RU173944U1 - VERTICAL LIFT FOR DISABLED PEOPLE - Google Patents

Abstract

The utility model relates to hoisting and transport machinery, in particular, passenger lifts, and can be used in hospitals, residential buildings, museums, sports facilities, shops and other facilities for transporting disabled people with wheelchairs and other persons with disabilities. The lift contains a base , with vertical guides rigidly attached to it, on which a movable platform is installed through the carriage. The platform is equipped with a spatial frame, on the horizontal racks of which are installed, with the possibility of rotation around the axis, safety barriers. To enter and exit the platform, on its free side opposite the ramp, a movable section is installed, made in the form of a tiltable ramp (see Fig. 1). Based on the bottom side of the platform, an actuating control mechanism for synchronously controlling the tiltable ramp and the lowering safety barrier is installed .The vertical lifting mechanism consists of a working hydraulic cylinder, a traction chain, a foot drive hydraulic pump, a two-cylinder manual drive hydraulic pump, and a hydraulic power station with an electric drive m and control unit electro-hydraulic drive. A roller is installed in the upper part of the hydraulic cylinder through which the traction chain is passed. One end of the traction chain is fixed on a fixed base, the second end is rigidly connected to the carriage supporting the movable platform. The working hydraulic cylinder is equipped with a throttling valve, a hydraulic system servicing unit combined with a hydraulic valve for changing the platform’s direction of movement (see Fig. 1 and Fig. 2). The technical result from using all the essential features of the claimed utility model is to realize the purpose of the lift - moving people with limited ability in the vertical direction, avoiding the difficulties of lifting a wheelchair with a person.

Description

The utility model relates to hoisting and transport machinery, in particular, passenger lifts, and can be used in hospitals, residential buildings, museums, sports facilities, shops and other facilities for transporting disabled people with wheelchairs and other persons with disabilities.

Known lifting device for wheelchairs. The device contains two vertical racks pivotally connected to the platform, on the two end sides of which the hinged panels are fixed. The platform lifting drive comprises a power cylinder kinematically connected to the uprights by means of levers. Each drive of turning panels alternately includes a cam rigidly fixed to the corresponding lever, a pusher mounted on a vertical strut with the possibility of interaction with the cam and connected by flexible coupling to the corresponding platform panel (see AS USSR 1789482 IPC V66V 9/04, B66F 7 / 08, 1993)

The disadvantages of the known device are: the complexity of the manufacturing technology and installation of the lift, insufficient safety and ease of use, as well as the bulkiness of the lift. In addition, there is no mode of independent (manual) lifting of the platform by an assistant or a person with limited mobility. This device can only be used as an additional device to motor vehicles.

Known lift for the disabled. The elevator comprises a housing with a supporting element mounted on the wall of the car, and a lifting platform connected to the housing with a drive for its vertical movement relative to the housing and with a safety barrier made in the form of folding ramps mounted from the ends of the platform and restrictive handrails. The housing with the supporting platform is pivotally connected to the supporting element and has the ability to rotate in the horizontal plane both together with the supporting element relative to the wall of the car from the transport position to the intermediate and vice versa, and fixing them in these positions. The lifting platform is made in the form of two telescopic sliding platforms and has an electric motor as a vertical displacement drive, and the safety barrier restraints are pivotally connected to the platform with the possibility of rotation and fixing in the required position (see RF patent No. 17039 IPC 7 B66F 7/24, B60P 1/44, 2001).

A disadvantage of the known lift is the design complexity, as well as the narrow target use only in trains.

Known vertical lift for the disabled. The wheelchair lift includes a platform, between the ground and an elevated position along the mast. The movable section is fully retracted before the platform moves to the ground.

The device includes: a vertically movable walk-through platform with a horizontally extendable section. The platform is mounted on a slide for vertical movement along a vertical mast through the use of a linear actuator lifting mechanism. The platform includes an upper main section and a lower movable section made with the possibility of extension in the horizontal direction using the linear actuator of the platform. The drives are interconnected and controlled by a power system to selectively control the movement of the platform so that the platform rises to the desired height and the movable section extends. The device includes a source of fluid under pressure (or a hydraulic power plant) in which the drive means include first and second control valves. When depressurizing the hydraulic drive system, frictional braking is provided (see US patent No. 5553990 A, IPC 7 B66B 9/04; B66B 9/08; B66F 7/04, 1996). This decision was made as a prototype.

A disadvantage of the known lift are:

- large dimensions

- the complexity of the design, due to the presence of a large number of elements,

- low operational capabilities, as it is impossible to operate the device without connecting to a power source, there is no mode of independent (manual) lifting and extension of the platform by an assistant or a person with limited mobility;

- insufficient safety of operation, as there are no automatic blocking devices at the input and output (pos. 243, 244, 64, 66) fig 1; due to the significant mass of the lift and the change in the center of mass during operation, it is necessary to equip a special foundation fig 5; during depressurization of the hydraulic system, even if frictional braking works, it is not possible to safely lower the platform before repairing the hydraulic system.

The technical problem solved by the utility model is the expansion of the arsenal of technical equipment designed for the vertical raising and lowering of wheelchair users and people with disabilities.

The technical result consists in the implementation of this purpose.

The problem is solved due to the fact that in the well-known vertical lift for people with disabilities, containing vertical guides with a movable walk-through platform mounted on them with movable safety barriers, a vertical platform lift mechanism mounted on the base of the guides and including a working hydraulic cylinder, a hydraulic station with electric drive and drive control unit, in accordance with a utility model, the lift is equipped with a foot drive hydraulic pump and a two-cylinder ndrovym hydraulic pump manual actuator, controlled by mechanical motion control assembly platform mounted on the platform foldable ramp, and vertical lifting mechanism further includes a traction chain that connects the movable carriage with fixed on it and a work platform cylinder.

The working hydraulic cylinder is equipped with a throttle valve.

The mechanical control unit for moving the platform consists of a 3-position lever mechanically connected with a foot drive hydraulic pump valve and a hand-drive double-cylinder hydraulic pump valve, as well as a 2-position manual directional switch.

The technical result from the use of all the essential features of the claimed utility model consists in the implementation by the lift of its purpose - the movement of persons with disabilities in the vertical direction, avoiding the difficulties of lifting a wheelchair with a person.

At the same time, the claimed device has several advantages.

The implementation of the working hydraulic cylinder with a throttle valve allows for a smooth lowering of the platform even in the event of a depressurization of the system or a failure of the electric hydraulic drive.

The implementation of the reclining ramp allows you to simplify the design.

The presence of a foot drive hydraulic pump and a two-cylinder manual drive hydraulic pump, controlled by a mechanical platform movement control unit, allows the algorithm to operate the lift in 3 modes:

- Implementation of lifting the platform from the “O” mark by an assistant to a person with reduced mobility using a foot hydraulic pump and a manual switching unit for the direction of movement.

- Implementation of independent lifting of the platform by a person with limited mobility using a two-cylinder manual hydraulic pump.

- Implementation of independent lifting of the platform by a person with limited mobility using an automatic electric hydraulic drive system.

The presence of a mechanical unit for controlling the movement of the platform allows lifting and lowering the platform of the elevator, including allowing the lowering of the platform in the absence (disconnection) of the supply voltage.

The essence of the utility model is illustrated by drawings, which depict:

- FIG. 1 - view of the vertical lift (assembly drawing);

- FIG. 2 - hydraulic diagram of a vertical elevator;

- FIG. 3 - kinematic diagram of the actuator;

The vertical lift for people with disabilities (Fig. 1) consists of two main parts:

- a lifting device with a drive;

- a load-carrying platform with an actuator of reclining ramps and a safety barrier.

The elevator comprises a base 1 with which vertical guides 2 are rigidly connected, on which a movable platform 4 is mounted through the carriage 3. The platform 4 is provided with a spatial frame 5, on the horizontal posts of which are installed, with the possibility of rotation around the axis, security barriers 6 and 7. For entry and exit to the platform 4 on its free side opposite the ramp, a tiltable ramp 8 is installed. Depending on the embodiment, the ramp 8 is installed on the right or left side of the platform. (see Fig. 1).

Based on the bottom side of the platform 4, an actuating mechanism is installed for synchronously controlling the reclining ramp 8 and the lowering safety barrier 6. The actuating mechanism for controlling the movable sections is made in the form of a link 9 connected by a cable drive 10 with a lever 12 and a cable drive 11 connected to the ramp 8 and safety barrier 6 (see Fig. 3).

The vertical lifting mechanism consists of a working hydraulic cylinder 13, a traction chain 14, a hydraulic pump for a foot drive 15, a two-cylinder hydraulic pump for a manual drive 16, a hydraulic station with an electric actuator 17 and a control unit for an electric hydraulic actuator 18 and a block of electromagnetic valves 19. A working hydraulic cylinder 13 is mounted on the base 1 between the vertical rails 2. In the upper part of the hydraulic cylinder 13 there is a roller 20 through which the traction chain 14 is passed. One end of the traction chain 14 is mounted on a fixed base 1, w The other end is rigidly connected to the carriage 3 supporting the movable platform 4. Due to this connection of the hydraulic cylinder to the platform, its reliable operation is ensured.

The vertical lifting mechanism comprises a mechanical 3-position control lever 21 mounted on the right vertical guide 2 of the platform 21 mechanically connected to the foot drive hydraulic pump valve 15 and the manual drive 16-cylinder hydraulic pump valve (Fig. 2). The working hydraulic cylinder 13 is equipped with a throttling valve 22, a service unit for the hydraulic system 23 combined with a hydraulic valve 24 changing the direction of movement of the platform. A manual switch for controlling the direction of movement 25 mounted on the frame 5 is connected to the service system of the hydraulic cylinder 13 (see Fig. 1 and Fig. 2).

The use of a combined electric hydraulic drive made it possible to implement the lift operation algorithm in 3 modes:

- The implementation of the lifting platform 4 from the “0” assistant person with reduced mobility using a hydraulic pump foot drive 15 The choice of direction of movement is carried out using a mechanical 3-position control lever 21.

- Implementation of independent lifting of the platform by a person with limited mobility using the lever 26 of the drive of the two-cylinder hydraulic pump 16. The choice of the direction of movement is carried out using a mechanical 2-position control lever 25.

- Implementation of independent lifting of the platform by a person with limited mobility using an automatic electrohydraulic drive system 17, 18.

The safe descent of the platform 4, in the absence of supply voltage, is provided both by the person with limited mobility by means of a mechanical 2-position control lever 25 and by his assistant using a mechanical 3-position control lever 21 mounted on the right vertical rail 2.

The actuator control mechanism of the ramp 8, made in the form of a curtain 9, connected by a cable drive 10, 11 with the ramp 8 and the safety barrier 6, allows you to synchronously raise or lower these elements. When the movable platform 4 is at the “0” mark, the lowered ramp 8 allows easy entry and exit from the platform. When the platform 4 moves up or down, the ramp 8 is raised, and the safety barriers 6 and 7 are lowered, which ensures the protective function of the lift. The locking of the ramp 8 in the raised and the safety barrier 6 in the lowered state is carried out by changing the position of the wings 9 connected by a cable drive 10, 11 with the ramp 8 and the safety barrier 6 (Fig. 3). When the platform reaches a predetermined height, the lever 27 mounted on the safety barrier 7 interacts with a roller stop 28 mounted on the vertical guide of the elevator 2 (Fig. 1, Fig. 3). Fixed roller limiter 28 acts on the lever 27, as a result, the safety barrier 7 rises, which allows you to freely leave the platform 4. Moving the platform is accompanied by an audio or light signal.

Device operation:

After entering the lift, an assistant or a person with reduced mobility actuates the elements of the vertical lifting mechanism. First, a mechanical 3-position control lever 21 is installed in the required position. A direction of movement is selected using the manual direction switch 25.

If the assistant performs the lift, the lift drive is provided by rhythmic pressing the pedal 29 located on the base 1, due to which the foot pump 15 hydraulic pump is activated, hydraulically connected to the hydraulic cylinder 13.

The platform 4, rising, drives the link 9, connected by a cable drive 10, 11 with the ramp 8 and the safety barrier 6. As a result, the ramp is lifted and locked in the raised state by means of the link 9 and the rope drive, and the safety barrier 6 is lowered, ensuring safe lifting . When the platform reaches a predetermined height, the lever 27 mounted on the safety barrier 7 interacts with a roller limiter 28 mounted on the vertical guide of the elevator 2 (Fig. 1, Fig. 1). Fixed roller limiter acts on the lever 27, as a result, the safety barrier 7 rises, which allows you to freely leave the platform 4.

At the end of the use of the platform, the mechanical 3-position control lever 21 automatically comes to the neutral position, which enables the platform to be raised or lowered using an automatic electric hydraulic drive system.

When lifting by a person with reduced mobility without an assistant, one of two options can be chosen:

- Implementation of independent lifting of the platform by a person with disabilities using an automatic electrohydraulic drive system: a hydraulic station with an electric drive 17, an electrohydraulic actuator control unit 18 and an electromagnetic valve block 19.

The choice of direction of movement is carried out using the control unit of the electric actuator 18.

- the drive by activating the swinging lever of the manual drive 26, which acts on the two-cylinder hydraulic pump of the manual drive 16, hydraulically connected to the hydraulic cylinder 13.

The choice of the direction of movement is carried out using a manual switch of the direction of movement 25.

The layout of the lift is designed in such a way that allows for quick installation and dismantling of the device, as well as changing the configuration of the equipment in accordance with customer requirements.

The elevator easily moves at the expense of the wheels fixed on the basis. In the working position, the wheels are replaced with adjustable supports, allowing the elevator to be leveled.

The use of a hydraulic cylinder with an adjustable throttling valve as a power element of the lifting device allows smooth lowering of the platform even in the event of a depressurization of the system.

In the proposed design, the absence of movable structural elements (various elements of the kinematic drives of the elevators, including hydraulic cylinders) at the “O” mark allows the elevator to be operated in difficult weather conditions, as significantly reduces the likelihood of ice freezing and accumulation of dirt.

Existence of LED illumination of governing bodies allows to operate the elevator in the conditions of poor lighting.

This design has a minimum of moving parts, which ensures its reliable operation for a long period of time.

Compared with the prototype and analogues, the claimed design is simpler and more economical to manufacture and has wider operational capabilities, expanding the arsenal of technical means for the vertical raising and lowering of disabled people - wheelchairs and people with disabilities.

The device can be manufactured using well-known technologies, devices and parts and used in places where it is necessary to provide a comfortable stay for people with disabilities.

Claims (3)

1. A vertical lift for persons with disabilities, comprising vertical guides with a movable walk-through platform with movable safety barriers installed on them, a platform vertical lifting mechanism mounted on the base of the guides and including a working hydraulic cylinder, an electric power station and a drive control unit, characterized in that the lift is equipped with a foot-operated hydraulic pump and a manual-operated two-cylinder hydraulic pump, controlled by mechanical th motion control assembly platform mounted on the platform foldable ramp, and vertical lifting mechanism further includes a traction chain that connects the movable carriage with fixed on it and a work platform cylinder. 2. The lift according to claim 1, characterized in that the working hydraulic cylinder is equipped with an adjustable throttle valve. 3. The lift according to claim 1, characterized in that the mechanical unit for controlling the movement of the platform consists of a 3-position lever mechanically connected to a foot drive hydraulic pump valve and a manual drive two-cylinder hydraulic pump valve, as well as a manual 2-position directional switch.

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