Recumbent exercise bike with an elliptical track

Abstract

A recumbent exercise bike with an elliptical track, comprising a frame (1), a seat (2) at the rear of the frame (1) and a resistance assembly at the front, the resistance component comprising: a wheel (4) connected to a crank (8) on the left and right sides; pivot levers (5) rotatably connected to the left and right sides of the frame (1), the lower end of the pivot lever (5) being pivotally connected to a pedal mechanism (3) comprising a pedal tube (31) pivotally connected to the pivot lever (5) and a pedal (32) mounted on the pedal tube (31); and a coupling mechanism connected between the crank (8) and the pedal mechanism and converting the circular movement of the crank into the elliptical movement of the pedal (4).

Description

Field of the invention

[0001] The invention relates to the technical field of fitness equipment, in particular a recumbent exercise bike with an elliptical track. State of the art

[0002] Current recumbent exercise bikes generally adopt a fixed crank rotation structure, which has the following shortcomings: 1. Limited range of motion: The pedals only perform circular movements, and the range of motion of the leg joints is small, which affects the exercise effect; 2. Large space required for a long stride length: The pedals make a single circular movement. To increase the stride length, the crank must be lengthened, which increases the size of the crank disc and the entire device, which is not suitable for use in small spaces; and 3. Uneven force: With the traditional crank structure, power interruptions often occur at the top and bottom dead points, resulting in intermittent pedaling. Object of the invention

[0003] To overcome the deficiencies of the prior art, the invention provides a recumbent exercise bike with a simple construction and an elliptical track, which can increase the stride length during pedaling without increasing the crank length.

[0004] The invention is realized by the following technical solution: A recumbent exercise bike with an elliptical track, comprising a frame, a seat on the rear of the frame and a resistance arrangement on the front, wherein the resistance component comprises: a wheel connected to a crank on each of the left and right sides; pivot levers pivotally connected to the left and right sides of the frame, the lower end of the pivot lever being pivotally connected to a pedal mechanism comprising a pedal tube pivotally connected to the pedal lever and a pedal attached to the pedal tube; and a coupling mechanism connected between the crank and the pedal mechanism that converts the circular movement of the crank into the elliptical movement of the pedal.

[0005] During use, the user sits on the seat and pedals with both feet, causing the crank to move in a circular motion. The crank moves the pivot lever along with it in this circular motion. At the same time, the coupling mechanism also restricts the pedal's trajectory, limiting it to an elliptical path.

[0006] This invention uses a linkage mechanism to convert the pedal trajectory into an elliptical trajectory, thereby increasing the step length when pedaling without increasing the crank length and achieving a simple structure.

[0007] Preferably, the coupling mechanism comprises a roller and a coupling rod, wherein one end of the coupling rod is pivotally connected to the crank, wherein the other end of the coupling rod is pivotally connected to the pivot lever, wherein the treadle mechanism is coupled to the crank via the roller, and wherein, when the crank is rotated, the treadle mechanism can slide linearly through the roller.

[0008] When the crank rotates, the coupling rod is moved along with it. The coupling rod converts the rotary motion of the crank into the periodic pivoting motion of the pivot lever. The pedal mechanism glides linearly, forming a combined elliptical trajectory of "circular motion + linear reciprocating motion."

[0009] Preferably, a drive shaft is provided at the end of the crank, wherein one end of the roller and one end of the coupling rod are both mounted on the drive shaft and rotatably connected to the drive shaft, wherein the tread tube is supported on the roller, and wherein, when the crank is rotated, the tread tube can slide linearly on the roller.

[0010] The rotating connection between the pulley and the coupling rod and the crank is realized via the drive shaft. The pedal mechanism is coupled to the crank via the pulley, with the pedal tube supported directly on the pulley.

[0011] Preferably, a drive shaft is provided at the end of the crank, one end of the coupling rod being mounted on the drive shaft and being rotatably connected to the drive shaft, the roller being rotatably mounted on one side of the treadle tube, the pedal being located on the other side of the treadle tube, the roller being rollably supported on the coupling rod, and when the crank is rotated, the roller rolls on the coupling rod so that the treadle mechanism slides linearly.

[0012] The coupling rod and the crank are rotatably connected by a drive shaft. The pedal mechanism and the crank are coupled by the roller being rotatably attached to the pedal tube, and the roller being rotatably supported on the coupling rod.

[0013] Preferably, the pedal and the roller are arranged coaxially, wherein the pedal is rotatably connected to the treadle, wherein the treadle is provided with a rotation axis passing through two sides of the treadle, and wherein the pedal and the roller are both mounted on the rotation axis.

[0014] The pedal can also be rotated to improve pedaling freedom and provide the user with a better point of force. The same pivot axis is used for the rotation of the pedal and the roller, making this structure more compact.

[0015] Preferably, a drive shaft is provided at the end of the crank, wherein one end of the coupling rod is mounted on the drive shaft and is rotatably connected to the drive shaft, wherein the coupling rod is located below the treadle tube, wherein the roller is arranged between the treadle tube and the coupling rod, and wherein, when the treadle tube is moved, the coupling rod is moved synchronously via the roller.

[0016] The coupling rod and the crank are rotatably connected by a drive shaft. The treadle mechanism and the crank are coupled by the roller being rotatably mounted on the treadle tube, and the roller being rotatably supported on the coupling rod. A roller seat can be provided on the underside of the treadle tube, so that the roller is rotatably mounted on the underside of the treadle tube, or the roller seat can be arranged on the connecting rod, so that the roller is rotatably mounted on the connecting rod.

[0017] Preferably, a limiting structure is provided between the roller and the tread tube, which consists of: an annular groove on the outer peripheral wall of the roller, with the inner wall of which the outer wall of the tread tube is in contact; or a U-shaped groove or a V-shaped groove extending along the length direction of the tread tube, wherein the outer peripheral wall of the roller is in contact with the inner wall of the U-shaped groove or the V-shaped groove.

[0018] The limiting structure prevents the foot tube from swaying left and right while sliding to increase stability.

[0019] Preferably, a limiting structure is provided between the roller and the coupling rod, which consists of: an annular groove on the outer peripheral wall of the roller, with the inner wall of which the outer wall of the coupling rod is in contact; or a U-shaped groove or a V-shaped groove extending along the length direction of the coupling rod, wherein the outer peripheral wall of the roller is in contact with the inner wall of the U-shaped groove or the V-shaped groove.

[0020] The limiting structure prevents the foot tube from swaying left and right while sliding to increase stability.

[0021] Preferably, a handle is provided at the upper end of the pivot lever, which moves over the pivot lever together with the pedal.

[0022] The user can grip the handles to increase safety.

[0023] Preferably, a position adjustment mechanism is provided between the seat and the frame, wherein the position adjustment mechanism can adjust the front and rear position as well as the height position of the seat.

[0024] The seat can be adjusted using the position adjustment mechanism, making it suitable for people of different heights.

[0025] Compared to the prior art, the invention has a simpler structure and an elliptical pedal trajectory. The stride length during pedaling can be increased without increasing the crank length, allowing the leg joints to have a wider range of motion and improving the training effect. The elliptical pedal trajectory makes the user's power more even and pedaling more continuous. Short description of the drawings Fig. 1 a schematic representation of the structure of the invention, Fig. 2 a representation of the pedal being pressed to the bottom point, Fig. 3 a representation from a different viewing direction according to Fig. 1, Fig. 4 a sectional view of the connection point of the roller, the coupling rod and the crank.

[0026] Reference symbols: 1 frame, 2 seat, 21 position adjustment mechanism, 3 treadle mechanism, 31 treadle tube, 32 pedal, 4 wheel, 5 pivot lever, 51 handle, 6 coupling rod, 7 roller, 71 annular groove, 8 crank, 9 drive shaft Description of the preferred embodiments

[0027] The invention is described in more detail below with reference to the accompanying drawings and specific embodiments. Embodiment 1

[0028] As in the Fig.As shown in Figures 1 to 4, Embodiment 1 provides a recumbent exercise bike with an elliptical track, including a frame 1, a seat 2 on the rear of the frame 1, and a position adjustment mechanism 21 between the seat 2 and the frame 1. The position adjustment mechanism 21 is any mechanism used in any existing exercise bike and can adjust the front and rear positions and the height position of the seat 2.

[0029] A resistance assembly is provided on the front of frame 1, and a control panel is provided at the top of the front. The resistance assembly includes a wheel 4. Wheel 4 is equipped with a magnetically controlled resistance system. The user can adjust the resistance coefficient of wheel 4 via the control panel. The left and right sides of wheel 4 are each connected to a crank 8. The end of crank 8 is rotatably connected to a coupling rod 6 and a roller 7 via a drive shaft 9. Roller 7 is located on the outside of coupling rod 6. Both are mounted on drive shaft 9.

[0030] The resistance assembly further includes pivot levers 5 pivotally connected to the left and right sides of the frame 1. The lower end of the pivot lever 5 is pivotally connected to a pedal mechanism 3, which includes a treadle 31 extending in the forward and backward direction of the frame 1 and a pedal 32 fixedly mounted on the treadle 31. The cross-section of the treadle 31 is elliptical or circular. The treadle 31 is supported on the roller 7. The outer peripheral wall of the roller 7 is provided with an annular groove 71. The outer wall of the treadle 31 is in contact with the inner wall of the annular groove 71. A handle 51 is provided at the upper end of the pivot lever 5 and moves along with the pedal 32 via the pivot lever.

[0031] The other end of the coupling rod 6 is pivotally connected to the pivot lever 5. When the crank 8 performs a circular movement, the crank 8 moves the coupling rod 6. The coupling rod 6 causes the pivot lever 5 to pivot. The pivoting of the pivot lever 5 allows the pedal mechanism 3 to move. The pedal tube 31 slides linearly on the roller 7. It is always supported on the roller 7 and performs a circular movement with the roller 7, so that the pedal 32 moves in a combined elliptical path. Embodiment 2

[0032] The difference between Embodiment 2 and Embodiment 1 is that the roller 7 in Embodiment 2 is not provided with the groove 71. A U-shaped groove or a V-shaped groove (not shown) extending along the length direction of the tread tube 31 is provided on the bottom surface of the tread tube 31. The outer peripheral wall of the roller 7 contacts the inner wall of the U-shaped groove or the V-shaped groove. Embodiment 3

[0033] The difference between Embodiment 3 and Embodiment 1 is that the roller 7 is not mounted on the drive shaft 9. The roller 7 is rotatably mounted on the inside of the treadle tube 31 and rollably supported on the coupling rod 6. The pedal 32 is rotatably mounted on the outside of the treadle tube 31. The roller 7 and the pedal 32 are arranged coaxially. The treadle tube 31 is provided with a rotation axis passing through two sides of the treadle tube 31. The pedal 32 and the roller 7 are both mounted on the rotation axis (not shown). Embodiment 4

[0034] The difference between Embodiment 4 and Embodiment 1 is that the roller 7 is not mounted on the drive shaft 9. The coupling rod 6 is located below the tread tube 31. A roller seat is provided below the tread tube 31. The roller 7 is mounted on the roller seat, so that the roller 7 is rotatably attached to the underside of the tread tube 31. The roller 7 is supported on the coupling rod 6 (not shown) in a rollable manner. Embodiment 5

[0035] The difference between Embodiment 5 and Embodiment 3 or Embodiment 4 is that the coupling rod 6 is provided with a U-shaped groove or a V-shaped groove extending along its length direction, and the roller 7 is not provided with the groove 71. The outer peripheral wall of the roller 7 is in contact with the inner wall of the U-shaped groove or the V-shaped groove. Embodiment 6

[0036] The difference between Embodiment 6 and Embodiment 4 is that the roller seat is arranged on top of the coupling rod 6, so that the roller 7 is rotatably mounted on the top of the coupling rod 6. The pedal tube 31 is supported on the roller 7.

Claims

[1] A recumbent exercise bike with an elliptical track, comprising a frame (1), a seat (2) at the rear of the frame (1) and a resistance assembly at the front, the resistance component comprising: a wheel (4) connected to a crank (8) on the left and right sides; pivot levers (5) rotatably connected to the left and right sides of the frame (1), the lower end of the pivot lever (5) being pivotally connected to a pedal mechanism (3) comprising a pedal tube (31) pivotally connected to the pivot lever (5) and a pedal (32) mounted on the pedal tube (31); and a coupling mechanism connected between the crank (8) and the pedal mechanism and converting the circular movement of the crank into the elliptical movement of the pedal (4). [2] Recumbent exercise bike with an elliptical track according to claim 1, characterized bythat the coupling mechanism comprises a roller (7) and a coupling rod (6), wherein one end of the coupling rod 6 is pivotally connected to the crank (8), wherein the other end of the coupling rod is pivotally connected to the pivot lever (5), wherein the treadle mechanism is coupled to the crank (8) via the roller (7), and wherein, when the crank (8) is rotated, the treadle mechanism can slide linearly through the roller (7). [3] Recumbent exercise bike with an elliptical track according to claim 2, characterized by that a drive shaft (9) is provided at the end of the crank (8), wherein one end of the roller (7) and one end of the coupling rod (6) are both mounted on the drive shaft (9) and are rotatably connected to the drive shaft (9), wherein the tread tube (31) is supported on the roller (7), and wherein, when the crank (8) is rotated, the tread tube can slide linearly on the roller (7). [4] Recumbent exercise bike with an elliptical track according to claim 2, characterized bythat a drive shaft (9) is provided at the end of the crank (8), wherein one end of the coupling rod (6) is mounted on the drive shaft (9) and is rotatably connected to the drive shaft (9), wherein the roller (7) is rotatably attached to one side of the treadle tube (31), wherein the pedal (32) is located on the other side of the treadle tube (31), wherein the roller (7) is supported on the coupling rod (6) in a rollable manner, and wherein, when the crank (8) is rotated, the roller (7) rolls on the coupling rod (6) so that the treadle mechanism slides linearly. [5] Recumbent exercise bike with an elliptical track according to claim 4, characterized by that the pedal (32) and the roller (7) are arranged coaxially, wherein the pedal (32) is rotatably connected to the treadle (31), wherein the treadle (31) is provided with an axis of rotation which runs through two sides of the treadle (31), and wherein the pedal (32) and the roller (7) are both mounted on the axis of rotation. [6] Recumbent exercise bike with an elliptical track according to claim 2, characterized by that a drive shaft (9) is provided at the end of the crank (8), wherein one end of the coupling rod (6) is mounted on the drive shaft (9) and is rotatably connected to the drive shaft (9), wherein the coupling rod (6) is located below the tread tube (31), wherein the roller (7) is arranged between the tread tube (31) and the coupling rod (6), and wherein, when the tread tube (31) is moved, the coupling rod (6) is moved synchronously via the roller (7). [7] Recumbent exercise bike with an elliptical track according to claim 3, characterized by that a limiting structure is provided between the roller (7) and the tread tube (31), which consists of: an annular groove (71) on the outer peripheral wall of the roller (7), with the inner wall of which the outer wall of the tread tube (31) is in contact; or a U-shaped groove or a V-shaped groove extending along the length direction of the tread tube (31), wherein the outer peripheral wall of the roller (7) is in contact with the inner wall of the U-shaped groove or the V-shaped groove. [8] A recumbent exercise bike with an elliptical track according to claim 4 or 5 or 6, characterized by that a limiting structure is provided between the roller (7) and the coupling rod (6), which consists of: an annular groove (71) on the outer peripheral wall of the roller (7), with the inner wall of which the outer wall of the coupling rod (6) is in contact; or a U-shaped groove or a V-shaped groove extending along the length direction of the coupling rod (6), wherein the outer peripheral wall of the roller (7) is in contact with the inner wall of the U-shaped groove or the V-shaped groove. [9] Recumbent exercise bike with an elliptical track according to one of claims 1 to 6, characterized bythat a handle (51) is provided at the upper end of the pivot lever (5), which moves over the pivot lever together with the pedal (32). [10] Recumbent exercise bike with an elliptical track according to one of claims 1 to 6, characterized by that a position adjustment mechanism (21) is provided between the seat (2) and the frame (1), wherein the position adjustment mechanism (21) can adjust the front and rear position as well as the height position of the seat (2).

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