Stair climbing chair

Abstract

A stair climbing chair comprises a bottom frame, a seat, a first crawler belt mechanism, a telescopic frame and a second crawler belt mechanism, the seat is installed on the bottom frame in a swinging mode and used for carrying people or objects, the first crawler belt mechanism is fixed to the bottom frame and used for providing first power for climbing of the stair climbing chair, the telescopic frame is installed on the bottom frame in a telescopic mode, and the second crawler belt mechanism is fixed to the telescopic frame and used for providing second power for climbing of the stair climbing chair. The telescopic frame slides relative to the bottom frame to adjust the distance between the first track mechanism and the second track mechanism, so that the bottom width of the stair-climbing chair is changed, and it is guaranteed that the gravity center of the stair-climbing chair is located between the first track mechanism and the second track mechanism all the time in the moving process of the stair-climbing chair; and the stability of the stair-climbing chair is ensured.

Description

Technical Field

[0001] This utility model belongs to the field of transportation equipment technology, specifically relating to a stair-climbing chair for climbing stairs. Background Technology

[0002] Currently, tracked stair climbers on the market move horizontally along the corner of a staircase using tracks. However, the contact area between the tracks and the corner is small, causing the tracks to slip, affecting the climbing efficiency of the machine, and even posing a risk of slipping off the stairs. A utility model application with application number 202420451422.X discloses a stair climbing device including a first track mechanism and a second track mechanism connected to each other. The lower end face of the second track mechanism is inclined relative to the lower end face of the first track mechanism. The stability of the stair climber is achieved by the alternating contact of the first and second track mechanisms against the stair surface. However, the positional relationship between the first and second track mechanisms in this device is fixed, making it impossible to adjust the center of gravity of the stair climber according to the slope of the stairs. This results in decreased stability when facing steep staircases. Summary of the Invention

[0003] To address the above shortcomings, the technical problem to be solved by this utility model is to provide a stair-climbing chair that allows for easy adjustment of the center of gravity, making it suitable for stairs with different inclines.

[0004] To solve the above technical problems, the technical solution adopted by this utility model is as follows:

[0005] A stair-climbing chair, comprising:

[0006] Base frame;

[0007] The seat is mounted on the base frame in a swing-out manner and is used to carry people or goods.

[0008] The first track mechanism, fixed to the base frame, is used to provide the primary power for the stair-climbing chair to crawl;

[0009] Telescopic frame, which can be telescopically installed on the base frame;

[0010] The second track mechanism, fixed on the telescopic frame, is used to provide a second power for the climbing chair to crawl. The distance between the first track mechanism and the second track mechanism is adjusted by the sliding of the telescopic frame relative to the base frame.

[0011] As a preferred embodiment of this utility model, an electric push cylinder is connected between the base frame and the telescopic frame, and the seat and the telescopic frame are moved relative to each other by the electric push cylinder.

[0012] As a preferred embodiment of this utility model, an electric pusher cylinder is installed on the base frame, and the electric pusher cylinder is connected to the telescopic frame through a connecting rod.

[0013] In a preferred embodiment of this utility model, the electric push cylinder is rotatably connected to the seat via a first rotating shaft, and the connecting rod is rotatably connected to the seat via a second rotating shaft. The first and second rotating shafts are coaxially arranged so that the electric push cylinder can simultaneously drive the telescopic frame to extend and retract and the seat to swing.

[0014] As a preferred embodiment of this utility model, the telescopic frame includes a guide rod and connecting beams and mounting beams respectively connected to both ends of the guide rod. The guide rod is slidably mounted on the base frame, and the second track mechanism is fixed on the mounting beam.

[0015] As a preferred embodiment of this utility model, the bottom of the second track mechanism is provided with at least two second transmission surfaces that are inclined to each other.

[0016] As a preferred embodiment of this utility model, the bottom of the first track mechanism is provided with at least three first transmission surfaces that are inclined to each other.

[0017] In a preferred embodiment of this utility model, the first transmission surface and the second transmission surface are inclined to each other.

[0018] As a preferred embodiment of the present invention, the base frame includes a first connecting frame for mounting a first track mechanism and a second connecting frame for mounting a second track mechanism, wherein the first connecting frame and the second connecting frame are inclined to each other.

[0019] As a preferred embodiment of this utility model, at least two guide beams are provided on the second connecting frame, and the telescopic frame is slidably connected to the two guide beams respectively.

[0020] Compared with the prior art, the beneficial effects of this utility model are: (1) By extending and retracting the telescopic frame relative to the base frame, the distance between the first track mechanism and the second track mechanism can be adjusted. The width of the base of the stair-climbing chair can be adjusted according to the needs so that the stair-climbing chair can adapt to different slopes and ensure that the stair-climbing chair has good stability on stairs with different slopes.

[0021] (2) The electric push cylinder is connected to the seat and the telescopic frame respectively, so that the tilt angle of the seat can be adjusted at the same time during the adjustment of the telescopic frame, thereby improving the convenience of using the stair-climbing chair. Attached Figure Description

[0022] Figure 1 This is a structural diagram of the stair-climbing chair.

[0023] Figure 2 yes Figure 1 A schematic diagram of the structure after being rotated at a certain angle.

[0024] Figure 3 This is a structural diagram of the telescopic frame.

[0025] Figure 4 This is a structural diagram of the base frame.

[0026] Figure 5 These are pictures showing the process of using the stair-climbing chair.

[0027] Reference numerals: Base frame 1, First connecting frame 1-1, Second connecting frame 1-2, Guide beam 1-3, First track plate 1-4, Seat 2, First track mechanism 3, First transmission surface 3-1, First driver 3-2, First track 3-3, Telescopic frame 4, Guide rod 4-1, Connecting beam 4-2, Mounting beam 4-3, Second track plate 4-4, Second track mechanism 5, Second transmission surface 5-1, Second track 5-2, Second driver 5-3, Electric pusher cylinder 6, Connecting rod 7, First rotating shaft 8, Second rotating shaft 9. Detailed Implementation

[0028] The present invention will now be further described with reference to the accompanying drawings.

[0029] A stair-climbing chair includes: a base frame 1, a seat 2, a first track mechanism 3, a telescopic frame 4, and a second track mechanism 5. The seat 2 is swayably mounted on the base frame 1 for carrying people or goods. The first track mechanism 3 is fixed to the base frame 1 to provide the first power for the stair-climbing chair to climb. The telescopic frame 4 is telescopically mounted on the base frame 1. The second track mechanism 5 is fixed to the telescopic frame 4 to provide the second power for the stair-climbing chair to climb. The distance between the first track mechanism 3 and the second track mechanism 5 is adjusted by sliding the telescopic frame 4 relative to the base frame 1, thereby changing the bottom width of the stair-climbing chair and ensuring that the center of gravity of the stair-climbing chair is always located between the first track mechanism 3 and the second track mechanism 5 during movement, thus ensuring the stability of the stair-climbing chair.

[0030] During the use of the stair-climbing chair, when the stair slope is gentle, the distance between the first track mechanism 3 and the second track mechanism 5 can be reduced by adjusting the telescopic frame 4, thus reducing the floor space occupied by the chair. When the stair slope is steep, the distance between the first track mechanism 3 and the second track mechanism 5 can be increased by adjusting the telescopic frame 4, thereby improving the stability of the chair. The distance between the first track mechanism 3 and the second track mechanism 5 can be adjusted as needed to ensure good stability of the chair on staircases with varying slopes.

[0031] The base frame 1 includes a first connecting frame 1-1 for mounting the first track mechanism 3 and a second connecting frame 1-2 for mounting the second track mechanism 5. The first connecting frame 1-1 and the second connecting frame 1-2 are inclined to each other to ensure that the base frame 1 has better load-bearing capacity. The end of the first connecting frame 1-1 is provided with a first track plate 1-4, and the first track mechanism 3 is mounted on the first connecting frame 1-1 through the first track plate 1-4. The first track mechanism 3 includes four track wheels, a first track 3-3, and a first drive 3-2. The four track wheels are rotatably mounted on the first track plate 1-4, and the first track 3-3 is sleeved on the outside of the four track wheels. The four track wheels form three first transmission surfaces 3-1 at the bottom of the first track mechanism 3, and the three first transmission surfaces 3-1 are inclined to each other to ensure that at least one first transmission surface 3-1 is in contact with the horizontal plane or external corner of the staircase. This ensures that the first track mechanism 3 can always provide crawling power for the stair climbing chair, thereby ensuring that the stair climbing machine can move stably on the stairs. At least two guide beams 1-3 are provided on the second connecting frame 1-2. The telescopic frame 4 is slidably connected to the two guide beams 1-3 respectively to ensure the stability of the telescopic frame 4 relative to the base frame 1 during telescopic movement. The first drive 3-2 is connected to one of the track wheels through a connecting shaft to drive the track wheel to rotate, thereby driving the first track 3-1 to move. Preferably, the first drive 3-2 includes a motor and a reducer. The motor is connected to the connecting shaft through the reducer to drive the connecting shaft to rotate.

[0032] The telescopic frame 4 includes a guide rod 4-1 and connecting beams 4-2 and mounting beams 4-3 respectively connected to both ends of the guide rod 4-1. The guide rod 4-1 is slidably connected to the two guide beams 1-3 respectively. Second track plates 4-4 are connected to both ends of the mounting beams 4-3. The second track mechanism 5 is fixed on the second track plates 4-4. The second track mechanism 5 includes three track wheels, a second track 5-2, and a second drive 5-3. The three track wheels are rotatably mounted on the second track plate 4-4. The second track 5-2 is fitted over the outside of the three track wheels. The three track wheels form two mutually inclined second transmission surfaces 5-1 at the bottom of the second track mechanism 5. Each first transmission surface 3-1 is inclined relative to each second transmission surface 5-1, ensuring that at least one second transmission surface 5-1 abuts against the horizontal plane or external corner of the staircase. The second drive 5-3 is fixed on the mounting beam 4-3, and the structure of the second drive 5-3 is similar to that of the first drive 3-2, both including a motor and a reducer. The motor is connected to the connecting shaft through the reducer, driving the connecting shaft to rotate, thereby driving the track wheels to rotate.

[0033] To facilitate the movement of the telescopic frame 4 relative to the base frame 1, an electric push cylinder 6 is connected between the base frame 1 and the telescopic frame 4, and the seat 2 and the telescopic frame 4 are moved relative to each other by the electric push cylinder 6.

[0034] To simultaneously drive the telescopic frame 4 to move and the seat 2 to swing via the electric cylinder 6, the electric cylinder 6 is mounted on the base frame 1 and is rotatably connected to the seat 2 via a first rotating shaft 8. A connecting rod 7 connects the seat 2 and the telescopic frame 4. During the swinging of the seat 2, the telescopic frame 4 is driven to extend and retract relative to the base frame 1, allowing for simultaneous adjustment of the seat's tilt angle while adjusting the telescopic frame, thus improving the usability of the stair-climbing chair. To ensure that the electric cylinder 6 can stably drive the telescopic frame 4 to move, the connecting rod 7 is rotatably connected to the seat 2 via a second rotating shaft 9. The first rotating shaft 8 and the second rotating shaft 9 are coaxially arranged. When the extension of the electric cylinder 6 is fixed, the electric cylinder 6, the connecting rod 7, and the telescopic frame 4 form a stable triangular structure, thereby maintaining the relative position between the telescopic frame 4 and the base frame 1.

[0035] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention; therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

[0036] Although this document uses many terms corresponding to the reference numerals in the figures, the possibility of using other terms is not excluded; these terms are used only to more conveniently describe and explain the essence of this utility model; interpreting them as any kind of additional limitation would be contrary to the spirit of this utility model.

Claims

1. A stair-climbing chair, characterized in that, include: Base frame (1); Seat (2), which can be swung and mounted on the base frame (1), is used to carry people or goods; The first track mechanism (3) is fixed on the base frame (1) and is used to provide the first power for the climbing chair to crawl; Telescopic frame (4) is telescopically mounted on base frame (1); The second track mechanism (5) is fixed on the telescopic frame (4) and is used to provide a second power for the climbing chair to crawl. The distance between the first track mechanism (3) and the second track mechanism (5) is adjusted by the sliding of the telescopic frame (4) relative to the base frame (1).

2. The stair-climbing chair according to claim 1, characterized in that, An electric push cylinder (6) is connected between the base frame and the telescopic frame (4), and the seat (2) and the telescopic frame (4) are driven to move relative to each other by the electric push cylinder (6).

3. A stair-climbing chair according to claim 1, characterized in that, An electric push cylinder (6) is installed on the base frame, and the electric push cylinder (6) is connected to the telescopic frame (4) through a connecting rod (7).

4. A stair-climbing chair according to claim 3, characterized in that, The electric push cylinder (6) is rotatably connected to the seat (2) via the first rotating shaft (8), and the connecting rod (7) is rotatably connected to the seat (2) via the second rotating shaft (9). The first rotating shaft (8) and the second rotating shaft (9) are coaxially arranged so that the electric push cylinder (6) can simultaneously drive the telescopic frame (4) to extend and retract and the seat (2) to swing.

5. A stair-climbing chair according to claim 1, characterized in that, The telescopic frame (4) includes a guide rod (4-1) and a connecting beam (4-2) and a mounting beam (4-3) respectively connected to both ends of the guide rod (4-1). The guide rod (4-1) is slidably mounted on the base frame (1), and the second track mechanism (5) is fixed on the mounting beam (4-3).

6. A stair-climbing chair according to claim 1, characterized in that, The bottom of the second track mechanism (5) is provided with at least two second transmission surfaces (5-1) that are inclined to each other.

7. A stair-climbing chair according to claim 6, characterized in that, The bottom of the first track mechanism (3) is provided with at least three first transmission surfaces (3-1) that are inclined to each other.

8. A stair-climbing chair according to claim 7, characterized in that, The first transmission surface (3-1) and the second transmission surface (5-1) are inclined to each other.

9. A stair-climbing chair according to claim 1, characterized in that, The base frame (1) includes a first connecting frame (1-1) for mounting the first track mechanism (3) and a second connecting frame (1-2) for mounting the second track mechanism (5), with the first connecting frame (1-1) and the second connecting frame (1-2) being inclined to each other.

10. A stair-climbing chair according to claim 9, characterized in that, At least two guide beams (1-3) are arranged on the second connecting frame (1-2), and the telescopic frame (4) is slidably connected to the two guide beams (1-3) respectively.

Images