CN219480644U - Wheelchair pedal plate moving device - Google Patents

Abstract

The utility model provides a wheelchair pedal plate moving device, which comprises at least one rotating piece, wherein the rotating piece is fixedly arranged on a driving shaft of a driving wheel of a wheelchair; the sliding guide piece is arranged on the main body frame of the wheelchair and positioned in front of the driving shaft; a movable pedal arranged in front of the sliding guide piece; the sliding component is arranged on the sliding guide piece and connected with the movable pedal; the transmission mechanism is connected between the rotating piece and the sliding component, and can convert the rotating motion of the rotating piece around the driving shaft into the linear motion of the sliding component along the sliding guide piece and drive the movable pedal to reciprocate. The wheelchair pedal plate moving device converts the rotation power of the driving shaft to the rotating piece into back-and-forth reciprocating motion through the transmission mechanism, and then drives the pedal plate to swing up and down or move back and forth through the ejector rod or the connecting rod, so that the legs of a user can be moved in the moving process of the wheelchair; the pedal is switched between a moving state and a static state by a lock catch between the sliding block and the ejector rod and a clutch mechanism of the telescopic connecting rod or the driving shaft.

Description

Wheelchair pedal plate moving device

Technical Field

The utility model relates to the technical field of wheelchairs, in particular to a wheelchair pedal movable device which utilizes wheelchair driving wheel power to drive pedals to move forwards and backwards or upwards and downwards and is particularly suitable for leg rehabilitation movement of a user.

Background

The wheelchair is used as a common medical instrument and is widely applied to the fields of daily life walking (especially outdoor travel), rehabilitation training and the like of patients with inconvenient lower limbs and incapability of standing and walking. Currently, the existing wheelchairs comprise a common hand-push wheelchair and an electric wheelchair according to power division, and comprise a rear-drive wheelchair and a front-drive wheelchair according to drive wheel layout division. No matter the layout of the power or the driving wheel is distinguished, the wheelchair appearing on the market at present, whether the wheelchair is an electric wheelchair or a traditional hand-push wheelchair, the use mode is that a user with inconvenient lower limbs sits on the wheelchair statically, the legs of the user keep motionless in the process of using the wheelchair to move on the ground, and the user cannot synchronously move along with the movement of the wheelchair. For patients with inconvenient lower limbs and incapacity of standing and walking, the legs of the patients cannot be moved in the moving process of the existing and traditional wheelchair, so that the patients need to assist in leg rehabilitation exercise for a long time, and the leg rehabilitation exercise is abandoned finally due to manpower and material resources. Because the patient legs cannot move for a long time, qi and blood are easy to be blocked, muscle atrophy is easy to cause, rehabilitation and training of the patient legs are not facilitated, and physical and mental health of related patients is greatly influenced.

Therefore, the existing wheelchair only supports sitting still for patients with inconvenient lower limbs, and cannot realize synchronous movement of legs along with the movement of the wheelchair is a technical problem to be solved in the field.

Disclosure of Invention

The utility model provides a wheelchair pedal moving device which utilizes wheelchair driving wheel power to drive pedals to move back and forth or up and down and is especially suitable for leg rehabilitation movement of a user, and aims to solve the technical problem that a wheelchair in the prior art only supports sitting still for patients with inconvenient lower limbs and cannot realize synchronous movement of legs along with the movement of the wheelchair.

In order to solve the problems, the utility model adopts the following technical scheme:

the utility model provides a wheelchair pedal plate moving device, which comprises:

at least one rotating piece fixedly arranged on a driving shaft of a driving wheel of the wheelchair;

the sliding guide piece is arranged on the main body frame of the wheelchair and positioned in front of the driving shaft;

a movable pedal arranged in front of the sliding guide piece;

the sliding component is arranged on the sliding guide piece and connected with the movable pedal;

the transmission mechanism is connected between the rotating piece and the sliding component, and can convert the rotating motion of the rotating piece around the driving shaft into the linear motion of the sliding component along the sliding guide piece and drive the movable pedal to reciprocate.

Preferably, the movable pedal comprises: one end of the movable support is hinged to the main body frame, the movable support is provided with a sliding groove, and one end of the sliding component is movably connected in the sliding groove;

a foot pedal arranged at the other end of the movable bracket;

the sliding component can drive the movable bracket to swing reciprocally around one end of the movable bracket hinged to the main body frame.

Preferably, the movable pedal is fixedly connected to one end of the sliding assembly, which is far away from the driving shaft, and the sliding assembly can drive the movable pedal to reciprocate along the linear motion direction.

Further, the movable pedal further includes: the limiting piece is arranged on the movable bracket;

the main body frame is provided with a guiding and limiting piece which can be matched with the limiting piece and guide and limit the limiting piece.

Preferably, the sliding assembly comprises:

a slider mounted on the sliding guide;

the locking mechanism is arranged on the sliding block;

one end of the ejector rod is arranged on the sliding guide piece and penetrates through the sliding block, and the other end of the ejector rod is connected with the movable pedal;

the ejector rods are provided with a plurality of positioning holes at intervals, and the sliding blocks can be fixedly connected to the ejector rods through the matching of the locking mechanisms and the positioning holes, or are separated from the ejector rods through the matching of the locking mechanisms and the positioning holes.

Preferably, the sliding assembly comprises:

the fixed pipe is movably connected to the transmission mechanism, one end of the fixed pipe, which is far away from the driving shaft, is provided with external threads, and a plurality of elastic clamping pieces are arranged at intervals on the periphery of the opening edge of the fixed pipe, which is far away from the driving shaft;

one end of the connecting rod is connected with the movable pedal, and the other end of the connecting rod extends into the fixed pipe;

the locking lantern ring is sleeved on the connecting rod, one end of the locking lantern ring is provided with an internal thread matched with the external thread, the other end of the locking lantern ring is provided with a taper inner side surface, and the taper inner side surface can be tightly pressed by an elastic clamping piece when the connecting rod stretches out to be connected with the movable pedal through the matching of the internal thread and the external thread, or the elastic clamping piece is loosened to enable the connecting rod to be separated from the movable pedal and retract.

Preferably, the rotating member is a driving crank, the transmission mechanism is a link mechanism, and the transmission mechanism comprises at least one link, one end of the link mechanism is hinged to the driving crank, and the other end of the link mechanism is hinged to the sliding component.

Preferably, the link mechanism includes: one end of the first connecting rod is hinged to the driving crank;

a supporting hole is arranged between two ends of the lever and is hinged with a supporting shaft arranged on the main body frame, and one end of the lever is hinged with the other end of the first connecting rod;

and one end of the second connecting rod is hinged to the other end of the lever, and the other end of the second connecting rod is hinged to the sliding assembly.

Preferably, the rotating member is a driving crank, the transmission mechanism is a steering mechanism, one end of the steering mechanism is movably connected with the driving crank, and the other end of the steering mechanism is hinged with the sliding component.

Preferably, the rotating member is a driving gear, and the transmission mechanism includes:

the driven gear is arranged on the main body frame through a driven gear shaft;

the driven crank is arranged on the driven gear shaft;

and one end of the fourth connecting rod is hinged to the driven crank, and the other end of the fourth connecting rod is hinged to the sliding assembly.

Compared with the prior art, the wheelchair pedal plate moving device provided by the utility model has the following beneficial effects: 1. when a user moves in a wheelchair, the rotary driving force of the driving shaft on the driving wheel and the rotary piece is converted into back-and-forth reciprocating motion through a transmission mechanism such as a crank slider, and then the pedal of the movable pedal is driven to swing up and down or stretch back and forth through a push rod or a connecting rod, so that the user can continuously move legs in the process of moving in the wheelchair, and the qi and blood circulation and muscle vitality of the affected legs are kept at any time, and the rehabilitation motion of the patient is fused in daily life; 2. through the latch mechanism between slider and ejector pin or telescopic connecting rod or the clutch mechanism on the driving shaft, can easily realize the locking and the unblock of movable pedal anytime and anywhere, can make movable pedal freely switch between motion and stationary state, satisfy the user and freely switch between different demands of shank exercise and ordinary mode, the user need not carry out recovered motion carelessly to realize avoiding the user to take place the strain because of excessively taking exercise the shank, improved the use experience of wheelchair simultaneously.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the embodiments or the description of the prior art will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic view of a wheelchair pedal activity device according to a first embodiment of the present utility model;

FIG. 2 is a schematic view of a wheelchair pedal activity device according to a second embodiment of the present utility model;

FIG. 3 is a schematic view of a third embodiment of a wheelchair pedal activity device of the present utility model;

FIG. 4 is a schematic view of a fourth embodiment of a wheelchair pedal activity device of the present utility model;

FIG. 5 is a schematic view of a fifth embodiment of a wheelchair pedal activity device of the present utility model;

FIG. 6 is a schematic view of a wheelchair pedal activity device according to a sixth embodiment of the present utility model;

FIG. 7 is a schematic view of the structure of the movable support of the wheelchair pedal movement device of the present utility model;

FIG. 8 is a schematic view of the structure of the ejector rod of the wheelchair pedal movement device of the present utility model;

FIG. 9 is a schematic view of the assembly of the sliding guide, slider, latch mechanism and push rod of the wheelchair footrest activity device of the present utility model;

fig. 10 is a schematic diagram of the working principle of the locking and unlocking slide blocks and the ejector rods of the locking mechanism of the wheelchair pedal movable device.

Wherein, each reference numeral in the figure mainly marks:

1. a driving shaft; 11. a drive crank; 111. an adjustment aperture; 12. a first link; 13. a lever; 131. a support shaft; 14. a second link; 15. a scotch yoke mechanism; 16. a drive gear; 17. a driven gear; 18. a driven crank; 19. a fourth link; 2. a driving wheel; 3. a sliding guide; 4. a main body frame; 41. a guide stopper; 5. a movable bracket; 51. a chute; 52. a foot pedal; 53. a limiting piece; 6. a slide block; 61. a locking mechanism; 611. a handle; 612. a boss; 613. locking a column; 614. a lock head; 615. a through hole; 616. a spring; 617. a relief hole; 62. a push rod; 621. positioning holes; 63. a connecting piece; 7. a fixed tube; 71. an elastic clamping piece; 72. positioning a shaft; 8. a connecting rod; 9. a locking collar.

Detailed Description

In order to make the technical problems, technical schemes and beneficial effects to be solved more clear, the utility model is further described in detail below with reference to fig. 1-8 and embodiments.

Referring to fig. 1-8, the wheelchair pedal moving device provided by the present utility model includes:

the wheelchair comprises a main body frame 4 serving as a supporting structure, a pair of rotating shafts respectively and rotatably arranged at the front end and the rear end of the bottom of the main body frame 4, wherein one rotating shaft of the pair of rotating shafts is a driving shaft 1, and the other rotating shaft is a driven shaft; in one embodiment, the wheelchair further comprises a pair of driving wheels 2 and at least one driven wheel respectively correspondingly arranged at two ends of the driving shaft 1 and the driven shaft; in another embodiment, the wheelchair comprises at least one driving wheel 2 and a pair of driven wheels correspondingly arranged on the driving shaft 1 and respectively arranged on two ends of the driven shaft; in other embodiments, the number of driving wheels 2 or driven wheels may be three or more.

The utility model provides a wheelchair pedal 52 movement device further comprising:

at least one rotating member fixedly installed on the rotating shaft of the driving wheel 2 of the wheelchair; a sliding guide 3 mounted on a main body frame 4 of the wheelchair in front of the rotation shaft; in the present utility model, the front and rear directions are the normal forward direction of the wheelchair in the wheelchair technical field, that is, the directions of the two sides are the left or right directions relative to the front and rear directions when the user sits on (the cushion of) the main body frame 4 of the wheelchair in a sitting posture and faces forward; a slide assembly mounted on the slide guide 3 and linearly movable (reciprocally movable) in an extending direction of the slide guide 3; a movable pedal provided in front of the slide guide 3; the ejector rod 62 is connected between the sliding component and the movable pedal; and the transmission mechanism is connected between the rotating member and the sliding assembly, can convert the rotating motion of the rotating member around the rotating shaft (namely, the driving shaft 1 of the wheelchair) into the linear motion of the sliding assembly along the sliding guide member 3, and can drive the movable pedal to reciprocate through the sliding assembly linkage ejector rod 62.

Referring to fig. 1, as a first embodiment of the present utility model, an activity pedal includes:

the movable support 5, one end of the movable support 5 is hinged to the main body frame 4, the movable support 5 is provided with a chute 51, and one end of a mandril 62 is movably connected in the chute 51; as a preferred implementation manner of this embodiment, the wheelchair is a rear driving wheel 2 wheelchair, the diameter of the driving wheel 2 is larger than that of a front driven wheel (in other embodiments, the diameter of the driving wheel 2 can be smaller than that of the driven wheel), one end of the movable support 5 is hinged on a hinge shaft arranged at a joint (near a side girder) between a front vertical pipe (positioned in front of the driving shaft 1) of the main body frame 4 and a front cross beam, and the other end of the movable support 5 can rotate (namely, moves up and down while moving back and forth relative to the main body frame 4, and is similar to swinging of a clock) around the hinge shaft hinged at one end of the movable support 5; a foot pedal 52 provided at the other end of the movable bracket 5.

In this embodiment, the ejector rod 62 may drive the movable bracket 5 to reciprocate around one end thereof hinged to the main body frame 4, so as to drive the foot pedal 52 at the other end of the movable bracket 5 to reciprocate up and down while reciprocating back and forth.

In the present embodiment, the rotating member is a driving crank 11, and the link mechanism includes:

a first connecting rod 12, one end of the first connecting rod 12 is hinged to the driving crank 11; a lever 13 having a support hole provided between both ends thereof, the support hole being hinged to a support shaft 131 provided to the main body frame 4, one end of the lever 13 being hinged to the other end of the first link 12; and a second link 14, one end of the second link 14 is hinged to the other end of the lever 13, and the other end of the second link 14 is hinged to the sliding assembly (the slider 6 of the sliding assembly or the fixed tube 7, see below). In the present embodiment, the size ratio of the distance of the support hole from one end of the second link 14 and the distance thereof from the other end of the first link 12 can be arbitrarily adjusted as needed. When the distance between the supporting hole and one end of the second connecting rod 14 is smaller than the distance between the supporting hole and the other end of the first connecting rod 12, the wheelchair is pushed with less effort, and the running range of the movable pedal is smaller; and when the distance between the support hole and one end of the second connecting rod 14 is greater than that between the support hole and the other end of the first connecting rod 12, the operation range of the movable pedal is greater.

Referring to fig. 2, as a second embodiment of the present utility model, the movable pedal is omitted from the movable support 5 in the first embodiment, but is used as a fixed pedal 52 and is directly and fixedly connected to an end of the ejector rod 62 away from the rotating shaft, and the ejector rod 62 can drive the movable pedal to reciprocate along the linear motion direction of the sliding assembly. Compared with the first embodiment, the movable pedal of the second embodiment has a simple structure, but can only realize back-and-forth reciprocating motion, and cannot reciprocate up and down at the same time.

Referring to fig. 3, as a third embodiment of the present utility model, the rotary member is also a driving crank 11, which is different from the first embodiment in that: the transmission mechanism is a link mechanism adopting a single link (only comprising a first link 12), one end of the first link 12 is hinged to the driving crank 11, and the other end of the first link 12 is hinged to the sliding component.

The above embodiment is equivalent to omitting the lever 13 and the second link 14 in the first embodiment, and connecting the driving crank 11 directly to the sliding assembly through the first link 12. The link mechanism of the first embodiment adopts the lever 13 and a pair of links connected at two ends of the lever 13 to hinge the three sections of rod pieces from beginning to end, correspondingly, the rotation motion of the rotating member is converted into the linear motion of the sliding block 6 through the lever 13 and the pair of links to have larger thrust force, so that the use is more labor-saving, and the link mechanism of the third embodiment only correspondingly hinges the driving crank 11 and the sliding component through two ends of one section of rod piece respectively, so that the motion speed of the sliding component driven by the link mechanism is less in change; and the linkage mechanism of the third embodiment has a simple structure and lower cost compared with the first embodiment.

Referring to fig. 4, as a fourth embodiment of the present utility model, the rotary member is also a driving crank 11, which is different from the first and third embodiments as follows: the transmission mechanism is a steering mechanism 15, one end of the steering mechanism 15 is movably connected with the driving crank 11, and the other end of the steering mechanism 15 is hinged with the sliding component.

Referring to fig. 5, as a fifth embodiment of the present utility model, the differences from the first to fourth embodiments are as follows: the rotating member is a driving gear 16, and the transmission mechanism includes:

a driven gear 17 mounted on the main body frame 4 through a driven gear 17 shaft; a driven crank 18 mounted on the driven shaft; a fourth link 19, one end of the fourth link 19 being hinged to the driven crank 18, and the other end of the fourth link 19 being hinged to the slide assembly.

Referring to fig. 1-5, 9 and 10, as a common implementation of the first to fifth embodiments of the present utility model, the sliding assembly includes:

a slider 6 mounted on the slide guide 3; a lock mechanism 61 provided on the slider 6; the ejector rod 62, one end of which is mounted on the sliding guide 3 and passes through the abdication hole 617 in the slider 6, and the other end of which is connected to the movable pedal (the other end of the ejector rod 62 is movably connected to the chute 51 of the movable pedal or the movable pedal is fixedly connected to the movable pedal when the movable pedal is directly used as the pedal 52, refer to the first and second embodiments); the ejector rod 62 is provided with a plurality of positioning holes 621 at intervals, and the sliding component can be fixedly connected to the ejector rod 62 by matching the locking mechanism 61 with the positioning holes 621, or is separated from the ejector rod 62 by separating the locking mechanism 61 from the matching with the positioning holes 621. In the present embodiment, the inside of the slider 6 (the side facing the inside of the wheelchair) is provided with a connecting piece 63 for connecting with the transmission mechanism (the link or the scotch yoke mechanism 15); the outside of the slide block 6 (the side facing away from the inside of the slide block 6 and toward the outside of the wheelchair) is provided with a convex portion 612 for heightening the thickness of the slide block 6; the latch mechanism 61 includes: a through hole 615 penetrating the outside of the slider 6 and the boss 612, one end of the through hole 615 communicating with the boss 612 away from the outer surface of the slider 6, and the other end of the through hole 615 communicating with the relief hole 617 of the slider 6; the lock column 613 penetrating through the through hole 615, one end of the lock column 613 penetrating through the outer surface of the protruding portion 612 is connected with a handle 611, one end of the lock column 613 penetrating through the through hole 615 is connected with a lock head 614, and the shape of the lock head 614 is matched with the shape of the positioning hole 621 of the ejector rod 62.

When the movable pedal is not needed, the handle 611 is attached to the left part of the boss 612 at the left side of the through hole 615 as shown in fig. 10, at this time, the lock cylinder 613 is located at the highest point from the abdication hole 617 (the ejector rod 62 and the positioning hole 621 thereof), the lock head 614 is located in the through hole 615 and is out of contact with the ejector rod 62 and the positioning hole 621 thereof, and the driving mechanism drives the slide block 6 to slide along the sliding guide 3 outside the ejector rod 62 without driving the movable pedal.

When the movable pedal is needed, when the ejector rod 62 slides to one of the positioning holes 621 along the yielding hole 617 inside the slider 6 to be aligned with the through hole 615 of the slider 6 (which can be achieved by providing corresponding alignment marks on the slider 6 and the ejector rod 62), the handle 611 is pulled clockwise from the state of being attached to the boss 612 at the left side portion of the through hole 615 (the middle state of the handle 611 perpendicular to the boss 612 in the process of pulling the handle 611 is shown in fig. 10), until the handle 611 is in the state of being attached to the boss 612 at the right side portion of the through hole 615, at this time, the lock post 613 is at the lowest point from the yielding hole 617 (the ejector rod 62 and the positioning hole 621 thereof), the lock head 614 extends downwards into the corresponding positioning hole 621 and is clamped with the ejector rod 62 and the positioning hole 621 thereof (in this process, the spring 616 provides a shock absorbing and buffering effect), and the ejector rod 62 can be driven by the transmission mechanism and the slider 6 moving linearly along the sliding guide 3, and freely drives the movable pedal.

The operating principle of the wheelchair pedal 52 moving device employing the slide assemblies of the first to fifth embodiments is as follows:

when the locking mechanism 61 locks the sliding block 6 and the ejector rod 62 and the wheelchair moves, a crank arranged at the driving shaft 1 at the inner side of the driving wheel 2 synchronously rotates along with the driving shaft 1 and the driving wheel 2, and the sliding block 6 and the ejector rod 62 are driven to reciprocate back and forth through the transmission mechanism. The ejector rod 62 is propped against the sliding groove 51 on the back (rear) of the movable support 5 of the movable pedal, so that the lower end (bottom end) of the movable support 5 with the pedal 52 is driven to rotate around the joint of the upper end (top end) and the hinge shaft of the main body frame 4 to perform up-and-down movement (swing); when the lock mechanism 61 unlocks the slider 6 and the jack 62 (releases the lock connecting the slider 6 and the jack 62), the jack 62 does not reciprocate back and forth any more, and the user can stop the movement of the affected leg.

Referring to fig. 6, as a sixth embodiment of the present utility model, a sliding assembly includes:

the fixed pipe 7 is movably connected to the transmission mechanism, one end of the fixed pipe 7, which is far away from the driving shaft 1, is provided with external threads, and a plurality of elastic clamping pieces 71 are arranged at intervals on the periphery of the opening edge of the fixed pipe 7, which is far away from the driving shaft 1; in the present embodiment, the fixed tube 7 is provided with a positioning shaft 72 for hinging with the transmission mechanism (the transmission mechanism is referred to in the first embodiment, the second link 14 is hinged with the slider 6 instead of being hinged with the positioning shaft 72 of the fixed tube 7 that replaces the slider 6).

The connecting rod 8, one end of the connecting rod 8 is connected to the movable pedal, and the other end of the connecting rod 8 stretches into the fixed pipe 7;

the locking lantern ring 9 is sleeved on the fixed rod, one end of the locking lantern ring 9 is provided with an internal thread matched with the external thread, the other end of the locking lantern ring 9 is provided with a taper inner side surface, and the taper inner side surface can be tightly pressed by the elastic clamping piece 71 when the connecting rod 8 stretches out to be connected with the movable pedal through the matching of the internal thread and the external thread, or the connecting rod 8 is retracted and separated from the movable pedal after the elastic clamping piece 71 is loosened.

Compared with the previous embodiment, the sliding block 6 assembly of the sixth embodiment omits the sliding block 6 and the locking mechanism 61, replaces the ejector rod 62 with an assembly composed of a telescopic fixed tube 7, a connecting rod 8 and a locking collar 9, and the fixed tube 7 is driven by a transmission mechanism to reciprocate back and forth; after the connecting rod 8 is pulled out from the fixed pipe 7 and is extended to be connected with the movable pedal, the locking collar 9 is rotated to lock the connecting rod 8, and at the moment, the end part of the connecting rod 8 abuts against the sliding groove 51 on the back (rear) of the movable support 5 of the movable pedal. When the fixed pipe 7 moves forwards (i.e. advances), the connecting rod 8 is driven to move upwards (i.e. swing) obliquely against the movable bracket 5 and the pedal 52; when the fixed tube 7 moves backward (i.e. retreats), the movable support 5 and the foot pedal 52 fall down due to gravity along with the retreating of the fixed tube 7 and the connecting rod 8 driven by the fixed tube.

The connecting rod 8 is unlocked by rotating the locking collar 9, the connecting rod 8 is separated from the clamping groove on the back surface of the movable support 5 and is retracted, and then the movable support 5 and the pedal 52 do not move along with the driving shaft 1, the rotating piece, the transmission mechanism and the sliding block 6, and are always kept in a static state.

As an implementation common to the above embodiments, the movable pedal further includes:

the limiting piece 53 is arranged on the movable bracket 5; the main body frame 4 is provided with a guide stopper 41 which is engaged with the stopper 53 and guides and limits the stopper 53.

As a common implementation of the above embodiments one to five, the wheelchair pedal 52 movement device further includes:

the clutch mechanism is arranged on the driving shaft 1, and the driving crank 11 is arranged on the clutch mechanism. The pedal 52 is stationary when the clutch mechanism is disengaged from the drive crank 11 and moves in synchronism with the pedal 52 when the drive crank 11 is engaged. Specifically, a hug releasing device is arranged at the inner axle center of the driving crank 11, when the movable pedal is needed to be used, the hug releasing device triggers the hug through a pull piece arranged on a handrail or a hand-push handle on a main body frame 4 of the wheelchair, so that the axle center of the driving crank 11 is tightly combined with the driving shaft 1, the belt and the driving crank 11 rotate along with the driving wheel 2 and the driving shaft 1, and the movable pedal is driven to synchronously move; when the movable pedal is not needed, the holding and releasing device is triggered and released through the pulling piece, and at the moment, the driving crank 11 is separated from contact with the driving shaft 1 and is in a relatively released state with the driving shaft 1, and the movable pedal stops moving. The clutch mechanism can easily switch between the motion and the stationary state of the foot pedal 52.

As an embodiment common to the above embodiments, one end of the ejector rod 62 is provided with a ball or small bearing that can be fitted with the chute 51.

As an implementation common to the above embodiments, the rotating member is mounted at the rotation shaft inside either side driving wheel 2 or at the rotation shaft inside both side driving wheels 2. In one embodiment, the rotating parts are arranged at two ends of the same driving shaft 1, which are close to the driving wheels 2 at two sides; in another embodiment, the two driving wheels 2 may be correspondingly driven by two driving shafts 1 disposed on two sides of the main body frame 4, and one rotating member is mounted on one side of one of the driving shafts 1 near the corresponding driving wheel 2, or two rotating members are respectively mounted on one ends of the two driving shafts 1 near the corresponding driving wheel 2.

As a common implementation of the above embodiments, the foot rest 52 may be provided with a turning shaft with a power device or without a power device, realizing a turning motion of the foot rest 52 independent of the above back-and-forth linear motion and up-and-down swing.

As an embodiment common to the above respective examples, the extending direction of the slide guide 3 is a horizontal direction, and a guide structure of a guide groove or rail may be employed, and the linear movement of the slide assembly is a horizontal movement.

As a common implementation manner of the above embodiments, two rotating members are respectively and correspondingly arranged on two sides of the main body frame 4 (may be the same driving shaft 1 or on two driving shafts 1), and the two rotating members respectively drive two movable pedals, and the two movable pedals can be set to move synchronously or asynchronously according to actual requirements.

As an implementation manner common to the above embodiments, one of the pair of rotating shafts of the wheelchair, which is disposed at the rear portion of the main body frame 4, is the driving shaft 1, and the other rotating shaft, which is disposed at the front portion of the main body frame 4, is the driven shaft, that is, the wheelchair is a rear-mounted driving wheel 2 type wheelchair, and a conventional wheelchair layout is adopted.

In another embodiment, one of the pair of rotating shafts of the wheelchair is a driving shaft 1, and the other rotating shaft is a driven shaft, which is arranged at the front part of the main body frame 4, and the wheelchair is a front driving wheel 2 type wheelchair, at this time, the space used by a transmission mechanism which is a core part of the wheelchair pedal 52 moving device is smaller, the wheelchair structure is more compact, and the flexibility of other function settings is higher.

The wheelchair provided by the utility model can be suitable for a hand-push type or electric wheelchair.

The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the utility model.

Claims (10)

1. A wheelchair pedal activity device, comprising:

at least one rotating piece fixedly arranged on a driving shaft of a driving wheel of the wheelchair;

a sliding guide installed on a main body frame of the wheelchair and located in front of the driving shaft;

a movable pedal provided in front of the slide guide;

a sliding assembly mounted to the sliding guide and connected to the movable pedal;

the transmission mechanism is connected between the rotating piece and the sliding component, and can convert the rotating motion of the rotating piece around the driving shaft into the linear motion of the sliding component along the sliding guide piece and drive the movable pedal to reciprocate.

2. The wheelchair pedal activity of claim 1 wherein the activity pedal comprises:

one end of the movable support is hinged to the main body frame, the movable support is provided with a sliding groove, and one end of the sliding component is movably connected in the sliding groove;

a foot pedal arranged at the other end of the movable bracket;

the sliding component can drive the movable support to swing reciprocally around one end of the movable support hinged to the main body frame.

3. The wheelchair pedal movement apparatus of claim 1 wherein the movable pedal is fixedly coupled to an end of the slide assembly remote from the drive shaft, the slide assembly being adapted to drive the movable pedal to reciprocate in the direction of linear movement.

4. The wheelchair pedal activity of claim 2 wherein the activity pedal further comprises:

the limiting piece is arranged on the movable bracket;

the main body is provided with a guiding limiting piece which can be matched with the limiting piece and guide and limit the limiting piece.

5. The wheelchair pedal activity of any one of claims 1-4 wherein the slide assembly comprises:

a slider mounted on the sliding guide;

the locking mechanism is arranged on the sliding block;

one end of the ejector rod is arranged on the sliding guide piece and penetrates through the sliding block, and the other end of the ejector rod is connected with the movable pedal;

the ejector rods are provided with a plurality of positioning holes at intervals, and the sliding blocks can be fixedly connected to the ejector rods through the matching of the locking mechanisms and the positioning holes, or are separated from the ejector rods through the matching of the locking mechanisms and the positioning holes.

6. The wheelchair pedal activity of any one of claims 1-4 wherein the slide assembly comprises:

the fixed pipe is movably connected to the transmission mechanism, one end of the fixed pipe, which is far away from the driving shaft, is provided with external threads, and a plurality of elastic clamping pieces are arranged at intervals along the periphery of the opening of the fixed pipe, which is far away from the driving shaft;

one end of the connecting rod is connected with the movable pedal, and the other end of the connecting rod stretches into the fixed pipe;

the locking sleeve ring is sleeved on the connecting rod, one end of the locking sleeve ring is provided with an internal thread matched with the external thread, the other end of the locking sleeve ring is provided with a taper inner side surface, and the taper inner side surface can be matched with the external thread through the internal thread to enable the connecting rod to stretch out to be connected with the movable pedal to be tightly pressed by the elastic clamping piece or be loosened so as to enable the connecting rod to be separated from the movable pedal and retract.

7. The wheelchair pedal activity of any one of claims 1 to 4 wherein the rotating member is a drive crank and the transmission mechanism is a linkage mechanism comprising at least one link, one end of the linkage mechanism being hinged to the drive crank and the other end of the linkage mechanism being hinged to the slide assembly.

8. The wheelchair pedal activity of claim 7 wherein the linkage comprises:

one end of the first connecting rod is hinged to the driving crank;

a supporting hole is formed between two ends of the lever, the supporting hole is hinged with a supporting shaft arranged on the main body frame, and one end of the lever is hinged with the other end of the first connecting rod;

and one end of the second connecting rod is hinged to the other end of the lever, and the other end of the second connecting rod is hinged to the sliding assembly.

9. The wheelchair pedal activity of any one of claims 1-4 wherein the swivel member is a drive crank, the drive mechanism is a scotch yoke mechanism, one end of the scotch yoke mechanism is movably connected to the drive crank, and the other end of the scotch yoke mechanism is hinged to the slide assembly.

10. The wheelchair pedal activity of any one of claims 1-4 wherein the rotating member is a drive gear and the transmission comprises:

the driven gear is arranged on the main body frame through a driven gear shaft;

the driven crank is arranged on the driven gear shaft;

and one end of the fourth connecting rod is hinged to the driven crank, and the other end of the fourth connecting rod is hinged to the sliding assembly.