Vertical lifting landing door of lead screw three-linkage household elevator

Abstract

The utility model provides a lead screw three-linkage household elevator vertical lifting landing door, which is characterized in that the inner sides of a left frame and a right frame of a landing door frame are respectively provided with three vertical slideways which are vertically arranged and are parallel to one another, and the top end of the landing door frame is provided with a power accommodating space; the three lead screw transmission assemblies comprise three pairs of transmission lead screws and three pairs of nut sliding blocks, the three pairs of transmission lead screws are installed in the three vertical sliding ways of the left frame and the right frame in a pairwise opposite mode, and all nuts are in sliding fit with the installed vertical sliding ways; the driving motor and the transmission gear set are installed in the power containing space at the top end of the landing door frame, and the driving motor drives the three lead screw transmission assemblies to rotate at different speeds through the transmission gear set. The three landing doors are sequentially installed between the landing door frames in a staggered mode from front to back, and the two ends of each landing door are fixedly connected with the nuts in the matched sliding ways correspondingly. And the driving motor drives the three landing doors to operate at different lifting speeds. The landing door has the advantages of being durable, simple in structure and suitable for the home environment.

Description

Technical Field

[0001] The utility model relates to the technical field of household elevators. Specifically, it relates to a vertically lifting landing door for a household ladder with a triple-linkage screw rod. Background Art

[0002] The vertically sliding door of an elevator hardly occupies the space of the hoistway and has the largest opening width. Due to structural limitations, it is currently only used in large freight elevators.

[0003] The vertically sliding doors in the prior art usually have two or three door panels. Taking two door panels as an example, there are a fast door with a relatively fast lifting speed and a slow door with a relatively slow lifting speed. The lifting of the fast door is directly driven by a driving motor and a suspension chain, while the slow door is linked with the fast door through a transmission chain.

[0004] The suspension chain and the transmission chain can be made of wire ropes or chains. If wire ropes are used, the wire ropes are prone to wear and breakage after long-term use. If chains are used, they will rust or fatigue and break due to poor lubrication after long-term use, becoming a safety hazard.

[0005] For example, in the utility model patent with the application number CN202022996611.X and the name of "A Transmission and Suspension System for a Vertically Sliding Door of an Elevator", a belt and a wire rope belt body chain are used to save costs. However, the elevator in a home scenario has the characteristics of low usage frequency, long service life requirement, and long maintenance interval requirement. This kind of transmission system of consumables prone to wear can ensure performance by regular replacement in a commercial scenario, but the home scenario requires economy and durability. Therefore, it is necessary to design a vertically lifting landing door that is durable, has a simple structure, and is suitable for a home environment. Content of the Utility Model

[0006] The purpose of the utility model is to overcome the deficiencies of the prior art, and thus provide a vertically lifting landing door for a household ladder with a triple-linkage screw rod that is durable, has a simple structure, and is suitable for a home environment.

[0007] To achieve the above purpose, the technical solution adopted by the utility model is: a vertically lifting landing door for a household ladder with a triple-linkage screw rod, including a landing door frame, a driving motor, a transmission gear set, three screw rod transmission assemblies, and three landing doors;

[0008] Three vertically arranged and parallel vertical slideways are respectively arranged on the inner sides of the left frame and the right frame of the landing door frame, and a power accommodation space is arranged at the top of the landing door frame;

[0009] The three sets of the screw rod transmission assemblies include three pairs of transmission screw rods and three pairs of nut sliders. The nut sliders are in sliding fit with the transmission screw rods one by one. The three pairs of transmission screw rods are respectively installed in three vertical sliding channels of the left frame and the right frame in a pairwise opposite manner. Each nut is in sliding fit with the installed vertical sliding channel. The top ends of the transmission screw rods extend to the top end of the landing door frame.

[0010] The driving motor and the transmission gear set are installed in the power accommodating space at the top end of the landing door frame. The driving motor drives the three sets of screw rod transmission assemblies to rotate at different speeds through the transmission gear set.

[0011] Three landing doors are installed between the landing door frames in a front-back staggered manner in sequence. The two ends of each landing door are respectively embedded in the vertical sliding channels of the left frame and the right frame and fixedly connected to the nuts in the adapted sliding channels.

[0012] The driving motor drives the three sets of screw rod transmission assemblies through the transmission gear to drive the three landing doors to open or close the landing door at different lifting speeds.

[0013] Preferably, the landing door frame includes the left frame, the right frame, a bottom frame and a top frame. The left frame, the right frame, the bottom frame and the top frame are sequentially assembled and connected together to form a door-shaped structure.

[0014] Preferably, the structures of the left frame and the right frame are symmetrical, and three vertical sliding channels arranged at equal intervals in the front-back direction are provided in both the left frame and the right frame.

[0015] Preferably, the width of the vertical sliding channel is greater than the width of the landing door.

[0016] Preferably, one driving motor is provided in the power accommodating space of the top frame. The output shaft of the driving motor is connected to a first belt pulley. The first belt pulley is located above the left frame / right frame. The first belt pulley drives a second belt pulley through a synchronous belt. The second belt pulley is provided above the right frame / left frame.

[0017] Preferably, the transmission gear set includes three gears respectively provided in the left frame and the right frame and meshing with each other. The three gears are coaxially fixed to the three transmission screw rods on the same side respectively. One of the gears is coaxially driven with the belt pulley on the corresponding side. The transmission ratios between the three gears meshing with each other are different or the speed ratios of the connected transmission screw rods are different, so that the lifting speeds of the three landing doors are different.

[0018] Preferably, among the three gears, the middle gear is coaxially driven with the belt pulley on the corresponding side.

[0019] Preferably, the thread directions of the middle transmission screw rod and the adjacent two transmission screw rods are different, so as to realize synchronous lifting or synchronous lowering in the case of different rotations.

[0020] Preferably, among the three hall doors, the lifting speed ratio from the inside to the outside is 1:2:3.

[0021] Preferably, both ends of the hall door are fixed to each nut through bolts and connecting plates.

[0022] The utility model has substantial features and progress compared with the prior art. Specifically, the utility model has the following advantages:

[0023] This solution uses a transmission lead screw in cooperation with a nut to drive the three hall doors to run at different speeds, replacing the solution in the traditional scheme where the fast door and the slow door need to be linked by a steel wire rope or a chain. Essentially, the linkage mechanism between the fast door and the slow door is eliminated, and each hall door is driven to run by an independent drive mechanism, thereby effectively avoiding the safety hazard of fatigue fracture caused by the wear of the steel wire rope or the chain.

[0024] The power system in this solution uses a driving motor, a pulley, a synchronous belt, and a transmission gear set to achieve the synchronization of the left and right area transmission actions, and through the setting of the gear transmission ratio, the three doors are lifted or lowered at different speeds. Structurally, it avoids the complicated structure of using movable pulleys and static pulleys for the steel wire rope or the chain, simplifies the structure, and the transmission method is stable and durable, not easy to be damaged, meeting the requirements of durability and simple structure needed for the home environment.

[0025] The triple hall door structure is transferred from commercial elevators to home elevators, which significantly reduces the space occupation in terms of space, especially meeting the need to install elevators in narrow spaces in the width direction, saving the space for the home environment to the greatest extent. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 is an external view of a vertical lifting hall door of a screw triple-linkage home elevator in the utility model.

[0027] Figure 2 is a front sectional view of a vertical lifting hall door of a screw triple-linkage home elevator in the utility model.

[0028] Figure 3 is a side sectional view of a vertical lifting hall door of a screw triple-linkage home elevator in the utility model.

[0029] Figure 4 is an internal structure schematic diagram of a vertical lifting hall door of a screw triple-linkage home elevator in the utility model.

[0030] In the figure: 1. Hall door frame; 2. Driving motor; 3. Transmission gear set; 4. Lead screw transmission assembly; 11. Left frame; 12. Right frame; 13. Bottom frame; 14. Top frame; 15. Vertical slideway; 21. First pulley; 22. Synchronous belt; 23. Second pulley; 31. Centering gear; 32. Left gear; 33. Right gear; 41. Transmission lead screw; 42. Nut; 51. Shutter; 52. Middle door; 53. Slow door. Detailed implementation manner

[0031] The technical solution of the present utility model will be further described in detail below through specific implementation manners.

[0032] As Figures 1 - 4 shown, a lead screw triple-linkage household ladder vertical lifting hall door includes a hall door frame 1, a driving motor 2, a transmission gear set 3, three groups of lead screw transmission assemblies 4 and three hall doors.

[0033] The hall door frame 1 includes a left frame 11, a right frame 12, a bottom frame 13 and a top frame 14. The left frame 11, the right frame 12, the bottom frame 13 and the top frame 14 are sequentially assembled and connected together to form a door-shaped structure.

[0034] Three vertical and parallel vertical slideways 15 are respectively arranged on the inner sides of the left frame 11 and the right frame 12. A power accommodation space is arranged on the top frame 14 at the top of the hall door frame 1. The structures of the left frame 11 and the right frame 12 are symmetrical, and the three vertical slideways 15 are arranged in the front-back direction.

[0035] The three groups of lead screw transmission assemblies 4 include three pairs of transmission lead screws 41 and three pairs of nut sliders 42. The nut sliders 42 are in sliding fit with the transmission lead screws 41 one by one. The three pairs of transmission lead screws 41 are respectively installed in the three vertical slideways 15 of the left frame 11 and the right frame 12 in a pairwise opposite manner. Each nut 42 is in sliding fit with the installed vertical slideway 15. The top ends of the transmission lead screws 41 extend into the power accommodation space at the top of the hall door frame 1 for cooperation with the power mechanism.

[0036] The driving motor 2 and the transmission gear set 3 are installed in the power accommodation space at the top of the hall door frame. The driving motor 2 drives the three groups of lead screw transmission assemblies 4 to rotate at different speeds through the transmission gear set 3.

[0037] Specifically, in this embodiment, a driving motor 2 is arranged in the power accommodation space of the top frame. The output shaft of the driving motor 2 is connected to the first pulley 21. The first pulley 21 is located above the left frame / right frame. The first pulley 21 drives the second pulley 23 through the synchronous belt 22. The second pulley 23 is arranged above the right frame / left frame. The first pulley 21 and the second pulley 23 rotate synchronously.

[0038] The three hall doors are respectively a shutter 51, a middle door 52 and a slow door 53, which are installed between the hall door frames 1 in a staggered manner from front to back. Both ends of each hall door are respectively embedded in the vertical sliding grooves of the left frame 11 and the right frame 12 and fixedly connected to the nuts 42 in the matching sliding grooves. The connection method is by bolts and connecting plates. The width of the vertical sliding groove 15 is greater than the width of the hall door.

[0039] Specifically, in this embodiment, the transmission gear set 3 includes three gears meshing with each other respectively arranged in the left frame 11 and the right frame 12. The three gears are respectively coaxially fixed to three transmission lead screws on the same side. One of the gears is coaxially driven with the pulley on the corresponding side. In this embodiment, it is set as the middle gear 31. The middle gear 31 also meshes with the left gear 32 and the right gear 33 at the same time. The transmission ratios between the three meshing gears with each other are different or the speed ratios of the connected transmission lead screws are different, so that the lifting speeds of the three hall doors are different.

[0040] Since when the three gears mesh with each other, the rotation direction of the middle gear 31 is different from that of the left gear 32 and the right gear 33, the lead screw directions of the middle transmission lead screw and the adjacent two transmission lead screws are different, so as to realize synchronous lifting or synchronous lowering in the case of different rotation directions.

[0041] In this embodiment, among the three hall doors, the ratio of the lifting speeds from the inside to the outside is 1:2:3. Specifically in the drawings, the slow door is at the uppermost position with the slowest speed, the shutter is at the lowermost position with the fastest speed, and the middle door is at the middle position with the medium speed.

[0042] Working principle description:

[0043] Both ends of the shutter 51, the middle door 52 and the slow door 53 are respectively fixed to the nuts 42 in the respective vertical sliding grooves 15, so that the three doors form a stacked structure.

[0044] When the elevator door is closed, the shutter 51 is at the bottom, the middle door 52 is in the middle, and the slow door 53 is at the top.

[0045] When the elevator needs to be opened, the driving motor 2 is started, and the second pulley 23 is driven to rotate synchronously through the first pulley 21 and the synchronous belt 22.

[0046] The first pulley 21 and the second pulley 23 respectively drive the middle gears 31 in the transmission gear sets 3 at both ends to rotate synchronously.

[0047] The middle gear 31 meshes with the left gear 32 and the right gear 33 respectively, and then drives the left gear 32 and the right gear 33 to run at different speeds.

[0048] The three gears then drive the connected transmission lead screw 41 to rotate at different speeds, thereby driving the nut to rise at different speeds. Among them, the lifting speed ratio of the three doors from the inside out is 1:2:3. When the shutter 51 runs to the uppermost end, it mostly overlaps with the slow shutter 53 to achieve door opening.

[0049] When the elevator door is closed, reverse operation can be performed to drive the three doors to gradually return to their positions.

[0050] In other embodiments, the three meshing gears in the transmission gear set can rotate at the same speed, but the speeds of the connected lead screws are set differently, thereby realizing lifting execution with different speed ratios.

[0051] In another embodiment, if the three transmission lead screws have the same rotation direction, the transmission gear set can be set as a gearbox including more gears, so that the rotation directions of the output gears all face the same direction, which is easily achievable for those skilled in the art.

[0052] Finally, it should be noted that: The above has described the preferred embodiments of this patent in detail, but this patent is not limited to the above embodiments. Within the scope of knowledge possessed by those of ordinary skill in the art, various changes can be made without departing from the gist of this patent.

Claims

1. A screw rod three-link household ladder for vertically lifting a hall door, characterized in that: It includes a landing door frame, a driving motor, a transmission gear set, three sets of screw drive components and three landing doors; Three vertical slideways are respectively arranged vertically and parallel to each other on the inner sides of the left frame and the right frame of the hall door frame, and a power accommodation space is arranged at the top of the hall door frame; The three groups of screw drive assemblies include three pairs of drive screws and three pairs of nut sliders, the nut sliders are slidably matched with the drive screws one by one, the three pairs of drive screws are respectively installed in three vertical slideways of the left frame and the right frame in pairs, each nut is slidably matched with the installed vertical slideway, and the top end of the drive screw extends to the top end of the hall door frame; The driving motor and the transmission gear set are installed in the power accommodation space at the top of the hall door frame, and the driving motor drives the three sets of screw drive assemblies to rotate at different speeds through the transmission gear set; The three hall doors are installed between the hall door frames in a staggered manner in front and back, and the two ends of each hall door are respectively embedded in the vertical slideways of the left frame and the right frame and fixedly connected with the nut in the adapter slideway; The driving motor drives three sets of screw transmission components through the transmission gear set to drive the three hall doors to open or close the hall doors at different lifting speeds.

2. The screw rod three-link household ladder for vertically lifting the hall door according to claim 1 is characterized in that: The hall door frame comprises the left frame, the right frame, the bottom frame and the top frame, and the left frame, the right frame, the bottom frame and the top frame are sequentially assembled and connected together to form a door-type structure.

3. The screw rod three-link household ladder for vertically lifting the hall door according to claim 2 is characterized in that: The structures of the left frame and the right frame are symmetrical, and the left frame and the right frame are both provided with three vertical slideways which are arranged at equal intervals in the front-to-back direction.

4. The screw rod three-link household ladder for vertically lifting the hall door according to claim 3 is characterized in that: The width of the vertical slideway is greater than the width of the hall door.

5. The screw rod three-link household ladder for vertically lifting the hall door according to claim 4 is characterized in that: A driving motor is arranged in the power accommodation space of the top frame, and the output shaft of the driving motor is connected to a first pulley, which is located above the left frame / right frame. The first pulley drives a second pulley through a synchronous belt, and the second pulley is arranged above the right frame / left frame.

6. The screw rod three-link household ladder for vertically lifting the hall door according to claim 5 is characterized in that: The transmission gear set includes three gears meshing with each other and respectively arranged in the left frame and the right frame. The three gears are coaxially fixed with three transmission screws on the same side, one of the gears is coaxially transmitted with the pulley on the corresponding side, and the transmission ratios of the three meshing gears are different from each other or the speed ratios of the connected transmission screws are different, so that the lifting and lowering speeds of the three hall doors are different.

7. The screw rod three-link household ladder for vertically lifting the hall door according to claim 6 is characterized in that: Among the three gears, the middle gear is coaxially driven with the pulley on the corresponding side.

8. The screw rod three-link household ladder for vertically lifting the hall door according to claim 7 is characterized in that: The transmission screw in the middle position has a different thread rotation direction from the two adjacent transmission screws, so that synchronous lifting or synchronous lowering can be achieved under different rotation directions.

9. The screw rod three-link household ladder for vertically lifting the hall door according to claim 7, characterized in that: Among the three hall doors, the ratio of the lifting speed from inside to outside is 1:2:

3.

10. The screw rod three-link household ladder for vertically lifting the hall door according to claim 9, characterized in that: The two ends of the hall door are fixed to the nuts through bolts and connecting plates.

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