CN2752160Y

CN2752160Y - Exercising device pedal crank

Info

Publication number: CN2752160Y
Application number: CNU2004200965815U
Authority: CN
Inventors: 陈日明
Original assignee: Individual
Current assignee: Individual
Priority date: 2004-09-30
Filing date: 2004-09-30
Publication date: 2006-01-18
Anticipated expiration: 2014-09-30

Abstract

The utility model relates to a pedal crank for sports apparatuses. Each crank is bent into a first segment and a second segment of a definite included angle in a prearranged position. One end is fixedly connected with both ends of a five-way rotating central shaft respectively, and the other end is fixedly connected with a pedal shaft respectively. When the pedal of any crank is at the maximum vertical height, a torque can be formed by pedaling force. The rotating central shaft is rotated so as to reduce the needed pedaling force. The purpose of labor-saving pedaling can be achieved.

Description

Exerciser is ridden crank

Technical field

The utility model relates to foot-operated crank, refers to a kind of foot-operated crank of the exerciser of riding required pedal force when maximum vertical height that alleviates especially.

Background technology

Referring to shown in Figure 1, general step exerciser mostly has two crank pedals, this pedal 1 axle respectively is fixed in left and right side crank 2 one ends, each crank 2 other end is consolidated in an end of a five-way rotary middle spindle 3 respectively, one sprocket wheel 4 and a crank 2 are incorporated on the same end of rotary middle spindle 3, when trampling when forcing in two pedals 1, left and right side two cranks 2 all drive sprocket wheel 4 rotations, reach the purpose that drives wheel body (not shown) Rotating with Uniform.

Referring to Fig. 2, shown in 3, because traditional crank 2 all adopts straight structure, therefore, when pedal 1 rotates to maximum vertical height (going up initial point), the power F that this foot imposes on pedal 1 is passed to the other end along crank 2, by rotary middle point " 0 ", owing to the arm of force between this directed force F and centre of gration equals zero, therefore, when each crank 2 is trampled to vertex, must impose on great pedal force, and cooperate foot on pedal 1, to trample the control of direction, produce horizontal component of force, can reduce resistance a little, step crank 2 rotations, thus the structure design of traditional crank 2, when pedal 1 is at the highest notch, really has the difficulty of trampling, and the shortcoming of effort, even have and cause the danger of trampling injury, so in addition improved necessity is arranged.

Summary of the invention

Main purpose of the present utility model is to provide a kind of crank is bent first section and second section that forms an angle at default position, and an end is consolidated in the two ends of five-way rotary middle spindle respectively, and the other end is the foot-operated crank of exerciser of a fixed pedal shaft respectively.

A kind of exerciser is ridden crank, comprises two cranks, and each crank one end is consolidated in five-way rotary middle spindle two ends respectively, and the other end is consolidated in a pedal shaft respectively; It is characterized in that:

Each crank has first section that extends from the end that is consolidated in the five-way rotary middle spindle respectively, and is bent into and first section second section of being suitable angle extension from first section other end.Wherein:

First section of described crank can be nine elevenths to, 179 degree with the second intersegmental angle.

First section and second section of described crank is formed in one.

First section of described crank is the individual member of dismounting mutually with second section.

First section of described crank with second section mutual affixed corresponding end in, first section central authorities is provided with the polygonal bolt piece of tool through hole, and second section central authorities are provided with the polygonal corresponding slotted eye of tool through hole, after the intercalation, are one by fastener locking each other.

First section free end of described two cranks connects as one with mandrel two ends respectively, and this mandrel is articulated in five-way and concentric with its centre of gration, becomes rotary middle spindle.

First section inboard predetermined position one of one of described crank is convexly equipped with one in order to be intercalated in the registration mast of the set knock hole of sprocket wheel.

Advantage of the present utility model is: because crank of the present utility model, when pedal was positioned at maximum vertical height, foot-operated power produced moment on crank, therefore, but this moment of mat is auxiliary, make trample more easily laborsaving, simultaneously, issuable injury in the time of also can preventing to trample motion.

Description of drawings

Fig. 1, be the partial schematic sectional view of known crank.

Fig. 2, be the schematic perspective view of known crank.

Fig. 3, the strained condition scheme drawing when being positioned at maximum vertical height for known crank pedal.

Fig. 4, be schematic perspective view of the present utility model.

Fig. 5, be schematic side view of the present utility model.

Fig. 6, be the schematic side view of the utility model installing condition.

Fig. 7, the scheme drawing of strained condition when being positioned at maximum heavy straight height for the utility model pedal.

Fig. 8, be the perspective exploded view of another embodiment of the utility model.

Fig. 9, be the schematic side view of another embodiment assembled state of the utility model.

Figure 10, be the schematic perspective view of the another embodiment of the utility model.

The specific embodiment

For to structure of the present utility model, technical characterictic and effect thereof, can have and further understand and be familiar with, lift the number preferred embodiment now, and conjunction with figs. is described in detail as follows:

Shown in Fig. 4-6, the utility model one preferred embodiment, a kind of foot-operated crank of exerciser that is applied to Regular Bicycle, each foot-operated crank 10 1 end is consolidated in two ends of five-way rotary middle spindle 20 respectively, and the other end is consolidated in the axle of pedal 30 respectively; Wherein:

Each crank 10 has first section 11 that extends from the end that is consolidated in five-way rotary middle spindle 20, and from first section 11 other end be bent into and first section 11 be second section 12 that suitable angle extends, the angle that present embodiment is first section 11 and second sections 12 is approximately 120 degree, and second section 12 the other end is provided with the screw of 30 on fixed pedal.

Referring to Fig. 6, shown in 7, during use, when pedal 30 is positioned at maximum vertical height, foot imposes on the application force P vertically downward of pedal 30, angle by the formed straight line of centre of gration " 0 " and second section 12 is φ, at this moment, pedal force P will be decomposed into one and be parallel to second section 12 horizontal component of force P1, and perpendicular to second section 12 vertical component P2, by mechanical analysis as can be known, this horizontal component of force P1=P * COS φ, simultaneously, this vertical component P2 can produce a driving to pedal, the moment that continuation is stepped on forward, and the size of this moment is vertical component P2x arm of force d, be that pedal 30 is when being positioned at vertex, the person of riding imposes on the downward power of pedal, the moment of crank 10 that still can rotate, and then crank 10 is rotated by predetermined direction.

Referring to Fig. 8, shown in 9, the structure of another embodiment of the utility model and a last embodiment are basic identical, difference is: first section 11 and second sections 12 are mutual fixed individual member, in the affixed each other corresponding end, first section 11 central authorities is provided with the polygonal bolt piece 112 of tool through hole 111, and second section 12 central authorities are provided with the polygonal corresponding slotted eye 122 of tool through hole 121, be nested in first section 11 bolt piece 112 when second section 12 polygonal slotted eye 122 correspondences after, locked by a fastener 13, make first section 11 and second sections 12 to be combined into one mutually, simultaneously, by 122 different sleeve positions of bolt piece 112 and slotted eye, can make angle quick adjusting (shown in Fig. 9 dotted line) between nine elevenths to, 179 degree of first section 11 and second sections 12.

Referring to shown in Figure 10, structure and the foregoing description of the another embodiment of the utility model are basic identical, difference is: the free end that left and right two cranks are 10 first section 11 connects as one with a mandrel 14 two ends respectively, forms the integral type member, and, this mandrel 14 can be articulated in five-way, concentric with its centre of gration, become rotary middle spindle, make integral structure more succinct, be convenient to production and assembly, and for freely selecting the collocation assembling; In addition, prominent registration mast 113 (not shown) in order to be intercalated in the set knock hole of sprocket wheel of establishing of first section 11 medial surface appropriate location one of one of two cranks 10.

The above only is preferred embodiment of the present utility model; be not to limit practical range of the present utility model with this; such as those who are familiar with this art; use principle of the present utility model and technical characterictic; various changes and the decoration done all should be covered by within the category that these claims protect.

Claims

1, the foot-operated crank of a kind of exerciser comprises two cranks, and each crank one end is consolidated in five-way rotary middle spindle two ends respectively, and the other end is consolidated in a pedal shaft respectively; It is characterized in that:

Each crank has first section that extends from the end that is consolidated in the five-way rotary middle spindle respectively, and is bent into and first section second section of being suitable angle extension from first section other end.

2, the foot-operated crank of exerciser according to claim 1 is characterized in that: first section of described crank can be nine elevenths to, 179 degree with the second intersegmental angle.

3, the foot-operated crank of exerciser according to claim 1 is characterized in that: first section and second section of described crank is formed in one.

4, the foot-operated crank of exerciser according to claim 1 is characterized in that: first section of described crank is the individual member of dismounting mutually with second section.

5, the foot-operated crank of exerciser according to claim 1, it is characterized in that: first section of described crank with second section mutual affixed corresponding end in, first section central authorities is provided with the polygonal bolt piece of tool through hole, and second section central authorities are provided with the polygonal corresponding slotted eye of tool through hole, after the intercalation, be one each other by fastener locking.

6, the foot-operated crank of exerciser according to claim 1, it is characterized in that: first section free end of described two cranks connects as one with mandrel two ends respectively, and this mandrel is articulated in five-way and concentric with its centre of gration, becomes rotary middle spindle.

7, the foot-operated crank of exerciser according to claim 6, it is characterized in that: first section inboard predetermined position one of one of described crank is convexly equipped with one in order to be intercalated in the registration mast of the set knock hole of sprocket wheel.