CN212281928U

CN212281928U - Foldable wheelchair

Info

Publication number: CN212281928U
Application number: CN202020548916.1U
Authority: CN
Inventors: 陈向阳
Original assignee: Zhejiang Aceme Electric Co ltd
Current assignee: Zhejiang Aceme Electric Co ltd
Priority date: 2020-04-14
Filing date: 2020-04-14
Publication date: 2021-01-05
Anticipated expiration: 2030-04-14

Abstract

The utility model provides a foldable wheelchair, through rotating the upper end of rear wheel support and the lower extreme of back support and being connected, the rear end of front wheel support and the upper portion of rear wheel support rotate and be connected, the rear end of seat board and the middle part of back support rotate and be connected, the upper end of seat bracing piece and the front portion of seat board rotate and be connected, the front portion of bottom stay bar and the front portion of front wheel support rotate and be connected, the middle part of bottom stay bar and the lower extreme of seat bracing piece rotate and be connected, the rear end of bottom stay bar and the lower part of back support rotate and be connected, make back support, rear wheel support, constitute four-bar linkage between bottom stay bar and the front wheel support, make back support, seat board, also constitute four-bar linkage between seat bracing piece and the bottom stay bar, when locking mechanical system unblock, can make through the rotation of back support for back support and transform to fold condition, simple structure and convenient use.

Description

Foldable wheelchair

Technical Field

The utility model relates to the field of medical equipment, concretely relates to collapsible wheelchair.

Background

In the process of treating and recovering patients, particularly for patients who cannot walk independently, the wheelchair mode is usually adopted to replace walking, so that the patients can be treated and recovered well, and the daily life of the patients is facilitated.

The chair that current wheelchair adopted fixed knot to construct more erects and forms in a pair of gyro wheel pivot, the diameter of gyro wheel is great, make the upper portion of gyro wheel can be convenient enough by user's hand, the user rotates the gyro wheel through hand and makes the wheelchair advance or retreat, this kind of wheelchair can't be folded, need occupy great space, also have some folding wheelchairs in the market, but most structure is complicated, and need both hands to operate when folding, it is very inconvenient to use.

SUMMERY OF THE UTILITY MODEL

The utility model aims to overcome the defects of the prior art and provide a foldable wheelchair with simple structure and convenient use.

In order to achieve the above object, the present invention provides a foldable wheelchair, which is characterized in that, including the same side support of the structure of the branch locating the left and right sides, being located these both sides connect between the side support the cross bar of the side support, locate the front wheel of the side support front lower side, locate the rear wheel of the side support rear lower side, the side support has the expansion state and fold state, the homonymy the side support includes:

the end part of the transverse connecting rod is connected with the upper end part of the backrest bracket;

the upper end part of the rear wheel bracket is rotationally connected with the lower end part of the backrest bracket, and the rear wheel is rotationally arranged at the lower end part of the rear wheel bracket;

the front wheel bracket extends along the front-back direction, the rear end part of the front wheel bracket is higher than the front end part of the front wheel bracket, the rear end part of the front wheel bracket is rotatably connected to the upper part of the rear wheel bracket, and the front wheel is rotatably arranged at the front end part of the front wheel bracket;

a seat mechanism comprising a seat plate, a bottom brace, and a seat brace;

the rear end part of the seat plate is rotatably connected to the middle part of the backrest support, the front end part of the bottom support rod is rotatably connected with the front part of the front wheel support, the rear end part of the bottom support rod is rotatably connected to the lower part of the backrest support, the seat support rod is positioned below the seat plate, the upper end part of the seat support rod is rotatably connected with the front part of the seat plate, and the lower end part of the seat support rod is rotatably connected with the middle part of the bottom support rod;

the foldable wheelchair further comprises a locking mechanism, when the locking mechanism is in a locking state, the relative positions of the backrest support and the rear wheel support are kept fixed, the side supports are supported on the front wheels and the rear wheels, the side supports are in an unfolding state, when the locking mechanism is in an unlocking state, the rear wheel support can rotate relative to the backrest support in a direction close to the front wheel support, and the backrest support and the seat mechanism are driven to approach the front wheel support, so that the side supports are changed into a folding state;

the foldable wheelchair further comprises an unlocking device for unlocking the locking mechanism.

Preferably, the rear end of the bottom stay is connected with the lower part of the backrest support in a unidirectional rotation manner, and when the side supports are in the unfolded state, the bottom stay can only rotate towards the direction close to the front wheel support relative to the backrest support.

Preferably, the rear end of the front wheel bracket is connected with the upper part of the rear wheel bracket in a unidirectional rotation manner, and when the side bracket is in the unfolding state, the rear wheel bracket can only rotate towards the direction close to the front wheel bracket.

Preferably, the rear wheel is provided with an in-wheel motor for driving the rear wheel to rotate, and a rotation axis of an output shaft of the in-wheel motor coincides with a rotation axis of the rear wheel.

Preferably, the foldable wheelchair further comprises a rotatable control pedal, the control pedal is connected with the switching rod, when the control pedal is stepped on, the switching rod is pressed down, the hub motor is in a power-on/power-off state, when the control pedal is lifted up, the switching rod bounces, and the hub motor is in a power-off/power-on state.

Further preferably, the foldable wheelchair further comprises a battery box for providing power to the in-wheel motor, the battery box is located at the rear part of the foldable wheelchair, and the battery box is erected on the rear wheel bracket.

Further preferably, the backrest support is further connected with a grab bar, the grab bar is rotatably arranged on the backrest support, and when the side support is in the unfolded state, the upper surface of the grab bar is parallel to the upper surface of the seat plate.

Further preferably, the foldable wheelchair further comprises a controller for controlling the rotation speed and the rotation direction of the hub motor, and the controller is arranged in front of the grab bar.

Preferably, the front part of the front wheel bracket is further connected with a pedal mounting rod, a rotatable pedal is arranged in the middle of the pedal mounting rod, and the rotatable angle range of the pedal is 0-30 degrees.

Further preferably, the transverse connecting rod is provided with a rotatable back board, and the rotatable angle range of the back board is 0-30 degrees.

Because of above-mentioned technical scheme's application, compared with the prior art, the utility model have the following advantage:

Drawings

Fig. 1 is a front side perspective view of the present invention.

Fig. 2 is a perspective view of the rear side of the present invention.

Fig. 3 is a left side view of the present invention, wherein the foldable wheelchair is in an unfolded state.

Fig. 4 is a left side view of the present invention, wherein the foldable wheelchair is in the process of being unfolded to folded.

Fig. 5 is a left side view of the present invention, with the collapsible wheelchair in a collapsed position.

Fig. 6 is an enlarged partial sectional view taken at a in fig. 3.

Fig. 7 is a schematic top view of the footrest in accordance with the present invention.

Fig. 8 is a schematic sectional view in the direction B-B in fig. 7.

Fig. 9 is an assembly view of the middle sole stay bar and the backrest support of the present invention.

Fig. 10 is a front side assembly view of the front wheel support and the rear wheel support of the present invention.

Fig. 11 is a rear side assembly view of the front wheel support and the rear wheel support of the present invention.

Fig. 12 is a schematic view of the middle and rear wheel and the in-wheel motor according to the present invention.

Fig. 13 is a perspective view of the present invention.

Wherein: 11. a left side bracket; 12. a right side bracket; 13. a left rear wheel; 14. a right rear wheel; 15. a left front wheel; 16. a right front wheel; 20. a transverse connecting rod; 100. a backrest support; 101. a first bump; 200. a rear wheel support; 201. a second bump; 300. a front wheel bracket; 301. a third bump; 400. a seat mechanism; 401. a seat plate; 402. a bottom stay; 4021. a fourth bump; 403. a seat support bar; 500. a locking mechanism; 600. unlocking the carrying handle; 701. a left hub motor; 7011. a left switch lever; 702. a right hub motor; 7021. a right switch lever; 703. a control pedal; 704. a battery box; 705. a controller; 801. a grab rail; 802. a foot board mounting rod; 8021. a foot pedal; 8022. a screw; 8023. a first stopper; 8024. a second limiting block; 803. 8031, bumps; 8032. and (4) a groove.

Detailed Description

The following detailed description of the preferred embodiments of the present invention is provided to enable those skilled in the art to more easily understand the advantages and features of the present invention, and to make clear and definite definitions of the protection scope of the present invention.

The front, back, left, right, up and down directions described in the present invention refer to the front, back, left, right, up and down directions in fig. 1.

As shown in fig. 1-11, the utility model provides a foldable wheelchair, including the collateral branch frame, the cross-bar 20, front wheel and rear wheel, wherein, the collateral branch frame has two, be located left side support 11 and the right side support 12 that is located the right side respectively, the cross-bar 20 is located between left side support 11 and the right side support 12, left side support 11 and right side support 12 are connected to cross-bar 20, the front wheel is including locating left front wheel 15 of left side support 11 front below and locating right front wheel 16 of right side support 12 front below, the rear wheel is including locating left rear wheel 13 of left side support 11 rear below and locating right rear wheel 14 of right side support 12 rear below, these two collateral branch frame structures are the same, and all have expansion state and fold condition, the following explains for the example with left side support 11.

The left side bracket 11 comprises a backrest bracket 100, a rear wheel bracket 200, a front wheel bracket 300, a seat mechanism 400, a locking mechanism 500 and an unlocking device, wherein the upper end part of the backrest bracket 100 is connected with the transverse connecting rod 20, the upper end part of the rear wheel bracket 200 is rotatably connected with the lower end part of the backrest bracket 100, and a left rear wheel 13 is rotatably arranged at the lower end part of the rear wheel bracket 200; the front wheel frame 300 extends in the front-rear direction, the rear end portion of the front wheel frame 300 is higher than the front end portion of the front wheel frame 300 to make the front wheel frame 300 assume an inclined state gradually rising from the front to the rear, the rear end portion of the front wheel frame 300 is rotatably coupled to the upper portion of the rear wheel frame 200, and the left front wheel 15 is rotatably provided at the front end portion of the front wheel frame 300.

The seat mechanism 400 is located between the left side frame 11 and the right side frame 12, and the seat mechanism 400 includes a seat plate 401, a bottom stay 402, and a seat support bar 403, wherein a rear end portion of the seat plate 401 is rotatably connected to a center portion of the back frame 100, a front end portion of the bottom stay 402 is rotatably connected to a front portion of the front wheel frame 300, a rear end portion of the bottom stay 402 is rotatably connected to a lower portion of the back frame 100, the seat support bar 403 is located below the seat plate 401, an upper end portion of the seat support bar 403 is rotatably connected to a front portion of the seat plate 401, and a lower end portion of the seat support bar 403 is rotatably connected to a center portion of the bottom stay 402.

As shown in fig. 3 to 5, a flat four-bar linkage is formed between the back frame 100, the rear wheel frame 200, the bottom stay 402 and the front wheel frame 300, and a flat four-bar linkage is formed between the back frame 100, the seat plate 400, the seat support bar 403 and the bottom stay 402, and when the rear wheel frame 200 and the back frame 100 are in a fixed state, the flat four-bar linkage is in a fixed state, and when the rear wheel frame 200 rotates with respect to the back frame 100, the flat four-bar linkage is in a movable state.

The locking mechanism 500 is used to lock the relative positions of the backrest support 100 and the rear wheel support 200, when the locking mechanism 500 is in the locked state, the relative positions of the backrest support 100 and the rear wheel support 200 are kept fixed, the left side support 11 is supported on the left front wheel 15 and the left rear wheel 13, and of course, the right side support 12 is supported on the right front wheel 16 and the right rear wheel 14, so that the left side support 11 and the right side support 12 are both in the unfolded state, when the locking mechanism 500 is in the unlocked state, the rear wheel support 200 can rotate relative to the backrest support 100 in a direction close to the front wheel support 300, and drives the backrest support 100 and the seat mechanism 400 to approach the front wheel support 300, so that the left side support 11 is changed into the folded state, and of course, the right side support 12 is also changed into the folded state at.

The concrete structure of locking mechanical system 500 is prior art, and mode such as the cooperation that adopts the spring bolt lockhole, couple stand all can realize, also not the utility model discloses a utility model point, no longer give unnecessary details here.

Collapsible wheelchair still including the unlocking device who is used for unblock locking mechanical system 500, in this example, unlocking device is unblock carrying handle 600, unblock carrying handle 600 unblocks locking mechanical system 500 through rotating, the tip of unblock carrying handle 600 rotationally sets up on rear wheel support 200, the pivot axis line of unblock carrying handle 600 coincides mutually with rear wheel support 200 for the pivot axis line of back support 100.

The rear end portion of the bottom stay 402 is rotatably connected to the lower portion of the back frame 100 in one direction, which is advantageous in that the stability of the left side frame 11 in the unfolded state is enhanced, and in particular, the bottom stay 402 can be rotated only in a direction close to the front wheel frame 300 with respect to the back frame 100, structurally, the rear end portion of the bottom stay 402 is provided with a fourth protrusion 4021, the lower portion of the back bracket 100 is provided with a first protrusion 101, when the bottom stay 402 is rotated relative to the back bracket 100 in a direction away from the front wheel bracket 300, the first protrusion 101 and the fourth protrusion 4021 approach each other, when the bottom stay 402 rotates relative to the back bracket 100 in a direction approaching the front wheel bracket 300, the first protrusion 101 and the fourth protrusion 4021 move away from each other, when the left bracket 11 is in the unfolded state, one side surface of the first projection 101 abuts against one side surface of the fourth projection 4021, so that the bottom stay 402 can only rotate in a direction approaching the front wheel carrier 300 with respect to the back rest carrier 100.

Similarly, the rear end of the front wheel bracket 300 is connected to the upper portion of the rear wheel bracket 200 in a unidirectional rotation manner, which is advantageous in enhancing the stability of the left side bracket 11 in the unfolded state, and specifically, the rear end of the front wheel bracket 300 is provided with a third protrusion 301, the upper portion of the rear wheel bracket 200 is provided with a second protrusion 201, when the front wheel bracket 300 rotates in a direction away from the rear wheel bracket 200, the second protrusion 201 and the third protrusion 301 approach each other, when the front wheel bracket 300 rotates in a direction towards the rear wheel bracket 200, the second protrusion 201 and the third protrusion 301 move away from each other, and when the left side bracket 11 is in the unfolded state, a side surface of the second protrusion 201 abuts against a side surface of the third protrusion 301, so that the front wheel bracket 300 can only rotate in a direction towards the rear wheel bracket 200.

In order to facilitate the use of the rider, the foldable wheelchair of the present invention is provided with an in-wheel motor for driving the rear wheel to rotate, specifically, a left in-wheel motor 701 is provided on the left rear wheel 13, an in-wheel motor 702 is provided on the right rear wheel 14, the axial lead of the output shaft of the left in-wheel motor 701/the right in-wheel motor 702 coincides with the rotational axial lead of the left rear wheel 13/the right rear wheel 14, and for conveniently switching the foldable wheelchair between the electric driving mode and the manual pushing mode, the in-wheel motor is provided with a switching lever capable of being lifted and controlled to be powered on or powered off, the in-wheel motor is a conventional one, the internal structure thereof is not a point of the present invention, and is not repeated herein, in order to press the switching lever on the left in-wheel motor 701 and the right in-wheel motor 702 simultaneously, the foldable wheelchair further comprises a rotatable control pedal 703, the control pedal 703 is rotatably erected on the left hub motor 701 and the right hub motor 702, the lower surface of the control pedal 703 is connected with the left switching rod 7011 of the left hub motor 701 and the right switching rod 7021 of the right hub motor 702, when the control pedal 703 is stepped on, the left switching rod 7011 and the right switching rod 7021 are simultaneously pressed down to simultaneously power on/off the left hub motor 701 and the right hub motor 702, and when the control pedal 703 is lifted, the left switching rod 7011 and the right switching rod 7021 are simultaneously bounced to simultaneously power off/on the left hub motor 701 and the right hub motor 702, so that the foldable wheelchair is switched between an electric driving mode and a manual pushing mode.

Further, the foldable wheelchair further comprises a battery box 704 for providing power for the in-wheel motor, the battery box 704 is located at the rear part of the foldable wheelchair, and specifically, the battery box 704 is erected on the rear wheel bracket 200, so that the battery box 704 can be conveniently detached and installed.

To support the arm parts of the occupant, the back rest support 100 is further connected with a grab bar 801, the grab bar 801 is rotatably provided on the back rest support 100, and when the side supports are in the unfolded state, the upper surface of the grab bar 801 is kept parallel to the upper surface of the seat plate 401.

For convenient control of the in-wheel motor, the foldable wheelchair further comprises a controller 705 for controlling the rotation speed and the rotation direction of the in-wheel motor, and for convenient operation of a rider, the controller 705 is arranged at the front part of the grab bar 801.

In order to support the feet of the rider, a footrest mounting rod 802 is further connected to the front portion of the front wheel bracket 300, and a rotatable footrest 8021 is disposed in the middle of the footrest mounting rod 802, so that the feet of the rider can move to a certain extent and the riding comfort is improved, preferably, the rotatable angle range of the footrest 8021 is 0-30 °, specifically, a screw 8022 longitudinally penetrating through the footrest mounting rod 802 is disposed on the footrest mounting rod 802, the end of the screw 8022 protruding out of the outer circumferential surface of the footrest mounting rod 802 is inserted between a first stopper 8023 and a second stopper 8024 on the footrest 8021, and when the footrest 8021 rotates around the footrest mounting rod 802, the end of the screw 8022 protruding out of the outer circumferential surface of the footrest mounting rod 802 abuts against the first stopper 8023 or the second stopper 8024, so as to limit the rotation angle of the footrest 8021.

In order to support the back of the rider, the transverse link 20 is provided with a rotatable backrest plate 803, which can provide a comfortable backrest angle for the rider by rotating the backrest plate 803, so as to improve the riding comfort, preferably, the rotatable angle range of the backrest plate 803 is 0-30 °, specifically, the transverse link 20 is provided with a projection 8031, the projection 8031 is inserted into a groove 8032 of the backrest plate 803, and when the backrest plate 803 rotates around the transverse link 20, the projection 8031 abuts against the side wall of the groove 8032, so as to limit the rotation angle of the backrest plate 803.

Front end, rear end, upper end, lower tip indicate the part that is close to this member or support terminal surface, anterior/rear portion/upper portion/lower part indicate the part that is located between tip/rear end portion/upper end portion/lower tip and this member or support middle part before this member or support, for example, the lower part of back support 100 is located the top of the lower tip of back support 100, the axis of rotation of bottom stay 500 and back support 100 is located the top of the axis of rotation of rear wheel support 200 and back support 100 promptly.

The above embodiments are only for illustrating the technical concept and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and to implement the present invention, so as not to limit the protection scope of the present invention, and all equivalent changes or modifications made according to the spirit of the present invention should be covered by the protection scope of the present invention.

Claims

1. The utility model provides a collapsible wheelchair, its characterized in that, including the branch locate the left and right sides the structure is the same collateral branch frame, be located this both sides connect between the collateral branch frame the cross bar of collateral branch frame, locate the preceding front wheel of below, locate the collateral branch frame rear lower side's rear wheel, the collateral branch frame has expansion state and fold condition, the homonymy the collateral branch frame includes:

a seat mechanism comprising a seat plate, a bottom brace, and a seat brace;

2. The foldable wheelchair as recited in claim 1, wherein: the rear end part of the bottom stay bar is connected with the lower part of the backrest support in a unidirectional rotation mode, and when the side supports are in the unfolded state, the bottom stay bar can only rotate towards the direction close to the front wheel support relative to the backrest support.

3. The foldable wheelchair as recited in claim 1, wherein: the rear end part of the front wheel bracket is connected with the upper part of the rear wheel bracket in a unidirectional rotation mode, and when the side bracket is in an unfolded state, the rear wheel bracket can only rotate towards the direction close to the front wheel bracket.

4. The foldable wheelchair as recited in claim 1, wherein: the rear wheel is provided with a hub motor for driving the rear wheel to rotate, and the rotating axis of an output shaft of the hub motor coincides with the rotating axis of the rear wheel.

5. The foldable wheelchair as recited in claim 4, wherein: the foldable wheelchair comprises a foldable wheel hub motor, and is characterized in that a liftable switching rod is arranged on the wheel hub motor and used for controlling the wheel hub motor to be powered on or powered off, the foldable wheel hub motor further comprises a rotatable control pedal, the control pedal is connected with the switching rod, when the control pedal is stepped on, the switching rod is pressed down, the wheel hub motor is in a powered on/powered off state, when the control pedal is lifted up, the switching rod bounces, and the wheel hub motor is in a powered off/powered on state.

6. The foldable wheelchair as recited in claim 4, wherein: the foldable wheelchair further comprises a battery box used for providing power for the hub motor, the battery box is located at the rear part of the foldable wheelchair, and the battery box is erected on the rear wheel support.

7. The foldable wheelchair as recited in claim 4, wherein: the seat plate is characterized in that the backrest support is also connected with a grab rail, the grab rail is rotatably arranged on the backrest support, and when the side support is in an unfolded state, the upper surface of the grab rail is parallel to the upper surface of the seat plate.

8. The foldable wheelchair as recited in claim 7, wherein: the foldable wheelchair further comprises a controller for controlling the rotating speed and the steering direction of the hub motor, and the controller is arranged at the front part of the grab bar.

9. The foldable wheelchair as recited in claim 1, wherein: the front part of the front wheel bracket is also connected with a pedal mounting rod, the middle part of the pedal mounting rod is provided with a rotatable pedal, and the rotatable angle range of the pedal is 0-30 degrees.

10. The foldable wheelchair as recited in any one of claims 1-9, wherein: the transverse connecting rod is provided with a rotatable back board, and the rotatable angle range of the back board is 0-30 degrees.