Rotating mechanism of stair lifting chair and chair

Abstract

The utility model provides a stair lifting chair and a rotating mechanism of a seat, and relates to the technical field of stair lifting chairs, the rotating mechanism of the seat comprises a main machine, the seat, a first motor, a lead screw nut assembly and a gear rack assembly, the first motor is installed on the main machine to provide power output, the first motor is connected with the lead screw nut assembly, and the gear rack assembly is installed on the main machine. The first nut is installed on the first lead screw, the first motor is connected with the first lead screw and drives the first lead screw to rotate, then the first nut moves in the length direction of the first lead screw, and the first lead screw is rotatably installed on the main machine. A first rack of the gear and rack assembly is fixedly connected with the first nut, a first gear of the gear and rack assembly is connected with the seat, the first rack linearly moves along with the first nut to drive the first gear to rotate, and the first gear is connected with the seat. Thus, the first motor moves through the lead screw nut assembly and the gear and rack assembly, then the seat is driven to rotate, operation of people is facilitated, and the rotating force of people is greatly saved.

Description

Technical Field

[0001] This utility model relates to the field of stair lifting equipment technology, and in particular to a rotating mechanism for a stair lifting chair and seat. Background Technology

[0002] The stairlift chair consists of three main components: the track, the main unit, and the seat. The track's support legs are fixed to the stairs with expansion bolts. Depending on the site environment and customer preference, the track can be installed either on the side of the railing or on the side of the wall, parallel to either the railing or the wall. The main unit is suspended from the track, and its drive mechanism drives the main unit to move along the track, ensuring that the main unit and track remain parallel at all times.

[0003] In existing technology, the seat is connected to the top of the main unit via a flange. The seat can rotate horizontally relative to the main unit within a range of 0-80° via the flange. By default, the seat is parallel to the main unit, with its back against a guardrail or wall. The seat is equipped with a control lever, which is connected to a positioning bolt and a torsion spring. The positioning bolt on the seat engages with a slot on the top of the main unit to prevent the seat from rotating horizontally relative to the main unit. When the main unit is located on a stair step, the foot pedal on the main unit is relatively high above the step below, making it impossible for the user to sit or get off directly in front of the main unit. The user must manually move the control lever on the seat to disengage the positioning bolt from the slot on the top of the main unit, causing the seat to rotate horizontally relative to the main unit and face the upward direction of the stair steps, thus facilitating the user's entry or exit. In other words, when the main unit is stopped at a stair step, the user must manually move the control lever on the seat, push off the foot pedal with their foot, and twist their body to rotate the seat horizontally to face the upward direction of the steps before they can sit or get off. Manually rotating the seat causes inconvenience and safety hazards for the user. Utility Model Content

[0004] The purpose of this utility model is to provide a rotating mechanism for a stairlift chair and its seat, so as to solve the technical problems of inconvenient seat rotation operation and safety hazards in the prior art. The various technical effects of the preferred technical solution among the many technical solutions provided by this utility model are described in detail below.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] This utility model provides a rotating mechanism for a seat, which is used to install on a height-adjustable chair. The height-adjustable chair includes a main unit and a seat, and also includes a first motor, a lead screw and nut assembly, and a gear and rack assembly. The first motor is installed on the main unit and is connected to the lead screw and nut assembly to drive the first nut in the lead screw and nut assembly to move along the extension direction of the first lead screw. The first lead screw is rotatably installed on the main unit. The first rack in the gear and rack assembly is fixedly connected to the first nut, and the first gear in the gear and rack assembly is connected to the seat to realize that the first motor drives the seat to rotate.

[0007] Preferably, it also includes a limiting component. The host is provided with a mounting plate, the limiting component is mounted on the mounting plate, the limiting component is located at both ends of the first lead screw to limit the position of the first nut, and the limiting component is electrically connected to the first motor and the host.

[0008] Preferably, the limiting component includes a limit switch and a double-row micro switch installed at both ends of the mounting plate. The limit switch is electrically connected to the first motor to control the motor to close. The limit switch is a normally closed switch. The first control element of the double-row micro switch is electrically connected to the first motor and is a normally closed switch to control the first motor to close. The second control element is electrically connected to the host and is a normally open switch to control the host to open.

[0009] Preferably, the main unit is provided with a guide rod, the first nut is provided with a first through hole, and the guide rod passes through the first through hole.

[0010] Preferably, the seat is provided with a rotating seat shaft, a flat key is provided between the rotating seat shaft and the first gear, the main unit is provided with a second through hole, and the rotating seat shaft passes through the second through hole and is connected to the first gear.

[0011] Preferably, a self-lubricating bushing is provided between the sidewall of the second through hole and the rotating shaft of the rotating seat.

[0012] Preferably, a flat needle roller bearing is provided between the end face of the main unit and the end face of the rotating seat shaft.

[0013] Preferably, it also includes a self-resetting fuse, which is connected in series in the circuit of the first motor.

[0014] Preferably, the handle of the seat is provided with a button assembly, which is electrically connected to the main unit and the first motor to control the main unit and the first motor to turn on.

[0015] This application also provides a stair lift chair, including a rotating mechanism for any of the seats described above, and a guide rail for mounting on a wall or railing side. The main unit is mounted on the guide rail, and a second motor assembly within the main unit is capable of driving the main unit to move up and down along the guide rail.

[0016] The technical solution provided in this application document has the following beneficial effects:

[0017] This utility model provides a rotating mechanism for a stairlift chair and its seat. The rotating mechanism includes a main unit, a seat, a first motor, a lead screw and nut assembly, and a gear and rack assembly. The first motor is mounted on the main unit and provides power output. The first motor is connected to the lead screw and nut assembly to drive the first nut in the assembly to move along the extension direction of the first lead screw. The first nut is mounted on the first lead screw, and the first motor is connected to the first lead screw to drive the first lead screw to rotate, thereby causing the first nut to move along the length direction of the first lead screw. The first lead screw is rotatably mounted on the main unit. To facilitate the conversion of linear motion into circular rotation to achieve seat rotation, the first rack in the gear and rack assembly is fixedly connected to the first nut, and the first gear in the gear and rack assembly is connected to the seat. Since the first gear meshes with the first rack, the first rack moves linearly with the first nut, driving the first gear to rotate. Since the first gear is connected to the seat, the first motor drives the seat to rotate.

[0018] This design, with its primary motor that rotates via a lead screw and nut assembly and a gear and rack assembly, facilitates seat rotation and significantly reduces the effort required for operation. It eliminates the need for manual rotation required in existing technologies, greatly improving the seat's usability. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a diagram showing the operating status of the stair lift chair provided in Embodiment 1 of this utility model;

[0021] Figure 2 This is a diagram illustrating the state of a stairlift chair when people are getting on or off, according to an exemplary embodiment.

[0022] Figure 3 This is a three-dimensional structural schematic diagram of a seat according to an exemplary embodiment;

[0023] Figure 4 This is a schematic diagram illustrating the structure of the lead screw and nut assembly and the gear and rack assembly inside the main unit according to an exemplary embodiment;

[0024] Figure 5 yes Figure 3 A magnified view of part A in the image;

[0025] Figure 6 This is an exploded view of a stairlift chair according to an exemplary embodiment.

[0026] In the diagram: 1. Main unit; 11. First motor; 12. Second through hole; 2. Seat; 21. Rotary seat shaft; 3. Guide rail; 4. Lead screw and nut assembly; 41. First lead screw; 42. First nut; 5. Gear and rack assembly; 51. First gear; 52. First rack; 6. Limit assembly; 61. Limit switch; 62. Double-row micro switch; 63. Mounting plate; 7. Guide rod; 8. Self-lubricating bushing; 9. Flat needle roller bearing; 10. Self-resetting fuse. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be described in detail below. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other implementation methods obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0028] This specific embodiment provides a rotating mechanism for a stairlift chair and its seat, which solves the technical problem of inconvenient seat rotation operation and potential safety hazards in the prior art.

[0029] Hereinafter, embodiments will be described with reference to the accompanying drawings. Furthermore, the embodiments shown below do not limit the scope of the utility model as described in the claims. Additionally, the complete contents of the structures represented in the following embodiments are not limited to those necessary for the solution of the utility model as described in the claims.

[0030] Reference Figures 1-6This utility model provides a rotating mechanism for a seat, including a main unit 1, a seat 2, a first motor 11, a lead screw and nut assembly 4, and a gear and rack assembly 5. The first motor 11 is mounted on the main unit 1 and provides power output. The first motor 11 is connected to the lead screw and nut assembly 4 to drive the first nut 42 in the lead screw and nut assembly 4 to move along the extension direction of the first lead screw 41. The first nut 42 is mounted on the first lead screw 41. The first motor 11 is connected to the first lead screw 41 and drives the first lead screw 41 to rotate, thereby causing the first nut 42 to move along the length direction of the first lead screw 41. The first lead screw 41 is rotatably mounted on the main unit 1. To facilitate the conversion of linear motion into circular rotation to achieve seat rotation, the first rack 52 in the gear and rack assembly 5 is fixedly connected to the first nut 42, and the first gear 51 in the gear and rack assembly 5 is connected to the seat 2. Since the first gear 51 meshes with the first rack 52, the first rack 52 moves linearly with the first nut 42, driving the first gear 51 to rotate. Since the first gear 51 is connected to the seat 2, the first motor 11 drives the seat 2 to rotate.

[0031] This configuration, with the first motor 11 moving via the lead screw and nut assembly 4 and the gear and rack assembly 5, drives the seat 2 to rotate, making it easier for people to operate and greatly saving the force required for rotation. This changes the existing technology where people need to rotate their bodies to rotate the seat 2, significantly improving its convenience.

[0032] To further optimize the scheme, in order to facilitate limiting the movement distance of the first nut 42, a limit component 6 is also included. To facilitate the installation of the limit component 6, a mounting plate 63 is provided on the main unit 1, and the limit component 6 is installed on the mounting plate 63. Since the position of both ends needs to be limited when the first nut 42 moves, the limit component 6 is set at both ends of the first lead screw 41 to limit the position of the first nut 42. The limit component 6 is electrically connected to the first motor 11 and the main unit 1.

[0033] Specifically, the limit assembly 6 includes limit switches 61 and double-row micro switches 62 installed at both ends of the mounting plate 63. Limit switches 61 are electrically connected to the first motor 11 to control the motor's shutdown. Limit switches 61 are normally closed switches installed at the first end of the mounting plate 63. When the first nut 42 moves to the position of limit switches 61 and touches them, limit switches 61 open, and the first motor 11 stops rotating. The double-row micro switches 62 are located at the second end of the mounting plate 63. The first control element of the double-row micro switches 62 is electrically connected to the first motor 11 and is a normally closed switch to control the first motor 11 to shut down. The second control element is electrically connected to the main unit 1 and is a normally open switch to control the main unit 1 to open.

[0034] That is, such as Figure 1The image shows the required operating status of the seat. Figure 2 What is displayed is the seat rotated to a position for easy getting in and out. When people are using the seat, position 2 is in... Figure 2 In this state, the user sits down or gets up. When the user sits down, if the user controls the first motor 11 to rotate forward, the first nut 42 moves along the length of the first lead screw 41, that is, from left to right, driving the first rack 52 to move, so that the first gear 51 rotates counterclockwise. Figure 1 The seat status transition in the middle Figure 2 In the middle seat state, at this time, the first nut 42 touches the limit switch 61, the limit switch 61 controls the circuit connected to the first motor 11 to disconnect, and then the first motor 11 stops rotating.

[0035] When seat 2 is Figure 2 State change to Figure 1 In the current state, the first motor 11 rotates in the reverse direction, causing the first nut 42 to move along the length of the first lead screw 41, i.e., from right to left, which drives the first rack 52 to move, causing the first gear 51 to rotate clockwise. Figure 2 The seat status transition in the middle Figure 1 In the middle seat state, at this time, the first nut 42 touches the double row micro switch 62, which is equipped with two switches. That is, the circuit of the first control component in the double row micro switch 62 connected to the first motor 11 is disconnected, and then the first motor 11 stops rotating. At the same time, the circuit of the second motor that controls the movement of the main unit is connected, and the second motor drives the seat 2 to move up and down.

[0036] To further optimize the design and ensure smooth movement of the first nut 42, a guide rod 7 is provided on the main unit 1, and a first through hole is provided on the first nut 42. The guide rod 7 passes through the first through hole. On the one hand, when the first lead screw 41 rotates, the first nut 42 will not rotate due to the friction of the first lead screw 41, thus keeping the first nut 42 and the first rack 52 in horizontal motion. On the other hand, the rotation of the seat 2 generates torque on the first lead screw 41 and the first nut 42. The guide rod 7 keeps the thread center axis of the first nut 42 parallel to the center axis of the first lead screw 41, reducing the wear of the T-shaped threads of the first nut 42 and the first lead screw 41.

[0037] To further optimize the design, in order to facilitate the connection between the seat 2 and the first gear 51, a rotating seat shaft 21 is provided on the seat 2. A flat key is provided between the rotating seat shaft 21 and the first gear 51, so that the first gear 51 and the rotating seat shaft 21 are connected together. In order to ensure the integrity of the main unit 1, a second through hole 12 is provided on the main unit 1, and the rotating seat shaft 21 passes through the second through hole 12 to connect with the first gear 51.

[0038] To further optimize the design, in order to reduce the friction between the rotating seat shaft 21 and the second through hole 12, a self-lubricating bushing 8 is provided between the side wall of the second through hole 12 and the rotating seat shaft 21. This reduces the friction between the second through hole 12 and the rotating seat shaft 21, making it easier for the rotating seat shaft 21 to rotate.

[0039] In a further optimized design, the rotating seat shaft 21 not only contacts the side wall of the second through hole on the main unit 1, but also contacts the end face of the second through hole. In order to reduce the friction between the end face of the main unit 1 and the end face of the rotating seat shaft 21, a flat needle roller bearing 9 is provided between the end face of the main unit 1 and the rotating seat shaft 21 to reduce the friction between the rotating seat shaft 21 and the end face of the main unit 1.

[0040] Further optimization of the scheme also includes a self-resetting fuse 10, which is connected in series in the circuit of the first motor 11. To prevent the first motor 11 from stalling, the circuit of the first motor 11 is connected in series with the self-resetting fuse 10. When the resistance of the seat 2 is too great or it hits an obstacle during operation, the self-resetting fuse 10 is de-energized, and the first motor 11 is de-energized. Pressing the self-resetting fuse 10 can restore the power to the first motor 11.

[0041] To further optimize the design and facilitate user operation, a button assembly is provided at the handle position of the seat 2. The button assembly is electrically connected to the host 1 and the first motor 11 to control the host 1 and the first motor 11 to turn on and off. Alternatively, it can be designed as a remote control, which the user can operate.

[0042] This application also provides a stair lift chair, including a rotating mechanism for any of the seats, and a guide rail 3 for mounting on a wall or railing. The main unit 1 is mounted on the guide rail 3, and a second motor assembly inside the main unit 1 can drive the main unit 1 to move up and down along the guide rail 3. This configuration facilitates users going up and down stairs.

[0043] It should be noted that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., used herein to indicate the orientation or positional relationship shown in the accompanying drawings, are merely for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0044] In this description, it should also be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0045] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.

[0046] It is understood that the same or similar parts in the above embodiments can be referred to each other, and the content not described in detail in some embodiments can be referred to the same or similar content in other embodiments. The multiple solutions provided in this application contain their own basic solutions, are independent of each other, and do not restrict each other, but they can also be combined with each other without conflict to achieve multiple effects.

[0047] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application.

Claims

1. A swivel mechanism of a seat for mounting on a lifting chair, said lifting chair comprising a main frame (1) and a seat (2), characterized in that, It also includes a first motor (11), a lead screw and nut assembly (4), and a gear and rack assembly (5). The first motor (11) is mounted on the host (1). The first motor (11) is connected to the lead screw and nut assembly (4) to drive the first nut (42) in the lead screw and nut assembly (4) to move along the extension direction of the first lead screw (41). The first lead screw (41) is rotatably mounted on the host (1). The first rack (52) in the gear and rack assembly (5) is fixedly connected to the first nut (42). The first gear (51) in the gear and rack assembly (5) is connected to the seat (2) to realize that the first motor (11) drives the seat (2) to rotate.

2. The swivel mechanism of a seat according to claim 1, characterized in that It also includes a limiting component (6), on which a mounting plate (63) is provided, the limiting component (6) is mounted on the mounting plate (63), the limiting component (6) is located at both ends of the first lead screw (41) to limit the position of the first nut (42), and the limiting component (6) is electrically connected to the first motor (11) and the main unit (1).

3. A seat swivel mechanism according to claim 2, wherein The limiting component (6) includes a limit switch (61) and a double-row micro switch (62) installed at both ends of the mounting plate (63). The limit switch (61) is electrically connected to the first motor (11) to control the motor to close. The limit switch (61) is a normally closed switch. The first control element of the double-row micro switch (62) is electrically connected to the first motor (11) and is a normally closed switch to control the first motor (11) to close. The second control element is electrically connected to the host (1) and is a normally open switch to control the host (1) to open.

4. The swivel mechanism for a seat according to claim 1, characterized by The host (1) is provided with a guide rod (7), and the first nut (42) is provided with a first through hole, and the guide rod (7) passes through the first through hole.

5. The swivel mechanism of claim 1, wherein The seat (2) is provided with a rotating seat shaft (21), and a flat key is provided between the rotating seat shaft (21) and the first gear (51). The main unit (1) is provided with a second through hole (12), and the rotating seat shaft (21) passes through the second through hole (12) to connect with the first gear (51).

6. A seat swivel mechanism according to claim 5, wherein A self-lubricating bushing (8) is provided between the side wall of the second through hole (12) and the rotating seat shaft (21).

7. The swivel mechanism of claim 5, wherein, A flat needle roller bearing (9) is provided between the end face of the host (1) and the end face of the rotating seat shaft (21).

8. The swivel mechanism of claim 1, wherein, It also includes a self-resetting fuse (10), which is connected in series in the circuit of the first motor (11).

9. The swivel mechanism of claim 1, wherein, The seat (2) has a button assembly at the handle position. The button assembly is electrically connected to the host (1) and the first motor (11) to control the host (1) and the first motor (11) to turn on.

10. A stair lift chair, characterized by The rotating mechanism of the seat according to any one of claims 1-9 further includes a guide rail (3) for mounting on the wall side or the guardrail side, the main unit (1) is mounted on the guide rail (3), and the second motor assembly in the main unit (1) is capable of driving the main unit (1) to move up and down along the guide rail (3).

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