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 application relates to the technical field of wheelchairs, in particular to a deformable multifunctional obstacle carrier. BACKGROUND

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

[0003] In addition, as a basic carrier tool, the trolley is also a tool used daily in the family. The functions and structures of the trolley and the wheelchair are similar, and the working conditions of the trolley and the form conditions of the wheelchair have a lot of overlap. Both of them need to occupy a large space for storage.

[0004] It is urgent to develop a carrier that can be used as a wheelchair and a trolley, and also has the function of climbing stairs. Realizing one thing with multiple functions can save the carrier's space in the family house and achieve multiple functions. SUMMARY

[0005] In view of the above defects in the prior art, a deformable multifunctional obstacle carrier is provided, which has the functions of wheelchair and trolley, and also has the functions of climbing stairs and driving on flat roads.

[0006] The technical scheme adopted by the present application to solve the above technical problems is:

[0007] The deformable multifunctional obstacle carrier comprises

[0008] The transformation support comprises 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 part 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, i.e. being attached to the chair frame seat or being at a certain angle with the chair frame seat. A hand grip is arranged at the rear end of the chair frame.

[0009] The seat plate assembly is installed on the chair frame. According to the use requirement, the seat plate assembly is adjusted to a seat state or a flat plate state.

[0010] The triangular driving wheel assembly is arranged at the bottom of the front end of the chair frame seat and has a stair climbing mode and a flat road driving mode. The running wheel assembly is arranged at the bottom of the rear end of the wheelchair seat.

[0011] The footboard assembly is arranged 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.

[0012] According to the technical scheme, the chair frame driving assembly comprises an upper chair frame connecting rod, a lower chair frame connecting rod, a middle rotating shaft, a gear set and a motor; the upper chair frame connecting rod and the lower chair frame connecting rod are arranged on both sides of the chair frame, one end of the upper chair frame connecting rod is rotatably connected to the chair frame through a rotating shaft, the other end of the upper chair frame connecting rod and one end of the lower chair frame connecting rod are connected through a rotating shaft, and the other ends of the lower chair frame connecting rods on both sides are fixedly connected to the middle rotating shaft; the middle rotating shaft is rotatably connected to the chair seat; a cross beam is fixedly arranged on the chair seat, and the motor is fixedly installed on the cross beam; the output shaft of the motor is connected to the driving gear of the gear set, the driven gear of the gear set is fixed to the middle rotating shaft, and the driving gear and the driven gear of the gear set are meshed with each other.

[0013] According to the technical scheme, the chair frame driving assembly comprises an upper chair frame connecting rod, a lower chair frame connecting rod, a middle rotating shaft, a crank and a telescopic push rod; the upper chair frame connecting rod and the lower chair frame connecting rod are arranged on both sides of the chair frame, one end of the upper chair frame connecting rod is rotatably connected to the chair frame through a rotating shaft, the other end of the upper chair frame connecting rod and one end of the lower chair frame connecting rod are connected through a rotating shaft, and the other ends of the lower chair frame connecting rods on both sides are fixedly connected to the middle rotating shaft; the middle rotating shaft is rotatably connected to the chair seat; one end of the crank is fixed to the middle rotating shaft, the other end of the crank and the end of the telescopic push rod are connected through a rotating shaft, and the other end of the telescopic push rod is connected to the chair seat through a rotating shaft; the boundary points of the rotating track range of the crank driven by the telescopic push rod correspond to: the lower chair frame connecting rod and the upper chair frame connecting rod are on the same straight line, the position of the rotating shaft at the connection between the upper chair frame connecting rod and the lower chair frame connecting rod is below the middle rotating shaft, and the chair frame and the chair seat are in close contact.

[0014] According to the technical scheme, the seat plate assembly comprises an armrest assembly and a seat plate backrest assembly.

[0015] The seat backrest assembly comprises a backrest frame, a backrest frame support rod, a seat plate frame and a seat plate support rod; the backrest frame and the seat plate frame are rotatably connected to the chair frame through rotating shafts on both sides, and the rotating shafts at the connections between the backrest frame and the chair frame and 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 on the front side of the backrest frame, and a set gap is left between the seat plate frame and the backrest frame; 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; 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 seat, one end of the seat plate support rod is connected to the front end of the seat plate frame through a rotating shaft, the other side of the seat plate support rod is provided with a first guide slot and a first clamping slot in communication with the first guide slot, the first clamping slot is located at the end of the first guide slot away from the seat plate frame, and a first guide clamping rod is slidably connected in the first guide slot and the first clamping slot;

[0016] The armrest assembly comprises an armrest and an armrest support rod, one end of the armrest is connected to the chair frame via a rotating shaft, one end of the armrest support rod is connected to the middle of the armrest via a rotating shaft, the other end of the armrest support rod is provided with a second guide slot and a second clamping slot in communication with the second guide slot, and the first clamping slot is located at the end of the first guide slot away from the armrest; a second guide clamping rod is fixedly arranged on the chair frame and is slidably connected in the second guide slot and the second clamping slot.

[0017] According to the above technical scheme, the seat plate assembly comprises the armrest assembly and the seat plate backrest assembly.

[0018] The seat backrest assembly comprises a backrest frame, a backrest frame support rod, a seat plate frame and a first telescopic rod; the backrest frame and the seat plate frame are both connected to the chair frame via rotating shafts, and the rotating shafts at the connection positions of the backrest frame and the chair frame and the rotating shafts at the connection positions of 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 on the front side of the backrest frame, and a set gap is left between the seat plate frame and the backrest frame; 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 via a rotating shaft; the two ends of the first telescopic rod are connected to the seat plate frame and the chair frame or the seat plate frame and the chair seat via rotating shafts.

[0019] The armrest assembly comprises an armrest and a second telescopic rod, one end of the armrest is connected to the chair frame via a rotating shaft, one end of the second telescopic rod is connected to the middle of the armrest via a rotating shaft, and the other end of the second telescopic rod is connected to the chair seat via a rotating shaft.

[0020] According to the above technical scheme, a backrest is detachably arranged on the backrest frame, and a seat plate is detachably arranged on the seat plate frame; the backrest and the seat plate are both provided with two surfaces, a cargo-carrying surface and a passenger-carrying surface, and the upward surface of the seat plate and the backrest can be selected according to requirements.

[0021] According to the above technical scheme, the triangular drive wheel assembly comprises a triangular wheel mechanism, a drive mechanism and a brake mechanism.

[0022] The triangular wheel mechanism comprises a base bracket fixed to the front side of the bottom of the chair seat, a drive shaft rotatably connected to the base bracket, triangular wheel frames fixed to the two ends of the drive shaft, and rollers circumferentially distributed on the triangular wheel frames.

[0023] The drive mechanism comprises 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, a chain and a chain wheel connected between the intermediate shaft and the drive shaft.

[0024] The brake mechanism limits the self-rotation of the rollers according to requirements, and the brake mechanism adopts an existing structure.

[0025] According to the technical scheme, the traveling wheel assembly comprises a traveling wheel support 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 support.

[0026] According to the technical scheme, the footrest assembly comprises a footrest support, a footrest, a connecting rod and a driving cylinder, two parallel sliding channels are arranged in the chair frame seat along the forward direction of the vehicle, and a through groove is arranged on the opposite side of the rear section of the two sliding channels; the footrest support comprises an extension section and a support section, the support section is connected to the front side end of the extension section through a rotating shaft, the extension section is arranged in the sliding channel, the inner side end of the extension section in the two sliding channels is fixedly connected through the connecting rod passing through the through groove, one end of the driving cylinder is connected to the chair frame seat, and the other end of the driving cylinder is connected to the connecting rod; when the connecting rod runs to the rear side end of the through groove, the extension section is completely arranged in the sliding channel, and the support section is partially arranged in the sliding channel; when the connecting rod runs to the front side end of the through groove, the extension section is partially arranged out of the sliding channel, and the support section is completely arranged out of the sliding channel; and the footrest is arranged between the two support sections.

[0027] Alternatively, the footrest assembly comprises a footrest support, a footrest and a driving cylinder, and two parallel sliding channels are arranged in the chair frame seat along the forward direction of the vehicle; the footrest support comprises an extension section and a support section, the support section is connected to the front side end of the extension section through a rotating shaft, the extension section is arranged in the sliding channel, and the inner side end of the extension section in the two sliding channels is fixedly connected through the connecting rod passing through the through groove; the driving cylinder is arranged in the interior of the sliding channel, and the driving cylinder is connected between the inner wall of the sliding channel and the inner side end of the extension section; when the driving cylinder is contracted to the shortest, the extension section is completely arranged in the sliding channel, and the support section is partially arranged in the sliding channel; when the driving cylinder is extended to the longest, the extension section is partially arranged out of the sliding channel, and the support section is completely arranged out of the sliding channel; and the footrest is arranged between the two support sections.

[0028] According to the technical scheme, a footrest support plate is arranged at the bottom of the outlet of the front end of the sliding channel, a guide wheel matched with the footrest support plate is arranged on the support section, and an arc-shaped guide rail is arranged on the footrest support plate; in the process that the support section slides into the sliding channel with the extension section, the footrest support plate is in contact with the bottom of the support section, and drives the straight rod section to rotate around the rotating shaft connection between the straight rod section and the extension section.

[0029] The support section adopts an L-shaped structure, the footrest is rotationally connected at the connection position between the vertical section and the horizontal section of the L-shaped structure, and limiting structures are arranged on the horizontal section and the vertical section; according to requirements, the limiting structures are used to fix the footrest on the horizontal section or the vertical section.

[0030] The present application has the following beneficial effects:

[0031] 1. A deformable support frame is installed, and a triangular drive wheel assembly is installed at the bottom of the chair frame base. When the vehicle travels on a flat road, the triangular drive wheel assembly switches to flat road travel mode, and the chair frame adjusts to form a certain angle with the chair frame base. When the vehicle climbs stairs, the chair frame adjusts to fit against the chair frame base, and the triangular wheel assembly switches to stair climbing mode. In addition, a seat plate assembly and a foot pedal assembly are installed on the chair frame. The deformation of the seat plate assembly and foot pedal assembly can meet the needs of carrying people and goods.

[0032] Based on the above structure, it not only has the functions of a wheelchair and a stroller, but also the functions of climbing stairs and walking on flat ground.

[0033] 2. Two structural forms of chair frame drive components are set up to meet the layout requirements of chair frame drive components in different scenarios and improve the applicability of the vehicle.

[0034] 3. A clutch is installed in the triangular drive wheel assembly to switch or connect the power transmission between the motor and the triangular wheel according to the road conditions of the vehicle, so as to meet the needs of the vehicle for driving on flat roads and climbing stairs.

[0035] 4. In the foot pedal assembly, a foot pedal support plate and guide wheels are installed to guide the support section of the foot pedal bracket and prevent jamming during the process of the foot pedal bracket retracting into the chair frame.

[0036] The above description is merely an overview of the technical solution of the present invention. In order to better understand the technical means of the present invention and to implement it according to the contents of the specification, the preferred embodiments of the present invention are described in detail below with reference to the accompanying drawings. Specific embodiments of the present invention are given in detail below with reference to the accompanying drawings. Attached Figure Description

[0037] The accompanying drawings, which are included to provide a further understanding of the invention and form part of this application, illustrate exemplary embodiments of the invention and are used to explain the invention, but do not constitute an undue limitation of the invention.

[0038] Figure 1 This is a structural schematic diagram of a wheelchair in a flat-ground configuration according to an embodiment of the present invention;

[0039] Figure 2 This is a schematic diagram of the structure of the chair frame drive assembly according to the first embodiment of the present invention;

[0040] Figure 3 This is a schematic diagram of the structure of the chair frame drive assembly according to the second embodiment of the present invention;

[0041] Figure 4 This is a structural schematic diagram (detailed view) of a wheelchair in a flat-ground configuration according to an embodiment of the present invention.

[0042] Figure 5Fig. 1 is a structural schematic diagram of a backrest frame support rod and a handrail support rod according to an embodiment of the present application;

[0043] Figure 6 Fig. 2 is a top view of a seat plate assembly and a foot plate assembly in a carrying state according to an embodiment of the present application;

[0044] Figure 7 Fig. 3 is a structural schematic diagram of a triangular drive wheel assembly according to an embodiment of the present application; Figure 1 ;

[0045] Figure 8 Fig. 4 is a structural schematic diagram of a triangular drive wheel assembly according to an embodiment of the present application; Figure 2 ;

[0046] Figure 9 Fig. 5 is a state change schematic diagram of a foot plate assembly according to an embodiment of the present application;

[0047] Figure 10 Fig. 6 is a structural schematic diagram of a flat cart state according to an embodiment of the present application;

[0048] Figure 11 Fig. 7 is a structural schematic diagram of a climbing stairs cart state according to an embodiment of the present application;

[0049] Figure 12 Fig. 8 is a structural schematic diagram of a climbing stairs wheelchair state according to an embodiment of the present application;

[0050] Figure 13 Fig. 9 is a structural schematic diagram of a foot plate assembly according to a second embodiment of the present application;

[0051] In the diagram, 1. Chair frame base; 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 pivot; 3-4. Motor; 3-5. Crossbeam; 3-6. Crank; 3-7. Telescopic push rod; 4. Seat assembly; 4-1. Seat and backrest assembly; 4-11. Backrest frame; 4-12. Backrest frame support rod; 4-13. Seat frame; 4-14. Seat support rod; 4-15. First guide rod. 4-16, First 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 slot; 4-25, Second guide 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 cable; 5-33. Crank; 5-34. Second brake cable; 5-35. Lever structure; 5-36. Brake bracket; 5-37. Return spring; 5-38. Brake cam; 5- 39. Brake groove; 6. Traveling wheel assembly; 6-1. Traveling wheel bracket; 6-2. Foot brake; 6-3. Caster wheel; 7. Foot pedal assembly; 7-1. Foot pedal bracket; 7-11. Telescopic section; 7-12. Support section; 7-121. Vertical section; 7-122. Horizontal section; 7-2. Foot pedal; 7-3. Connecting rod; 7-4. Drive cylinder; 7-5. Foot pedal support plate; 7-6. Guide wheel; 8. Hand handle; 9. Button. Detailed Implementation

[0052] The following is in conjunction with the appendix Figures 1-13 The principles and features of the present invention are described below. The examples given are for illustrative purposes only and are not intended to limit the scope of the invention. The invention is described more specifically in the following paragraphs by way of example with reference to the accompanying drawings. The advantages and features of the invention will become clearer from the following description and claims. It should be noted that the drawings are in a very simplified form and use non-precise proportions, and are only used to facilitate and clarify the illustration of the embodiments of the invention.

[0053] It should be noted that when a component is referred to as being "on" another component, it can be directly on the other component or intervening components can also be present. When a component is referred to as being "connected" to another component, it can be directly connected to the other component or intervening components can also be present. When a component is referred to as being "disposed on" another component, it can be directly disposed on the other component or intervening components can also be present. The terms "vertical", "horizontal", "left", "right", and similar terms as used herein are for illustrative purposes only.

[0054] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description herein is for describing particular embodiments only and is not intended to be limiting of the application. As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items.

[0055] Referring to Figures 1-13 The present application provides a deformable multi-functional obstacle carrier.

[0056] Embodiment 1

[0057] As shown in Figure 1 , 10 , 11, 12, comprising

[0058] a transformable support frame, including a chair frame base 1, a chair frame 2 and a chair frame driving assembly 3, the front end of the chair frame is rotatably connected to the chair frame base, the chair frame driving assembly is connected between the middle part of the chair frame and the chair frame base, under the action of the chair frame driving assembly, the chair frame has two states on the chair frame base, i.e. being attached to the chair frame base or being at a certain angle with the chair frame base; a hand-held handle 8 is arranged at the rear end of the chair frame;

[0059] a seat plate assembly 4, which is installed on the chair frame and is adjusted to a seat state or a flat plate state according to the use requirement;

[0060] a triangular driving wheel assembly 5 and a traveling wheel assembly 6, the triangular driving wheel assembly is arranged at the bottom of the front end of the chair frame base and has a stepped climbing mode and a flat road traveling mode, and the traveling wheel assembly is arranged at the bottom of the rear end of the wheelchair base;

[0061] a foot pedal assembly 7, which is arranged 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.

[0062] In the present application, a deformed support is arranged, and a triangular drive wheel assembly is arranged at the bottom of the chair frame seat; when the carrier is running on a flat road, the triangular drive wheel assembly is switched to a flat road running mode, and the chair frame is adjusted to a certain angle with the chair frame seat; when the carrier is climbing stairs, the chair frame is adjusted to be attached to the chair frame seat, and the triangular wheel assembly is switched to a stair climbing mode. In addition, a seat plate assembly and a foot pedal assembly are arranged on the chair frame, and the deformation of the seat plate assembly and the foot pedal assembly meets the needs of carrying people and carrying objects.

[0063] Embodiment 2

[0064] The structure and principle of embodiment 2 are close to those of embodiment 1, and the difference lies in that, as shown in Figure 2 The chair frame driving assembly includes an upper link 3-1 on the chair frame, a lower link 3-2 on the chair frame, an intermediate rotating shaft 3-3, a gear set (not shown in the figure, located in the motor mounting box), and a motor 3-5; the upper link and the lower link are arranged on both sides of the chair frame, one end of the upper link is rotatably connected to the chair frame through a rotating shaft, the other end of the upper link and one end of the lower link are connected through a rotating shaft, and the other ends of the lower 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 arranged 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 to the intermediate rotating shaft, and the driving wheel and the driven wheel of the gear set are meshed with each other.

[0065] In the present embodiment, the motor is indirectly fixed to the chair frame seat through the cross beam, the driving wheel of the gear set is driven to rotate by the motor, and the intermediate rotating shaft is indirectly driven to rotate by the driving wheel through the driven wheel. During the rotation of the intermediate rotating shaft, when the upper link and the lower link are located 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, the lower link rotates backward, and when the position of the rotating shaft at the connection between the upper link and the lower link is below the height of the intermediate rotating shaft, the chair frame is attached to the chair frame seat. Based on the above-mentioned chair frame driving assembly, the morphological changes of the deformed support during running on a flat road or during climbing stairs are completed.

[0066] Embodiment 3

[0067] The structure and principle of embodiment 3 are close to those of embodiment 1, and the difference lies in that, as shown in Figure 3As shown, a preferred structure of the chair frame driving assembly is given, which comprises the upper link 3-1, the lower link 3-2, the intermediate pivot 3-3, the crank 3-6 and the telescopic push rod 3-7. The upper link and the lower link are arranged on both sides of the chair frame, one end of the upper link is rotatably connected to the chair frame through a pivot, the other end of the upper link and one end of the lower link are connected through a pivot, the other ends of the lower links on both sides are fixedly connected to the intermediate pivot; the intermediate pivot is rotatably connected to the chair seat; one end of the crank is fixed to the intermediate pivot, the other end of the crank and the end of the telescopic push rod are connected through a pivot, the other end of the telescopic push rod is connected to the chair seat through a pivot; the boundary points of the rotation track range of the crank driven by the telescopic push rod correspond to: the lower link and the upper link are on the same straight line, the position of the pivot at the connection of the upper link and the lower link is below the height of the intermediate pivot, and the chair frame and the chair seat are attached.

[0068] In the embodiment, the telescopic push rod can adopt an existing telescopic component such as an electric push rod, a hydraulic cylinder or an air cylinder, which is similar to the first chair frame driving assembly described in the application and is used to adjust the angle between the chair frame and the chair seat by driving the rotation of the intermediate pivot. However, in the embodiment, the rotation of the crank is achieved by controlling the stroke of the telescopic push rod to indirectly drive the rotation of the intermediate pivot. According to the position of the crank, the position of the telescopic push rod on the chair seat also changes. As shown in the figure, the telescopic push rod can be arranged on the chair seat behind the intermediate pivot; it can also be arranged on the chair seat at the bottom of the intermediate pivot.

[0069] Embodiment 4

[0070] The structure and principle of embodiment 4 are similar to those of embodiment 1, and the difference lies in that, as shown in the figure, the first structure of the seat plate assembly is given, which comprises the seat plate backrest assembly 4-1 and the armrest assembly 4-2. Figures 4-6

[0071] ​The seat back assembly comprises 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 a rotating shaft, and the rotating shafts at the connection between the backrest frame and the chair frame and 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 on the front side 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 slidingly connected to the end of the backrest frame close to the seat plate frame, and the other end of the backrest frame strut is connected to one end of the seat plate frame 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, and the other side of the seat plate strut is provided with a first guide slot 4-15 and a first clamping slot 4-16 in communication with the first guide slot, the first clamping slot is located at the end of the first guide slot away from the seat plate frame, and a first guide clamping rod (not shown in the figure) is provided on the chair frame or the chair seat, and the first guide clamping rod is slidingly connected in the first guide slot and the first clamping slot;

[0072] The armrest assembly comprises 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 part of the armrest through a rotating shaft, the other side of the armrest strut is provided with a second guide slot 4-23 and a second clamping slot 4-24 in communication with the second guide slot, and the first clamping slot is located at the end of the first guide slot away from the armrest; a second guide clamping rod 4-25 is fixedly provided on the chair frame, and the second guide clamping rod is slidingly connected in the second guide slot and the second clamping slot.

[0073] In the embodiment, the backrest frame, the backrest frame strut, the seat plate frame, and the seat plate strut form a linkage structure, and the linkage structure is in different states when the first guide clamping rod is located at different positions in the first guide slot. When the first guide clamping rod is located in the first guide slot, the first guide clamping rod slides to the end of the first guide slot away from the first clamping slot due to the action of the gravity of the seat plate frame itself or the load of goods on the seat plate frame; at this time, the seat plate frame is attached to the chair frame, and the backrest strut slides into the inner cavity of the backrest frame; the backrest frame and the seat plate frame form a load plane on the chair frame. In order to ensure the stability of the load plane, a matching positioning bolt hole can also be arranged between the seat plate frame and the chair seat, and the fixation of the two is completed after the positioning bolt simultaneously passes through the positioning bolt holes of the seat plate frame and the chair seat.

[0074] When the first guide rod is located in the first clamping slot, the seat plate frame, the chair frame, and the seat plate strut form a stable triangular structure; in 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 are turned over 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.

[0075] When the second guide rod is placed in the second guide slot, the armrest is attached to the chair frame due to the gravity of the armrest itself. When the second guide rod is placed in the second clamping slot, the armrest, the armrest support rod and the chair frame form a stable triangular structure.

[0076] Preferably, the rotating shaft of the seat plate frame on the chair frame is used as the second guide rod.

[0077] Embodiment 5

[0078] The structure and principle of Embodiment 5 are similar to those of Embodiment 1, except that a second structure of the seat plate assembly is given, which includes the armrest assembly and the seat plate backrest assembly, which is not shown in the figure of this embodiment.

[0079] The seat backrest assembly includes a backrest frame, a backrest frame support rod, a seat plate frame, and a first telescopic rod. The backrest frame and the seat plate frame are connected to the chair frame through rotating shafts on both sides, 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 on the front side of the backrest frame, and a certain gap is left between them. 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 connected to the end of the backrest frame close to the seat plate frame through sliding connection, 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 connected to the seat plate frame and the chair frame or the seat plate frame and the chair seat through rotating shafts.

[0080] 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, and one end of the second telescopic rod is connected to the middle of the armrest through a rotating shaft. The other end of the second telescopic rod is connected to the chair seat through a rotating shaft.

[0081] In this embodiment, the structure of the seat backrest assembly is similar to that described above, except that the first and second telescopic rods are used to control the shape change of the seat backrest assembly and the armrest assembly, respectively. The first and second telescopic rods can be existing telescopic rod components such as oil cylinders, air cylinders, electric push rods, etc.

[0082] In Embodiments 4 and 5, a backrest 4-18 is detachably provided on the backrest frame, and a seat plate 4-19 is detachably provided on the seat plate frame. The backrest and the seat plate are both provided with two sides, a cargo-carrying side and a passenger-carrying side, and the upward side of the seat plate and the backrest is used according to the needs.

[0083] In Embodiments 1-5, as shown in Figure 7 , 8 a preferred structure of a triangular drive wheel assembly is given, which specifically includes a triangular wheel mechanism 5-1, a drive mechanism 5-2, and a brake mechanism 5-3.

[0084] The triangular wheel mechanism comprises a base support 5-11 fixed on the bottom of the front side of the chair frame seat, a driving shaft 5-12 rotatably connected to the base support, triangular wheel frames 5-13 fixed on both ends of the driving shaft, and rollers 5-14 circumferentially distributed on the triangular wheel frames;

[0085] The driving mechanism comprises a motor 5-21 fixed on the base support, 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 driving shaft; a hand grip 8 is arranged at the end of the chair frame away from the chair frame seat, and buttons 9 for controlling the start of the motor, switching between the ladder climbing mode and the flat road running mode, and other required functions are arranged on the hand grip.

[0086] The braking mechanism limits the rotation of the rollers according to the requirements, and the braking mechanism adopts an existing structure; a preferred embodiment is given in the figure, which comprises a brake handle 5-31, a first brake line 5-32, a crank 5-33, a second brake line 5-34, a lever structure 5-35, and a brake frame 5-36; a mounting bracket is arranged on the bottom of the chair frame seat, and the crank is rotatably connected to the mounting bracket; the first brake line is connected between the brake handle and the crank, and when the brake handle is pinched, the rotation of the crank is driven through the first brake line. The lever assembly is mounted on the base support, and the second brake line is connected to one end of the lever of the lever assembly and the crank; the brake frame is slidably connected to the driving shaft, and the brake frame rotates together with the triangular wheel frame; when the crank rotates, the other end of the lever is driven to lift up through the second brake line, thereby pushing the brake frame to move towards the triangular wheel frame. A return spring 5-37 is arranged between the brake frame and the triangular wheel frame, and after the brake handle is released, the return spring moves in the opposite direction by pushing the brake frame, thereby indirectly driving the crank to reverse. According to the position of the roller, a through hole 5-131 is arranged on the triangular wheel frame, a brake protruding rod 5-38 is arranged on the brake frame, and a brake groove 8-39 is arranged on the roller.

[0087] In the above-mentioned triangular driving wheel assembly, in the flat road running mode, the braking mechanism and the driving mechanism do not act, and the triangular wheel mechanism is supported by the two rollers to run on the ground. In the ladder climbing mode, the braking mechanism acts to lock the rollers of the triangular wheel mechanism to avoid rotation during the process of climbing up and down the ladder, thereby improving the safety of the ladder climbing of the carrier. In addition, the driving mechanism operates to indirectly drive the rotation of the triangular wheel frame by driving the rotation of the driving shaft, thereby realizing the climbing up and down the ladder and achieving the purpose of saving labor.

[0088] Preferably, a level meter is arranged on the chair frame seat, the level meter is connected with the clutch, and the on-off of the clutch is controlled by the level meter. When the carrier is in the stage of climbing the ladder, the level meter sends a signal, and the clutch is always in the power connection state.

[0089] In the embodiments 1-5, as Figure 1 ,4 , 9, 10, 11, 12, a preferred foot pedal assembly is given, the foot pedal assembly includes foot pedal support 7-1, foot pedal 7-2, connecting rod 7-3 and drive cylinder 7-4, provided with two parallel slide in the vehicle forward direction in the chair seat, the rear of the two slide passage is provided with a through slot on the opposite side; foot pedal support includes telescopic section 7-11, and support section 7-12, support section is connected through the pivot on the front side of the telescopic section end; telescopic section is placed in the slide, and the inner side of the telescopic section in the two slide is fixedly connected through the connecting rod through the through slot; one end of the drive cylinder is connected on the chair seat, the other end of the drive cylinder is connected on the connecting rod; when the connecting rod runs to the rear side of the through slot, the telescopic section is completely placed in the slide, and the support section is partially placed in the slide; when the connecting rod runs to the front side of the through slot, the telescopic section partially extends out of the slide, and the support section is completely located outside the slide; the foot pedal is installed between the two support sections.

[0090] As shown in Figure 13 , a preferred foot pedal assembly is also given, the foot pedal assembly includes foot pedal support, foot pedal, and drive cylinder, provided with two parallel slide in the vehicle forward direction in the chair seat; foot pedal support includes telescopic section, and support section, support section is connected through the pivot on the front side of the telescopic section end; telescopic section is placed in the slide, and the inner side of the telescopic section in the two slide is fixedly connected through the connecting rod through the through slot; drive cylinder is placed inside the slide, and the drive cylinder is connected between the slide inner wall and the inner side of the telescopic section; when the drive cylinder is retracted to the shortest, the telescopic section is completely placed in the slide, and the support section is partially placed in the slide; when the drive cylinder is stretched to the longest, the telescopic section partially extends out of the slide, and the support section is completely located outside the slide; the foot pedal is installed between the two support sections.

[0091] The drive cylinder uses existing telescopic power components such as oil cylinder, air cylinder, electric push rod, etc., and can also use manual adjustment mode, such as providing a plurality of pin holes on the slide, and providing positioning holes on the telescopic section, after adjusting the position of the telescopic end, the pin is inserted into different pin holes.

[0092] In the above structure, when the carrier is used to carry people, the drive cylinder pushes the telescopic section of the foot pedal support and the whole support section out of the slide; when the carrier is used to carry things, the drive cylinder retracts the whole telescopic section of the foot pedal support and part of the support section into the slide.

[0093] In order to facilitate the sliding of the support section into the slide, a foot pedal support 7-5 is provided at the bottom of the front end outlet of the slide, a guide wheel 7-6 matched with the foot pedal support is provided on the support section, and an arc-shaped guide rail is provided on the foot pedal support; in the process of sliding the support section into the slide with the telescopic section, the foot pedal support contacts the bottom of the support section and drives the straight rod section to rotate around the pivot connection between the telescopic section and the support section;

[0094] The support section adopts an L-shaped structure, the foot pedal is rotationally connected at the connection between the vertical section 7-121 and the horizontal section 7-122 of the L-shaped structure, and limiting structures are arranged on the horizontal section and the vertical section; according to requirements, the foot pedal is fixed on the horizontal section or the vertical section by the limiting structures.

[0095] In the above structure, when the carrier is used to carry people, the foot pedal is turned to the horizontal section and fixed on the horizontal section by the limiting structure, at this time, the foot pedal is used to support the user's feet. When the carrier is used to carry goods, the foot pedal is fixed on the vertical section by the limiting structure, at this time, the foot pedal is filled between the horizontal section and the seat plate assembly, so that the foot pedal and the seat plate assembly jointly constitute a cargo carrying plane; wherein the horizontal section serves as a front stop to prevent the goods from sliding off the cargo carrying plane.

[0096] In embodiments 1-5, the traveling wheel assembly includes a traveling wheel bracket 6-1 fixed on the rear side of the bottom of the chair frame, and a universal wheel 6-3 with a foot brake 6-2 connected to the bottom of the traveling wheel bracket. In the flat road traveling mode, the foot brake of the universal wheel is used for braking, and in the stair climbing mode, the triangular wheel driving assembly is used for braking.

[0097] The above is only a preferred embodiment of the present application, and does not limit the present application in any form; any ordinary technical personnel in the industry can easily implement the present application according to the drawings and the above description; however, any equivalent changes, modifications and evolution made by those skilled in the art within the scope of the technical solutions of the present application, using the above disclosed technical content, are equivalent embodiments of the present application; at the same time, any equivalent changes, modifications and evolution of the above embodiments according to the essential technology of the present application are still within the protection scope of the technical solutions of the present application.

Claims

1. A deformable, multi-functional obstacle-crossing vehicle, characterized in that: include The deformable support includes 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. 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: it is attached to the chair frame base or it forms a certain angle with the chair frame base. A hand handle is provided at the rear end of the chair frame. Seat assembly: The seat assembly is installed on the chair frame. Depending on the usage requirements, the seat assembly can be adjusted to a seat position or a flat position. The triangular drive wheel assembly and the travel wheel assembly are located at the front bottom of the chair frame and have a stair climbing mode and a flat road travel mode; the travel wheel assembly is located at the rear bottom of the wheelchair seat. The foot pedal assembly is located at the front of the chair frame and has two states: extended from the chair frame and retracted from the chair frame.

2. The deformable multi-functional obstacle-crossing vehicle according to claim 1, characterized in that: The chair frame drive assembly includes an upper chair frame link, a lower chair frame link, a central shaft, a gear set, and a motor. Upper and lower chair frame links are located on both sides of the chair frame. One end of the upper chair frame link is rotatably connected to the chair frame via a shaft, and the other end of the upper chair frame link is connected to one end of the lower chair frame link via a shaft. The other ends of the lower chair frame links on both sides are fixedly connected to the central shaft. The central shaft is rotatably connected to the chair frame base. A crossbeam is fixedly mounted on the chair frame base, and the motor is fixedly mounted on the crossbeam. The output shaft of the motor is connected to the driving gear of the gear set, and the driven gear of the gear set is fixed to the central shaft. The driving and driven gears of the gear set mesh with each other.

3. The deformable multi-functional obstacle-crossing vehicle according to claim 1, characterized in that: The chair frame drive assembly includes an upper chair frame link, a lower chair frame link, a central pivot, a crank, and a telescopic push rod. Upper and lower chair frame links are located on both sides of the chair frame. One end of the upper chair frame link is rotatably connected to the chair frame via a pivot, and the other end of the upper chair frame link is connected to one end of the lower chair frame link via a pivot. The other ends of the lower chair frame links on both sides are fixedly connected to the central pivot. The central pivot is rotatably connected to the chair frame seat. One end of the crank is fixed to the central pivot, and the other end of the crank is connected to the end of the telescopic push rod via a pivot. The other end of the telescopic push rod is connected to the chair frame seat via a pivot. The boundary points of the range of the telescopic push rod driving the crank rotation correspond to: the lower chair frame link and the upper chair frame link being on the same straight line; the pivot at the connection point of the upper and lower chair frame links being below the height of the central pivot, and the chair frame and chair frame seat being in contact.

4. The deformable multi-functional obstacle-crossing vehicle according to claim 1, characterized in that: The seat assembly includes the armrest assembly and the seat back assembly; The seat back assembly includes a backrest frame, a backrest frame support rod, a seat frame, and a seat support rod. Both sides of the backrest frame and seat frame are connected to the chair frame via pivots, and the pivots at the connections between the backrest frame and the chair frame, and between the seat frame and the chair frame, are located on the same straight line parallel to the length of the chair frame. The seat frame is located at the front of the backrest frame, with a predetermined gap between them. At least one backrest frame support rod connects the backrest frame and the seat frame, with one end of the support rod slidably connected to the end of the backrest frame near the seat frame. The headrest and backrest support rod are connected to one end of the seat frame via a pivot; at least one seat support rod is connected between the seat frame and the chair frame, or between the seat frame and the chair frame seat. One end of the seat support rod is connected to the front end of the seat frame via a pivot. The other side of the seat support rod is provided with a first guide groove and a first slot communicating with the first guide groove. The first slot is located at the end of the first guide groove away from the seat frame. A first guide rod is provided on the chair frame or chair frame seat. The first guide rod is slidably connected in the first guide groove and the first slot. The armrest assembly includes an armrest and an armrest support rod. One end of the armrest is connected to the chair frame via a pivot, and one end of the armrest support rod is connected to the middle of the armrest via a pivot. The other side of the armrest support rod is provided with a second guide groove and a second slot communicating with the second guide groove. The first slot is located at the end of the first guide groove away from the armrest. A second guide rod is fixedly provided on the chair frame and is slidably connected in the second guide groove and the second slot.

5. The deformable multi-functional obstacle-crossing vehicle according to claim 1, characterized in that: The seat assembly includes the armrest assembly and the seat back assembly; The seat back assembly includes a backrest frame, a backrest frame support rod, a seat frame, and a first telescopic rod; both sides of the backrest frame and the seat frame are connected to the chair frame via pivots, and the pivots at the connection points of the backrest frame and the chair frame, and the pivots at the connection points of the seat frame and the chair frame are located on the same straight line parallel to the length direction of the chair frame; the seat frame is located at the front of the backrest frame, with a set gap between them; at least one backrest frame support rod is connected between the backrest frame and the seat frame, one end of the backrest frame support rod is slidably connected to the end of the backrest frame near the seat frame, and the other end of the backrest frame support rod is connected to one end of the seat frame via a pivot; the two ends of the first telescopic rod are respectively connected to the seat frame and the chair frame, or the seat frame and the chair frame seat via pivots; The armrest assembly includes an armrest and a second telescopic rod. One end of the armrest is connected to the chair frame via a pivot, one end of the second telescopic rod is connected to the middle of the armrest via a pivot, and the other end of the second telescopic rod is connected to the chair frame seat via a pivot.

6. The deformable multi-functional obstacle-crossing vehicle according to claim 4 or 5, characterized in that: The backrest is detachably mounted on the backrest frame, and the seat is detachably mounted on the seat frame; both the backrest and the seat have two sides, a cargo side and a passenger side, and the orientation of the seat and backrest can be adjusted as needed.

7. The deformable multi-functional obstacle-crossing vehicle according to claim 1, characterized in that: 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, a drive shaft rotatably connected to the base bracket, triangular wheel frames fixed at both ends of the drive shaft, and rollers circumferentially distributed on the triangular wheel frames; The drive mechanism includes a motor fixed on the base bracket, a clutch connected to the motor output shaft, 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 rotation of the rollers as needed, and the braking mechanism adopts an existing structure.

8. The deformable multi-functional obstacle-crossing vehicle according to claim 1, characterized in that: The wheel assembly includes a wheel bracket fixed to the rear side of the bottom of the chair frame and swivel wheels with foot brakes connected to the bottom of the wheel bracket.

9. The deformable multi-functional obstacle-crossing vehicle according to claim 1, characterized in that: The foot pedal assembly includes a foot pedal bracket, a foot pedal, a connecting rod, and a drive cylinder. Two parallel slides along the vehicle's forward direction are provided within the seat frame. Through slots are provided on opposite sides of the rear sections of the two slides. The foot pedal bracket includes a telescopic section and a support section. The support section is connected to the front end of the telescopic section via a pivot. The telescopic section is placed within the slides, and the inner ends of the telescopic sections within the two slides are fixedly connected by the connecting rod passing through the through slots. One end of the drive cylinder is connected to the seat frame, and the other end is connected to the connecting rod. When the connecting rod reaches the rear end of the through slot, the telescopic section is completely within the slide, and the support section is also partially within the slide. When the connecting rod reaches the front end of the through slot, the telescopic section extends out of the slide, and the support section is completely outside the slide. The foot pedal is installed between the two support sections. Alternatively, the foot pedal assembly includes a footrest bracket, a foot pedal, and a drive cylinder, with two parallel tracks within the seat frame along the vehicle's forward direction. The footrest bracket includes a telescopic section and a support section, with the support section connected to the front end of the telescopic section via a pivot. The telescopic section is placed within the tracks, and the inner ends of the telescopic sections within the two tracks are fixedly connected by connecting rods passing through through slots. The drive cylinder is placed inside the tracks and connected between the inner wall of the tracks and the inner end of the telescopic section. When the drive cylinder is retracted to its shortest position, the telescopic section is completely within the tracks, and the support section is partially within the tracks. When the drive cylinder is extended to its longest position, the telescopic section partially extends out of the tracks, and the support section is completely outside the tracks. The foot pedal is installed between the two support sections.

10. The deformable multi-functional obstacle-crossing vehicle according to claim 9, characterized in that: A foot support plate is provided at the bottom of the front exit of the slide. A guide wheel matching the foot support plate is provided on the support section. An arc-shaped guide rail is provided on the foot support plate. During the process of the support section sliding into the slide 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 pivot point where it connects with the telescopic section. The support section adopts an L-shaped structure, and the foot pedal is rotatably connected at the connection between the vertical and horizontal sections of the L-shaped structure. Limiting structures are provided on both the horizontal and vertical sections. Depending on the requirements, the foot pedal can be fixed to the horizontal or vertical section using the limiting structures.

Images