A step mountain climbing exercise vehicle

Abstract

This invention discloses a stepping mountain climbing exercise bike, comprising a main frame, a power assembly, a crank rotating shaft, rollers, a rocker arm assembly, a support tube assembly, a pedal fixing seat, and pedals. The power assembly is rotatably mounted on the main frame; the crank rotating shaft is driven by the power assembly and is eccentrically positioned; the rollers are fixed to the crank rotating shaft; one end of the rocker arm assembly is connected to the main frame and drives the rollers; one end of the support tube assembly is connected to the main frame; the upper and lower ends of the pedal fixing seat are rotatably connected to the rocker arm assembly and the support tube assembly, respectively; the pedals are fixed to the upper surface of the pedal fixing seat. This invention uses the rocker arm assembly and the support tube assembly to jointly constrain the pedal fixing seat, forming a double rocker mechanism. This transforms the circular motion of the power assembly into the approximately linear reciprocating motion of the pedals, simulating the action of climbing stairs, reducing unnatural stress on the knee joint, and improving exercise comfort and safety.

Description

Technical fields: This invention relates to the field of fitness equipment technology, specifically to a step-climbing exercise bike that can simulate the action of climbing stairs or steps. Background technology: Existing exercise bikes typically include a main frame, a drive train mounted rotatably on the main frame, cranks mounted on the drive train, and foot pedals mounted on the cranks. When in use, the user steps on the foot pedals, which then move in a circular motion with the cranks.

[0001] However, in actual use, users found that the foot pedals of the aforementioned exercise bike move in a closed circle, forcing their feet to continuously draw circles. Some users reported knee discomfort after use. Furthermore, when users wished to simulate the effects of outdoor hiking or stair climbing, the exercise bike failed to provide the corresponding foot movement sensation. Summary of the Invention: The purpose of this invention is to provide a step-climbing exercise bike to change the way existing exercise bikes move in a circular motion using foot pedals.

[0002] Analysis revealed that existing exercise bikes have rigid connections between the pedals and cranks, resulting in a fixed circular or elliptical motion that forces the feet into unnatural horizontal reciprocating movements. In contrast, when climbing stairs, the human foot primarily moves vertically. This difference causes additional stress on the knee joint, a physical cause of discomfort during exercise. Therefore, the key to this solution is to remove the rigid connection and introduce an independent constraint mechanism, preserving vertical movement while constraining horizontal movement. To achieve the above objectives, the present invention adopts the following technical solution: Option 1: A stepping exercise bike, comprising: Main frame; The power unit is rotatably mounted on the main frame and has a central axis of rotation; The crankshaft is connected to the power assembly for transmission, and the axis of the crankshaft is parallel to and a predetermined distance away from the rotation center axis of the power assembly. The roller is fixedly mounted on the crank shaft. A rocker arm assembly, one end of which is rotatably connected to the main frame, and the rocker arm assembly is engaged with the roller drive; A support tube assembly, one end of which is rotatably connected to the main frame; The upper end of the pedal fixing seat is rotatably connected to the other end of the rocker arm assembly, and the lower end is rotatably connected to the other end of the support tube assembly. The pedal is fixedly installed on the upper surface of the pedal mounting base.

[0003] In Scheme 1, when the power assembly rotates, the crankshaft revolves around the central axis of the power assembly, driving the rollers in circular motion. The rollers push the swing arm assembly to swing, which in turn moves the upper end of the pedal mounting base, while the support tube assembly constrains the lower end of the pedal mounting base. Thus, the upper and lower ends of the pedal mounting base are constrained by two rotatable connecting rods, forming a double rocker mechanism. This mechanism converts the continuous rotational motion of the power assembly into the reciprocating oscillation of the pedal on the pedal mounting base, making the pedal's trajectory an approximately vertical reciprocating straight line. Compared to the circular motion of existing exercise bike pedals, the pedal movement in this scheme is closer to the foot movement of a person climbing stairs or steps, reducing unnatural knee twisting.

[0004] Option 2: Option 2 is based on Option 1, wherein the swing arm assembly is rotatably connected to the main frame via a main frame rotation shaft.

[0005] Option 2 is adopted, which sets an independent main frame rotation axis as the swing fulcrum of the swing arm assembly, making the rotation connection structure of the swing arm assembly simple and reliable, and easy to assemble and maintain.

[0006] Option 3: Option 3 is based on Option 1, wherein the support tube assembly is rotatably connected to the main frame via a main frame fixed U-shaped seat.

[0007] In Scheme 3, the main frame fixed U-shaped seat provides a stable swing fulcrum for the support tube assembly, allowing the support tube assembly to swing freely around the fulcrum, thereby effectively constraining the lower end movement trajectory of the pedal fixing seat.

[0008] Option 4: Option 4 is based on Option 1, and the pedal fixing seat is a pedal U-shaped seat.

[0009] Option 4 is adopted. The U-shaped seat structure can provide installation space for two hinge points at the top and bottom ends respectively. The opening of the U-shaped seat is set upward to facilitate the fixed installation of the pedal. The structure is compact and has high strength.

[0010] Option 5: Option 5 is based on Option 1. The upper end of the pedal fixing seat is rotatably connected to the rocker arm assembly via a rotating shaft 1, and the lower end is rotatably connected to the support tube assembly via a rotating shaft 2.

[0011] Scheme 5 is adopted, with rotating shaft 1 and rotating shaft 2 respectively realizing the hinge between the pedal fixing seat and the rocker arm assembly and the support tube assembly. The two hinge points are arranged in the vertical direction, so that the pedal fixing seat can change its posture according to the constraint of the double rocker arm mechanism during the movement, further simulating the change of foot angle when climbing stairs in reality.

[0012] Option Six: Option 6 is based on Option 1, wherein the roller and the rocker arm assembly are in rolling or sliding contact, and the rocker arm assembly is provided with a contact surface or groove that cooperates with the roller.

[0013] Option 6 is adopted, which uses rolling or sliding contact between the roller and the rocker arm assembly to smoothly transmit the circumferential motion of the crank shaft to the rocker arm assembly, reducing friction and noise and extending service life.

[0014] Option 7: Option 7 is based on Option 1. The power assembly includes a transmission wheel set, which is rotatably mounted on the main frame. It also includes a crank, one end of which is connected to the transmission wheel set, and the crank rotation shaft is fixedly mounted on the other end of the crank.

[0015] Scheme 7 is adopted, in which the transmission wheel set provides a flywheel effect, making the motion smooth and continuous; the crank eccentrically connects the rotation center of the transmission wheel set with the crank rotation shaft, which is simple in structure and easy to manufacture.

[0016] Option 8: Option 8 is based on Option 1, wherein the support tube assembly is a telescopic tube structure with adjustable length.

[0017] With option eight, users can adjust the length of the support tube assembly according to their leg length or desired step length, thereby changing the travel of the pedal reciprocating motion, achieving adjustable step length, and meeting the needs of different exercise intensities.

[0018] Option Nine: Scheme 9 is based on Scheme 4, and an angle adjustment device is provided between the pedal and the pedal U-shaped seat to adjust the tilt angle of the pedal relative to the horizontal plane.

[0019] Option 9, with its angle adjustment device, allows the pedal angle to be personalized according to the user's ankle joint physiological angle, improving exercise comfort and reducing the risk of ankle joint injury.

[0020] Option 10: Scheme 10 is based on Scheme 1. The main frame is equipped with two sets of mechanisms that are symmetrical on the left and right sides, respectively for the left foot stepping movement and the right foot stepping movement. The two sets of mechanisms share the same power component. The swing arm assemblies on the left and right sides are connected to each other through synchronous linkages to realize the alternating movement of the left and right pedals.

[0021] Scheme 10 is adopted, in which the left and right sets of mechanisms share the same power component, resulting in a compact structure; the synchronous linkage enables the left and right pedals to move up and down alternately, simulating the alternating stepping motion of the two feet during real mountain climbing, with a natural and smooth movement rhythm.

[0022] Analysis of the mechanism principle of this invention: The core mechanism of this invention is a planar double rocker mechanism composed of a rocker arm assembly, a support tube assembly, a pedal fixing seat, and a main frame. Specifically: the main frame serves as the machine frame; the rocker arm assembly is the first rocker arm, one end of which is hinged to the main frame via a main frame rotation shaft, and the other end is hinged to the upper end of the pedal fixing seat via a first rotation shaft; the support tube assembly is the second rocker arm, one end of which is hinged to the main frame via a main frame fixing U-shaped seat, and the other end is hinged to the lower end of the pedal fixing seat via a second rotation shaft; the pedal fixing seat serves as a connecting rod.

[0023] The power input consists of a transmission wheel set, a crank, a crank shaft, and rollers. The crank is fixed to an eccentric position on the transmission wheel set. When the transmission wheel set rotates, the crank shaft makes a uniform circular motion around the rotation center axis of the transmission wheel set with a radius equal to the length of the crank. The rollers also make a circular motion, driving the rocker arm assembly to reciprocate around the main frame's rotation axis. The trajectory of the free end of the support tube assembly (rotation shaft two) is originally an arc centered on the main frame's fixed U-shaped seat. However, since the pedal fixing seat is a rigid component, its upper end swings with the rocker arm assembly, and the motion of its lower end must simultaneously satisfy the arc constraint of the support tube assembly and the rigid length constraint of the pedal fixing seat. Therefore, the actual trajectory of rotation shaft two is the result of the combination of the above two constraints, while the trajectory of the pedal fixed on the pedal fixing seat is a planar motion curve of any point on this rigid component.

[0024] By optimizing the design of the overall length of the swing arm, the overall length of the support tube, the vertical distance between the two hinge points, the relative position of the two fixed hinge points, and the crank length, the motion trajectory of any point on the pedal can be made approximately a vertical reciprocating straight line, with its horizontal swing amplitude controlled within a very small range. Because the posture of the pedal fixing seat changes during movement, the tilt angle of the pedal fixed to it will also naturally change with the phase of movement, further simulating the dynamic changes in foot angle during real stair climbing.

[0025] In summary, this invention, by incorporating a rocker arm assembly that cooperates with the roller drive and an independent support tube assembly, allows the rocker arm assembly and support tube assembly to jointly constrain the pedal mounting base, forming a double rocker mechanism. This mechanism transforms the continuous circular motion of the power component into the approximately linear reciprocating motion of the pedal, making the user's foot movements closer to the natural posture of climbing stairs or steps. Simultaneously, by incorporating an adjustable support tube assembly and a pedal angle adjustment device, personalized adjustments to the stride length and pedal angle are achieved. Compared to existing exercise bikes, this invention, while maintaining the smooth drive advantage of the transmission wheel set, fundamentally changes the mode of movement, reduces unnatural stress on the knee joint, and improves the comfort and safety of exercise. Attached image description: The present invention will now be described in detail with reference to the accompanying drawings: Figure 1 This is an exploded structural diagram of the present invention; Figure 2This is a schematic diagram of the combined structure of the present invention; Figure 3 This is a schematic diagram of the action structure of the present invention. Detailed implementation method: To make the technical problems, technical solutions, and beneficial effects of this invention clearer and more understandable, the invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0026] 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 preferred embodiments of the present invention and should not be considered as excluding other embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0027] Unless otherwise expressly defined, the use of terms such as "first," "second," or "third" in the claims, description, and accompanying drawings of this invention is for distinguishing different objects and not for describing a specific order.

[0028] Unless otherwise expressly defined, in the claims, description, and accompanying drawings of this invention, the use of directional terms such as "center," "lateral," "longitudinal," "horizontal," "vertical," "top," "bottom," "inner," "outer," "upper," "lower," "front," "rear," "left," "right," "clockwise," and "counterclockwise" to indicate orientation or positional relationships is based on the orientation and positional relationships shown in the accompanying drawings and is only for the convenience of describing the invention and simplifying the description, and is not intended to indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as limiting the specific scope of protection of this invention.

[0029] Unless otherwise expressly defined, the terms "fixed connection" or "fixed connection" used in the claims, description and drawings of this invention should be interpreted broadly to refer to any connection in which there is no displacement or relative rotation relationship between the two parties, including non-removable fixed connection, detachable fixed connection, integral connection and fixed connection by other means or components.

[0030] In the claims, description and accompanying drawings of this invention, the terms "comprising," "having," and variations thereof are used to mean "including but not limited to."

[0031] like Figure 1-3 The following is a specific embodiment of the present invention: The attached figures are labeled as follows: 1-Main frame; 2-Power assembly; 21-Transmission wheel set; 22-Crank; 3-Crank rotating shaft; 4-Roller; 5-Main frame rotating shaft; 6-Main frame fixed U-shaped seat; 7-Swing arm assembly; 8-Support tube assembly; 9-Pedal fixing seat (pedal U-shaped seat); 10-Rotating shaft one; 11-Rotating shaft two; 12-Pedal.

[0032] Overall Structure like Figure 1 As shown, this embodiment provides a stepping mountain climbing exercise bike, including a main frame 1, a power assembly 2, a crank rotating shaft 3, rollers 4, a swing arm assembly 7, a support tube assembly 8, a pedal fixing seat 9, and pedals 12. The power assembly 2 is rotatably mounted on the main frame 1; the crank rotating shaft 3 is connected to the power assembly 2 and is eccentrically positioned; the rollers 4 are fixed to the crank rotating shaft 3; one end of the swing arm assembly 7 and the support tube assembly 8 are rotatably connected to the main frame 1, and the other ends are rotatably connected to the upper and lower ends of the pedal fixing seat 9, respectively; the pedals 12 are fixed to the upper surface of the pedal fixing seat 9.

[0033] Detailed structure of each component (a) Main frame and power components like Figure 1 As shown, the main frame 1 is a frame structure welded from metal tubes, used to support the remaining components and place them on the ground. The power assembly 2 includes a transmission wheel set 21 and a crank 22. The transmission wheel set 21 is rotatably mounted to the rear of the main frame 1 via bearings, and the transmission wheel set 21 has a central axis of rotation. One end of the crank 22 is fixedly connected to an eccentric position of the transmission wheel set 21, and the other end of the crank 22 is fixedly mounted to a crank rotation shaft 3. The axis of the crank rotation shaft 3 is parallel to and a predetermined distance (i.e., the crank length) from the central axis of rotation of the transmission wheel set 21. Rollers 4 are rotatably or fixedly mounted on the crank rotation shaft 3 via bearings.

[0034] (II) Rocker arm assembly and its installation like Figure 1 As shown, a main frame rotating shaft 5 is fixedly installed above the front of the main frame 1. The rocker arm assembly 7 is a rigid rod with a shaft hole at one end, through which it is rotatably sleeved on the main frame rotating shaft 5. The middle or upper part of the rocker arm assembly 7 is in transmission cooperation with the roller 4. Specifically, the rocker arm assembly 7 is provided with a groove or contact surface that contacts the roller 4. When the crank rotating shaft 3 drives the roller 4 to revolve around the center of the transmission wheel set 21, the roller 4 pushes the rocker arm assembly 7 to swing back and forth around the main frame rotating shaft 5.

[0035] (III) Support pipe assembly and its installation like Figure 1As shown, a main frame fixing U-shaped seat 6 is fixedly installed at the rear or middle of the main frame 1. The support tube assembly 8 is a rigid tube, one end of which is rotatably connected to the main frame fixing U-shaped seat 6 by a pin or bolt, so that the support tube assembly 8 can swing around the connection point.

[0036] (iv) Pedal mounting base and its connection like Figure 2 As shown, the pedal fixing seat 9 is a U-shaped pedal seat, which has a base plate and two side walls, and has an overall U-shaped cross-section. The upper part of the pedal fixing seat 9 (i.e., the upper ends of the two side walls) has coaxial holes, which are rotatably connected to the other end of the rocker arm assembly 7 via a rotating shaft 10. The lower part of the pedal fixing seat 9 (i.e., the lower ends of the two side walls) has coaxial holes, which are rotatably connected to the other end of the support tube assembly 8 via a rotating shaft 11. The rotating shaft 10 and the rotating shaft 11 are parallel to each other and arranged vertically.

[0037] (v) Pedal and its installation like Figure 2 As shown, the pedal 12 is fixedly mounted to the upper surface of the pedal mounting base 9 by bolts. Optionally, an angle adjustment device is provided between the pedal 12 and the pedal mounting base 9, for example, an arc-shaped groove and mounting holes of different heights are provided on the bottom surface of the pedal 12, and the tilt angle of the pedal 12 relative to the horizontal plane is adjusted by changing the position of the fastener in the arc-shaped groove.

[0038] (vi) Symmetrical mechanism and synchronous linkage like Figure 3 As shown, the main frame 1 has two symmetrical sets of mechanisms, one for the left foot stepping motion and the other for the right foot stepping motion. Both sets of mechanisms share the same transmission wheel assembly 21, which has two cranks 22 connected to the left and right crank rotation shafts 3 and rollers 4, respectively. The left and right rocker arm assemblies 7 are connected by a synchronous connecting rod, the two ends of which are hinged to the left and right rocker arm assemblies 7, enabling the left and right pedals 12 to move alternately up and down.

[0039] Assembly process First, the transmission wheel set 21 is mounted on the main frame 1 via bearings, the crank 22 is fixed at the eccentric position of the transmission wheel set 21, the crank rotation shaft 3 is mounted on the free end of the crank 22, and the roller 4 is mounted on the crank rotation shaft 3.

[0040] Then, fix the main frame rotating shaft 5 and the main frame fixing U-shaped seat 6 to the corresponding positions of the main frame 1.

[0041] Next, insert one end of the swing arm assembly 7 into the main frame rotating shaft 5, and install one end of the support tube assembly 8 onto the main frame fixed U-shaped seat 6 via a pin.

[0042] Then, the upper end of the pedal fixing seat 9 is hinged to the other end of the rocker arm assembly 7 via the first rotating shaft 10, and the lower end of the pedal fixing seat 9 is hinged to the other end of the support tube assembly 8 via the second rotating shaft 11.

[0043] Finally, fix pedal 12 to the upper surface of pedal mounting base 9 with bolts, and adjust the angle of pedal 12 as needed. For the two sets of mechanisms that are symmetrical on the left and right, repeat the above assembly steps and install the synchronization rod.

[0044] Usage process and operating principle When using the exercise bike, the user steps on the left and right pedals 12 with both feet respectively, and can hold the handrails (not shown in the picture) with both hands. The user applies force with their lower limbs to move one pedal 12 downwards.

[0045] like Figure 3 As shown, when the left pedal 12 is pressed, the left pedal mounting base 9 moves downward, causing the left rocker arm assembly 7 to swing downward around the main frame rotation axis 5. At the same time, the left support tube assembly 8 swings downward around the main frame mounting U-shaped seat 6. The swing of the left rocker arm assembly 7 drives the left crank rotation axis 3 to rotate through the roller 4, which in turn drives the transmission wheel set 21 to rotate.

[0046] The rotation of the transmission wheel assembly 21 simultaneously drives the right crank 22 and crank shaft 3 to rotate, and the right roller 4 pushes the right rocker arm assembly 7 to swing upward, thereby raising the right pedal 12 upward through the right pedal mounting base 9. The synchronizing linkage ensures that the up and down movements of the left and right pedals 12 are strictly alternating.

[0047] During the above process, since the upper and lower ends of the pedal fixing seat 9 are constrained by the rocker arm assembly 7 and the support tube assembly 8 respectively, its motion trajectory is limited to the linkage curve of the double rocker mechanism. By reasonably designing the length of the rocker arm assembly 7, the length of the support tube assembly 8, and the fixed point positions of the two on the main frame 1, this trajectory can be approximated as a vertical reciprocating straight line. What the user's feet feel is the "stepping down - lifting up" stair-climbing action.

[0048] When the user needs to adjust the exercise intensity, the rotational resistance can be increased or decreased by the resistance adjustment device (such as a magnetic resistance device) set on the transmission wheel assembly 21. When the user needs to change the step length, the length of the support tube assembly 8 can be adjusted (such as by using a telescopic tube structure) to change the vertical travel of the pedal 12. When the user needs to adjust the pedal angle, the angle adjustment device can be operated to raise or lower the front end of the pedal 12 to adapt to different ankle joint comfort positions.

[0049] The foregoing description illustrates and describes preferred embodiments of the present invention. As previously stated, it should be understood that the present invention is not limited to the forms disclosed herein and should not be construed as excluding other embodiments. It can be used in various other combinations, modifications, and environments, and can be altered within the scope of the inventive concept described herein through the foregoing teachings or techniques or knowledge in related fields. Any modifications and variations made by those skilled in the art that do not depart from the spirit and scope of the present invention should be within the protection scope of the appended claims.

Claims

1. A stepping mountain climbing exercise bike, characterized in that, include: Main frame (1); The power assembly (2) is rotatably mounted on the main frame (1) and has a central axis of rotation; The crank rotating shaft (3) is connected to the power assembly (2) for transmission, and the axis of the crank rotating shaft (3) is parallel to and a predetermined distance away from the rotation center axis of the power assembly (2); Roller (4) is fixedly installed on the crank rotating shaft (3); The rocker arm assembly (7) is rotatably connected at one end to the main frame (1), and the rocker arm assembly (7) is in transmission cooperation with the roller (4); The support tube assembly (8) is rotatably connected at one end to the main frame (1); The upper end of the pedal fixing seat (9) is rotatably connected to the other end of the rocker arm assembly (7), and the lower end is rotatably connected to the other end of the support tube assembly (8); The pedal (12) is fixedly installed on the upper surface of the pedal mounting base (9).

2. The stepping mountain exercise bike according to claim 1, characterized in that, The swing arm assembly (7) is rotatably connected to the main frame (1) via a main frame rotation shaft (5).

3. The stepping mountain exercise bike according to claim 1, characterized in that, The support tube assembly (8) is rotatably connected to the main frame (1) via a main frame fixed U-shaped seat (6).

4. The stepping mountain exercise bike according to claim 1, characterized in that, The pedal fixing seat (9) is a pedal U-shaped seat.

5. The stepping mountain exercise bike according to claim 1, characterized in that, The upper end of the pedal fixing seat (9) is rotatably connected to the rocker arm assembly (7) via a rotating shaft one (10), and the lower end is rotatably connected to the support tube assembly (8) via a rotating shaft two (11).

6. The stepping mountain exercise bike according to claim 1, characterized in that, The roller (4) and the rocker arm assembly (7) are in rolling or sliding contact. The rocker arm assembly (7) is provided with a contact surface or groove that cooperates with the roller (4).

7. The stepping mountain exercise bike according to claim 1, characterized in that, The power assembly (2) includes a transmission wheel set (21) which is rotatably mounted on the main frame (1); it also includes a crank (22) with one end connected to the transmission wheel set (21) and the crank rotation shaft (3) fixedly mounted on the other end of the crank (22).

8. The stepping mountain exercise bike according to claim 1, characterized in that, The support tube assembly (8) is a telescopic tube structure with adjustable length.

9. A stepping mountain exercise bike according to claim 4, characterized in that, An angle adjustment device is provided between the pedal (12) and the pedal U-shaped seat (9) to adjust the tilt angle of the pedal (12) relative to the horizontal plane.

10. A stepping mountain exercise bike according to claim 1, characterized in that, The main frame (1) is provided with two sets of symmetrical mechanisms, which are used for the left foot stepping movement and the right foot stepping movement respectively. The two sets of mechanisms share the same power component (2). The swing arm assemblies (7) on the left and right sides are connected to each other through synchronous linkages to realize the alternating movement of the left and right pedals.

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