Portable lower limb motion injury rehabilitation training device

Abstract

The application relates to the technical field of rehabilitation training, and discloses a portable lower limb motion injury rehabilitation training device, which comprises a shell supporting mechanism, a holding mechanism is arranged on the surface of the shell supporting mechanism, an electromagnetic damping mechanism is arranged in the shell supporting mechanism, a counterweight mechanism is arranged in the electromagnetic damping mechanism, a safety mechanism is arranged on the two sides of the counterweight mechanism, and a power assisting mechanism is arranged between the safety mechanism and the electromagnetic damping mechanism. The portable lower limb motion injury rehabilitation training device is provided with the shell supporting mechanism, the holding mechanism, the electromagnetic damping mechanism, the counterweight mechanism, the safety mechanism and the power assisting mechanism, can realize active training by driving the counterweight mechanism to rotate through active leg movement during training, can realize passive training by driving the leg to passively move through the power assisting mechanism, and can provide different training modes for patients in different recovery periods.

Description

Technical Field

[0001] This invention relates to the field of rehabilitation training technology, specifically a portable rehabilitation training device for lower limb sports injuries. Background Technology

[0002] Effective exercise is necessary during the recovery period after knee injury or surgery. Appropriate and effective rehabilitation exercises play a very important role in restoring knee joint function.

[0003] Although there are many portable rehabilitation training devices in the existing technology, most of them can only achieve training in one mode. Patients cannot adjust the resistance according to the degree of recovery. They can only move actively and it is difficult to use the device to assist the limbs in movement. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a portable lower limb sports injury rehabilitation training device, which solves the problems mentioned in the background.

[0005] The present invention provides the following technical solution: a portable lower limb sports injury rehabilitation training device, comprising: a shell support mechanism, a gripping mechanism mounted on the surface of the shell support mechanism, an electromagnetic damping mechanism mounted inside the shell support mechanism, a counterweight mechanism disposed inside the electromagnetic damping mechanism, safety mechanisms disposed on both sides of the counterweight mechanism, and an assist mechanism disposed between the safety mechanism and the electromagnetic damping mechanism.

[0006] Preferably, the shell support mechanism includes a cover shell, side plates, convex covers, and a buffer sleeve. There are two side plates, and the two side plates are respectively fixedly connected to the inner walls on both sides of the cover shell. The convex covers are integrally disposed in the middle of the two side plates, and the buffer sleeve is fixedly sleeved on the surface of the cover shell.

[0007] Preferably, the housing support mechanism further includes a foot, a fixed roller shaft, a support roller, a movable roller shaft, a moving roller, and an anti-slip sleeve. The foot is fixedly connected between the two side plates, the fixed roller shaft is fixedly inserted into the inside of the foot, the support roller is fixedly sleeved on the surface of the fixed roller shaft, the movable roller shaft is rotatably connected to the inside of the foot through a bearing, the moving roller is fixedly sleeved on the surface of the movable roller shaft, and the anti-slip sleeve is fixedly sleeved on the surfaces of the support roller and the moving roller, respectively.

[0008] Preferably, the gripping mechanism includes a ring rail, a slide, a grip handle, and a grip sleeve. There are two ring rails, and the two ring rails are respectively fixedly sleeved on the surfaces of two convex covers. The two ring rails are both C-shaped. The slides are slidably connected to the surfaces of the two ring rails. The grip handles are respectively fixedly connected between the two slides. The grip sleeve is fixedly sleeved on the surface of the grip handle.

[0009] Preferably, the electromagnetic damping mechanism includes an inner frame, electromagnets, and isolation plates. The inner frame is fixedly connected between two side plates and is located inside the casing. There are multiple electromagnets and multiple isolation plates. The multiple electromagnets and multiple isolation plates are all fixedly connected inside the inner frame. The multiple electromagnets and multiple isolation plates are intermittently distributed. An electromagnetic damping groove is provided on one side of each of the multiple electromagnets.

[0010] Preferably, the counterweight mechanism includes a collar, a connecting cylinder, a limiting parallel connecting cylinder, an isolation sleeve, a conductor disc, and a pin. The collar is rotatably connected to the inner walls on both sides of the inner frame via bearings. The connecting cylinder is fixedly connected between two collars. The limiting parallel connecting cylinder is fixedly sleeved on the surface of the connecting cylinder, and there are two limiting parallel connecting cylinders, which are distributed opposite to each other. There are multiple isolation sleeves, which are fixedly sleeved on the surfaces of two limiting parallel connecting cylinders. The conductor discs are respectively fixedly installed on the surfaces of multiple isolation sleeves, and the conductor discs are located inside the electromagnetic damping groove. The pin is fixedly inserted between multiple isolation sleeves, and the multiple conductor discs are distributed in parallel.

[0011] Preferably, the safety mechanism includes an intermediate shaft, a foot handle, and a foot pedal. The intermediate shaft is rotatably connected between two collars via bearings. The foot handles are respectively fixedly sleeved on both ends of the intermediate shaft, and the two foot handles are staggered. The foot pedals are respectively rotatably connected to the ends of the two foot handles away from the intermediate shaft.

[0012] Preferably, the safety mechanism further includes a sleeve wheel, a one-way actuating tooth, and a spring. There are two sleeve wheels, and both sleeve wheels are fixedly sleeved on the surface of the intermediate shaft. There are multiple one-way actuating teeth, and the multiple one-way actuating teeth are rotatably connected to the surfaces of the two sleeve wheels. The surfaces of the one-way actuating teeth are provided with inclined surfaces, and each sleeve wheel surface is provided with two sets of one-way actuating teeth, and the two sets of one-way actuating teeth are distributed in opposite directions. The spring is fixedly connected to one side of the one-way actuating teeth, and the surface of the spring is slidably connected to the surface of the sleeve wheel.

[0013] Preferably, the safety mechanism further includes a toothed seat and a toothed ring. The toothed seat is fixedly connected to one end of the collar, and the toothed ring is fixedly connected to one side of the side plate. A toothed groove is provided on one side of the toothed seat, and one-way meshing teeth are provided on the inner wall of the toothed groove and the inner wall of the toothed ring.

[0014] Preferably, the assist mechanism includes an assist motor, a drive wheel, a driven wheel, a transmission belt, a speed sensor, and a speed detection gear. The assist motor and the speed sensor are respectively fixedly installed on both sides of the inner frame. The drive wheel is fixedly installed at the output end of the assist motor. The driven wheel and the speed detection gear are respectively fixedly sleeved on the surfaces of two sleeve wheels, with the driven wheel located on one side of the drive wheel and the speed detection gear located on one side of the speed sensor. The transmission belt is installed between the drive wheel and the driven wheel, and the drive wheel is connected to the driven wheel through the transmission belt.

[0015] Compared with the prior art, the present invention has the following beneficial effects: This portable lower limb sports injury rehabilitation training device, through its shell support mechanism, gripping mechanism, electromagnetic damping mechanism, counterweight mechanism, safety mechanism, and assist mechanism, enables active training by rotating the counterweight mechanism through active leg movements, and passive training by passive leg movements through the assist mechanism. This allows for different training modes to be provided for patients at different stages of recovery.

[0016] This portable lower limb sports injury rehabilitation training device, through its encasing shell, side plates, convex covers, buffer sleeves, footrests, fixed roller shafts, support rollers, moving roller shafts, movable rollers, and anti-slip sleeves, can ensure the stability of the device during training by having the support rollers and movable rollers work together to prevent the device from sliding. When moving, the movable rollers provide independent support, and the rolling action reduces friction, ensuring that the device can move flexibly.

[0017] This portable lower limb sports injury rehabilitation training device, through its ring track, slide, handle, and grip sleeve, allows for fine-tuning of the handle's position by sliding the slide on the ring track. This improves stability during training by holding the handle, and propels the device forward by pulling the handle during movement.

[0018] This portable lower limb sports injury rehabilitation training device, through its internal frame, electromagnet, and isolation plate, can adjust the magnitude of electromagnetic damping by changing the magnetic force of the electromagnet, allowing patients to adjust the resistance during training according to their recovery level.

[0019] This portable lower limb sports injury rehabilitation training device, through its collar, connecting cylinder, limiting and connecting cylinder, isolation collar, conductor disk and plug pin, can cooperate with an electromagnet to form electromagnetic damping, and increase the inertia of the device through the weight of the conductor disk, thereby converting electromagnetic damping into resistance to provide training for patients.

[0020] This portable lower limb sports injury rehabilitation training device, through its intermediate shaft, foot pedal, foot pedal, swivel wheel, one-way pawl, spring, toothed seat, and toothed ring, can prevent the inertia of the conductor disc from causing a reverse impact on the patient when the patient stops pedaling, thus improving the safety of the device.

[0021] This portable lower limb sports injury rehabilitation training device, through its auxiliary motor, drive wheel, driven wheel, transmission belt, speed sensor, and speed detection gear, can drive the intermediate shaft to rotate via the auxiliary motor, thereby providing assisted training, and monitor the speed by feeding the speed back to the circuit via the speed sensor. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a schematic diagram of the structure of the present invention during movement; Figure 3 This is a schematic diagram of the internal exploded structure of the shell support mechanism of the present invention; Figure 4 This is a schematic diagram of the structure at the location of the conductor disk in this invention; Figure 5 This is a cross-sectional view at the location of the conductor disk in this invention; Figure 6 This is an exploded structural diagram of the inner frame location of the present invention; Figure 7 This is a schematic diagram of the structure at the location of the insurance institution in this invention; Figure 8 This is a schematic diagram of the structure at the position of the sleeve wheel in this invention; Figure 9 This is a schematic diagram of the holding mechanism of the present invention.

[0023] In the diagram: 101. Cover shell; 102. Side plate; 103. Convex cover; 104. Buffer sleeve; 105. Leg frame; 106. Fixed roller shaft; 107. Support roller; 108. Moving roller shaft; 109. Moving roller; 110. Anti-slip sleeve; 201. Ring rail; 202. Slide carriage; 203. Handle; 204. Handle sleeve; 301. Inner frame; 302. Electromagnet; 303. Isolation plate; 401. Shaft collar; 402. Connecting cylinder; 4 03. Limiting and connecting cylinder; 404. Isolation collar; 405. Conductor disc; 406. Insertion pin; 501. Intermediate shaft; 502. Foot pedal; 503. Foot pedal; 504. Sleeve wheel; 505. One-way actuating tooth; 506. Spring; 507. Gear seat; 508. Gear ring; 601. Power assist motor; 602. Drive wheel; 603. Driven wheel; 604. Drive belt; 605. Speed ​​sensor; 606. Speed ​​detection gear. Detailed Implementation

[0024] 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.

[0025] Please see Figure 1-9 A portable lower limb sports injury rehabilitation training device includes: a shell support mechanism; a gripping mechanism mounted on the surface of the shell support mechanism; an electromagnetic damping mechanism installed inside the shell support mechanism; a counterweight mechanism installed inside the electromagnetic damping mechanism; safety mechanisms on both sides of the counterweight mechanism; and an assisting mechanism installed between the safety mechanisms and the electromagnetic damping mechanism. Through the shell support mechanism, gripping mechanism, electromagnetic damping mechanism, counterweight mechanism, safety mechanism, and assisting mechanism, active training can be achieved by actively rotating the counterweight mechanism through leg movements during training. Simultaneously, passive training can be achieved by passively moving the legs through the assisting mechanism, thus facilitating different training modes for patients at different recovery stages.

[0026] The shell support mechanism includes a shell 101, side plates 102, convex covers 103, and buffer sleeves 104. There are two side plates 102, and the two side plates 102 are fixedly connected to the inner walls on both sides of the shell 101. The convex covers 103 are integrally set in the middle of the two side plates 102. The buffer sleeves 104 are fixedly sleeved on the surface of the shell 101.

[0027] The housing support mechanism further includes a foot bracket 105, a fixed roller shaft 106, a support roller 107, a movable roller shaft 108, a moving roller 109, and anti-slip sleeves 110. The foot bracket 105 is fixedly connected between the two side plates 102. The fixed roller shaft 106 is fixedly inserted into the inside of the foot bracket 105. The support roller 107 is fixedly sleeved on the surface of the fixed roller shaft 106. The movable roller shaft 108 is rotatably connected to the inside of the foot bracket 105 via bearings. The moving roller 109 is fixedly sleeved on the surface of the movable roller shaft 108. The anti-slip sleeves 110 are fixedly sleeved on the surface of the movable roller shaft 108. The support roller 107 and the moving roller 109 are attached to the surface of the support roller 107 and the moving roller 109. Through the provided cover shell 101, side plate 102, convex cover 103, buffer sleeve 104, foot 105, fixed roller shaft 106, support roller 107, moving roller shaft 108, moving roller 109 and anti-slip sleeve 110, the stability of the device can be ensured by the support roller 107 and the moving roller 109 together during training, and the device can be prevented from sliding. When moving, the moving roller 109 provides independent support, and the rolling reduces friction, ensuring that the device can move flexibly.

[0028] The gripping mechanism includes a ring rail 201, a slide 202, a grip handle 203, and a grip sleeve 204. There are two ring rails 201, which are fixedly fitted onto the surfaces of two convex covers 103. Both ring rails 201 are C-shaped. The slides 202 are slidably connected to the surfaces of the two ring rails 201. The grip handles 203 are fixedly connected between the two slides 202. The grip sleeve 204 is fixedly fitted onto the surface of the grip handles 203. Through the ring rails 201, slides 202, grip handles 203, and grip sleeves 204, the position of the grip handles 203 can be finely adjusted by sliding the slides 202 on the ring rails 201. This improves stability during training by holding the grip handles 203, and propels the device forward by pulling the grip handles 203 during movement.

[0029] The electromagnetic damping mechanism includes an inner frame 301, electromagnets 302, and isolation plates 303. The inner frame 301 is fixedly connected between two side plates 102 and is located inside the casing 101. There are multiple electromagnets 302 and multiple isolation plates 303, all of which are fixedly connected inside the inner frame 301. The multiple electromagnets 302 and multiple isolation plates 303 are intermittently distributed, and each of the multiple electromagnets 302 has an electromagnetic damping groove on one side. Through the inner frame 301, electromagnets 302, and isolation plates 303, the magnitude of electromagnetic damping can be adjusted by changing the magnetic force of the electromagnets 302, allowing the patient to adjust the damping according to the recovery process. The resistance during training is adjusted. Electromagnetic damping refers to the phenomenon that when a conductor moves in a magnetic field, the induced current causes the conductor to experience an Ampere force, and the direction of the Ampere force always opposes the movement of the conductor. Electromagnetic damping originates from the principle of electromagnetic induction. The macroscopic phenomenon is that when a closed conductor moves relative to a magnetic pole, an electromagnetic resistance is generated between the two, which hinders the relative movement. This phenomenon can be explained by Lenz's law: when a closed conductor moves and cuts magnetic field lines with a magnetic pole, the magnetic flux penetrating the closed conductor changes, and an induced current, or motional current, is generated in the closed conductor. The magnetic field generated by this current will hinder the relative movement between the two, and the magnitude of the resistance is proportional to the magnetic induction intensity of the magnet, the relative speed, and other physical quantities.

[0030] The counterweight mechanism includes a collar 401, a connecting cylinder 402, a limiting and connecting cylinder 403, an isolation collar 404, a conductor disc 405, and a plug pin 406. The collar 401 is rotatably connected to the inner walls on both sides of the inner frame 301 via bearings. The connecting cylinder 402 is fixedly connected between the two collars 401. The limiting and connecting cylinder 403 is fixedly sleeved on the surface of the connecting cylinder 402, and there are two limiting and connecting cylinders 403, which are relatively distributed. There are multiple isolation collars 404, and multiple isolation collars 404 are fixedly sleeved on the two limiting and connecting cylinders 401. On the surface of 03, conductor disks 405 are fixedly installed on the surfaces of multiple isolation collars 404, and the conductor disks 405 are located inside the electromagnetic damping groove. Insert pins 406 are fixedly inserted between the multiple isolation collars 404, and the multiple conductor disks 405 are distributed in parallel. Through the provided collar 401, connecting cylinder 402, limiting and connecting cylinder 403, isolation collar 404, conductor disks 405 and insert pins 406, they can cooperate with electromagnet 302 to form electromagnetic damping, and increase the inertia of the device through the self-weight of the conductor disks 405, thereby converting electromagnetic damping into resistance to provide training for the patient.

[0031] The safety mechanism includes an intermediate shaft 501, a foot pedal 502, and a foot pedal 503. The intermediate shaft 501 is rotatably connected between two collars 401 via bearings. The foot pedal 502 is fixedly sleeved on both ends of the intermediate shaft 501, and the two foot pedals 502 are staggered. The foot pedal 503 is rotatably connected to the ends of the two foot pedals 502 that are away from the intermediate shaft 501.

[0032] The insurance mechanism also includes a sleeve wheel 504, a one-way actuating tooth 505, and a spring 506. There are two sleeve wheels 504, and both sleeve wheels 504 are fixedly sleeved on the surface of the intermediate shaft 501. There are multiple one-way actuating teeth 505, and the multiple one-way actuating teeth 505 are rotatably connected to the surfaces of the two sleeve wheels 504. The surfaces of the one-way actuating teeth 505 are provided with inclined surfaces. Each sleeve wheel 504 surface is provided with two sets of one-way actuating teeth 505, and the two sets of one-way actuating teeth 505 are distributed in opposite directions. The spring 506 is fixedly connected to one side of the one-way actuating tooth 505, and the surface of the spring 506 is slidably connected to the surface of the sleeve wheel 504.

[0033] The safety mechanism also includes a toothed seat 507 and a toothed ring 508. The toothed seat 507 is fixedly connected to one end of the collar 401, and the toothed ring 508 is fixedly connected to one side of the side plate 102. A toothed groove is provided on one side of the toothed seat 507, and one-way meshing teeth are provided on the inner wall of the toothed groove and the inner wall of the toothed ring 508. Through the intermediate shaft 501, foot pedal 502, foot pedal 503, sleeve wheel 504, one-way actuating tooth 505, spring 506, toothed seat 507 and toothed ring 508, the inertia of the conductor disk 405 can be prevented from causing a reverse impact on the patient when the patient stops foot pedal training, thus improving the safety of the device.

[0034] The assist mechanism includes an assist motor 601, a drive wheel 602, a driven wheel 603, a transmission belt 604, a speed sensor 605, and a speed detection gear 606. The assist motor 601 and speed sensor 605 are fixedly mounted on both sides of the inner frame 301. The drive wheel 602 is fixedly mounted on the output end of the assist motor 601. The driven wheel 603 and speed detection gear 606 are respectively fixedly sleeved on the surfaces of two sleeve wheels 504, with the driven wheel 603 located on one side of the drive wheel 602 and the speed detection gear 606 located on one side of the speed sensor 605. The transmission belt 604 is installed between the drive wheel 602 and the driven wheel 603, and the drive wheel 602 is connected to the driven wheel 603 via the transmission belt 604. The assist mechanism is activated by the provided assist mechanism. The motor 601, drive wheel 602, driven wheel 603, transmission belt 604, speed sensor 605, and speed detection gear 606 can drive the intermediate shaft 501 to rotate through the motor 601, thereby providing assisted training. The speed sensor 605 feeds the speed back to the circuit to monitor the speed. The speed sensor 605 uses a magnetoresistive sensor as the sensing element. The core component uses a magnetoresistive sensor as the detection element, and the noise is reduced by a new signal processing circuit. The sensing object is a magnetic or magnetically conductive material, such as magnets, iron, and electrical steel. When the object being measured has raised or recessed magnetic or magnetically conductive material, as the object rotates, the sensor outputs a pulse signal related to the rotation frequency to achieve the purpose of speed measurement or displacement detection.

[0035] Working principle: When in use, pull the handle 203 to move the device next to the seat, then straighten the device, hold the handle 203 and step on the foot pedal 503. The electromagnet 302 is energized. The magnetic force of the electromagnet 302 can be adjusted by adjusting the current of the electromagnet 302. In active mode, leg movements drive the foot pedal 502 to rotate. Due to the directional limitation of the toothed ring 508, the foot pedal 502 can only rotate in one direction. When the foot pedal 502 rotates, it drives the sleeve wheel 504 to rotate via the intermediate shaft 501. The sleeve wheel 504 drives the tooth seat 507 via the unidirectional actuating tooth 505. The tooth seat 507 drives the limiting and connecting cylinder 403 and the isolation sleeve 404 via the connecting cylinder 402, which in turn drives the conductor disk 405 to rotate, thereby achieving lower limb exercise. When the rotation speed increases, the conductor disk 405 cuts the magnetic field lines, generating electromagnetic damping that hinders its rotation. The resistance of the conductor disk 405 when rotating can be adjusted by adjusting the magnetic force of the electromagnet 302. When training stops, the foot pedal 503 is stopped. At this time, the foot pedal 502 and the intermediate shaft 501 stop rotating. However, due to the inertia of the conductor disk 405, the conductor disk 405 will drive the tooth seat 507, the connecting cylinder 402, the limiting connecting cylinder 403 and the isolation collar 404 to continue rotating. At this time, the tooth seat 507 will press down on the one-way actuating tooth 505, so that the one-way actuating tooth 505 will give way, preventing the sleeve wheel 504 and the intermediate shaft 501 from continuing to rotate, thereby ensuring safety. In passive mode, the assist motor 601 is activated. The assist motor 601 drives the transmission belt 604 through the drive wheel 602, which in turn drives the driven wheel 603 to rotate. The driven wheel 603 drives the intermediate shaft 501 to rotate through the sleeve wheel 504. The intermediate shaft 501 drives the foot pedal 503 to rotate through the foot handle 502, which in turn drives the leg movement. At the same time, the speed sensor 605 detects the speed of the speed detection gear 606 and feeds it back to the circuit to realize speed monitoring.

[0036] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A portable lower limb sports injury rehabilitation training device, characterized in that, include: A housing support mechanism is provided, with a gripping mechanism installed on its surface, an electromagnetic damping mechanism installed inside the housing support mechanism, a counterweight mechanism installed inside the electromagnetic damping mechanism, safety mechanisms on both sides of the counterweight mechanism, and an assist mechanism installed between the safety mechanisms and the electromagnetic damping mechanism. The shell support mechanism includes a shell (101) and side plates (102). There are two side plates (102), and the two side plates (102) are respectively fixedly connected to the inner walls on both sides of the shell (101). The electromagnetic damping mechanism includes an inner frame (301), an electromagnet (302), and an isolation plate (303). The inner frame (301) is fixedly connected between two side plates (102) and is located inside the shell (101). There are multiple electromagnets (302) and multiple isolation plates (303). Multiple electromagnets (302) and multiple isolation plates (303) are fixedly connected inside the inner frame (301). Multiple electromagnets (302) and multiple isolation plates (303) are intermittently distributed. An electromagnetic damping groove is opened on one side of each of the multiple electromagnets (302). The counterweight mechanism includes a collar (401), a connecting cylinder (402), a limiting and connecting cylinder (403), an isolation collar (404), a conductor disc (405), and a plug pin (406). The collar (401) is rotatably connected to the inner walls on both sides of the inner frame (301) via bearings. The connecting cylinder (402) is fixedly connected between the two collars (401). The limiting and connecting cylinder (403) is fixedly sleeved on the surface of the connecting cylinder (402), and the number of limiting and connecting cylinders (403) is two. There are multiple isolation collars (404), and multiple isolation collars (404) are fixedly sleeved on the surfaces of the two limiting parallel cylinders (403). The conductor disks (405) are respectively fixedly installed on the surfaces of multiple isolation collars (404), and the conductor disks (405) are located inside the electromagnetic damping groove. The plug pins (406) are fixedly inserted between multiple isolation collars (404), and multiple conductor disks (405) are distributed in parallel.

2. The portable lower limb sports injury rehabilitation training device according to claim 1, characterized in that, The shell support mechanism also includes a convex cover (103) and a buffer sleeve (104). The convex cover (103) is integrally disposed in the middle of the two side plates (102), and the buffer sleeve (104) is fixedly sleeved on the surface of the shell (101).

3. The portable lower limb sports injury rehabilitation training device according to claim 2, characterized in that, The housing support mechanism also includes a stand (105), a fixed roller shaft (106), a support roller (107), a moving roller shaft (108), a movable roller (109), and an anti-slip sleeve (110). The stand (105) is fixedly connected between two side plates (102). The fixed roller shaft (106) is fixedly inserted into the inside of the stand (105). The support roller (107) is fixedly sleeved on the surface of the fixed roller shaft (106). The moving roller shaft (108) is rotatably connected to the inside of the stand (105) through a bearing. The movable roller (109) is fixedly sleeved on the surface of the moving roller shaft (108). The anti-slip sleeve (110) is fixedly sleeved on the surfaces of the support roller (107) and the movable roller (109), respectively.

4. The portable lower limb sports injury rehabilitation training device according to claim 2, characterized in that, The gripping mechanism includes a ring rail (201), a slide (202), a grip handle (203), and a grip sleeve (204). There are two ring rails (201), and the two ring rails (201) are respectively fixedly sleeved on the surfaces of two convex covers (103). The two ring rails (201) are both C-shaped. The slide (202) is slidably connected to the surfaces of the two ring rails (201). The grip handle (203) is respectively fixedly connected between the two slides (202). The grip sleeve (204) is fixedly sleeved on the surface of the grip handle (203).

5. A portable lower limb sports injury rehabilitation training device according to claim 1, characterized in that, The safety mechanism includes an intermediate shaft (501), a foot pedal (502), and a foot pedal (503). The intermediate shaft (501) is rotatably connected between two collars (401) via bearings. The foot pedals (502) are respectively fixedly sleeved on both ends of the intermediate shaft (501), and the two foot pedals (502) are staggered. The foot pedals (503) are respectively rotatably connected to the ends of the two foot pedals (502) away from the intermediate shaft (501).

6. A portable lower limb sports injury rehabilitation training device according to claim 5, characterized in that, The insurance mechanism further includes a sleeve wheel (504), a one-way actuating tooth (505), and a spring (506). There are two sleeve wheels (504), and both sleeve wheels (504) are fixedly sleeved on the surface of the intermediate shaft (501). There are multiple one-way actuating teeth (505), and multiple one-way actuating teeth (505) are rotatably connected to the surfaces of the two sleeve wheels (504). The surfaces of the one-way actuating teeth (505) are provided with inclined surfaces, and each sleeve wheel (504) surface is provided with two sets of one-way actuating teeth (505), and the two sets of one-way actuating teeth (505) are distributed in opposite directions. The spring (506) is fixedly connected to one side of the one-way actuating tooth (505), and the surface of the spring (506) is slidably connected to the surface of the sleeve wheel (504).

7. A portable lower limb sports injury rehabilitation training device according to claim 6, characterized in that, The safety mechanism also includes a toothed seat (507) and a toothed ring (508). The toothed seat (507) is fixedly connected to one end of the collar (401), and the toothed ring (508) is fixedly connected to one side of the side plate (102). A toothed groove is provided on one side of the toothed seat (507), and one-way meshing teeth are provided on the inner wall of the toothed groove and the inner wall of the toothed ring (508).

8. A portable lower limb sports injury rehabilitation training device according to claim 7, characterized in that, The assist mechanism includes an assist motor (601), a drive wheel (602), a driven wheel (603), a transmission belt (604), a speed sensor (605), and a speed detection gear (606). The assist motor (601) and the speed sensor (605) are respectively fixedly installed on both sides of the inner frame (301). The drive wheel (602) is fixedly installed on the output end of the assist motor (601). The driven wheel (603) and the speed detection gear (606) are respectively fixedly sleeved on the surface of two sleeve wheels (504). The driven wheel (603) is located on one side of the drive wheel (602), and the speed detection gear (606) is located on one side of the speed sensor (605). The transmission belt (604) is installed between the drive wheel (602) and the driven wheel (603), and the drive wheel (602) is connected to the driven wheel (603) through the transmission belt (604).

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