A gear-shifting walking aid device suitable for a wheelchair, a wheelchair and a method of using the same

Abstract

The present invention proposes a shift-type walking aid device suitable for a wheelchair, a wheelchair and a method of using the same, which relates to the technical field of wheelchairs, including a housing, a ratchet assembly, an energy storage assembly, an energy release assembly, a transmission assembly and a drive assembly. By equipping the ratchet mechanism, the wheelchair can be prevented from slipping when going uphill, and the effect of labor saving and convenience is achieved while taking into account safety. By using the energy storage assembly, the energy release assembly and the transmission assembly, and by adjusting the meshing mode between the gears in a timely manner, the energy storage of the torque spring when going downhill and the energy release on the flat road after the slope can be achieved, which is not only conducive to reducing the speed of the wheelchair when going downhill, but also realizes the secondary recovery and reuse of energy, achieving the effect of labor saving and walking aid; the shift-type design is adopted, and different driving gears can be switched, so that the wheelchair can better adapt to diversified working scenes such as uphill, downhill, and flat roads, and improves the safety of the wheelchair and the convenience of operation.

Description

Technical Field

[0001] The present invention relates to the technical field of wheelchairs, and in particular to a gear-shifting walking aid device suitable for a wheelchair, a wheelchair and a method of using the wheelchair. Background Art

[0002] Traditional wheelchairs are often unable to cope with complex terrains such as slopes. When going uphill, the user needs to expend a lot of physical strength to push the wheelchair, and the wheelchair is prone to slipping backwards. When going downhill, the wheelchair is prone to excessive speed and difficult to control due to inertia, which not only brings great inconvenience to the disabled, but also increases the safety risks of wheelchairs. Therefore, how to transform and upgrade traditional wheelchairs to better adapt to various terrains such as uphill and downhill has become one of the current problems that need to be solved urgently.

[0003] The patent with publication number CN110711085A discloses a knob-type shift lever drive device and a wheelchair suitable for a wheelchair. The patent uses a knob control lever and a ratchet drive mechanism to convert the horizontal thrust of the arm into the rotational force of the ratchet wheel using the lever principle, which is simple to drive, labor-saving and efficient; the direction of the driving force of the knob control lever can be switched by turning the knob on the knob control lever, thereby changing the force direction of the ratchet wheel, making it easier to control the direction of travel of the wheelchair, and the knob can be automatically reset by an elastic reset element. However, the patent is limited to the working conditions of the wheelchair on flat terrain, and does not fully consider the working conditions when going uphill and downhill. The wheelchair is prone to slipping backwards when going uphill, and the speed is too fast to control when going downhill, so the safety of the wheelchair cannot be guaranteed during use. Summary of the invention

[0004] In view of this, the present invention proposes a shift-type walking aid device suitable for a wheelchair, a wheelchair and a method of using the same, which can switch between different driving gears so that the wheelchair can better adapt to diversified working scenarios such as uphill, downhill and flat roads, while taking into account safety and convenience, achieving the effects of saving effort and assisting walking.

[0005] The technical solution of the present invention is achieved in this way:

[0006] In a first aspect, the present invention provides a gear-shifting walking aid device suitable for a wheelchair, comprising:

[0007] Box;

[0008] The ratchet assembly is located in the box and includes a wheel shaft, a rotating gear, an inner ratchet and a ratchet gear ring. The wheel shaft is horizontally rotatably arranged in the box, and its two ends extend out of the box to be fixedly connected to the wheel. The rotating gear and the inner ratchet are fixedly arranged on the wheel shaft, and the ratchet gear ring is sleeved on the rotating shaft and can be translated along the wheel shaft to connect or disconnect from the inner ratchet.

[0009] The energy storage assembly is located on a side of the box body away from the ratchet assembly, and includes a spring chamber, a torsion spring, a rotating shaft and a first gear set. The spring chamber is fixedly arranged in the box body, the torsion spring is accommodated in the spring chamber, one end of the rotating shaft is rotatably connected to the box body, and the other end is fixedly connected to the torsion spring. The first gear set is fixedly arranged on the rotating shaft;

[0010] The energy release assembly is located between the ratchet assembly and the energy storage assembly, and includes a fixed shaft, a second gear set and a first elastic member. The fixed shaft can move horizontally in the box along its axial direction. The second gear set is rotatably arranged on the fixed shaft. The first elastic member is horizontally located between one end of the fixed shaft and the side wall of the box. The end of the fixed shaft connected to the first elastic member is also used for fixed connection with the brake line of the wheelchair.

[0011] A transmission assembly, comprising a first transmission gear and a second transmission gear, wherein the first transmission gear is used to establish a transmission connection between the rotating gear and the second gear set, and the second transmission gear is used to establish a transmission connection between the second gear set and the first gear set;

[0012] The driving assembly includes a blocking rod, a base, a first connecting rod and a second connecting rod. The base is fixedly arranged on the box body. The bottom end of the blocking rod is hinged to the base. The same end of the first connecting rod and the second connecting rod are both rotatably connected to the middle part of the blocking rod. The other end of the first connecting rod is hinged to the ratchet gear ring, and is used to drive the ratchet gear ring to move horizontally along the wheel axle under the action of the blocking rod. The other end of the second connecting rod is hinged to one end of the fixed shaft away from the first elastic member, and is used to drive the fixed shaft and the second gear set to move horizontally under the action of the blocking rod.

[0013] On the basis of the above technical solution, preferably, the first gear set includes a first energy storage gear and a second energy storage gear fixedly arranged on the rotating shaft, and the second energy storage gear is located at one end of the rotating shaft close to the clockwork chamber;

[0014] One end of the second transmission gear is rotatably connected to the inner wall of the box, and the other end is meshingly connected to the first energy storage gear;

[0015] The first transmission gear is meshed and connected with the rotating gear, a third transmission gear is fixedly arranged at one end of the first transmission gear facing the inner ratchet, and a rotating shaft rotatably connected with two inner side walls of the box body is fixedly arranged on the central axis of the first transmission gear and the third transmission gear;

[0016] The second gear set includes a first energy release gear, a second energy release gear and a third energy release gear which are sequentially fixed on the fixed shaft. The first energy release gear is located at one end of the fixed shaft close to the first elastic member. The first energy release gear is used to mesh with the first transfer gear and the second transfer gear. The second energy release gear is used to mesh with the third transfer gear. The third energy release gear is used to mesh with the second energy storage gear.

[0017] Further, preferably, the total length of the second energy release gear and the third energy release gear is smaller than the distance between the second transmission gear and the second energy storage gear, and the horizontal distance between the third transmission gear and the second energy storage gear is larger than the thickness of the second energy release gear.

[0018] On the basis of the above technical solution, preferably, the inner ratchet includes a wheel sleeve and a plurality of pawls evenly arranged on the outer circumference of the wheel sleeve, the outer surface of the wheel sleeve is provided with a mounting groove along its axial direction, one end of the pawl is rotatably connected to one side of the mounting groove in the length direction, a second elastic member is provided between the pawl and the mounting groove for driving the other end of the pawl to open toward the outside of the mounting groove, a slide is also fixedly provided in the box body, the ratchet gear ring is slidably provided on the slide, the inner wall of the ratchet gear ring is evenly provided with a plurality of internal tooth grooves, the contour of the internal tooth grooves is adapted to the outer contour of the ratchet after opening.

[0019] On the basis of the above technical solution, preferably, a plurality of grooves are evenly arranged on the inner peripheral wall of the spring compartment, the winding center end of the torsion spring is fixedly connected to one end of the rotating shaft, and the winding outer end of the torsion spring is connected to the groove.

[0020] On the basis of the above technical solution, preferably, a guide sleeve is horizontally fixedly provided on the inner wall of one side of the box body, the first elastic member is located in the guide sleeve, one end of the fixed shaft is inserted in the guide sleeve, and a through hole for the brake line to pass through is provided on the side wall of the box body corresponding to the guide sleeve, and a support plate is horizontally fixedly provided on the inner wall of the other side of the box body, the other end of the fixed shaft is slidably provided on the support plate, and this end of the fixed shaft extends out of the outside of the box body and is horizontally hinged to an end of the second connecting rod away from the baffle rod.

[0021] On the basis of the above technical solution, preferably, the drive assembly also includes a gear fixing plate, which is used to be fixedly connected to the wheelchair body, and a slide groove is provided on the surface of the gear fixing plate for the gear rod to pass through, and the length direction of the slide groove is the same as the transmission direction of the wheel axle, and the slide groove is sequentially provided with a first stop groove, a second stop groove and a third stop groove along its length direction for connecting with the gear rod, and the third stop groove faces one side of the wheel axle, and the first stop groove, the second stop groove and the third stop groove correspond to downhill, neutral and uphill respectively.

[0022] Further, preferably, a strip-shaped through groove is horizontally opened on the side wall of the box body, and the strip-shaped through groove is used for the first connecting rod to movably pass through, and a handle is fixedly provided on one end of the blocking rod away from the base.

[0023] In the second aspect, the present invention discloses a wheelchair, comprising a wheelchair body and wheels arranged on both sides of the wheelchair body, the wheelchair body is also provided with a brake device connected to the wheels, and also includes a shift-type walking aid device installed on the wheelchair body, the two ends of the wheel axle are respectively fixedly connected to the wheels, and a handbrake is also provided at the push handle of the wheelchair body, and the brake line of the handbrake is fixedly connected to one end of the fixed shaft close to the first elastic member.

[0024] In a third aspect, the present invention discloses a method for using a wheelchair, comprising the following steps:

[0025] S1. When the wheelchair needs to go uphill, the lever is moved to make the first connecting rod drive the ratchet gear ring to move horizontally and connect with the inner ratchet. During the wheel climbing process, the inner ratchet and the ratchet gear ring cooperate with each other to make the wheel axle rotate in a single direction. The wheelchair can only move in one direction to prevent slipping;

[0026] S2. When the wheelchair needs to go downhill, the lever is toggled to make the second connecting rod drive the energy release assembly to move in the direction of the first elastic member, and by pulling the hand brake, the brake line drives the fixed shaft to compress the first elastic member, so that the rotating gear, the first transmission gear, the second gear set, the second transmission gear and the first gear set are meshed and connected in sequence. At this time, the torsion spring is tightened, and the kinetic energy of the rotation of the wheel shaft is converted into the potential energy of the torsion spring for storage. In the process of energy conversion, the speed of the wheelchair is reduced;

[0027] S3. When the wheelchair reaches the bottom of the slope, the handbrake is released, and the energy release component rebounds under the action of the first elastic member. At this time, the rotating gear, the first transmission gear, the second gear set and the first gear set are meshed and connected in sequence. Under the action of the torsion spring, the potential energy is released and converted into the rotational kinetic energy of the shaft, and then the kinetic energy is transmitted to the wheel axle through the transmission between the gears, pushing the wheelchair to continue to travel a distance on the flat road;

[0028] S4. When the wheelchair is moving on a flat road, the lever is moved to disconnect the ratchet gear ring from the inner ratchet, and at the same time, the energy release assembly and the second transmission gear are disconnected, so that the wheelchair can be pushed in different directions.

[0029] Compared with the prior art, the present invention has the following beneficial effects:

[0030] (1) The present invention can prevent the wheelchair from slipping when going uphill by equipping it with a ratchet mechanism, which takes into account safety while achieving the effect of labor-saving and convenience. Through the energy storage component, energy release component and transmission component, and timely adjustment of the meshing mode between the gears, the torque spring can store energy when going downhill and release energy on the flat road after the slope, which is not only conducive to reducing the speed of the wheelchair when going downhill, but also realizes the secondary recovery and reuse of energy, achieving the effect of labor-saving and walking assistance; the gear-shifting design is adopted, and different driving gears can be switched, so that the wheelchair can better adapt to diversified working scenes such as uphill, downhill, and flat roads, improving the safety of the wheelchair and the convenience of operation.

[0031] (2) When going downhill, the shift-type walking aid device pushes the lever and tightens the handbrake to transfer the rotational kinetic energy of the wheel axle to the first energy storage gear and tighten the torque spring to store energy, thereby slowing down the wheelchair to ensure safety. After the downhill is completed, the handbrake is released, and under the action of the first elastic member, the fixed shaft and the second gear set are reset, so that the second energy release gear meshes with the third transmission gear, the torque spring releases energy, and the wheel axle is driven to continue moving forward through the gear transmission system, thereby achieving a labor-saving walking aid effect on a flat road, taking into account both efficient energy utilization and driving stability.

[0032] (3) By setting the gear fixing plate and the slide groove, the gear lever can be switched between different gears, thereby achieving different driving effects of the wheelchair in downhill, neutral and uphill states. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0034] Figure 1 It is a schematic diagram of the three-dimensional structure of the gear-shifting walking aid device disclosed in the present invention;

[0035] Figure 2 It is a three-dimensional structural schematic diagram of the driving assembly disclosed in the present invention;

[0036] Figure 3 It is a schematic diagram of the internal structure of the gear-shifting walking aid device disclosed in the present invention;

[0037] Figure 4 It is a three-dimensional structural schematic diagram of the energy storage assembly disclosed in the present invention;

[0038] Figure 5 It is a three-dimensional structural schematic diagram of the ratchet assembly disclosed in the present invention;

[0039] Figure 6 It is a schematic structural diagram of the inner ratchet disclosed in the present invention;

[0040] Figure 7 It is a structural schematic diagram of the ratchet gear ring disclosed in the present invention;

[0041] Figure 8 It is a schematic diagram of the working state of the inner ratchet and the ratchet gear ring disclosed in the present invention;

[0042] Fig. 9 It is a schematic diagram of the three-dimensional structure of the energy release component disclosed in the present invention;

[0043] Fig.10 It is a schematic diagram of the internal structure of the gear-shifting walking aid device disclosed in the present invention in a neutral state;

[0044] Fig.11 It is a schematic diagram of the internal structure of the gear-shifting walking-assisting device disclosed in the present invention in an uphill state;

[0045] Fig.12 It is a schematic diagram of the internal structure of the gear-shifting walking-assisting device disclosed in the present invention in a downhill energy storage state;

[0046] Fig.13 It is a schematic diagram of the internal structure of the gear-shifting walking-assisting device disclosed in the present invention in the energy-release state;

[0047] Fig.14 It is a schematic diagram of the three-dimensional structure of the wheelchair disclosed in the present invention from a first-person perspective;

[0048] Fig.15 It is a schematic diagram of the second-view stereoscopic structure of the wheelchair disclosed in the present invention;

[0049] Reference numerals:

[0050] 1. Box body; 2. Ratchet assembly; 21. Wheel axle; 22. Rotating gear; 23. Inner ratchet; 231. Wheel sleeve; 232. Ratchet pawl; 233. Second elastic member; 2310. Mounting groove; 24. Ratchet gear ring; 25. Slide; 241. Inner tooth groove; 3. Energy storage assembly; 31. Spring compartment; 311. Groove; 32. Torque spring; 33. Rotating shaft; 34. First gear set; 341. First energy storage gear; 342. Second energy storage gear; 4. Energy release assembly; 41. Fixed shaft; 42. Second gear set; 43. First elastic member; 421. First energy release gear; 422. Second energy release gear ; 423, the third energy-releasing gear; 11, the guide sleeve; 12, the support plate; 13, the through hole; 5, the transmission component; 51, the first transmission gear; 52, the second transmission gear; 53, the third transmission gear; 54, the rotating shaft; 6, the driving component; 61, the gear lever; 62, the base; 63, the first connecting rod; 64, the second connecting rod; 65, the gear fixing plate; 651, the slide groove; 652, the first stop groove; 653, the second stop groove; 654, the third stop groove; 14, the strip through groove; 611, the handle; 7, the wheelchair body; 71, the brake device; 72, the wheel; 73, the handbrake; 731, the brake line. DETAILED DESCRIPTION

[0051] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0052] like Figure 1 As shown, combined Figure 2-5 The embodiment of the present invention discloses a shift-type walking aid device suitable for a wheelchair, including a box body 1, a ratchet assembly 2, an energy storage assembly 3, an energy release assembly 4, a transmission assembly 5 and a drive assembly 6.

[0053] The box 1 is used to contain and protect the internal components and is the supporting structure of the whole device. It is fixedly mounted on the wheelchair body 7 when in use.

[0054] The ratchet assembly 2 is used to prevent the wheelchair from sliding downhill when going uphill. Specifically, the ratchet assembly 2 is located in the box body 1, and includes a wheel axle 21, a rotating gear 22, an inner ratchet 23 and a ratchet gear ring 24. The wheel axle 21 is horizontally rotatably arranged in the box body 1, and its two ends extend out of the box body 1 for fixed connection with the wheel 72. The rotating gear 22 and the inner ratchet 23 are fixedly arranged on the wheel axle 21, and the ratchet gear ring 24 is sleeved on the rotating shaft 33, and can be translated along the wheel axle 21 to connect or disconnect from the inner ratchet 23.

[0055] The rotational kinetic energy of the wheel 72 during the forward movement is transmitted to the rotating gear 22 through the axle 21. The rotating gear 22 is used to perform transmission connection with other components to establish a linkage relationship under different states. The axle 21 will drive the inner ratchet 23 to rotate during the rotation process. When it is uphill, the ratchet gear ring 24 can be moved along the axial direction of the axle 21, so that the ratchet gear ring 24 is sleeved on the outer side of the inner ratchet 23, so that the ratchet gear ring 24 and the inner ratchet 23 are matched and connected. At this time, the inner ratchet 23 can only rotate in one direction in the forward direction of the wheelchair, preventing the axle 21 from rotating in the opposite direction, and preventing the wheelchair from sliding backward. In this embodiment, the translation operation of the ratchet gear ring 24 is realized by the drive group.

[0056] The energy storage assembly 3 is used to store energy when going downhill. The energy storage assembly 3 is located on a side of the housing 1 away from the ratchet assembly 2, and includes a spring chamber 31, a torsion spring 32, a rotating shaft 33 and a first gear set 34. The spring chamber 31 is fixedly arranged in the housing 1, and the torsion spring 32 is accommodated in the spring chamber 31. One end of the rotating shaft 33 is rotatably connected to the housing 1, and the other end is fixedly connected to the torsion spring 32. The first gear set 34 is fixedly arranged on the rotating shaft 33.

[0057] In this embodiment, the rotational kinetic energy of the wheel shaft 21 can be transmitted to the first gear set 34 through the transmission component 5 and the energy release component 4 in sequence, so that the rotation direction of the shaft 33 is the same as that of the wheel shaft 21. During the rotation of the shaft 33, the torque spring 32 is tightened in the spring compartment 31 to complete energy storage. During the downhill process, the rotational kinetic energy can be consumed due to the tightening and energy storage of the torque spring 32, thereby reducing the speed of the wheelchair when going downhill to a certain extent. At the same time, after the energy storage component 3 completes the energy storage, it is convenient to release energy during the flat road process, which saves effort and helps the wheelchair to walk. In this embodiment, the first gear set 34 is used to transmit power with the gear sets in other components.

[0058] The energy release component 4 is used to establish the energy storage and energy release operations of the energy storage component 3. Specifically, in the present embodiment, the energy release component 4 is located between the ratchet component 2 and the energy storage component 3, and includes a fixed shaft 41, a second gear set 42 and a first elastic member 43. The fixed shaft 41 can move horizontally in the housing 1 along its axial direction, the second gear set 42 is rotatably arranged on the fixed shaft 41, the first elastic member 43 is horizontally located between one end of the fixed shaft 41 and the side wall of the housing 1, and the end of the fixed shaft 41 connected to the first elastic member 43 is also used to be fixedly connected to the brake line 731 of the wheelchair.

[0059] In this embodiment, the horizontal movement of the fixed shaft 41 is achieved on the one hand by the driving component 6. Specifically, the driving component 6 can drive the fixed shaft 41 to move a certain displacement in the direction of the first elastic member 43. On the other hand, by pulling the handbrake 73 on the wheelchair, the brake line 731 on the handbrake 73 drives the fixed shaft 41 to move further. By moving the fixed shaft 41 to different positions, the second gear set 42 can selectively establish a transmission relationship with the rotating gear 22 and the first gear set 34 through the transmission component 5, thereby switching between the energy storage and energy release states.

[0060] The transmission assembly 5 is used to establish a transmission relationship between the rotating gear 22, the first gear set 34 and the second gear set 42. Specifically, the transmission assembly 5 includes a first transmission gear 51 and a second transmission gear 52. The first transmission gear 51 is used to establish a transmission connection between the rotating gear 22 and the second gear set 42, and the second transmission gear 52 is used to establish a transmission connection between the second gear set 42 and the first gear set 34.

[0061] In the above embodiment, when in the process of going downhill, the driving assembly 6 drives the fixed shaft 41 and the second gear set 42 to move between the first transfer gear 51 and the second transfer gear 52. At the same time, by tightening the handbrake 73, the brake line 731 further drives the fixed shaft 41 and the second gear set 42 to translate toward the first elastic member 43. The fixed shaft 41 compresses the first elastic member 43, so that the second gear set 42 is meshed with the first transfer gear 51 and the second transfer gear 52 respectively. At this time, the rotational kinetic energy of the wheel shaft 21 is sequentially By rotating the gear 22, the first transfer gear 51, the second gear set 42, and the second transfer gear 52 to the first gear set 34, the rotation direction of the first gear set 34 is the same as the rotation direction of the axle 21. At this time, the torsion spring 32 is wound and stored. During the downhill process, the wheelchair can be decelerated to a certain extent due to the tightening of the torsion spring 32. Of course, in some embodiments, for safety reasons, the passengers can also pull the brake device 71 by themselves to cause the brake device 71 to frictionally decelerate the wheel 72.

[0062] When the power storage is completed, at the bottom of the slope, by releasing the handbrake 73, the first elastic member 43 can drive the fixed shaft 41 and the second gear set 42 to move in the opposite direction under the elastic action, so that the second gear set 42 is disconnected from the second transfer gear 52. At this time, the first gear set 34, the second gear set 42, the first transfer gear 51 and the rotating gear 22 establish a transmission relationship. Since the torque spring 32 releases energy at this time, the first gear set 34 rotates in the opposite direction. After being transmitted by the second gear set 42, the first transfer gear 51 and the rotating gear 22, the rotation direction of the axle 21 is opposite to that of the first gear set 34, so that the axle 21 always rotates in the forward direction, so that the wheelchair can easily assist walking for a distance on a flat road until the power stored in the spring is completely released, which has the effect of saving effort and assisting walking.

[0063] The driving assembly 6 is used for changing the gear position. Specifically, the driving assembly 6 includes a gear lever 61, a base 62, a first connecting rod 63 and a second connecting rod 64. The base 62 is fixedly arranged on the housing 1. The bottom end of the gear lever 61 is hingedly connected to the base 62. The same ends of the first connecting rod 63 and the second connecting rod 64 are both rotatably connected to the middle of the gear lever 61. The other end of the first connecting rod 63 is hingedly connected to the ratchet gear ring 24, which is used to drive the ratchet gear ring 24 to move horizontally along the wheel axle 21 under the action of the gear lever 61. The other end of the second connecting rod 64 is hingedly connected to an end of the fixed shaft 41 away from the first elastic member 43, which is used to drive the fixed shaft 41 and the second gear set 42 to move horizontally under the action of the gear lever 61. In this embodiment, under different terrain conditions, by adjusting the gear lever 61, the corresponding connecting rod is moved, so that the easy switching between downhill, uphill and neutral gear can be realized, thereby realizing the flexible response of the wheelchair under different terrain conditions.

[0064] The present invention can prevent the wheelchair from slipping when going uphill by equipping it with a ratchet mechanism, achieving the effect of labor-saving and convenience while taking into account safety. Through the energy storage component 3, the energy release component 4 and the transmission component 5, and timely adjusting the meshing mode between the gears, the energy storage of the torque spring 32 when going downhill and the energy release on the flat road after the slope can be realized, which is not only conducive to reducing the speed of the wheelchair when going downhill, but also realizes the secondary recovery and reuse of energy, achieving the effect of labor-saving and walking assistance; the gear-shifting design is adopted, and different driving gears can be switched, so that the wheelchair can better adapt to diversified working scenes such as uphill, downhill, and flat roads, improving the safety of the wheelchair and the convenience of operation.

[0065] In order to facilitate the energy storage and release of the energy storage component 3 through gear transmission, refer to the attached Figure 1 and 3 As shown, this embodiment further adopts the following technical solutions to achieve the above.

[0066] Specifically, the first gear set 34 includes a first energy storage gear 341 and a second energy storage gear 342 fixedly disposed on the rotating shaft 33, and the second energy storage gear 342 is located at one end of the rotating shaft 33 close to the spring compartment 31. One end of the second transmission gear 52 is rotatably connected to the inner wall of the box body 1, and the other end is meshedly connected to the first energy storage gear 341;

[0067] The first transmission gear 51 is meshed and connected with the rotating gear 22. A third transmission gear 53 is fixedly arranged at one end of the first transmission gear 51 facing the inner ratchet 23. A rotating shaft 54 ​​rotatably connected to the two inner side walls of the box body 1 is fixedly arranged on the central axis of the first transmission gear 51 and the third transmission gear 53.

[0068] The second gear set 42 includes a first energy releasing gear 421, a second energy releasing gear 422 and a third energy releasing gear 423 which are sequentially fixed on the fixed shaft 41. The first energy releasing gear 421 is located at one end of the fixed shaft 41 close to the first elastic member 43. The first energy releasing gear 421 is used for meshing and connecting with the first transfer gear 51 and the second transfer gear 52. The second energy releasing gear 422 is used for meshing and connecting with the third transfer gear 53. The third energy releasing gear 423 is used for meshing and connecting with the second energy storage gear 342.

[0069] Adopt the above technical solution, refer to the attached Figure 10-13 As shown, when the wheelchair is on a downhill slope, by pushing the barrier rod 61, under the action of the barrier rod 61, the second connecting rod 64 drives the fixed shaft 41 and the second gear set 42 to translate as a whole toward the first elastic member 43. At the same time, the handbrake 73 is tightened, and the brake line 731 further moves the fixed shaft 41 and the second gear set 42 as a whole toward the first elastic member 43 and compresses the first elastic member 43. At this time, the first energy release gear 421 and the first transfer gear 51 and the second transfer gear 52 are respectively meshed and connected, and the rotational kinetic energy of the wheel shaft 21 is transmitted to the first energy storage gear 341 through the rotating gear 22, the first transfer gear 51, the first energy release gear 421, and the second transfer gear 52, so that the wheel shaft 21 and the first energy storage gear 341 have the same rotation direction, and the rotating shaft 33 tightens and stores energy for the torsion spring 32 during the rotation process. During the energy storage process, the rotational kinetic energy of the axle 21 can be consumed and weakened, thereby reducing the speed of the wheelchair to a certain extent and ensuring safety when going downhill. At the same time, the rotational potential energy of the axle 21 during the downhill process can be stored in the torsion spring 32 for energy storage.

[0070] After the downhill is completed, by releasing the handbrake 73, under the action of the first elastic member 43, the fixed shaft 41 and the second gear set 42 as a whole translate in the direction away from the first elastic member 43. At this time, due to the action of the second connecting rod 64, the fixed shaft 41 and the second gear set 42 can only move a certain distance, which is the displacement under the initial driving action of the second connecting rod 64. At this time, the second gear set 42 is in a state that just makes the second energy release gear 422 and the third transfer gear 53 meshed and connected, and at the same time, the third energy release gear 423 is meshed and connected with the second energy storage gear 342. Since the torque spring 32 releases energy at this time, the first gear set 34 rotates in the opposite direction. After being transmitted through the second energy storage gear 342, the third energy release gear 423, the second energy release gear 422, the first transmission gear 51 and the rotating gear 22, the rotation direction of the axle 21 is opposite to that of the first gear set 34, so that the axle 21 always rotates in the forward direction, thereby allowing the wheelchair to easily move for a distance on a flat road until the energy stored in the spring is completely released, which has the effect of saving effort and assisting walking.

[0071] As some preferred embodiments, the total length of the second energy-releasing gear 422 and the third energy-releasing gear 423 is less than the distance between the second transfer gear 52 and the second energy-storing gear 342. This design ensures that the second energy-releasing gear 422 and the third energy-releasing gear 423 will not simultaneously engage with the second transfer gear 52 and the second energy-storing gear 342 when they are engaged. This helps prevent interference between gears and ensures smooth operation of the transmission system. The horizontal distance between the third transfer gear 53 and the second energy-storing gear 342 is greater than the thickness of the second energy-releasing gear 422. This can prevent the second energy-releasing gear 422 from engaging with the third transfer gear 53 when in neutral.

[0072] As some preferred implementations, refer to the attached Figure 6-8 As shown, the inner ratchet 23 includes a wheel sleeve 231 and a plurality of pawls 232 evenly arranged on the outer circumference of the wheel sleeve 231. The outer surface of the wheel sleeve 231 is provided with a mounting groove 2310 along its axial direction. One end of the pawl 232 is rotatably connected to one side of the mounting groove 2310 in the length direction. A second elastic member 233 is provided between the pawl 232 and the mounting groove 2310 for driving the other end of the pawl 232 to open toward the outside of the mounting groove 2310. The mounting groove 2310 is provided for accommodating and fixing one end of the pawl 232 so that it can rotate around the mounting groove 2310 and when under pressure, the other end of the pawl 232 can also be accommodated in the mounting groove 2310. A slide 25 is also fixedly arranged in the box body 1, and the ratchet gear ring 24 is slidably arranged on the slide 25. The inner wall of the ratchet gear ring 24 is evenly provided with a plurality of inner tooth grooves 241. The contour of the inner tooth grooves 241 is adapted to the outer contour of the ratchet pawl 232 after opening, thereby ensuring that the ratchet pawl 232 can cooperate with the inner tooth grooves 241, thereby realizing energy transmission or braking function.

[0073] In this embodiment, the ratchet gear ring 24 can be slidably mounted on the outside of the inner ratchet 23 during horizontal movement. At the same time, in the absence of external force, the pawl 232 can be accommodated in the inner tooth groove 241. During the rotation of the inner ratchet 23, the pawl 232 will successively cross the inner tooth groove 241. Due to the obstruction of the inner tooth groove 241, if the inner ratchet 23 is to rotate in a certain direction, the pawl 232 can be stopped, thereby realizing the unidirectional rotation of the wheel axle 21 and preventing the wheelchair from slipping during the uphill process.

[0074] As some preferred implementations, refer to the attached Figure 4 As shown, the inner wall of the spring compartment 31 is evenly provided with a plurality of grooves 311, the winding center end of the torsion spring 32 is fixedly connected to one end of the rotating shaft 33, and the winding outer end of the torsion spring 32 is connected to the groove 311. With such a technical solution, since the total length of the torsion spring 32 is fixed and the tightening degree is fixed, when the downhill stroke is large, after the torsion spring 32 exceeds its collection degree, the entire torsion spring 32 will rotate in the spring compartment 31, and the winding outer end of the torsion spring 32 will sequentially pass through each groove 311, so as to avoid the torsion spring 32 from being tightened excessively and causing its failure. When energy release is required, the winding outer end of the torsion spring 32 will be held against by one of the grooves 311, thereby realizing the energy release of the torsion spring 32.

[0075] In order to realize the horizontal movement of the fixed shaft 41, refer to the attached Fig. 9 As shown, in this embodiment, a guide sleeve 11 is fixedly arranged horizontally on the inner wall of one side of the box body 1, the first elastic member 43 is located in the guide sleeve 11, and one end of the fixed shaft 41 is inserted in the guide sleeve 11. Thus, the fixed shaft 41 can move horizontally in the guide sleeve 11. The side wall of the box body 1 corresponding to the guide sleeve 11 is provided with a through hole 13 for the brake line 731 to pass through. When the handbrake 73 is pulled up, the brake line 731 can pull the fixed shaft 41, so that the fixed shaft 41 compresses the first elastic member 43 in the guide sleeve 11. A support plate 12 is fixedly arranged horizontally on the inner wall of the other side of the box body 1, and the other end of the fixed shaft 41 is slidably arranged on the support plate 12, and the end of the fixed shaft 41 extends out of the outer side of the box body 1 and is horizontally hinged to the end of the second connecting rod 64 away from the blocking rod 61. The surface contour of the support plate 12 is adapted to the outer surface contour of the fixed shaft 41, thereby providing support and movement guiding functions for the fixed shaft 41.

[0076] In order to realize the switching of gears, the driving assembly 6 of this embodiment also includes a gear fixing plate 65, which is used to be fixedly connected to the wheelchair body 7. A slide groove 651 is provided on the surface of the gear fixing plate 65 for the gear rod 61 to move through. The length direction of the slide groove 651 is the same as the transmission direction of the wheel axle 21. The slide groove 651 is sequentially provided with a first stop groove 652, a second stop groove 653 and a third stop groove 654 for connecting with the gear rod 61 along its length direction. The third stop groove 654 faces one side of the wheel axle 21. The first stop groove 652, the second stop groove 653 and the third stop groove 654 correspond to downhill, neutral and uphill respectively.

[0077] By setting the slide groove 651, the blocking rod 61 can be pushed to move in the length direction of the slide groove 651. During the movement of the blocking rod 61, the first connecting rod 63 and the second connecting rod 64 will be driven to move synchronously. Specifically, when the blocking rod 61 moves from the slide groove 651 to the first stop groove 652, the wheelchair is in a downhill state. Fig.12 As shown, the second connecting rod 64 will drive the energy release assembly 4 to move. At the same time, the first connecting rod 63 will pull the ratchet gear ring 24, so that the ratchet gear ring 24 is at the end of the wheel shaft 21 away from the inner ratchet 23. At this time, the ratchet gear ring 24 will not be connected to the inner ratchet 23. By pulling the handbrake 73, the first energy release gear 421 is meshed with the first transfer gear 51 and the second transfer gear 52 to achieve the power storage of the torsion spring 32. When reaching the bottom of the slope, by releasing the handbrake 73, the fixed shaft 41 and the second gear set 42 are translated in the opposite direction. Fig.13 As shown, at this time, the second energy release gear 422 is meshed with the third transmission gear 53, and the third energy release gear 423 is meshed with the second energy storage gear 342, so that the torsion spring 32 drives the wheel shaft 21 to move forward a certain distance on the flat road when releasing energy.

[0078] When the blocking rod 61 moves from the sliding groove 651 to the second stop groove 653, it is in the neutral position. Fig.10 As shown, only the third energy release gear 423 is meshed with the second energy storage gear 342, and the second energy release gear 422 is not meshed with the third transfer gear 53. Accordingly, the first energy release gear 421 is not meshed with the first transfer gear 51 and the second transfer gear 52. During the rotation of the axle 21, only the first transfer gear 51 is driven to rotate by the rotating gear 22, and the wheelchair can move freely, which is consistent with the use of a conventional wheelchair.

[0079] When the blocking rod 61 moves from the sliding groove 651 to the third stop groove 654, the wheelchair is in an uphill state. Fig.11As shown, the first connecting rod 63 pushes the ratchet gear ring 24 to translate, so that the ratchet gear ring 24 and the inner ratchet 23 are connected. At the same time, the first connecting rod 63 is restrained, which will drive the entire fixed shaft 41 and the second gear set 42 to translate into place in the direction away from the first elastic member 43, and make the third energy release gear 423 and the second energy storage gear 342 mesh and connect.

[0080] A strip-shaped through groove 14 is horizontally opened on the side wall of the box body 1, and the strip-shaped through groove 14 is used for the first connecting rod 63 to move through. In this way, the strip-shaped through groove 14 can provide movement space for the first connecting rod 63 during the swinging process. A handle 611 is fixedly provided at one end of the blocking rod 61 away from the base 62 for the operator to hold conveniently.

[0081] The present invention also discloses a wheelchair. Fig.14 and 15 As shown, the wheelchair comprises a wheelchair body 7 and wheels 72 arranged on both sides of the wheelchair body 7. The wheelchair body 7 is also provided with a brake device 71 connected to the wheel 72. The brake device 71 is used to decelerate by friction with the wheel. The wheelchair comprises a shift-type walking aid installed on the wheelchair body 7. Both ends of the wheel axle 21 are respectively fixedly connected to the wheel 72. A handbrake 73 is also provided at the handle of the wheelchair body 7. The brake line 731 of the handbrake 73 is fixedly connected to one end of the fixed shaft 41 close to the first elastic member 43.

[0082] Through the shift-type walking aid device, the user can switch different gears under different driving conditions (such as flat ground, uphill, downhill), thereby adjusting the power output of the wheelchair to make it more suitable for the current terrain and usage needs. By equipping the ratchet mechanism, the wheelchair can be prevented from slipping when going uphill, taking into account safety while achieving the effect of labor-saving and convenience. Through the energy storage component 3, the energy release component 4 and the transmission component 5, and timely adjusting the meshing mode between the gears, the energy storage of the torque spring 32 when going downhill and the energy release on the flat road after the slope can be achieved, which is not only conducive to reducing the speed of the wheelchair when going downhill, but also realizes the secondary recovery and reuse of energy, achieving the effect of labor-saving and walking aid.

[0083] The invention discloses a method for using a wheelchair, comprising the following steps:

[0084] S1. When the wheelchair needs to go uphill, the stop lever 61 is moved to make the first connecting rod 63 drive the ratchet gear ring 24 to move horizontally and connect with the inner ratchet 23. When the wheel 72 is climbing, the inner ratchet 23 and the ratchet gear ring 24 cooperate with each other to make the wheel axle 21 rotate in a single direction. The wheelchair can only move in one direction to prevent slipping;

[0085] S2. When the wheelchair needs to go downhill, the lever 61 is toggled to make the second connecting rod 64 drive the energy release assembly 4 to translate toward the first elastic member 43, and by pulling the handbrake 73, the brake line 731 drives the fixed shaft 41 to compress the first elastic member 43, so that the rotating gear 22, the first transmission gear 51, the second gear set 42, the second transmission gear 52 and the first gear set 34 are meshed and connected in sequence. At this time, the torsion spring 32 is tightened, and the kinetic energy of the rotation of the wheel shaft 21 is converted into the potential energy of the torsion spring 32 for storage. In the process of energy conversion, the speed of the wheelchair is reduced;

[0086] S3. When the wheelchair reaches the bottom of the slope, the handbrake 73 is released, and the energy release assembly 4 rebounds under the action of the first elastic member 43. At this time, the rotating gear 22, the first transmission gear 51, the second gear set 42 and the first gear set 34 are meshed and connected in sequence. Under the action of the torsion spring 32, the potential energy is released and converted into the rotational kinetic energy of the shaft 33, and then the kinetic energy is transmitted to the wheel shaft 21 through the transmission between the gears, pushing the wheelchair to continue to travel a distance on the flat road;

[0087] S4. When the wheelchair moves on a flat road, the lever 61 is moved to disconnect the ratchet gear ring 24 from the inner ratchet 23, and at the same time disconnect the energy release assembly 4 from the second transmission gear 52, so that the wheelchair can be pushed in different directions.

[0088] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A gear-shifting walking aid suitable for a wheelchair, characterized in that: include: Box body (1); The ratchet assembly (2) is located in the housing (1), and comprises a wheel shaft (21), a rotating gear (22), an inner ratchet (23) and a ratchet gear ring (24). The wheel shaft (21) is horizontally rotatably arranged in the housing (1), and its two ends extend out of the housing (1) for fixed connection with the wheel (72). The rotating gear (22) and the inner ratchet (23) are fixedly arranged on the wheel shaft (21). The ratchet gear ring (24) is sleeved on a rotating shaft (33) and can be translated along the wheel shaft (21) to connect with or disconnect from the inner ratchet (23). An energy storage assembly (3) is located on a side of the box body (1) away from the ratchet assembly (2), and comprises a spring chamber (31), a torsion spring (32), a rotating shaft (33) and a first gear set (34); the spring chamber (31) is fixedly arranged in the box body (1); the torsion spring (32) is accommodated in the spring chamber (31); one end of the rotating shaft (33) is rotatably connected to the box body (1) and the other end is fixedly connected to the torsion spring (32); and the first gear set (34) is fixedly arranged on the rotating shaft (33); An energy release assembly (4) is located between the ratchet assembly (2) and the energy storage assembly (3), and comprises a fixed shaft (41), a second gear set (42) and a first elastic member (43); the fixed shaft (41) can move horizontally in the housing (1) along its axial direction; the second gear set (42) is rotatably arranged on the fixed shaft (41); the first elastic member (43) is horizontally located between one end of the fixed shaft (41) and a side wall of the housing (1); and one end of the fixed shaft (41) connected to the first elastic member (43) is also used for fixedly connecting to a brake line (731) of the wheelchair; A transmission assembly (5), comprising a first transmission gear (51) and a second transmission gear (52), wherein the first transmission gear (51) is used to establish a transmission connection between the rotating gear (22) and the second gear set (42), and the second transmission gear (52) is used to establish a transmission connection between the second gear set (42) and the first gear set (34); A driving assembly (6), comprising a blocking rod (61), a base (62), a first connecting rod (63) and a second connecting rod (64), wherein the base (62) is fixedly arranged on the housing (1), the bottom end of the blocking rod (61) is hingedly connected to the base (62), the same end of the first connecting rod (63) and the second connecting rod (64) are both rotatably connected to the middle part of the blocking rod (61), the other end of the first connecting rod (63) is hingedly connected to the ratchet gear ring (24), and is used to drive the ratchet gear ring (24) to move horizontally along the wheel shaft (21) under the action of the blocking rod (61), and the other end of the second connecting rod (64) is hingedly connected to an end of the fixed shaft (41) away from the first elastic member (43), and is used to drive the fixed shaft (41) and the second gear set (42) to move horizontally under the action of the blocking rod (61); The first gear set (34) comprises a first energy storage gear (341) and a second energy storage gear (342) fixedly arranged on the rotating shaft (33); the second energy storage gear (342) is located at one end of the rotating shaft (33) close to the clockwork chamber (31); One end of the second transmission gear (52) is rotatably connected to the inner wall of the box body (1), and the other end is meshingly connected to the first energy storage gear (341); The first transmission gear (51) is meshedly connected with the rotating gear (22); a third transmission gear (53) is fixedly arranged at one end of the first transmission gear (51) facing the inner ratchet (23); a rotating shaft (54) rotatably connected to two inner side walls of the box body (1) is fixedly arranged on the central axis of the first transmission gear (51) and the third transmission gear (53); The second gear set (42) comprises a first energy-releasing gear (421), a second energy-releasing gear (422) and a third energy-releasing gear (423) which are fixedly arranged on the fixed shaft (41) in sequence, the first energy-releasing gear (421) being located at one end of the fixed shaft (41) close to the first elastic member (43), the first energy-releasing gear (421) being used for meshing connection with the first transmission gear (51) and the second transmission gear (52), the second energy-releasing gear (422) being used for meshing connection with the third transmission gear (53), and the third energy-releasing gear (423) being used for meshing connection with the second energy-storing gear (342); The inner ratchet (23) comprises a wheel sleeve (231) and a plurality of ratchet pawls (232) uniformly arranged on the outer peripheral surface of the wheel sleeve (231); the outer surface of the wheel sleeve (231) is provided with a mounting groove (2310) along its axial direction; one end of the ratchet pawl (232) is rotatably connected to one side of the mounting groove (2310) in the length direction; a second elastic member (233) is provided between the ratchet pawl (232) and the mounting groove (2310) for driving the other end of the ratchet pawl (232) to open toward the outside of the mounting groove (2310); a slide table (25) is also fixedly provided in the housing (1); the ratchet gear ring (24) is slidably provided on the slide table (25); the inner wall of the ratchet gear ring (24) is uniformly provided with a plurality of inner tooth grooves (241); the contour of the inner tooth grooves (241) is adapted to the outer contour of the ratchet pawl (232) after opening; A guide sleeve (11) is fixedly disposed horizontally on the inner wall of one side of the box body (1), the first elastic member (43) is located in the guide sleeve (11), one end of the fixed shaft (41) is inserted into the guide sleeve (11), and a through hole (13) for the brake line (731) to pass through is provided on the side wall of the box body (1) corresponding to the guide sleeve (11), and a support plate (12) is fixedly disposed horizontally on the inner wall of the other side of the box body (1), the other end of the fixed shaft (41) is slidably disposed on the support plate (12), and this end of the fixed shaft (41) extends out of the outside of the box body (1) and is horizontally hinged to one end of the second connecting rod (64) away from the blocking rod (61).

2. The gear-shifting walking aid device suitable for a wheelchair as claimed in claim 1, characterized in that: The total length of the second energy release gear (422) and the third energy release gear (423) is smaller than the distance between the second transmission gear (52) and the second energy storage gear (342), and the horizontal distance between the third transmission gear (53) and the second energy storage gear (342) is larger than the thickness of the second energy release gear (422).

3. The gear-shifting walking aid device suitable for a wheelchair as claimed in claim 1, characterized in that: The inner peripheral wall of the spring compartment (31) is evenly provided with a plurality of grooves (311); the winding center end of the torsion spring (32) is fixedly connected to one end of the rotating shaft (33); and the winding outer end of the torsion spring (32) is connected to the groove (311).

4. The gear-shifting walking aid device suitable for a wheelchair as claimed in claim 1, characterized in that: The driving assembly (6) further comprises a gear fixing plate (65), wherein the gear fixing plate (65) is used for being fixedly connected to the wheelchair body (7), and a slide groove (651) is provided on the surface of the gear fixing plate (65) for the gear lever (61) to movably pass through, and the length direction of the slide groove (651) is the same as the transmission direction of the wheel axle (21), and the slide groove (651) is sequentially provided with a first stop groove (652), a second stop groove (653) and a third stop groove (654) for connecting with the gear lever (61) along its length direction, and the third stop groove (654) faces one side of the wheel axle (21), and the first stop groove (652), the second stop groove (653) and the third stop groove (654) correspond to downhill, neutral and uphill respectively.

5. The gear-shifting walking aid device suitable for a wheelchair as claimed in claim 4, characterized in that: The side wall of the box body (1) is horizontally provided with a strip-shaped through slot (14), and the strip-shaped through slot (14) is used for allowing the first connecting rod (63) to movably pass through. A handle (611) is fixedly provided at one end of the blocking rod (61) away from the base (62).

6. A wheelchair, comprising a wheelchair body (7) and wheels (72) arranged on both sides of the wheelchair body (7), the wheelchair body (7) is further provided with a brake device (71) connected to the wheels (72), characterized in that: It also includes a shift-type walking aid device suitable for a wheelchair as described in any one of claims 1 to 5, which is installed on a wheelchair body (7), the two ends of the wheel axle (21) are respectively fixedly connected to the wheels (72), and a handbrake (73) is also provided at the handle of the wheelchair body (7), and a brake line (731) of the handbrake (73) is fixedly connected to one end of the fixed shaft (41) close to the first elastic member (43).

7. A method for using the wheelchair according to claim 6, characterized in that: The steps include: S1. When the wheelchair needs to go uphill, the stop lever (61) is moved, so that the first connecting rod (63) drives the ratchet gear ring (24) to move horizontally and connect with the inner ratchet (23). When the wheel (72) climbs the slope, the inner ratchet (23) and the ratchet gear ring (24) cooperate with each other to make the wheel shaft (21) rotate in a single direction. The wheelchair can only move in one direction to prevent it from sliding down the slope. S2. When the wheelchair needs to go downhill, the shift lever (61) is moved, so that the second connecting rod (64) drives the energy release assembly (4) to move in the direction of the first elastic member (43), and by pulling the hand brake (73), the brake line (731) drives the fixed shaft (41) to compress the first elastic member (43), so that the rotating gear (22), the first transmission gear (51), the second gear set (42), the second transmission gear (52) and the first gear set (34) are meshed and connected in sequence. At this time, the torsion spring (32) is tightened, and the kinetic energy of the rotation of the wheel shaft (21) is converted into the potential energy of the torsion spring (32) for storage. In the process of energy conversion, the speed of the wheelchair is reduced; S3. When the wheelchair reaches the bottom of the slope, the handbrake (73) is released, and the energy release component (4) rebounds under the action of the first elastic member (43). At this time, the rotating gear (22), the first transmission gear (51), the second gear group (42) and the first gear group (34) are meshed and connected in sequence. Under the action of the torsion spring (32), the potential energy is released and converted into the rotational kinetic energy of the shaft (33), and then the kinetic energy is transmitted to the wheel shaft (21) through the transmission between the gears, so as to push the wheelchair to continue to travel a certain distance on the flat road; S4. When the wheelchair is moving on a flat road, the stop lever (61) is moved to disconnect the ratchet gear ring (24) from the inner ratchet (23), and at the same time, the energy release assembly (4) and the second transmission gear (52) are disconnected, so that the wheelchair can be pushed in different directions.

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