Eco-friendly lift for mobility disadvantaged persons with battery-based driving unit

Abstract

The present invention relates to an eco-friendly lift for the mobility-impaired equipped with a battery-based drive unit, and more specifically, to an electric lift that moves up and down in a screw-nut manner, wherein a battery, an electric motor, and a nut unit are installed on a platform and the nut unit is screw-coupled to a fixed screw, so that installation and construction in confined spaces are simple and maintenance costs are reduced, allowing the mobility-impaired to use the lift more easily.

Description

Technology Field

[0001] The present invention relates to an eco-friendly lift for the disabled equipped with a battery-based drive unit, and more specifically, to an electric lift installed to enable the disabled with mobility difficulties to use it more easily. Background Technology

[0002] Generally, vulnerable road users, such as the elderly and people with disabilities who have difficulty walking, experience significant inconvenience when moving between floors within their living spaces. In particular, in the case of detached houses or multi-story homes, indoor stairs are used as the primary means of transportation, so vulnerable road users are exposed to not only psychological burden but also physical risks while going up and down them. Since stairs have a specific slope and height due to their structure, falls can easily occur if one loses balance or missteps while moving; such accidents pose a problem that can lead to serious consequences, such as fractures or long-term mobility impairment, for the elderly.

[0003] Accordingly, a home lift installed within the home has been proposed to resolve the aforementioned problems. The home lift is configured with a structure that moves the lift car up and down using a power source, and is designed to allow users to board and move between floors. Conventional home lifts of this type are typically implemented to raise and lower the car lift by applying hydraulic or hoisting drive systems.

[0004] A small elevator for the disabled is disclosed in Korean Patent Publication No. 10-2210828 as a related technology. Referring to FIG. 1, the small elevator for the disabled comprises a frame (1), an elevator car (2), an elevator door (3), a chain gear (5), and a chain (6). At this time, one end of the chain (6) is fixed to the elevator car (2) and the other end is fixed to the piston rod of a hydraulic cylinder so that it is driven through a hydraulic method.

[0005] The hydraulic drive system described above utilizes hydraulic cylinders and pumps to drive lifting structures, including car lifts, and offers the advantages of high driving force and smooth operation. However, the hydraulic drive system has disadvantages, such as difficulty in precise control due to the possibility of hydraulic fluid leakage and viscosity changes caused by temperature fluctuations, as well as excessively high maintenance costs. Additionally, this method presents a problem where the noise and vibration from the hydraulic pump can cause discomfort to residents' living environments.

[0006] Meanwhile, the hoisting drive system is a type in which a wire is wound around a drum to lift a lifting body from the upper side, and it has the advantage of being easy to install due to its simple structure. However, the hoisting drive system has the disadvantage of requiring a large installation space because it requires the installation of a motor, a reduction gear, and a drum, and also requires periodic maintenance of the wire. In addition, this method has the problem of significant structural constraints because wire wear can lead to safety accidents, requiring a large number of wires and supporting structures to reinforce them in order to ensure safety. Prior art literature

[0007] (Patent Document 0001) US 12398630 B2 (Published Aug. 26, 2025)(Patent Document 0002) KR 10-2271450 B1 (Published June 25, 2021)(Patent Document 0003) KR 10-2210828 B1 (Published Feb. 2, 2021) The problem to be solved

[0008] The present invention was devised to solve the problems of the prior art, and the objective of the present invention is to provide an electric lift that can be more easily utilized by people with mobility impairments who have difficulty moving, by simplifying installation and construction in confined spaces and reducing maintenance costs. means of solving the problem

[0009] An electric lift (10) according to the present invention for achieving the above-described purpose comprises a structure (100) including a vertically extended elevator shaft (101), a platform (200) that moves up and down along the elevator shaft (101) of the structure (100), and a control panel (300) positioned at the rear of the platform (200) to control the movement of the platform (200). The platform (200) comprises a support body (200a) that supports a user and a rear body (200b) whose lower end is connected to the rear surface of the support body (200a) and extends upward. The platform (200) and the control panel (300) each include a nut part (240) and a screw (310). The nut part (240) rotates through a battery (210) and an electric motor (220) positioned on the rear body (200b), thereby causing the platform (200) to move up and down.

[0010] Additionally, the platform (200) includes a touch panel (201), a switch (202), and a side light (203) disposed on the front surface of the rear body (200b), and the switch (202) is connected to the battery (210) or the electric motor (220), so that when the switch (202) is pressed from the outside, the operation of the electric motor (220) is stopped, and the touch panel (201) and the switch (202) are installed at the left and right center of the rear body (200b), and a pair of side lights (203) that emit light forward can be disposed at the left and right ends of the rear body (200b), respectively.

[0011] Additionally, the platform (200) may further include a belt (230) that transmits the rotational force of the electric motor (220) to the nut portion (240).

[0012] Additionally, the platform (200) may further include a disc-shaped pulley (260) spaced apart from the upper side of the nut portion (240) and around which the end of the belt (230) is wound, and a fastening member (270) that fastens the pulley (260) and the nut portion (240) to each other.

[0013] Additionally, the nut portion (240) includes a driving nut (241) that is coupled to the fastening member (270) and rotates to convert rotational force into vertical linear motion through the inner surface and the outer surface of the screw (310), and a safety nut (242) that is coupled to one side of the upper and lower portion of the driving nut (241) and rotates together with the driving nut (241). With the rotation axis of the driving nut (241) extending vertically as the center, the inner radius of the driving nut (241) corresponds to the outer radius of the screw (310), and the inner radius of the safety nut (242) may be formed to be larger than the outer radius of the screw (310).

[0014] Additionally, the drive nut (241) includes an extension piece (241a) to which the fastening member (270) is coupled, and a cylindrical member (241b) extending upward from the extension piece (241a). The inner diameter of the extension piece (241a) and the inner diameter of the cylindrical member (241b) correspond to each other, and the outer diameter of the extension piece (241a) may be formed to be larger than the outer diameter of the cylindrical member (241b).

[0015] Additionally, the nut portion (240) may be arranged such that the outer radius of the cylindrical member (241b) and the outer radius of the safety nut (242) correspond to each other and are aligned in the vertical direction, with respect to the rotation axis of the vertically extended drive nut (241).

[0016] Additionally, the driving nut (241) further includes an alignment member (241c) formed on the upper surface of the cylindrical member (241b) and protruding upward, and the safety nut (242) may have a groove formed on its lower surface into which the alignment member (241c) is inserted.

[0017] Additionally, the alignment members (241c) are formed in plurality and spaced apart from each other along the circumference of the cylindrical member (241b), and the plurality of alignment members (241c) have different diameters, and the safety nut (242) may have a plurality of grooves formed that correspond to the diameters of the plurality of alignment members (241c).

[0018] Additionally, the nut portion (240) further includes a fixing cover (243) which is positioned to surround the cylindrical member (241b) and the safety nut (242) and whose lower surface is fixed to the upper surface of the extension piece (241a). The fixing cover (243) has an opening hole (243a) formed on its upper surface, which has an inner diameter narrower than the hollow in which the cylindrical member (241b) and the safety nut (42) are positioned, and the inner diameter of the opening hole (243a) may be formed to correspond to or be larger than the outer diameter of the screw (310).

[0019] Additionally, the battery (210) is connected to a solar panel to receive power produced by solar power generation, and an inverter and an MPPT (Maximum Power Point Tracking) controller may be installed between the battery (210) and the solar panel. Effects of the invention

[0020] The electric lift according to the present invention, configured as described above, provides the convenience of allowing users to easily move between upper and lower floors by enabling the platform to be raised along the hoistway of the structure by the driving force of an electric motor. In particular, by placing a control panel at the rear of the platform and driving it by rotating and connecting the screw and nut parts of the control panel, stable lifting is possible solely through electric driving without the need for a separate complex hydraulic device. This leads to the advantage of being easily installed on-site while reducing noise pollution generated by existing hydraulic devices.

[0021] In addition, the electric lift according to the present invention has the advantage of stably supporting the user through the support body and the rear body, while enabling independent operation using a battery and an electric motor placed in the rear body. In particular, the present invention has the advantage of improving user convenience and enhancing safety in emergency situations through a touch panel, switch, side light, etc. formed on the front of the rear body.

[0022] In addition, the electric lift according to the present invention has the advantage that the nut portion includes a drive nut and a safety nut, thereby preventing accidents caused by damage or detachment of the drive nut through the safety nut, and by having different inner diameters, it can prevent excessive power consumption due to friction during normal operation.

[0023] In addition, the electric lift according to the present invention has the advantage of making installation easier, as the drive nut and the safety nut can be inserted into the correct positions through the alignment member, and the screw threads formed on their inner surfaces are connected to each other. In particular, it has the advantage of allowing rapid assembly on-site by using multiple alignment members with different diameters, which leads to the effect of preventing performance degradation of the safety nut due to mismatched screw threads and power consumption caused by friction between the safety nut and the screw. Brief explanation of the drawing

[0024] FIG. 1 is a perspective view illustrating a small elevator for the disabled according to the prior art. FIG. 2 is a perspective view of an electric lift according to the present invention. FIGS. 3 and FIGS. 4 are plan views of an electric lift according to the present invention. FIG. 5 is a front view of a platform according to the present invention. FIG. 6 is a front view illustrating the interior of the rear body of a platform according to the present invention. FIG. 7 is a perspective view of a screw and nut portion according to the present invention. FIG. 8 is a cross-sectional view of a screw and nut portion according to the present invention. FIG. 9 is a cross-sectional view of a nut portion according to the present invention. FIG. 10 is a disassembled perspective view of a part of the nut portion according to the present invention. FIG. 11 is a perspective view of a driving nut according to the present invention. Specific details for implementing the invention

[0025] An electric lift according to the present invention will be described in detail below with reference to the attached drawings. The drawings presented below are provided as examples to ensure that the concept of the present invention is sufficiently conveyed to those skilled in the art. Accordingly, the present invention is not limited to the drawings presented below and may be embodied in other forms. In addition, throughout the specification, the same reference numerals indicate the same components.

[0026] Unless otherwise defined, technical and scientific terms used herein have the meanings commonly understood by those skilled in the art to which this invention pertains, and descriptions of known functions and configurations that could unnecessarily obscure the essence of the invention are omitted in the following description and accompanying drawings.

[0027] This specification clarifies the scope of the present invention and explains the principles of the present invention and discloses embodiments so that those skilled in the art can practice the present invention. The disclosed embodiments may be implemented in various forms and are not limited to the embodiments described herein.

[0028] Terms such as "comprising," "may compose," or "having," which may be used in various embodiments of the present invention, are intended to indicate the existence of the features described in the specification (e.g., functions, numbers, steps, actions, components, parts, or combinations thereof), and should be understood as not excluding in advance the existence or addition of one or more other features.

[0029] As used in this specification, singular expressions include plural expressions unless the context clearly indicates otherwise.

[0030] When it is stated that a component is "connected or coupled" to another component, it should be understood that the component may be directly connected or coupled to the other component, but that a new component may also exist between the component and the other component. On the other hand, when it is stated that a component is "directly connected" or "directly coupled" to another component, it should be understood that no new component exists between the component and the other component.

[0031] The terms "first," "second," etc., as used in this specification may be used to describe various components, but the components should not be limited by these terms. The terms are used solely for the purpose of distinguishing one component from another.

[0032] FIGS. 2 to 4 relate to an electric lift according to the present invention, where FIG. 2 shows a perspective view of the electric lift, and FIGS. 3 and 4 show plan views of the electric lift, respectively.

[0033] Referring to FIGS. 2 and 3, the electric lift (10) according to the present invention comprises a structure (100), a platform (200), and a control panel (300). In this case, the structure (100) is a vertically extended structure in which an elevator shaft (101) may be formed inside, and the platform (200) moves up and down along the elevator shaft (101). Here, the control panel (300) is installed on the rear side of the platform (200) to control the lifting of the platform (200).

[0034] The above structure (100) may be installed to allow a user to move to a plurality of floors and may include at least one door. In this case, the structure (100) may include a front door (110) installed on the front and a side door (120) installed on one side in the left and right directions. Additionally, the side door (120) of the structure (100) may be formed as a pair and installed on both sides in the left and right directions, and may consist of a first side door (121) and a second side door (122). The front door (110), the first side door (121), and / or the second side door (122) may be arranged in the same or different forms for each floor. For example, it can be implemented in a form where a front door (110) is installed on the 1st floor, and a front door (110) and a side door (120) are installed on the 2nd floor.

[0035] The above platform (200) may include a support body (200a) that supports a user and a rear body (200b) that is connected at the bottom of the rear surface of the support body (200a) and extends upward. At this time, a touch panel (201) that can be operated by a user by applying pressure may be formed on the front surface of the rear body (200b).

[0036] The touch panel (201) can implement the display function of the operation control panel. The touch panel (201) can also implement mode selection, eco drive, open hold function, customization function and / or intelligent function.

[0037] The above mode selection may change the operating form of the platform (200) and display it on the screen in the form of an avatar, thereby enabling more intuitive use. For example, Normal, Ninja, Kids, and / or Argo modes may be included. Normal mode indicates that the lights of the platform (200) are turned on and high-speed operation is performed, and a male or female avatar may be displayed on the screen. Ninja mode indicates that the lights are dimmed and operation is performed at a relatively slow speed, and Kids mode may display slow speed and colorful light effects. Additionally, Argo mode may display slow speed, lighting, and a simpler display interface.

[0038] The above Eco Drive can be displayed in the form of an icon and may indicate that the battery is being charged while moving. The above open-keeping function is a function that can keep the front door (110) and / or side door (120) open for a long time and can be utilized in various ways, such as unloading multiple items or maintaining a standby state.

[0039] The above customization function adjusts the color and brightness of the light output from the above rear body (200b) and records this as data related to each user's ID. After setting a floor name and adding a description, the icon and color and brightness data can be matched and recorded. In addition, the above intelligent function is a function that more intuitively outputs information such as whether there is an overload, emergency button release instructions, or whether the safety edge is pressed, and can be implemented to lock the device from unwanted use through functions such as 'parent lock'.

[0040] The front door (110), the first side door (121), and / or the second side door (122) can be implemented in various forms, preferably in the form of a hinged door. More preferably, the front door (110), the first side door (121), and / or the second side door (122) can be implemented as a double hinged door.

[0041] In order to install the structure (100) according to the present invention, a predetermined space must be secured indoors and outdoors, and the structure (100) has a drilling depth (B) in the front-rear direction. D ) with a drilling width (B) in the left and right directions W ) can have. And the elevator shaft (101) through which the platform (200) is raised and lowered has an elevator shaft depth (H) in the front and rear directions. D ) having elevator shaft width (H) in the left and right directions W ) can have. In addition, the support body (200a) of the platform (200) may have a platform depth (P) in the front-rear direction. D ) having platform width (P) in the left and right directions W It may include ). In addition, the front door (110) of the double-hinged type may include a first door width (D) in the left-right direction. W1 Having ), the side door (120) of the double-hinged type has a second door width (D) in the front-rear direction. W2 It can be implemented to have ).

[0042] The electric lift (10) according to the present invention can provide various sizes depending on the space given in the environment in which it is installed, and, for example, can be provided in sizes such as S, M, L, XL.

[0043] The S size of the electric lift (10) according to the present invention can be implemented as a 3-person lift with a rated load of 250 kg. At this time, the hole drilling dimension, the drilling width (B), is W ) and drilling depth (B D ) can be implemented as approximately 940mm and 1425mm, respectively. And the floor size, the platform width (P W ) and platform depth (PD ) can be implemented as approximately 830mm and 1000mm, respectively. In addition, the above-mentioned elevator shaft width (H W ) is approximately 880mm, and the above elevator shaft depth (H D ) can be implemented as approximately 1365mm. In addition, the first door width (D) of the front door (110) W1 ) is approximately 760mm, and the second door width (D) of the side door (120) is W2 ) can be implemented within approximately 800mm. Here, the side door (120) may have a door frame, and the width (D) of the door frame F ) can have a length of approximately 950mm in the front-rear direction.

[0044] The M size of the electric lift (10) according to the present invention can be implemented as a 3-person lift with a rated load of 250 kg. At this time, the hole drilling dimension, the drilling width (B) W ) and drilling depth (B D ) can be implemented as approximately 940mm and 1525mm, respectively. And the floor size, the platform width (P W ) and platform depth (P D ) can be implemented as approximately 830mm and 1100mm, respectively. In addition, the above elevator shaft width (H W ) is approximately 880mm, and the above elevator shaft depth (H D ) can be implemented as approximately 1465mm. In addition, the first door width (D) of the front door (110) W1 ) is approximately 760mm, and the second door width (D) of the side door (120) is W2 ) can be implemented within approximately 800mm. Here, the side door (120) may have a door frame, and the width (D) of the door frame F ) can have a length of approximately 950mm in the front-rear direction.

[0045] The L size of the electric lift (10) according to the present invention can be implemented as a 5-person capacity with a rated load of 400 kg. At this time, the hole drilling dimension, the drilling width (B), is W) and drilling depth (B D ) can be implemented as approximately 1310mm and 1425mm, respectively. And the floor size, the platform width (P W ) and platform depth (P D ) can be implemented as approximately 1200mm and 1000mm, respectively. In addition, the above elevator shaft width (H W ) is approximately 1250mm, and the above elevator shaft depth (H D ) can be implemented as approximately 1365mm. In addition, the first door width (D) of the front door (110) W1 ) is approximately 800mm, and the second door width (D) of the side door (120) is W2 ) can be implemented within approximately 800mm. Here, the front door (110) and the side door (120) may each have a door frame, and the width (D) of the door frame F ) can have a length of about 950mm.

[0046] The XL size of the electric lift (10) according to the present invention can be implemented as a 5-person capacity with a rated load of 400 kg. At this time, the hole drilling dimension, the drilling width (B) W ) and drilling depth (B D ) can be implemented as approximately 1510mm and 1525mm, respectively. And the floor size, the platform width (P W ) and platform depth (P D ) can be implemented as approximately 1400mm and 1100mm, respectively. In addition, the above elevator shaft width (H W ) is approximately 1450mm, and the above elevator shaft depth (H D ) can be implemented as approximately 1465mm. In addition, the first door width (D) of the front door (110) W1 ) is approximately 800mm, and the second door width (D) of the side door (120) is W2 ) can be implemented within approximately 800mm. Here, the front door (110) and the side door (120) may each have a door frame, and the width (D) of the door frame F) can have a length of about 950mm.

[0047] The electric lift (10) according to the present invention can be implemented in a form that ascends and descends over two or more floors, for example, and more preferably, can be implemented with 2 to 6 floors. At this time, the total floor area can be formed between 250 mm and 15,000 mm, and the top height can be formed between 2,275 mm and 3,500 mm. The speed can be implemented at a maximum of 0.15 m / s and can be installed to operate at a maximum of 0.3 m / s depending on the option. In addition, one or more front doors (110) or side doors (120) are installed per floor and are implemented as double glass doors, and the walls of the elevator shaft (101) can be implemented with laminated transparent glass of about 10 mm or steel plates of about 10 mm.

[0048] FIGS. 5 to 7 relate to an electric lift according to the present invention, where FIG. 5 shows a front view of a platform, FIG. 6 shows a front view illustrating the interior of the rear body of the platform, and FIG. 7 shows a perspective view of a screw and nut part.

[0049] Referring to FIG. 5, the platform (200) may include a touch panel (201), a switch (202), and a side light (203) disposed on the front surface of the rear body (200b). In this case, the touch panel (201) and the switch (202) may be installed at the left and right center of the rear body (200b), and a pair of side lights (203) that emit light forward may be disposed at the left and right ends of the rear body (200b), respectively.

[0050] The above switch (202) may be implemented with an emergency stop function or an alarm function. In this case, the above switch (202) may be implemented in multiple numbers, each including an individual switch (202) having an emergency stop function and an alarm function. The above emergency stop function is a function in which the above switch (202) controls the battery (210) or electric motor (220) described later through a processor, and can be implemented so that the platform (200) stops immediately when pressurized in an emergency situation. The above alarm function is a function in which, when the switch (202) is pressed for a predetermined period of time, it connects to an external server through a pre-set network, and, for example, can be implemented so that it automatically communicates to a pre-set phone number when pressed for 10 seconds.

[0051] The above-mentioned rear body (200b) can be implemented through various colors and designs to further expand the user's visual boundaries. For example, it can be implemented as ArtWall Electric Opal, Stockholm Grid, Oriental White, Perching Bird, Bamboo Dreams, INK Bronze & INK Blue, Personalize Lighting, etc. The above-mentioned support body (200a) can also be fitted with carpets such as Denim Blue, Denim Stripe, Stitch Black, Green Stitch, and Linen Gray.

[0052] Referring to FIG. 6, the platform (200) may include a battery (210), an electric motor (220), a belt (230), and a nut part (240) installed on the rear body (200b). At this time, the control panel (300) may include a screw (310) extending vertically, and the nut part (240) of the platform (200) and the screw (310) may be screw-coupled to each other. When rotational force is generated from the electric motor (220) by the power of the battery (210), the nut part (240) may receive rotational force through the belt (230) and rotate. Furthermore, the rotational motion of the nut part (240) and the screw (310) can be converted into vertical linear motion in a screw-nut manner, and the platform (200) can be raised and lowered through the converted force. Here, the battery can be charged in an eco-drive type during descent through dynamic charging, and can also be charged by connecting to a separate solar panel, etc.

[0053] The battery (210) may be connected to a solar panel to receive power produced by solar power generation. At this time, an inverter and / or MPPT (Maximum Power Point Tracking) controller, etc., may be installed between the battery (210) and the solar panel. The solar panel may be implemented with various specifications, for example, a single panel with 610W or a plurality of two or more panels may be implemented. The inverter may be implemented with a specification of approximately 48V 5,000W, and the MPPT controller may be implemented with a specification of approximately 60A. At this time, the battery may have a specification of approximately 24V 160A and may be implemented with a material such as iron phosphate.

[0054] The platform (200) may further include a brake (250) and / or a pulley (260). In this case, the nut portion (240), the brake (250), and the pulley (260) may be arranged vertically relative to each other along the longitudinal direction of the screw (310). More preferably, the pulley (260) may be positioned above the nut portion (240), and the brake (250) may be positioned above the pulley (260).

[0055] The above brake (250) may be installed as a safety brake type to ensure user safety through a dual safety brake, etc. Additionally, the above pulley (260) may be connected to the output shaft of the above electric motor (220) via a belt (230), and the pulley (260) and the above nut part (240) may be connected to each other and rotate together. Accordingly, the rotational force generated from the output shaft of the above electric motor (220) can be transmitted to the above nut part (240) through the belt (230) and the pulley (260).

[0056] Referring to FIG. 7, the platform (200) may further include a fastening member (270) that fastens the pulley (260) and the nut portion (240) to each other. In this case, a plurality of fastening members (270) may be arranged in the circumferential direction of the nut portion (240). The fastening member (270) may be implemented with various fastening means such as screws and bolts.

[0057] FIGS. 8 to 11 relate to an electric lift according to the present invention, where FIG. 8 shows a front cross-sectional view of a screw and a nut portion, and FIG. 9 shows a front cross-sectional view of a nut portion. Additionally, FIG. 10 shows a perspective view with a part of the nut portion exploded, and FIG. 11 shows a perspective view of a driving nut.

[0058] Referring to FIG. 8, the nut portion (240) may include a drive nut (241) and a safety nut (242). In this case, the drive nut (241) may be coupled to the pulley (260) and the fastening member (270) to receive rotational force. The safety nut (242) may be directly coupled to the drive nut (241) or connected through other parts to rotate together. Here, the drive nut (241) and the safety nut (242) may be arranged in an up-and-down direction, and screw threads capable of engaging with the screw (310) may be formed on their respective inner surfaces. Additionally, it may be preferable for the screw threads formed on the inner surface of the drive nut (241) and the inner surface of the safety nut (242) to be connected to each other. Additionally, an outwardly extended extension piece (241a) may be formed on the lower part of the drive nut (241), and the fastening member (270) may be inserted through the extension piece (241a).

[0059] The nut portion (240) may further include a fixing cover (243) positioned to surround the upper part of the driving nut (241) and the safety nut (242), with the lower surface fixed to the upper surface of the extension piece (241a). In this case, the upper part of the driving nut (241) and the safety nut (242) may have corresponding outer diameters, and the fixing cover (243) may have a hollow formed with a corresponding inner diameter to support each.

[0060] The screw (310) may have an outer surface with a predetermined radius based on the rotation axis (O) of the drive nut (241). At this time, depending on the screw thread machining, the screw (310) may have a first minimum radius (R 11 ) and the first maximum radius (R 12 Can have ).

[0061] Referring to FIG. 9, the inner surface of the drive nut (241) may have a predetermined radius with respect to the rotation axis (O) of the drive nut (241). At this time, depending on the screw thread machining, the drive nut (241) has a first minimum inner diameter (R 21) and the first maximum inner diameter (R 22 It can have ). Here, the first minimum outer diameter (R) of the screw (310) and the drive nut (241) 11 ) and the first minimum inner diameter (R 21 ) are identical to each other, and the first maximum outer diameter (R 12 ) and the first minimum inner diameter (R 22 ) can be identical to each other.

[0062] The safety nut (242) may have an inner surface with a predetermined radius based on the rotation axis (O) of the drive nut (241). At this time, depending on the screw thread machining, the safety nut (242) may have a second minimum inner diameter (R 31 ) and the second maximum inner diameter (R 32 It can have ). Here, the second minimum inner diameter (R) of the safety nut (242) 31 ) is the first minimum outer diameter (R) of the screw (310) and the drive nut (241). 11 ) and the first minimum inner diameter (R 21 Larger than ) and the second maximum inner diameter (R) of the safety nut (242) 32 ) is the first maximum outer diameter (R) of the screw (310) and the drive nut (241). 12 ) and the first minimum inner diameter (R 22 It can be formed to be larger than ). At this time, the second minimum inner diameter (R) of the safety nut (242) 31 ) is the first maximum outer diameter (R) of the screw (310) and the drive nut (241). 12 ) and the first minimum inner diameter (R 22 It can be formed to be smaller than ). Here, having the same radius or diameter is defined as having corresponding dimensions according to the design considering the actual clearance.

[0063] The above fixed cover (243) may have an opening hole (243a) formed on its upper surface, having an inner diameter narrower than the hollow where the upper part of the drive nut (241) and the safety nut (242) are positioned. At this time, the radius (R4) of the opening hole is based on the rotation axis (O) of the drive nut (241), and is the first maximum outer diameter (R) of the screw (310). 12It can be formed to be the same as or larger than ).

[0064] Referring to FIG. 10, the safety nut (242) can be implemented as an ellipse in which the major axis and the minor axis are orthogonal to each other. Accordingly, the second minimum inner diameter (R) of the safety nut (242) 31 ) is the short axis inner diameter (R 31a ) and major axis inner diameter (R 31b It can have ). At this time, the long axis inner diameter (R) of the safety nut (242) 31b ) is the short axis inner diameter (R 31a It is formed to be larger than ), and the short inner diameter (R) of the safety nut (242) 31a ) is the screw (310) of the drive nut (241) and the first minimum outer diameter (R) of the drive nut (241). 11 ) and the first minimum inner diameter (R 21 It can be formed to be identical to ). Accordingly, as the driving nut (241) and the safety nut (242) rotate together, the safety nut (242) may intermittently make point contact with the screw (310), and in the event that the posture of the platform (200) is twisted due to excessive vibration or speed, the frictional force with the safety nut (242) is increased so that vibration is reduced and speed is lowered, thereby being physically controlled.

[0065] The above drive nut (241) may be configured to include an extension piece (241a) formed at the bottom to which the fastening member (270) is coupled, and a cylindrical member (241b) formed at the top and extending upward from the extension piece (241a). In this case, the outer diameter of the extension piece (241a) may be formed to be larger than the outer diameter of the cylindrical member (241b), and the inner diameter of the extension piece (241a) and the inner diameter of the cylindrical member (241b) may be the same.

[0066] The above drive nut (241) may further include an alignment member (241c) formed on the upper surface of the cylindrical member (241b) and protruding upward. At this time, a groove recessed upward may be formed on the lower surface of the safety nut (242) to allow the alignment member (241c) to be inserted, and the alignment member (241c) and the groove of the safety nut (242) may be implemented in a shape that corresponds to each other.

[0067] Referring to FIG. 11, the alignment members (241c) may be formed in multiple numbers and spaced apart from each other along the circumferential direction of the drive nut (241). At this time, the multiple alignment members (241c) may have different diameters, and the first outer diameter (D1) of one alignment member (241c) may be formed to be smaller than the second outer diameter (D2) of another alignment member (241c). Additionally, the grooves of the safety nut (242) may also be formed in multiple numbers, and each of the multiple grooves may have an area corresponding to the multiple alignment members (241c) to guide mutual coupling. This allows for assembly in a form where the threads machined on the drive nut (241) and the safety nut (242) can be connected to each other, thereby minimizing frictional force generated during normal operation and leading to the effect that the safety nut (242) can be physically operated during abnormal operation.

[0068] The background technology of the present invention described above is technical information possessed for the derivation of the present invention or acquired during the process of deriving the present invention, and cannot necessarily be regarded as known technology disclosed to the general public prior to the filing of the present invention.

[0069] The foregoing description of the present invention is for illustrative purposes only, and those skilled in the art will understand that other specific forms can be easily modified without altering the technical spirit or essential features of the present invention. Therefore, the embodiments described above should be understood as illustrative in all respects and not intended to be limiting.

[0070] For example, the present invention has been described with reference to embodiments illustrated in the drawings, but this is merely illustrative and those skilled in the art will understand that various modifications and variations of embodiments are possible therefrom.

[0071] Accordingly, the true technical scope of protection of the present invention is defined by the technical concept of the claims, and all modifications or variations derived from the meaning and scope of the claims and equivalent concepts thereof should be interpreted as being included within the scope of the present invention. Explanation of the symbols

[0072] 10: Electric Lift 100 : Structure 101 : Elevator shaft 110 : Front door 120 : Side door 121 : First side door 122 : Second side door 200 : Platform 200a : Support 200b : Rear body 201 : Touch panel 202 : Switch 203 : Sidelight 210 : Battery 220 : Electric motor 230 : Belt 240 : Nut part 241 : Drive nut 241a : Extension 241b : Cylindrical member 241c : Alignment member 242 : Safety nut 243 : Fixed cover 243a : opening hole 250 : Brake 260 : Pulley 270 : Fastening member 300 : Control panel 310 : Screw

Claims

Claim 1 A structure including a vertically extended elevator shaft; a platform that moves up and down along the elevator shaft of the structure; and a control panel disposed at the rear of the platform to control the movement of the platform; wherein the platform includes a support body that supports a user; and a rear body whose lower end is connected to the rear surface of the support body and extends upward; wherein the platform and the control panel each include a nut part and a screw, and the platform moves up and down by rotating the nut part through a battery and an electric motor disposed in the rear body; wherein the platform includes a belt that transmits the rotational force of the electric motor; a disc-shaped pulley spaced apart above the nut part and around which the end of the belt is wound; and a fastening member that fastens the pulley and the nut part together; wherein the nut part is a drive nut that rotates in conjunction with the fastening member and converts rotational force into vertical linear motion through its inner surface and the outer surface of the screw. and a safety nut coupled to one side of the upper and lower portions of the driving nut and rotating together with the driving nut; wherein, with respect to the rotation axis of the driving nut extending vertically, the inner radius of the driving nut corresponds to the outer radius of the screw, and the inner radius of the safety nut is larger than the outer radius of the screw, and the driving nut comprises an extension piece to which the fastening member is coupled; and a cylindrical member extending upward from the extension member; wherein the inner diameter of the extension member and the inner diameter of the cylindrical member correspond to each other, and the outer diameter of the extension member is formed to be larger than the outer diameter of the cylindrical member, and the nut portion is arranged so as to be parallel in the vertical direction with the outer radius of the cylindrical member and the outer radius of the safety nut corresponding to each other around the rotation axis of the drive nut extending vertically, and the nut portion further includes a fixing cover arranged to surround the cylindrical member and the safety nut, the lower surface of which is fixed to the upper surface of the extension member; wherein the fixing cover has an opening hole formed on its upper surface having an inner diameter narrower than the hollow in which the cylindrical member and the safety nut are arranged, and the inner diameter of the opening hole corresponds to or is larger than the outer diameter of the screw, and the drive nut is an alignment member formed on the upper surface of the cylindrical member and protruding upward;An electric lift further comprising, wherein the alignment members are formed in plurality and spaced apart from each other along the circumferential direction of the cylindrical member, and the plurality of alignment members are formed having different diameters such that the outer diameter of one alignment member is smaller than the outer diameter of another alignment member, and the safety nut has a plurality of grooves formed on its lower surface into which the alignment members are inserted, and each of the plurality of grooves has an area corresponding to the plurality of alignment members to guide mutual coupling so that the screw threads machined on the driving nut and the safety nut are connected to each other, and the safety nut is implemented in a hollow ellipse in which the major axis and the minor axis are orthogonal to each other so that the safety nut makes point contact with the screw during the process in which the driving nut and the safety nut rotate together, and the inner diameter of the major axis of the safety nut is larger than the inner diameter of the minor axis, and the inner diameter of the minor axis of the safety nut is the same as the inner diameter of the driving nut. Claim 2 An electric lift according to claim 1, wherein the platform comprises a touch panel, a switch, and a side light disposed on the front surface of the rear body, and the switch is connected to the battery or electric motor, so that when the switch is pressed from the outside, the operation of the electric motor is stopped, the touch panel and the switch are installed at the left and right center of the rear body, and a pair of side lights emitting light forward are disposed at the left and right ends of the rear body, respectively. Claim 3 delete Claim 4 delete Claim 5 delete Claim 6 delete Claim 7 delete Claim 8 delete Claim 9 delete Claim 10 delete Claim 11 An electric lift according to claim 1, characterized in that the battery is connected to a solar panel to receive power produced by solar power generation, and an inverter and an MPPT (Maximum Power Point Tracking) controller are installed between the battery and the solar panel.

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