CN116262170B

CN116262170B - strength training machine

Info

Publication number: CN116262170B
Application number: CN202111536808.8A
Authority: CN
Inventors: 叶全胜
Original assignee: Guangzhou Yuandong Smart Sports Technology Co Ltd
Current assignee: Guangzhou Yuandong Smart Sports Technology Co Ltd
Priority date: 2021-12-15
Filing date: 2021-12-15
Publication date: 2025-09-26
Anticipated expiration: 2041-12-15
Also published as: CN116262170A

Abstract

The invention discloses a strength training machine, which comprises a damping unit, wherein the damping unit comprises a first winding wheel and a second winding wheel, a first pull rope is wound on the first winding wheel, a second pull rope is wound on the second winding wheel, the first winding wheel, a differential mechanism and the second winding wheel are sequentially sleeved on the periphery of an output shaft along the length direction of the output shaft of a motor of the damping unit, the first winding wheel and the second winding wheel can rotate relative to the output shaft, the differential mechanism is connected with the output shaft, and the differential mechanism is respectively connected with the first winding wheel and the second winding wheel in a transmission way. The differential mechanism can transmit damping power of the motor to the first winding wheel and the second winding wheel respectively, the number of motors of the strength training machine is reduced, and the differential mechanism is sleeved on the periphery of the output shaft, so that the differential mechanism is directly connected with the output shaft, power loss between the motor and the differential mechanism can be reduced, and power transmission efficiency in the damping unit is improved.

Description

Strength training machine

Technical Field

The invention relates to the field of body-building equipment, in particular to a strength training machine.

Background

In order to realize small volume and multiple functions of the strength training apparatus, the strength training apparatus can be used in various occasions such as families, and generally, a motor (or other magnetic control, friction, springs and the like) is used as a resistance source, two groups of resistance sources are generally arranged, and resistance is output from two ends of the apparatus, so that various training actions such as double-arm training and single-arm training are realized, and the purpose of strength training is achieved. Because two groups of motors are needed for the strength instrument, the cost is increased, the tension consistency of the two arms is poor when the two arms are trained due to the arrangement of the two groups of motors, and the control difficulty of the instrument is increased.

Disclosure of Invention

The embodiment of the invention aims to provide a strength training machine which is low in cost and good in consistency of pulling force of two arms during double-arm training.

In order to achieve the above purpose, the invention adopts the following technical scheme:

The utility model provides a strength training machine, including damping unit, damping unit includes first reel and second reel, the winding has first stay cord on the first reel, the winding has the second stay cord on the second reel, damping unit still includes motor and differential mechanism, first reel differential mechanism with the second reel is followed the length direction of the output shaft of motor overlaps in proper order and establishes the periphery of output shaft, first reel with the second reel can for the output shaft rotates, differential mechanism with output shaft, the output shaft drive differential mechanism rotates, differential mechanism respectively with first reel with the transmission of second reel is connected.

The damping power of the motor can be respectively transmitted to the first winding wheel and the second winding wheel by arranging the differential mechanism, so that the number of motors of the strength training machine is reduced, and the cost of the strength training machine is reduced; the differential mechanism can enable the force training machine to perform single-arm training and double-arm training, namely the first pull rope or the second pull rope can be pulled independently, and the first pull rope and the second pull rope can be pulled simultaneously; through setting up differential mechanism and output shaft direct connection, can reduce the power loss between motor and the differential mechanism, promote the transmission efficiency of power in the damping unit, so can reduce the power of motor to reduce the cost of strength training machine, through setting up first reel, differential mechanism and second reel and establish on the output shaft in proper order, can make the compact structure of damping unit, thereby can promote the space utilization of the inside of strength training machine, perhaps reduce the space occupation of the whole machine of strength training machine.

Drawings

The invention is described in further detail below with reference to the drawings and examples.

Fig. 1 is a schematic view of a damping unit (support and motor not shown) according to an embodiment of the present invention.

Fig. 2 is an exploded view of the damping unit according to the embodiment of the present invention (the support and motor are not shown).

Fig. 3 is an exploded view of a damping unit according to an embodiment of the present invention.

Fig. 4 is an enlarged schematic view at a of fig. 3.

FIG. 5 is a schematic diagram of a strength training machine according to an embodiment of the present invention.

Fig. 6 is a schematic view of a universal guide sleeve according to an embodiment of the present invention.

In the figure:

100. 200 parts of damping unit, 300 parts of frame, 300 parts of first handle, 400 parts of second handle, 500 parts of limiting plate, 5001 parts of universal guide sleeve, 5002 parts of horn hole, 600 parts of first limiting block, 700 parts of second limiting block, 800 parts of bend pulley;

1. The first reel, 2, the second reel, 3, the differential mechanism, 31, the first driving wheel assembly, 311, the first driven wheel, 312, the first belt wheel, 313, the first driving belt, 32, the second driving wheel assembly, 321, the second driven wheel, 322, the second driving belt, 323, the second belt wheel, 324, the direction changing belt wheel, 33, the driving wheel frame, 331, the frame body, 3311, the first mounting hole, 332, the mounting position, 333, the reinforcing rib, 34, the first rotating shaft, 35, the second rotating shaft, 4, the output shaft, 5, the motor, 6, the support, 61, the first groove wall, 62, the second groove wall, 621, the third mounting hole, 63, the mounting groove, 7, the bearing sleeve, 8, the positioning sleeve, 9, the first pull rope and 10, the second pull rope.

Detailed Description

In order to make the technical problems solved by the present invention, the technical solutions adopted and the technical effects achieved more clear, the technical solutions of the embodiments of the present invention will be described in further detail below with reference to the accompanying drawings, and it is obvious that the described embodiments are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to fall within the scope of the invention.

As shown in fig. 1 to 3 and 5, the strength training machine provided by the invention comprises a damping unit 100, wherein the damping unit 100 comprises a first reel 1, a second reel 2, a motor 5 and a differential mechanism 3, a first pull rope 9 is wound on the first reel 1, a second pull rope 10 is wound on the second reel 2, the first reel 1, the differential mechanism 3 and the second reel 2 are sequentially sleeved on the periphery of the output shaft 4 of the motor 5 along the length direction of the output shaft 4 of the motor 5, the first reel 1 and the second reel 2 can rotate relative to the output shaft 4, the differential mechanism 3 is connected with the output shaft 4, the differential mechanism 3 is driven to rotate by the output shaft 4, and the differential mechanism 3 is respectively connected with the first reel 1 and the second reel 2 in a transmission way. In the present embodiment, the first reel 1 and the second reel 2 are rotatably connected to the output shaft 4. Through the arrangement of the differential mechanism 3, damping power of the motor 5 can be respectively transmitted to the first winding wheel 1 and the second winding wheel 2, the number of the motors 5 of the strength training machine is reduced, the cost of the strength training machine is reduced, the differential mechanism 3 can enable the strength training machine to perform single-arm training and double-arm training, namely, the first pull rope 9 or the second pull rope 10 can be pulled independently, the first pull rope 9 and the second pull rope 10 can also be pulled simultaneously, when the pulling speeds of the first pull rope 9 and the second pull rope 10 are equal, the torque applied to the first winding wheel 1 by the output shaft 4 and the torque applied to the second winding wheel 2 by the output shaft 4 are equal, through the arrangement of the differential mechanism 3 and the output shaft 4, the power loss between the motor 5 and the differential mechanism 3 can be reduced, the power transmission efficiency of the power in the damping unit 100 is improved, the power of the motor 5 can be reduced, the cost of the strength training machine is reduced, and the first winding wheel 1, the differential mechanism 3 and the second winding wheel 2 are sleeved on the output shaft 4 in turn, the structure of the damping unit 100 can be improved, and the space occupation rate of the strength training machine can be reduced.

In the present embodiment, when the first and second ropes 9 and 10 are pulled, the power provided by the motor 5 is damping power, i.e., the power of the motor 5 increases the difficulty of pulling the first and second ropes 9 and 10, and when the first and second ropes 9 and 10 are recovered, the power provided by the motor 5 is recovering power, i.e., the power of the motor 5 rotates the first and second reels 1 and 2, so that the first and second ropes 9 and 10 are wound on the first and second reels 1 and 2, respectively. The rotation directions of the output shaft 4, the first reel 1, and the second reel 2 in the pulled state and the retracted state described above are opposite.

Referring to fig. 1 and 2, in particular, the differential 3 includes a driving wheel frame 33, a first driving wheel assembly 31 and a second driving wheel assembly 32, the driving wheel frame 33 is connected with the output shaft 4, so that the output shaft 4 drives the driving wheel frame 33 to rotate around the axis direction of the output shaft 4, the first driving wheel assembly 31 and the second driving wheel assembly 32 are respectively installed at two opposite sides of the driving wheel frame 33, the first driving wheel assembly 31 is in driving connection with the first reel 1, and the second driving wheel assembly 32 is in driving connection with the second reel 2. In this embodiment, the two sets of driving wheel assemblies are respectively connected with the first reel 1 and the second reel 2 in a driving manner, the resistance of the output shaft 4 can be transmitted to the first reel 1 through the first driving wheel assembly 31 alone, and the resistance of the output shaft 4 can be transmitted to the second reel 2 through the second driving wheel assembly 32 alone, so that the interaction between the first reel 1 and the second reel 2 can be reduced, the independent pulling of the first pull rope 9 and the second pull rope 10 can be realized, and the training effect can be improved.

In this embodiment, the first and second drive wheel assemblies 31, 32 are drive pulley assemblies. It can be understood that the driving pulley is suitable for the transmission with a relatively close center distance between two shafts, and the power loss between the motor 5 and the differential mechanism 3 is relatively small, so that the motor 5 with small power can be adopted, namely, the motor 5 has relatively small size, at the moment, the size of the differential mechanism 3 can be correspondingly reduced to meet the use condition of the driving pulley, the driving pulley has the advantages of small noise during transmission and flexible speed and direction change during operation, the output shaft 4 in a pulling state, the first winding wheel 1 and the second winding wheel 2 correspond to the rotation directions of the output shaft 4 in a recovering state, the first winding wheel 1 and the second winding wheel 2, and the situation that the pulling force of the first pull rope 9 and the second pull rope 10 are inconsistent easily occurs. The belt wheel transmission has the advantages of low processing difficulty and low precision requirement of the belt wheel compared with a bevel gear, low assembly precision requirement of the belt wheel transmission compared with a gear transmission, low installation difficulty and high overall reliability.

In another embodiment, the first driving wheel assembly 31 and the second driving wheel assembly 32 may be driving sprocket assemblies, it will be understood that when the tension of the driving belt is too high, the driving belt is easy to break, the tension of the driving belt needs to be adjusted to make the driving belt tension maintain the driving effect, and the chain driving is by using the tooth slot cooperation of the sprocket and the chain, therefore, the driving sprocket assemblies do not need to additionally adjust the tension of the chain, the chain is made of metal, and the chain is not easy to break, so that the strength training machine made of the driving sprocket assemblies has a larger strength training range.

Referring to fig. 3 and 4, in detail, the first driving wheel assembly 31 includes a first driven wheel 311, a first pulley 312 and a first driving belt 313, the first driven wheel 311 and the first pulley 1 are fixedly connected, the first pulley 312 is rotatably disposed on the pulley frame 33, an inner surface of the first driving belt 313 is abutted against outer circumferences of the first driven wheel 311 and the first pulley 312, the second driving wheel assembly 32 includes a second driven wheel 321, a second driving belt 322, a second pulley 323 and at least one redirecting pulley 324, in this embodiment, the redirecting pulley 324 is provided with two, the second driven wheel 321 and the second pulley 2 are connected, the second pulley 323 and the redirecting pulley 324 are rotatably disposed on the pulley frame 33, and the second pulley 323 and the redirecting pulley 324 are disposed at intervals, an inner surface of the second driving belt 322 is abutted against outer circumferences of the second pulley 323 and the redirecting pulley 324, an outer surface of the second driving belt 322 is abutted against outer circumferences of the second driven wheel 321, and the second pulley 323 and the first pulley 312 are simultaneously rotated. The cooperation between the first belt pulley 312, the second belt pulley 323, the direction-changing belt pulley 324, the first driving belt 313 and the second driving belt 322 can transmit the power provided by the motor 5 to the first reel 1 and the second reel 2 respectively, so that the pulling resistance of the first pull rope 9 and the second pull rope 10 is increased, the training effect is improved, the first pull rope 9 and the second pull rope 10 can be smoothly pulled, the direction-changing belt pulley 324 can enable the outer surface of the second driving belt 322 to be sleeved on the outer periphery of the second driven wheel 321, the second driving belt 322 can be kept tensioned, the slipping among the second driving belt 322, the second driven wheel 321 and the second belt pulley 323 is reduced, and the power transmission loss is reduced. Of course, the direction-changing pulleys 324 may be three, four or more according to the size of the differential 3, so that the second transmission belt 322 is kept tensioned, the second transmission wheel assembly 32 may operate stably, and when the size of the differential 3 is large, the first transmission wheel assembly 31 may be provided with tensioning wheels, so as to ensure the tensioning of the first transmission belt 313.

In an embodiment, only one direction-changing pulley 324 may be provided, where the second driven pulley 321 is located between the direction-changing pulley 324 and the second pulley 323, but the second driven pulley 321 is offset from the connection line between the direction-changing pulley 324 and the second pulley 323, so that the second driving belt 322 can be wound on the second driven pulley 321 to form a wrap angle, and the differential 3 can be operated. In this embodiment, two redirecting pulleys 324 are adopted, and the two redirecting pulleys 324 and the second pulley 323 form a triangle structure, so that the overall balance of the second driving wheel assembly 32 is better, and the stress is more uniform.

Specifically, the transmission wheel frame 33 is provided with a first rotating shaft 34 and a second rotating shaft 35, and the first rotating shaft 34 and the second rotating shaft 35 are both rotatably connected with the transmission wheel frame 33, wherein the number of the second rotating shafts 35 is adapted to the number of the direction-changing pulleys 324. The two ends of the first rotating shaft 34 are fixedly connected with the first belt pulley 312 and the second belt pulley 323 respectively, and the end of the second rotating shaft 35, which is far away from the transmission wheel frame 33, is fixedly connected with the redirecting belt pulley 324. The first pulley 312 and the second pulley 323 are connected by adopting the same first rotating shaft 34, so that the first pulley 312 and the second pulley 323 can synchronously rotate, and the first transmission wheel assembly 31 and the second transmission wheel assembly 32 are linked, thereby ensuring the working effect of the differential mechanism 3. In other embodiments, the second rotating shaft 35 may be fixedly connected to the pulley frame 33, where it is required to ensure that the second rotating shaft 35 and the redirecting pulley 324 can rotate, that is, one end of the second rotating shaft 35 away from the pulley frame 33 is rotationally connected to the redirecting pulley 324.

Specifically, the first driven pulley 311 and the first pulley 312 are both synchronous pulleys, and the first transmission belt 313 is a synchronous toothed belt. When the synchronous pulley rotates, the first driven wheel 311, the first pulley 312 and tooth grooves on the first transmission belt 313 are meshed to transmit motion and power, and the synchronous pulley is meshed to transmit motion and power, and has the advantages that 1, the synchronous pulley does not need additional drilling, key slot pulling and other procedures, so that the synchronous pulley is convenient and fast to install and adjust, time and labor are saved, 2, the synchronous pulley has high precision and high torque, the problem of frequent loosening in transmission is not worry, the transmission precision is precise, no gap exists, 3, the synchronous pulley and the synchronous toothed belt are matched to transmit, the buffer function can be achieved in the operation process, the vibration reducing function can be achieved, the operation stability can be kept, and 4, the degree of fit between the synchronous pulley and the synchronous toothed belt is high, and the noise in the use process is small. Of course, the second driven pulley 321, the second pulley 323, and the direction-changing pulley 324 may be all synchronous pulleys, and accordingly, the second transmission belt 322 is a synchronous toothed belt.

Preferably, the driving wheel frame 33 is provided with a tension member (not shown) for adjusting the distance between the first and second rotating shafts 34 and 35 and the adjacent two second rotating shafts 35. In one embodiment, the tensioning member is part of the body of the drive wheel frame 33, which may be provided in the middle of the body of the drive wheel frame 33 to adjust the spacing between the shafts. In another embodiment, the tensioning member may be a separate member from the driving wheel frame 33, and the first rotation shaft 34 and the second rotation shaft 35 are connected to the driving wheel frame 33 through the tensioning member. By providing the tension member, the tension degree of the first and second transmission belts 313 and 322 can be adjusted by adjusting the distance between the first and second rotation shafts 34 and 35, and the transmission effect of the first and second transmission wheel assemblies 31 and 32 can be improved. In other embodiments, one tensioning member may be separately provided, so that the first rotation shaft 34 or the second rotation shaft 35 may be separately adjusted, which may reduce the cost, or two, three or more tensioning members may be provided, so as to increase the number of adjustable rotation shafts, thereby improving the transmission effect.

Referring to fig. 4, specifically, the driving wheel frame 33 includes a frame body 331, a first mounting hole 3311 is provided in the middle of the frame body 331, an output shaft 4 of the motor 5 penetrates through the first mounting hole 3311 and is fixed to the frame body 331, in this embodiment, a groove structure for fixing is provided on a hole wall of the first mounting hole 3311, a key structure for fixing is provided on an outer periphery of the output shaft 4, in this embodiment, connection between the output shaft 4 and the frame body 331 is achieved by adopting key and groove matching, the key and groove matching can limit the frame body 331 axially and radially, in another embodiment, a positioning sleeve 8 can be provided on the output shaft 4 to axially position the frame body 331, in other embodiments, a limiting structure can be provided on the output shaft, the limiting structure can be a table board, a bump, a spacer, and the like, at least two mounting positions 332 are provided along a circumferential ring of the first mounting hole 3311, the mounting positions 332 are used for mounting the first rotating shaft 34 or the second rotating shaft 35, and therefore, the number of the mounting positions 332 is matched with the number of the first rotating shaft 34 and the second rotating shaft 35. By arranging the mounting position 332 to be annularly arranged at the periphery of the first mounting hole 3311, the stress of the frame body 331 can be balanced, so that the stress of the output shaft 4 is balanced, and the phenomenon that the output shaft 4 is blocked is avoided.

Specifically, two adjacent mounting positions 332 are connected through the reinforcing ribs 333, so that the strength of the transmission wheel frame 33 can be improved, the change of the inter-axle distance between the transmission wheels is avoided, and the differential 3 can be ensured to stably operate.

Referring to fig. 5, the strength training machine includes a frame 200, a damping unit 100 is disposed on the frame 200, at least two diverting pulleys 800 are disposed on the frame 200, one end of a first pull rope 9 far away from the damping unit 100 bypasses one of the diverting pulleys 800 to be connected with a first handle 300, and one end of a second pull rope 10 far away from the damping unit 100 bypasses the other diverting pulley 800 to be connected with a second handle 400. Through setting up bend pulley 800, can adjust the direction of first stay cord 9 and second stay cord 10 for first stay cord 9 and second stay cord 10 can adapt to the pulling force direction of training person, improve training person's training experience.

Preferably, the diverting pulley 800 is a universal wheel. The excessively large diameters of the first and second reels 1 and 2 are disadvantageous to the rotation of the first and second reels 1 and 2, and in order to reduce the diameters of the first and second reels 1 and 2 after winding, it is necessary to increase the thicknesses of the first and second reels 1 and 2 and wind the first and second ropes 9 and 10 around the first and second reels 1 and 2, respectively, in the thickness direction of the first and second reels 1 and 2, side by side, to provide winding spaces for the first and second ropes 9 and 10. Because the thickness of the first reel 1 and the second reel 2 is larger, the pulling force direction of the first pull rope 9 and the second pull rope 10 can deflect, the direction-changing pulley 800 is set as a universal wheel, the angle of the direction-changing pulley 800 can be adjusted to adapt to the pulling force direction of the first pull rope 9 and the second pull rope 10, the phenomenon that the first pull rope 9, the second pull rope 10 and the direction-changing pulley 800 are blocked due to overlarge friction force is avoided, and the training experience of a trainer is improved.

Specifically, a limiting plate 500 is disposed on the stand 200, a universal guide sleeve 5001 is disposed on the limiting plate 500, a horn hole 5002 is disposed in the universal guide sleeve 5001, referring to fig. 6, the horn hole 5002 penetrates through two ends of the universal guide sleeve 5001, the sizes of two ends of the horn hole 5002 are larger than the sizes of the middle part of the horn hole 5002, a redirecting pulley 800 is adjacent to the universal guide sleeve 5001, a first limiting block 600 is disposed between the first pull rope 9 and the first handle 300, the first pull rope 9 is connected with the first handle 300 through the first limiting block 600, the first pull rope 9 penetrates through the horn hole 5002 and the first limiting block 600, the first limiting block 600 is larger than the smallest size of the horn hole 5002 of the universal guide sleeve 5001, the second pull rope 10 is connected with the second handle 400 through the second limiting block 700, the second pull rope 10 penetrates through the horn hole 5002 and the second limiting block 700, the second limiting block 700 is larger than the smallest size of the horn hole 5002 of the universal guide sleeve 5001, and the first pull rope 700 is prevented from being wound on the first winding wheel 500 and the second winding wheel 500 to the smallest size of the first winding wheel 600 and the second winding wheel 500, and the second winding wheel 500 can be prevented from winding around the first winding wheel 2 and the second winding wheel 2. In this embodiment, two limiting plates 500 are respectively disposed corresponding to the first pull rope 9 and the second pull rope 10, the second limiting block 700 and the first limiting block 600 are spherical, and the diameters of the second limiting block 700 and the first limiting block 600 are larger than the diameter of the horn hole 5002 of the universal guide sleeve 5001. Through setting up universal guide pin bushing 5001, can conveniently process horn hole 5002 to make the pore wall in horn hole 5002 smooth, resistance and the noise that produces because of the friction when can reducing first stay cord 9 and second stay cord 10 pulling.

Specifically, the damping unit 100 includes a support 6, one side of the support 6 is connected to the frame 200, the other side of the support 6 is provided with a mounting groove 63, the mounting groove 63 has a first groove wall 61 and a second groove wall 62 which are oppositely disposed, the motor 5 is disposed on the first groove wall 61, one end of the output shaft 4 away from the motor 5 is rotatably connected to the second groove wall 62, and the first reel 1, the second reel 2 and the differential 3 are all disposed in the mounting groove 63. Through setting up support 6, support 6 can play the effect of supporting for damping unit 100, and support 6 can also provide the connection for damping unit 100 and frame 200, has made things convenient for the equipment of strength training machine.

Referring to fig. 3, specifically, the first groove wall 61 of the support 6 is provided with a second mounting hole, the second groove wall 62 is provided with a third mounting hole 621, the motor 5 is partially disposed in the mounting groove 63, the output shaft 4 of the motor 5 is inserted into the first mounting hole 3311 from the second mounting hole, one end of the output shaft 4 away from the motor 5 is connected with the wall of the third mounting hole 621 through the bearing housing 7, and the output shaft 4 is hinged with the bearing housing 7.

Referring to fig. 3, specifically, the first reel and the second reel are respectively connected through bearings and an output shaft 4 in a rotating manner, one end of the output shaft 4 far away from the motor 5 is sleeved with a positioning sleeve 8, so that positioning connection among the first reel 1, the differential 3 and the second reel 2 is realized, axial movement of the first reel 1, the differential 3 and the second reel 2 along the output shaft 4 is limited, and shaking among the first reel 1, the differential 3 and the second reel 2 is avoided. In other embodiments, a limiting structure may be further disposed on the output shaft 4, for example, a step surface may be disposed at one end of the output shaft 4 to abut against the bearing of the first reel 1, a spacer or other limiting structure may be disposed between the first reel 1 and the gear frame 33, and between the gear frame 33 and the second reel 2, and the positioning sleeve 8 may be disposed on a side of the second reel 2 away from the gear frame 33, such that an end surface of the positioning sleeve 8 abuts against the bearing of the second reel 2.

In this embodiment, when the user performs double-arm training, the user pulls the first pull rope 9 and the second pull rope 10 at the same time, when the pull forces of the first pull rope 9 and the second pull rope 10 are consistent, that is, the rotation speeds of the first reel 1 and the second reel 2 are consistent, the first pulley 312, the second pulley 323 and the redirecting pulley 324 only rotate around the output shaft 4 along with the transmission wheel frame 33, the first pulley 312, the second pulley 323 and the redirecting pulley 324 do not rotate, and when the pull forces of the first pull rope 9 and the second pull rope 10 are inconsistent, that is, the first reel 1 and the second reel 2 have a rotation speed difference, the first pulley 312, the second pulley 323 and the redirecting pulley 324 rotate around the output shaft 4 along with the rotation speeds of the transmission wheel frame 33, that is, the first pulley 312 and the second pulley 323 rotate around the first rotation shaft 34 along with the rotation speeds of the output shaft 4 along with the rotation speeds of the redirecting pulley 324 around the second rotation shaft 35, so that the first pull rope 9 and the second pull rope 10 can be kept tensioned; when a user performs a single-arm exercise, for example, the user pulls the first pull rope 9 alone, and the pulling force of the first pull rope 9 is transmitted to the second reel 2 through the first reel 1 and the differential 3, so that the second reel 2 has a rotating trend, and the direction of the rotating trend of the second reel 2 is the same as that of the first reel 1, at this time, under the limiting action of the limiting plate 500 and the second limiting block 700, the second pull rope 10 is in a tight state, the second reel 2 cannot rotate, and the differential 3 can enable the rotation of the first reel 1 and the second reel 2 to be independent and not affected, so that the user can implement a single-side force exercise. The case where the user pulls the second pulling cord 10 alone is similar to the case where the user pulls the first pulling cord 9 alone, and detailed description thereof will be omitted.

Claims

1. The utility model provides a strength training machine, includes damping unit, damping unit includes first reel and second reel, the winding has first stay cord on the first reel, the winding has the second stay cord on the second reel, its characterized in that, damping unit still includes motor and differential mechanism, first reel differential mechanism with the second reel is followed the length direction of the output shaft of motor overlaps in proper order and establishes the periphery of output shaft, first reel with the second reel can for the output shaft rotates, differential mechanism with output shaft connection, the output shaft drive differential mechanism rotates, differential mechanism respectively with first reel with second reel transmission connection.

2. The strength training machine of claim 1 wherein the differential includes a drive wheel carrier, a first drive wheel assembly and a second drive wheel assembly, the drive wheel carrier and the output shaft being connected such that the output shaft drives the drive wheel carrier to rotate about the axis of the output shaft, the first drive wheel assembly and the second drive wheel assembly being mounted on opposite sides of the drive wheel carrier, respectively, the first drive wheel assembly being in drive connection with the first reel, the second drive wheel assembly being in drive connection with the second reel.

3. A strength training machine as claimed in claim 2 wherein the first and/or second drive wheel assemblies are drive pulley assemblies or drive sprocket assemblies.

4. A strength training machine as claimed in claim 3 wherein said first drive wheel assembly includes a first driven wheel, a first pulley and a first drive belt, said first driven wheel being fixedly connected to said first reel, said first pulley being rotatably disposed on said drive wheel frame, an inner surface of said first drive belt abutting against an outer periphery of said first driven wheel and an outer periphery of said first pulley;

The second driving wheel assembly comprises a second driven wheel, a second driving belt, a second belt wheel and a redirecting belt wheel, the second driven wheel is fixedly connected with the second winding wheel, the second belt wheel and the redirecting belt wheel are both rotatably arranged on the driving wheel frame, the second belt wheel and the redirecting belt wheel are arranged at intervals, the inner surface of the second driving belt is abutted against the outer periphery of the second belt wheel and the outer periphery of the redirecting belt wheel, the outer surface of the second driving belt is abutted against the outer periphery of the second driven wheel, and the second belt wheel and the first belt wheel are simultaneously rotated.

5. The strength training machine of claim 4 wherein the first driven wheel and the first pulley are synchronous pulleys, the first drive belt is a synchronous toothed belt, and/or,

The second driven wheel, the second belt wheel and the redirecting belt wheel are synchronous belt wheels, and the second transmission belt is a synchronous toothed belt.

6. The strength training machine of claim 4, wherein the driving wheel frame is provided with a first rotating shaft and a second rotating shaft, two ends of the first rotating shaft are respectively connected with the first belt wheel and the second belt wheel, and the second rotating shaft is connected with the redirecting belt wheel.

7. The strength training machine of claim 6 wherein the drive wheel carrier is provided with a tensioning member for adjusting the distance between the first and second axes of rotation.

8. The strength training machine of claim 6 wherein the drive wheel frame comprises a frame body, a first mounting hole is provided in a middle portion of the frame body, the output shaft penetrates through the first mounting hole and is fixed with the frame body, at least two mounting positions are provided along a peripheral portion of the first mounting hole, and the mounting positions are used for mounting the first rotating shaft or the second rotating shaft.

9. The strength training machine of claim 8 wherein adjacent ones of the mounting locations are connected by a stiffener.

10. The strength training machine of any one of claims 1 to 9 comprising a frame, the damping unit being disposed on the frame, the frame being provided with at least two diverting pulleys, one of the diverting pulleys being connected to a first handle being bypassed at an end of the first pull cord remote from the damping unit, the other of the diverting pulleys being connected to a second handle being bypassed at an end of the second pull cord remote from the damping unit.

11. The strength training machine of claim 10 wherein the diverting pulley is a universal wheel.

12. The strength training machine of claim 10, wherein the frame is provided with a limiting plate, the limiting plate is provided with a universal guide sleeve, a horn hole is arranged in the universal guide sleeve, the horn hole penetrates through two ends of the universal guide sleeve, the two ends of the horn hole are larger than the middle part of the horn hole in size, the redirecting pulley is adjacent to the horn hole, the first pull rope is connected with the first handle through a first limiting block, the first pull rope penetrates through the horn hole and is connected with the first limiting block, the size of the first limiting block is larger than the minimum size of the horn hole, and/or,

The second stay cord pass through the second stopper with the second handle is connected, the second stay cord pass universal guide pin bushing with the second stopper is connected, the size of second stopper is greater than the minimum department size in loudspeaker hole.

13. The strength training machine of claim 10 wherein the damping unit comprises a support, one side of the support is connected to the frame, the other side of the support is provided with a mounting slot, the mounting slot has a first slot wall and a second slot wall opposite to each other, the motor is disposed on the first slot wall, one end of the output shaft remote from the motor is rotatably connected to the second slot wall, and the first reel, the second reel, and the differential are disposed in the mounting slot.

14. The strength training machine of claim 1 wherein the first reel and the second reel are rotatably coupled to the output shaft via bearings, respectively, the output shaft being provided with a positioning sleeve or a limiting structure for limiting axial movement of the first reel, the differential, and the second reel.