Resistance adjusting mechanism of exercise bicycle

Abstract

The utility model discloses an exercise bicycle resistance adjusting mechanism which comprises a base, a shell is fixedly installed on the base, a roller is arranged in the shell, a screw rod is included, a screw hole in threaded connection with the screw rod is formed in the shell, a circular groove is formed in one end of the screw rod, a friction block is arranged in the circular groove in a sliding mode, and the friction block is connected with the roller. An elastic piece is arranged between the friction block and the circular groove, and a driving piece used for driving the friction block to slide relative to the screw rod is arranged on the screw rod. When the rotation resistance of the roller needs to be increased, a screw rod is manually rotated, the screw rod is matched with a screw hole, the screw rod moves towards the interior of the shell and then drives a friction block to move together, the friction block always makes contact with the circumferential side face of the roller, and therefore when the screw rod moves towards the direction of the roller, an extrusion elastic piece and a second spring are compressed, and the rotation resistance of the roller is increased. The internal elastic potential energy of the elastic piece is increased, so that the pressure between the friction block and the roller is increased, namely the friction force between the friction block and the roller is increased.

Description

Technical Field

[0001] The utility model relates to the technical field of fitness exercise bikes, and particularly relates to a resistance adjusting mechanism for a fitness exercise bike. Background Art

[0002] A fitness exercise bike is an in-situ cycling exercise equipment and is an aerobic exercise that can exercise most of the muscles of the whole body. There are generally two types. One is a cycling fitness exercise bike with a seat and a handlebar, which can be used for sitting and exercising; the other is a portable fitness bike without a seat and a handlebar.

[0003] Among them, the portable fitness bike has removed some functions, thus reducing many components. The overall weight is lighter, which is convenient for carrying and moving. Its usage method is to place both feet on the pedals and drive the pedals to perform circular motion through the strength of the leg muscles, thereby driving the rollers to rotate. Currently, the portable fitness bikes in use can basically adjust the resistance of the rollers through an adjusting screw rod fixed on the frame. However, during the exercise process, when the resistance of the rollers changes randomly under different resistances, it has a better exercise effect on fitness people and consumes more muscle energy, but the simple adjusting screw rod is difficult to operate. Summary of the Utility Model

[0004] In order to solve at least one technical problem mentioned in the background art, the purpose of the utility model is to provide a resistance adjusting mechanism for a fitness exercise bike, which is convenient for adjusting the resistance of the rollers during the exercise process.

[0005] To achieve the above purpose, the utility model provides the following technical solution: A resistance adjusting mechanism for a fitness exercise bike, including a base, an outer shell is fixedly installed on the base, a roller is arranged inside the outer shell, a pedal is arranged on the side of the roller shaft, a resistance adjusting mechanism is arranged on the outer shell, the resistance adjusting mechanism includes a screw rod, a threaded hole threadedly connected with the screw rod is arranged on the outer shell, a circular groove is opened at one end of the screw rod, a friction block is slidably arranged in the circular groove, an elastic member is arranged between the friction block and the circular groove, and a driving member for driving the friction block to slide relative to the screw rod is arranged on the screw rod.

[0006] The friction block includes a connecting column slidably arranged in the circular groove, an arc-shaped block abutted against the roller is fixedly installed on the connecting column, and an annular groove for inserting the arc-shaped block is opened on the roller.

[0007] The driving member includes a connecting rod slidably arranged on the connecting column, a first through groove is opened in the connecting column, a second through groove for the connecting rod to pass through is opened in the screw rod, one end of the connecting rod is located outside the outer shell, an installation groove is opened in the connecting column, and a pressing plate is fixedly installed on the circumferential side of the connecting rod and located in the installation groove.

[0008] A first spring is fixedly installed between the pressing plate and the inner wall of the placement groove. The first spring is located between the pressing plate and the roller, and the first spring is in a compressed state. A through hole communicating with the first through groove is formed in the arc-shaped block. In the initial state, the end of the connecting rod close to the roller is located inside the friction block.

[0009] The elastic member includes a second spring fixedly installed on the friction block. A ring-shaped block is fixedly installed on the side of the second spring away from the friction block, and the ring-shaped block abuts against the inner wall of the circular groove.

[0010] A pressing cap is fixedly installed on the side of the connecting rod away from the roller.

[0011] Compared with the prior art, the beneficial effects of the present utility model are as follows: When it is necessary to increase the rotational resistance of the roller, manually rotate the screw. The screw cooperates with the screw hole, so that the screw moves towards the inside of the housing, and then drives the friction block to move together. Among them, the friction block always contacts the circumferential side surface of the roller. Therefore, when the screw moves towards the roller, the elastic member will be squeezed, the second spring will be compressed, increasing the elastic potential energy inside the elastic member, and further increasing the pressure between the friction block and the roller, that is, increasing the friction force between the friction block and the roller. When it is necessary to reduce the rotational resistance of the roller, reverse the screw. After the initial resistance adjustment is completed, the pressure between the friction block and the roller is controlled by the driving member, so that during the movement process, the resistance of the roller is changed, which is beneficial to exercise. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 is a schematic diagram of the overall structure of the present utility model;

[0013] Figure 2 is a schematic diagram of the resistance adjustment mechanism of the present utility model;

[0014] Figure 3 is a partial cross-sectional view of the resistance adjustment mechanism of the present utility model.

[0015] In the figure: 1, base; 2, housing; 3, roller; 31, annular groove; 4, foot pedal; 5, resistance adjustment mechanism; 6, screw; 7, screw hole; 8, circular groove; 9, friction block; 91, connecting column; 92, arc-shaped block; 10, elastic member; 101, second spring; 102, ring-shaped block; 11, driving member; 111, connecting rod; 112, first through groove; 113, second through groove; 114, placement groove; 115, pressing plate; 116, first spring; 117, through hole; 12, pressing cap. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0016] The technical solutions in the embodiments of the present utility model will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0017] Please refer to Figure 1 , this embodiment provides a resistance adjustment mechanism for a fitness exercise bike, including a base 1, on which a housing 2 is fixedly installed. A roller 3 is arranged inside the housing 2, a foot pedal 4 is arranged on the side of the roller 3 shaft, and a resistance adjustment mechanism 5 is arranged on the housing 2.

[0018] Place both feet on the foot pedal 4, and drive the foot pedal 4 to perform circular motion through the strength of the leg muscles, thereby driving the roller 3 to rotate. Among them, according to the needs of different exercise populations, the resistance adjustment mechanism 5 applies resistance to the rotation of the roller 3, so that it requires greater force to step on the foot pedal 4, achieving the purpose of adjustment.

[0019] Please refer to Figure 2 and Figure 3 , specifically, the resistance adjustment mechanism 5 includes a screw 6, a threaded hole 7 threadedly connected to the screw 6 is arranged on the housing 2, a circular groove 8 is opened at one end of the screw 6, a friction block 9 is slidably arranged in the circular groove 8, an elastic member 10 is arranged between the friction block 9 and the circular groove 8, and a driving member 11 for driving the friction block 9 to slide relative to the screw 6 is arranged on the screw 6.

[0020] Among them, the elastic member 10 includes a second spring 101 fixedly installed on the friction block 9, and an annular block 102 is fixedly installed on the side of the second spring 101 away from the friction block 9, and the annular block 102 abuts against the inner wall of the circular groove 8.

[0021] When it is necessary to increase the rotational resistance of the roller 3, manually rotate the screw 6, and the screw 6 cooperates with the threaded hole 7, so that the screw 6 moves towards the inside of the housing 2, and then drives the friction block 9 to move together. Among them, the friction block 9 always contacts the circumferential side of the roller 3. Therefore, when the screw 6 moves towards the roller 3, the elastic member 10 will be compressed, the second spring 101 will be compressed, increasing the elastic potential energy inside the elastic member 10, and then increasing the pressure between the friction block 9 and the roller 3, that is, increasing the friction force between the friction block 9 and the roller 3. When it is necessary to reduce the rotational resistance of the roller 3, reverse the screw 6. After the initial resistance adjustment is completed, the driving member 11 is used to control the pressure between the friction block 9 and the roller 3, so as to change the resistance of the roller 3 within a small range.

[0022] Since the circumferential side of the roller 3 is an arc surface, in order to increase the contact area between the friction block 9 and the roller 3 and more sensitively adjust the resistance of the roller 3, the friction block 9 includes a connecting column 91 slidably arranged in the circular groove 8, and an arc-shaped block 92 abuting against the roller 3 is fixedly installed on the connecting column 91. The arc surface of the arc-shaped block 92 is coaxial with the circumferential side of the roller 3.

[0023] Since there is also friction between the connecting column 91 and the circular groove 8, during the rotation of the screw 6, the friction block 9 may be driven to rotate. To prevent the rotation of the friction block 9, a circular groove 31 for inserting the arc-shaped block 92 is provided on the roller 3. Through the interaction force between the arc-shaped block 92 and the inner wall of the circular groove 31, the rotation of the friction block 9 is blocked.

[0024] During the movement process, under different resistances, when the resistance of the roller 3 changes randomly, it has a better exercise effect on fitness people and the muscle energy consumption is relatively large.

[0025] Please refer to Figure 2 and Figure 3 For the convenience of the exerciser to adjust the resistance value within a small range in the already adjusted resistance stage. The driving member 11 includes a connecting rod 111 slidably arranged on the connecting column 91. A first through groove 112 is provided in the connecting column 91, and a second through groove 113 for the connecting rod 111 to pass through is provided in the screw 6. One end of the connecting rod 111 is located outside the housing 2. An installation groove 114 is provided in the connecting column 91, and a pressing plate 115 is fixedly installed on the circumferential side of the connecting rod 111 and located in the installation groove 114.

[0026] In order to facilitate the exerciser to adjust the connecting rod 111, a pull rope can be installed on the connecting rod 111. As the exerciser steps on it, the hand pulls the pull rope. The pull rope pulls the connecting rod 111, and the connecting rod 111 drives the connecting column 91 to have a tendency to move away from the roller 3 through the pressing plate 115. Thus, part of the elastic force of the elastic member 10 is dispersed to the pull rope, so that the pulling force between the friction block 9 and the roller 3 is reduced, and thus the friction force received by the roller 3 is reduced. Due to the instability of the manual hand pulling force, the friction force received by the roller 3 is also in a changing state, so as to realize the small-range adjustment of the resistance size under different-stage resistances.

[0027] Please refer to Figure 2 and Figure 3, wherein when the rotation speed of the roller 3 is too fast, in order to increase the resistance of the roller 3 in a short time and make the roller 3 stop quickly. A first spring 116 is fixedly installed between the pressing plate 115 and the inner wall of the annular groove 31. The first spring 116 is located between the pressing plate 115 and the roller 3, and the first spring 116 is in a compressed state. A through hole 117 communicating with the first through groove 112 is formed in the arc-shaped block 92. In the initial state, the end of the connecting rod 111 close to the roller 3 is located inside the friction block 9, and a pressing cap 12 is fixedly installed on the side of the connecting rod 111 away from the roller 3.

[0028] By manually pressing the pressing cap 12 on the connecting rod 111, the connecting rod 111 drives the pressing plate 115 to squeeze the first spring 116. At the same time, the connecting rod 111 extends out of the friction block 9 and contacts the roller 3 through the first through groove 112 and the through hole 117, thereby increasing the resistance received by the roller 3 and making the roller 3 stop rotating quickly.

[0029] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, it is intended to embrace all changes falling within the meaning and scope of the equivalent elements of the claims in the present invention.

Claims

1. A resistance adjustment mechanism for a fitness bicycle, comprising a base (1), a housing (2) fixedly mounted on the base (1), a roller (3) arranged inside the housing (2), a pedal (4) arranged on the side of the axis of the roller (3), and a resistance adjustment mechanism (5) arranged on the housing (2), characterized in that: The resistance adjustment mechanism (5) comprises a screw rod (6), the housing (2) is provided with a screw hole (7) threadedly connected to the screw rod (6), one end of the screw rod (6) is provided with a circular groove (8), a friction block (9) is slidably arranged in the circular groove (8), an elastic member (10) is arranged between the friction block (9) and the circular groove (8), and the screw rod (6) is provided with a driving member (11) for driving the friction block (9) to slide relative to the screw rod (6).

2. The resistance adjustment mechanism for an exercise bike according to claim 1, characterized in that: The friction block (9) comprises a connecting column (91) slidably arranged in a circular groove (8), an arc block (92) abutting against the roller (3) is fixedly mounted on the connecting column (91), and an annular groove (31) for inserting the arc block (92) is provided on the roller (3).

3. The resistance adjustment mechanism for an exercise bike according to claim 2, characterized in that: The driving member (11) comprises a connecting rod (111) slidably arranged on a connecting column (91); a first through slot (112) is provided in the connecting column (91); a second through slot (113) for the connecting rod (111) to pass through is provided in the screw rod (6); one end of the connecting rod (111) is located outside the housing (2); a mounting slot (114) is provided in the connecting column (91); and a pressure plate (115) is fixedly installed on a peripheral side of the connecting rod (111) and in the mounting slot (114).

4. The resistance adjustment mechanism for an exercise bike according to claim 3, characterized in that: A first spring (116) is fixedly installed between the pressure plate (115) and the inner wall of the placement groove (114); the first spring (116) is located between the pressure plate (115) and the roller (3); the first spring (116) is in a compressed state; a through hole (117) connected to the first through groove (112) is provided on the arc block (92); in an initial state, an end of the connecting rod (111) close to the roller (3) is located inside the friction block (9).

5. The resistance adjustment mechanism for an exercise bike according to claim 4, characterized in that: The elastic member (10) comprises a second spring (101) fixedly mounted on the friction block (9); an annular block (102) is fixedly mounted on a side of the second spring (101) away from the friction block (9); the annular block (102) abuts against an inner wall of the circular groove (8).

6. The resistance adjustment mechanism for an exercise bike according to claim 5, characterized in that: A pressure cap (12) is fixedly mounted on the side of the connecting rod (111) away from the roller (3).

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