Spinning bicycle

Abstract

The invention relates to the technical field of fitness equipment, in particular to a spinning which comprises a base and a frame, a pitching adjusting assembly is arranged on the base and comprises a lead screw, a driving block, an adjusting connecting rod and a driving motor, the lead screw guides the driving block to slide, and the adjusting connecting rod adjusts the angle of the frame while the driving block slides. Before the lead screw rotates, the positioning blocks installed on the two sides of the driving block can be unlocked from the base, so that the acting force generated by the frame can be transmitted to the base through the adjusting connecting rod, the driving block and the positioning blocks, and the acting force is prevented from being directly transmitted to the lead screw and a motor used for driving the lead screw to rotate; the problem that when the angle of an existing frame is adjusted, acting force can be completely transmitted to angle adjusting drive is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of fitness equipment, and particularly to a spinning bike. Background Art

[0002] Due to its characteristics of being easy to learn and effectively exercising the whole body muscles, the spinning bike has gradually become a popular aerobic exercise, widely used in gyms and home fitness. As a common fitness equipment, it not only helps people maintain a healthy body posture but also improves cardiopulmonary function, becoming a part of modern fitness. However, most of the spinning bikes on the market are currently designed for indoor environments, which inevitably makes exercisers feel monotonous and lack sufficient stimulation during exercise. At the same time, these devices cannot truly simulate the road conditions changes in outdoor cycling, such as the undulations of natural terrains like uphill and downhill. Due to this limitation, the existing spinning bikes to a certain extent restrict its popularity and usage experience, especially in fitness scenarios that require more interactivity and realism, often unable to meet the needs of exercisers.

[0003] Patent Document Publication No. CN102814025B discloses an intelligent racing / fitness bike that can swing and pitch, including a vehicle body and a base that can be stably placed on the ground or a flat surface; the vehicle body includes a frame, drive wheels, pedals, damping wheels, handlebars, and a seat; a swing mechanism is also installed between the frame of the vehicle body and the base, and the swing mechanism includes a swing bracket and a swing support assembly, and the swing bracket is connected to the base through the swing support assembly, so that the frame of the vehicle body can swing left and right relative to the base; the racing / fitness bike also includes a pitching mechanism, which is installed between the frame of the vehicle body and the swing bracket of the swing mechanism, so that the frame of the vehicle body can pitch back and forth relative to the swing bracket.

[0004] This device realizes the pitching movement through a lifting rod, and is designed to improve the exercise experience and comfort of users. However, during the use of the fitness bike, certain vibrations will inevitably occur, especially during high-intensity exercise, the amplitude and frequency of the vibrations may be relatively large. Since the entire frame depends on the lifting rod for support, these vibrations will exert repeated pressure and impact on the lifting rod. After long-term use, the stress condition of the lifting rod may cause it to fatigue, wear, or even break, affecting the stability and safety of the equipment. In addition, the uneven stress on the lifting rod may also cause other mechanical failures, such as loosening of connecting components and structural deformation, thus affecting the normal use and lifespan of the fitness bike. Summary of the Invention

[0005] In view of the problems existing in the prior art, a spinning bike is provided. By guiding the driving block to slide through a lead screw, while the driving block slides, the connecting rod is adjusted to adjust the angle of the frame. Before the lead screw rotates, the positioning blocks installed on both sides of the driving block can be unlocked from the base, so that the acting force generated by the frame can be transmitted to the base through the adjusting connecting rod, the driving block and the positioning block, avoiding the acting force being directly transmitted to the lead screw and the motor for driving the rotation of the lead screw, and solving the problem that the acting force will be completely transmitted to the angle adjustment drive when the existing frame angle is adjusted.

[0006] To solve the problems of the prior art, the present invention provides a spinning bike, including a base and a frame rotatably arranged on the base in the front-rear direction. The bottom end of the frame has a front connection end and a rear connection end located on both sides of its hinge point. An elastic buffer element is arranged between the rear connection end and the base. A pitch adjustment assembly is arranged on the base. The pitch adjustment assembly includes a lead screw, a driving block, an adjusting connecting rod and a driving motor. The lead screw is rotatably arranged on the base. The driving block is slidably arranged on the base. The lead screw passes through the driving block and is in screw drive cooperation with it. Positioning blocks capable of forming a lock with the base are arranged on both sides of the driving block. When the lead screw rotates, the positioning blocks are unlocked from the base and then the driving block moves. Two ends of the adjusting connecting rod are respectively in transmission connection with the front connection end and the driving block. The driving motor is arranged on the base, and the output shaft of the driving motor is in transmission connection with the lead screw.

[0007] Preferably, a fixing plate is arranged on the base. Engaging grooves arranged at equal intervals are arranged on the fixing plate. Engaging teeth arranged at equal intervals are arranged on the side of the positioning block facing the fixing plate. When the engaging teeth and the engaging grooves form an engaging state, the driving block forms a lock with the base.

[0008] Preferably, an installation groove is arranged in the driving block. An internal thread ring coaxial with the lead screw is arranged in the installation groove. An electromagnetic coil is arranged at one end of the internal thread ring. One end of the positioning block has a connecting arm extending into the installation groove. Transmission columns distributed along the circumferential direction of the internal thread ring are arranged on the end face of the internal thread ring. Transmission connecting rods with their ends respectively rotatably connected to them are arranged between the transmission columns and the connecting arm. When the transmission connecting rods are horizontal, the positioning block is locked with the base. When the internal thread ring rotates, the transmission connecting rods are inclined to drive the positioning block to move towards the driving block.

[0009] Preferably, there are two installation grooves and they are respectively located on both sides of the moving direction of the driving block. A connecting cylinder rotatably connected to the driving block is arranged in the driving block. The connecting cylinder is coaxial with the lead screw, and the end of the connecting cylinder is coaxially fixedly connected to the internal thread ring.

[0010] Preferably, a rack capable of moving along the tangential direction of the internal thread ring is arranged in the installation groove. Tooth grooves are arranged on the circumferential surface of the internal thread ring along its circumferential direction. The rack meshes with the tooth grooves. An elastic reset component for resetting the rack is also arranged in the installation groove. When the internal thread ring rotates, the rack needs to overcome the elastic force of the elastic reset component.

[0011] Preferably, the elastic reset component includes a smooth rod and an elastic reset element. The smooth rod is horizontally arranged in the installation groove and is perpendicular to the lead screw. A convex seat is arranged at the top end of the rack. The smooth rod passes through the convex seat and is in sliding fit with it. There are two elastic reset elements, and the two elastic reset elements are sleeved on the smooth rod and located on both sides of the convex seat.

[0012] Preferably, a guide rod extending along the length direction of the base is arranged in the base. A guide block is arranged at the bottom end of the driving block. The guide rod passes through the guide block and is in sliding fit with it.

[0013] Preferably, a hinge seat is arranged on the base. The bottom end of the vehicle frame is provided with a chassis forming an obtuse angle. The chassis has a front arm and a rear arm. A hinge shaft is arranged between the front arm and the rear arm. The front arm is rotatably connected to the adjusting link. The rear arm is rotatably connected to the elastic buffer element. The hinge shaft is rotatably connected to the hinge seat.

[0014] Preferably, a reinforcing plate extending along the horizontal direction is arranged between the front arm and the rear arm, and the reinforcing plate is higher than the hinge shaft.

[0015] Preferably, a damping wheel is arranged on the vehicle frame, and an angle sensor is arranged at the hinge of the vehicle frame. When the vehicle frame tilts backward, the rotational damping of the damping wheel increases. When the vehicle frame tilts forward, the rotational damping of the damping wheel decreases.

[0016] The beneficial effects of this application compared with the prior art are: In this application, the driving block is guided to slide by the lead screw. During the sliding process of the driving block, the angle of the adjusting link can be adjusted, thereby changing the tilting angle of the vehicle frame. To ensure the smoothness and stability of the adjustment of the vehicle frame, before the lead screw rotates, the positioning blocks installed on both sides of the driving block are unlocked with the base. When the driving block starts to slide, the acting force generated by the vehicle frame will be gradually transmitted to the base through the adjusting link, the driving block and the positioning block, thus avoiding the acting force directly acting on the lead screw and the motor driving the lead screw to rotate. In this way, when the angle of the vehicle frame is adjusted, the problem that the force is completely transmitted to the angle adjustment driving part in the previous design is avoided, the burden on the lead screw and the motor is significantly reduced, and the service life of the equipment is prolonged. It can effectively disperse and relieve the pressure during the adjustment of the vehicle frame and reduce possible mechanical wear or overload phenomena. Description of the Drawings

[0017] Figure 1 is a perspective view of a spinning bike of the present invention.

[0018] Figure 2 is a side view of a spinning bike of the present invention.

[0019] Figure 3 is a perspective view of a base and a pitch adjustment assembly in a spinning bike of the present invention.

[0020] Figure 4 is Figure 3 a partial enlarged view of part A of

[0021] Figure 5 is an exploded perspective view of a pitch adjustment assembly in a spinning bike of the present invention.

[0022] Figure 6 is Figure 5 a partial enlarged view of part B of

[0023] Figure 7 is an exploded perspective view of a drive block in a spinning bike of the present invention.

[0024] Figure 8 is a schematic diagram of a positioning block and a base in a locked state in a spinning bike of the present invention.

[0025] Figure 9 is a schematic diagram of a positioning block when an internal thread ring rotates counterclockwise in a spinning bike of the present invention.

[0026] Figure 10 is a schematic diagram of a positioning block when an internal thread ring rotates clockwise in a spinning bike of the present invention.

[0027] The reference numerals in the figure are: 1, base; 11, fixing plate; 12, guide rod; 13, hinge seat; 2, frame; 21, front connection end; 22, rear connection end; 23, drive disc; 24, crank pedal; 25, damping wheel; 261, front arm; 262, rear arm; 263, hinge shaft; 264, reinforcement plate; 27, transmission belt; 3, elastic buffer element; 41, lead screw; 42, drive block; 421, guide block; 43, adjustment connecting rod; 44, drive motor; 45, positioning block; 451, connecting arm; 46, internal thread ring; 461, transmission column; 462, tooth groove; 47, transmission connecting rod; 48, connecting cylinder; 491, rack; 4911, convex seat; 492, smooth rod; 493, elastic reset element; 51, electromagnetic coil. Detailed implementation manners

[0028] In order to further understand the features, technical means, specific objectives and functions of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0029] like Figure 1 , Figure 2 and Figure 3 As shown, a spinning bicycle comprises a base 1 and a frame 2 rotatably arranged on the base 1 along the front-back direction, the bottom end of the frame 2 has a front connecting end 21 and a rear connecting end 22 located on both sides of the hinge point thereof, an elastic buffer element 3 is arranged between the rear connecting end 22 and the base 1, a pitch adjustment assembly is arranged on the base 1, and the pitch adjustment assembly comprises a screw rod 41, a driving block 42, an adjusting connecting rod 43 and a driving motor 44, the screw rod 41 is rotatably arranged on the base 1, the driving block 42 is slidably arranged on the base 1, the screw rod 41 penetrates the driving block 42 and cooperates with the spiral transmission thereof, positioning blocks 45 capable of forming a lock with the base 1 are arranged on both sides of the driving block 42, and the positioning block 45 is unlocked from the base 1 when the screw rod 41 rotates, and the driving block 42 moves; the two ends of the adjusting connecting rod 43 are respectively connected to the front connecting end 21 and the driving block 42 in transmission connection, the driving motor 44 is arranged on the base 1, and the output shaft of the driving motor 44 is connected to the screw rod 41 in transmission connection.

[0030] The bottom end of the frame 2 is provided with a front connection end 21 and a rear connection end 22 located on both sides of the hinge point. An elastic buffer element 3 is provided between the rear connection end 22 and the base 1 to effectively absorb the vibration generated during the movement and improve the stability and comfort of riding. The base 1 is provided with a pitch adjustment component to adjust the front and rear tilt angles of the frame 2 to meet the movement needs of different users.

[0031] The screw rod 41 is rotatably arranged on the base 1 and connected to the driving block 42 through a screw transmission to ensure accurate adjustment of the angle of the frame 2. The driving block 42 is slidably arranged on the base 1, and is provided with positioning blocks 45 on both sides thereof that can be locked with the base 1. When the screw rod 41 rotates, the positioning blocks 45 are unlocked from the base 1, and the driving block 42 slides on the base 1, thereby driving the pitch angle of the frame 2 to change. The two ends of the adjusting connecting rod 43 are respectively connected to the front connecting end 21 and the driving block 42 in a transmission manner, so that the sliding of the driving block 42 can directly affect the front and rear tilt angles of the frame 2.

[0032] The device guides the sliding of the driving block 42 through the lead screw 41. During the sliding process of the driving block 42, the angle of the connecting rod 43 can be adjusted, thereby changing the inclination angle of the vehicle frame 2. To ensure the smoothness and stability of the adjustment of the vehicle frame 2, before the lead screw 41 rotates, it is unlocked from the base 1 through the positioning blocks 45 installed on both sides of the driving block 42. When the driving block 42 starts to slide, the acting force generated by the vehicle frame 2 will be gradually transmitted to the base 1 through the adjusting connecting rod 43, the driving block 42 and the positioning block 45, thus avoiding the acting force directly acting on the lead screw 41 and the motor that drives the rotation of the lead screw 41. In this way, when the angle of the vehicle frame 2 is adjusted, the problem that the force is completely transmitted to the angle adjustment driving part in the previous design is avoided, significantly reducing the burden on the lead screw 41 and the motor, and extending the service life of the equipment.

[0033] When the lead screw 41 stops rotating, the positioning blocks 45 installed on both sides of the driving block 42 are locked with the base 1 to ensure that the acting force generated after the angle adjustment of the vehicle frame 2 can be transmitted to the base 1 through the adjusting connecting rod 43, the driving block 42 and the positioning block 45. This design makes the acting force no longer directly act on the lead screw 41 and the motor part that drives the rotation of the lead screw 41, avoiding problems such as motor overload and lead screw 41 wear that may be caused by excessive force transmission in the traditional design.

[0034] In addition, a driving disc 23, a crank pedal 24 and a damping wheel 25 are arranged on the vehicle frame 2, and the driving disc 23 is connected to the flywheel through a transmission belt 27. As a power transmission device, the transmission belt 27 can transmit the user's riding force to the flywheel under the drive of the pedaling action, generating a lasting resistance and further increasing the exercise intensity. The damping wheel 25 can adjust the resistance of the flywheel, and the user can flexibly adjust it according to their own needs, so as to achieve a variety of different exercise modes.

[0035] As Figure 3 and Figure 5 shown, a fixing plate 11 is arranged on the base 1, and equally spaced engaging grooves are arranged on the fixing plate 11. On the side of the positioning block 45 facing the fixing plate 11, equally spaced engaging teeth are arranged. When the engaging teeth and the engaging grooves form an engaged state, the driving block 42 is locked with the base 1.

[0036] When the frame 2 stops adjusting the angle and the lead screw 41 is stationary, the positioning block 45 is engaged with the equally spaced engaging grooves on the fixing plate 11 mounted on the base 1 through the equally spaced engaging teeth provided on the side facing the fixing plate 11, thereby fixing the driving block 42. At this time, the precise cooperation between the engaging teeth and the engaging grooves ensures the firm locking of the driving block 42 and the base 1, preventing unnecessary displacement of the driving block 42 due to external vibration or force after the angle adjustment of the frame 2. Through this design, the frame 2 can stably maintain the target angle after stopping the adjustment, avoiding the instability of the frame 2 caused by insecure locking. At the same time, the force generated by the frame 2 can be transmitted to the base 1 through the adjusting link 43, the driving block 42, and the positioning block 45, avoiding the force being transmitted to the lead screw 41 and the motor.

[0037] As Figures 5 - 10 shown, an installation groove is provided in the driving block 42, and an internal thread ring 46 coaxial with the lead screw 41 is provided in the installation groove. An electromagnetic coil 51 is provided at one end of the internal thread ring 46. One end of the positioning block 45 has a connecting arm 451 extending into the installation groove. Transmission columns 461 are distributed along the circumferential direction of the end face of the internal thread ring 46. A transmission link 47 is provided between the transmission column 461 and the connecting arm 451, and the two ends of the transmission link 47 are rotatably connected to them respectively. When the transmission link 47 is horizontal, the positioning block 45 is locked with the base 1. When the internal thread ring 46 rotates, the transmission link 47 inclines to drive the positioning block 45 to move towards the driving block 42.

[0038] On both sides of the driving block 42, positioning blocks 45 are symmetrically installed. One end of the positioning block 45 extends out a connecting arm 451, and the connecting arm 451 is precisely inserted into the installation groove of the driving block 42. On the end face of the internal thread ring 46, a plurality of transmission columns 461 are distributed along its circumference. A transmission link 47 is installed between the transmission column 461 and the connecting arm 451, and the two ends of the transmission link 47 are rotatably connected to the transmission column 461 and the connecting arm 451 respectively.

[0039] When the lead screw 41 has not started to rotate, at this time the transmission link 47 is in a horizontal state, and the positioning block 45 is tightly engaged with the base 1 to achieve firm locking. The force generated by the frame 2 can be smoothly transmitted to the base 1 through the adjusting link 43, the driving block 42, and the positioning block 45 in sequence. It avoids the force generated during the adjustment of the frame 2 being directly applied to the lead screw 41 and the motor for driving the rotation of the lead screw 41, effectively solving the problem in the existing angle adjustment system of the frame 2 that the force is completely transmitted to the angle adjustment driving device, resulting in easy damage and shortened service life of the lead screw 41 and the motor, and greatly improving the reliability and durability of the entire angle adjustment system of the frame 2. When the angle of the vehicle frame 2 needs to be adjusted, the lead screw 41 starts to rotate. Since an electromagnetic coil 51 is provided at one end of the internal thread ring 46, the electromagnetic coil 51 is activated at this time, so as to increase the friction between the internal thread ring 46 and the lead screw 41, enabling the lead screw 41 to drive the internal thread ring 46 to rotate synchronously. As the internal thread ring 46 rotates, since the transmission column 461 rotates synchronously with the internal thread ring 46, the transmission link 47 gradually tilts under the drive of the transmission column 461. This tilting motion is further transmitted to the connecting arm 451, thereby driving the positioning block 45 to move towards the driving block 42, realizing the unlocking of the positioning block 45 from the base 1.

[0040] In the unlocked state, the connecting arm 451 abuts against the outer side of the internal thread ring 46, thereby locking the internal thread ring 46 in the installation groove until the rotational force of the lead screw 41 on the internal thread ring 46 is greater than the magnetic force of the electromagnetic coil 51 on the lead screw 41. The driving block 42 continues to slide under the rotational action of the lead screw 41, and at the same time, the angle of the vehicle frame 2 is precisely adjusted through the adjusting link 43.

[0041] As Figure 5 、 Figure 6 and Figure 7 shown, there are two installation grooves and they are respectively located on both sides of the moving direction of the driving block 42. A connecting cylinder 48 rotatably connected thereto is provided in the driving block 42. The connecting cylinder 48 is coaxial with the lead screw 41, and the end of the connecting cylinder 48 is fixedly connected to the internal thread ring 46 coaxially.

[0042] When the angle of the vehicle frame 2 needs to be adjusted, the lead screw 41 starts to rotate, driving the internal thread ring 46 and the connecting cylinder 48 coaxial with it to rotate together. As the internal thread ring 46 rotates, the transmission columns 461 distributed on its end face also perform circular motions accordingly. Since both ends of the transmission link 47 are rotatably connected to the transmission column 461 and the connecting arm 451 respectively, the circular motion of the transmission column 461 is converted into a force on the connecting arm 451 through the transmission link 47, causing the transmission link 47 to gradually tilt. This tilting motion is transmitted to the connecting arm 451, thereby driving the positioning block 45 to move towards the driving block 42, realizing the unlocking of the positioning block 45 from the base 1.

[0043] Internal thread rings 46 are installed in both installation grooves, and the two internal thread rings 46 are connected by the connecting cylinder 48, so as to increase the length of the positioning block 45, improve the contact and fitting area between the positioning block 45 and the fixing plate 11, and improve the stability of the positioning block 45.

[0044] As Figure 6As shown, a rack 491 capable of moving along the tangent direction of the internal thread ring 46 is arranged in the installation groove. Tooth grooves 462 are arranged on the circumferential surface of the internal thread ring 46 along its circumferential direction. The rack 491 meshes with the tooth grooves 462. An elastic reset component for resetting the rack 491 is further arranged in the installation groove. When the internal thread ring 46 rotates, the rack 491 needs to overcome the elastic force of the elastic reset component.

[0045] When the lead screw 41 has not started to rotate, the transmission connecting rod 47 remains in a horizontal state, and the positioning block 45 fits tightly with the base 1 and is in a firm locking state. At this time, under the action of the elastic reset component, the rack 491 fits tightly on the tooth grooves 462 of the internal thread ring 46 to ensure the initial stability of the entire system. When the angle of the vehicle frame 2 needs to be adjusted, the lead screw 41 starts to rotate, driving the connecting cylinder 48 coaxial with it to rotate together. The rotation of the connecting cylinder 48 further drives the internal thread ring 46 fixedly connected to it to rotate. As the internal thread ring 46 rotates, the rack 491 meshing with it is driven by the tooth grooves 462 to move along the tangent direction of the internal thread ring 46 against the elastic force of the elastic reset component.

[0046] When the lead screw 41 stops rotating and the internal thread ring 46 no longer drives the rack 491 to move, the elastic reset component quickly comes into play, pulling the rack 491 back to its initial position, causing the internal thread ring 46 to rotate a certain angle and keeping the positioning block 45 locked with the base 1. Preparing for the next adjustment of the angle of the vehicle frame 2.

[0047] As Figure 6 shown, the elastic reset component includes a smooth rod 492 and an elastic reset element 493. The smooth rod 492 is horizontally arranged in the installation groove. The smooth rod 492 is perpendicular to the lead screw 41. A convex seat 4911 is arranged at the top of the rack 491. The smooth rod 492 passes through the convex seat 4911 and is slidably matched with it. There are two elastic reset elements 493. The two elastic reset elements are sleeved on the smooth rod 492 and are located on both sides of the convex seat 4911.

[0048] There are two elastic reset elements 493. They are respectively sleeved on the smooth rod 492 and are located on both sides of the convex seat 4911. These two elastic reset elements 493 usually adopt high-strength and high-elasticity springs. One end of them tightly abuts against the side wall of the installation groove, and the other end is in close contact with the convex seat 4911. In the initial state, the elastic reset elements 493 are in a natural extended state, providing a stable pre-tightening force for the rack 491, making it fit tightly on the tooth grooves 462 of the internal thread ring 46 and ensuring the stability of the entire system when the lead screw 41 has not been started. In the unlocked state, the driving block 42 continuously slides under the drive of the lead screw 41, and the angle of the vehicle frame 2 is finely adjusted through the adjusting connecting rod 43.

[0049] When the lead screw 41 stops rotating and the internal thread ring 46 no longer drives the rack 491 to move, the elastic reset elements 493 on both sides quickly come into play. Under the action of their own elastic force, they quickly pull the rack 491 back to the initial position along the optical rod 492, causing the internal thread ring 46 to rotate a certain angle, thereby guiding the transmission link 47 to continue to maintain a horizontal state, enabling the positioning block 45 to lock with the base 1. The acting force generated by the vehicle frame 2 is smoothly transmitted to the base 1 through the adjusting link 43, the driving block 42, and the positioning block 45 in sequence, effectively avoiding the acting force directly acting on the lead screw 41 and the driving motor 44, and solving the problems of easy damage and short service life of the lead screw 41 and the motor in the traditional system. As Figure 5 shown, a guide rod 12 extending along the length direction thereof is provided in the base 1, and a guide block 421 is provided at the bottom end of the driving block 42. The guide rod 12 passes through the guide block 421 and is in sliding fit with it.

[0050] In the base 1, a guide rod 12 extending along the length direction thereof is provided. The guide rod 12 is similar to a track, providing a clear direction for the movement of the driving block 42. A guide block 421 is provided at the bottom end of the driving block 42. The guide rod 12 precisely passes through the guide block 421 and forms a sliding fit with it. During the movement of the driving block 42 due to the rotation of the lead screw 41, the guide block 421 slides smoothly along the guide rod 12, effectively restricting the offset and sway of the driving block 42 during the movement and ensuring that the driving block 42 always moves precisely along the established direction.

[0051] As Figure 2 、 Figure 3 and Figure 4 shown, a hinge seat 13 is provided on the base 1, and an obtuse-angle chassis is provided at the bottom end of the vehicle frame 2. The chassis has a front arm 261 and a rear arm 262. A hinge shaft 263 is provided between the front arm 261 and the rear arm 262. The front arm 261 is rotatably connected to the adjusting link 43, the rear arm 262 is rotatably connected to the elastic buffer element 3, and the hinge shaft 263 is rotatably connected to the hinge seat 13.

[0052] The unique obtuse angle shape of the chassis provides a good foundation for the angle adjustment and overall stability of the frame 2. The chassis has a front arm 261 and a rear arm 262, and a hinge shaft 263 is arranged between the front arm 261 and the rear arm 262. This hinge shaft 263 enables relative rotation between the front arm 261 and the rear arm 262, providing the possibility for the flexible deformation of the frame 2 during the angle adjustment process. The front arm 261 is rotatably connected to the adjustment link 43. When the drive block 42 pushes the frame 2 for angle adjustment through the adjustment link 43, the front arm 261 can flexibly rotate around the connection point with the adjustment link 43, accurately transmitting the driving force of the adjustment link 43 to the frame 2. The rear arm 262 is rotatably connected to the elastic buffer element 3. The elastic buffer element 3 is a gas spring and can play a role in buffering and shock absorption.

[0053] The hinge shaft 263 is rotatably connected to the hinge seat 13 on the base 1, enabling the entire frame 2 to adjust the angle of the base 1 centered on the hinge shaft 263 and realizing the flexible transformation of the angle of the frame 2.

[0054] As Figure 4 shown, a reinforcing plate 264 extending in the horizontal direction is arranged between the front arm 261 and the rear arm 262, and the reinforcing plate 264 is higher than the hinge shaft 263.

[0055] When the frame 2 is adjusting the angle, the reinforcing plate 264 can better disperse the acting forces generated by the adjustment link 43 and the frame 2 itself due to the angle change. During the process of the angle change of the frame 2, the front arm 261 and the rear arm 262 will generate relative movement around the hinge shaft 263. At this time, the reinforcing plate 264 can, by virtue of its position advantage of being higher than the hinge shaft 263, effectively share the torsional stress brought about by this relative movement, avoiding excessive stress concentration near the hinge shaft 263, thereby protecting the hinge shaft 263 and the surrounding components from the influence of excessive acting forces and extending the service life of the components.

[0056] As Figure 1 and Figure 2 shown, a damping wheel 25 is arranged on the frame 2, and an angle sensor is arranged at the hinge of the frame 2. When the frame 2 tilts backward, the rotational damping of the damping wheel 25 increases, and when the frame 2 tilts forward, the rotational damping of the damping wheel 25 decreases.

[0057] When the spinning bike simulates a climbing scenario and the frame 2 tilts backward, it prompts the induction components inside the damping wheel 25 to generate greater resistance, ultimately realizing an increase in rotational damping. It makes the user feel as if they are really in a climbing road condition, providing the user with sufficient time to adjust the riding posture and ensuring the stability and safety of riding in the simulated climbing scenario.

[0058] Conversely, when the spinning bike simulates a downhill scenario and the frame 2 tilts forward, the friction between the internal damping wheel 25 and the damping element is reduced, thereby achieving a decrease in rotational damping. The user can easily simulate the sense of acceleration during downhill, avoiding the normal forward tilt of the frame 2 being hindered by excessive damping, and ensuring that the user can maintain good riding controllability and stability during simulated downhill and various other riding conditions.

[0059] The above embodiments only represent one or several implementation manners of the present invention, and the description thereof is relatively specific and detailed, but it should not be construed as a limitation to the protection scope of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several deformations and improvements can still be made, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims

1. An exercise bike, comprising a base and a frame rotatably arranged on the base in the front-rear direction, wherein the bottom end of the frame has a front connection end and a rear connection end located on both sides of its hinge point, characterized in that, An elastic buffer element is provided between the rear connection end and the base. A pitching adjustment assembly is provided on the base. The pitching adjustment assembly includes a lead screw, a driving block, an adjustment connecting rod, and a driving motor. The lead screw is rotatably arranged on the base. The driving block is slidably arranged on the base. The lead screw passes through the driving block and is in screw drive cooperation with it. Positioning blocks capable of locking with the base are provided on both sides of the driving block. When the lead screw rotates, the positioning blocks unlock from the base and then the driving block moves. The two ends of the adjustment connecting rod are respectively in transmission connection with the front connection end and the driving block. The driving motor is arranged on the base, and the output shaft of the driving motor is in transmission connection with the lead screw.

2. A spinning bike according to claim 1, characterized in that, A fixing plate is provided on the base. Engaging grooves arranged at equal intervals are provided on the fixing plate. Engaging teeth arranged at equal intervals are provided on the side of the positioning block facing the fixing plate. When the engaging teeth and the engaging grooves are in an engaged state, the driving block locks with the base.

3. A spinning bike according to claim 1 or 2, characterized in that, An installation groove is provided in the driving block. An internal thread ring coaxial with the lead screw is provided in the installation groove. An electromagnetic coil is provided at one end of the internal thread ring. One end of the positioning block has a connecting arm extending into the installation groove. Transmission columns distributed along the circumferential direction of the internal thread ring are provided on the end face of the internal thread ring. Transmission connecting rods with their ends rotatably connected to them are provided between the transmission columns and the connecting arm. When the transmission connecting rods are horizontal, the positioning block locks with the base. When the internal thread ring rotates, the transmission connecting rods incline to drive the positioning block to move towards the driving block.

4. A spinning bike according to claim 3, wherein There are two installation grooves and they are respectively located on both sides of the moving direction of the driving block. A connecting cylinder rotatably connected to the driving block is provided in the driving block. The connecting cylinder is coaxial with the lead screw, and the end of the connecting cylinder is coaxially fixedly connected to the internal thread ring.

5. A spinning bike according to claim 3, characterized in that, A rack capable of moving along the tangential direction of the internal thread ring is provided in the installation groove. Tooth grooves distributed along the circumferential direction of the internal thread ring are provided on the circumferential surface of the internal thread ring. The rack meshes with the tooth grooves. An elastic reset assembly for resetting the rack is also provided in the installation groove. When the internal thread ring rotates, the rack needs to overcome the elastic force of the elastic reset assembly.

6. A spinning bike according to claim 5, characterized in that, The elastic reset assembly includes a smooth rod and an elastic reset element. The smooth rod is horizontally arranged in the installation groove. The smooth rod is perpendicular to the lead screw. A convex seat is provided at the top of the rack. The smooth rod passes through the convex seat and is in sliding cooperation with it. There are two elastic reset elements, and the two elastic reset elements are sleeved on the smooth rod and are located on both sides of the convex seat.

7. A spinning bike according to claim 1 or 2, characterized in that, A guide rod extending along the length direction of the base is provided in the base. A guide block is provided at the bottom end of the driving block. The guide rod passes through the guide block and is in sliding cooperation with it.

8. A spinning bike according to claim 1 or 2, characterized in that, A hinge seat is provided on the base. The bottom end of the vehicle frame is provided with a chassis forming an obtuse angle. The chassis has a front arm and a rear arm. A hinge shaft is provided between the front arm and the rear arm. The front arm is rotatably connected to the adjustment connecting rod. The rear arm is rotatably connected to the elastic buffer element. The hinge shaft is rotatably connected to the hinge seat.

9. A spinning bike according to claim 8, characterized in that, A reinforcing plate extending in the horizontal direction is provided between the front arm and the rear arm, and the reinforcing plate is higher than the hinge shaft.

10. A spinning bike according to claim 1, characterized in that, A damping wheel is provided on the vehicle frame, and an angle sensor is provided at the hinge of the vehicle frame. When the vehicle frame tilts backward, the rotational damping of the damping wheel increases, and when the vehicle frame tilts forward, the rotational damping of the damping wheel decreases.

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