Adjustable damping ankle joint active trainer

Abstract

The application provides an adjustable damping ankle joint active trainer, which comprises a bottom plate, two boxes arranged on the bottom plate, a same center main shaft installed on the two boxes, a foot plate detachably installed on the middle section of the center main shaft and located between the two boxes, and a damping adjustment branch installed in each box, wherein the two damping adjustment branches are respectively in driving connection with the center main shaft through the locking opposite direction one-way transmission assemblies, a speed increasing mechanism connected with the end of the center main shaft, and a flywheel energy storage branch connected with the output end of the speed increasing mechanism, the ankle joint training device is small in size, does not need external power supply and can be actively driven by the user, different sizes of movement damping are obtained when the ankle joint is dorsiflexed and plantarflexed through the pure mechanical transmission structure, the flywheel is used for storing the rotating mechanical energy and maintaining the rotational inertia during the movement, the flywheel inertia is used for reducing the speed fluctuation and jerk when being driven again, and the ankle pump movement is more continuous and stable.

Description

Technical Field

[0001] This invention relates to the field of ankle joint training equipment technology, and in particular to an adjustable damping active ankle joint trainer. Background Technology

[0002] In real life, there are a large number of people who need to maintain a sitting posture for a long time, such as office workers, people who sit at home for long periods of time, and people who travel long distances by plane, train or car. When the human body is in a sitting position for a long time, the activity of the lower limb muscles is reduced, and the ankle joint lacks active flexion and extension movements, which can easily cause the speed of venous blood return in the lower limbs to decrease and blood stasis, thereby increasing the potential risk of lower limb venous thrombosis.

[0003] Ankle pump exercises involve rhythmic dorsiflexion and plantarflexion of the ankle joint, which drives the calf muscles to contract and relax periodically, acting like a muscle pump and helping to promote venous blood return in the lower limbs. Therefore, there is a real need for active ankle training devices suitable for sedentary settings.

[0004] Existing ankle training devices typically suffer from the following problems: some devices rely on motors, power supplies, or electronic control systems, resulting in complex structures, limited usage locations due to power supply conditions, and concerns about high maintenance costs and electrical safety; some purely mechanical devices only utilize springs or ordinary friction structures to provide resistance, with resistance being essentially the same in both dorsiflexion and plantarflexion directions, making it difficult to provide differentiated training damping based on the force characteristics of different ankle movement directions; simultaneously, existing devices are prone to significant resistance abrupt changes and jerks during movement reversal, making the training process less continuous and smooth, and easily causing fatigue and resistance during prolonged use; furthermore, some devices are bulky, making them inconvenient to place and use near office chairs, home chairs, and vehicle seats. Summary of the Invention

[0005] This invention proposes an adjustable damping active ankle trainer, a small-sized ankle training device that requires no external power supply and can be actively driven by the user. Through a purely mechanical transmission structure, different levels of motion damping are obtained during ankle dorsiflexion and plantarflexion. The flywheel stores rotational mechanical energy and maintains rotational inertia during movement, and the flywheel inertia reduces speed fluctuations and jerks when driving again, making the ankle pump movement more continuous and stable. This improves the convenience and willingness of sedentary people to perform continuous active ankle training.

[0006] The technical solution of this invention is implemented as follows: An adjustable damping active ankle trainer includes a base plate, two housings disposed on the base plate, a central spindle mounted on the two housings, a foot pedal detachably mounted in the middle section of the central spindle and located between the two housings, and a damping adjustment branch installed inside each housing. The user places one foot on the foot pedal, secures the foot with a strap, and actively drives the foot pedal to complete plantar flexion and dorsiflexion movements. The two damping adjustment branches are respectively connected to the central spindle through unidirectional transmission components with opposite locking directions, so that when the central spindle rotates in two opposite directions, it drives the corresponding damping adjustment branch. The two damping adjustment branches respectively form training damping for plantar flexion and dorsiflexion directions, and the plantar flexion damping and dorsiflexion damping can be adjusted independently. It also includes a speed-increasing mechanism installed in one of the housings and connected to the central spindle, and a flywheel energy storage branch connected to the output end of the speed-increasing mechanism. When the foot pedal performs plantar flexion, the corresponding damping adjustment branch works, while the other damping adjustment branch does not work. At the same time, the central spindle drives the speed-increasing mechanism and the flywheel energy storage branch to store rotational mechanical energy.

[0007] Preferably, the housing includes a fixed box and an end cap. The bottom of the fixed box is fixedly connected to the base plate by fasteners, and the end cap is installed on one side of the two fixed boxes that are far apart by fasteners.

[0008] Preferably, each damping adjustment branch includes a permanent magnet brake fixedly installed inside the corresponding fixed box, a damping adjustment ring installed on the adjustment end of the permanent magnet brake, a brake transmission gear installed on the rotating shaft of the permanent magnet brake, and a main shaft transmission gear installed on the central main shaft and meshing with the brake transmission gear. The one-way transmission component is a one-way bearing, and the one-way bearing is connected to the main shaft transmission gear.

[0009] Preferably, the top of the fixed box is provided with an adjustment hole, and the damping adjustment ring extends through the adjustment hole to the outside of the fixed box; The main shaft drive gear is fixedly connected to the outer ring of the one-way bearing, the inner ring of the one-way bearing is fixedly connected to the central main shaft circumferentially, and the central main shaft is connected to the fixed box through the central main shaft support bearing.

[0010] Preferably, the speed-increasing mechanism is a planetary speed-increasing device.

[0011] Preferably, it also includes a damping locking assembly that cooperates with each damping adjustment branch. The damping locking assembly includes a fixed base fixedly installed on the top of the fixed box, an annular portion disposed on the fixed base and coaxial with the damping adjustment ring, a bolt through hole opened on the annular portion, a plurality of circular holes opened circumferentially on the damping adjustment ring, a locking bolt for passing through the bolt through hole and the circular holes, and a nut threadedly connected to the locking bolt.

[0012] Preferably, the flywheel energy storage branch includes a flywheel shaft, a flywheel, and a flywheel one-way bearing; The end of the central spindle is connected to the input shaft of the planetary speed increaser via a first cloverleaf coupling. The output shaft of the planetary speed increaser is connected to the input end of the flywheel shaft via a second cloverleaf coupling. The flywheel shaft passes through the end cover and extends to the outside of the fixed box. One end of the flywheel shaft extending to the outside of the fixed box is connected to the flywheel via a flywheel one-way bearing. The flywheel shaft is rotatably mounted on the end cover via a flywheel shaft support bearing.

[0013] Preferably, the flywheel one-way bearing locks the transmission of torque in the first relative rotational direction and allows overtaking in the opposite direction; When the flywheel shaft rotates in the opposite direction or the angular velocity of the flywheel in the driving direction is higher than the angular velocity of the flywheel shaft, the flywheel one-way bearing enters the overrun state. When the flywheel one-way bearing is in the overrun state, the torque transmission between the flywheel and the flywheel shaft is released, and the two are allowed to rotate relative to each other.

[0014] Preferably, the middle section of the central spindle is located between the two housings, the foot pedal is connected to the middle section of the central spindle by bolts, and the foot pedal is provided with mounting holes for installing straps.

[0015] Preferably, each of the fixed boxes is provided with at least two cylindrical limiting members on the side facing the foot pedal. The two cylindrical limiting members are located on both sides of the central main shaft and are used to limit the maximum rotation position of the foot pedal in the plantarflexion direction and the dorsiflexion direction, respectively.

[0016] By adopting the above technical solution, the beneficial effects of the present invention are as follows: This invention uses a purely mechanical structure to complete directional separation, damping generation, damping adjustment, damping locking, and flywheel energy storage. It does not rely on motors, controllers, sensors, or external power supplies, thus reducing the risk of leakage and electrical faults. Its application is not limited by power supply conditions.

[0017] The two one-way bearings are locked in opposite directions, so that plantar flexion and dorsiflexion movements enter independent damping adjustment branches respectively. During plantar flexion, the damping adjustment branch corresponding to it is active, while the other damping adjustment branch is inactive. At the same time, the central spindle drives the planetary speed increaser and the flywheel energy storage branch to work. During dorsiflexion, the damping adjustment branch corresponding to it is active, while the other damping adjustment branch is inactive. Under the priority damping setting, the plantar flexion damping is greater than the dorsiflexion damping, which can form a bidirectional differentiated resistance that meets the training objectives of this device.

[0018] Two damping adjustment rings can adjust the damping in the plantar flexion and dorsiflexion directions respectively, allowing users to independently set the resistance in both directions according to their own strength and training needs.

[0019] The fixing seat, locking bolt, and nut can fix the rotation angle of the damping adjustment ring after the damping adjustment is completed, preventing the damping adjustment ring from rotating due to training vibration or accidental contact, and keeping the damping stable.

[0020] During plantar flexion, the central spindle directly drives the planetary speed increaser and flywheel energy storage branch. The planetary speed increaser increases the flywheel speed, and the flywheel stores rotational mechanical energy in a relatively small installation space. After the movement changes to dorsiflexion, the flywheel separates from the flywheel shaft rotating in the opposite direction through the flywheel one-way bearing and continues to rotate using rotational inertia. This reduces speed fluctuations and jerks when the foot pedal is repeatedly started and the movement changes direction, making the training process more continuous and smooth, which helps to increase the user's willingness to continuously perform ankle pump exercises.

[0021] The planetary speed increaser, the plum blossom coupling, the flywheel shaft and the flywheel are arranged along the axis of the right end of the central main shaft, and the damping adjustment branch is set above the central main shaft, which makes the internal structure compact and helps to reduce the overall size of the machine.

[0022] The cylindrical limiter restricts the range of plantar flexion and dorsiflexion rotation of the foot pedal, while the straps on the foot pedal secure the foot to the pedal, improving stability and safety during active training.

[0023] The two boxes are fixed on the same base plate. The whole machine has a single-leg structure, which makes it easy to place under the desk, in front of the chair and in the home. It is suitable for people who sit for long periods of time to perform repetitive active flexion and extension exercises of the ankle joint.

[0024] The end caps are removable, facilitating the installation, inspection, and replacement of internal mechanical parts; the device does not include an electrical system, requiring minimal maintenance. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 This is a three-dimensional schematic diagram of the present invention; Figure 2 This is a three-dimensional schematic diagram from another perspective of the present invention; Figure 3 This is a bottom view diagram of the present invention; Figure 4 This is a top view of the present invention; Figure 5 For the present invention Figure 4 Schematic diagram of cross-section at point AA; Figure 6 For the present invention Figure 2 Enlarged schematic diagram of the structure at point A in the middle.

[0027] in: 1. Base plate; 2. Housing; 201. Fixed box; 2011. Adjustment hole; 2012. Cylindrical limit component; 202. End cover; 3. Central spindle; 4. Foot pedal; 5. Damping adjustment branch; 501. Permanent magnet brake; 502. Damping adjustment ring; 503. Brake transmission gear; 504. Spindle transmission gear; 505. One-way bearing; 6. Damping locking assembly; 601. Fixed seat; 602. Circular part; 603. Bolt through hole; 604. Locking bolt; 605. Nut; 7. Planetary speed increaser; 8. Flywheel energy storage branch; 801. Flywheel shaft; 802. Flywheel; 803. Flywheel one-way bearing; 9. First plum blossom coupling; 10. Second plum blossom coupling; 11. Central spindle support bearing; 12. Flywheel shaft support bearing. Detailed Implementation

[0028] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0029] See Figure 1-6 The present invention provides an adjustable damping ankle joint active trainer, including a base plate 1, two housings 2 disposed on the base plate 1, a central spindle 3 mounted on the two housings 2, a foot pedal 4 detachably mounted in the middle section of the central spindle 3 and located between the two housings 2, a damping adjustment branch 5 installed inside each housing 2, and a damping locking assembly 6 cooperating with each damping adjustment branch 5. When using this invention, the user places one foot on the foot pedal 4, secures the foot with a strap, and actively drives the foot pedal 4 to complete plantar flexion and dorsiflexion movements.

[0030] Two damping adjustment branches 5 are respectively connected to the central spindle 3 through unidirectional transmission components with opposite locking directions, so that when the central spindle 3 rotates in two opposite directions, it drives the corresponding damping adjustment branches 5 respectively; the two damping adjustment branches 5 respectively form training damping for plantar flexion and dorsiflexion directions, and the plantar flexion damping and dorsiflexion damping can be adjusted independently. For example, such as Figures 1 to 5As shown, the two housings 2 are located on the left and right sides of the base plate 1, respectively. The damping adjustment branch 5 inside the left housing 2 is used to form training damping in the plantar flexion direction, and the damping adjustment branch 5 inside the right housing 2 is used to form training damping in the dorsiflexion direction. At the same time, the left housing 2 and the right housing 2 are respectively provided with unidirectional transmission components with opposite locking directions. This arrangement allows the power to be transmitted to the corresponding damping adjustment branch 5 when the central main shaft 3 rotates in two opposite directions.

[0031] The adjustable damping ankle joint active trainer also includes an acceleration mechanism set in one of the housings 2 and connected to the end of the central main shaft 3, and a flywheel energy storage branch 8 connected to the output end of the acceleration mechanism. When the foot pedal 4 performs plantar flexion, the corresponding damping adjustment branch 5 works, and the other damping adjustment branch 5 does not work. At the same time, the central main shaft 3 drives the acceleration mechanism and the flywheel energy storage branch 8 to store rotational mechanical energy. In some embodiments, the speed-increasing mechanism is a planetary speed-increasing device 7, for example, such as Figure 5 As shown, the planetary speed increaser 7 is fixedly installed in the right housing 2, and the planetary speed increaser 7 is connected to the end of the central spindle 3. When the foot pedal 4 performs plantar flexion, the damping adjustment branch 5 in the left housing 2 works, while the damping adjustment branch 5 in the right housing 2 does not work. At the same time, the central spindle 3 drives the planetary speed increaser 7 and the flywheel energy storage branch 8.

[0032] This adjustable damping ankle active trainer achieves power transmission, rotation direction separation, damping adjustment, damping locking, and flywheel energy storage entirely through a mechanical structure, without the need for motors, sensors, controllers, or external power supplies.

[0033] The housing 2 includes a fixed box 201 and an end cover 202. The bottom of the fixed box 201 is fixedly connected to the base plate 1 by fasteners, and the end cover 202 is installed on the side of the two fixed boxes 201 that are far apart by fasteners. For example, such as Figures 1 to 5 As shown, the base plate 1 is located at the bottom of the trainer, and the two boxes 2 are fixed to the left and right sides of the base plate 1 by fasteners. The base plate 1 is used to connect and fix the boxes 2 located on the left and right sides, and maintain the relative position between the left and right boxes 2. The left-side housing 2 and the right-side housing 2 are arranged opposite to each other, forming an installation space and rotation space for the foot pedal 4. The middle section of the central spindle 3 is located between the left and right housings 2, and the left and right ends of the central spindle 3 extend into the left-side housing 2 and the right-side housing 2, respectively. The fasteners used between the left-side fixing box 201 and the right-side fixing box 201 and the base plate 1 include, but are not limited to, bolts. In other embodiments, the left-side fixing box 201 and the right-side fixing box 201 can be manufactured separately and fixed to the base plate 1, or they can form an integral structure with the base plate 1. The fasteners used between the end cover 202 and the fixed box 201 are bolts. After removing the corresponding bolts, the end cover 202 can be removed to complete the installation, adjustment and maintenance of the internal components of the box 2. In some other embodiments, the fasteners used between the end cover 202 and the fixed box 201 can be screws or snap-fit ​​connections, as long as assembly can be completed.

[0034] Each damping adjustment branch 5 includes a permanent magnet brake 501 fixedly installed inside the corresponding fixed box 201, a damping adjustment ring 502 installed on the adjustment end of the permanent magnet brake 501, a brake transmission gear 503 installed on the rotating shaft of the permanent magnet brake 501, and a main shaft transmission gear 504 installed on the central main shaft 3 and meshing with the brake transmission gear 503. The one-way transmission component is a one-way bearing 505, which is connected to the main shaft transmission gear 504. An adjustment hole 201 is provided on the top of the fixed box 201. 1. The damping adjustment ring 502 extends through the adjustment hole 2011 to the outside of the fixed box 201; the main shaft drive gear 504 is connected to the outer ring of the one-way bearing 505, and the inner ring of the one-way bearing 505 is connected to the central main shaft 3 by a key; the central main shaft 3 is connected to the fixed box 201 by the central main shaft support bearing 11, which supports and fixes the central main shaft 3; the damping adjustment ring 502 extends from the adjustment hole 2011 at the top of the fixed box 201 so that the user can adjust the damping outside the fixed box 201.

[0035] In some embodiments, the one-way bearing 505 serves as a one-way transmission component, for example, as shown in... Figures 1 to 6 As shown, the two damping adjustment branches 5 are respectively set inside the left box 2 and the right box 2. It should be noted that the locking direction of the one-way bearing 505 in the right box 2 is opposite to that of the one-way bearing 505 in the left box 2. When the central spindle 3 rotates in the plantar flexion direction, the one-way bearing 505 inside the left housing 2 locks. The central spindle 3 drives the left one-way bearing 505 through a key. The left one-way bearing 505 drives the left spindle drive gear 504 to rotate. The left spindle drive gear 504 then drives the left brake drive gear 503 and the left permanent magnet brake 501 to rotate. The resistance generated by the left permanent magnet brake 501 is transmitted to the central spindle 3 and the foot pedal 4 along the opposite path, thus forming training damping in the plantar flexion direction. When the central spindle 3 rotates in the plantar flexion direction, the one-way bearing 505 on the right side is in an overrunning state, and the damping adjustment branch 5 on the right side does not transmit the main resistance in this direction to the central spindle 3. When the central spindle 3 rotates in the backbend direction, the one-way bearing 505 inside the housing 2 on the right side locks. The central spindle 3 then drives the one-way bearing 505 on the right side, the spindle drive gear 504 on the right side, the brake drive gear 503 on the right side, and the permanent magnet brake 501 on the right side to rotate in sequence, thereby forming training damping in the backbend direction. When the central spindle 3 rotates in the backbend direction, the left one-way bearing 505 is in an overrun state, and the left damping adjustment branch 5 does not transmit the main resistance in this direction to the central spindle 3. In a preferred embodiment, the right dorsiflexion damping is less than the left plantarflexion damping. When the damping adjustment ring 502 is rotated, the damping of the permanent magnet brake 501 changes accordingly. The damping in the left and right directions is independently adjusted by the damping adjustment rings 502 located on the left and right sides respectively. The central spindle 3 is connected to the fixed box 201 by the central spindle support bearing 11. The central spindle support bearing 11 can be a deep groove ball bearing. The deep groove ball bearing and its related parts are installed and axially positioned by the shaft shoulder, the hole elastic retaining ring, the bolt and the corresponding connecting parts. This is the existing technology and will not be described in detail here.

[0036] In other embodiments, the one-way bearing 505 can be replaced by an overrunning clutch, a ratchet and pawl mechanism, a wedge-type one-way clutch, or a roller-type one-way clutch. The common feature of these alternative components is that they transmit torque in one direction and allow overrunning or freewheeling in the opposite direction. These alternative components are used for one-way drive assemblies.

[0037] In other embodiments, the gear drive between the permanent magnet brake 501 and the central spindle 3 can be replaced by a synchronous belt drive, chain drive, or friction wheel drive. All alternative transmission structures are used to transmit torque between the permanent magnet brake 501 and the central spindle 3.

[0038] In other embodiments, the permanent magnet brake 501 can be replaced with a mechanical damping component that does not require external power and can provide adjustable rotational resistance, including but not limited to friction brakes, liquid dampers, permanent magnet eddy current dampers, or magnetic eddy current dampers and elastic damping assemblies that do not require external power supply; the common feature of the alternative components is that they can apply resistance to the central spindle 3 and allow the user to adjust the resistance.

[0039] The damping locking assembly 6 includes a fixed base 601 fixedly installed on the top of the fixed box 201, an annular portion 602 disposed on the fixed base 601 and coaxial with the damping adjusting ring 502, a bolt through hole 603 opened on the annular portion 602, a plurality of circular holes opened circumferentially on the damping adjusting ring 502, a locking bolt 604 for passing through the bolt through hole 603 and the circular holes, and a nut 605 threadedly connected to the locking bolt 604.

[0040] For example, such as Figure 1 , Figure 2 , Figure 5 and Figure 6 As shown, the two damping locking components 6 lock the damping adjustment rings 502 of the left and right housing 2 respectively, specifically as follows: After the damping adjustment ring 502 is rotated to complete the damping setting, one of the circular holes on the damping adjustment ring 502 is aligned with the bolt through hole 603 on the ring part 602. The locking bolt 604 passes through the bolt through hole 603 on the ring part 602 and the corresponding circular hole on the damping adjustment ring 502 in sequence, and is locked by the nut 605. After locking, the damping adjustment ring 502 cannot rotate relative to the housing 2, thereby fixing the angle of the damping adjustment ring 502 and maintaining the set damping. When adjusting the damping again, loosen the nut 605 and pull out or release the locking bolt 604, rotate the damping adjustment ring 502 to the new set position, then pass the locking bolt 604 through the bolt through hole 603 and the corresponding round hole and tighten the nut 605 to complete the locking of the damping adjustment ring 502.

[0041] The damping locking component 6 can prevent the damping adjustment ring 502 from rotating on its own during training vibrations or when subjected to external forces, thus keeping the damping settings in the plantar flexion and dorsiflexion directions stable.

[0042] In other embodiments, the damping locking assembly 6 can be replaced by a spring positioning pin, an indexing pin, an arc-groove locking bolt 604, a toothed positioning disc, or a friction clamping mechanism. All alternative structures are used to fix the position of the damping adjustment component after damping adjustment.

[0043] The flywheel energy storage branch 8 includes a flywheel shaft 801, a flywheel 802, and a flywheel one-way bearing 803; the end of the central main shaft 3 is connected to the input shaft of the planetary speed increaser 7 through a first plum blossom coupling 9, and the output shaft of the planetary speed increaser 7 is connected to the input end of the flywheel shaft 801 through a second plum blossom coupling 10. The flywheel shaft 801 passes through the end cover 202 and extends to the outside of the fixed box 201. One end of the flywheel shaft 801 extending to the outside of the fixed box 201 is connected to the flywheel 802 through the flywheel one-way bearing 803. The flywheel shaft 801 is rotatably mounted on the end cover 202 through the flywheel shaft support bearing 12. The flywheel shaft support bearing 12 can be a deep groove ball bearing. The deep groove ball bearing provides radial support for the flywheel shaft 801. During continuous training, the flywheel 802 stores rotational mechanical energy and maintains rotational inertia, reducing sudden changes in the speed of the foot pedal 4 and the jerking during repeated starts, making the ankle joint movement more continuous and stable.

[0044] For example, such as Figure 5 As shown, the planetary speed increaser 7 is installed inside the right-side housing 2. The flywheel energy storage branch 8 is installed in conjunction with the right-side housing 2. The flywheel shaft 801 passes through the end cover 202. The flywheel 802 is installed outside the fixed housing 201 and arranged sequentially along the axis of the right end of the central main shaft 3. The length of the right-side fixed housing 201 along the axis of the central main shaft 3 is greater than the length of the left-side fixed housing 201 along the axis of the central main shaft 3, so as to accommodate the planetary speed increaser 7, the first plum blossom coupling 9, the second plum blossom coupling 10, the flywheel shaft 801 and its support structure. The planetary speed increaser 7 is fixed inside the right-side fixed housing 201.

[0045] The flywheel one-way bearing 803 locks in the transmission of torque in the first relative rotation direction and allows overrunning in the opposite direction. When the flywheel shaft 801 rotates in the reverse direction or the angular velocity of the flywheel 802 in the driving direction is higher than the angular velocity of the flywheel shaft 801, the flywheel one-way bearing 803 enters the overrunning state. In the overrunning state, the flywheel one-way bearing 803 releases torque transmission between the flywheel 802 and the flywheel shaft 801, allowing them to rotate relative to each other. Specifically: When the central spindle 3 rotates in the plantar flexion direction, the central spindle 3 transmits power through the first plum blossom coupling 9, the planetary speed increaser 7, the second plum blossom coupling 10 and the flywheel shaft 801. The flywheel one-way bearing 803 locks and drives the flywheel 802 to rotate. The planetary speed increaser 7 increases the speed of the flywheel 802, so that the flywheel 802 stores rotational mechanical energy. At this time, the damping adjustment branch 5 located in the left housing 2 is working, while the other damping adjustment branch 5 located in the right housing 2 is not working. When the central spindle 3 rotates in the backbend direction or the speed of the flywheel 802 is higher than that of the flywheel shaft 801, the flywheel one-way bearing 803 is in an overrun state. The flywheel 802 separates from the flywheel shaft 801 that is rotating in the opposite direction and continues to rotate by its own rotational inertia, thus preventing the flywheel 802 from dragging the central spindle 3 in the opposite direction.

[0046] In other embodiments, the planetary speed increaser 7 can be replaced by a fixed-axis gear speed increaser, a synchronous belt speed increaser, or other mechanical speed increasers. The common feature of these alternative mechanisms is that they increase the rotational speed of the flywheel shaft 801 to enhance the energy storage and inertial feedback effect of the flywheel 802.

[0047] In other embodiments, the cloverleaf coupling can be replaced with other flexible couplings, rigid couplings, or gear couplings, all of which are used to connect two adjacent shafts and transmit torque.

[0048] In other embodiments, the flywheel 802 can adopt a disc-shaped, ring-shaped, or combined structure, and the mass of the flywheel 802 can be concentrated on the outer edge. The alternative structures all store mechanical energy through rotational inertia and maintain rotational continuity.

[0049] The middle section of the central spindle 3 is located between the two housings 2. The foot pedal 4 is connected to the middle section of the central spindle 3 by bolts. The foot pedal 4 is provided with mounting holes for installing straps.

[0050] For example, such as Figures 1 to 5 As shown, the foot pedal 4 is fixedly connected to the middle section of the central spindle 3 by two countersunk bolts. The axis of the central spindle 3 is set at a position that matches the rotation of the user's ankle joint. When the user actively lifts or presses down on the ball of the foot, the foot pedal 4 rotates around the axis of the central spindle 3 and drives the central spindle 3 to rotate, so that the foot pedal can rotate synchronously with the central spindle 3.

[0051] Mounting holes are provided on both sides of the foot pedal 4. The strap passes through the mounting holes and crosses the user's instep to fix the foot to the foot pedal 4, so that the foot pedal 4 rotates synchronously when the user actively lifts or presses down the ball of the foot.

[0052] In some embodiments, since different users have different foot sizes, the straps can be hook and loop straps, snap straps or adjustable length straps to meet the needs of foot fixation of different sizes. The strap mounting holes can be through holes, oblong holes or fixing ring structures, and the shape and size can meet the needs of strap installation.

[0053] In other embodiments, since the foot pedal 4 is fixedly connected to the middle section of the central spindle 3 by two countersunk bolts, the foot pedal 4 can be replaced, and different sizes of foot pedal 4 can be replaced to meet the needs of different users.

[0054] In other embodiments, different sizes of foot pedals 4 and different straps are used in combination to meet the needs of users of different sizes.

[0055] Each fixed box 201 is provided with at least two cylindrical limiting members 2012 on the side facing the foot pedal 4. The two cylindrical limiting members 2012 are located on both sides of the central main shaft 3, and are used to limit the maximum rotation position of the foot pedal 4 in the plantar flexion direction and the dorsiflexion direction, respectively.

[0056] For example, such as Figures 1 to 3As shown, each fixed box 201 has two cylindrical limiting members 2012 on the side facing the foot pedal 4, and the cylindrical limiting members 2012 on the two fixed boxes 201 are symmetrically arranged, with two cylindrical limiting members 2012 located in front of the central main shaft 3 and the other two cylindrical limiting members 2012 located behind the central main shaft 3. When the foot pedal 4 rotates to the set position in the plantar flexion or dorsiflexion direction, it contacts the corresponding cylindrical limit member 2012, thereby limiting the foot pedal 4 from continuing to rotate.

[0057] The cylindrical limiting member 2012 can limit the plantar flexion and dorsiflexion rotation range of the foot pedal 4, preventing the foot pedal 4 from exceeding the movement angle limited by the device.

[0058] In other embodiments, the cylindrical limiting member 2012 can be replaced by a limiting block, a limiting bolt, a limiting pin, or a limiting groove. All alternative structures are used to limit the maximum rotation angle of the foot pedal 4 in the plantar flexion and dorsiflexion directions, respectively.

[0059] Working principle of the invention: The user places one foot on the foot pedal 4, passes the strap through the strap mounting hole on the foot pedal 4 and fixes it to the instep. The user loosens the locking bolts 604 on the left and right boxes 2 respectively, rotates the damping adjustment rings 502 on the left and right boxes 2 to set the training damping in the plantar flexion and dorsiflexion directions, wherein the plantar flexion damping of the left box 2 is greater than the dorsiflexion damping of the right box 2. After the damping is set, align the corresponding circular hole on the damping adjustment ring 502 with the bolt through hole 603 on the ring part 602, pass the locking bolt 604 through both and tighten the nut 605 to fix the position of the damping adjustment ring 502. When the user performs plantar flexion, the foot pedal 4 drives the central spindle 3 to rotate in the plantar flexion direction. The one-way bearing 505 of the left housing 2 is locked, and the damping adjustment branch 5 of the left housing 2 is activated. The one-way bearing 505 of the right housing 2 is in an overrunning state, and the damping adjustment branch 5 of the right housing 2 is not activated. The large resistance generated by the permanent magnet brake 501 in the left housing 2 is transmitted to the central spindle 3 and the foot pedal 4 through the gear pair, the one-way bearing 505 on the left, and the key. At the same time, the right end of the central spindle 3 drives the planetary speed increaser 7 through the first plum blossom coupling 9. The planetary speed increaser 7 drives the flywheel shaft 801 to rotate through the second plum blossom coupling 10. The flywheel one-way bearing 803 is locked and drives the flywheel 802 to rotate, so that the flywheel 802 stores rotational mechanical energy. When the user performs dorsiflexion, the foot pedal 4 drives the central spindle 3 to rotate in the opposite direction. The one-way bearing 505 in the right housing 2 is locked, and the damping adjustment branch 5 in the right housing 2 is activated. The one-way bearing 505 in the left housing 2 is in an overrunning state, and the damping adjustment branch 5 in the left housing 2 is not activated. The small resistance generated by the permanent magnet brake 501 in the right housing 2 is transmitted to the central spindle 3 and the foot pedal 4 through the gear pair, the one-way bearing 505 on the right side, and the key. At this time, the flywheel one-way bearing 803 is in an overrunning state, and the flywheel 802 does not rotate in the opposite direction with the flywheel shaft 801 that is rotating in the opposite direction. Instead, it continues to rotate in the original direction by its own inertia. The plantar flexion motion simultaneously drives the planetary speed increaser 7 and the flywheel energy storage branch 8 in the right housing 2. After the action changes from plantar flexion to dorsiflexion, the flywheel one-way bearing 803 enters the overrun state, causing the flywheel 802 to separate from the flywheel shaft 801 that is rotating in the opposite direction. The flywheel 802 continues to rotate in the original direction by inertia, thereby reducing the speed fluctuation and jerking when the foot pedal 4 changes direction and performs plantar flexion motion again. When the foot pedal 4 rotates to the set angle, it contacts the corresponding cylindrical limit piece 2012 and stops rotating. The entire training process is actively driven by the user. The device only uses mechanical transmission, permanent magnet braking and flywheel energy storage to work and does not use external power.

[0060] 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 within the protection scope of the present invention.

Claims

1. An adjustable damping active ankle joint trainer, characterized in that, Includes a base plate (1), two housings (2) set on the base plate (1), a central spindle (3) installed on the two housings (2), a foot pedal (4) detachably installed in the middle section of the central spindle (3) and located between the two housings (2), and a damping adjustment branch (5) installed inside each housing (2); The user places one foot on the foot pedal (4), secures the foot with a strap, and actively drives the foot pedal (4) to complete plantar flexion and dorsiflexion movements. The two damping adjustment branches (5) are respectively connected to the central spindle (3) through unidirectional transmission components with opposite locking directions, so that when the central spindle (3) rotates in two opposite directions, it drives the corresponding damping adjustment branches (5). The two damping adjustment branches (5) respectively form training damping for plantar flexion and dorsiflexion directions. The plantar flexion damping and dorsiflexion damping can be adjusted independently. It also includes a speed-increasing mechanism installed in one of the housings (2) and connected to the central spindle (3), and a flywheel energy storage branch (8) connected to the output end of the speed-increasing mechanism. When the foot pedal (4) performs plantar flexion, the corresponding damping adjustment branch (5) works, and the other damping adjustment branch (5) does not work. At the same time, the central spindle (3) drives the speed-increasing mechanism and the flywheel energy storage branch (8) to store rotational mechanical energy.

2. The adjustable damping ankle joint active trainer according to claim 1, characterized in that: The box (2) includes a fixed box (201) and an end cover (202). The bottom of the fixed box (201) is fixedly connected to the base plate (1) by fasteners. The end cover (202) is installed on the side of the two fixed boxes (201) that are far apart by fasteners.

3. The adjustable damping ankle joint active trainer according to claim 2, characterized in that: Each of the damping adjustment branches (5) includes a permanent magnet brake (501) fixedly installed inside the corresponding fixed box (201), a damping adjustment ring (502) installed on the adjustment end of the permanent magnet brake (501), a brake transmission gear (503) installed on the rotating shaft of the permanent magnet brake (501), and a main shaft transmission gear (504) installed on the central main shaft (3) and meshing with the brake transmission gear (503). The one-way transmission assembly is a one-way bearing (505), and the one-way bearing (505) is connected to the main shaft transmission gear (504) in a transmission connection.

4. The adjustable damping ankle joint active training device according to claim 3, characterized in that: An adjustment hole (2011) is provided on the top of the fixed box (201), and the damping adjustment ring (502) extends through the adjustment hole (2011) to the outside of the fixed box (201); The main shaft drive gear (504) is fixedly connected to the outer ring of the one-way bearing (505), and the inner ring of the one-way bearing (505) is fixedly connected to the central main shaft (3) circumferentially. The central spindle (3) and the fixed box (201) are connected by a central spindle support bearing (11).

5. An adjustable damping active ankle trainer according to claim 2, characterized in that: The speed-up mechanism is a planetary speed-up unit (7).

6. The adjustable damping active ankle trainer according to claim 3, characterized in that: It also includes a damping locking assembly (6) that cooperates with each damping adjustment branch (5). The damping locking assembly (6) includes a fixed base (601) fixedly installed on the top of the fixed box (201), an annular portion (602) provided on the fixed base (601) and coaxial with the damping adjustment ring (502), a bolt through hole (603) opened on the annular portion (602), a plurality of circular holes opened circumferentially on the damping adjustment ring (502), a locking bolt (604) for passing through the bolt through hole (603) and the circular holes, and a nut (605) threadedly connected to the locking bolt (604).

7. An adjustable damping active ankle trainer according to claim 5, characterized in that: The flywheel energy storage branch (8) includes a flywheel shaft (801), a flywheel (802), and a flywheel one-way bearing (803); The end of the central spindle (3) is connected to the input shaft of the planetary speed increaser (7) through the first plum blossom coupling (9). The output shaft of the planetary speed increaser (7) is connected to the input end of the flywheel shaft (801) through the second plum blossom coupling (10). The flywheel shaft (801) passes through the end cover (202) and extends to the outside of the fixed box (201). One end of the flywheel shaft (801) extending to the outside of the fixed box (201) is connected to the flywheel (802) through the flywheel one-way bearing (803). The flywheel shaft (801) is rotatably mounted on the end cover (202) through the flywheel shaft support bearing (12).

8. An adjustable damping active ankle joint trainer according to claim 7, characterized in that: The flywheel one-way bearing (803) locks out torque transmission in the first relative rotational direction and allows overrunning in the opposite direction; When the flywheel shaft (801) rotates in the opposite direction or the angular velocity of the flywheel (802) in the driving direction is higher than the angular velocity of the flywheel shaft (801), the flywheel one-way bearing (803) enters the overrun state. The flywheel one-way bearing (803) being in the overrun state releases the torque transmission between the flywheel (802) and the flywheel shaft (801) and allows the two to rotate relative to each other.

9. An adjustable damping active ankle trainer according to claim 1, characterized in that: The middle section of the central spindle (3) is located between the two housings (2). The foot pedal (4) is connected to the middle section of the central spindle (3) by bolts. The foot pedal (4) is provided with mounting holes for installing straps.

10. An adjustable damping active ankle trainer according to claim 2, characterized in that: Each of the fixed boxes (201) is provided with at least two cylindrical limiting members (2012) on the side facing the foot pedal (4). The two cylindrical limiting members (2012) are located on both sides of the central main shaft (3) and are used to limit the maximum rotation position of the foot pedal (4) in the plantar flexion direction and the dorsiflexion direction, respectively.

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