Deformable multifunctional obstacle crossing carrier

Abstract

A deformable support comprises a chair frame seat, a chair frame and a chair frame driving assembly, the front end of the chair frame is rotationally connected to the chair frame seat, the chair frame driving assembly is connected between the middle of the chair frame and the chair frame seat, and under the action of the chair frame driving assembly, the chair frame has two states on the chair frame seat; the chair frame is attached to the chair frame seat or forms a certain included angle with the chair frame seat; the seat plate assembly is mounted on the chair frame, and the seat plate assembly is adjusted to be in a seat state or a flat plate state according to use requirements; the triangular driving wheel assembly is arranged at the bottom of the front end of the chair frame seat and has a step climbing mode and a level road advancing mode; the traveling wheel assembly is arranged at the bottom of the rear end of the wheelchair seat; the pedal assembly is arranged at the front end of the chair frame and has two states of stretching out of the chair frame and retracting into the chair frame. When the carrier travels on a flat road, the triangular driving wheel assembly is switched to a flat road advancing mode, and the chair frame is adjusted to form a certain included angle with the chair frame seat; when the carrier climbs the steps, the chair frame is adjusted to be attached to the chair frame base, and the triangular wheel assembly is switched to the step climbing mode. Besides, the seat plate assembly and the pedal assembly are arranged on the chair frame, and the requirements for carrying people and objects are met through deformation of the seat plate assembly and the pedal assembly.

Description

Technical Field

[0001] The present invention relates to the technical field of wheelchairs, and particularly to a deformable multi-functional obstacle-crossing vehicle. Background Art

[0002] With the acceleration of the aging population process and the increasing demand for barrier-free facility construction, the application scenarios of wheelchairs as mobility aids have become increasingly diversified. Although traditional wheelchairs can achieve basic mobility functions on flat roads, they have significant limitations when facing complex terrains such as steps and stairs.

[0003] In addition, small carts, as basic transportation tools, are also tools for daily household use. The functions and structures of small carts and wheelchairs are relatively similar, and the operating conditions of small carts and wheelchairs overlap significantly. In addition, both of them require a large amount of space for storage.

[0004] There is an urgent need to develop a vehicle that can be used as both a wheelchair and a small cart, and also has the function of climbing stairs. By achieving multiple functions with one object, it is possible to save the space occupied by the vehicle in the family house and realize multiple functions. Summary of the Invention

[0005] In view of the above-mentioned defects existing in the prior art, a deformable multi-functional obstacle-crossing vehicle is provided, which has the functions of a wheelchair and a cart, and can also have the functions of climbing stairs and traveling on flat roads.

[0006] The technical solution adopted by the present invention to solve the above technical problems is as follows: A deformable multi-functional obstacle-crossing vehicle, comprising a deformation bracket, including a chair frame base, a chair frame, and a chair frame drive assembly. The front end of the chair frame is rotatably connected to the chair frame base, and the chair frame drive assembly is connected between the middle of the chair frame and the chair frame base. Under the action of the chair frame drive assembly, the chair frame has two states on the chair frame base, either fitting on the chair frame base or forming a certain angle with the chair frame base; a seat plate assembly, which is installed on the chair frame and can be adjusted to a seat state or a flat plate state according to usage requirements; a triangular drive wheel assembly and a traveling wheel assembly. The triangular drive wheel assembly is provided at the front bottom of the chair frame base and has a stair climbing mode and a flat road traveling mode; the traveling wheel assembly is provided at the rear bottom of the wheelchair seat; a footrest assembly, which is provided at the front end of the chair frame and has two states of extending out of the chair frame and retracting into the chair frame.

[0007] According to the above technical solution, the chair frame drive assembly includes an upper chair frame link, a lower chair frame link, an intermediate rotating shaft, a gear set, and a motor; the upper chair frame link and the lower chair frame link are arranged on both sides of the chair frame. One end of the upper chair frame link is rotatably connected to the chair frame through a rotating shaft, and the other end of the upper chair frame link and one end of the lower chair frame link are connected through a rotating shaft. The other ends of the lower chair frame links on both sides are fixedly connected to the intermediate rotating shaft; the intermediate rotating shaft is rotatably connected to the chair frame seat; a cross beam is fixedly provided on the chair frame seat, and the motor is fixedly installed on the cross beam; the output shaft of the motor is connected to the driving wheel of the gear set, the driven wheel of the gear set is fixed on the intermediate rotating shaft, and the driving wheel and the driven wheel of the gear set mesh with each other.

[0008] According to the above technical solution, the chair frame drive assembly includes an upper chair frame link, a lower chair frame link, an intermediate rotating shaft, a crank, and a telescopic push rod. The upper chair frame link and the lower chair frame link are arranged on both sides of the chair frame. One end of the upper chair frame link is rotatably connected to the chair frame through a rotating shaft, and the other end of the upper chair frame link and one end of the lower chair frame link are connected through a rotating shaft. The other ends of the lower chair frame links on both sides are fixedly connected to the intermediate rotating shaft; the intermediate rotating shaft is rotatably connected to the chair frame seat; one end of the crank is fixed on the intermediate rotating shaft, and the other end of the crank and the end of the telescopic push rod are connected through a rotating shaft. The other end of the telescopic push rod is connected to the chair frame seat through a rotating shaft; the boundary points of the rotation trajectory range of the telescopic push rod driving the crank respectively correspond to: the lower chair frame link and the upper chair frame beam are on the same straight line, the position of the rotating shaft at the connection of the upper chair frame link and the lower chair frame link is below the height of the intermediate rotating shaft, and the chair frame and the chair frame seat are in contact.

[0009] According to the above technical solution, the seat plate assembly includes an armrest assembly and a seat plate and backrest assembly; The seat back assembly includes a backrest frame, a backrest frame strut, a seat plate frame, and a seat plate strut; both sides of the backrest frame and the seat plate frame are connected to the chair frame through rotating shafts, and the rotating shafts at the connections of the backrest frame and the chair frame and the seat plate frame and the chair frame are on the same straight line parallel to the length direction of the chair frame; the seat plate frame is located in front of the backrest frame, and a set gap is left between them; at least one backrest frame strut is connected between the backrest frame and the seat plate frame. One end of the backrest frame strut is slidably connected to the end of the backrest frame close to the seat plate frame, and the other end of the backrest frame strut and one end of the seat plate frame are connected through a rotating shaft; at least one seat plate strut is connected between the seat plate frame and the chair frame, or between the seat plate frame and the chair frame seat. One end of the seat plate strut is connected to the front end of the seat plate frame through a rotating shaft. The other side of the seat plate strut is provided with a first guide groove and a first card slot communicating with the first guide groove. The first card slot is located at the end of the first guide groove far from the seat plate frame. A first guiding and clamping rod is provided on the chair frame or the chair frame seat, and the first guiding and clamping rod is slidably connected in the first guide groove and the first card slot; The armrest assembly includes an armrest and an armrest support rod. One end of the armrest is connected to the chair frame through a rotating shaft. One end of the armrest support rod is connected to the middle part of the armrest through a rotating shaft. On the other side of the armrest support rod, there are a second guide groove and a second clamping groove communicating with the second guide groove. The first clamping groove is located at the end of the first guide groove far from the armrest; A second guiding clamping rod is fixedly arranged on the chair frame, and the second guiding clamping rod is slidably connected in the second guide groove and the second clamping groove.

[0010] According to the above technical solution, the seat plate assembly includes an armrest assembly and a seat plate and backrest assembly; The seat back assembly includes a backrest frame, a backrest frame support rod, a seat plate frame, and a first telescopic rod; Both sides of the backrest frame and the seat plate frame are connected to the chair frame through rotating shafts, and the rotating shafts at the connection between the backrest frame and the chair frame and the rotating shafts at the connection between the seat plate frame and the chair frame are located on the same straight line parallel to the length direction of the chair frame; The seat plate frame is located in front of the backrest frame, and a set gap is left between the two; At least one backrest frame support rod is connected between the backrest frame and the seat plate frame. One end of the backrest frame support rod is slidably connected to the end of the backrest frame close to the seat plate frame, and the other end of the backrest frame support rod and one end of the seat plate frame are connected through a rotating shaft; The two ends of the first telescopic rod are respectively connected to the seat plate frame and the chair frame, or the seat plate frame and the chair frame seat through rotating shafts; The armrest assembly includes an armrest and a second telescopic rod. One end of the armrest is connected to the chair frame through a rotating shaft. One end of the second telescopic rod is connected to the middle part of the armrest through a rotating shaft, and the other end of the second telescopic rod is connected to the chair frame seat through a rotating shaft.

[0011] According to the above technical solution, a backrest is detachably arranged on the backrest frame, and a seat plate is detachably arranged on the seat plate frame; Both the backrest and the seat plate have two sides, a cargo-carrying surface and a passenger-carrying surface, and the upward-facing surfaces of the seat plate and the backrest can be selected according to requirements.

[0012] According to the above technical solution, the triangular drive wheel assembly includes a triangular wheel mechanism, a drive mechanism, and a braking mechanism; The triangular wheel mechanism includes a base bracket fixed to the front side of the bottom of the chair frame seat, a drive shaft rotatably connected to the base bracket, triangular wheel frames fixed to both ends of the drive shaft, and rollers circumferentially distributed on the triangular wheel frames; The drive mechanism includes a motor fixed to the base bracket, a clutch connected to the output shaft of the motor, an intermediate shaft connected to the other end of the clutch, and a chain and sprocket connected between the intermediate shaft and the drive shaft; The braking mechanism restricts the self-rotation of the rollers according to requirements, and the braking mechanism adopts an existing structure.

[0013] According to the above technical solution, the traveling wheel assembly includes a traveling wheel bracket fixed to the rear side of the bottom of the chair frame seat, and a universal wheel with a foot brake connected to the bottom of the traveling wheel bracket.

[0014] According to the above technical solution, the footrest assembly includes a footrest bracket, a footrest, a connecting rod, and a driving cylinder. There are two parallel chutes along the vehicle's forward direction in the seat frame base, and through slots are provided on the opposite sides of the rear sections of the two chutes; the footrest bracket includes a telescopic section and a support section, and the support section is connected to the front end of the telescopic section through a rotating shaft; the telescopic section is placed in the chute, and the inner ends of the telescopic sections in the two chutes are fixedly connected through the connecting rod passing through the through slot; one end of the driving cylinder is connected to the seat frame base, and the other end of the driving cylinder is connected to the connecting rod; when the connecting rod runs to the rear end of the through slot, the telescopic section is completely placed in the chute, and the support section is partially placed in the chute; when the connecting rod runs to the front end of the through slot, the telescopic section partially extends out of the chute, and the support section is completely outside the chute; the footrest is installed between the two side support sections. Alternatively, the footrest assembly includes a footrest bracket, a footrest, and a driving cylinder. There are two parallel chutes along the vehicle's forward direction in the seat frame base; the footrest bracket includes a telescopic section and a support section, and the support section is connected to the front end of the telescopic section through a rotating shaft; the telescopic section is placed in the chute, and the inner ends of the telescopic sections in the two chutes are fixedly connected through the connecting rod passing through the through slot; the driving cylinder is placed inside the chute, and the driving cylinder is connected between the inner wall of the chute and the inner end of the telescopic section; when the driving cylinder is retracted to the shortest, the telescopic section is completely placed in the chute, and the support section is partially placed in the chute; when the driving cylinder is extended to the longest, the telescopic section partially extends out of the chute, and the support section is completely outside the chute; the footrest is installed between the two side support sections.

[0015] According to the above technical solution, a footrest support plate is provided at the bottom of the front end exit of the chute, a guide wheel matching the footrest support plate is provided on the support section, and an arc-shaped guide rail is provided on the footrest support plate; during the process of the support section sliding into the chute along with the telescopic section, the footrest support plate contacts the bottom of the support section and drives the straight rod section to rotate around its rotating shaft connection with the telescopic section. The support section adopts an L-shaped structure, the footrest is rotatably connected to the connection of the vertical section and the horizontal section of the L-shaped structure, and limit structures are provided on both the horizontal section and the vertical section; according to requirements, the footrest is fixed on the horizontal section or the vertical section by using the limit structure.

[0016] The present invention has the following beneficial effects: 1. A deformable bracket is provided, and a triangular drive wheel assembly is provided at the bottom of the seat frame base; when the vehicle is traveling on a flat road, the triangular drive wheel assembly switches to the flat road traveling mode, and the seat frame is adjusted to form a certain angle with the seat frame base; when the vehicle is climbing a ladder, the seat frame is adjusted to fit on the seat frame base, and the triangular wheel assembly switches to the ladder climbing mode. In addition, a seat plate assembly and a footrest assembly are provided on the seat frame, and the deformation of the seat plate assembly and the footrest assembly is used to meet the needs of carrying people and goods.

[0017] Based on the above structure, while having the functions of a wheelchair and a cart, it can also have the functions of climbing stairs and traveling on flat roads.

[0018] 2. Set two structural forms of the chair frame drive assembly to meet the layout requirements of the chair frame drive assembly in different scenarios and improve the applicability of the vehicle.

[0019] 3. Set a clutch in the triangular drive wheel assembly to switch or connect the power transmission between the motor and the triangular wheel according to the driving road conditions of the vehicle, and meet the usage requirements of the vehicle for traveling on flat roads and climbing stairs.

[0020] 4. In the footrest assembly, set a footrest and a guide wheel to guide the support section of the footrest bracket to avoid jamming during the process of retracting the footrest bracket into the chair frame seat.

[0021] The above description is only an overview of the technical solution of the present invention. In order to understand the technical means of the present invention more clearly and implement it according to the content of the specification, the following takes the preferred embodiments of the present invention and combines with the drawings to explain in detail as follows. The specific implementation manners of the present invention are given in detail by the following embodiments and their drawings. Brief Description of the Drawings

[0022] The drawings described herein are used to provide a further understanding of the present invention, form a part of this application, and the schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation to the present invention.

[0023] Figure 1 It is a schematic structural diagram of the flat wheelchair state of the embodiment provided by the present invention; Figure 2 It is a schematic structural diagram of the chair frame drive assembly of the first embodiment provided by the present invention; Figure 3 It is a schematic structural diagram of the chair frame drive assembly of the second embodiment provided by the present invention; Figure 4 It is a schematic structural diagram (detail drawing) of the flat wheelchair state of the embodiment provided by the present invention; Figure 5 It is a schematic structural diagram of the backrest frame strut and the armrest strut of the embodiment provided by the present invention; Figure 6 It is a top view of the seat plate assembly and the footrest assembly in the load-carrying state of the embodiment provided by the present invention; Figure 7 It is a schematic structural diagram of the triangular drive wheel assembly of the embodiment provided by the present invention Figure 1 ; Figure 8 It is a schematic structural diagram of the triangular drive wheel assembly of the embodiment provided by the present invention Figure 2 ; Figure 9 It is a schematic diagram of the state change of the pedal assembly in the embodiment provided by the present invention; Figure 10 It is a schematic structural diagram of the flat cart state in the embodiment provided by the present invention; Figure 11 It is a schematic structural diagram of the climbing ladder cart state in the embodiment provided by the present invention; Figure 12 It is a schematic structural diagram of the climbing ladder wheelchair state in the embodiment provided by the present invention; Figure 13 It is a schematic structural diagram of the pedal assembly in the second embodiment provided by the present invention; In the figure, 1. chair frame seat; 2. chair frame; 3. chair frame drive assembly; 3-1. upper connecting rod of chair frame; 3-2. lower connecting rod of chair frame; 3-3. intermediate rotating shaft; 3-4. motor; 3-5. cross beam; 3-6. crank; 3-7. telescopic push rod; 4. seat plate assembly; 4-1. seat plate and backrest assembly; 4-11. backrest frame; 4-12. backrest frame support rod; 4-13. seat plate frame; 4-14. seat plate support rod; 4-15. first guide groove; 4-16. first card slot; 4-18. backrest; 4-19. seat plate; 4-2. armrest assembly; 4-21. armrest; 4-22. armrest support rod; 4-23. second guide groove; 4-24. second card slot; 4-25. second guiding card rod; 5. triangular drive wheel assembly; 5-1. triangular wheel mechanism; 5-11. base bracket; 5-12. drive shaft; 5-13. triangular wheel frame; 5-131. through hole; 5-14. roller; 5-2. drive mechanism; 5-21. motor; 5-22. clutch; 5-23. intermediate shaft; 5-24. chain; 5-25. sprocket; 5-3. braking mechanism; 5-31. brake handle; 5-32. first brake wire; 5-33. crank; 5-34. second brake wire; 5-35. lever structure; 5-36. brake frame; 5-37. return spring; 5-38. brake convex rod; 5-39. brake groove; 6. traveling wheel assembly; 6-1. traveling wheel bracket; 6-2. foot brake; 6-3. universal wheel; 7. pedal assembly; 7-1. pedal bracket; 7-11. telescopic section; 7-12. support section; 7-121. vertical section; 7-122. horizontal section; 7-2. pedal; 7-3. connecting rod; 7-4. drive cylinder; 7-5. pedal support plate; 7-6. guide wheel; 8. hand grip; 9. button. Detailed implementation manners

[0024] The following combines the attached Figure 1-13The principles and features of the present invention are described. The examples given are only used to explain the present invention and are not intended to limit the scope of the present invention. In the following paragraphs, the present invention will be described more specifically by way of example with reference to the accompanying drawings. The advantages and features of the present invention will become clearer according to the following description and claims. It should be noted that the drawings are in a very simplified form and are not drawn to precise scale, and are only used to facilitate and clearly assist in explaining the purpose of the embodiments of the present invention.

[0025] It should be noted that when a component is referred to as being "fixed to" another component, it can be directly on the other component or there can also be an intermediate component. When a component is considered to be "connected to" another component, it can be directly connected to the other component or there may be an intermediate component at the same time. When a component is considered to be "disposed on" another component, it can be directly disposed on the other component or there may be an intermediate component at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

[0026] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which the present invention belongs. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0027] Referring to Figures 1 to 13 as shown, the present invention provides a deformable multi-functional obstacle-crossing vehicle.

[0028] Embodiment 1 As Figure 1 、 10 、11, 12 shown, it includes a deformable bracket, including a chair frame base 1, a chair frame 2 and a chair frame drive assembly 3. The front end of the chair frame is rotatably connected to the chair frame base, and the chair frame drive assembly is connected between the middle of the chair frame and the chair frame base. Under the action of the chair frame drive assembly, the chair frame has two states on the chair frame base, fitting on the chair frame base or forming a certain angle with the chair frame base; a handgrip 8 is provided at the rear end of the chair frame; a seat board assembly 4, which is installed on the chair frame. According to the usage requirements, the seat board assembly is adjusted to a seat state or a flat state; a triangular drive wheel assembly 5 and a traveling wheel assembly 6. The triangular drive wheel assembly is provided at the front bottom of the chair frame base and has a ladder climbing mode and a flat road traveling mode; the traveling wheel assembly is provided at the rear bottom of the wheelchair seat; a footrest assembly 7, which is provided at the front end of the chair frame and has two states of extending out of the chair frame and retracting into the chair frame.

[0029] In this application, a deformable bracket is provided, and a triangular drive wheel assembly is provided at the bottom of the chair frame seat; when the vehicle is traveling on a flat road, the triangular drive wheel assembly switches to the flat road traveling mode, and the chair frame is adjusted to form a certain angle with the chair frame seat; when the vehicle is climbing stairs, the chair frame is adjusted to fit on the chair frame seat, and the triangular wheel assembly switches to the stair climbing mode. In addition, a seat plate assembly and a footrest plate assembly are provided on the chair frame, and the deformation of the seat plate assembly and the footrest plate assembly is used to meet the needs of carrying people and goods.

[0030] Embodiment 2 The structure and principle of Embodiment 2 are similar to those of Embodiment 1. The difference is that: as Figure 2 shown, a preferred structural form of the chair frame drive assembly is given. The chair frame drive assembly includes an upper chair frame link 3-1, a lower chair frame link 3-2, an intermediate rotating shaft 3-3, a gear set (not shown in the figure and located in the motor mounting box), and a motor 3-5; upper chair frame links and lower chair frame links are provided on both sides of the chair frame. One end of the upper chair frame link is rotatably connected to the chair frame through a rotating shaft. The other end of the upper chair frame link and one end of the lower chair frame link are connected through a rotating shaft. The other ends of the lower chair frame links on both sides are fixedly connected to the intermediate rotating shaft; the intermediate rotating shaft is rotatably connected to the chair frame seat; a cross beam 3-5 is fixedly provided on the chair frame seat, and the motor is fixedly installed on the cross beam; the output shaft of the motor is connected to the driving wheel of the gear set, and the driven wheel of the gear set is fixed on the intermediate rotating shaft, and the driving wheel and the driven wheel of the gear set mesh with each other.

[0031] In this embodiment, the motor is indirectly fixed to the chair frame seat through the cross beam. The driving wheel of the gear set is rotated by the motor, and the intermediate rotating shaft is indirectly driven to rotate by the driven wheel. During the rotation of the intermediate rotating shaft, when the upper chair frame link and the lower chair frame link are on the same straight line, the angle between the chair frame and the chair frame seat is the largest, and the seat plate assembly is adjusted to the highest position; then, the intermediate rotating shaft rotates, and the lower chair frame link rotates backward. When the position of the rotating shaft at the connection of the upper chair frame link and the lower chair frame link is at a certain height below the height of the intermediate rotating shaft, the chair frame fits onto the chair frame seat. Based on the above chair frame drive assembly, the morphological changes of the deformable bracket during traveling on a flat road or climbing stairs are completed.

[0032] Embodiment 3 The structure and principle of Embodiment 3 are similar to those of Embodiment 1. The difference is that: as Figure 3As shown, a preferred structural form of the chair frame drive assembly is given. The chair frame drive assembly includes an upper link 3-1 of the chair frame, a lower link 3-2 of the chair frame, an intermediate rotating shaft 3-3, a crank 3-6, and a telescopic push rod 3-7. The upper link and the lower link of the chair frame are arranged on both sides of the chair frame. One end of the upper link of the chair frame is rotatably connected to the chair frame through a rotating shaft. The other end of the upper link of the chair frame is connected to one end of the lower link of the chair frame through a rotating shaft. The other ends of the lower links of the chair frame on both sides are fixedly connected to the intermediate rotating shaft. The intermediate rotating shaft is rotatably connected to the chair frame seat. One end of the crank is fixed to the intermediate rotating shaft. The other end of the crank is connected to the end of the telescopic push rod through a rotating shaft. The other end of the telescopic push rod is connected to the chair frame seat through a rotating shaft. The boundary points of the rotation trajectory range driven by the telescopic push rod respectively correspond to: the lower link of the chair frame and the upper beam of the chair frame are on the same straight line, and the position of the rotating shaft at the connection of the upper link and the lower link of the chair frame is below the height of the intermediate rotating shaft, and the chair frame and the chair frame seat are in contact.

[0033] In this embodiment, the telescopic push rod can adopt existing telescopic components such as an electric push rod, a hydraulic cylinder, and a cylinder. Similar to the first chair frame drive assembly described in this application, the angle between the chair frame and the chair frame seat is adjusted by driving the rotation of the intermediate rotating shaft. However, in this embodiment, by controlling the stroke of the telescopic push rod, the purpose of pushing the crank to rotate is achieved, indirectly driving the rotation of the intermediate rotating shaft. In this application, according to the position of the crank, the installation position of the telescopic push rod on the chair frame seat also changes. As shown in the figure, the telescopic push rod can be arranged on the chair frame seat behind the intermediate rotating shaft; it can also be arranged on the chair frame seat at the bottom of the intermediate rotating shaft.

[0034] Embodiment 4 The structure and principle of Embodiment 4 are similar to those of Embodiment 1. The difference is that: as Figures 4 to 6 shown, a first structural form of the seat plate assembly is given. The seat plate assembly includes a seat plate backrest assembly 4-1 and an armrest assembly 4-2. The seat back assembly includes a backrest frame 4-11, a backrest frame strut 4-12, a seat plate frame 4-13, and a seat plate strut 4-14; both sides of the backrest frame and the seat plate frame are connected to the chair frame through rotating shafts, and the rotating shafts at the connection between the backrest frame and the chair frame and the rotating shafts at the connection between the seat plate frame and the chair frame are located on the same straight line parallel to the length direction of the chair frame; the seat plate frame is located in front of the backrest frame, and a set gap is left between the two; at least one backrest frame strut is connected between the backrest frame and the seat plate frame, one end of the backrest frame strut is slidably connected to the end of the backrest frame close to the seat plate frame, and the other end of the backrest frame strut and one end of the seat plate frame are connected through a rotating shaft; at least one seat plate strut is connected between the seat plate frame and the chair frame or between the seat plate frame and the chair seat, one end of the seat plate strut is connected to the front end of the seat plate frame through a rotating shaft, a first guide groove 4-15 and a first card slot 4-16 communicating with the first guide groove are provided on the other side of the seat plate strut, the first card slot is located at the end of the first guide groove away from the seat plate frame, and a first guiding and clamping rod (not shown in the figure) is provided on the chair frame or the chair seat, and the first guiding and clamping rod is slidably connected in the first guide groove and the first card slot; The armrest assembly includes an armrest 4-21 and an armrest strut 4-22, one end of the armrest is connected to the chair frame through a rotating shaft, one end of the armrest strut is connected to the middle of the armrest through a rotating shaft, a second guide groove 4-23 and a second card slot 4-24 communicating with the second guide groove are provided on the other side of the armrest strut, and the first card slot is located at the end of the first guide groove away from the armrest; a second guiding and clamping rod 4-25 is fixedly provided on the chair frame, and the second guiding and clamping rod is slidably connected in the second guide groove and the second card slot.

[0035] In this embodiment, the backrest frame, the backrest frame strut, the seat plate frame, and the seat plate strut form a linkage structure. When the first guiding and clamping rod is at different positions in the first guide groove, the above-mentioned linkage mechanism is in different states. When the first guiding and clamping rod is placed in the first guide groove, due to the self-weight of the seat plate frame or the cargo being pressed on the seat plate frame, the first guiding and clamping rod slides to one end of the first guide groove away from the first card slot; at this time, the seat plate frame fits on the chair frame, and the backrest strut slides into the interior of the backrest frame; the backrest frame and the seat plate frame form a load-carrying plane on the chair frame. To ensure the stability of the load-carrying plane, matching positioning pin holes can also be provided between the seat plate frame and the chair seat. After the positioning pins pass through the positioning pin holes of the seat plate frame and the chair seat at the same time, the fixation of the two is completed.

[0036] When the first guiding rod is placed in the first card slot, the seat plate frame, the chair frame, and the seat plate strut form a stable triangular structure; during this process, the backrest frame strut slides out of the inner cavity of the backrest frame, and the backrest frame strut and the backrest frame flip under the action of the seat plate frame; at this time, the whole formed by the backrest frame and the backrest frame strut, the chair frame, and the seat plate frame form a stable triangular structure.

[0037] Inside the armrest assembly, when the second guide rod is placed in the second guide groove, it fits on the chair frame due to the gravity of the armrest itself. When the second guide rod is placed in the second card slot, a stable triangular structure is formed by the armrest, the armrest support rod, and the chair frame.

[0038] Preferably, the rotating shaft on which the seat board is mounted on the chair frame is used as the second guide rod.

[0039] Embodiment 5 The structure and principle of Embodiment 5 are similar to those of Embodiment 1. The difference is that: a second structural form of the seat board assembly is given. The seat board assembly includes an armrest assembly and a seat board backrest assembly, which are not shown in the figures of this embodiment; The seat back assembly includes a backrest frame, a backrest frame support rod, a seat board frame, and a first telescopic rod; both sides of the backrest frame and the seat board frame are connected to the chair frame through rotating shafts, and the rotating shafts at the connection between the backrest frame and the chair frame and the rotating shafts at the connection between the seat board frame and the chair frame are located on the same straight line parallel to the length direction of the chair frame; the seat board frame is located in front of the backrest frame, and a set gap is left between them; at least one backrest frame support rod is connected between the backrest frame and the seat board frame. One end of the backrest frame support rod is slidably connected to the end of the backrest frame close to the seat board frame, and the other end of the backrest frame support rod and one end of the seat board frame are connected by a rotating shaft; both ends of the first telescopic rod are respectively connected to the seat board frame and the chair frame, or the seat board frame and the chair frame seat through rotating shafts; The armrest assembly includes an armrest and a second telescopic rod. One end of the armrest is connected to the chair frame through a rotating shaft, one end of the second telescopic rod is connected to the middle of the armrest through a rotating shaft, and the other end of the second telescopic rod is connected to the chair frame seat through a rotating shaft.

[0040] In this embodiment, it is similar to the above structural form of the seat back assembly. The difference is that in this embodiment, the first telescopic rod and the second telescopic rod are respectively used to control the morphological changes of the seat back assembly and the armrest assembly. The first and second telescopic rods can use existing telescopic rod components such as oil cylinders, air cylinders, and electric push rods.

[0041] In Embodiments 4 and 5, a backrest 4-18 is detachably provided on the backrest frame, and a seat board 4-19 is detachably provided on the seat board frame; both the backrest and the seat board have two sides, a cargo-carrying surface and a passenger-carrying surface, and the upward surfaces of the seat board and the backrest can be selected according to requirements.

[0042] In Embodiments 1-5, as Figure 7 、 8 shown, a preferred structural form of the triangular drive wheel assembly is given. Specifically, the triangular drive wheel assembly includes a triangular wheel mechanism 5-1, a drive mechanism 5-2, and a braking mechanism 5-3; The triangular wheel mechanism includes a base bracket 5-11 fixed to the front side of the bottom of the chair frame seat, a drive shaft 5-12 rotatably connected to the base bracket, triangular wheel brackets 5-13 fixed to both ends of the drive shaft, and rollers 5-14 circumferentially distributed on the triangular wheel brackets; The drive mechanism includes a motor 5-21 fixed to the base bracket, a clutch 5-22 connected to the output shaft of the motor, an intermediate shaft 5-23 connected to the other end of the clutch, a chain 5-24 and a sprocket 5-25 connected between the intermediate shaft and the drive shaft; A handgrip 8 is provided at the end of the chair frame away from the chair frame seat, and buttons 9 for controlling the opening of the motor, switching between the ladder climbing mode and the flat road traveling mode, and other required functions are provided on the handgrip.

[0043] The braking mechanism restricts the self-rotation of the rollers as required, and the braking mechanism adopts an existing structure; In the embodiment shown in the figure, a preferred one is given, which includes a brake handle 5-31, a first brake wire 5-32, a crank 5-33, a second brake wire 5-34, a lever structure 5-35, and a brake frame 5-36; An installation bracket is provided at the bottom of the chair frame seat, and the crank is rotatably connected to the installation bracket; The first brake wire is connected between the brake handle and the crank, and when the brake handle is pinched, the crank is driven to rotate through the first brake wire. The lever assembly is installed on the base bracket, and the second brake wire is connected to one end of the lever of the lever assembly and the crank; The brake frame is slidably connected to the drive shaft, and the brake frame rotates together with the triangular wheel bracket; When the crank rotates, the other end of the lever is driven to tilt through the second brake wire, thereby pushing the brake frame to move towards the triangular wheel bracket. A return spring 5-37 is provided between the brake frame and the triangular wheel bracket. After the brake handle is released, the return spring drives the brake frame to move in the opposite direction, thereby indirectly driving the crank to reverse. According to the position of the rollers, through holes 5-131 are provided on the triangular wheel brackets, brake convex rods 5-38 are provided on the brake frames, and brake grooves 8-39 are provided on the rollers.

[0044] In the above-mentioned triangular drive wheel assembly, in the flat road traveling mode, the braking mechanism and the drive mechanism do not act, and the triangular wheel mechanism is supported by two rollers and travels on the ground. In the ladder climbing mode, the braking mechanism acts to lock the rollers of the triangular wheel mechanism to prevent them from rotating during the process of climbing up and down the ladder, improving the safety of the vehicle when climbing the ladder; In addition, the drive mechanism operates, and by driving the rotation of the drive shaft, the rotation of the triangular wheel bracket is indirectly driven, thereby realizing climbing up and down the ladder and achieving the purpose of labor saving.

[0045] Preferably, a level is provided on the chair frame seat, and the level is connected to the clutch and controls the on-off of the clutch. When the vehicle is in the stage of climbing the ladder, the level emits a signal, and the clutch is always in the power connection state.

[0046] In Embodiments 1-5, as Figure 1 、 4, as shown in Figures 9, 10, 11, and 12, a preferred footrest assembly is provided. The footrest assembly includes a footrest bracket 7-1, a footrest 7-2, a connecting rod 7-3, and a driving cylinder 7-4. There are two parallel slideways in the seat frame along the vehicle's forward direction, and through slots are provided on the opposite sides of the rear sections of the two slideways; the footrest bracket includes a telescopic section 7-11 and a support section 7-12, and the support section is connected to the front end of the telescopic section through a rotating shaft; the telescopic section is placed in the slideway, and the inner ends of the telescopic sections in the two slideways are fixedly connected through the connecting rod passing through the through slots; one end of the driving cylinder is connected to the seat frame, and the other end of the driving cylinder is connected to the connecting rod; when the connecting rod runs to the rear end of the through slot, the telescopic section is completely placed in the slideway and the support section is partially placed in the slideway; when the connecting rod runs to the front end of the through slot, the telescopic section partially extends out of the slideway and the support section is completely outside the slideway; the footrest is installed between the two side support sections.

[0047] As Figure 13 shown, a preferred footrest assembly is also provided. The footrest assembly includes a footrest bracket, a footrest, and a driving cylinder. There are two parallel slideways in the seat frame along the vehicle's forward direction; the footrest bracket includes a telescopic section and a support section, and the support section is connected to the front end of the telescopic section through a rotating shaft; the telescopic section is placed in the slideway, and the inner ends of the telescopic sections in the two slideways are fixedly connected through the connecting rod passing through the through slots; the driving cylinder is placed inside the slideway, and the driving cylinder is connected between the inner wall of the slideway and the inner end of the telescopic section; when the driving cylinder is retracted to the shortest, the telescopic section is completely placed in the slideway and the support section is partially placed in the slideway; when the driving cylinder extends to the longest, the telescopic section partially extends out of the slideway and the support section is completely outside the slideway; the footrest is installed between the two side support sections.

[0048] The driving cylinder adopts existing telescopic power components such as oil cylinders, air cylinders, and electric push rods. Additionally, a manual adjustment mode can also be adopted. For example, multiple pin holes are provided on the slideway, and positioning holes are provided on the telescopic section. After adjusting the position of the telescopic end, the pin is inserted into different pin holes.

[0049] In the above structure, when the vehicle is used for carrying people, the driving cylinder pushes out the telescopic section of the footrest bracket and all of the support section out of the slideway; when the vehicle is used for carrying goods, the driving cylinder retracts all of the telescopic section of the footrest bracket and part of the support section into the slideway.

[0050] To facilitate the support section to slide into the slideway, a footrest support plate 7-5 is provided at the bottom of the front end outlet of the slideway, a guide wheel 7-6 matching the footrest support plate is provided on the support section, and an arc-shaped guide rail is provided on the footrest support plate; during the process of the support section sliding into the slideway along with the telescopic section, the footrest support plate contacts the bottom of the support section and drives the straight rod section to rotate around its rotating shaft connection with the telescopic section; The support section adopts an L-shaped structure. The footrest is rotatably connected to the joint of the vertical section 7-121 and the horizontal section 7-122 of the L-shaped structure, and limiting structures are provided on both the horizontal section and the vertical section; according to requirements, the footrest is fixed on the horizontal section or the vertical section by using the limiting structure.

[0051] In the above structure, when the vehicle is used for carrying people, the footrest is flipped to the horizontal section and fixed on the horizontal section by the limiting structure. At this time, the footrest is used to support the user's feet. When the vehicle is used for carrying goods, the footrest is fixed on the vertical section by the limiting structure. At this time, the footrest fills the space between the horizontal section and the seat plate assembly, so that the footrest and the seat plate assembly jointly form a cargo plane; the horizontal section serves as a front baffle to prevent the goods from sliding off the cargo plane.

[0052] In Embodiments 1-5, the traveling wheel assembly includes a traveling wheel bracket 6-1 fixed to the rear side of the bottom of the chair frame seat, and a universal wheel 6-3 with a foot brake 6-2 connected to the bottom of the traveling wheel bracket. Braking is performed by the foot brake of the universal wheel in the flat road traveling mode, and braking is performed by the triangular wheel drive assembly in the stair climbing mode.

[0053] The above is only the preferred embodiment of the present invention, and it does not impose any form of limitation on the present invention; any ordinary technician in the industry can smoothly implement the present invention according to the illustrations in the specification and the above description; however, any equivalent changes made by those skilled in the art within the scope of the technical solution of the present invention by using the technical content disclosed above, such as minor modifications, decorations, and evolutions, are equivalent embodiments of the present invention; at the same time, any equivalent changes, modifications, and evolutions made to the above embodiments based on the essence of the present invention still fall within the protection scope of the technical solution of the present invention.

Claims

1. A deformable multifunctional obstacle-crossing vehicle, characterized by: include The deformable bracket includes a chair frame seat, a chair frame and a chair frame driving assembly. The front end of the chair frame is rotatably connected to the chair frame seat. The chair frame driving assembly is connected between the middle of the chair frame and the chair frame seat. Under the action of the chair frame driving assembly, the chair frame has two states on the chair frame seat, which is to fit on the chair frame seat or to form a certain angle with the chair frame seat. The seat plate assembly is installed on the chair frame. According to the use requirements, the seat plate assembly is adjusted to a seat state or a flat plate state; The triangular drive wheel assembly and the traveling wheel assembly, the triangular drive wheel assembly is arranged at the front bottom of the chair frame seat, and has a step climbing mode and a flat road traveling mode; the traveling wheel assembly is arranged at the rear bottom of the wheelchair seat; The foot pedal assembly is arranged at the front end of the chair frame and has two states: extending out of the chair frame and retracting into the chair frame.

2. The deformable multifunctional obstacle-crossing vehicle according to claim 1, characterized in that: The chair frame driving assembly includes an upper connecting rod, a lower connecting rod, an intermediate rotating shaft, a gear set and a motor; an upper connecting rod and a lower connecting rod are arranged on both sides of the chair frame, one end of the upper connecting rod is rotatably connected to the chair frame through a rotating shaft, the other end of the upper connecting rod is connected to one end of the lower connecting rod through a rotating shaft, and the other end of the lower connecting rods on both sides are fixedly connected to the intermediate rotating shaft; the intermediate rotating shaft is rotatably connected to the chair frame seat; a crossbeam is fixedly provided on the chair frame seat, and the motor is fixedly installed on the crossbeam; the output shaft of the motor is connected to the driving wheel of the gear set, the driven wheel of the gear set is fixed on the intermediate rotating shaft, and the driving wheel and the driven wheel of the gear set are meshed with each other.

3. The deformable multifunctional obstacle-crossing vehicle according to claim 1, characterized in that: The chair frame driving assembly includes an upper connecting rod, a lower connecting rod, an intermediate rotating shaft, a crank and a telescopic push rod. The upper connecting rod and the lower connecting rod are arranged on both sides of the chair frame. One end of the upper connecting rod is rotatably connected to the chair frame through a rotating shaft, and the other end of the upper connecting rod is connected to one end of the lower connecting rod through a rotating shaft, and the other ends of the lower connecting rods on both sides are fixedly connected to the intermediate rotating shaft; the intermediate rotating shaft is rotatably connected to the chair frame seat; one end of the crank is fixed to the intermediate rotating shaft, and the other end of the crank is connected to the end of the telescopic push rod through a rotating shaft, and the other end of the telescopic push rod is connected to the chair frame seat through a rotating shaft; the boundary points of the rotation trajectory range of the telescopic push rod driving the crank correspond to: the lower connecting rod and the upper beam of the chair frame are on the same straight line, the position of the rotating shaft at the connection between the upper connecting rod and the lower connecting rod of the chair frame is located below the height of the intermediate rotating shaft, and the chair frame and the chair frame seat are in close contact.

4. The deformable multifunctional obstacle-crossing vehicle according to claim 1, characterized in that: The seat panel assembly includes an armrest assembly and a seat panel backrest assembly; The seat back assembly includes a backrest frame, a backrest frame support rod, a seat plate frame, and a seat plate support rod; both sides of the backrest frame and the seat plate frame are connected to the chair frame through a rotating shaft, and the rotating shaft at the connection between the backrest frame and the chair frame and the rotating shaft at the connection between the seat plate frame and the chair frame are located on the same straight line parallel to the length direction of the chair frame; the seat plate frame is located at the front side of the backrest frame, and a set gap is left between the two; at least one backrest frame support rod is connected between the backrest frame and the seat plate frame, and one end of the backrest frame support rod is slidably connected to the end of the backrest frame close to the seat plate frame The backrest frame has a head, and the other end of the backrest frame support rod is connected to one end of the seat plate frame through a rotating shaft; at least one seat plate support rod is connected between the seat plate frame and the chair frame, or between the seat plate frame and the chair frame seat, one end of the seat plate support rod is connected to the front end of the seat plate frame through a rotating shaft, and the other side of the seat plate support rod is provided with a first guide groove and a first clamping groove connected to the first guide groove, the first clamping groove is located at the end of the first guide groove away from the seat plate frame, and a first guide clamping rod is provided on the chair frame or the chair frame seat, and the first guide clamping rod is slidably connected in the first guide groove and the first clamping groove; The armrest assembly includes an armrest and an armrest support rod, one end of the armrest is connected to the chair frame through a rotating shaft, one end of the armrest support rod is connected to the middle part of the armrest through a rotating shaft, the other side of the armrest support rod is provided with a second guide groove and a second clamping groove connected to the second guide groove, the first clamping groove is located at the end of the first guide groove away from the armrest; a second guide clamping rod is fixedly provided on the chair frame, and the second guide clamping rod is slidably connected in the second guide groove and the second clamping groove.

5. The deformable multifunctional obstacle-crossing vehicle according to claim 1, characterized in that: The seat panel assembly includes an armrest assembly and a seat panel backrest assembly; The seat back assembly includes a backrest frame, a backrest frame support rod, a seat plate frame, and a first telescopic rod; both sides of the backrest frame and the seat plate frame are connected to the chair frame through a rotating shaft, and the rotating shaft at the connection between the backrest frame and the chair frame and the rotating shaft at the connection between the seat plate frame and the chair frame are located on the same straight line parallel to the length direction of the chair frame; the seat plate frame is located at the front side of the backrest frame, and a set gap is left between the two; at least one backrest frame support rod is connected between the backrest frame and the seat plate frame, one end of the backrest frame support rod is slidably connected to the end of the backrest frame close to the seat plate frame, and the other end of the backrest frame support rod is connected to one end of the seat plate frame through a rotating shaft; the two ends of the first telescopic rod are respectively connected to the seat plate frame and the chair frame, or the seat plate frame and the chair frame seat through a rotating shaft; The armrest assembly comprises an armrest and a second telescopic rod, one end of the armrest is connected to the chair frame through a rotating shaft, one end of the second telescopic rod is connected to the middle part of the armrest through the rotating shaft, and the other end of the second telescopic rod is connected to the chair frame seat through the rotating shaft.

6. The deformable multifunctional obstacle-crossing vehicle according to claim 4 or 5, characterized in that: A backrest is detachably provided on the backrest frame, and a seat plate is detachably provided on the seat plate frame; both the backrest and the seat plate are provided with two sides, a cargo surface and a passenger surface, and the upward surfaces of the seat plate and the backrest are adjusted according to needs.

7. The deformable multifunctional obstacle-crossing vehicle according to claim 1, characterized in that: The triangular driving wheel assembly includes a triangular wheel mechanism, a driving mechanism and a braking mechanism; The triangular wheel mechanism includes a base bracket fixed to the front side of the bottom of the chair frame, a driving shaft rotatably connected to the base bracket, a triangular wheel frame fixed to both ends of the driving shaft, and rollers circumferentially distributed on the triangular wheel frame; The driving mechanism includes a motor fixed to the base bracket, a clutch connected to the output shaft of the motor, an intermediate shaft connected to the other end of the clutch, and a chain and a sprocket connected between the intermediate shaft and the driving shaft; The braking mechanism limits the self-rotation of the roller according to the demand, and the braking mechanism adopts the existing structure.

8. The deformable multifunctional obstacle-crossing vehicle according to claim 1, characterized in that: The traveling wheel assembly comprises a traveling wheel bracket fixed to the rear side of the bottom of the chair frame seat, and a universal wheel with a foot brake connected to the bottom of the traveling wheel bracket.

9. The deformable multifunctional obstacle-crossing vehicle according to claim 1, characterized in that: The pedal assembly includes a pedal bracket, a pedal, a connecting rod and a driving cylinder. Two parallel slideways are arranged in the seat frame along the forward direction of the vehicle, and through grooves are arranged on the opposite sides of the rear sections of the two slideways; the pedal bracket includes a telescopic section and a supporting section, and the supporting section is connected to the front end of the telescopic section through a rotating shaft; the telescopic section is placed in the slideway, and the inner ends of the telescopic sections in the two slideways are fixedly connected through the through groove by a connecting rod; one end of the driving cylinder is connected to the seat frame, and the other end of the driving cylinder is connected to the connecting rod; when the connecting rod runs to the rear end of the through groove, the telescopic section is completely placed in the slideway, and the supporting section is partially placed in the slideway; when the connecting rod runs to the front end of the through groove, the telescopic section partially extends out of the slideway, and the supporting section is completely located outside the slideway; the pedal is installed between the supporting sections on both sides; Alternatively, the foot pedal assembly includes a foot pedal bracket, a foot pedal, and a driving cylinder, and two parallel slides are provided in the seat frame along the forward direction of the vehicle; the foot pedal bracket includes a telescopic section and a supporting section, and the supporting section is connected to the front end of the telescopic section by a rotating shaft; the telescopic section is placed in the slide, and the inner ends of the telescopic sections in the two slides are fixedly connected by connecting rods passing through through grooves; the driving cylinder is placed inside the slide, and the driving cylinder is connected between the inner wall of the slide and the inner end of the telescopic section; when the driving cylinder is retracted to the shortest, the telescopic section is completely placed in the slide, and the supporting section is partially placed in the slide; when the driving cylinder is extended to the longest, the telescopic section partially extends out of the slide, and the supporting section is completely located outside the slide; the foot pedal is installed between the supporting sections on both sides.

10. The deformable multifunctional obstacle-crossing vehicle according to claim 9, characterized in that: A foot support plate is provided at the bottom of the front end exit of the slideway, a guide wheel matching the foot support plate is provided on the support section, and an arc guide rail is provided on the foot support plate; when the support section slides into the slideway along with the telescopic section, the foot support plate contacts the bottom of the support section and drives the straight rod section to rotate around the connection between the straight rod section and the rotating shaft of the telescopic section; The supporting section adopts an L-shaped structure, and the foot pedal is rotatably connected to the connection between the vertical section and the horizontal section of the L-shaped structure, and a limiting structure is provided on both the horizontal section and the vertical section; according to needs, the foot pedal is fixed to the horizontal section or the vertical section using the limiting structure.

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