Pedal device for exercising lower limbs

Abstract

The utility model discloses a pedal device for lower limb exercise, which relates to the technical field of fitness equipment and comprises a frame, a planetary gear mechanism mounted on the frame and two pedal components connected with two ends of the planetary gear mechanism respectively. The planetary gear mechanism comprises a guide frame fixed to the rack, an inner gear ring fixedly connected with the two ends of the guide frame, a center shaft rotationally arranged in the guide frame and planet wheel assemblies connected with the two ends of the center shaft respectively, the planet wheel assemblies comprise planet gears meshed with the inner gear ring, and the pedal assembly comprises a pedal rod and a pedal plate. The foot rest lever is connected with the planetary gear; the motion trails of the pedals are oval, the oval motion trails of the feet of a user can be achieved in the lower limb exercise process, and compared with a traditional spinning with a circular trail, the participation degree of lower limb muscle groups is improved, and then the lower limb exercise efficiency is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of fitness equipment, in particular to a foot pedal device for lower limb exercise. BACKGROUND

[0002] Spinning exercise can simulate cycling indoors for exercise, and has certain aerobic fat-burning efficiency, and has become a popular choice in the fitness field in recent years.

[0003] The transmission system of the current mainstream spinning still follows the crank-chain wheel structure of the traditional bicycle, and the movement trajectory of the pedal plate is limited to rigid circular motion. This movement can only involve the lower limb muscles of the fixed part in the movement, and cannot simulate the natural gait movement mode, resulting in low movement efficiency.

[0004] Therefore, how to provide a foot pedal device that helps to increase the participation of lower limb muscle groups and improve movement efficiency is a technical problem that those skilled in the art need to solve at present. CONTENT OF THE INVENTION

[0005] In order to help solve the above technical problems, the present application provides a foot pedal device for lower limb exercise, which adopts the following technical solutions:

[0006] A foot pedal device for lower limb exercise, comprising a rack, a planetary gear mechanism mounted on the rack, and two foot pedal assemblies connected to both ends of the planetary gear mechanism, respectively, the planetary gear mechanism comprising a guide frame fixed to the rack, an inner ring fixedly connected to both ends of the guide frame, a central shaft rotatably arranged in the guide frame, and a planetary wheel assembly connected to both ends of the central shaft, respectively, the planetary wheel assembly comprising a planetary gear meshing with the inner ring, the foot pedal assembly comprising a foot pedal rod and a foot pedal plate, the foot pedal rod being connected with the planetary gear; the movement trajectory of the foot pedal plate is an ellipse, and the long axis direction of the ellipse is horizontal.

[0007] By adopting the above technical solutions, the foot pedal device connects two foot pedal assemblies at both ends of the planetary gear mechanism, the foot pedal rod is connected with the planetary gear, and the foot pedal plate rotates the foot pedal rod to drive the planetary gear to revolve in the inner ring, so that the movement trajectory of the foot pedal plate is an elliptical trajectory simulating natural gait. In the lower limb exercise process, the user's feet can realize an elliptical movement trajectory, and the long axis direction of the ellipse is horizontal. Compared with the traditional circular trajectory spinning, the participation of the lower limb muscle groups is improved, and the efficiency of lower limb exercise is improved.

[0008] Optionally, the planetary wheel assembly further comprises a planetary wheel carrier fixedly connected with the central shaft, one end of the planetary wheel carrier is provided with a planetary wheel shaft, a rolling element is rotatably arranged on the planetary wheel shaft, a guide groove for guiding the rolling element is arranged in the guide frame, and the planetary gears are rotatably arranged at the other end of the planetary wheel shaft, and the planetary gears on both sides are symmetrically arranged relative to the central shaft.

[0009] By adopting the above technical scheme, the rotation of the planetary wheel carriers at both ends is coordinated by the central shaft, which helps to improve the coordination of the force applied by the two feet on the pedal. The planetary gears and the rolling elements are connected on the planetary wheel shaft, and the rolling elements are guided to roll in the guide groove of the guide frame, which helps to improve the stability of the planetary gear revolution. The planetary gears on both sides are symmetrically arranged relative to the central shaft, which helps to improve the coordination and stability of the force applied by the two feet on the pedal, and reduces the risk of muscle injury during exercise.

[0010] Optionally, the guide groove is an arc-shaped groove, a friction-reducing coating is arranged in the arc-shaped groove, and the radius of curvature of the arc-shaped groove matches the revolution trajectory of the planetary gear.

[0011] By adopting the above technical scheme, the guide groove is an arc-shaped groove, and a friction-reducing coating is arranged in the arc-shaped groove, which helps to reduce the noise generated during exercise. The radius of curvature of the arc-shaped groove matches the revolution trajectory of the planetary gear, which helps to improve the smoothness of the planetary gear movement.

[0012] Optionally, a length adjusting assembly for adjusting the length of the pedal rod is further arranged between the pedal rod and the pedal, the length adjusting assembly comprises a length adjusting element and a fastener, a guide rod is arranged on the length adjusting element, a guide hole matched with the guide rod is arranged on the pedal rod, a plurality of threaded holes arranged along the length direction are further arranged on the pedal rod, the length adjusting element is provided with a through hole matched with the threaded hole, and the fastener penetrates through the through hole and is threadedly connected with the threaded hole.

[0013] By adopting the above technical scheme, the pedal rod can change the elliptical movement trajectory of the pedal through the adjustment of the length adjusting assembly, so as to adapt to the needs of users with different leg lengths, and improve the applicability of the product.

[0014] Optionally, a fixed shaft is further arranged on the length adjusting element, and the pedal is rotatably arranged on the fixed shaft.

[0015] By adopting the above technical scheme, the fixed shaft is arranged on the length adjusting element, and the pedal is rotatably arranged on the fixed shaft, which helps to realize adjustable movement trajectory and meet the needs of pedal installation.

[0016] Optionally, when the length direction of the planet carrier is horizontal and the planet carrier and the pedal rod on the same side form an angle of 180°, the two pedal rods are fixedly connected with the planet gears on the same side, respectively.

[0017] By adopting the above technical scheme, when the length direction of the planet carrier is horizontal and the planet carrier and the pedal rod on the same side form an angle of 180°, the two pedal rods are fixedly connected with the planet gears on the same side, respectively, so that the movement track of the pedal plate is an ellipse and the direction of the ellipse is horizontal, thereby making the movement track of the pedal plate an elliptical track simulating natural gait, and also making the two pedal rods form an angle of 180°, thereby realizing the symmetrical movement of the two pedal plates and helping to enhance the coordination and stability of lower limb movement.

[0018] Optionally, the resistance turning mechanism further comprises a first pulley connected with the planet carrier, a second pulley connected with the frame, a belt connecting the first pulley and the second pulley, and a resistance wheel coaxially arranged on the second pulley.

[0019] By adopting the above technical scheme, the two feet drive the pedal rod to rotate, the planet gears revolve around the inner ring gear, the planet gears drive the planet carrier and the first pulley to rotate together, the second pulley and the resistance wheel rotate together under the transmission of the belt, and the resistance wheel can increase the resistance of rotation, thereby improving the exercise of leg muscles and improving the fat burning effect.

[0020] Optionally, the resistance turning mechanism further comprises a resistance adjusting assembly, the resistance adjusting assembly comprises an adjusting screw threadedly connected with the frame, and a friction member slidingly arranged on the frame and located between the adjusting screw and the resistance wheel, and the contact pressure of the friction member and the resistance wheel is changed by rotating the adjusting screw.

[0021] By adopting the above technical scheme, the pressing force of the friction member on the resistance wheel is adjusted by the adjusting screw, the friction resistance between the friction member and the resistance wheel is adjusted, and the movement intensity is adjusted to meet the needs of users with different physical qualities.

[0022] Optionally, the frame comprises a machine body, a base arranged at the bottom of the machine body, a handrail at the front end of the machine body and a stand seat away from the handrail, the machine body is provided with a sliding groove, the friction member is slidingly installed at one end of the sliding groove close to the resistance wheel, one end of the sliding groove away from the resistance wheel is provided with an adjusting screw hole, the adjusting screw passes through the adjusting screw hole and abuts against the friction member.

[0023] By adopting the technical scheme, the planetary gear mechanism is installed on the machine body through the frame, the base is arranged at the bottom of the machine body to improve the stability during movement, the handrails and the frame seat are arranged to help the human body keep balance during movement, the sliding groove and the adjusting screw hole are arranged on the machine body to facilitate installation of the adjusting screw rod and the friction member, so that the resistance of the resistance wheel is adjusted, and proper exercise of the leg muscles of the user is facilitated.

[0024] Optionally, the modulus of the planetary gear and the inner ring gear is the same, and the tooth number ratio of the inner ring gear and the planetary gear is 2:1.

[0025] By adopting the technical scheme, the modulus of the planetary gear and the inner ring gear is the same, and the tooth number ratio of the inner ring gear and the planetary gear is 2:1.

[0026] In summary, the present application has at least one of the following beneficial technical effects:

[0027] 1. The planetary gear revolves around the inner ring gear, so that the movement track of the pedal plate on the pedal rod connected with the planetary gear is an elliptical track simulating natural gait, the participation of the lower limb muscle group is improved, and the efficient fat burning during lower limb movement is improved.

[0028] 2. The length of the pedal rod can be adjusted by the length adjusting assembly, the elliptical movement track of the pedal plate can be changed to adapt to the needs of users with different leg lengths, and the applicability of the product is improved.

[0029] 3. The guide groove is an arc-shaped groove provided with a friction-reducing coating, which helps to reduce noise generated during movement, and the curvature radius of the arc-shaped groove matches the revolution track of the planetary gear, which helps to improve the stability of the movement of the planetary gear.

[0030] 4. The pressing force of the friction member on the resistance wheel is adjusted by the adjusting screw rod, the friction resistance between the friction member and the resistance wheel is adjusted, and the movement intensity is adjusted to meet the needs of users with different physical conditions. BRIEF DESCRIPTION OF DRAWINGS

[0031] Figure 1 A structure schematic view of a pedal device for lower limb exercise disclosed in the present application.

[0032] Figure 2 A structure schematic view of a planetary gear mechanism disclosed in the present application.

[0033] Figure 3 A front view of the planetary gear mechanism disclosed in the present application.

[0034] Figure 4 A structure schematic view of a pedal device for lower limb exercise disclosed in the present application.Figure 3 Sectional view along line A-A.

[0035] Figure 5 A side view of a footrest device for lower limb exercise disclosed in the present application.

[0036] Figure 6 A side view of a footrest device for lower limb exercise disclosed in the present application. Figure 5 Enlarged view of position I.

[0037] Figure 7 A side view of a footrest device for lower limb exercise disclosed in the present application. Figure 5 Sectional view along line B-B.

[0038] BRIEF DESCRIPTION OF DRAWINGS

[0039] 1, frame; 11, body; 111, sliding groove; 112, adjusting screw hole; 12, base; 13, armrest; 14, bracket; 2, planetary gear mechanism; 21, guide frame; 211, guide groove; 22, inner ring gear; 23, center shaft; 24, planetary gear assembly; 241, planetary gear; 242, planetary gear carrier; 2421, planetary gear shaft; 243, rolling element; 3, footrest assembly; 31, footrest rod; 311, guide hole; 312, threaded hole; 32, footrest plate; 4, length adjusting assembly; 41, length adjusting member; 411, guide rod; 412, via hole; 42, fastener; 43, fixed shaft; 5, resistance turning mechanism; 51, first pulley; 52, second pulley; 53, belt; 54, resistance wheel; 55, resistance adjusting assembly; 551, adjusting screw; 552, friction element. DETAILED DESCRIPTION

[0040] The following description will be made in conjunction with Figures 1 to 7 The present application is further described in detail.

[0041] The embodiments of the present application disclose a footrest device for lower limb exercise.

[0042] A footrest device for lower limb exercise. Referring to Figure 1 and Figure 2, including a rack 1, a planetary gear mechanism 2 and two pedal assemblies 3, the planetary gear mechanism 2 is installed on a body 11 of the rack 1, the two pedal assemblies 3 are connected with two ends of the planetary gear mechanism 2 respectively, the planetary gear mechanism 2 includes a guide frame 21, two inner toothed rings 22, a central shaft 23 and two planetary wheel assemblies 24, the guide frame 21 is fixed on the body 11, the two inner toothed rings 22 are fixedly installed at two ends of the guide frame 21 respectively, the central shaft 23 is rotationally arranged in the guide frame 21, the two planetary wheel assemblies 24 are installed at two ends of the central shaft 23 respectively, the planetary wheel assembly 24 includes a planetary gear 241 meshing with the inner toothed ring 22, the pedal assembly 3 includes a pedal rod 31 and a pedal plate 32, the pedal rod 31 is connected with the planetary gear 241, and a movement track of the pedal plate 32 is an ellipse; the pedal rod 31 is connected with the planetary gear 241, the pedal plate 32 rotates the pedal rod 31 to drive the planetary gear 241 to revolve in the inner toothed ring 22, so that the movement track of the pedal plate 32 is an elliptical track simulating a natural gait, and the user's feet can realize an elliptical movement track in the lower limb exercise process, compared with a traditional circular track exercise bike, the participation of lower limb muscle groups is improved, and the efficiency of lower limb exercise is improved.

[0043] With reference to Figure 3 and Figure 4 The planetary wheel assembly 24 further includes a planetary wheel frame 242, the planetary wheel frame 242 is fixedly connected with the central shaft 23, one end of the planetary wheel frame 242 is provided with a planetary wheel shaft 2421, a rolling part 243 is rotationally arranged on the planetary wheel shaft 2421, the rolling part 243 can be a bearing or a roller rotationally arranged on the planetary wheel shaft 2421, the guide frame 21 is provided with a guide groove 211 for guiding the rolling part 243, and the planetary wheel shaft 2421 rotationally installs the planetary gear 241 at an end away from the planetary wheel frame 242; the rotation of the planetary wheel frames 242 at two ends is coordinated through the central shaft 23, which is helpful for the coordination of the force applied by the two feet to the pedal plate 32, the planetary gear 241 and the rolling part 243 are connected on the planetary wheel shaft 2421, the rolling part 243 is guided and rolled in the guide groove 211 of the guide frame 21, the stability of the revolution movement of the planetary gear 241 is improved, the planetary gears 241 at two sides are symmetrically arranged relative to the central shaft 23, which is helpful for the symmetrical arrangement of the pedal rods at two sides, and thus the coordination and stability of the force applied by the two feet to the pedal plate 32 are improved, and the risk of muscle injury during exercise is reduced.

[0044] With reference to Figure 4 The guide groove 211 is an arc-shaped groove, a friction-reducing coating is arranged in the arc-shaped groove, and the curvature radius of the arc-shaped groove matches the revolution track of the planetary gear 241; the guide groove 211 is an arc-shaped groove and is provided with a friction-reducing coating, the friction-reducing coating in the present application is polytetrafluoroethylene, which is helpful for reducing the noise generated during exercise, and the curvature radius of the arc-shaped groove matches the revolution track of the planetary gear 241, which is helpful for improving the stability of the movement of the planetary gear 241.

[0045] With reference to Figure 1 , Figure 5 and Figure 6 , the length adjusting assembly 4 is arranged between the footrest rod 31 and the footrest plate 32, and is used for adjusting the length of the footrest rod 31. The length adjusting assembly 4 comprises a length adjusting piece 41 and a fastener 42. The length adjusting piece 41 is provided with a guide rod 411. The footrest rod 31 is provided with a guide hole 311 matched with the guide rod 411. The footrest rod 31 is further provided with a plurality of threaded holes 312 arranged along the length direction. The length adjusting piece 41 is provided with a through hole 412 matched with the threaded hole 312. The fastener 42 penetrates through the through hole 412 and is threadedly connected with the threaded hole 312. The footrest rod 31 can change the elliptical movement track of the footrest plate 32 through the adjustment of the length adjusting assembly 4, so as to adapt to the needs of users with different leg lengths, and improve the applicability of the product.

[0046] With reference to Figure 1 and Figure 6 , the length adjusting piece 41 is further provided with a fixed shaft 43. The footrest plate 32 is rotationally arranged on the fixed shaft 43. The length adjusting piece 41 is provided with the fixed shaft 43. The footrest plate 32 is rotationally arranged on the fixed shaft 43. This helps to realize the adjustable movement track, and at the same time, meets the needs of the installation of the footrest plate 32. When the length direction of the planet carrier 242 is in the horizontal direction, and the planet carrier 242 and the same side footrest rod 31 form an angle of 180°, the two footrest rods 31 are respectively fixedly connected with the same side planet gears 241. This can make the movement track of the footrest plate 32 be an ellipse, and the direction of the ellipse be the horizontal direction. At the same time, the angle between the two footrest rods 31 is also 180°. The symmetric footrest design between the two footrest rods 31 with an angle of 180° helps to realize the symmetric movement of the two footrest plates 32, and helps to enhance the coordination and stability of the lower limb movement.

[0047] With reference to Figure 7 , the footrest device further comprises a resistance rotating mechanism 5. The resistance rotating mechanism 5 comprises a first pulley 51 connected with the planet carrier 242, a second pulley 52 connected with the frame 1, a belt 53 connecting the first pulley 51 and the second pulley 52, and a resistance wheel 54 coaxially arranged on the second pulley 52. The double-foot force footrest plate 32 drives the footrest rod 31 to rotate, drives the planet gears 241 to revolve around the inner race 22, and drives the planet carrier 242 and the first pulley 51 to rotate together. Under the transmission of the belt 53, the second pulley 52 and the resistance wheel 54 rotate together. The resistance wheel 54 can increase the resistance of rotation, so as to improve the exercise of the leg muscles and improve the fat burning effect.

[0048] With reference to Figure 5The resistance adjusting assembly 55 comprises an adjusting screw rod 551 screwed with the rack 1, a friction piece 552 slidingly arranged on the rack 1 and located between the adjusting screw rod 551 and the resistance wheel 54, and the contact pressure of the friction piece 552 with the resistance wheel 54 is changed by rotating the adjusting screw rod 551. The friction piece 552 is pressed against the resistance wheel 54 by the adjusting screw rod 551, and the friction piece 552 can be made of polyurethane material or wear-resistant rubber. A steel pressing plate can be arranged on the side of the friction piece 552 close to the adjusting screw rod 551, so that the adjusting screw rod can press the friction piece 552 and adjust the friction resistance between the friction piece 552 and the resistance wheel 54, thereby adjusting the movement strength to meet the needs of users with different physical qualities.

[0049] With reference to Figure 7 The rack 1 comprises a body 11, a base 12 arranged at the bottom of the body 11, a handrail 13 arranged at the front end of the body 11 and a rack seat 14 arranged at the end away from the handrail 13. The body 11 is provided with a sliding groove 111, and the friction piece 552 is slidingly arranged at one end of the sliding groove 111 close to the resistance wheel 54. The other end of the sliding groove 111 away from the resistance wheel 54 is provided with an adjusting screw hole 112, and the adjusting screw rod 551 passes through the adjusting screw hole 112 and abuts against the friction piece 552. The planetary gear mechanism 2 is arranged on the rack 1 through the body 11. The base 12 arranged at the bottom of the body 11 improves the stability during movement. The arrangement of the handrail 13 and the rack seat 14 helps to keep the body balanced during movement. The sliding groove 111 and the adjusting screw hole 112 arranged on the body 11 facilitate the installation of the adjusting screw rod 551 and the friction piece 552, thereby facilitating the adjustment of the resistance of the resistance wheel 54 and helping the user to properly exercise the leg muscles.

[0050] With reference to Figure 3 The modulus of the planetary gear 241 is the same as that of the inner ring gear 22, and the tooth number ratio of the inner ring gear 22 to the planetary gear 241 is 2:1. The modulus of the planetary gear 241 is the same as that of the inner ring gear 22, which facilitates the meshing transmission between the planetary gear 241 and the inner ring gear 22. The tooth number ratio of the inner ring gear 22 to the planetary gear 241 is 2:1, which helps the planetary gear 241 to rotate 2 revolutions and revolve 1 revolution when it revolves around the inner ring gear 22, so that the movement track of the pedal plate 32 on the pedal rod 31 connected with the planetary gear 241 is an elliptical track simulating natural gait.

[0051] The working process of the footrest device for lower limb exercise is as follows: the user applies force to the footrest 32, under the action of the force, the planetary gear 241 revolves around the center of the inner ring gear 22 while rotating, the footrest rod 31 is fixedly connected with the planetary gear 241, in the rotating process of the planetary gear 241, the movement track of the footrest 32 at the end of the footrest rod 31 is an ellipse, the size of the ellipse can be adjusted by adjusting the relative position between the length adjusting part 41 and the footrest rod 31, thereby lengthening the length of the footrest rod 31 and fixing the lengthened footrest rod 31 by the fastener 42, the revolution of the planetary gear 241 drives the planetary carrier 242 to rotate around the central shaft 23, the first pulley 51 is coaxially fixedly connected with the planetary carrier 242, so that the first pulley 51 rotates together with the planetary carrier 242, under the transmission of the belt 53, the second pulley 52 rotates and drives the resistance wheel 54 to rotate, the rotating adjusting screw rod 551 is used to adjust the pressing force of the friction part 552 on the resistance wheel 54, so as to increase or reduce the friction resistance of the resistance wheel 54, so as to adapt to the needs of different users for exercise.

[0052] The above are preferred embodiments of the present application, and do not limit the protection scope of the present application in sequence, so that: equivalent changes made according to the structure, shape, principle of the present application should be covered in the protection scope of the present application.

Claims

1. A footrest device for lower limb exercise, characterised in that: The utility model provides a kind of pedal device, including rack (1), planetary gear mechanism (2) being mounted on the rack (1), and two foot pedal assemblies (3) being connected with the both ends of the planetary gear mechanism (2) respectively, the planetary gear mechanism (2) includes guide frame (21) being fixed to the rack (1), inner ring gear (22) being fixedly connected with the both ends of the guide frame (21), center shaft (23) being rotationally arranged in the guide frame (21), and planetary gear assembly (24) being connected with the both ends of the center shaft (23) respectively, the planetary gear assembly (24) includes planetary gear (241) being engaged with the inner ring gear (22), the foot pedal assembly (3) includes foot pedal lever (31) and foot pedal (32), the foot pedal lever (31) is connected with the planetary gear (241);The motion track of the foot pedal (32) is ellipse, and the long axis direction of ellipse is horizontal direction.

2. A foot rest device for lower body exercise as claimed in claim 1 wherein: The planetary gear assembly (24) further includes planetary gear carrier (242), the planetary gear carrier (242) is fixedly connected with the center shaft (23), one end of the planetary gear carrier (242) is provided with planetary gear shaft (2421), the planetary gear shaft (2421) is rotationally provided with rolling element (243), the guide frame (21) is provided with guide groove (211) for guiding the rolling element (243), the planetary gear shaft (2421) is rotationally installed the planetary gear (241) at the end away from the planetary gear carrier (242), and the planetary gear (241) on both sides is symmetrically arranged relative to the center shaft (23).

3. A footrest device for lower body exercise according to claim 2, characterized in that: The guide groove (211) is arc-shaped groove, the arc-shaped groove is provided with antifriction coating, and the curvature radius of the arc-shaped groove matches the orbit track of the planetary gear (241).

4. A foot rest device for lower body exercise as claimed in claim 3 wherein: Length adjusting assembly (4) for adjusting the length of the foot pedal lever (31) is further provided between the foot pedal lever (31) and the foot pedal (32), the length adjusting assembly (4) includes length adjusting member (41) and fastener (42), the length adjusting member (41) is provided with guide rod (411), the foot pedal lever (31) is provided with guide hole (311) matched with the guide rod (411), and the foot pedal lever (31) is further provided with a plurality of screw holes (312) arranged along the length direction, the length adjusting member (41) is provided with via hole (412) matched with the screw hole (312), and the fastener (42) penetrates the via hole (412) and is threadedly connected with the screw hole (312).

5. A footrest device for lower body exercise according to claim 4, characterized in that: The length adjusting member (41) is further provided with fixed shaft (43), and the foot pedal (32) is rotationally arranged on the fixed shaft (43).

6. A foot rest device for lower body exercise as claimed in claim 5 wherein: When the length direction of the planetary gear carrier is horizontal, and the planetary gear carrier and the foot pedal lever on the same side form an angle of 180°, the two foot pedal levers (31) are fixedly connected with the planetary gears (241) on the same side respectively.

7. A footrest device for lower body exercise according to claim 6, characterized in that: The resistance turning mechanism (5) further comprises a resistance adjusting assembly (55), the resistance adjusting assembly (55) comprises an adjusting screw rod (551) threadedly connected with the rack (1), and a friction piece (552) slidingly arranged on the rack (1) and located between the adjusting screw rod (551) and the resistance wheel (54), and the contact pressure of the friction piece (552) and the resistance wheel (54) is changed by rotating the adjusting screw rod (551).

8. A footrest device for lower body exercise according to claim 7, characterized in that: The rack (1) comprises a machine body (11), a base (12) arranged at the bottom of the machine body (11), a handrail (13) at the front end of the machine body (11) and a rack seat (14) away from one end of the handrail (13), the machine body (11) is provided with a sliding groove (111), the friction piece (552) is slidingly installed at one end of the sliding groove (111) close to the resistance wheel (54), and one end of the sliding groove (111) away from the resistance wheel (54) is provided with an adjusting screw hole (112), the adjusting screw rod (551) passes through the adjusting screw hole (112) and abuts against the friction piece (552).

9. A footrest device for lower body exercise according to claim 8, characterized in that:

10. The foot pedal device for lower limb exercise according to claim 9, wherein the modulus of the planetary gear (241) is the same as that of the inner gear ring (22), and the tooth number ratio of the inner gear ring (22) to the planetary gear (241) is 2:

1. ​

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