CN110898386A - Sports apparatus with parallel or alternate driving of left and right pedal cranks and related linkage structure thereof - Google Patents

Abstract

The included left and right pedal cranks and the related linkage structure thereof adopt the sports apparatus driven in parallel or alternately, by the eccentric cam type or other suitable crank return structure systems or the corresponding crank angle changing mechanisms, the left pedal crank, the right pedal crank, the left elliptical (or circular) motion pedal which can be driven by the left pedal crank, the right pedal crank, the left manual swing arm structure and the right manual swing arm structure of the related sports equipment adopt mutually parallel or mutually alternate driving modes, and can ensure that left and right elliptical (or circular) motion pedals and the like in parallel relation can be conveniently started, and can better complete a 360-degree full-circle driving process, therefore, the corresponding exercise apparatus such as the exercise bicycle or the elliptical machine or the riding machine or the rowing machine or the bicycle and the combined exercise apparatus products which can be conveniently formed among the exercise apparatus and the elliptical machine or the riding machine or the rowing machine or the bicycle can obtain richer and more complete use functions and higher market value.

Description

Sports apparatus with parallel or alternate driving of left and right pedal cranks and related linkage structure thereof

Field of the invention

Belonging to the field of sports and fitness equipment

Background

The existing exercise equipments such as exercise bicycle, elliptical machine, bicycle, etc. generally adopt the alternating driving state of 180 degrees of left and right cranks, some exercise bicycle, bicycle can also adopt the parallel driving state of the left and right cranks in the same direction, but when adopting parallel driving, the waiting position of the pedal crank will greatly affect the starting of the whole moving process, if the waiting position is not suitable, the moving process can not be started, meanwhile, generally, the single treading process can only realize half-cycle driving, even if a specially-made pedal system capable of 360 degrees full-cycle driving is adopted, the driving force formed in the belt lifting driving process is relatively obviously smaller, which will form a contradiction, if the movement resistance is set to be larger, the movement speed in the belt lifting driving process will obviously slow down, the equilibrium of movement is very poor, even the whole belt lifting driving process and the whole 360 degrees driving process can not be completed, if the movement resistance is too small, the robot is easy to empty because the driving force in the process of treading by the feet in parallel is relatively obviously larger. Thus, a very obvious contradiction is formed and becomes a key problem for restricting the balanced and complete process of the parallel driving of the two feet and the better development and application of relevant exercise machines such as exercise bicycles, elliptical machines, bicycles and the like. If a standing parallel driving mode is further considered to be adopted on elliptical machines, exercise bicycles, bicycles and other apparatuses which can adopt a standing driving mode, the starting and the better completion of the whole motion process become very important, and the crank has a better position to be started and strong natural return capability. The scheme can well solve the contradiction and the problem by providing corresponding crank return structure systems in the forms of a pull rope type, an eccentric top wheel type and the like, so that the parallel driving mode between structures of a left pedal crank, a right pedal crank and the like can be better realized on sports apparatuses such as exercise bicycles, elliptical machines, bicycles and the like, and the related sports apparatuses which can simultaneously realize the parallel driving mode and the alternate driving mode are greatly developed.

Objects of the invention

The invention aims to provide the following steps: the left and right pedal cranks of sports equipment such as exercise bicycles, elliptical machines and the like and other corresponding left and right linked motion structures can well realize the motion exercise mode of mutual parallel synchronous driving or mutual alternate driving, thereby better enriching the use functions of the related sports equipment, forming a better and richer exercise process, better meeting the needs of people and also obviously improving the value of related products.

Summary of the invention

The purpose of the invention is realized as follows: the corresponding sports apparatus can be composed of a bracket structure, a left pedal crank, a right pedal crank, a pedal crank pivot, a left pedal, a right pedal, a motion transmission and linkage mechanism, a motion resistance-damping structure and other corresponding structural systems; the method is characterized in that: through the corresponding eccentric cam type or other suitable crank return structure system or the corresponding angle changing mechanism, the left and right pedal cranks or the left and right elliptical or circular motion pedal structure driven by the left and right pedal cranks or the left and right manual swing arm structure. The related sports apparatus is a horse riding machine, a body building vehicle, an elliptical machine, a rowing machine, a bicycle or other suitable sports apparatuses or a multifunctional sports apparatus formed by mutually integrating the two sports apparatuses.

The left pedal crank and the right pedal crank are fixedly connected in a parallel mode, or the left pedal crank and the right pedal crank are driven in parallel or driven alternately by 180 degrees or in other suitable adjustable connection angle relations by the regulation and control of correspondingly arranged angle changing mechanisms.

The corresponding angle-changing mechanism is arranged between the pedal crank structure and the pedal crank central shaft structure, or between the pedal crank structure and the corresponding crank shaft structure or the eccentric bearing structure or the eccentric cam structure of the pedal crank return structure system, or on other suitable structure positions.

The corresponding eccentric cam type crank return structure system is a corresponding elastic crank return structure system with return force provided by a spring, a corresponding gravity crank return structure system with return force provided by gravity, or a corresponding crank return structure with combined and coacted elastic force and gravity.

By arranging an eccentric cam type or other suitable crank return structure systems, the left pedal crank and the right pedal crank which are in a parallel state can be automatically positioned above the central shaft of the pedal crank, so that the left pedal crank, the right pedal crank, the left and right circular motion pedals or the left and right elliptical motion pedals or other corresponding structures are in an optimum waiting motion state. Meanwhile, through the addition and subtraction of the spring or gravity return force, the left and right circular motion pedals or the left and right elliptical motion pedals or other corresponding structures which are in parallel relation can be ensured to better complete the 360-degree full-circle driving process, and the stress process of the whole motion is more balanced.

The corresponding eccentric cam structure of the eccentric cam type crank return structure system is directly or indirectly connected with the pedal crank middle shaft structure, or directly or indirectly connected with the left pedal crank structure and the right pedal crank structure.

And one end of the return connecting rod structure is pivoted or connected with the corresponding top wheel structure of the eccentric cam type crank return structure system, and the other end of the return connecting rod structure is connected with a return connecting rod swing arm structure or other suitable structures or is matched with a corresponding return connecting rod track structure through a corresponding roller structure.

A corresponding saddle structure or a corresponding foot structure or both can be arranged on the return connecting rod structure.

The return connecting rod structure is directly or indirectly connected with a corresponding elastic force or gravity return structure system or a return structure system with the combination of the elastic force and the gravity.

On the respective exercise machine, an eccentric cam crank return structure system may be used independently, or in combination with a respective inertial energy storage structure, or in cooperation with another suitable form of crank return structure system.

The left pedal crank structure and the right pedal crank structure are respectively provided with independent crank return structure systems in corresponding forms or are provided with the same set of crank return structure systems in corresponding forms.

A left and a right hand-operated swing arm structures are provided which can be connected with the left and the right pedal crank structures respectively and directly or indirectly.

The corresponding circular motion pedal structure or the elliptic motion pedal structure is arranged, one end of the elliptic motion pedal structure is pivoted with the pedal crank structure, and the other end of the elliptic motion pedal structure is matched with the elliptic motion pedal swing arm structure or other suitable structures or the corresponding elliptic motion pedal track structure through the corresponding roller structure.

A corresponding elliptical motion pedal structure and a corresponding manual swing arm structure are arranged, one end of the elliptical motion pedal structure is pivoted with the pedal crank structure, and the other end or other suitable parts are directly or indirectly connected with the manual swing arm structure.

The manual swing arm structure is directly pivoted with the corresponding elliptical motion pedal structure or is directly connected with the elliptical motion pedal structure through the corresponding manual swing arm connecting rod structure; one end of the manual swing arm connecting rod structure is pivoted with the lower end of the manual swing arm structure through a connecting rod-swing arm pivot structure, and the other end of the manual swing arm connecting rod structure is pivoted with the elliptical motion pedal structure through a connecting rod-pedal pivot structure, so that a corresponding exercise machine comprising the structure and the function of a complete elliptical machine is formed.

The eccentric top wheel type crank return structure system can be matched with other structure systems of related products to form a corresponding exercise bicycle or elliptical machine or horse riding machine or bicycle or other suitable sports equipment products.

On the corresponding body-building vehicle or elliptical machine or other suitable products, the corresponding hand-operated rocker arm structure, hand-operated rocker arm handle structure and other related structures are arranged, so that the body-building vehicle or elliptical machine product or body-building vehicle-elliptical machine combined product which contains the hand-operated rocker arm structure system and can be linked by hands and feet can be formed.

On the corresponding elliptical machine or exercise bicycle or other suitable sports equipment, the structure form of sitting type sports or the structure form of standing type sports or the structure form of simultaneously realizing sitting type sports and standing type sports can be adopted.

On the corresponding elliptical machine or exercise bicycle or other suitable sports equipment, a low-position seat structure with or without a backrest can be adopted at the same time, and corresponding left and right low-position pedal plate structures matched with the low-position seat for use can be arranged at the lower ends of the left and right manual swing arm structures or the front parts of the left and right elliptical exercise pedal structures or other suitable structural positions, so that the legs of an exerciser can realize sufficient front and back stretching movement, and a better hand-foot linkage movement state can be formed.

The left and right low-position pedal structures arranged on the elliptical exercise pedal structure or other suitable structural positions can adopt a directly arranged structural form or a corresponding structural form which can be conveniently added and detached or a structural form which can be conveniently folded or other suitable hidden arrangement-a structural form which is unfolded only when in use and folded and hidden when not in use.

The relevant sports apparatus can realize electromotion at the same time, namely the relevant sports process can be realized by depending on the strength of human body, and the relevant sports process can also be realized by means of the corresponding electric driving system, so that the whole sports apparatus has the functions of strong body building and exercise, and has the functions and values of entertainment and rehabilitation;

in order to better adapt to the requirements that the human body is in different relative positions, different motion forms and the like under various conditions that standing type motion, high-position seat type motion or low-position seat type motion and the like can be adopted at the same time, the following structural systems can be further selected and arranged on the left and right manual swing arm structural systems of the corresponding elliptical machine or exercise bicycle or other suitable sports equipment:

1. the left and right hand-operated swing arms of the corresponding elliptical machine or exercise bicycle or other suitable sports equipment are additionally provided with corresponding hand-operated swing arm longitudinal-namely forward and backward movement position angle adjusting structure systems, and the upper parts of the left and right hand-operated swing arms can be more forward or backward through the adjusting function of the angle adjusting structure systems, so that different requirements formed by different movement gravity centers, movement positions and movement forms of human bodies when people stand or sit on the seat for exercise, or sit on the seat for exercise or sit on the low seat for exercise can be better met.

2. The upper parts of the left and right hand-operated swing arms can do transverse, namely, swing motion in the left-right direction or can make the upper parts of the hand-operated swing arms transversely change angles and change positions to lock, and the corresponding upper part transverse motion structure system of the hand-operated swing arms is additionally arranged on the left and right hand-operated swing arms of the corresponding elliptical machine or exercise bicycle or other suitable sports equipment.

3. An up-and-down motion swing arm structure system or an up-and-down motion sleeve structure system is additionally arranged on the left and right manual swing arms of the corresponding elliptical machine or exercise bicycle or other suitable sports equipment or on the independent manual swing arms which move transversely.

Drawings

The following description is made with reference to FIGS. 1-7:

FIG. 1 is a view of an elliptical machine (or exercise bicycle) which comprises an eccentric cam type crank return structural system, a manual swing arm structural system moving up and down and a hand and foot simultaneously driven by using a low-position saddle and a high-position saddle.

Fig. 2a and 2b are a front view and a left view of a bicycle having an eccentric top wheel type crank return structure and in a parallel driving state between left and right pedal cranks, respectively.

FIG. 3 is a view of an elliptical machine (exercise bicycle) having an eccentric cam type crank return structure system and a manual swing arm upper structure front and rear angle adjustable system, and left and right pedal cranks and the like in a parallel driving state.

Fig. 4a and 4b are views and sectional views of structural systems such as a pedal crank-center shaft of an elliptical machine or exercise bicycle including an eccentric cam type crank return structural system, respectively.

FIG. 5 is a view of an elliptical machine or exercise bicycle with an eccentric cam type crank return structure system, such as a pedal crank-eccentric cam structure system.

Fig. 6a and 6b are views of a bicycle with the eccentric cam structure of the bottom bracket shaft and the top wheel structure thereof in an interaction and fully separated state, respectively.

FIG. 7 is a view of an elliptical machine (or exercise bicycle) with an eccentric cam type crank return structure system, a manual sleeve structure system moving up and down, and a hand and foot driven by a low-position saddle and a high-position saddle.

Detailed Description

The following describes specific embodiments of the relevant exercise device and its associated structural system:

the corresponding eccentric top wheel type crank return structure can be divided into an elastic eccentric top wheel type crank return structure with a return force provided by a spring and a gravity eccentric top wheel type crank return structure with a return force provided by a weight, and the specific structural arrangement and the conditions of related sports equipment are described as follows by combining the attached drawings:

one of the specific structural conditions of an eccentric top wheel type crank return structure system and related sports equipment

According to the requirement, the left pedal crank structure 1 and the right pedal crank structure 2 can be respectively provided with an independent eccentric cam type crank return structure system.

As shown in the attached figure 2, a left eccentric top wheel structure 19 and a right eccentric top wheel structure 20 which are connected with and linked with the left crank structure 1 and the right crank structure 2 are respectively arranged on proper positions of corresponding sports equipment such as a bicycle, an exercise bicycle or an elliptical machine, the peripheral action outline of the left eccentric top wheel structure and the peripheral action outline of the right eccentric top wheel structure are in an asymmetrical eccentric arrangement form relative to the axle center of the left crank middle shaft structure 3 and the right crank middle shaft structure 3, under the direct or indirect action of spring force or gravity or other suitable force, the corresponding left and right push wheel structures 21 and 22 respectively and directly push against the eccentric peripheral profiles of the left and right eccentric top wheel structures 19 and 20, so that the left eccentric crown wheel 19, the right eccentric crown wheel 20, the left crank structure 1 and the right crank structure 2 which are connected and linked with the left eccentric crown wheel and the right eccentric crown wheel can be positioned at the required proper angle position to be moved, thereby realizing the required process of pedal crank return and pedal crank full-circle motion acting force equalization.

The left and right push wheel structures 21, 22 may be directly under the elastic force of the spring 23 or the gravity or other suitable force of the respective weights on the corresponding exercise machine such as an exercise bike, bicycle, etc. (as in the case shown in fig. 2).

On the corresponding exercise device such as elliptical machine, exercise bicycle, etc., the left and right push wheel structures 21, 22 can be indirectly under the action of the elastic force of the springs 9, 10 or the corresponding gravity or other suitable force through the corresponding push swing rod structure 24 or the pull cable, etc. (as in the case shown in figure 1).

The left and right push wheel structures 21 and 22 are directly under the action of spring force or gravity or other suitable force, or indirectly under the action of spring force or gravity or other suitable force through corresponding structures such as a swing rod, a pull cable and the like. (as in the case shown in figures 1 and 2, respectively).

Although the eccentric top wheel type crank return structure system can easily generate uncomfortable vibration which can be felt by a human body, if a larger pushing guide wheel is arranged and the smoothness of the outer contour action surface of the eccentric top wheel is higher, the phenomenon of poor vibration can be well avoided, meanwhile, the pushing guide wheel can also generate large return acting force and return acting capacity under the direct action of larger force such as spring force and the like, and the acting force of a spring and the like can be adjusted, so that the return force and the return capacity of the crank can be adjusted, and the requirement can be better met.

The eccentric top wheel type crank return structure system can be matched with other structure systems of related products to form corresponding sports equipment products such as bicycles, elliptical machines, exercise bicycles and the like, wherein the corresponding sports equipment products comprise the eccentric top wheel type crank return structure system. (as shown in figures 1, 2, etc.).

Second), eccentric top wheel type crank return structure system and second concrete structure condition of relevant sports apparatus

According to the requirement, the left pedal crank structure 1 and the right pedal crank structure 2 can share the same eccentric cam type crank return structure system.

As shown in fig. 3 and 4, an eccentric cam structure 19 connected with and linked with the left or right crank structure 1 or 2 is arranged on the corresponding exercise apparatus, the peripheral action profile of the eccentric cam structure 19 is in an asymmetric eccentric arrangement form relative to the axle center of the left or right crank central axle structure 3, and a corresponding top wheel structure 21 directly pushes the eccentric peripheral profile of the eccentric cam structure 19 under the direct or indirect action of spring force or gravity or other appropriate force, so that the eccentric cam structure 19 and the connected and linked left or right crank structure 1 or 2 can be positioned on the required appropriate angle position to be actuated, thereby realizing the processes of automatic return of the pedal crank and equalization of the acting force of the full-cycle motion of the pedal crank.

On a corresponding exercise machine such as an exercise bike, bicycle, etc., the top wheel structure 21 may be directly under the force of the spring of the corresponding spring or the weight of the corresponding weight or other suitable force.

On the corresponding exercise apparatus such as elliptical machine, exercise bicycle, etc., the top wheel structure 21 can be indirectly under the action of the elastic force of the spring 9 or the corresponding gravity or other suitable force through the corresponding pushing swing rod structure 24 or the pull cable, etc. (as in the case shown in fig. 3).

In the above situation, the left and right pedal crank structures 1 and 2 which can be driven in parallel can share the same eccentric cam crank return structure system, when the left and right pedal crank structures 1 and 2 are driven alternately in 180 degrees relative relationship, the acting force of the return spring structure system or the return weight block structure system can be greatly weakened or even zero by the related adjusting mechanisms such as the elastic force adjusting rod, so that the stress symmetry and the balance of the alternate driving of the left and right feet can be well ensured.

In the above case, the more specific connection and cooperation relationship between the left and right pedal crank structures 1, 2, the pedal middle axle structure 3 and the eccentric cam structure 19, the pedal driving wheel structure 70, etc. may be: the locking connection angle between the left or right pedal crank structure 1 or 2 and the pedal central shaft structure 3 can be changed by 180 degrees by arranging a lock hole structure 72 which is mutually symmetrical and has an angular position relation of 180 degrees, a lock hole structure which can be arranged on the left or right pedal crank structure 1 or 2, a corresponding lock pin structure 73 and the like on the pedal driving wheel structure 70. So that the left or right pedal crank structure 1 or 2 on this side can be adjusted in angle relatively conveniently with respect to the pedal central shaft structure 3 and the pedal crank structure and the eccentric cam structure 19 fixedly arranged on the other side thereof. Of course, other suitable or more automatic angle adjusting modes can be optionally arranged on the corresponding structures according to requirements. (as shown in fig. 4a, 4 b).

The eccentric cam structure 19 can be directly and independently arranged on the other side of the pedal middle shaft structure 3 or can be fixedly connected with the same side crank structure through a pin-shaped square hole and the like, the eccentric cam structure 19 can also be independently arranged on a corresponding eccentric cam angle-adjusting shaft path structure 74 on the other side of the pedal middle shaft structure 3, meanwhile, a plurality of lock hole structures 75 with the angle position relation of 90 degrees or 180 degrees or other suitable angles can be arranged on the eccentric cam structure 19, and the angle matching relation between the eccentric cam structure 19 and the pedal crank structure can be adjusted through the lock hole structures 75, the corresponding lock hole structures arranged on the left or right pedal crank structure 1 or 2, the corresponding lock pin structures 73 and the like, so that different requirements under different motion modes can be better met. (as shown in fig. 4a, 4 b).

The eccentric top wheel type crank return structure system can be matched with other structure systems of related products to form corresponding sports equipment products such as bicycles, elliptical machines, exercise bicycles and the like, wherein the corresponding sports equipment products comprise the eccentric top wheel type crank return structure system. (as shown in figures 3, 4, etc.).

Third), third specific structure of eccentric cam type crank return structure system and related sports apparatus

The eccentric cam structure 19 can be arranged in the middle of the pedal middle shaft structure 3 of the relevant sports apparatus, and the bearing structure, the shaft seat structure and the corresponding middle shaft seat support (framework) structure of the pedal middle shaft structure 3 can be arranged on the two sides of the eccentric cam structure. The structure forms can be combined with the specific structure forms of the bicycle or the exercise bicycle or other related sports equipment, so that the structure forms can be applied to the corresponding sports equipment.

When combined with a bicycle or exercise bike or horse riding machine or elliptical machine or other suitable sports equipment, the corresponding push rod structure 76, which is a push rod structure capable of linking with the top wheel structure 21, can be disposed in the corresponding frame structure, and the specific arrangement manner is described as follows by taking the bicycle as an example:

as shown in FIG. 6, first, the top wheel push rod structure 76 can be disposed in the bicycle frame riser structure 77 or in the frame front down tube structure, etc., in which the general bicycle saddle riser structure 101 is located. The relative directional movement of the top wheel push rod structure 78 can be ensured by the mutual matching of the top wheel push rod structure 78 and the vertical tube structure 77 of the frame or the front lower tube structure of the frame, and the like in the cross section shape or the relative structure, and meanwhile, the contact surface between the top wheel structure 21 and the eccentric cam structure 19 in a convex-concave matching mode or other suitable mutually matched appearance forms and structural forms and the like can also play a good role in controlling the directional movement of the top wheel push rod structure 76.

Secondly, the upper end edge of the top wheel push rod structure 76, which is provided with the top wheel structure 21 at the lower end of the corresponding vertical tube structure 77 of the bicycle frame, is extended out of the top of the vertical tube structure 77 of the bicycle frame, and has a length with a proper size, and meanwhile, the bicycle saddle vertical tube structure 101 can be inserted into the upper end of the top wheel push rod structure 76 through the corresponding structural arrangement. (as shown in fig. 6a, 6 b).

A frame vertical pipe quick-release quick-lock structure 78 and a top wheel push rod quick-release quick-lock structure 79 are respectively arranged at the upper end of the frame vertical pipe structure 77 and the upper end of the top wheel push rod structure 76. The bicycle saddle stand pipe structure 101 that can be inserted into the top wheel push rod structure 76 can be locked at a desired height or the like by the top wheel push rod quick release quick lock structure 79; the push rod structure 76 of the top wheel in the vertical tube structure 77 of the frame can be locked at a desired height and other positions by the quick-release locking structure 78 of the vertical tube structure of the frame, and when the quick-release locking structure 78 of the vertical tube structure of the frame is in an open state, the push rod structure 76 of the top wheel can make corresponding reciprocating motion under the action of the top wheel structure 21, the eccentric cam structure 19, the weight of the human body and the like.

Through the structural arrangement, the following purposes can be achieved: when the quick-release locking structure 78 of the vertical tube of the bicycle frame is in an open state, a riding machine movement mode that the saddle of the bicycle and the like can move up and down can be formed; when the push rod structure 76 is locked above a certain height by the quick release locking structure 78 of the vertical tube of the bicycle frame, the push rod structure 21 at the lower end of the push rod structure 76 of the push wheel is completely separated from the eccentric cam structure 19, so that the eccentric cam structure 19 rotating together with the pedal crank structure does not directly act on the push rod structure 21, the push rod structure 76 of the push wheel and the vertical tube structure 101 of the saddle, and the vertical tube structure 101 of the saddle and the saddle structure thereof can be in a completely fixed structural state. (as in the case shown in fig. 6a and 6b, respectively).

The bicycle saddle which is completely static or moves up and down can be positioned at a proper height and the like by the adjusting function of the top wheel push rod quick-release quick-locking structure 79.

The above-described configurations and corresponding principles and processes may also be applied to exercise bicycles or other suitable exercise devices.

The eccentric top wheel type crank return structure system can be matched with other structure systems of related products to form corresponding sports equipment products such as bicycles, exercise bicycles, horse riding machines, elliptical machines and the like.

Fourthly), eccentric cam type crank return structure system in symmetrical layout mode and matching condition of eccentric cam type crank return structure system and relevant sports equipment

The eccentric cam structure 19 can be generally in a symmetrical layout form with an angular position relationship of 180 degrees between the lowest point of the outer edge (the point closest to the axis) and the highest point of the outer edge (the point farthest from the axis), so that the energy storage and release working processes of the eccentric cam structure can respectively completely correspond to the working process of convenient treading driving of a pedal crank and the like in which the pedal crank moves from the highest point to the lowest point by 'front 180 degrees' and the working process of inconvenient driving or even incapability of treading driving of returning the lowest point to the highest point by 'back 180 degrees'. (as shown in figures 3, 6, etc.).

By adopting the symmetrical eccentric cam structure (19) and the corresponding eccentric cam type crank return structure system, the whole sports equipment product can better and conveniently adapt to various different requirements of various different sports modes such as a high-low saddle exercise bicycle sports mode, an elliptical machine sports mode, a rowing machine sports mode or a riding machine sports mode and the like at the same time by adjusting the relative angle matching relationship between the pedal crank and the eccentric cam structure 19 and the like.

When the motion mode of the rowing machine or the low-seat exercise bicycle mainly powered by treading forwards and backwards and the motion mode of the elliptical machine or the high-seat exercise bicycle mainly powered by treading upwards and downwards are mutually converted, the corresponding eccentric cam type crank return structure system can always provide high-efficiency return force by adjusting the relative fixed matching angle between the eccentric cam structure 19 and the corresponding pedal crank structure by 90 degrees, and the processes of motion stress and the like are always balanced.

Fifthly), eccentric cam type crank return structure system in asymmetric layout mode and matching condition of eccentric cam type crank return structure system and relevant sports equipment

In order to make the eccentric cam type crank return structure system better adapt to the motion mode of the elliptical machine and the motion mode of the exercise bicycle at the same time and better adapt to the requirement of the motion mode of a high saddle, a low saddle or even a horizontal saddle at the same time, an asymmetric layout mode with 90 degrees (270 degrees) or other suitable angle position relations can be adopted between the lowest point (the point closest to the axis) A point of the outer edge and the highest point (the point farthest from the axis) B point of the outer edge of the eccentric cam structure 19 of the corresponding eccentric cam type crank return structure system. (as shown in fig. 5).

The more specific structural condition and the corresponding working process of the eccentric top wheel type crank return structure system in the form of the asymmetrical layout separated by the angular position relation of 90 degrees (also 270 degrees) are as follows:

when the pedal structure 90 of the exercise bicycle or the elliptical machine is in the highest working position, the top wheel structure 21 just pushes the lowest point A1 of the outer edge of the eccentric cam structure 19; when the pedal structure 90 of the exercise bicycle or the elliptical machine is in the foremost working position, the top wheel structure (21) just pushes the highest point B2 of the outer edge of the eccentric cam structure 19. Therefore, no matter whether the exercise is elliptical or exercise bicycle, no matter whether the exercise is high-position saddle or low-position saddle or even horizontal saddle, in the process that the pedal structure 90 capable of best pedaling and exerting force and the like can move from the highest end to the foremost end by two feet, and the corresponding left crank structure 1, right crank structure 2 and eccentric cam structure 19 sweep the working angle of 90 degrees, the top wheel structure 21 is respectively contacted, interacted and pushed with the lowest point of the outer edge of the eccentric cam structure 19, the outer edge points of the middle transition section of 90 degrees and the highest point of the outer edge of the eccentric cam structure 19 in sequence, so that the corresponding processes of increasing the exercise resistance, increasing the power consumption and storing energy can be realized. (as shown in fig. 5).

In the process that the double-foot driving pedal structure 90 and the like return to the highest end from the foremost end to the lowest end through the lowermost end and the rearmost end, and in the process that the corresponding left crank structure 1, the right crank structure 2 and the eccentric cam structure 19 sweep through a working angle of 270 degrees, the top wheel structure 21 is respectively in contact with, interacts with and pushes against the highest point B2 of the outer edge of the eccentric cam structure 19, each point of the outer edge of the middle transition section of 270 degrees and the lowest point A1 of the outer edge of the eccentric cam structure 19 in sequence, so that the corresponding processes of increasing motion power and assisting in motion and energy release can be formed. (as shown in fig. 5).

In the whole process that the pedal crank and the like sweep through the working angle of 270 degrees, the eccentric cam structure 19 and the like increase the motion power and assist energy release, three structural forms of a contour track, a height reducing track or a slightly height increasing track can be considered to be adopted in the initial 90-degree working stroke section after the top wheel structure 21 pushes the highest point of the eccentric cam structure 19, even if the outer edge of the eccentric cam structure 19 adopts an extension structural mode with the same height as the highest point or an extension structural mode with the height reduced or an extension structural mode with the height increased by a small amount in the 90-degree range.

When an extension structure mode with equal-height tracks is adopted, corresponding additional resistance and corresponding additional power are not formed in corresponding working stroke of 90 degrees; when the extension structure mode of the height-reducing track with reduced height is adopted, corresponding additional power is formed in the corresponding 90-degree working stroke, namely the stroke stage capable of automatically returning is already entered.

When the extension structure mode of increasing the height by a small amount is adopted, corresponding smaller additional resistance is formed in the corresponding 90-degree working stroke, and in the motion mode of a low-position seat, particularly a horizontal exercise bicycle, because the non-pedaling stroke stage is already existed, the 90-degree stroke is needed to be flushed by the arrangement of the corresponding inertia structure and the action of the inertia force unless the arrangement of the corresponding double-foot lifting structure and the corresponding lifting working stroke are relied on.

After the initial working stroke of 90 degrees, namely the rest 180 degrees, a track extending structure mode of sequentially reducing the height is adopted, and the working stroke and the movement process of the automatic return of the pedal crank and the like are realized by the reserve force obtained by depending on the initial pedaling working stroke.

According to the working principle of the eccentric top wheel type crank return structure system in the asymmetric layout form with the angular position relation of 90 degrees (also 270 degrees) between the highest point and the lowest point, the eccentric top wheel type crank return structure system in the asymmetric layout form with other suitable angles between the highest point and the lowest point and the corresponding whole sports equipment product can be designed and manufactured by combining different characteristics of working processes of different sports equipment products and the like.

Six), other relevant motion structure systems of relevant sports equipment and more specific implementation mode thereof

On the corresponding sports apparatus such as elliptical machine, exercise bicycle, etc., in order to better adapt to the requirements that the human body is in different relative positions, different motion forms, etc. under various conditions such as standing motion, high-seat motion or low-seat motion, etc. can be adopted at the same time, the following structural systems can be further selected and added on the structural systems such as the left and right manual swing arms, etc.

1. The upper end of the articulated shaft 37 of the left and right hand swing arm back and forth movement of the corresponding sports apparatus such as elliptical machine or body-building vehicle is provided with a longitudinal (back and forth movement direction) angle adjusting structure system of the hand swing arm which can lead the upper parts 38, 39 of the left and right hand swing arm and the lower parts of the left and right hand swing arm to be in different angle position relations, and the upper parts 38, 39 of the left and right hand swing arm can be more forward or backward through the adjusting function of the angle adjusting structure system, thereby better meeting different requirements formed by different movement centroids, movement positions and movement forms of human bodies when people do standing exercise or sitting exercise, or do high-level seat exercise or low-level seat exercise. The longitudinal angle-adjusting structure system of the manual swing arm can be composed of a corresponding angle-adjusting framework structure 40, and an angle-adjusting pivot 41, an angle-adjusting lock hole 42, an angle-adjusting lock pin 43 and the like which are matched with the corresponding angle-adjusting framework structure. (as in the case shown in figures 1, 7).

2. The upper ends of the front and back movement articulated shafts 37 of the left and right hand-operated swing arms of the corresponding sports apparatus such as elliptical machines, exercise bicycles and the like are provided with corresponding transverse movement articulated shaft structures which can lead the upper parts 38 and 39 of the left and right hand-operated swing arms to do transverse (left and right) swinging movement or transverse angle change and displacement, or further simultaneously provided with a transverse movement and transverse angle change locking structure system which can lead the transverse swinging movement of the upper parts 38 and 39 of the left and right hand-operated swing arms to be completely locked at a plurality of proper positions.

The specific structure of the transverse movement and transverse angle modulation locking structure system of the manual swing arm can be similar to the longitudinal (front-back) angle modulation structure system of the manual swing arm, namely, a transverse movement and angle modulation pivot structure 44 at the upper part of the manual swing arm, a transverse angle modulation framework structure 45, a transverse angle modulation lock hole structure, a transverse angle modulation lock pin structure and the like can be arranged correspondingly, and meanwhile, a transverse movement resistance-damping structure 48 in a spring form or other suitable forms can be directly or indirectly arranged, so that the transverse swinging movement of the upper parts 38 and 39 of the left and right manual swing arms is in a suitable resistance and damping state; (as in the case shown in figures 1, 7).

The manual swing arm transverse motion structure system can also be designed into a relatively more independent transverse motion manual swing arm structure system.

3. An up-and-down motion swing arm structure system or an up-and-down motion sleeve structure system which can make the arms do corresponding appropriate up-and-down motion (the left and right arms) while pushing and pulling the whole left and right manual swing arm structures 32 and 33 to do forward and backward swing motion can be additionally arranged at the appropriate positions of the upper structures 38 and 39 of the left and right manual swing arms of the corresponding sports apparatus such as an elliptical machine or a body-building vehicle in a pivoting or sleeving manner. (as in the cases shown in figures 1, 7, respectively).

And a corresponding up-down motion swing arm structure system or an up-down motion sleeve structure system can be additionally arranged on the manual swing arm structure which moves transversely relatively more independently.

The up-and-down motion swing arm structure system can be composed of corresponding left and right up-and-down motion swing arm structures 49 and 50 which can be directly arranged on the upper structures 38 and 39 of the left and right manual swing arms or arranged on other suitable structure positions, a left and right up-and-down motion swing arm pivot structure 51, a left and right up-and-down motion swing arm handle structure 52, and corresponding up-and-down motion swing arm locking structures 53 which can selectively lock the left and right up-and-down motion swing arms at a certain required angle position according to requirements, and simultaneously, the up-and-down motion swing motion of the left and right up-and-down motion swing arm structures 49 and 50 can be in a suitable resistance and damping state through directly or indirectly arranging corresponding resistance-damping structures 54 of the up-and-down motion swing arms. (as in the case shown in figure 1).

A straight pipe type or equal-circle-center bent pipe (bent sleeve) type up-and-down movement sleeve structure system can be directly sleeved on the upper structures 38 and 39 of the left and right manual swing arms of the straight rod type or the equal-circle-center bent pipe type, the up-and-down movement sleeve structure system can be composed of an up-and-down movement sleeve structure 55, an up-and-down movement sleeve handle structure 56 or an up-and-down movement sleeve resistance-damping structure or a corresponding up-and-down movement sleeve structure locking structure 58, and the up-and-down movement sleeve structure 55 is directly sleeved on the straight rod type or equal-circle-center bent rod type related structure parts of the upper structures 38 and 39 of the left and right manual swing arms; the up-down movement sleeve handle structure 56 is disposed directly or indirectly on the up-down movement sleeve structure 55; the up and down motion sleeve resistance-damping structure may be a spring structure 57 or other suitable structure (as in the case of fig. 7) that is sleeved directly over the associated structural portions of the straight or iso-centre curved bars of the upper structures 38, 39 of the left and right hand swing arms.

Claims (10)

1. The included left and right pedal cranks and the related linkage structures thereof adopt sports equipment driven in parallel or alternatively, and the sports equipment consists of a bracket structure, the left and right pedal cranks, a pedal crank middle shaft, left and right pedals, a motion transmission and linkage mechanism, a motion resistance-damping structure and related other structural systems; the method is characterized in that: by means of the eccentric cam type crank returning structure system or angle varying mechanism, the pedal crank structure may be driven by the pedal crank structure, or the manual swinging arm structure may be driven by the pedal crank structure, or the other relevant structure may be driven in parallel or alternately.

2. The exercise apparatus of claim 1, wherein: the left pedal crank and the right pedal crank are fixedly connected in a parallel way, or the left pedal crank and the right pedal crank are driven in parallel or driven alternately by 180 degrees or in other suitable adjustable connection angle relations by the regulation and control of correspondingly arranged angle changing mechanisms;

the corresponding angle-changing mechanism is arranged between the pedal crank structure and the pedal crank central shaft structure, or between the pedal crank structure and the corresponding crankshaft structure or the eccentric bearing structure or the eccentric cam structure of the pedal crank return structure system, or on other proper structure positions;

a left and a right manual swing arm structures which can be respectively connected with the left and the right pedal crank structures directly or indirectly are arranged;

the corresponding eccentric cam type or other suitable crank return structure systems are arranged, so that the left pedal crank and the right pedal crank which are in a parallel state can be automatically positioned above the central shaft of the pedal crank, and the left pedal crank, the right pedal crank and the left and right circular motion pedals or the left and right elliptical motion pedals or other corresponding structures which are connected with the left and right pedal cranks are in the most suitable waiting motion state; meanwhile, through the addition and subtraction of the spring or gravity return force, the left and right circular motion pedals or the left and right elliptical motion pedals or other corresponding structures which are in parallel relation can be ensured to better complete the 360-degree full-circle driving process, and the stress process of the whole motion is more balanced.

3. The exercise apparatus of claim 1, wherein: an eccentric cam type crank return structure system can be arranged, and a horse riding machine or a body building vehicle or an elliptical machine or a rowing machine or a bicycle or other suitable sports equipment containing the eccentric cam type crank return structure system or multifunctional sports equipment formed by mutual integration of the two can be formed;

the corresponding eccentric cam type crank return structure system is an elastic eccentric cam type crank return structure system with return force provided by a spring, or a gravity eccentric cam type crank return structure system with return force provided by gravity, or a cam type crank return structure system with the combination of the elastic force and the gravity;

the left pedal crank structure (1) and the right pedal crank structure (2) are respectively provided with an independent eccentric cam type crank return structure system or are provided with the same set of eccentric cam type crank return structure system;

on the respective exercise machine, an eccentric cam crank return structure system may be used independently, or in combination with a respective inertial energy storage structure, or in combination with a cable or crankshaft or eccentric bearing or other suitable form of crank return structure system.

4. An exercise apparatus according to claim 1, 2 or 3, wherein: left and right eccentric cam structures (19), (20) which are connected and linked with the left and right crank structures (1), (2) are respectively arranged on proper positions of corresponding sports equipment, the peripheral action profiles of the left and right eccentric cam structures are in an asymmetric eccentric arrangement form relative to the axle center of the left and right crank middle axle structures (3), under the direct or indirect action of spring force or gravity or other proper force, the corresponding left and right top wheel structures (21) and (22) are respectively and directly pushed on the eccentric peripheral profiles of the left and right eccentric cam structures (19) and (20), so that the left and right eccentric cams (19, 20) and the left and right crank structures (1, 2) connected and linked with the left and right eccentric cams can be positioned at the required proper angle positions to be moved, thereby realizing the required processes of pedal crank return and pedal crank full-circle motion acting force equalization;

the left and right top wheel structures (21) and (22) are directly under the action of elasticity or gravity or other suitable force, or indirectly under the action of elasticity or gravity or other suitable force through the corresponding top pushing swing rod structures (24) or inhaul cable structures or other suitable structures.

5. An exercise apparatus according to claim 1, 2 or 3, wherein: an eccentric cam structure (19) connected and linked with the left or right crank structure (1) or (2) is arranged on the corresponding sports apparatus, the peripheral action profile of the eccentric cam structure (19) is in an asymmetric eccentric arrangement form relative to the axis of the left or right crank central shaft structure (3), and a corresponding top wheel structure (21) under the direct or indirect action of spring force or gravity or other appropriate force directly or indirectly pushes the eccentric peripheral profile of the eccentric cam structure (19), so that the eccentric cam structure (19) and the connected and linked left or right crank structure (1) or (2) can be positioned on a required appropriate waiting angle position, and the automatic return of the pedal crank and the process of balancing the acting force of the full-circle motion of the pedal crank are realized;

the top wheel structure (21) is directly under the direct action of elasticity or gravity or other suitable force, or indirectly under the action of the elasticity or gravity or other suitable force through a corresponding top pushing swing rod structure (24) or a pull rope structure or other suitable structure.

6. An exercise apparatus according to claim 1, 2 or 3, wherein: more specific connection and matching relations among the left pedal crank structure (1), the right pedal crank structure (2), the pedal middle shaft structure (3), the eccentric cam structure (19) and the pedal driving wheel structure (70) can be as follows: the pedal driving wheel structure (70) is fixedly connected onto one end of the pedal central shaft structure (3) or the pedal driving wheel structure (70) and one end of the pedal central shaft structure (3) are manufactured in a unified manner, a corresponding angle adjusting shaft path structure (71) is arranged on the outer side of one end, a left pedal crank structure (1) or a right pedal crank structure (2) is arranged on the angle adjusting shaft path structure (71), and the locking connection angle between the left pedal crank structure (1) or the right pedal crank structure (2) and the pedal central shaft structure (3) can be changed by 180 degrees by arranging a lock hole structure (72) which is mutually symmetrical and has an angular position relation of 180 degrees, a lock hole structure which can be arranged on the left pedal crank structure (1) or the right pedal crank structure (2) and a corresponding lock pin structure (73) on the pedal driving wheel structure (70); the left or right pedal crank structure (1) or (2) at the side can be conveniently adjusted in angle relative to the pedal central shaft structure (3) and the pedal crank structure and the eccentric cam structure (19) which can be fixedly arranged at the other side of the pedal central shaft structure;

the eccentric cam structure (19) can be directly and independently arranged on the other side of the pedal central shaft structure (3) or fixedly connected with the crank structure on the same side through a pin-shaped square hole and the like, the eccentric cam structure (19) can also be independently arranged on a corresponding eccentric cam angle adjusting shaft path structure (74) on the other side of the pedal central shaft structure (3), meanwhile, a plurality of lock hole structures (75) which can be arranged on the eccentric cam structure (19) and have an angular position relation of 90 degrees or 180 degrees or other suitable angles, the angle matching relation between the eccentric cam structure (19) and the pedal crank structure can be adjusted through the lock hole structure (75), the corresponding lock hole structure which can be arranged on the left or right pedal crank structure (1) or (2), the corresponding lock pin structure (73) and the like, so that different requirements under different motion modes can be better met.

7. An exercise apparatus according to claim 1, 2 or 3, wherein: the eccentric cam structure (19) is arranged in the middle position of a pedal crank middle shaft structure (3) of the relevant sports apparatus, and the two sides of the eccentric cam structure can be provided with a bearing structure, a shaft seat structure and a corresponding middle shaft seat support/framework structure of the pedal crank middle shaft structure (3), and the structural forms can be fused with the specific structural modes of a bicycle or a body-building vehicle or other relevant sports apparatuses so as to be applied to the corresponding sports apparatus;

when combined with an exercise bike, or a horse riding machine or a bicycle or other suitable exercise equipment, a corresponding push rod structure (76), which is a push rod structure that can be linked with the top wheel structure (21), can be arranged in the frame structure or on other suitable structures.

8. An exercise apparatus according to claim 1, 2 or 3, wherein: the eccentric cam structure (19) is arranged in the middle position of a pedal crank middle shaft structure (3) of the relevant sports apparatus, and the two sides of the eccentric cam structure can be provided with a bearing structure, a shaft seat structure and a corresponding middle shaft seat support/framework structure of the pedal crank middle shaft structure (3), and the structural forms can be fused with the specific structural modes of a bicycle or a body-building vehicle or other relevant sports apparatuses so as to be applied to the corresponding sports apparatus;

when combined with an exercise bike, a horse riding machine, a bicycle or other suitable sports equipment, a corresponding push rod structure (76) capable of being linked with the top wheel structure (21), namely the top wheel push rod structure, can be arranged in the frame structure or on other suitable structures, and the specific arrangement mode can be as follows:

first, the top wheel push rod structure (76) can be located in the bicycle frame riser structure (77) or the frame front down tube structure, etc., where the typical bicycle saddle riser structure (101) is located. The relative directional movement of the top wheel push rod structure (78) can be ensured by the mutual matching of the top wheel push rod structure (78) and a vertical tube structure (77) of a frame or a front lower tube structure of the frame in the cross section shape or the relative structure, and meanwhile, the contact surface between the top wheel structure (21) and the eccentric cam structure (19) in a convex-concave matching mode or other suitable mutually matched appearance forms and structural forms and the like can also play a good role in controlling the directional movement of the top wheel push rod structure (76);

secondly, the upper end edge of a top wheel push rod structure (76) which is arranged in the corresponding vertical tube structure (77) of the frame and provided with a top wheel structure (21) at the lower end is extended out of the top of the vertical tube structure (77) of the frame, and the length of the top wheel push rod structure is kept to be proper, and meanwhile, a bicycle saddle vertical tube structure (101) can be inserted in the upper end of the top wheel push rod structure (76) through the corresponding structural arrangement;

the upper end of the vertical tube structure (77) of the bicycle frame and the upper end of the push rod structure (76) of the top wheel are respectively provided with a quick-release quick-lock structure (78) of the vertical tube of the bicycle frame and a quick-release quick-lock structure (79) of the push rod structure (76) of the top wheel, and the vertical tube structure (101) of the bicycle saddle, which can be inserted into the push rod structure (76) of the top wheel, can be locked on a position with a required height and the like through the quick-release quick-lock structure (79); the push rod structure (76) of the top wheel in the vertical tube structure (77) of the frame can be locked on the position with required height and the like through the vertical tube quick-release quick-lock structure (78), and when the vertical tube quick-release quick-lock structure (78) of the frame is in an open state, the push rod structure (76) of the top wheel can do corresponding reciprocating motion under the effects of the push rod structure (21), the eccentric cam structure (19), the weight of a human body and the like.

9. An exercise apparatus according to claim 1, 2 or 3, wherein: the eccentric cam type crank return structure system in a symmetrical layout mode and the matching condition of the eccentric cam type crank return structure system and related sports equipment are as follows:

the eccentric cam structure (19) can generally adopt a symmetrical layout form of an angular position relationship of 180 degrees between the lowest point of the outer edge, namely the closest point to the axis and the farthest point of the outer edge, so that the energy storage and release working processes of the eccentric cam structure can respectively completely correspond to the working process of convenient treading driving of a pedal crank and the like which moves from the highest point to the lowest point by 'front 180 degrees' and the working process of inconvenient driving or even incapability of treading driving of 'back 180 degrees' which returns from the lowest point to the highest point by 'back 180 degrees';

by adopting the eccentric cam structure (19) in the symmetrical form and the corresponding eccentric cam type crank return structure system, the whole sports equipment product can better and conveniently adapt to various different requirements of various different sports modes such as a high-low saddle exercise bicycle sports mode, an elliptical machine sports mode, a rowing machine sports mode or a riding machine sports mode and the like simultaneously by adjusting the relative angle matching relationship between the pedal crank and the eccentric cam structure (19) and the like;

when the motion mode of the rowing machine or the low-seat exercise bicycle mainly powered by treading forwards and backwards and the motion mode of the elliptical machine or the high-seat exercise bicycle mainly powered by treading upwards and downwards are mutually converted, the corresponding eccentric cam type crank return structure system can always provide high-efficiency return force by adjusting the relative fixed matching angle between the eccentric cam structure (19) and the corresponding pedal crank structure by 90 degrees, and the processes of motion stress and the like are always balanced.

10. An exercise apparatus according to claim 1, 2 or 3, wherein: the eccentric cam type crank return structure system with the asymmetrical layout form and the matching condition between the eccentric cam type crank return structure system and the related sports equipment are as follows:

in order to enable the eccentric cam type crank return structure system to better adapt to the motion mode of an elliptical machine and the motion mode of a body-building vehicle at the same time and better adapt to the requirements of the motion modes of a high saddle, a low saddle and even a horizontal saddle at the same time, an asymmetric layout mode of 90-degree or 270-degree or other suitable angle position relationship can be adopted between the lowest point of the outer edge, the closest point A from the axis, and the highest point of the outer edge, and the farthest point B from the axis of the eccentric cam structure (19) of the corresponding eccentric cam type crank return structure system;

the more specific structural conditions and the corresponding working processes of the eccentric top wheel type crank return structure system in the asymmetric layout form with the angular position relation of 90 degrees or 270 degrees are as follows:

when the pedal structure (90) of the exercise bicycle or the elliptical machine is positioned at the highest working position, the top wheel structure (21) just pushes the lowest point A1 of the outer edge of the eccentric cam structure (19); when the pedal structure (90) of the exercise bicycle or the elliptical machine is positioned at the most front working position, the top wheel structure (21) just pushes the highest point B2 of the outer edge of the eccentric cam structure (19); therefore, no matter the exercise is elliptical, the exercise bicycle is exercise, no matter the exercise bicycle is high-position saddle, or low-position saddle or even horizontal saddle, in the process that the pedal structure 90 capable of pedaling and exerting force and the like can move from the highest end to the foremost end by feet, the corresponding left crank structure, right crank structure (1) and eccentric cam structure (2) and eccentric cam structure (19) sweep the working angle of 90 degrees, the top wheel structure (21) is respectively contacted, acted and pushed with the lowest point of the outer edge of the eccentric cam structure (19), the outer edge points of the middle transition section of 90 degrees and the highest point of the outer edge of the eccentric cam structure (19) in sequence, so that the corresponding processes of increasing the exercise resistance, power consumption and energy storage can be realized;

in the process that the double-foot drive pedal structure (90) and the like return to the highest end from the foremost end to the lowest end through the lowermost end and the rearmost end, and in the process that the corresponding left crank structure (1), the right crank structure (2) and the eccentric cam structure (19) sweep through a working angle of 270 degrees, the top wheel structure (21) is respectively contacted, acted and mutually pushed with the highest point B2 of the outer edge of the eccentric cam structure (19), each point of the outer edge of the middle transition section of 270 degrees and the lowest point A1 of the outer edge of the eccentric cam structure (19) in sequence, so that the corresponding processes of increasing the motion power and assisting the motion energy release can be formed;

in the whole process that the pedal crank and the like sweep through a working angle of 270 degrees, the eccentric cam structure (19) and the like increase the motion power and assist energy release, three structural forms of a contour track, a height reducing track or a slightly height increasing track can be considered in an initial 90-degree working stroke section after the top wheel structure (21) pushes the highest point of the eccentric cam structure (19), even if the outer edge of the eccentric cam structure (19) adopts an extension structural mode which is the same as the height of the highest point or an extension structural mode which reduces the height or an extension structural mode which increases the height by a small amount in the 90-degree range;

when an extension structure mode with equal-height tracks is adopted, corresponding additional resistance and corresponding additional power are not formed in corresponding working stroke of 90 degrees; when an extension structure mode of reducing the height and the height track is adopted, corresponding additional power is formed in a corresponding working stroke of 90 degrees, namely, the self-returning stroke stage is entered;

when the extension structure mode of increasing the height by a small amount is adopted, corresponding smaller additional resistance is formed in the corresponding 90-degree working stroke, and in the motion mode of a low-level seat, particularly a horizontal exercise bicycle, because the low-level seat is already in the non-pedaling stroke stage, the 90-degree stroke is required to be flushed through by the arrangement of the corresponding inertia structure and the action of the inertia force unless the arrangement of the corresponding double-foot lifting structure and the corresponding lifting working stroke are relied on;

after the initial working stroke of 90 degrees, namely the rest 180-degree stroke, a track extending structure mode of sequentially reducing the height is adopted, and the working stroke and the movement process of automatic return of the pedal crank and the like are realized by the reserve force obtained by depending on the initial pedaling working stroke;

according to the working principle of the eccentric top wheel type crank return structure system in the asymmetric layout form with the angular position relation of 90 degrees-270 degrees between the highest point and the lowest point, the eccentric cam type crank return structure system in the asymmetric layout form with other suitable angles between the highest point and the lowest point and the corresponding whole sports equipment product can be designed and manufactured by combining different characteristics of working processes of different sports equipment products and the like.

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