CN218420824U - One-way brake and strength type fitness equipment - Google Patents

Abstract

The utility model provides a one-way brake and strength type fitness equipment. A one-way brake comprises a brake spring bolt, a brake groove, a positioning pin, a limiting column and a power-off electromagnet which are fixed on the same plane, wherein the power-off electromagnet matched with the rotation action of a rotating piece controls the brake spring bolt to be embedded into or separated from the mechanical structure of the brake groove, so that the braking and unlocking of the rotating piece are realized; the structure is simple and reliable, the miniaturization and lightweight design of the instrument are facilitated, and meanwhile, the energy efficiency of the body builder is improved. A strength type body builder with the one-way brake further comprises a mounting base, a motor, a cable disc, a rope, a training acting element, a power supply, a controller, a magnetic absolute position encoder, an energy recoverer, a stress sensor and an intelligent unit; the motor is used as a resistance source, so that the safety performance is good, the energy utilization rate is high, the intelligent interaction between the body builder and a user is realized, and the market prospect is good.

Description

One-way brake and strength type fitness equipment

Technical Field

The utility model belongs to the body-building apparatus field, concretely relates to one-way brake and strength type fitness equipment.

Background

In a new age, the fitness of the public becomes one of the living ways in which the public pursues more health and fullness. Currently, the most common exercise equipment is the strength training device. Adopt the motor as the generating device of resistance, the strength type fitness equipment that utilizes current motor moment of torsion controllability becomes wherein representative product, and it combines compound fitness equipment structure, realizes that the size of power can change according to user's in-service use needs, also changes intelligent control, the long-range human-computer interaction that realizes the fitness equipment for user's body-building is experienced abundantly, and the effect is also better, and the structure is light, and convenient travel carries.

The power body-building device using the motor as the resistance source has great challenges in the industry at present how to control the motor in particular so that the motor can be well applied to the intelligent power body-building device. The sensitivity, reliability and high efficiency of brake control are important; namely, the brake is arranged on the output end of the motor or the force acting piece fixedly connected with the output end of the motor, so that the brake locks or unlocks the motor and the force acting piece according to the control signal of the control unit or the power on-off signal of the power supply, the resistance of the motor is output or closed by the fitness equipment according to the requirement of a user, safety accidents caused by misoperation of the user are prevented, and accidents such as force loss of the user and emergency faults need to be dealt with in time. According to the use characteristics of the motor type body builder, the brake only needs to brake in one direction.

In the prior art, most of motor type strength exercise machines adopt commercially available electromagnetic brakes, and the electromagnetic brakes brake the motor type strength exercise machines by means of large friction force generated by the fit of a built-in brake pad and a fixed friction surface. Most of the brake shoes only need to be attached to the fixed friction surface after being electrified for a short time to generate braking in use, and the brake shoes are separated from the fixed friction surface to release the rotating shaft after being electrified. Such brakes are therefore used in exercise machines, with several disadvantages: 1. the braking force is limited by the size of the brake (the larger the braking force, the larger the size of the brake), which is not beneficial to the wide range and miniaturization design of the force of the body-building machine; 2. the brake pad is seriously abraded due to long-time friction, and the braking reliability is poor; 3. the electromagnetic brake installed on the motor type strength fitness equipment has the opposite use requirement to the conventional use requirement, namely the electromagnetic brake needs to be braked in a power-off mode and released in a power-on mode, so that the electromagnetic brake needs to be electrified for a long time, a large amount of heat is generated, and the safety is reduced.

SUMMERY OF THE UTILITY MODEL

Aiming at the defects of the prior art, the utility model provides a one-way brake and a strength type body builder; the one-way brake adopts a mechanical structure that a power-off electromagnet matched with the rotation action of the rotating piece controls the brake lock tongue to be embedded into or separated from the brake groove, so that the braking and unlocking of the rotating piece are realized, the braking is reliable, the safety and the energy efficiency are high, and the miniaturization and lightweight design of small instruments such as a strength type body builder and the like are facilitated; the strength type body builder adopts the motor as a resistance source, not only realizes the intelligent interaction between the body builder and a user, but also has compact structure, safety and energy conservation.

In order to achieve the above purpose, the utility model provides a following technical scheme does:

a one-way brake is characterized in that the one-way brake is used for braking a rotating part and comprises a braking lock tongue, a braking groove, a limiting column, a power-off electromagnet and a positioning pin; the brake groove is positioned on the end face of the rotating part and does not move relative to the rotating part; the braking spring bolt, the limiting column, the power-off electromagnet and the positioning pin are arranged on a plane structure which is parallel to the end face of the rotating part and is fixed; the upper side surface of the brake lock tongue is a plane, the right end of the brake lock tongue is provided with a positioning hole, and the left end of the brake lock tongue is provided with a tongue body protruding downwards; the rear side surface of the bolt body is vertical to the upper side surface of the braking bolt, and an included angle between the front side surface and the rear side surface is an acute angle and is chamfered with a round angle; the positioning hole is fixed on the plane structure by a positioning pin, the braking lock tongue can rotate around the positioning pin, and the horizontal distance between the center of the positioning hole and the center of the rotating part is less than 0.5-2mm from the back side of the tongue body; the braking grooves are uniformly distributed on the end face of the rotating part and are in a splayed shape with outward openings along the circumference, the width and the height of the braking grooves are larger than those of the tongue body, two side faces of the braking grooves are perpendicular to the end face of the rotating part, and the first side face is a plane passing through the center of the rotating part; the limiting column is fixedly arranged on the plane structure, is tangent to the upper side surface of the brake lock tongue and is used for limiting the rotation angle of the brake lock tongue; the horizontal distance between the center of the rotating piece and the center of the limiting column is larger than that between the center of the rotating piece and the center of the positioning hole of the braking lock tongue; the power-off electromagnet is fixed on the plane structure and positioned on the upper side of the braking spring bolt and used for cooperating with the rotating action of the rotating piece to control the braking spring bolt to be separated from or fall into the braking groove.

Preferably, the braking groove (12) is a groove structure formed on the rotating member.

A strength type body builder with the one-way brake is characterized by further comprising a mounting base, a motor mounting seat, a motor, a cable disc, a rope, a training acting element, a power supply and a controller; the mounting base supports and fixes the strength type body builder; the motor mounting seat is provided with a molding cavity, and the left side and the right side of the cavity are respectively provided with a coaxial braking hole and a motor shaft hole; the motor is a resistance source for providing training resistance for the strength type body builder, is fixedly arranged on the motor mounting seat and is positioned on the right side outside the cavity, and an output shaft of the motor penetrates through the motor shaft hole to be fixedly connected with the first end face on the right side of the cable disc; the cable disc is arranged in the cavity, the left side of the cable disc is supported on the brake hole through a bearing, and a second end face corresponding to the left side of the cable disc protrudes out of the cavity; the one-way brake is used for braking the cable disc; the braking spring bolt, the limiting column and the power-off electromagnet are arranged on a motor mounting seat; the number of the braking grooves is at least two, and the braking grooves are uniformly distributed on the second end surface of the cable disc so as to adapt to the use requirements of ropes with different lengths; the rope is wound on the rope disc, one end of the rope is fixedly connected with the rope disc, and the other corresponding end of the rope is connected with the training acting piece; the rope penetrates out of a hole formed in the front side of the cavity; the power supply is respectively used for supplying power to the motor, the controller and the power-off electromagnet and is fixedly arranged on the rear side of the cavity; the controller is respectively connected with the motor and the power-off electromagnet and is used for controlling the one-way brake to unlock or lock and controlling the output power of the motor.

Preferably, the strength type body builder is characterized by further comprising a magnetic absolute position encoder for measuring the rotation information of the output shaft of the motor; the motor is provided with two coaxial output shafts, a first output shaft of the motor is fixedly connected with the cable disc, a magnet end of a magnetic absolute position encoder is arranged on the end surface of a second output shaft of the motor, and a sensing end of the magnetic absolute position encoder is arranged on the controller; the controller is fixedly connected to the end face of the second output shaft of the motor at the side corresponding to the second output shaft.

Preferably, the strength type body builder is characterized by further comprising an energy recoverer for collecting current additionally generated when the motor rotates, wherein the energy recoverer is connected with the power supply.

Preferably, the strength type body builder is characterized by further comprising a stress sensor for collecting the tension information of a user; the stress sensor is in a tetragonal shape and is arranged in a manner of being superposed with left and right symmetrical shafts of the mounting base, the motor mounting seat and the cable disc; the upper end face and the lower end face of the stress sensor are both concave, the rear end of the lower end face of the stress sensor is fixed on the mounting base through a threaded fastener, and the front end of the upper end face of the stress sensor is fixed on the motor mounting base through a threaded fastener.

Preferably, the strength type fitness equipment further comprises an intelligent unit; the intelligent unit comprises a wireless communication module, an authentication module and a user interaction program which are communicated with each other; the wireless communication module is used for information transmission between the strength type fitness equipment and user mobile equipment or/and a cloud server or/and a computer; the authentication module is used for identifying the wireless communication module and a user obtains the connection authorization of the wireless communication module; the user interaction program is a mobile phone APP or/and a small program and is used for information interaction and information display between the mobile device of the user and the strength type fitness equipment or/and the cloud server or/and the computer.

Further preferably, a limit bolt is fixedly mounted on the mounting base and used for limiting the deformation amplitude of the stress sensor.

Further preferably, the authentication module includes a two-dimensional code or/and an NFC tag, and the two-dimensional code and the NFC tag load wireless communication module ID information.

Further preferably, the wireless communication module comprises a bluetooth module, and the bluetooth module is fixedly installed at the outer side of the motor installation seat.

Compared with the prior art, the beneficial effects of the utility model are that:

1. the one-way brake of the utility model adopts a mechanical structure, has simple structure, is not limited by the braking range in size, and is beneficial to miniaturization design; the brake breaks through the traditional friction type brake, has high energy efficiency and reliable braking, and improves the safety performance of small-sized instruments such as strength type fitness equipment.

2. According to the strength type body builder, the motor is used as a resistance source, the magnetic absolute position encoder and the stress sensor are arranged as control resistance feedback elements, and the control precision of the motion resistance of the strength type body builder is improved; the intelligent unit is arranged, so that intelligent interaction between the strength type fitness equipment and a user is realized; the energy recoverer is arranged, so that the energy utilization rate and the safety of the strength type body builder are improved.

Drawings

Fig. 1 is a structural schematic diagram of an unlocking state of the one-way brake according to the embodiment of the present invention;

fig. 2 is a structural schematic diagram of a locking state of the one-way brake according to the embodiment of the present invention;

FIG. 3 is a right side view of the strength exercise machine according to the embodiment of the present invention;

fig. 4 is a rear sectional view of the strength exercise machine according to the embodiment of the present invention;

fig. 5 is a left cross-sectional view of the strength exercise machine according to the embodiment of the present invention;

in the figure: 11. the braking bolt comprises a braking bolt body, 111, an upper side face of the braking bolt body, 112, a braking bolt positioning hole, 113, a braking bolt body, 1131, a rear side face of the bolt body, 1132, a front side face of the braking bolt body, 12, a braking groove, 121, a first side face of the braking groove, 13, a limiting column, 14, a power-off electromagnet, 15, a positioning pin, 201, a mounting base, 202, a motor mounting seat, 2021, a bottom plate, 2022, a threaded fastener, 2023, a first side plate, 2024, a connecting shaft, 2025, a second side plate, 203, a bearing, 204, a motor, 205, a cable disc, 206, a cable, 207, a training action piece, 208, a power supply, 209, a controller, 210, a magnetic absolute position encoder, 211, an energy recoverer, 212, a stress sensor, 213, a limiting bolt, 214 and a Bluetooth module.

Detailed Description

In order to make the technical means, creation features, achievement purposes and functions of the present invention easy to understand, the following embodiments are specifically illustrated with reference to the accompanying drawings, and it should be noted that the description of these embodiments is used to help understanding the present invention, but does not limit the present invention.

It should be noted that in the description of the present invention, the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, which are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention; the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance, and furthermore, unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "connected" are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. When two elements are "fixedly connected" or "pivotally connected," the two elements may be directly connected or intervening elements may also be present. In contrast, when an element is referred to as being "directly on" another element, there are no intervening elements present. The fastening or fixing connection mode can be a screw connection or a welding or riveting or a plug connection or a connection through a third component. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "or/and" includes any and all combinations of one or more of the associated listed items.

As shown in fig. 1, the one-way brake of the present invention comprises a braking tongue 11, a braking groove 12, a limiting column 13, a power-off electromagnet 14, and a positioning pin 15, which are used for braking a rotating member; the brake groove 12 is positioned on the end surface of the rotating piece; the braking bolt 11, the limiting column 13, the power-off electromagnet 14 and the positioning pin 15 are arranged on a plane structure which is parallel to the end face of the rotating part and is fixed;

the upper side 111 of the brake bolt 11 is a plane, the right end is provided with a positioning hole 112, and the left end is provided with a bolt body 113 protruding downwards; the back surface 1131 of the tongue body is perpendicular to the upper surface 111 of the brake lock tongue, and an included angle between the front surface 1132 and the back surface 1131 is an acute angle and is rounded; the positioning hole is arranged on the plane structure by a positioning pin 15, the shaft of the positioning hole is fixed but the rotation freedom degree of the positioning hole is not limited, and the brake bolt rotates around the positioning pin 15; the positioning pin 15 can be a threaded fastener such as a bolt with a polished rod, a screw or other shaft parts; the horizontal distance between the center of the positioning hole and the center of the rotating piece is smaller than the distance between the positioning hole and the back side surface 1131 of the bolt body by 0.5-2mm, so that the brake bolt can smoothly fall into the brake groove during braking.

The number of the braking grooves 12 is at least two, so as to adapt to the use requirements of ropes with different lengths, and the braking grooves are uniformly distributed on the end face of the rotating part, and the specific structure of the braking grooves can be a groove structure arranged on the rotating part or one or more parts which are fixedly connected on the end face of the rotating part and provided with grooves; the braking groove 12 is in a shape of a figure eight with an outward opening along the circumference, the width and the height of the braking groove are both larger than those of the tongue body 113, two side surfaces of the braking groove are perpendicular to the end surface of the rotating part, wherein the first side surface 121 is a plane passing through the center of the rotating part, and the characteristic is also to ensure that the braking tongue smoothly falls into the braking groove during braking.

The limiting column 13 is fixedly installed on the plane structure, is tangent to the upper side surface of the braking bolt 11 and is used for limiting the rotation angle of the braking bolt, so that the limiting column is installed at the rear end of the rotation center of the braking bolt, namely the horizontal distance between the center of the rotating part and the center of the limiting column is larger than the horizontal distance between the center of the rotating part and the center of the braking bolt positioning hole 112.

The power-off electromagnet 14 is fixed on the plane structure and is positioned on the upper side of the brake bolt 11, and is used for controlling the brake bolt to be separated from or fall into the brake groove 12 by matching with the rotation action of the rotating member.

The one-way brake adopts a simple mechanical structure, the size of the one-way brake is not limited by braking force any more, the one-way brake can be freely adjusted according to design requirements in a large range, the braking is safe and reliable, the one-way brake is different from the traditional friction type one-way brake, heat is not generated in the braking process, the energy efficiency is improved, and the damage to electric devices such as an instrument control panel and the like is reduced. The one-way brake is applied to the strength type body builder, so that the miniaturization design of the strength type body builder is facilitated, and the safety performance of the strength type body builder is effectively improved.

The utility model discloses a strength type fitness equipment with above-mentioned one way brake, as shown in fig. 3, fig. 4, fig. 5, still include mounting base 201, motor mount pad 202, motor 204, cable dish 205, rope 206, training effect 207, power 208, controller 209, magnetism absolute position encoder 210, energy recuperation 211, stress sensor 212, intelligent cell.

The mounting base 201 supports and secures the strength exercise machine.

The motor mounting base 202 is formed by fixedly connecting a bottom plate 2021, a first side plate 2023, a connecting shaft 2024 and a second side plate 2025 to form a cavity, and the left side and the right side of the cavity are respectively provided with a coaxial braking hole (on the second side plate) and a motor shaft hole (on the first side plate).

The motor 204 is a resistance source for providing training resistance for the strength type fitness equipment, is fixedly arranged on the second side plate 2025 of the motor mounting seat and is positioned outside the cavity body; the motor 204 has two coaxial output shafts, and the first output shaft thereof is fixedly connected with the cable disc 205; the end face of a second output shaft is provided with a magnet end of a magnetic absolute position encoder 210, and a sensing end of the magnetic absolute position encoder 210 is arranged on a controller 209; the controller 209 is fixedly connected to the end face of the side corresponding to the second output shaft of the motor; the magnetic absolute position encoder 210 is used to measure rotational information of the motor output shaft.

The cable disc 205 is installed in the cavity, the left side of the cable disc is supported on the braking hole of the first side plate 2023 of the motor installation seat through the bearing 203, and the corresponding second end surface of the left side of the cable disc protrudes out of the cavity.

A rope 206 wound on the rope disc 205, one end of the rope 206 is fixedly connected with the rope disc 205, and the other corresponding end of the rope 206 is connected with the training acting element 207; the rope passes through a hole arranged at the front side of the cavity.

The one-way brake is used for braking the cable disc 205; the braking bolt 11, the limiting column 13 and the power-off electromagnet 14 are arranged on the motor mounting seat 202; the number of the braking grooves is at least two, and 4 braking grooves are evenly distributed on the second end face of the cable disc as shown in figure 1.

The one-way brake is mainly used for avoiding safety accidents caused by improper operation of a user under the non-working state of the body builder or locking the cable disc of the body builder when the user finishes sports. When a user applies force to pull the rope outwards, the rotating piece-rope disc and the motor rotate anticlockwise (or clockwise according to the structure), and the rope is recovered by driving the rotating piece-rope disc to rotate clockwise (or anticlockwise according to the structure) through the motor, so that the fitness equipment only needs to ensure the braking performance for completing the anticlockwise movement of the rope disc.

The locking and unlocking processes of the one-way brake are as follows:

when locking and braking are needed, the power-off electromagnet 14 is electrified for a short time, the magnetic force disappears, the brake bolt 11 rotates around the positioning pin 15 to fall under the action of gravity, and the rear end of the brake bolt 11 is limited by the limiting column 13, so that the brake bolt can only fall to a horizontal state; at the moment, the rotating piece-cable disc rotates anticlockwise, when the lock tongue falls into the brake groove, the brake groove is acted by the brake force of the lock tongue, and then the motor fixedly connected with the brake groove is fed back by the brake force; the motor 204 is fed back by the braking force, the lock tongue is determined to fall into the braking groove, and the motor 204 is powered off after the brake completes the locking action; because the motor has larger damping from the speed reducer, the motor cannot rotate automatically after power failure, and the braking reliability of the one-way brake to the rotating member-cable disc 205 is guaranteed. The locked state of the one-way brake is shown in fig. 2.

When the cable disc is unlocked, the motor is electrified to drive the rotating piece-cable disc to rotate clockwise, and the first side surface of the braking groove 12 pushes the braking bolt 11 to rotate around the positioning pin so as to screw out the braking bolt from the braking groove of the cable disc 12; at this time, the power-losing type electromagnet 14 is not electrified, the magnetic force is recovered, the brake bolt 11 is contacted with the power-losing type electromagnet 14 under the inertia effect, and is attracted and kept still by the power-losing type electromagnet 14 through the magnetic force, the unlocking of the rotating member, namely the cable disc, is completed, and then the motor can drive the rotating member to rotate freely.

And the power supply 208 is used for respectively supplying power to the motor 204, the controller 209 and the power-off electromagnet 14 and is fixedly arranged on the rear side of the cavity.

The controller 209 is respectively connected with the motor 204, the power-off electromagnet 14, the stress sensor 212, the magnetic absolute position encoder 210 and the intelligent unit, and is used for controlling the one-way brake to unlock or lock, collecting information collected by the stress sensor 212 and the magnetic absolute position encoder 210, receiving and feeding back an instruction of the intelligent unit, and controlling the output power of the motor 204; the energy recovery device 211 is connected with the power supply 208 and the controller for collecting the current additionally generated when the motor rotates.

The stress sensor 212 is used for collecting user tension information, as shown in fig. 5, the stress sensor 212 is in a tetragonal shape, and is installed in a manner of being overlapped with the left and right symmetrical axes of the installation base 201, the motor installation base 202 and the cable disc 205; the upper end face and the lower end face of the stress sensor 212 are both concave, the rear end of the lower end face of the stress sensor is fixed on the mounting base 201 through a threaded fastener, and the front end of the upper end face of the stress sensor is fixed on the motor mounting base plate 2021 through a threaded fastener 2022. And a limiting bolt 213 is fixedly arranged on the mounting base and used for limiting the deformation amplitude of the stress sensor 212. The stress sensor can deform with a certain amplitude along with the motor mounting seat, so that the deformation of the motor mounting seat reflecting the pulling force of a user acting on the force output unit can be measured, and the generated stress data can be used for correcting the output torque of the motor and used as a judgment basis for force loss or emergency failure of the user.

The intelligent unit comprises a wireless communication module, an authentication module and a user interaction program which are communicated with each other; the wireless communication module is used for information transmission between the intelligent strength type fitness equipment and user mobile equipment or/and a cloud server or/and a computer; the authentication module is used for identifying the wireless communication module and the user obtains the connection authorization of the wireless communication module; the user interaction program is a mobile phone APP or/and a small program and is used for information interaction and information display between the mobile device of the user and the strength type fitness equipment or/and the cloud server or/and the computer. The authentication module comprises a two-dimensional code or/and an NFC label, and the two-dimensional code and the NFC label are loaded with ID information of the wireless communication module and are pasted on the surface of the strength type fitness equipment; the wireless communication module comprises a Bluetooth module 214 which is fixedly arranged outside the motor mounting seat.

The above embodiments are preferred embodiments of the present invention, and are not intended to limit the scope of the present invention, and various modifications and changes can be made by those skilled in the art within the scope of the appended claims without inventive work.

Claims (10)

1. A one-way brake is characterized in that the one-way brake is used for one-way braking of a rotating piece and comprises a braking bolt (11), a braking groove (12), a limiting column (13), a power-off electromagnet (14) and a positioning pin (15);

the brake groove (12) is positioned on the end face of the rotating part and does not move relative to the rotating part; the braking bolt (11), the limiting column (13), the power-off electromagnet (14) and the positioning pin (15) are arranged on a plane structure which is parallel to the end face of the rotating part and is fixed;

the upper side surface (111) of the brake bolt (11) is a plane, the right end of the brake bolt is provided with a positioning hole (112), and the left end of the brake bolt is provided with a bolt body (113) protruding downwards; the back side surface (1131) of the tongue body is vertical to the upper side surface (111) of the brake lock tongue, and an included angle between the front side surface (1132) of the tongue body and the back side surface (1131) of the tongue body is an acute angle and is chamfered with a round angle; the positioning hole (112) is fixed on the plane structure by a positioning pin (15), the braking bolt can rotate around the positioning pin (15), and the horizontal distance between the center of the positioning hole and the center of the rotating piece is less than 0.5-2mm from the distance between the center of the positioning hole and the back side surface (1131) of the bolt body;

the braking grooves (12) are uniformly distributed on the end face of the rotating part, are in a splayed shape with outward openings along the circumference, the width and the height of the braking grooves are larger than those of the tongue body (113), two side faces of the braking grooves are perpendicular to the end face of the rotating part, and the first side face (121) is a plane passing through the center of the rotating part;

the limiting column (13) is fixedly arranged on the plane structure, is tangent to the upper side surface of the brake lock tongue (11) and is used for limiting the rotation angle of the brake lock tongue; the horizontal distance between the center of the rotating piece and the center of the limiting column (13) is larger than that between the center of the rotating piece and the center of the braking bolt positioning hole (112);

the power-off electromagnet (14) is fixed on the plane structure, is positioned on the upper side of the brake lock tongue (11) and is used for cooperating with the rotation action of the rotating piece to control the brake lock tongue to be separated from or fall into the brake groove (12).

2. A one-way brake according to claim 1, wherein said braking groove (12) is a groove structure provided on said rotary member.

3. A strength type exercise machine having a one-way brake according to claim 1 or 2, further comprising a mounting base (201), a motor mounting base (202), a motor (204), a cable disc (205), a cable (206), a training function (207), a power source (208), and a controller (209);

the mounting base (201) supports and fixes the strength type fitness equipment;

the motor mounting seat (202) is provided with a molding cavity, and the left side and the right side of the molding cavity are respectively provided with a coaxial braking hole and a motor shaft hole;

the motor is a resistance source for providing training resistance for the strength type body builder, is fixedly arranged on the motor mounting seat (202) and is positioned on the right side outside the cavity, and an output shaft of the motor penetrates through the motor shaft hole to be fixedly connected with the first end face on the right side of the cable disc (205);

the cable disc is arranged in the cavity, the left side of the cable disc is supported on the brake hole through a bearing (203), and a second end face corresponding to the left side of the cable disc protrudes out of the cavity;

the one-way brake is used for braking the cable disc (205); a braking bolt (11), a limiting column (13) and a power-off electromagnet (14) are arranged on a motor mounting seat (202); the number of the braking grooves is at least two, and the braking grooves are uniformly distributed on the second end surface of the cable disc;

the rope (206) is wound on the rope disc (205), one end of the rope (206) is fixedly connected with the rope disc (205), and the other corresponding end of the rope (206) is connected with the training acting piece (207); the rope penetrates out of a hole formed in the front side of the cavity;

the power supply (208) is used for supplying power to the motor (204), the controller (209) and the power-off electromagnet (14) respectively and is fixedly arranged on the rear side of the cavity;

the controller is respectively connected with the motor (204) and the power-off electromagnet (14) and is used for controlling the one-way brake to be unlocked or locked and controlling the output power of the motor (204).

4. A strength-type exercise machine according to claim 3, further comprising a magnetic absolute position encoder (210) for measuring rotational information of the motor output shaft; the motor (204) is provided with two coaxial output shafts, the first output shaft of the motor is fixedly connected with the cable disc (205), the end surface of the second output shaft of the motor is provided with a magnet end of a magnetic absolute position encoder (210), and the sensing end of the magnetic absolute position encoder (210) is arranged on the controller (209); the controller (209) is fixedly connected to the end face of the corresponding side of the second output shaft of the motor.

5. The strength-type exercise apparatus of claim 3, further comprising a recovery device (211) for collecting an additional current generated when the motor rotates, wherein the recovery device is connected to the power source.

6. A strength exercise machine according to claim 3 further comprising a stress sensor (212) for collecting user tension information; the stress sensor (212) is in a tetragonal shape and is installed with the left and right symmetrical shafts of the installation base (201), the motor installation base (202) and the cable disc (205) in a superposed mode; the upper end face and the lower end face of the stress sensor (212) are both concave, the rear end of the lower end face of the stress sensor is fixed on the mounting base (201) through a threaded fastener, and the front end of the upper end face of the stress sensor is fixed on the motor mounting base (202) through a threaded fastener.

7. The strength-type exercise apparatus of claim 3, further comprising an intelligent unit; the intelligent unit comprises a wireless communication module, an authentication module and a user interaction program which are communicated with each other; the wireless communication module is used for information transmission between the strength type fitness equipment and user mobile equipment or/and a cloud server or/and a computer; the authentication module is used for identifying the wireless communication module and a user obtains the connection authorization of the wireless communication module; the user interaction program is a mobile phone APP or/and an applet and is used for information interaction and information display between the mobile device of the user and the strength exercise machine or/and the cloud server or/and the computer.

8. Force-type fitness machine according to claim 6, wherein a limiting bolt (213) is fixedly mounted on the mounting base (201) for limiting the deformation amplitude of the stress sensor (212).

9. The strength type fitness apparatus of claim 7, wherein the authentication module comprises a two-dimensional code or/and an NFC tag, and the two-dimensional code or the NFC tag carries wireless communication module ID information.

10. The strength exercise machine of claim 7, wherein the wireless communication module comprises a bluetooth module (214) fixedly mounted outside the motor mount.

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