CN113230580A - Resistance transmission mechanism for fitness equipment - Google Patents

Resistance transmission mechanism for fitness equipment Download PDF

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Publication number
CN113230580A
CN113230580A CN202110601067.0A CN202110601067A CN113230580A CN 113230580 A CN113230580 A CN 113230580A CN 202110601067 A CN202110601067 A CN 202110601067A CN 113230580 A CN113230580 A CN 113230580A
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CN
China
Prior art keywords
resistance
winding assembly
gear
planet carrier
bearing
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Pending
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CN202110601067.0A
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Chinese (zh)
Inventor
陈岗
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Beijing Mitao Zhilian Technology Co.,Ltd.
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Xiamen Lingdong Intelligent Technology Co ltd
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Priority to CN202110601067.0A priority Critical patent/CN113230580A/en
Publication of CN113230580A publication Critical patent/CN113230580A/en
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    • AHUMAN NECESSITIES
    • A63SPORTS; GAMES; AMUSEMENTS
    • A63BAPPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B21/00Exercising apparatus for developing or strengthening the muscles or joints of the body by working against a counterforce, with or without measuring devices
    • A63B21/005Exercising apparatus for developing or strengthening the muscles or joints of the body by working against a counterforce, with or without measuring devices using electromagnetic or electric force-resisters

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  • Health & Medical Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Biophysics (AREA)
  • Orthopedic Medicine & Surgery (AREA)
  • General Health & Medical Sciences (AREA)
  • Physical Education & Sports Medicine (AREA)
  • Retarders (AREA)

Abstract

The invention provides a resistance transmission mechanism for fitness equipment, which comprises a resistance source, a planetary gear box, a first winding assembly and a second winding assembly, wherein the planetary gear box adopts a cylindrical gear, the planetary gear box is arranged on an output shaft of the resistance source, the first winding assembly is fixed on an outer ring of the planetary gear box, the second winding assembly is fixed on a planet carrier of the planetary gear box, and the first winding assembly and the second winding assembly can independently rotate and have corresponding reduction ratios relative to an input shaft. The mechanism provides resistance and tension (in the opposite direction to the external force), and when the external force is greater than the force provided by the mechanism, the pull rope is pulled out, and when the external force is less than the force provided by the mechanism, the pull rope is pulled back. When the output shaft continuously outputs torque, the two winding assemblies can simultaneously output torque and have different reduction ratios and output torques, and the diameter difference of the two winding assemblies is designed for compensation, so that the pull rope has equal or approximate tension; compact structure occupies small volume and is convenient for installation.

Description

Resistance transmission mechanism for fitness equipment
Technical Field
The invention belongs to the technical field of fitness equipment, and particularly relates to a resistance transmission mechanism for fitness equipment.
Background
Along with the improvement of living standard of people and the popularization of national fitness equipment, more and more people utilize fitness equipment to exercise bodies. The fitness equipment on the market is various in variety and different in function. Novel intelligent electric resistance training apparatus is gradually entering the market. Aiming at the resistance exercise machine with double handles, a structure of single motor and double wire outlet can be adopted in order to save cost. The conventional solution is to provide resistance by means of a movable pulley block structure cooperating with the motor, and to distribute resistance from one rope to two ropes by means of the movable pulley block, and the structure requires a large space for the movement of the movable pulley, so that the structure occupies a large space, is not easy to install in the exercise apparatus, and makes it difficult to realize a large reduction ratio to amplify the pulling force of the motor.
Patent US10617903B2 discloses a differential mechanism of an exercise machine, which is provided with two winding assemblies with the same diameter and can output torque at the same time, but the differential mechanism is formed by other parts such as a bevel gear, a chain wheel and the like, the bevel gear is difficult to process, and the noise is large. And need synchronous belt drive, the part is more, the structure is comparatively complicated, and required cost is quite high, and hardly realize great reduction ratio moreover.
Disclosure of Invention
In order to solve the problems that the existing resistance transmission mechanism needs to occupy larger space, has large noise, smaller reduction ratio, higher required cost and the like, the application provides the resistance transmission mechanism for the fitness equipment, so as to solve the technical defect problem existing in the existing resistance transmission mechanism.
The invention provides a resistance transmission mechanism for fitness equipment, which comprises a resistance source, a planetary gear box, a first winding assembly and a second winding assembly, wherein the planetary gear box adopts a cylindrical gear, the planetary gear box is arranged on an output shaft of the resistance source, the first winding assembly and the second winding assembly are arranged on the planetary gear box, and the first winding assembly and the second winding assembly can independently rotate.
Preferably, the resistance transmission mechanism further comprises a first pull rope and a second pull rope, wherein the first pull rope is wound on the first winding assembly, and the second pull rope is wound on the second winding assembly. The single arm or the double arms of the exerciser can be exercised by matching the pull rope with the winding assembly.
Preferably, the planetary gear box comprises a sun gear, a planet carrier and an inner gear ring, the sun gear is fixedly connected to an output shaft of the resistance source, the planet gear is meshed with the sun gear, the planet carrier is rotatably covered outside the sun gear and the planet gear, and the inner gear ring is rotatably sleeved on the planet carrier and meshed with the planet gear. Through the cooperation between sun gear, planet wheel, planet carrier and the ring gear, not only can play the differential effect but also can increase the moment of torsion, consequently can increase wire winding assembly's diameter, reduce the winding number of turns of stay cord.
Further preferably, the resistance transmission mechanism further comprises an outer ring and a first bearing, the outer ring is fixedly connected to the inner gear ring, the first bearing is sleeved on the planet carrier and clamped on the inner side of the outer ring, and the first winding assembly is fixedly connected to the outer ring. The arrangement of the first bearing can play a role in restraining the outer ring to only rotate along the axis of the planet carrier and the output shaft, so that the running stability of the planet carrier is ensured, the sliding resistance and the power consumption are low, and the starting is easy.
Further preferably, the resistance transmission mechanism further comprises a second bearing, the second bearing is sleeved on the output shaft and is clamped on the inner side of the planet carrier, and the second winding assembly is fixedly connected to the planet carrier. The second bearing is arranged to restrain the planet carrier to rotate only along the output shaft, and the effects of small sliding resistance and power consumption, easiness in starting and guarantee of stable operation of the output shaft can be achieved.
Further preferably, the resistance transmission mechanism further comprises a needle shaft and a needle bearing, through holes are formed in two ends of the planet carrier, the needle shaft penetrates through the through holes, and the planet wheel is rotatably sleeved on the needle shaft through the needle bearing. Through setting up the bearing on this through-hole for can drive the planet wheel when the sun gear rotates and rotate, thereby the planet wheel drives bearing and rotates and drive the planet carrier and take place to rotate, or when the planet carrier takes place to rotate, the bearing rotates and drives bearing simultaneously with the planet carrier and rotates, and then drives the planet wheel and rotates, it takes place to rotate to drive the sun gear at last, planet carrier and planet wheel can transmit moment of torsion and the rotation of mutual transmission around the revolution that the output shaft goes on promptly.
Further preferably, openings are formed in two sides of the planet carrier, and the planet wheels are meshed with the inner gear ring.
Further preferably, the sun gear, the planet gear and the inner gear ring adopt involute helical gears. The involute helical gear is low in cost, low in noise and capable of guaranteeing precision.
Further preferably, the resistance transmission mechanism further comprises a bearing end cover, and the bearing end cover is sleeved at the tail end of the output shaft of the resistance source and is abutted against the second bearing. The bearing end cap is configured to prevent the second bearing from falling out during rotation of the resistance source.
Preferably, the resistance transmission mechanism further comprises a bracket, wherein the bracket is fixedly arranged on the resistance source and covers the first winding assembly and the second winding assembly. The resistance transmission mechanism can be quickly and conveniently fixedly arranged in the body-building equipment through the bracket.
Compared with the prior art, the beneficial results of the invention are as follows:
(1) the resistance transmission mechanism provided by the invention has the advantages that through the matching of the motor and the planetary gear box, the requirement of double-rope output force which can be realized by two motors originally is realized, the cost is greatly reduced, and compared with the scheme that the pull ropes are directly wound by the output shafts of the two motors, the resistance transmission mechanism provided by the invention has larger output pull force and torque;
(2) compared with a movable pulley rope differential structure scheme, the resistance transmission mechanism provided by the invention has higher reliability, and the requirements of speed reduction and torque increase are more conveniently realized;
(3) compared with a bevel gear differential structure, the bevel gear differential structure is simpler and more compact in structure, a synchronous belt and a synchronous wheel are not required for transmission, the processing cost of a cylindrical gear is lower than that of a sector gear, and low noise is easier to achieve;
(4) compared with a movable pulley rope differential structure, a bevel gear differential structure and a double-motor scheme, the resistance transmission mechanism provided by the invention can meet the resistance transmission requirement of single motor and double outgoing lines only by occupying a smaller space.
Drawings
The accompanying drawings are included to provide a further understanding of the embodiments and are incorporated in and constitute a part of this specification. The drawings illustrate embodiments and together with the description serve to explain the principles of the invention. Other embodiments and many of the intended advantages of embodiments will be readily appreciated as they become better understood by reference to the following detailed description. The elements of the drawings are not necessarily to scale relative to each other. Like reference numerals designate corresponding similar parts.
FIG. 1 is an exploded view of a resistance drive mechanism according to an embodiment of the present invention;
FIG. 2 is a cross-sectional view of a resistance drive mechanism according to an embodiment of the present invention;
FIG. 3 is a schematic assembly view of a resistance drive mechanism according to an embodiment of the present invention;
FIG. 4 is an overall block diagram of a resistance drive mechanism according to an embodiment of the present invention;
FIG. 5 is a schematic diagram of an application of a resistance drive mechanism according to an embodiment of the present invention.
The meaning of each number in the figure: 1-motor, 11-output shaft of motor, 2-planetary gear box, 21-sun gear, 22-planetary gear, 23-planetary carrier, 231-opening, 232-through hole, 24-needle shaft, 25-inner gear ring, 26-needle bearing, 31-first winding component, 32-second winding component, 4-outer ring, 51-first bearing, 52-second bearing, 6-bearing end cover, 7-bracket, 81-first pull rope, 82-second pull rope, 9-fixed pulley, 10-rotary swing arm.
Detailed Description
In the following detailed description, reference is made to the accompanying drawings, which form a part hereof, and in which is shown by way of illustration specific embodiments in which the invention may be practiced. In this regard, directional terminology, such as "top," "bottom," "left," "right," "up," "down," etc., is used with reference to the orientation of the figures being described. Because components of embodiments can be positioned in a number of different orientations, the directional terminology is used for purposes of illustration and is in no way limiting. It is to be understood that other embodiments may be utilized and logical changes may be made without departing from the scope of the present invention. The following detailed description is, therefore, not to be taken in a limiting sense, and the scope of the present invention is defined by the appended claims.
The present invention is directed to a resistance drive mechanism for an exercise apparatus, fig. 1 shows an exploded view of a resistance drive mechanism according to an embodiment of the present invention, fig. 2 shows a cross-sectional view of a resistance drive mechanism according to an embodiment of the present invention, fig. 3 shows an assembled schematic view of a resistance drive mechanism according to an embodiment of the present invention; referring to fig. 1-3 in combination, the resistance transmission mechanism includes a resistance source, a planetary gear box 2, a first winding assembly 31, a second winding assembly 32, an outer ring 4, a first bearing 51, and a second bearing 52, wherein the planetary gear box 2 includes a sun gear 21, a planet gear 22, a planet carrier 23, a needle shaft 24, an inner gear ring 25, and a needle bearing 26, the resistance source specifically includes one or more of a motor 1, a wind resistance, a magnetic resistance, and a water resistance, and the motor 1 is taken as an example in this embodiment.
Two second bearings 52 cup joint on the output shaft 11 of motor 1, and two second bearings 52 joint are in the inboard of planet carrier 23 simultaneously, set up second bearing 52 and can play the restraint planet carrier 23 and can only follow the output shaft 11 rotatoryly, start easily, the rotational stability and reduce the effect of rolling resistance and power loss. The two first bearings 51 are sleeved on the planet carrier 23, and meanwhile, the two first bearings 51 are clamped on the inner side of the outer ring 4, and the arrangement of the first bearings 51 can restrict the outer ring 4 to rotate only along the axis of the planet carrier 23 and the output shaft 11. Therefore, the output shaft 11, the carrier 23, and the outer ring 4 can freely and smoothly rotate (including forward rotation and reverse rotation) at will along the output shaft 11.
The sun gear 21 is fixed to the output shaft 11 and positioned between the two second bearings 52, and the sun gear 21 and the output shaft 11 rotate simultaneously. The planetary gear 22 is sleeved on the needle shaft 24 through the needle bearing 26, and the needle shaft 24 is penetrated and connected in the through hole 232 on the planet carrier 23, so the planetary gear 22 can rotate along the needle shaft 24 and also can revolve along the output shaft 11, and the planet carrier 23 and the planetary gear 22 can mutually transmit torque and mutually transmit and rotate. The sun wheel 21 meshes with the planet wheels 22, so that the sun wheel 21 and the planet wheels 22 can transmit torque to each other and can rotate in a transmission manner. The ring gear 25 is fixed inside the outer ring 4 and between the two first bearings 51, so that the ring gear 25 can rotate simultaneously with the outer ring 4. The planet carrier 23 is provided at both sides thereof with openings 231, through which openings 231 the ring gear 25 can be engaged with the planetary gears 22, so that the rotation and revolution of the ring gear 25 and the planetary gears 22 transmit torque to each other and transmit rotation to each other. Different from the traditional planetary reduction mechanism, the resistance source machine body (taking the motor 1 as an example), the output shaft 11, the planet carrier 23 and the inner gear ring 25 in the application can rotate independently in pairs. Preferably, the sun gear 21, the planet gears 22 and the inner gear ring 25 adopt involute helical gears to reduce noise and ensure accuracy. The first winding assembly 31 is fixedly mounted on the outer ring 4 outside the planetary gear box 2 by bolts or bonding, and the second winding assembly 32 is fixedly mounted on the planet carrier 23 of the planetary gear box 2 by bolts or bonding.
With continued reference to fig. 1, the resistance transmission mechanism further includes a bearing end cover 6 and a bracket 7, wherein the bearing end cover 6 is sleeved on the end of the output shaft 11 of the motor 1 and abuts against the second bearing 52 on the side far away from the motor 1, and the bearing end cover 6 is arranged to prevent the second bearing 52 from falling off during the rotation of the motor 1 and affecting the operation of the resistance transmission mechanism. The support 7 is fixedly arranged on the motor 1 through a bolt, and the resistance transmission mechanism can be quickly and conveniently fixedly arranged in the body-building equipment through the support 7.
Fig. 4 is a view showing the overall configuration of the resistance drive mechanism according to an embodiment of the present invention, which further includes a first cord 81 and a second cord 82, wherein the first cord 81 is wound around the first cord winding assembly 31 and the second cord 82 is wound around the second cord winding assembly 32, as shown in fig. 4. The motor 1 provides continuous unidirectional torque which is transmitted to the first winding assembly 31 and the second winding assembly 32 through the planetary gear box 2, and then transmitted to the first pull rope 81 and the second pull rope 82 through the first winding assembly 31 and the second winding assembly 32, which shows that the first pull rope 81 and the second pull rope 82 both have continuous tension and the tendency of being wound up by the first winding assembly 31 and the second winding assembly 32 respectively. Since the torque amplification factors of the ring gear 25 and the carrier 23 with respect to the output shaft 11 are different, the tensile forces output by the first and second cords 81 and 82 can be made equal or similar by designing the diameters of the first and second winding assemblies 31 and 32 to be different.
With continued reference to FIG. 4, in a particular embodiment, the resistance drive mechanism includes the following three states of motion: when the external environment (including the exerciser and the rope limit position limiting structure) does not apply a pulling force to the first and second pulling ropes 81 and 82, or the applied pulling force is smaller than the pulling force exhibited by the first and second pulling ropes 81 and 82, the first and second pulling ropes 81 and 82 are in a state of being wound around the first and second winding assemblies 31 and 32, respectively, and the first and second pulling ropes 81 and 82 are continuously kept in a tight state and continuously output the pulling force; when the external force applied to the first pulling rope 81 and the second pulling rope 82 is greater than the pulling force exerted by the first pulling rope 81 and the second pulling rope 82, the first pulling rope 81 and the second pulling rope 82 are in a state of being pulled away from the first winding assembly 31 and the second winding assembly 32 respectively, and the pulling ropes are kept in a tensioned state continuously and output pulling force continuously; when the external force applied to the first pulling rope 81 and the second pulling rope 82 is equal to the pulling force exerted by the first pulling rope 81 and the second pulling rope 82, the first pulling rope 81, the second pulling rope 82, the first winding assembly 31 and the second winding assembly 32 are all in a static state, and at this time, the pulling ropes still continuously keep a tight state and continuously output the pulling force.
With combined reference to fig. 2, 3 and 4, the working principle of the resistance drive mechanism is as follows: the output shaft 11 of the motor 1 continuously outputs torque and transmits the torque to the sun gear 21, the sun gear 21 transmits the torque to the planet gears 22, and the planet gears 22 transmit the torque to the ring gear 25. And the downstream gear 22 exhibits a tendency to revolve along the output shaft 11 and a torque transmitted to the carrier 23 through the needle bearing 26 and the needle shaft 24 under the interaction of the ring gear 25 and the sun gear 21. Therefore, the ring gear 25 and the carrier 23 output torque simultaneously under the interaction inside the planetary gear box 2, and the torque may be several times of the torque of the output shaft 11 after being subjected to deceleration amplification. The torque is transmitted to the first and second pulling ropes 81 and 82 through the first and second winding assemblies 31 and 32, respectively, to generate a pulling force in the first and second pulling ropes 81 and 82. However, the reduction gear ratios of the ring gear 25 and the carrier 23 with respect to the output shaft 11 are different, and therefore the output torques are different, and the first and second pulling ropes 81 and 82 can exhibit the same or similar pulling forces by properly designing the sizes of the different diameters of the first and second winding assemblies 31 and 32. The first winding member 31 and the second winding member 32 may rotate independently, simultaneously, or simultaneously rotate in one forward direction and one reverse direction. That is, through the resistance transmission mechanism, the exerciser can feel the tensile force output by the first pulling rope 81 and the second pulling rope 82 when the first pulling rope 81 and the second pulling rope 82 are in any combination of pulling out, contracting or being at rest, so as to meet the use requirement of the exerciser for exercising both arms or only one arm.
Compared with the traditional tension fitness equipment using the balancing weight, the resistance transmission mechanism provided by the invention is the fitness equipment which uses resistance sources such as a motor and the like to generate resistance, has smaller volume and lighter weight, can be installed and placed in more places such as houses, offices, leisure places and the like, and can adjust the resistance through a digital control system. Converting the "weight motion" of a conventional counterweight exercise device into motor rotation, since the circumference and rotational speed of the first and second wire wrap assemblies 31 and 32 are known, the linear motion of the first and second pull cords 81 and 82 can be calculated to provide an effect equivalent to the linear motion of the counterweight.
Fig. 5 is a schematic view showing the application of the resistance drive mechanism according to an embodiment of the present invention, and as shown in fig. 5, in the embodiment, the first rope 81 wound on the first winding assembly 31 and the second rope 82 wound on the second winding assembly 32 of the resistance drive mechanism are respectively wound around the fixed pulley 9 and then fixedly connected to the rotary swing arm 10. The two pull ropes can be directly led out by using the resistance transmission mechanism, and compared with a traditional mechanism in which a motor is matched with a pulley block to provide resistance, the resistance transmission mechanism has a more compact structure, can save a large number of pulleys, occupies a smaller volume, and can be conveniently and quickly installed inside body-building equipment through the support 7. Moreover, because the invention has the functions of speed reduction and torque increase, the wire winding assembly can adopt a larger diameter, so that the resistance transmission mechanism provided by the invention can store and wind a large number of pull ropes, and the larger the diameters of the first wire winding assembly 31 and the second wire winding assembly 32 are or the thinner the first pull rope 81 and the second pull rope 82 are, the longer distance of the pull ropes can be stored, so as to meet the requirement of a body builder to carry out higher-strength training.
It will be apparent to those skilled in the art that various modifications and variations can be made to the embodiments of the present invention without departing from the spirit and scope of the invention. In this way, if these modifications and changes are within the scope of the claims of the present invention and their equivalents, the present invention is also intended to cover these modifications and changes. The word "comprising" does not exclude the presence of other elements or steps than those listed in a claim. The mere fact that certain measures are recited in mutually different dependent claims does not indicate that a combination of these measures cannot be used to advantage. Any reference signs in the claims shall not be construed as limiting the scope.

Claims (10)

1. A resistance transmission mechanism for fitness equipment is characterized by comprising a resistance source, a planetary gear box, a first winding assembly and a second winding assembly, wherein the planetary gear box adopts a cylindrical gear, the planetary gear box is arranged on an output shaft of the resistance source, the first winding assembly and the second winding assembly are arranged on the planetary gear box, and the first winding assembly and the second winding assembly can rotate independently.
2. The resistance drive mechanism of claim 1, wherein the planetary gear box comprises a sun gear, a planet carrier, and an annulus gear, the sun gear is fixed to the output shaft of the resistance source, the planet gear is engaged with the sun gear, the planet carrier is rotatably covered outside the sun gear and the planet gear, and the annulus gear is rotatably covered on the planet carrier and engaged with the planet gear.
3. The resistance drive mechanism for an exercise apparatus of claim 1, further comprising a first pull cord wound around said first wire winding assembly and a second pull cord wound around said second wire winding assembly.
4. The resistance drive mechanism for a fitness device of claim 2, further comprising an outer ring and a first bearing, wherein the outer ring is fixedly connected to the inner gear ring, the first bearing is sleeved on the planet carrier and is connected to the inner side of the outer ring in a clamping manner, and the first winding assembly is fixedly connected to the outer ring.
5. The resistance drive mechanism for exercise equipment of claim 2, further comprising a second bearing sleeved on the output shaft and engaged with the inner side of the planet carrier, wherein the second wire winding assembly is fixedly connected to the planet carrier.
6. The resistance transmission mechanism for fitness equipment as recited in claim 2, further comprising a needle shaft and a needle bearing, wherein the planet carrier has through holes at both ends, the needle shaft is inserted into the through holes, and the planet wheel is rotatably sleeved on the needle shaft through the needle bearing.
7. The resistance drive mechanism for an exercise apparatus of claim 2, wherein the planet carrier has openings on either side for the planet gears to engage with the annulus gear.
8. The resistance drive mechanism for an exercise apparatus of claim 2, wherein said sun gear, planet gears and said internal gear are involute helical gears.
9. The resistance drive mechanism for an exercise apparatus according to claim 5, further comprising a bearing cap, wherein the bearing cap is disposed over the output shaft end of the resistance source and abuts the second bearing.
10. The resistance drive mechanism for an exercise apparatus according to claim 1, further comprising a bracket fixedly mounted to the resistance source and housing the first and second wire winding assemblies.
CN202110601067.0A 2021-05-31 2021-05-31 Resistance transmission mechanism for fitness equipment Pending CN113230580A (en)

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CN202110601067.0A CN113230580A (en) 2021-05-31 2021-05-31 Resistance transmission mechanism for fitness equipment

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Application Number Priority Date Filing Date Title
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113577711A (en) * 2021-08-13 2021-11-02 江苏铁人科技有限公司 Motor control-based strength training equipment and motion detection method

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN87208336U (en) * 1987-05-26 1988-02-24 中国建筑科学研究院建筑机械化研究所 Double drum winding engine driven by epicyclic gear
KR20130026296A (en) * 2011-09-05 2013-03-13 성열규 Reverse training apparatus
US20140274576A1 (en) * 2004-09-14 2014-09-18 David Beard Apparatus, system, and method for providing resistance in a dual tread treadmill
CN108144264A (en) * 2018-02-09 2018-06-12 武汉沃森拓客科技有限公司 Mechanical arm for rehabilitation training and healing robot
CN111790096A (en) * 2020-07-28 2020-10-20 宁波浩丰磁性科技有限公司 Multifunctional combined intelligent servo body builder
CN214913019U (en) * 2021-05-31 2021-11-30 北京觅淘智联科技有限公司 Resistance transmission mechanism for fitness equipment

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN87208336U (en) * 1987-05-26 1988-02-24 中国建筑科学研究院建筑机械化研究所 Double drum winding engine driven by epicyclic gear
US20140274576A1 (en) * 2004-09-14 2014-09-18 David Beard Apparatus, system, and method for providing resistance in a dual tread treadmill
KR20130026296A (en) * 2011-09-05 2013-03-13 성열규 Reverse training apparatus
CN108144264A (en) * 2018-02-09 2018-06-12 武汉沃森拓客科技有限公司 Mechanical arm for rehabilitation training and healing robot
CN111790096A (en) * 2020-07-28 2020-10-20 宁波浩丰磁性科技有限公司 Multifunctional combined intelligent servo body builder
CN214913019U (en) * 2021-05-31 2021-11-30 北京觅淘智联科技有限公司 Resistance transmission mechanism for fitness equipment

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113577711A (en) * 2021-08-13 2021-11-02 江苏铁人科技有限公司 Motor control-based strength training equipment and motion detection method

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