Wheelchair pedal adjustment mechanism and wheelchair

Abstract

The present invention discloses a wheelchair pedal adjustment mechanism and a wheelchair, comprising a leg board mechanism, a pedal height adjustment mechanism and a pedal angle adjustment mechanism both of which are installed on the leg board mechanism; two pedals are symmetrically arranged on the output end of the pedal height adjustment mechanism, and the pedal height adjustment mechanism is used to drive the pedal to move vertically; the pedal is connected to the output end of the pedal height adjustment mechanism through a pedal shaft; the output end of the pedal angle adjustment mechanism is connected to the input end of the pedal shaft, and is used to adjust the angle between the pedal and the horizontal plane; the present invention realizes the adjustment of the height of the pedal by arranging the pedal height adjustment mechanism; and realizes the adjustment of the angle between the pedal and the horizontal plane by arranging the pedal angle adjustment mechanism, and can adjust the pedal position according to different users' height and sitting postures, and has a simple structure, stable operation, and high safety and comfort performance.

Description

Technical Field

[0001] The present invention belongs to the technical field of wheelchair devices, and in particular relates to a wheelchair pedal adjustment mechanism and a wheelchair. Background Art

[0002] Faced with the accelerating aging of the domestic population and the increasing disability rate caused by traffic accidents, the demand for wheelchairs in the market is increasing. However, the existing wheelchairs cannot be customized according to each person's height and sitting posture due to factory production, and users cannot adjust the pedal position to provide them with the best pedal position. In order to improve the comfort of wheelchairs for disabled people, wheelchair pedal adjustment mechanisms will be particularly needed in the future. Summary of the invention

[0003] In view of the technical problems existing in the prior art, the present invention provides a wheelchair pedal adjustment mechanism and a wheelchair to solve the technical problems that the pedals of the prior wheelchair cannot be adjusted and the comfort level is low.

[0004] In order to achieve the above object, the technical solution adopted by the present invention is:

[0005] The present invention provides a pedal adjustment mechanism for a wheelchair, comprising a leg board mechanism, a pedal height adjustment mechanism, a pedal angle adjustment mechanism, two pedals and a pedal rotating shaft, wherein the pedal height adjustment mechanism and the pedal angle adjustment mechanism are both installed on the leg board mechanism; the two pedals are symmetrically arranged on the output end of the pedal height adjustment mechanism, and the pedal height adjustment mechanism is used to drive the pedal to move vertically; the pedal is connected to the output end of the pedal height adjustment mechanism through the pedal rotating shaft, one end of the pedal rotating shaft is fixedly connected to the pedal, and the other end is rotatably connected to the output end of the rubbing pedal height adjustment mechanism; the output end of the pedal angle adjustment mechanism is connected to the input end of the pedal rotating shaft, and is used to adjust the angle between the pedal and the horizontal plane.

[0006] Furthermore, the pedal height adjustment mechanism includes a height drive motor, a first angler, a first screw rod, a first screw rod nut, a height adjustment connecting plate and a bearing fixing plate; the height drive motor is fixedly arranged on the leg board mechanism, the output end of the height drive motor is connected to the first input end of the first angler, the first screw rod is vertically arranged in the middle of the leg board mechanism, the upper end of the first screw rod is connected to the output end of the first angler, and the first screw rod nut is movably sleeved on the first screw rod; the height adjustment connecting plate is horizontally arranged, and the middle part of the height adjustment connecting plate is fixedly connected to the first screw rod nut; the two ends of one side of the height adjustment connecting plate are vertically slidingly connected to the leg board mechanism, and the two ends of the other side of the height adjustment connecting plate are respectively provided with bearing fixing plates, and the pedal shaft is horizontally rotated and arranged on the bearing fixing plate.

[0007] Furthermore, the pedal height adjustment mechanism also includes a first manual knob and a first knob connecting shaft; one end of the first knob connecting shaft is fixedly connected to the first manual knob, and the other end is connected to the second input end of the first angle gauge.

[0008] Furthermore, the first angle turner includes a first bevel gear, a second bevel gear, a third bevel gear, a fourth bevel gear and a first angle turner housing. The first bevel gear, the second bevel gear, the third bevel gear and the fourth bevel gear are all arranged in the first angle turner housing and are meshed in sequence to form a rectangular connection; the output end of the height drive motor is connected to the first bevel gear, the upper end of the first screw rod is connected to the fourth bevel gear, the first bevel gear is meshed with the fourth bevel gear, and the rotation axis of the first bevel gear and the fourth bevel gear are perpendicular.

[0009] Furthermore, the pedal angle adjustment mechanism includes an angle driving motor, a second angle turner, a second screw rod, a second screw rod nut, an angle adjustment connecting plate, a sliding connecting plate, an angle adjustment connecting rod and an angle driving connecting rod; the angle driving motor and the second angle turner are both vertically slidably arranged on the leg board mechanism, the output end of the angle driving motor is connected to the first input end of the second angle turner, the second screw rod is vertically arranged, and the upper end of the second screw rod is connected to the output end of the second angle turner; the second screw rod nut is movably sleeved on the second screw rod, the angle adjustment connecting plate is horizontally fixed on the second screw rod nut, and the two ends of the angle adjustment connecting plate are respectively vertically slidably connected to the leg board mechanism through the sliding connecting plate; the sliding connecting plate is arranged correspondingly to the foot pedal up and down, one end of the angle adjustment connecting rod is connected to the sliding connecting plate, the other end of the angle adjustment connecting rod is rotatably connected to one end of the angle driving connecting rod, and the other end of the angle driving connecting rod is fixedly connected to the input end of the pedal shaft.

[0010] Furthermore, the pedal angle adjustment mechanism also includes a second manual knob and a second knob connecting shaft; one end of the second knob connecting shaft is connected to the second manual knob, and the other end is connected to the second input end of the second angle meter.

[0011] Furthermore, the pedal angle adjustment mechanism also includes a corner turner fixing plate and an angle drive motor fixing plate, the corner turner fixing plate is vertically slidably set on the leg board mechanism, one end of the corner turner fixing plate is vertically slidably connected to the leg board mechanism, and the other end is fixedly connected to the pedal height adjustment mechanism, and the second corner turner is fixedly set on the corner turner fixing plate; the angle drive motor fixing plate is horizontally set, one end of the angle drive motor fixing plate is vertically slidably connected to the leg board mechanism, and the other end is fixedly connected to the corner turner fixing plate, and the angle drive motor is fixedly set on the angle drive motor fixing plate.

[0012] Furthermore, the second angle turner includes a fifth bevel gear, a sixth bevel gear, a seventh bevel gear, an eighth bevel gear and a second angle turner housing. The fifth bevel gear, the sixth bevel gear, the seventh bevel gear and the eighth bevel gear are all arranged in the second angle turner housing and are meshed in sequence to form a rectangular connection; the output end of the angle drive motor is connected to the fifth bevel gear, the upper end of the second screw rod is connected to the eighth bevel gear, the fifth bevel gear is meshed with the eighth bevel gear, and the rotation axis of the fifth bevel gear and the eighth bevel gear are perpendicular.

[0013] Furthermore, the leg board mechanism includes two vertical slide rails, two horizontal connecting beams, a height adjustment mechanism mounting seat and an angle adjustment mechanism mounting seat. The two vertical slide rails are vertically arranged in parallel, and the two horizontal connecting beams are horizontally fixed at the upper and lower ends of the two vertical slide rails; the height adjustment mechanism mounting seat is vertically arranged in the middle of the two vertical slide rails, the pedal height adjustment mechanism is installed on the height adjustment mechanism mounting seat, and the two sides of the pedal height adjustment mechanism are vertically slidably connected to the two vertical slide rails; the angle adjustment mechanism mounting seat is vertically arranged between the two vertical slide rails and parallelly arranged on one side of the height adjustment mechanism mounting seat, the pedal angle adjustment mechanism is slidably installed on the angle adjustment mechanism mounting seat, and the two ends of the pedal angle adjustment mechanism are respectively vertically slidably connected to the two vertical slide rails.

[0014] The present invention also provides a wheelchair, comprising a wheelchair body and a wheelchair pedal adjustment mechanism, wherein the wheelchair pedal adjustment mechanism is fixedly mounted at the front end of the wheelchair body.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] The present invention provides a wheelchair pedal adjustment mechanism, which realizes adjustment of the height of the pedal by setting a pedal height adjustment mechanism; and realizes adjustment of the angle between the pedal and the horizontal plane by setting a pedal angle adjustment mechanism. The pedal position can be adjusted according to the height and sitting posture of different users, and the structure is simple, the operation is stable, and the safety and comfort performance are high.

[0017] Furthermore, the pedal height adjustment mechanism utilizes a combination of a screw mechanism and an angle adjuster, and through the vertical movement of the screw nut on the screw, it drives the pedal to move up and down in the vertical direction. It has a simple structure, high stability in the adjustment process, and good safety.

[0018] Furthermore, by providing a manual knob and a knob connecting shaft in the pedal height adjustment mechanism, the manual knob is used to provide power to the angle adjuster, and the power is transmitted to the first screw rod through the angle adjuster, manual adjustment of the pedal height is achieved, thereby improving the flexibility of the mechanism.

[0019] Furthermore, the pedal angle adjustment mechanism utilizes a combination of a screw mechanism and an angle adjuster, and the vertical movement of the screw nut on the screw drives the angle adjustment connecting plate and the sliding connecting plate to move in the vertical direction, and then drives the pedal shaft to rotate around itself through the angle adjustment connecting rod and the angle driving connecting rod, thereby driving the pedal to rotate around the pedal shaft, and realizing the adjustment of the angle between the pedal and the horizontal plane. The structure is simple, the adjustment process is highly stable, and the safety is good.

[0020] Furthermore, by providing a manual knob and a knob connecting shaft in the pedal angle adjustment mechanism, the manual knob is used to provide power to the angle adjuster, and the power is transmitted to the second screw rod through the angle adjuster, manual adjustment of the pedal angle is achieved, thereby improving the flexibility of the mechanism.

[0021] Furthermore, both the first angle turner and the second angle turner use four bevel gears meshing with each other to form a 90° angle turner, using the two bevel gears at both ends as power input ends and one end as a power transmission output end, thereby achieving a change in the power transmission direction and providing conditions for two modes of manual adjustment and motor adjustment.

[0022] The present invention also provides a wheelchair, which realizes the adjustment of the height and angle of the pedal on the wheelchair by arranging a pedal adjustment mechanism on the wheelchair body to meet the needs of different users' heights and sitting habits. It has a simple structure, high practicality and high comfort. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the overall structure of the wheelchair pedal adjustment mechanism of the present invention;

[0024] Figure 2 It is a structural schematic diagram of the leg board mechanism in the wheelchair pedal adjustment mechanism of the present invention;

[0025] Figure 3 It is a schematic structural diagram of a pedal height adjustment mechanism in the wheelchair pedal adjustment mechanism of the present invention;

[0026] Figure 4 It is a schematic plan view of the structure of the pedal angle adjustment mechanism in the wheelchair pedal adjustment mechanism of the present invention;

[0027] Figure 5 It is a schematic diagram of the three-dimensional structure of the pedal angle adjustment mechanism in the wheelchair pedal adjustment structure of the present invention;

[0028] Figure 6 It is a partial schematic diagram of a pedal height adjustment mechanism in the wheelchair pedal adjustment mechanism of the present invention;

[0029] Figure 7It is a partial schematic diagram of a pedal angle adjustment mechanism in the wheelchair pedal adjustment mechanism of the present invention;

[0030] Figure 8 It is a schematic diagram of the internal structure of the first angle device in the wheelchair pedal adjustment mechanism of the present invention.

[0031] Among them, 1 leg board mechanism, 2 pedal height adjustment mechanism, 3 pedal angle adjustment mechanism, 4 pedal, 5 pedal shaft; 11 vertical slide rail, 12 horizontal connecting beam, 13 height adjustment mechanism mounting seat, 14 angle adjustment mechanism mounting seat, 15 angle adjustment mechanism slide rail; 21 height drive motor, 22 first angler, 23 first screw rod, 24 first screw rod nut, 25 height adjustment connecting plate, 26 bearing fixing plate, 27 pedal fixing plate, 28 first motor drive shaft, 29 first manual knob, 210 first knob connecting shaft, 211 the first slider, 212 the first knob bracket; 31 the angle drive motor, 32 the second angler, 33 the second screw, 34 the second screw nut, 35 the angle adjustment connecting plate, 36 the sliding connecting plate, 37 the angle adjustment connecting rod, 38 the angle drive connecting rod, 39 the angler fixing plate, 310 the second knob fixing plate, 311 the angle drive motor fixing plate, 312 the second motor drive shaft, 313 the second manual knob, 314 the second knob connecting shaft, 315 the second knob bracket, 316 the second slider, 317 the third slider. DETAILED DESCRIPTION

[0032] In order to make the technical problems, technical solutions and beneficial effects solved by the present invention more clearly understood, the present invention is further described in detail in the following specific embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0033] As attached Figure 1-8As shown, the present invention provides a wheelchair pedal adjustment mechanism, comprising a leg board mechanism 1, a pedal height adjustment mechanism 2, a pedal angle adjustment mechanism 3, two pedals 4 and a pedal rotation shaft 5, wherein the pedal height adjustment mechanism 2 and the pedal angle adjustment mechanism 3 are both mounted on the leg board mechanism 1; the two pedals 4 are symmetrically arranged on the output end of the pedal height adjustment mechanism 2, and the pedal height adjustment mechanism 2 is used to drive the pedal 4 to move vertically; the pedal 4 is connected to the output end of the pedal height adjustment mechanism 2 via the pedal rotation shaft 5, one end of the pedal rotation shaft 5 is fixedly connected to the pedal 4, and the other end is connected to the pedal height adjustment mechanism 2 The output end of the adjustment mechanism 2 is rotationally connected; the output end of the pedal angle adjustment mechanism 3 is connected to the input end of the pedal shaft 5, and the pedal angle adjustment mechanism 3 is used to drive the pedal shaft 5 to rotate horizontally, thereby adjusting the angle between the pedal 4 and the horizontal plane; the present invention realizes the adjustment of the vertical height position of the pedal 4 by setting the pedal height adjustment mechanism 2; the pedal angle adjustment mechanism 3 is set to adjust the angle between the pedal 4 and the horizontal plane, and the pedal position can be adjusted according to the height and sitting posture of different users. It has a simple structure, stable operation, and high safety and comfort performance.

[0034] The leg board mechanism 1 includes two vertical slide rails 11, two horizontal connecting beams 12, a height adjustment mechanism mounting seat 13, an angle adjustment mechanism mounting seat 14 and an angle adjustment mechanism slide rail 15; the two vertical slide rails 11 are vertically arranged in parallel, and the two horizontal connecting beams 12 are horizontally fixedly arranged at the upper and lower ends of the two vertical slide rails 11, and the vertical slide rails 11 and the horizontal connecting beams 12 are sequentially connected to form a rectangular frame structure; the height adjustment mechanism mounting seat 13 is vertically arranged in the middle of the two vertical slide rails 11, and the upper and lower ends of the height adjustment mechanism mounting seat 13 are respectively fixedly connected to the two horizontal connecting beams 12; the pedal height adjustment mechanism 2 is installed on the height adjustment mechanism mounting seat 13, and the two sides of the pedal height adjustment mechanism 2 are vertically slidably connected with the two vertical slide rails 11 The angle adjustment mechanism mounting seat 14 is vertically fixed between the two vertical slide rails 11 and is arranged in parallel on one side of the height adjustment mechanism mounting seat 13. The upper and lower ends of the angle adjustment mechanism mounting seat 14 are respectively fixedly connected to the two horizontal connecting beams 12; the pedal angle adjustment mechanism 3 is slidably installed on the angle adjustment mechanism mounting seat 14, and an angle adjustment mechanism slide rail 15 is arranged between the pedal angle adjustment mechanism 3 and the angle adjustment mechanism mounting seat 14. One side of the angle adjustment slide rail 15 is fixedly connected to the angle adjustment mechanism mounting seat 14, and the other side is slidably connected to the pedal angle adjustment mechanism 3. The axis of the angle adjustment mechanism slide rail 15 is vertically arranged; the two ends of the pedal angle adjustment mechanism 3 are respectively vertically slidably connected to the two vertical slide rails 11.

[0035] The pedal height adjustment mechanism 2 includes a height drive motor 21, a first angle meter 22, a first screw rod 23, a first screw rod nut 24, a height adjustment connecting plate 25, a bearing fixing plate 26, a pedal fixing plate 27, a first motor drive shaft 28, a first manual knob 29, a first knob connecting shaft 210, a first slider 211 and a first knob bracket 212.

[0036] The height drive motor 21 is fixedly set on the angle adjustment mechanism mounting base 14, and the output end of the height drive motor 21 is horizontally set; the first angler 22 is fixedly installed on the height adjustment mechanism mounting base 13, and the first motor drive shaft 28 is horizontally set between the height drive motor 21 and the first angler 22; one end of the first motor drive shaft 28 is connected to the output end of the height drive motor 21, and the other end is connected to the first input end of the first angler 22; the first knob connecting shaft 210 is horizontally set on the other side of the first angler 22, one end of the first knob connecting shaft 210 is connected to the second input end of the first angler 22, and the other end is installed on the side of one of the vertical slide rails 11 through the first knob bracket 212, the first knob connecting shaft 210 is rotatably connected to the first knob bracket 212, and the first manual knob 29 is fixedly set at the end of the first knob connecting shaft 210.

[0037] The first screw rod 23 is vertically arranged on the height adjustment mechanism mounting seat 13, the upper end of the first screw rod 23 is connected to the output end of the first angler 22, the lower end of the first screw rod 23 is installed on the lower horizontal connecting beam 12 through a screw rod bracket, and the first screw rod 23 is rotatably connected to the screw rod bracket; the first screw rod nut 24 is movably sleeved on the first screw rod 23, the height adjustment connecting plate 25 is horizontally arranged, and the middle part of the height adjustment connecting plate 25 is fixedly connected to the first screw rod nut 24; both ends of one side of the height adjustment connecting plate 25 are connected to the vertical The slide rail 11 is vertically slidably connected, and a first slider 211 is arranged at the end of the height adjustment connecting plate 25, and the first slider 211 is slidably connected to the vertical slide rail 11; bearing fixing plates 26 are respectively arranged at both ends of the other side of the height adjustment connecting plate 25, and the pedal shaft 5 is horizontally rotatably arranged on the bearing fixing plate 26; one end of the pedal shaft 5 is rotatably connected to the bearing fixing plate 26, and the other end is fixedly connected to the pedal fixing plate 27, and the pedal 4 is fixedly installed on the pedal shaft 5 and is arranged on the pedal fixing plate 27.

[0038] The first angler 22 includes a first bevel gear, a second bevel gear, a third bevel gear, a fourth bevel gear and a first angler housing. The first bevel gear, the second bevel gear, the third bevel gear and the fourth bevel gear are all arranged in the first angler housing and are meshed in sequence to form a rectangular connection; one end of the first motor drive shaft 28 is connected to the output end of the height drive motor 21, and the other end passes through the first angler housing and is connected to the first bevel gear; the upper end of the first screw rod 23 passes through the first angle housing and is connected to the fourth bevel gear, the first bevel gear is meshed with the fourth bevel gear, and the rotation axis of the first bevel gear and the fourth bevel gear is perpendicular; the first knob is connected The connecting shaft passes through the first angler housing and is connected to the third bevel gear, and the rotation axis of the third bevel gear coincides with the rotation axis of the first bevel gear; when the height drive motor rotates, the first motor drive shaft 28 drives the first bevel gear to rotate, and when the first bevel gear rotates, it drives the fourth bevel gear meshing with it to rotate, thereby realizing the rotation of the first screw rod; when the first manual knob is screwed, the first manual knob drives the third bevel gear to rotate through the first knob connecting shaft, and when the third bevel gear rotates, it drives the fourth bevel gear meshing with it to rotate, thereby realizing the rotation of the first screw rod, realizing the change of power transmission direction, and ensuring the effectiveness of power transmission.

[0039] The pedal angle adjustment mechanism 3 includes an angle drive motor 31, a second angle adjuster 32, a second screw rod 33, a second screw rod nut 34, an angle adjustment connecting plate 35, a sliding connecting plate 36, an angle adjustment connecting rod 37, an angle drive connecting rod 38, an angle adjuster fixing plate 39, a second knob fixing plate 310, an angle drive motor fixing plate 311, a second motor drive shaft 312, a second manual knob 313, a second knob connecting shaft 314, a second knob bracket 315, a second slider 316 and a third slider 317.

[0040] The angler fixing plate 39 is arranged vertically, and the upper end of the angler fixing plate 39 is slidably connected to the angle adjustment mechanism slide rail 15, and the lower end of the angler 39 is fixedly connected to the height adjustment connecting plate 25; when the height adjustment connecting plate 25 moves vertically up and down, it can drive the angler fixing plate 39 to move vertically up and down along the angle adjustment mechanism slide rail 15; the angle drive motor fixing plate 311 is horizontally arranged on one side of the upper end of the angler fixing plate 39, and one end of the angle drive motor fixing plate 311 is fixedly connected to the angler fixing plate 39 The second knob fixing plate 310 is horizontally arranged on the other side of the upper end of the angler fixing plate 39, one end of the second knob fixing plate 310 is fixedly connected to the angler fixing plate 39, and the other end is vertically slidably connected to another vertical slide rail 11; the ends of the angle drive motor fixing plate 311 and the second knob fixing plate 310 are both provided with second sliders 316, and the two second sliders 316 are respectively slidably connected to the two vertical slide rails 11.

[0041] The angle drive motor 31 is fixedly set on the angle drive motor fixing plate 311, and the output end of the angle drive motor 31 is horizontally set; the second angle turner 32 is fixedly set on the angle turner fixing plate 39, and the second motor drive shaft 312 is horizontally set between the angle drive motor 31 and the second angle turner 32, one end of the second motor drive shaft 312 is connected to the output end of the angle drive motor 31, and the other end is connected to the first input end of the second angle turner 32.

[0042] The second knob connecting shaft 314 is horizontally arranged on the second knob fixing plate 310 through the second knob bracket 315, one end of the second knob connecting shaft 314 is connected to the second input end of the second angle meter 32, and the other end is rotatably connected to the second knob bracket 315; the second manual knob 313 is fixedly arranged at the end of the second knob connecting shaft 314.

[0043] The second screw rod 33 is arranged vertically, and the upper end of the second screw rod 33 is connected to the output end of the second angle meter 32; the second screw rod nut 34 is movably sleeved on the second screw rod 33, and the angle adjustment connecting plate 35 is horizontally fixed on the second screw rod nut 34, and sliding connecting plates 36 are respectively provided at both ends of the angle adjustment connecting plate 35, one end of the sliding connecting plate 36 is fixedly connected to the angle adjustment plate 5, and the other end is vertically slidably connected to the vertical slide rail 11; each sliding connecting plate 36 is respectively provided with a third sliding block 317, and the third sliding block 317 is slidably connected to the vertical slide rail 11; the sliding connecting plate 36 and the foot pedal 4 are arranged correspondingly up and down, one end of the angle adjustment connecting rod 37 is connected to the sliding connecting plate 36, and the other end of the angle adjustment connecting rod 37 is rotatably connected to one end of the angle driving connecting rod 38, and the other end of the angle driving connecting rod 38 is fixedly connected to the input end of the pedal shaft 5; preferably, the angle driving connecting rod 37 adopts an L-shaped rod.

[0044] The structural principle of the second angler 32 is basically the same as that of the first angler 22. The second angler 32 includes a fifth bevel gear, a sixth bevel gear, a seventh bevel gear, an eighth bevel gear and a second angler housing. The fifth bevel gear, the sixth bevel gear, the seventh bevel gear and the eighth bevel gear are all arranged in the second angler housing and are meshed in sequence to form a rectangular connection; one end of the second motor drive shaft is connected to the output end of the angle drive motor, and the other end passes through the second angler housing and is connected to the fifth bevel gear; the upper end of the second screw rod passes through the second angle housing and is connected to the eighth bevel gear, the fifth bevel gear is meshed with the eighth bevel gear, and the rotation of the fifth bevel gear and the eighth bevel gear The driving axis is vertical; the second knob connecting shaft passes through the second angle gauge housing and is connected to the seventh bevel gear, and the rotation axis of the seventh bevel gear coincides with the rotation axis of the fifth bevel gear; when the height driving motor rotates, the fifth bevel gear is driven to rotate through the second motor driving shaft. When the fifth bevel gear rotates, the eighth bevel gear meshing with it is driven to rotate, thereby realizing the rotation of the second screw rod; when the second manual knob is screwed, the second manual knob drives the seventh bevel gear to rotate through the second knob connecting shaft. When the seventh bevel gear rotates, it drives the eighth bevel gear meshing with it to rotate, thereby realizing the rotation of the second screw rod, realizing the change of power transmission direction, and ensuring the effectiveness of power transmission.

[0045] The present invention also provides a wheelchair, comprising a wheelchair body and a wheelchair pedal adjustment mechanism, wherein the wheelchair pedal adjustment mechanism is fixedly mounted at the front end of the wheelchair body; by arranging the pedal adjustment mechanism on the wheelchair body, the height and angle of the pedal on the wheelchair can be adjusted to meet the needs of different users' heights and sitting habits, with a simple structure, high practicality and high comfort.

[0046] The wheelchair pedal adjustment mechanism described in the present invention is characterized in that a pedal height adjustment mechanism is provided, and the pedal height adjustment mechanism adopts a height adjustment screw mechanism combined with a corner gauge, which has a simple structure, stable operation and good safety performance; the height adjustment screw mechanism is powered by a height drive motor and a manual knob, and can flexibly realize two adjustment modes of manual adjustment and automatic adjustment of the pedal height, which well meets the needs of different users' sitting heights; the pedal angle adjustment mechanism is provided, and the pedal angle adjustment mechanism adopts an angle adjustment screw mechanism combined with a corner gauge, and the angle adjustment screw mechanism is powered by a height drive motor and a manual knob, and two adjustment modes of manual adjustment and automatic adjustment of the pedal inclination angle are realized, which meets the requirements of different users' heights and habits during use, and has good practicality; the wheelchair described in the present invention can flexibly adjust the height and angle of the wheelchair pedal according to the height and habits of the wheelchair user, making the user more comfortable to use and well meeting the user's usage needs.

[0047] How it works

[0048] The wheelchair pedal adjustment mechanism described in the present invention can realize height adjustment by driving force of the pedal height adjustment mechanism through a height drive motor and a second manual knob; the driving force provided by the manual and height drive motors is transmitted to the first screw rod through a first angle gauge, driving the first screw rod to rotate around its own axis, the first screw rod mechanism is connected to the first screw rod nut through a thread, and a height adjustment connecting plate is provided on the first screw rod nut, so that the height adjustment connecting plate is caused to slide vertically up and down, and the height adjustment connecting plate is fixed as a whole with a pedal fixing plate through threaded bolts, and the pedal is connected to the pedal fixing plate through a pedal rotating shaft, and the sliding of the height adjustment plate drives the pedal to slide, thereby realizing the vertical up and down sliding of the pedal, and further realizing the adjustment of the pedal height.

[0049] One end of the angle adjuster fixing plate in the pedal angle adjustment mechanism is fixedly connected to the height adjustment connecting plate by a bolt, and the other end is slidably connected to the angle adjustment mechanism slide rail; when the height adjustment connecting plate slides, the angle adjuster fixing plate drives the pedal angle adjustment mechanism to slide; when the pedal height adjustment is completed, the driving force for angle adjustment in the pedal angle adjustment mechanism can use an angle driving motor or a second manual knob to achieve automatic adjustment, and the manual and motor driving force is transmitted to the second screw rod through the second angle adjuster, and the second screw rod nut on the second screw rod drives the angle adjustment connecting plate through threaded cooperation, so that the angle adjustment connecting plate slides vertically up and down, and the sliding of the angle adjustment connecting plate drives the angle adjustment connecting rod to rotate, and the rotation of the angle adjustment connecting rod drives the angle adjustment driving rod to rotate, and the angle adjustment driving rod drives the pedal shaft to rotate, and the pedal shaft is fixedly connected to the pedal by a threaded structure, and the rotation of the pedal shaft drives the pedal to rotate, thereby realizing the angle adjustment of the pedal.

[0050] A wheelchair pedal adjustment mechanism described in the present invention comprises a leg board mechanism, a pedal height adjustment mechanism, a pedal angle adjustment mechanism, a pedal and a pedal rotating shaft; the pedal height adjustment mechanism is provided with a first angle gauge at the central axis position of the leg board mechanism, the first input end of the first angle gauge is connected to the first motor connecting shaft, the second input end of the first angle gauge is connected to the first manual knob connecting shaft via the first knob connecting shaft, the output end of the first angle gauge is connected to the first screw rod, and the first screw rod is vertically arranged; the first screw rod is matched and connected with the first screw rod nut; the first screw rod nut is fixed in the middle of the height adjustment connecting plate, a bearing fixing plate is symmetrically arranged on one side of the height adjustment connecting plate, a pedal fixing plate is symmetrically arranged on the other side of the height adjustment connecting plate, a first slider is arranged on the pedal fixing plate, and the first slider is connected to the vertical slide rails on the left and right sides of the leg board mechanism.

[0051] The pedal angle adjustment mechanism is provided with a second angle gauge at a position where the leg board mechanism deviates from the central axis, the second angle gauge is fixedly connected to the angle gauge fixing plate, the angle gauge fixing plate is connected to the angle adjustment mechanism slide rail, a first input end of the second angle gauge is connected to one end of the second motor drive shaft, the other end of the second motor drive shaft is fixedly connected to the angle drive motor, the angle drive motor is fixedly arranged on the angle drive motor fixing plate, the angle drive motor fixing plate is connected to the vertical slide rail, a second input end of the second angle gauge is connected to the second manual knob through a second knob connecting shaft, and the second knob connecting shaft is installed on the second knob fixing shaft through a knob bracket. On the fixed plate, the second knob fixing plate is slidably connected to the vertical slide rail; the output end of the second angler is connected to the second screw rod, and the second screw rod is vertically arranged; the second screw rod nut is cooperatively connected to the second screw rod; the angle adjustment connecting plate is horizontally fixed on the second screw rod nut, and sliding connecting plates are respectively arranged at the left and right ends of the angle connecting plate, and the sliding connecting plate is fixedly connected to the sliding connecting plate, and the sliding connecting plate is connected to the vertical slide rail; the sliding connecting plate is connected to the angle adjustment connecting rod through a hexagonal nut, the angle adjustment connecting rod is rotatably connected to the angle driving connecting rod, the angle driving connecting rod is connected to the pedal shaft through a threaded structure, and the pedal shaft is connected to the pedal through a threaded structure.

[0052] The wheelchair pedal adjustment mechanism and the wheelchair described in the present invention realize the adjustment of the height of the pedal by providing a pedal height adjustment mechanism; and realize the adjustment of the angle between the pedal and the horizontal plane by providing a pedal angle adjustment mechanism. The pedal position can be adjusted according to the height and sitting posture of different users, and the structure is simple, the operation is stable, and the safety and comfort performance are high.

[0053] The above embodiment is only one of the implementation methods that can realize the technical solution of the present invention. The scope of protection claimed by the present invention is not limited only to this embodiment, but also includes changes, replacements and other implementation methods that can be easily thought of by any technician familiar with the technical field within the technical scope disclosed by the present invention.

Claims

1. A wheelchair pedal adjustment mechanism, characterized in that: The invention comprises a leg plate mechanism (1), a pedal height adjustment mechanism (2), a pedal angle adjustment mechanism (3), two pedals (4) and a pedal rotation shaft (5), wherein the pedal height adjustment mechanism (2) and the pedal angle adjustment mechanism (3) are both mounted on the leg plate mechanism (1); the two pedals (4) are symmetrically arranged on the output end of the pedal height adjustment mechanism (2), and the pedal height adjustment mechanism (2) is used to drive the pedal (4) to move vertically; the pedal (4) is connected to the output end of the pedal height adjustment mechanism (2) via the pedal rotation shaft (5), one end of the pedal rotation shaft (5) is fixedly connected to the pedal (4), and the other end is rotationally connected to the output end of the rubbing pedal height adjustment mechanism (2); the output end of the pedal angle adjustment mechanism (3) is connected to the input end of the pedal rotation shaft (5), and is used to adjust the angle between the pedal (4) and the horizontal plane; The pedal angle adjustment mechanism (3) comprises an angle drive motor (31), a second angle turner (32), a second screw rod (33), a second screw rod nut (34), an angle adjustment connecting plate (35), a sliding connecting plate (36), an angle adjustment connecting rod (37) and an angle drive connecting rod (38); the angle drive motor (31) and the second angle turner (32) are both vertically slidably arranged on the leg plate mechanism (1), the output end of the angle drive motor (31) is connected to the first input end of the second angle turner (32), the second screw rod (33) is vertically arranged, and the upper end of the second screw rod (33) is connected to the output end of the second angle turner (32). The second screw nut (34) is movably sleeved on the second screw (33), the angle adjustment connecting plate (35) is horizontally fixed on the second screw nut (34), and the two ends of the angle adjustment connecting plate (35) are respectively connected to the leg plate mechanism (1) in a vertical sliding manner through the sliding connecting plate (36); the sliding connecting plate (36) and the stepping pedal (4) are arranged in a vertically corresponding manner, one end of the angle adjustment connecting rod (37) is connected to the sliding connecting plate (36), the other end of the angle adjustment connecting rod (37) is rotatably connected to one end of the angle driving connecting rod (38), and the other end of the angle driving connecting rod (38) is fixedly connected to the input end of the stepping pedal shaft (5); The pedal height adjustment mechanism (2) comprises a height drive motor (21), a first angler (22), a first screw rod (23), a first screw rod nut (24), a height adjustment connecting plate (25) and a bearing fixing plate (26); the height drive motor (21) is fixedly arranged on the leg plate mechanism (1), the output end of the height drive motor (21) is connected to the first input end of the first angler (22), the first screw rod (23) is vertically arranged in the middle of the leg plate mechanism (1), and the upper end of the first screw rod (23) is connected to the first angler (22). The first screw nut (24) is movably sleeved on the first screw (23); the height adjustment connecting plate (25) is arranged horizontally, and the middle part of the height adjustment connecting plate (25) is fixedly connected to the first screw nut (24); two ends of one side of the height adjustment connecting plate (25) are vertically slidably connected to the leg plate mechanism (1), and two ends of the other side of the height adjustment connecting plate (25) are respectively provided with bearing fixing plates (26), and the pedal rotating shaft (5) is horizontally rotatably arranged on the bearing fixing plate (26).

2. A wheelchair pedal adjustment mechanism according to claim 1, characterized in that: The pedal height adjustment mechanism (2) further comprises a first manual knob (29) and a first knob connecting shaft (210); one end of the first knob connecting shaft (210) is fixedly connected to the first manual knob (29), and the other end is connected to the second input end of the first angle meter (22).

3. A wheelchair pedal adjustment mechanism according to claim 1, characterized in that: The first angler (22) comprises a first bevel gear, a second bevel gear, a third bevel gear, a fourth bevel gear and a first angler housing, wherein the first bevel gear, the second bevel gear, the third bevel gear and the fourth bevel gear are all arranged in the first angler housing and are meshed in sequence to form a rectangular connection; the output end of the height drive motor (21) is connected to the first bevel gear, the upper end of the first screw rod (23) is connected to the fourth bevel gear, the first bevel gear meshes with the fourth bevel gear, and the rotation axes of the first bevel gear and the fourth bevel gear are perpendicular.

4. A wheelchair pedal adjustment mechanism according to claim 1, characterized in that: The pedal angle adjustment mechanism (3) further comprises a second manual knob (313) and a second knob connecting shaft (314); one end of the second knob connecting shaft (314) is connected to the second manual knob (313), and the other end is connected to the second input end of the second angle meter (32).

5. The wheelchair pedal adjustment mechanism according to claim 1, characterized in that: The pedal angle adjustment mechanism (3) further comprises a cornering device fixing plate (39) and an angle driving motor fixing plate (311); the cornering device fixing plate (39) is vertically slidably arranged on the leg board mechanism (1); one end of the cornering device fixing plate (39) is vertically slidably connected to the leg board mechanism (1); the other end is fixedly connected to the pedal height adjustment mechanism (2); the second cornering device (32) is fixedly arranged on the cornering device fixing plate (39); the angle driving motor fixing plate (311) is horizontally arranged; one end of the angle driving motor fixing plate (311) is vertically slidably connected to the leg board mechanism (1); the other end is fixedly connected to the cornering device fixing plate (39); the angle driving motor (31) is fixedly arranged on the angle driving motor fixing plate (311).

6. A wheelchair pedal adjustment mechanism according to claim 1, characterized in that: The second angler (32) comprises a fifth bevel gear, a sixth bevel gear, a seventh bevel gear, an eighth bevel gear and a second angler housing, wherein the fifth bevel gear, the sixth bevel gear, the seventh bevel gear and the eighth bevel gear are all arranged in the second angler housing and are meshed in sequence to form a rectangular connection; the output end of the angle drive motor (31) is connected to the fifth bevel gear, the upper end of the second screw rod (33) is connected to the eighth bevel gear, the fifth bevel gear meshes with the eighth bevel gear, and the rotation axes of the fifth bevel gear and the eighth bevel gear are perpendicular.

7. The wheelchair pedal adjustment mechanism according to claim 1, characterized in that: The leg plate mechanism (1) comprises two vertical slide rails (11), two horizontal connecting beams (12), a height adjustment mechanism mounting seat (13) and an angle adjustment mechanism mounting seat (14); the two vertical slide rails (11) are arranged vertically and in parallel; the two horizontal connecting beams (12) are horizontally and fixedly arranged at the upper and lower ends of the two vertical slide rails (11); the height adjustment mechanism mounting seat (13) is vertically arranged in the middle of the two vertical slide rails (11); the pedal height adjustment mechanism (2) is mounted on the height adjustment mechanism mounting seat (13); the two sides of the pedal height adjustment mechanism (2) are vertically slidably connected to the two vertical slide rails (11); the angle adjustment mechanism mounting seat (14) is vertically arranged between the two vertical slide rails (11) and parallelly arranged on one side of the height adjustment mechanism mounting seat (13); the pedal angle adjustment mechanism (3) is slidably mounted on the angle adjustment mechanism mounting seat (14); the two ends of the pedal angle adjustment mechanism (3) are respectively vertically slidably connected to the two vertical slide rails (11).

8. A wheelchair, characterized in that: It comprises a wheelchair body and a wheelchair pedal adjustment mechanism, wherein the wheelchair pedal adjustment mechanism is fixedly mounted at the front end of the wheelchair body; the wheelchair pedal adjustment mechanism adopts the wheelchair pedal adjustment mechanism described in any one of claims 1-7.

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