Human body jogging imitating fitness elliptical track exercise bicycle

Abstract

The invention relates to the technical field of sports bicycles, in particular to an elliptical track sports bicycle simulating human body jogging fitness. Comprising a handlebar, a frame, a middle shaft, a chain wheel, a seat, a guide groove, a driven gear, a chain, a crank, a rolling bearing, a connecting shaft, a connecting rod, a pedal shaft, a pedal plate, a rotating shaft, a PU guide roller, a rear wheel, a rear wheel shaft, a PU cylindrical roller, a first bevel gear, a second bevel gear, a transmission shaft, a third bevel gear and a fourth bevel gear. In combination with linkage transmission of a connecting rod, a crank, a middle shaft, a crankset and a chain or a bevel gear set, similar jogging actions of two feet are achieved, parts such as hands, arms, shoulders, the back, the waist, the crotch, the buttocks and legs are driven to do whole-body exercise, compared with a common bicycle, protection on knees is more advantageous, and the bicycle has the advantages of being light, convenient and easy to move, is suitable for being used in multiple scenes and has wide application prospects. The fitness efficiency is improved by means of a whole-body synergetic force exerting exercise mode, and the fitness equipment is suitable for people with body shaping, fat reducing and weight losing functions.

Description

Technical Field

[0001] This invention relates to the field of exercise bike technology, specifically to an elliptical trajectory exercise bike that mimics human body jogging and fitness. Background Technology

[0002] In the field of fitness equipment, bicycles, elliptical trainers, and exercise bikes have become mainstream choices for indoor and outdoor fitness due to their unique exercise modes and training effects. They are widely applicable to various scenarios such as daily commutes, home workouts, and specialized training in gyms. Among them, bicycles are commonly used for daily travel and basic fitness due to their simple operation and convenient mobility. Elliptical trainers are favored by people with sensitive joints due to their low-impact exercise characteristics and are often used for full-body aerobic training in gyms.

[0003] While bicycles, with their circular pedaling motion, offer the advantage of convenient mobility, the circular motion of the foot can cause significant shearing forces on the knee joints, potentially leading to knee strain with prolonged use. Furthermore, their exercise primarily targets the lower limbs, making it difficult to achieve a full-body workout. Elliptical trainers, while reducing knee pressure through a near-elliptical trajectory and providing exercise for both upper and lower limbs, are generally bulky and have poor mobility, making them unsuitable for flexible indoor and outdoor use and limiting user convenience. Therefore, there is a need to design elliptical-track exercise bikes that mimic the human body's jogging motion to meet the diverse fitness needs of different groups in various indoor and outdoor settings, including body shaping, weight loss, and joint protection. Summary of the Invention

[0004] To address the problems in the existing technology, this invention provides a human-inspired elliptical trajectory exercise bike for jogging and fitness.

[0005] The technical solution adopted by this invention to solve its technical problem is: a human-inspired elliptical trajectory exercise bicycle, including handlebars, a frame mounted on the handlebars, a bottom bracket rotatably connected to the frame, a chainring fixedly connected to one end of the bottom bracket, a crank fixedly connected to the chainring, and another crank fixedly connected to the other end of the bottom bracket. A connecting rod is mounted on the two cranks via a rolling shaft and a rolling bearing. A rotating shaft is fixedly connected to the connecting rod, and a guide roller is rotatably connected to the rotating shaft. A rear wheel and a driven gear are mounted on the frame via a rear axle. The driven gear and the chainring are driven by a chain. The frame has a guide groove with a U-shaped cross-section. The guide roller rolls in contact with the guide groove. A front wheel is mounted on the handlebars via a mounting shaft. A pedal axle is rotatably connected to the connecting rod, and a pedal is mounted on the pedal axle. The two cranks, rotating shaft, rolling bearing, connecting shaft, connecting rod, pedal axle, pedal, and guide roller are arranged symmetrically about the center of the frame.

[0006] Specifically, the frame is detachably connected to a seat, and the height of the foot pedal axle is set lower than that of the guide rollers.

[0007] Specifically, the guide roller is a PU wear-resistant self-aligning bearing roller, which rolls in conjunction with the U-shaped guide groove.

[0008] Specifically, the guide roller assembly is a roller assembly composed of PU cylindrical rollers and PU guide rollers. The cylindrical surface of the PU cylindrical rollers rolls in contact with the surface above the frame, and the PU rollers roll in cooperation with the lower U-shaped guide groove. The PU roller assembly is constrained in rolling cooperation by the U-groove below the frame and the upper surface.

[0009] Specifically, the guide groove is arranged in a straight line, and the guide roller rolls in cooperation with the straight guide groove.

[0010] Specifically, the guide groove is arranged in a straight line, and the guide roller assembly rolls in cooperation with the straight guide groove below the frame and the surface above the frame.

[0011] Specifically, the guide groove is arranged in an upper arc shape, and the guide roller rolls in cooperation with the upper arc-shaped guide groove.

[0012] Specifically, the guide groove is arranged in an upward arc shape, and the guide roller assembly rolls in cooperation with the upward arc-shaped guide groove below the frame and the surface above the frame.

[0013] Specifically, the guide groove is arranged in a downward arc shape, and the guide roller rolls within the downward arc-shaped guide groove.

[0014] Specifically, the guide groove is arranged in a downward arc shape, and the guide roller assembly rolls in cooperation with the downward arc-shaped guide groove below the frame and the surface above the frame.

[0015] Specifically, the line connecting the center of the chainring and the driven gear, and the line connecting the center of the rear wheel and the center of the front wheel at the handlebars, form an acute angle. The connecting rod is centered on the pedal axle, and the angle between it and the connecting shaft and the rotating shaft is an acute angle.

[0016] Specifically, the line connecting the center of the chainring and the driven gear is perpendicular to the line connecting the center of the rear wheel and the center of the front wheel at the handlebars. The connecting rod is centered on the pedal axle, and the angle between it and the connecting shaft and the rotating shaft is a right angle.

[0017] Specifically, the line connecting the center of the chainring and the driven gear, and the line connecting the center of the rear wheel and the center of the front wheel at the handlebars, form an obtuse angle. The connecting rod, with the pedal axle as its center, forms an obtuse angle with the connecting shaft and the rotating shaft.

[0018] Specifically, a first bevel gear is fixedly connected to the central shaft, a second bevel gear meshes with the first bevel gear, a drive shaft is fixedly connected to the second bevel gear, a third bevel gear is fixedly connected to the drive shaft, a fourth bevel gear meshes with the third bevel gear, the fourth bevel gear is fixedly connected to the rear wheel axle, and the rear wheel axle drives the rear wheel to roll, so as to realize shaft transmission from the central shaft to the rear wheel to replace chain transmission.

[0019] The beneficial effects of this invention are: The elliptical trajectory exercise bike that mimics human body jogging, as described in this invention, achieves a near-jogging exercise by using the rolling coordination of the U-shaped guide groove and guide rollers on the frame, combined with the linkage transmission of connecting rods, cranks, bottom brackets, chain and chain, or bevel gear sets. This allows for a full-body coordinated workout suitable for both indoor and outdoor use, simultaneously exercising the hands, arms, shoulders, back, waist, hips, buttocks, and legs. Compared to ordinary bicycles, it offers better knee protection and is lightweight and easy to move, adapting to various usage scenarios. Furthermore, its full-body coordinated movement mode enhances fitness efficiency, making it suitable for individuals seeking body shaping, weight loss, and fat reduction, providing them with an efficient and suitable fitness option. Attached Figure Description

[0020] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0021] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the connection structure between the frame and handlebars of the present invention; Figure 3 This is a schematic diagram of the connection structure between the toothed disc and the central shaft of the present invention; Figure 4 This is a schematic diagram of the connection structure between the guide roller and the connecting rod of the present invention; Figure 5 This is a schematic diagram of the guide groove of the present invention; Figure 6 This is a schematic diagram of the connection structure between the guide roller and the vehicle frame of the present invention; Figure 7 This is a schematic diagram of the connection structure between the connecting rod and the rotating shaft and the guide roller assembly and the vehicle frame guide groove of the present invention; Figure 8 This is a schematic diagram of the connection structure between the foot pedal shaft and the foot pedal of the present invention; Figure 9 This is a schematic diagram of the connection structure between the foot pedal shaft and the connecting rod of the present invention; Figure 10 This is a schematic diagram of the connecting rod structure of the present invention.

[0022] Figure 11This is a schematic diagram of the connection structure between the second bevel gear and the transmission shaft of the present invention.

[0023] In the diagram: 1. Handlebars; 2. Frame; 3. Bottom bracket; 4. Chainring; 5. Seat; 6. Guide groove; 7. Driven gear; 8. Chain; 9. Crank; 10. Rolling bearing; 11. Connecting shaft; 12. Linkage rod; 13. Pedal axle; 14. Pedal; 15. Shaft; 16. Guide roller; 17. Rear wheel; 18. Rear axle; 19. PU cylindrical roller; 20. First bevel gear; 21. Second bevel gear; 22. Drive shaft; 23. Third bevel gear; 24. Fourth bevel 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] Example 1:

[0026] like Figure 1 , Figure 2 , Figure 3 , Figure 6 and Figure 10 As shown, the elliptical jogging exercise bike of the present invention includes a handlebar 1, a frame 2 mounted on the handlebar 1, a central axle 3 rotatably connected to the frame 2, a chainring 4 fixedly connected to one end of the central axle 3, a crank 9 fixedly connected to the chainring 4, another crank 9 fixedly connected to the other end of the central axle 3, a connecting rod 12 mounted on the crank 9 via a pivot 11 and a bearing 10, a pivot 15 fixedly connected to the connecting rod 12, a guide roller 16 rotatably connected to the pivot 15, and a rear wheel 17 mounted on the frame 2 via a rear axle 18. Driven gear 7 is driven by chain 8. The frame 2 is provided with guide groove 6, which has a U-shaped cross section. Guide roller 16 rolls with guide groove 6. The front wheel is mounted on handlebar 1 via mounting shaft. Pedal shaft 13 is rotatably connected to connecting rod 12. Pedal 14 is mounted on pedal 13. Two cranks 9, rolling bearing 10, connecting shaft 11, connecting rod 12, pedal shaft 13, pedal 14, pivot 15, and guide roller 16 are arranged symmetrically about the center of frame 2.

[0027] The principle and beneficial effects of the above technical solution: The connecting rod 12 pulls the crank 9 through the rolling bearing 10 and the rotating shaft 11, so that the crank 9 drives the central shaft 3 and the chainring 4 to make circular motion. The chainring 4 drives the driven gear 7 through the chain 8, which in turn drives the rear wheel axle 18 to drive the rear wheel 17 to rotate, so that the bicycle moves forward. Through the coordination and constraint of the guide roller 16 and the U-shaped guide groove 6, the pedal 14 forms an approximately elliptical trajectory that conforms to the human body when jogging. Compared with the circular trajectory of ordinary bicycles, it greatly reduces the bending range of the knees and the risk of strain. Moreover, when standing and riding, the hands and feet can naturally coordinate their forces, comprehensively exercising the whole body muscle groups such as hands, arms, shoulders, back, waist, hips, and legs. It takes into account the knee protection effect and fitness efficiency. The overall structure is lightweight and easy to move, suitable for use in multiple indoor and outdoor scenarios, and friendly to people who want to shape their bodies and lose weight. At the same time, it has the advantages of simple structure and smooth power transmission, effectively improving the riding smoothness and user experience.

[0028] In this embodiment, the frame 2 is detachably connected to the seat 5, and the height of the foot pedal axle 13 is set lower than that of the guide roller 16.

[0029] The principle and beneficial effects of the above technical solution: The detachable seat 5 allows users to switch sitting positions to relieve discomfort when they are tired from standing exercise, which significantly improves the flexibility of use.

[0030] In this embodiment, the guide roller 16 is a PU wear-resistant self-aligning bearing roller, which rolls in conjunction with the U-shaped guide groove 6.

[0031] The principle and beneficial effects of the above technical solution: The guide roller 16 adopts a PU wear-resistant self-aligning bearing roller, which can reduce motion noise and wear, and automatically correct the jamming phenomenon caused by the axial torque brought to the roller 16 by the human body when pedaling. The roller 16 moves left and right in the guide U-shaped groove due to the deviation of its movement trajectory.

[0032] In this embodiment, the guide groove 6 is arranged in a straight line, and the guide roller 16 rolls in cooperation with the straight guide groove 6.

[0033] The principle and beneficial effects of the above technical solution: When the guide roller 16 makes linear reciprocating motion in the groove, the resistance is uniform and the trajectory is stable, which can reduce shaking and noise during the movement and effectively improve the smoothness of riding. Its trajectory characteristics make the elliptical trajectory of the pedal more balanced in the forward and backward and up and down travel, and the force on the knee joint is linearly distributed, which makes the protection of the knee more universal and can be adapted to users of different heights and leg proportions, taking into account both the knee protection effect and the suitability of use.

[0034] In this embodiment, the line connecting the center of the chainring 4 and the driven gear 7, and the line connecting the center of the rear wheel 17 and the center of the front wheel at the handlebar 1, form an acute angle. The connecting rod 12 is centered on the pedal axle 13, and the angle between it and the connecting shaft 11 and the rotating shaft 15 is an acute angle.

[0035] The principle and beneficial effects of the above technical solution: The acute angle layout allows the front of the pedal to be closer to the ground, and the leg push-off angle is closer to the natural jogging pedaling posture, which can reduce the bending range and shear force of the knee joint and significantly reduce the risk of knee strain.

[0036] Working principle and beneficial effects of Example 1: The user stands and firmly grips the handlebars 1 to drive the pedals 14. The pedal axle 13 drives the connecting rod 12 to move. The connecting rod 12, connected to the guide roller 16 via the rotating shaft 15, rolls smoothly within the U-shaped guide groove 6 of the frame 2. Simultaneously, the connecting rod 12 pulls the crank 9 via the rolling bearing 10 and the rotating shaft 11, causing the crank 9 to drive the bottom bracket 3 and chainring 4 to perform circular motion. The chainring 4 drives the driven gear 7 via the chain 8, which in turn drives the rear wheel axle 18 and the rear wheel 17 to rotate, thus propelling the bicycle forward. With the coordination and constraint of the guide groove 6, the foot pedal 14 forms an approximately elliptical trajectory that conforms to the human body during jogging. Compared with the circular trajectory of ordinary bicycles, this greatly reduces the bending range of the knees and the risk of strain. Moreover, when standing and riding, it can naturally achieve coordinated force exertion of the hands and feet, comprehensively exercising the whole body muscle groups such as hands, arms, shoulders, back, waist, hips, and legs. It takes into account both knee protection and fitness efficiency. The overall structure is lightweight and easy to move, suitable for use in various indoor and outdoor scenarios. It is friendly to people who want to shape their bodies and lose weight. At the same time, it has the advantages of simple structure and smooth power transmission, effectively improving the riding smoothness and user experience.

[0037] Example 2:

[0038] Please see the appendix Figure 1 — Figure 3 Based on Embodiment 1, the guide groove 6 is arranged in a straight line, and the guide roller 16 rolls in cooperation with the straight guide groove 6.

[0039] The working principle and beneficial effects of Example 2: During use, the guide roller 16 rolls in cooperation with the linear guide groove 6. When the guide roller 16 makes linear reciprocating motion in the groove, the resistance is uniform and the trajectory is stable, which can reduce shaking and noise during the movement and effectively improve the smoothness of riding. Its trajectory characteristics make the elliptical trajectory of the pedal more balanced in the forward and backward and up and down travel, and the force on the knee joint is linearly distributed, which makes the protection of the knee more universal and can be adapted to users of different heights and leg proportions, taking into account both the knee protection effect and the adaptability of use.

[0040] Example 3:

[0041] Please see the appendix Figure 4 Based on Embodiment 1, the guide groove 6 is arranged in an upper arc shape, and the guide roller 16 rolls in cooperation with the upper arc-shaped guide groove 6.

[0042] The working principle and beneficial effects of Example 3: During operation, the user stands and firmly grips the handlebars 1 to drive the foot pedal 14. The foot pedal 14 drives the connecting rod 12 to move, and the guide roller 16 rolls within the arc-shaped guide groove 6. The trajectory of the upper arc-shaped guide groove 6 is raised upward, which allows the upper half of the elliptical trajectory of the foot pedal to be more extended during exercise. This matches the upward force logic of the legs when jogging, which can reduce excessive tension on the front thigh muscles and reduce pressure above the knee joint. At the same time, it increases the upward force space when pedaling, making the coordinated lifting action of the hands and feet smoother. It is suitable for people with good leg flexibility who pursue a relaxed exercise posture, and optimizes the force application experience on the basis of knee protection.

[0043] Example 4:

[0044] Please see the appendix Figure 5 Based on Embodiment 1, the guide groove 6 is arranged in a downward arc shape, and the guide roller 16 rolls and engages within the downward arc-shaped guide groove 6.

[0045] The working principle and beneficial effects of Example 4: During operation, the guide roller 16 rolls flexibly within the lower arc-shaped guide groove 6. The trajectory of the lower arc-shaped guide groove 6 is concave downwards, making the lower half of the elliptical path of the foot more in line with the ground. The force angle of the leg when stepping is closer to the natural running push-off posture, which can enhance the participation of the hamstring and gluteal muscles, improve the efficiency of lower body power generation, and make the knee joint flexion range more gentle, avoiding the joint burden caused by excessive knee lifting. It is suitable for people with strong leg strength who prefer a steady stepping force. Users can achieve a full-body exercise by coordinating the force of their hands and feet while standing, which not only meets the needs of body shaping and weight loss, but also effectively protects the knee joint, taking into account both fitness effect and exercise safety.

[0046] Example 5:

[0047] Please see the appendix Figure 8 Based on Embodiment 1, the center line connecting the chainring 4 and the driven gear 7 is set at a right angle to the center line connecting the center of the rear wheel 17 and the center line of the front wheel at the handlebar 1. The connecting rod 12 is centered on the pedal axle 13, and the angle between it and the connecting shaft 11 and the rotating shaft 15 is a right angle.

[0048] The working principle and beneficial effects of Example 5: When the user steps on the pedal 14, the connecting rod 12 forms a right angle with the pedal shaft 13 as the center. Under the constraint of the guide groove 6 and the guide roller 16, the pedal moves in a more central and balanced trajectory. The knee joint maintains a relatively neutral force angle throughout the entire pedaling cycle, avoiding force concentration in local strokes. The knee protection effect is more stable. At the same time, the balanced trajectory makes pedaling force more smooth, and the connection between the lifting and pedaling actions of the hands and feet is more natural. It can take into account the coordination of the upper and lower limbs. It is suitable for users who pursue a stable exercise posture, have sensitive knees, or need to ride for a long time for fitness. It not only ensures the effect of whole-body exercise, but also further reduces the burden on the joints and improves the comfort of long-term exercise.

[0049] Example 6:

[0050] Please see the appendix Figure 9 Based on Embodiment 1, the center line connecting the chainring 4 and the driven gear 7 and the center line connecting the rear wheel 17 and the center of the front wheel at the handlebar 1 are set at an obtuse angle. The connecting rod 12 is centered on the pedal axle 13, and the angle between it and the connecting shaft 11 and the rotating shaft 15 is an obtuse angle.

[0051] The working principle and beneficial effects of Example 6: When the user steps on the foot pedal 14, the connecting rod 12 forms an obtuse angle with the foot pedal axle 13 as the center. Under the constraint of the guide groove 6 and the guide roller 16, the rear travel of the foot pedal extends downward more fully, and the front travel rises more significantly. The difference in height between the front and rear of the trajectory is more prominent. The full downward pedaling stroke on the rear side can maximize the activation of the muscles of the hamstring, buttocks and calves, improving the efficiency of lower body fitness. The upward trajectory on the front side matches the forward extension posture of the legs when jogging, reducing the pulling sensation on the back of the knee joint. At the same time, the force connection when the hands and feet work together to lift the handlebars 1 is smoother, which can enhance the effect of whole-body coordinated exercise. It is suitable for users with strong leg strength who pursue full force and extension exercise experience. On the basis of knee protection, it further enhances the targeted lower body shaping and strength training, and improves the accuracy of fitness.

[0052] Example 7:

[0053] Please see the appendix Figure 1 and Figure 7 Based on Embodiment 1, the PU guide roller 16 and the PU cylindrical roller 19 form a roller assembly. The PU cylindrical roller 19 rolls in contact with the surface on the frame 2, and the PU guide roller 16 rolls in cooperation with the U-shaped guide groove 6 below. The roller assembly is constrained in rolling cooperation by the surface on the frame 2 and the U-shaped guide groove 6 below the frame.

[0054] The working principle and beneficial effects of Example 7: In use, the roller assembly consisting of PU guide roller 16 and PU cylindrical roller 19 rolls in cooperation with the lower U-shaped guide groove 6 and the upper surface of the frame. When the roller assembly consisting of PU guide roller 16 and PU cylindrical roller 19 reciprocates in the groove, the resistance is uniform and the trajectory is stable, which can reduce shaking and noise during the movement and effectively improve the smoothness of riding. This combination of rollers fully solves the axial torque on PU guide roller 16 when overweight people forcefully step on the pedal. Its trajectory characteristics make the elliptical trajectory of the pedal more balanced in the front and back and up and down travel, and the force on the knee joint presents a linear distribution, which makes the protection of the knee more universal and can be adapted to users with overweight, different heights and leg proportions, taking into account both knee protection effect and usability.

[0055] Example 8:

[0056] Please see the appendix Figure 11 Based on Embodiment 1, a first bevel gear 20 is fixedly connected to the central shaft 3, a second bevel gear 21 meshes with the first bevel gear 20, a drive shaft 22 is fixedly connected to the second bevel gear 21, a third bevel gear 23 is fixedly connected to the drive shaft 22, a fourth bevel gear 24 meshes with the third bevel gear 23, and the fourth bevel gear 24 is fixedly connected to the rear wheel axle 18. The rear wheel axle 18 drives the rear wheel 17 to roll, thereby realizing shaft transmission from the central shaft 3 to the rear wheel 17 to replace chain transmission.

[0057] The working principle and beneficial effects of Example 8: During use, the central shaft 3 rotates synchronously. The first bevel gear 20 on the central shaft 3 meshes with and drives the second bevel gear 21. The second bevel gear 21 drives the third bevel gear 23 to rotate through the transmission shaft 22. The third bevel gear 23 meshes with and drives the fourth bevel gear 24, thereby driving the rear wheel axle 18 and the rear wheel 17 to roll. This realizes shaft transmission to replace traditional chain transmission. Compared with chain transmission, shaft transmission has higher transmission efficiency, smoother operation without jamming, and can also avoid the problems of chain loosening, falling off or wear, thus extending the service life of the equipment.

[0058] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0059] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A cycling bike that mimics the elliptical trajectory of human jogging, characterized by: The bicycle includes handlebars (1), a frame (2) mounted on the handlebars (1), a bottom bracket (3) rotatably connected to the frame (2), a chainring (4) fixedly connected to one end of the bottom bracket (3), a crank (9) fixedly connected to the chainring (4), another crank (9) fixedly connected to the other end of the bottom bracket (3), a connecting shaft (11) fixedly connected to the crank (9), a connecting rod (12) mounted on the connecting shaft (11) via a rolling bearing (10), a pivot (15) fixedly connected to the connecting rod (12), a guide roller (16) rotatably connected to the pivot (15), and a rear wheel (17) and a driven gear mounted on the frame (2) via a rear wheel axle (18). The wheel (7) is driven by the driven gear (7) and the chain (4) through a chain (8). The frame (2) is provided with a guide groove (6). The cross section of the guide groove (6) is U-shaped. The guide roller (16) rolls with the guide groove (6). The handlebar (1) is mounted with a front wheel through a mounting shaft. The connecting rod (12) is rotatably connected to a pedal shaft (13). The pedal shaft (13) is mounted with a foot pedal (14). The two cranks (9), rolling bearings (10), connecting shaft (11), connecting rod (12), pedal shaft (13), foot pedal (14), rotating shaft (15), and guide roller (16) are arranged symmetrically about the center of the frame (2).

2. The elliptical trajectory exercise bike for jogging and fitness according to claim 1, characterized in that: The frame (2) is detachably connected to a seat (5). The foot pedal axle (13) is set at a height lower than the guide roller (16). The guide roller (16) is a PU wear-resistant self-aligning bearing roller, which rolls in cooperation with the U-shaped guide groove (6).

3. The elliptical trajectory exercise bike for jogging and fitness according to claim 1, characterized in that: The PU guide roller (16) and the PU cylindrical roller (19) form a roller assembly. The PU cylindrical roller (19) rolls in contact with the surface of the frame (2). The PU guide roller (16) rolls in cooperation with the U-shaped guide groove (6) below. The roller assembly is constrained in rolling cooperation by the surface of the frame (2) and the U-shaped guide groove (6) below the frame.

4. The elliptical trajectory exercise bike for jogging and fitness according to claim 1, characterized in that: The guide groove (6) is arranged in a straight line, and the guide roller (16) rolls in cooperation with the straight guide groove (6).

5. The elliptical trajectory exercise bike for jogging and fitness according to claim 1, characterized in that: The guide groove (6) is arranged in an upper arc shape, and the guide roller (16) rolls in cooperation with the upper arc-shaped guide groove (6).

6. The elliptical trajectory exercise bike for jogging and fitness according to claim 1, characterized in that: The guide groove (6) is arranged in a lower arc shape, and the guide roller (16) rolls and engages within the lower arc-shaped guide groove (6).

7. The elliptical trajectory exercise bike for jogging and fitness according to claim 1, characterized in that: The center line connecting the chainring (4) and the driven gear (7) and the center line connecting the rear wheel (17) and the center line connecting the front wheel at the handlebar (1) are set at an acute angle. The connecting rod (12) is centered on the pedal axle (13), and the angle between it and the connecting shaft (11) and the rotating shaft (15) is an acute angle.

8. The elliptical trajectory exercise bike for jogging and fitness according to claim 1, characterized in that: The center line connecting the chainring (4) and the driven gear (7) is perpendicular to the center line connecting the center of the rear wheel (17) and the center line connecting the front wheel at the handlebar (1). The connecting rod (12) is centered on the pedal axle (13), and the angle between it and the connecting shaft (11) and the rotating shaft (15) is a right angle.

9. The elliptical trajectory exercise bike for jogging and fitness according to claim 1, characterized in that: The center line connecting the chainring (4) and the driven gear (7) and the center line connecting the rear wheel (17) and the center line connecting the front wheel at the handlebar (1) are set at an obtuse angle. The connecting rod (12) is centered on the pedal axle (13), and the angle between it and the connecting shaft (11) and the rotating shaft (15) is an obtuse angle.

10. The elliptical trajectory exercise bike for jogging and fitness according to claim 1, characterized in that... As shown in Figure 11: A first bevel gear (20) is fixedly connected to the central shaft (3), a second bevel gear (21) meshes with the first bevel gear (20), a transmission shaft (22) is fixedly connected to the second bevel gear (21), a third bevel gear (23) is fixedly connected to the transmission shaft (22), a fourth bevel gear (24) meshes with the third bevel gear (23), and the fourth bevel gear (24) is fixedly connected to the rear wheel axle (18). The rear wheel axle (18) drives the rear wheel (17) to roll, so as to realize shaft transmission from the central shaft (3) to the rear wheel (17) instead of chain transmission.

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