, be locked on the horizontal support device by the longitudinal locking device at the corresponding position and cannot move up and down; when the elevator car descends successively to each set screw rod horizontal support position, under the pressing action of the elevator car (including the components installed on the elevator car), the longitudinal locking device at the corresponding position is automatically unlocked, and its corresponding moving support frame is successively and automatically retracted by the moving support frame automatic retracting and extending device. Similarly for the moving support frame automatic retracting and extending device at the upper side part of the elevator car, the number of moving support frames can be set according to requirements to reduce the vibration and noise of the screw rod during the operation of the elevator.

[0018] For the mobile segmented support screw elevator of the present invention, an elastic sleeve is installed inside the sliding support end of the moving support frame. This elastic sleeve is coaxially sleeved on the outer surface of the screw rod and can freely slide up and down along the screw rod; the elastic sleeve can be made of elastic materials such as rubber. Its inner surface can be made of wear-resistant materials or metal sliding plates can also be installed. The wall thickness of its elastic sleeve should be less than the maximum lateral displacement allowed by the screw rod bending deformation index, so as to ensure horizontal support for the screw rod within the safe deformation index range.

[0019] In addition, when the screw rod of this mobile segmented support screw elevator corresponds to the case of a ball nut, a ball nut with a bearing can also be installed inside the sliding support end of the moving support frame. This ball nut can rotate relative to the moving support frame and is simultaneously sleeved on the screw rod. Thus, the ball nut can rotate and lift along the screw rod as the moving support frame moves linearly up and down.

[0020] Advantages of the present invention

[0021] In view of the technical bottleneck of the limited lifting height of traditional screw elevators, the present invention proposes an innovative mobile segmented support screw elevator, which significantly improves the lifting height and safety stability of the screw elevator through a dynamic support system. The screw elevator can dynamically adjust the lateral support position of the screw by means of a lateral support device, a mobile support frame, a suspension rope, an automatic retracting and extending device for the mobile support frame, and a longitudinal locking device, etc., to suspend or carry the mobile support frame one by one and adjust it with the lifting and lowering of the elevator car, so as to solve the problems of unbalanced load pressure distribution caused by the increase in screw length and the exceeding of the length-diameter ratio, the exponential increase in the risk of bending deformation caused by the increase in the self-weight of the screw, and the aggravation of the resonance effect on the vibration and noise level during operation, etc., which are related to safety and stability. Thereby, the lifting height and market application value of the screw elevator are greatly improved, and it is especially suitable for the extended application from low-rise villa elevators to mid-rise building elevator markets.

[0022] Brief Description of the Drawings.

[0023] Figure 1 : Schematic diagram of a mobile segmented support screw elevator

[0024] 1 Elevator car

[0025] 2 Rotating nut

[0026] 3 Screw

[0027] 4 Ground fixed support device

[0028] 5 Mobile support frame

[0029] 6 Guide wheel

[0030] 7 Support guide rail

[0031] 8 Sliding support end

[0032] 9 Automatic retracting and extending device for the mobile support frame

[0033] 10 Suspension rope

[0034] 11 Suspension rope telescoping device

[0035] 12 Longitudinal locking device

[0036] 13 Elastic bushing

[0037] Figure 1 It is a schematic diagram of a mobile segmented support screw elevator.

[0038] Among them, the elevator car 1 is equipped with a rotating nut 2, the rotating nut 2 is installed on the screw 3, the lower end of the screw 3 is fixedly supported on the ground fixed support device 4, and the upper end is fixed on the fixing device at the top of the screw; the elevator car 1 moves up and down along the screw 3 through the rotational displacement of the rotating nut 2.

[0039] The base of the movable support frame 5 is a track - following base, which is equipped with guide wheels 6. The guide wheels 6 are installed on the support rail 7. The movable support frame 5 can slide up and down along the support rail 7 through the guide wheels 6 and is restricted from lateral movement by the support rail 7. An elastic sleeve is provided on the sliding support end 8 of the movable support frame 5 and sleeved on the screw 3. At the same time, a rigid sliding piece with wear - resistance and a small friction coefficient is installed on the inner contact surface with the screw 3. The rigid sliding piece is fixed on the inner side of the elastic sleeve made of elastic materials such as rubber. Thus, the movable support frame 5 can slide up and down along the screw 3 and is laterally supported on the screw 3 by the restraint of the support rail 7.

[0040] An automatic retracting and extending device 9 for the movable support frame is provided at each of the upper and lower sides of the elevator car 1 with respect to the rotating nut 2. The upper side can accommodate 2 movable support frames 5, which are mainly used for lateral support when reducing the vibration and noise of the screw 3 on the upper side of the elevator car 1 during elevator operation; the lower side can accommodate 5 movable support frames 5, which are mainly used for lateral support when preventing the screw 3 on the lower side of the elevator car 1 from being bent and deformed due to load. Suspension ropes 10 are installed at both the upper and lower ends of the movable support frame 5 and are respectively connected to the adjacent suspension rope connection devices above and below (including the elevator car 1, the movable support frame 5, the ground fixed support device 4, and the screw top fixing device). The suspension ropes 10 can be pulled out from and retracted by the suspension rope telescopic device 11 with an elastic mechanism provided inside the movable support frame 5. The length of the suspension ropes between the movable support frames 5 is the distance between the preset lateral support positions.

[0041] During the up - and - down movement of the elevator car 1, each movable support frame 5 can be successively pulled out from the automatic retracting and extending device 9 for the movable support frame through the suspension of the adjacent suspension rope connection device above the suspension rope 10 and the downward pull of the adjacent suspension rope connection device below the suspension rope 10, and is buckled on the longitudinal locking device 12 composed of an elastic mechanism installed at the preset lateral support position, so as to achieve lateral support for the screw 3 at each specified height position. When the up - and - down movement of the elevator car 1 drives the automatic retracting and extending device 9 for the movable support frame to push up and press down the movable support frame 5 temporarily buckled on the longitudinal locking device 12, the longitudinal locking device 12 is squeezed and expanded to be automatically unlocked, and at the same time, the movable support frame 5 is squeezed into the gourd - shaped elastic bushing 13 inside the automatic retracting and extending device 9 for the movable support frame (see the right - hand cross - sectional view in Figure 1 ), thus completing the automatic retraction action of the corresponding movable support frame 5.

[0042] Figure 2 : Schematic diagram of the lateral support seat

[0043] 1 Fixed base

[0044] 2. Support arm.

[0045] 3 Fixed building

[0046] 4. Groove

[0047] 5. Moving support frame

[0048] 6. Sliding base

[0049] 7. Sliding support end

[0050] 8. Ridge

[0051] 9. Elastic sleeve

[0052] 10. Screw rod

[0053] Figure 2 It is a schematic diagram when the lateral support device does not require a support guide rail and only sets a lateral support seat at the specified lateral support position. Among them: the right side is a side view, and the left side is a top view. This figure is a partial schematic diagram at the position where the lateral support seat is set.

[0054] The lateral support seat shown in the figure is composed of a fixed base 1 and a support arm 2. The fixed base 1 is fixed on the fixed building 3. A vertical groove 4 is provided inside the support arm 2. The moving support frame 5 is composed of a sliding base 6 and a sliding support end 7. A ridge 8 is provided on the outside of the sliding base 6. The sliding base 6 and its ridge 8 can be driven by the elevator car to slide up and down into and out of the support arm 2 of the lateral support seat, and its ridge 8 can slide up and down in the groove 4 but cannot move horizontally. The moving support frame 5 can be locked by a longitudinal locking device installed at this lateral support seat position and cannot move up and down.

[0055] An elastic sleeve 9 is provided inside the sliding support end 7 of the moving support frame 5, and it is sleeved on the screw rod 10; the sliding support end 7 can slide up and down along the screw rod 10 through its smooth, wear-resistant elastic sleeve 9 made of materials such as rubber. Coupled with the fact that the lateral displacement of the sliding base 6 of the moving support frame 5 is limited, the lateral support of the moving support frame 5 to the screw rod 10 can be realized at this position.

[0056] The wall thickness of the elastic material of the elastic sleeve 9 should not exceed the maximum safe displacement of the screw rod bending deformation at the corresponding height.

Claims

1. A mobile sectional support screw elevator comprises a screw, a rotating nut, an elevator car, a mobile support frame and a transverse support device, characterized in that: The rotating nut is sleeved on the screw rod and can rotate and lift around the screw rod; the elevator car is connected to the rotating nut via a bearing and supported by the rotating nut, and at the same time moves up and down along the screw rod as the rotating nut rotates and lifts; the mobile segmented support screw elevator includes at least one screw rod and one rotating nut, and its elevator car is supported by at least one rotating nut; The lateral support device is fixed on the fixed building beside the screw rod; the mobile support frame includes a sliding support end and a base, which are of an integral structure; Its sliding support end surrounds the screw rod and can slide up and down along the screw rod, and its base is defined on the lateral support device and can slide up and down but cannot move laterally; the mobile support frame laterally supports the screw rod through the limitation of the lateral support device; At least one mobile support frame is installed on at least the lower side screw rod among the upper and lower sides of the elevator car rotating nut; the mobile support frame is driven by the elevator car and dynamically changes the position of its lateral support for the screw rod as the elevator car rises and falls.

2. The mobile sectional support screw elevator according to claim 1, characterized in that The lateral support device of its mobile support device is a support guide rail, and the base of the mobile support frame is a track-following base; the track-following base is installed on the support guide rail and can move up and down along the support guide rail, and at the same time is restricted by the support guide rail and cannot move laterally.

3. A mobile sectional support screw elevator according to claim 1 and claim 2, characterized in that A lifting rope is installed on the mobile support frame, and each mobile support frame is connected to the lifting rope connection devices adjacent to its upper and lower sides respectively through the lifting rope; the said lifting rope connection devices include the elevator car, the fixing device at the top of the screw rod, the ground support fixing device and the mobile support frame.

4. A mobile segmented support screw elevator according to claims 1 to 3, characterized in that When the elevator car rises, each mobile support frame located below the elevator car is lifted one by one by the elevator car via the lifting rope, and each mobile support frame located above the elevator car is supported by the elevator car and stacked on the elevator car one by one.

5. A mobile sectional support screw elevator according to claims 1 to 3, characterized in that When the elevator car descends, each mobile support frame located below the elevator car is pressed down by the elevator car and stacked and lowered one by one, and each mobile support frame located above the elevator car is lowered one by one by the elevator car pulling down the lifting rope.

6. A mobile sectional support screw elevator according to claims 1 to 3, characterized in that Its mobile support frame is equipped with an automatic telescopic device for the lifting rope to pull out and retract the lifting rope.

7. A mobile sectional support screw elevator according to claim 1, characterized in that Its lateral support device is a lateral support seat, and the lateral support seat is fixed on the fixed building beside the required lateral support position of the screw rod; when the mobile support frame is driven by the elevator car to rise and fall to this position, the base of the mobile support frame is defined by the lateral support seat and cannot displace laterally, and the mobile support frame laterally supports the screw rod at this height position.

8. A mobile sectional support screw elevator according to claims 1 to 3 and claim 7, characterized in that A mobile support frame automatic retracting and deploying device is provided at the lower side part of the elevator car where the rotating nut is located, and the mobile support frames located below the elevator car can all be stored therein; At the same time, a longitudinal locking device is provided at the lateral support device at each set screw rod lateral support position; when the elevator car carries the mobile support frame and rises successively to each set screw rod lateral support position, the corresponding mobile support frame will be released one by one from the mobile support frame automatic retracting and deploying device, and at the same time will be locked on the lateral support device by the longitudinal locking device at the corresponding position and cannot move up and down; when the elevator car descends successively to each preset screw rod lateral support position, under the pressing action of the elevator car, the longitudinal locking device at the corresponding position automatically releases the longitudinal locking of the mobile support frame at this place, and its mobile support frame is automatically retracted one by one by the mobile support frame automatic retracting and deploying device.

9. A mobile sectional support screw elevator according to claim 1, characterized in that an elastic sleeve is installed inside the sliding support end of the mobile support frame, the elastic sleeve is coaxially sleeved on the outer surface of the screw, and can freely slide up and down along the screw; at the same time, the wall thickness of the elastic sleeve is less than the maximum lateral displacement allowed by the bending deformation of the screw.

10. A mobile sectional support screw elevator according to claim 1, characterized in that a bearing is installed inside the sliding support end of the mobile support frame, a ball nut is installed inside the bearing, and the ball nut is sleeved on the screw and rotates and lifts along the screw as the mobile lifting frame rises and falls.

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