CN220090396U - Labor-saving sports equipment - Google Patents

Abstract

The utility model discloses a labor-saving exercise device, which comprises a transmission assembly, a transmission assembly and a transmission assembly, wherein the transmission assembly comprises a pull rod for longitudinally stretching an arm; the bearing rod is positioned below the pull rod and used for bearing the weight of a human body; the first rotating piece is movably connected with the pull rod, and the movement of the pull rod drives the first rotating piece to rotate; the second rotating piece rotates in linkage with the first rotating piece, the second rotating piece is movably connected with the bearing rod, and the rotation of the second rotating piece drives the bearing rod to move along the opposite direction of the pull rod; and the adjusting assembly is used for adjusting the angular speeds of the first rotating piece and the second rotating piece. Through gear tooth chain conduction force, change into the relative motion of two poles to get the laborsaving effect of motion process variable speed, accomplished special user and carried out the demand of pull-up training under lighter state, through auxiliary exercise apparatus, let the user be in safer laborsaving motion state of stability.

Description

Labor-saving sports equipment

Technical Field

The utility model relates to the field of sports equipment, in particular to a labor-saving sports equipment.

Background

Under the requirements of mass exercise and medical recovery, various training auxiliary devices are designed and popularized and put into use, and the auxiliary devices provide a small convenience for the body building efficiency of a user no matter used for physical exercise or exercise capacity recovery. The pull-up is a middle-high-strength upper limb and waist and abdomen exercise mode, and can be carried out only by a certain instrument support, especially when a patient with underage or leg injury is recovered, the lower limb strength is weak to cause an auxiliary instrument to be necessary, and a horizontal bar with a seat or a pull-down device is generally selected to be matched with other protective measures to realize the requirement, but for children, teenagers, patients, weak limb strength and mobility impaired persons, the special groups often do not simply face the middle-high-strength exercise, even can not complete the exercise by the upper limb strength of the special groups, the exercise efficiency is influenced, and the safety can not be ensured when one person exercises, so the sitting-up auxiliary exercise instrument capable of carrying out certain labor-saving adjustment is designed, and the user can carry out sitting-up and labor-saving pull-up exercise according to the needs of the user.

Disclosure of Invention

This section is intended to summarize some aspects of embodiments of the utility model and to briefly introduce some preferred embodiments, which may be simplified or omitted in this section, as well as the description abstract and the title of the utility model, to avoid obscuring the objects of this section, description abstract and the title of the utility model, which is not intended to limit the scope of this utility model.

The present utility model has been made in view of the above and/or problems existing in the prior art that these special groups are often not simple when facing the sitting-on pull-up type of exercise of medium and high intensity, and even cannot complete the exercise by the upper limb strength of the person, which affects the exercise efficiency and cannot ensure the safety when the person exercises.

Therefore, the technical problem to be solved by the utility model is to design a sitting-type pull-up auxiliary exercise device capable of being adjusted in a certain labor-saving manner according to the strength degree of a user, so that the user can safely and controllably perform sitting-type and labor-saving pull-up exercise according to the needs of the user.

In order to solve the technical problems, the utility model provides the following technical scheme: a transmission assembly comprising a pull rod for longitudinal extension of the arm;

the bearing rod is positioned below the pull rod and used for bearing the weight of a human body;

the first rotating piece is movably connected with the pull rod, and the movement of the pull rod drives the first rotating piece to rotate;

the second rotating piece rotates synchronously with the first rotating piece, the second rotating piece is movably connected with the bearing rod, and the rotation of the second rotating piece drives the bearing rod to move along the opposite direction of the pull rod;

and the adjusting assembly is used for adjusting the angular speeds of the first rotating piece and the second rotating piece.

As a preferred embodiment of the present utility model, a power saving exercise machine, wherein: the adjusting assembly comprises a speed changing component, wherein the speed changing component is provided with an input end and an output end;

the input end and the first rotating piece rotate coaxially, and the output end and the second rotating piece rotate coaxially.

As a preferred embodiment of the present utility model, a power saving exercise machine, wherein: the first rotating member and the second rotating member are gears;

the first driven rotating piece is meshed with a gear connected with the first rotating piece through an upper toothed chain;

and the second driven rotating piece is meshed with the gear connected with the second rotating piece through a lower toothed chain.

As a preferred embodiment of the present utility model, a power saving exercise machine, wherein: the adjusting component comprises a frame, a first cavity is formed in the top of the frame, second cavities are formed in two sides of the frame, the fixed rod is fixedly arranged in the first cavity, and the speed changing component is arranged in the second cavity;

the first driven rotating piece is symmetrically fixed at the close end of the fixed rod;

the second driven rotating member is fixed in the second cavity by a short rod.

As a preferred embodiment of the present utility model, a power saving exercise machine, wherein: the lower toothed chains are connected through the bearing rods, and the upper toothed chains are connected through the pull rods.

As a preferred embodiment of the present utility model, a power saving exercise machine, wherein: the number of teeth and the radius of the first driven rotating member are equal to those of the second driven rotating member, and the number of teeth and the size of the first rotating member are equal to those of the second rotating member.

As a preferred embodiment of the present utility model, a power saving exercise machine, wherein: the input end and the output end are arranged in parallel and are both rotationally connected to the inner wall of the second cavity.

As a preferred embodiment of the present utility model, a power saving exercise machine, wherein: the bearing rod, the fixed rod, the short rod and the lower pull rod are mutually parallel.

As a preferred embodiment of the present utility model, a power saving exercise machine, wherein: a movable cavity is arranged between the second cavities at two sides in the frame.

As a preferred embodiment of the present utility model, a power saving exercise machine, wherein: the bearing rod is oriented on the lower toothed chain in the same direction as the lower pull rod is oriented on the upper toothed chain.

The utility model has the beneficial effects that: through gear tooth chain conduction force, change into the relative motion of two poles to get the laborsaving effect of motion process variable speed, accomplished special user and carried out the demand of pull-up training under lighter state, through auxiliary exercise apparatus, let the user be in safer laborsaving motion state of stability.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the description of the embodiments will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art. Wherein:

FIG. 1 is a schematic view of a power saving exercise apparatus according to one embodiment of the present utility model;

FIG. 2 is a schematic diagram of a rear side view of a power saving exercise apparatus according to one embodiment of the present utility model;

FIG. 3 is a schematic diagram illustrating a front view of a power saving exercise apparatus according to an embodiment of the present utility model;

FIG. 4 is a schematic view of a power saving transmission component of a power saving exercise apparatus according to an embodiment of the present utility model;

FIG. 5 is a schematic diagram illustrating a left side view of an adjustment member of a power saving exercise apparatus according to one embodiment of the present utility model;

fig. 6 is a schematic diagram illustrating a right side view of an adjusting member of a power saving exercise apparatus according to an embodiment of the present utility model.

Fig. 7 is a simplified schematic structural diagram of a transmission assembly of a power saving exercise apparatus according to an embodiment of the present utility model.

Detailed Description

In order that the above-recited objects, features and advantages of the present utility model will become more readily apparent, a more particular description of the utility model will be rendered by reference to specific embodiments thereof which are illustrated in the appended drawings.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present utility model, but the present utility model may be practiced in other ways other than those described herein, and persons skilled in the art will readily appreciate that the present utility model is not limited to the specific embodiments disclosed below.

In the following detailed description of the embodiments of the present utility model, reference is made to the accompanying drawings, which form a part hereof, and in which are shown by way of illustration only, and in which is shown by way of illustration only, and in which the scope of the utility model is not limited for ease of illustration. In addition, the three-dimensional dimensions of length, width and depth should be included in actual fabrication.

Further still, reference herein to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic may be included in at least one implementation of the utility model. The appearances of the phrase "in one embodiment" in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments.

Example 1

Referring to fig. 1-7, the present embodiment provides a power saving exercise apparatus comprising a transmission assembly 100, which is an overall auxiliary exercise apparatus, a pull-up base assembly for performing power saving, including a pull rod 101 for performing longitudinal stretching of the arm of a user;

the bearing rod 102 is arranged below the pull rod 101 and is used for bearing the weight of a user, and the user can basically pull the pull rod 101 upwards in an end sitting state by sitting on the bearing rod 102;

the first rotating member 103 is movably connected with the pull rod 101, so that the movement of the pull rod 101 drives the first rotating member 103 to rotate, wherein the first rotating member 103 can be a gear, a turntable, or a component capable of performing circular movement around a rotating shaft of the first rotating member, the pull rod 101 can be a toothed bar on the gear, a holding rod on the turntable, or the like can follow the circular movement of the first rotating member 103, and a component capable of generating longitudinal displacement movement change;

the second rotating member 104 is kept linked with both the first rotating member 103, and the second rotating member 104 may be a gear meshed with the first rotating member 103 or another turntable with the same power source as the turntable;

the second rotating member 104 is movably connected with the bearing rod 102, and the rotation of the second rotating member 104 drives the bearing rod 102 to move along the opposite direction of the pull rod 101, that is, when the second rotating member 104 rotates, the bearing rod 102 and the pull rod 101 can move in opposite directions or back to back;

the adjusting assembly 200 is used for adjusting the rotation speeds of the first rotating member 103 and the second rotating member 104, so that the rotation speeds of the first rotating member 103 and the second rotating member are the same or divided into three, and when a user sits on the bearing rod 102 and pulls the pull rod 101, according to the above explanation of the movement, three situations exist:

(1) the first rotating piece 103 and the second rotating piece 104 have the same rotating speed under the adjustment of the adjusting assembly 200, so that the labor saving degree is moderate;

(2) the first rotating member 103 has a larger angular velocity than the second rotating member 104, so that the labor saving degree is smaller;

(3) the first rotating member 103 has a smaller angular velocity than the second rotating member 104, thereby saving a greater degree of effort.

Example 2

Referring to fig. 1-7, a second embodiment of the present utility model is based on the previous embodiment, and differs from the previous embodiment in that:

the adjusting assembly 200 comprises a speed changing part 201, the speed changing part 201 is a similar speed changing box, the working principle of the speed changing part is basically consistent with that of an automobile speed changing box, and the speed controlling effect is achieved by meshing two groups of wheel groups with different sizes and radiuses and providing gear shifting by a speed changing handle;

in the technical scheme, the force required to be consumed when a user applies force on equipment is changed simply by a speed changing principle of a speed changing box, the speed changing box serving as a speed changing component 201 is provided with an input end 201a and an output end 201b, the input end 201a is one end of an upper meshing wheel set, and the output end 201b is one end of a lower meshing wheel set;

the input end 201a rotates coaxially with the first rotating member 103, that means, when the user pulls the pull rod 101, the input end 201a is driven to rotate, and the output end 201b rotates coaxially with the second rotating member 104, so that when the pull rod 101 is pulled, the movement of the bearing rod 102 and the second rotating member 104 drives the output end 201b to rotate, and according to the internal gearbox-like structure of the speed changing member 201, the user can determine which of the three conditions described in embodiment 1 is adopted in the movement process by adjusting the gear, thereby controlling the labor saving degree.

Example 3

Referring to fig. 1-7, a third embodiment of the present utility model is based on the previous embodiment, and differs from the previous embodiment in that:

the first rotary member 103 and the second rotary member 104 are gears with a certain number of teeth in my technical solution;

the first driven rotating member 202 is a gear meshed with the first rotating member 103 through the upper toothed chain 202a, that is, the first driven rotating member 202 rotates synchronously with the first rotating member 103, and the upper toothed chain 202a ensures that the linear speeds of the first driven rotating member and the first driven rotating member are the same;

the second driven rotating member 203 is engaged with a gear connected to the second rotating member 104 via a lower toothed chain 203a, and similarly, the second driven rotating member 203 and the gear are rotated synchronously, and the linear velocity is the same.

The first driven rotating member 202 is fixed above the first rotating member 103, the first driven rotating member 202 is meshed with the first rotating member 103 through an upper toothed chain 202a, that is, the pulling stress of the upper toothed chain 202a drives the first driven rotating member 202 to rotate together with the first rotating member 103, and the second driven rotating member 203 is meshed with the second rotating member 104 through a lower toothed chain 203a, that is, the pulling stress of the upper toothed chain 202a causes the first rotating member 103 to rotate, so that the rotation of a lower meshing wheel set is driven, that is, the second rotating member 104 rotates, so that the second driven rotating member 203 rotates, and the lower toothed chain 203a receives corresponding pulling force.

Example 4

Referring to fig. 1-6, a fourth embodiment of the present utility model is based on the previous embodiment, and differs from the previous embodiment in that: the top of the frame 204 is provided with a first cavity 204a, the frame 204 is a shell part of the whole exercise equipment and is also responsible for bearing other components, the first cavity 204a is a closed space at the top and is used for bearing the first driven rotating part 202 and a matched component fixing rod 205 thereof, two sides of the first driven rotating part are provided with second cavities 204b and are also closed spaces belonging to bearing components, the speed changing assembly 100 is arranged in the second cavities 204b, and a perforation is arranged between the first cavity 204a and the second cavities 204b at two sides of the first cavity, so that the upper toothed chain 202a can pass through and exist and operate in the two cavities;

in detail, the first driven rotating member 202 is symmetrically fixed to the fixing rod 205 near the end, that is, the fixing rod 205 is fixed to the first cavity 204a, and the first driven rotating member 202 is symmetrically disposed at both ends, the second driven rotating member 203 is fixed to the second cavity 204b through the short rod 203b, the short rod 203b plays a role of stabilizing the second driven rotating member 203, and the rotation shaft of the second driven rotating member 203 is also the short rod 203b.

Example 5

Referring to fig. 1-4, for a fifth embodiment of the present utility model, there is provided a laborsaving exercise apparatus, the embodiment being based on the previous embodiment and differing from the previous embodiment in that: the lower toothed chains 203a in the second cavities 204b on both sides are connected by the bearing bar 102, the bearing bar 102 is the part on which the user sits when the user needs to pull up, and is used for bearing the user, and the bearing bar 102 is fixed between the two lower toothed chains 203a, that is, the operation of the lower toothed chains 203a applies a force to the user, which is also an important ring for achieving labor saving.

The upper toothed chains 202a on two sides are connected through the pull rod 101, the pull rod 101 is a bar part required to be pulled when a user needs to pull up, the user sits on the bearing rod 102 and hangs the pull rod 101 by using an upper limb, then force is exerted, at the moment, the upper toothed chain 202a is forced to run, so that the first gear 101b-1 is rotated, then the second rotary piece 104 is rotated, and the transmission is transmitted to the second driven rotary piece 203, so that the lower toothed chain 203a runs, at the moment, the bearing rod 102 moves upwards to support the user, so that the labor-saving effect is achieved, and meanwhile, the force exerted by the user has certain inertia due to the cooperation of the toothed chains, so that the labor-saving effect is also achieved;

for example, in use, a gear configuration is adopted in which the ratio of the radius of the gear of the upper meshing wheel set to the radius of the gear of the lower meshing wheel set is 2:1, so that when the user pulls the pull rod 101, the upper meshing wheel set rotates one turn, and the lower meshing wheel set rotates two turns, so that an acceleration with twice the force effect is provided upwards on the bearing rod 102, and the user is lifted, thereby achieving greater labor saving.

Example 6

Referring to fig. 1-4, for a sixth embodiment of the present utility model, there is provided a laborsaving exercise apparatus, the embodiment being based on the previous embodiment and differing from the previous embodiment in that: the number of teeth and the radius of the first rotating member 103 and the second rotating member 104 are equal, so that the ratio of gears in the speed changing component 201 can be transmitted by the output end and the input end in equal ratio, the deviation change of labor saving ratio can not occur, and the labor saving degree can be conveniently determined;

the number of teeth and the radius of the first driven rotating member 202 and the second driven rotating member 203 are equal, and the consistency of the two driving wheels is also used for ensuring the equal ratio conduction of output and input and avoiding deviation.

Meanwhile, the number of teeth and the radius of the first driven rotating member 202 and the second driven rotating member 203 are equal, which means that the linear speeds of the first rotating member 103 and the second rotating member 104 are completely equal, but the angular speeds are adjusted by the speed changing component 201, so that the labor saving of different degrees is realized, and the characteristics of the technical scheme, namely the mode of changing the relationship between the angular speeds, are more perfectly explained, namely the gear shifting adjustment is performed by the internal meshing wheel set of the speed changing component 201.

Example 7

Referring to fig. 1-4, a seventh embodiment of the present utility model provides a power saving exercise apparatus, which is based on the previous embodiment and differs from the previous embodiment in that: the input end 201a and the output end 201b are arranged in parallel and are fixedly connected to the inner wall of the second cavity 204b, the input end 201a is used as the end of the upper meshing wheel set, the shaft of the input end is a wheel set shaft lever, the shaft lever passes through the speed change part 201 from one side, and is fixed on the inner wall of the second cavity 204b, the output end 201b is used as the end of the lower meshing wheel set, and similarly, the shaft lever passes through the other side of the adjusting part and is fixed on the inner wall of the other side of the second cavity 204 b;

in detail, the parallel arrangement of the two is also used for ensuring that the meshing of the two wheel sets is stable and the force transmission is accurate, and simultaneously, the labor-saving efficiency is convenient to adjust, and the deviation caused by angle deviation can not occur.

Example 8

Referring to fig. 1-4, for an eighth embodiment of the present utility model, there is provided a laborsaving exercise apparatus, the embodiment being based on the previous embodiment and being different from the previous embodiment in that: the bearing rod 102, the fixing rod 205, the short rod 203b and the pull rod 101 are arranged in parallel, the bearing rod 102 and the pull rod 101 are required to be kept in parallel, when a user is convenient to pull up, the action is standard, waist and abdomen damage cannot be caused in the stretching process, the fixing rod 205 and the short rod 203b respectively determine the position relation of the first driving rod 201 and the second driving rod 202, and the first driving rod 201 and the second driving rod 202 are required to be kept in parallel, so that labor saving and efficiency stability can be guaranteed.

Example 9

Referring to fig. 1-4, for a ninth embodiment of the present utility model, there is provided a laborsaving exercise apparatus, the embodiment being based on the previous embodiment and being different from the previous embodiment in that: a movable chamber 207 is provided between the second chambers 204b on both sides in the frame 204, and the frame 204 is provided with three spaces in total for carrying the first driven rotation member 202 and the first chamber 204a of the fixed lever 205; the second cavity 204b is used for carrying the entire transmission assembly 100 and the second driven rotating member 203, while the upper toothed chain 202a is located at one end of the first cavity 204a and at one end of the second cavity 204b, the third cavity 207 is used for allowing a user to seat and perform a deployment action to connect, and not the first cavity 204a and the second cavity 204b are closed spaces, and the load-bearing rod 102 and the pull rod 101 are mainly located in the third cavity 207 and are contacted and forced by the user.

Example 10

Referring to fig. 1-7, for a tenth embodiment of the present utility model, there is provided a laborsaving exercise apparatus, the embodiment being based on the previous embodiment and differing from the previous embodiment in that: the direction of the bearing rod 102 on the lower toothed chain 203a is consistent with the direction of the pull rod 101 on the upper toothed chain 202a, and the opposite rotation direction can be realized in the gear engagement relationship, so that the motion transmission relationship of the pull rod 101 pulling down and the bearing rod 102 lifting is ensured, and the labor saving effect is ensured.

Example 11

Referring to fig. 7, for an eleventh embodiment of the present utility model, there is provided a laborsaving exercise apparatus, which is based on the previous embodiment and is different from the previous embodiment in that: according to claim one of the simplest models from which my technical solutions can be derived, for example:

the first rotating member 103 and the second rotating member 104 are two rotating discs with friction force, the pull rod 101 is fixed on the first rotating member 103, the bearing rod 102 is fixed on the second rotating member 104, when a user applies downward force to the pull rod 101, as the claim says, the first rotating member 103 and the second rotating member 104 rotate simultaneously, and then the whole bearing rod 102 and the pull rod 101 are driven to move towards each other, and the user sits on the bearing rod 102 and can be naturally supported, so that the labor-saving effect is achieved.

The adjusting assembly 200 is fixed with a plurality of discs with different radii, and the angular velocity relationship of the two contacted rotating members can be determined by removing other discs and replacing the outermost disc, so as to complete the adjustment and control speed, thereby determining the difference of labor saving effects.

It is important to note that the construction and arrangement of the utility model as shown in the various exemplary embodiments is illustrative only. Although only a few embodiments have been described in detail in this disclosure, those skilled in the art who review this disclosure will readily appreciate that many modifications are possible, variations in mounting arrangements, use of materials, colors, orientations, etc. without materially departing from the novel teachings and advantages of the subject matter described in this application. For example, elements shown as integrally formed may be constructed of multiple parts or elements, the position of elements may be reversed or otherwise varied, and the nature or number of discrete elements or positions may be altered or varied. Accordingly, all such modifications are intended to be included within the scope of present utility model. The order or sequence of any process or method steps may be varied or re-sequenced according to alternative embodiments. In the claims, any means-plus-function clause is intended to cover the structures described herein as performing the recited function and not only structural equivalents but also equivalent structures. Other substitutions, modifications, changes and omissions may be made in the design, operating conditions and arrangement of the exemplary embodiments without departing from the scope of the present utility models. Therefore, the utility model is not limited to the specific embodiments, but extends to various modifications that nevertheless fall within the scope of the appended claims.

Furthermore, in an effort to provide a concise description of the exemplary embodiments, all features of an actual implementation may not be described.

It should be appreciated that in the development of any such actual implementation, as in any engineering or design project, numerous implementation-specific decisions may be made. Such a development effort might be complex and time consuming, but would nevertheless be a routine undertaking of design, fabrication, and manufacture for those of ordinary skill having the benefit of this disclosure.

It should be noted that the above embodiments are only for illustrating the technical solution of the present utility model and not for limiting the same, and although the present utility model has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the technical solution of the present utility model may be modified or substituted without departing from the spirit and scope of the technical solution of the present utility model, which is intended to be covered in the scope of the claims of the present utility model.

Claims (10)

1. A labor-saving exercise machine, which is characterized in that: comprising the steps of (a) a step of,

a transmission assembly (100) comprising a pull rod (101) for longitudinal stretching of an arm;

the bearing rod (102) is positioned below the pull rod (101) and is used for bearing the weight of a human body;

the first rotating piece (103) is movably connected with the pull rod (101), and the first rotating piece (103) is driven to rotate by the movement of the pull rod (101);

the second rotating piece (104) rotates in linkage with the first rotating piece (103), the second rotating piece (104) is movably connected with the bearing rod (102), and the rotation of the second rotating piece (104) drives the bearing rod (102) to move along the opposite direction of the pull rod (101);

an adjustment assembly (200) for adjusting the angular speed of the first (103) and second (104) rotary members.

2. A power saving exercise machine as claimed in claim 1, wherein: the adjusting assembly (200) comprises a speed changing component (201), wherein the speed changing component (201) is provided with an input end (201 a) and an output end (201 b);

the input end (201 a) rotates coaxially with the first rotating member (103), and the output end (201 b) rotates coaxially with the second rotating member (104).

3. A power saving exercise machine as claimed in claim 2, wherein: the first rotating member (103) and the second rotating member (104) are gears;

a first driven rotating member (202) and a gear connected with the first rotating member (103) in a meshing manner through an upper toothed chain (202 a);

and a second driven rotating member (203) which is in meshed connection with the second rotating member (104) through a lower toothed chain (203 a).

4. A power saving exercise machine according to claim 3, wherein: the adjusting assembly (200) comprises a frame (204), a first cavity (204 a) is formed in the top of the frame (204), second cavities (204 b) are formed in two sides of the frame, a fixing rod (205) is fixedly arranged in the first cavity (204 a), and the speed changing component (201) is arranged in the second cavity (204 b);

the first driven rotating piece (202) is symmetrically fixed at the close end of the fixed rod (205);

the second driven rotation member (203) is fixed in the second cavity (204 b) by a short rod (203 b).

5. The effort-saving game apparatus of claim 4, wherein: the lower toothed chains (203 a) are connected through the bearing rod (102), and the upper toothed chains (202 a) are connected through the pull rod (101).

6. The effort-saving game machine of claim 5, wherein: the number of teeth and the radius of the first driven rotating member (202) and the second driven rotating member (203) are equal, and the number of teeth and the size of the first rotating member (103) and the second rotating member (104) are equal.

7. The effort-saving game apparatus of claim 6, wherein: the input end (201 a) and the output end (201 b) are arranged in parallel and are both rotatably connected to the inner wall of the second cavity (204 b).

8. A power saving exercise machine as claimed in claim 7, wherein: the bearing rod (102), the fixing rod (205), the short rod (203 b) and the pull rod (101) are arranged in parallel.

9. A power saving exercise machine as claimed in claim 8, wherein: a movable cavity (206) is arranged between the second cavities (204 b) at two sides in the frame (204).

10. A power saving exercise machine as claimed in claim 9, wherein: the bearing rod (102) is oriented on the lower toothed chain (203 a) in accordance with the orientation of the pull rod (101) on the upper toothed chain (202 a).