阅读说明：本技术 一种新型随速变刚度打水推进装置 (Novel variable-stiffness water-fetching propulsion device along with speed ) 是由 朱光 于 2018-07-05 设计创作，主要内容包括：本发明公开了一种新型随速变刚度打水推进装置,包括蹼板和纵向龙骨,或包括鳍板和纵向龙骨,位于所述蹼板或鳍板的纵向侧边上的纵向龙骨至少有一根为刚度随速可变的随速变刚度纵向龙骨,所述随速变刚度纵向龙骨包括至少一段的刚性杆和至少一个的刚度随速调节装置,所述刚度随速调节装置包括刚性杆内部中空的锥管和藏于锥管中的容纳物,所述藏于锥管中的容纳物为非牛顿流体,或者为与锥管共纵轴线且可沿锥管的纵轴线纵向移动的法向不等刚度锥杆,在与法向不等刚度锥杆的纵轴线相垂直的法向平面内的两根相互垂直的法向不等刚度锥杆纵轴线的法线方向上,法向不等刚度锥杆的弯曲刚度不相同。(The invention discloses a novel variable-speed rigidity water-fetching propulsion device, which comprises a web plate and a longitudinal keel, or comprises a fin plate and a longitudinal keel, at least one longitudinal keel positioned on the longitudinal side edge of the fin plate or fin plate is a speed-variable rigidity longitudinal keel with the rigidity variable along with the speed, the speed-dependent stiffness longitudinal keel comprises at least one section of rigid rod and at least one speed-dependent stiffness adjusting device, the rigidity speed-dependent adjusting device comprises a hollow taper pipe in the rigid rod and a content hidden in the taper pipe, wherein the content hidden in the taper pipe is a non-Newtonian fluid, or a normal unequal stiffness taper rod which is coaxial with the longitudinal axis of the taper pipe and can move longitudinally along the longitudinal axis of the taper pipe, and in the normal direction of the longitudinal axis of the two mutually perpendicular normal unequal stiffness conical rods in the normal plane perpendicular to the longitudinal axis of the normal unequal stiffness conical rods, the bending stiffness of the normal unequal stiffness conical rods is different.)

1. A novel variable-speed stiffness water-beating propulsion device (1) comprises a fin plate (101) and a longitudinal keel (102) or comprises a fin plate and a longitudinal keel (102), and is characterized in that: at least one longitudinal keel (102) positioned on the longitudinal side of the fin plate (101) or fin plate is a variable-speed-dependent stiffness longitudinal keel with variable stiffness along with speed, the variable-speed-dependent stiffness longitudinal keel comprises at least one section of rigid rod and at least one stiffness-dependent speed adjusting device, the stiffness-dependent speed adjusting device comprises a conical tube with a hollow rigid rod inside and a containing object hidden in the conical tube, the containing object hidden in the conical tube is non-Newtonian fluid, or a normal unequal stiffness conical rod which is coaxial with the conical tube and can move longitudinally along the longitudinal axis of the conical tube, the longitudinal axis of the conical tube is a curve or a straight line, the cross section of an inner cavity of the conical tube perpendicular to the longitudinal axis of the conical tube is non-circular or non-equal-sided, the perimeter of the cross section of each inner cavity of the conical tube is gradually reduced from the front end of the advancing direction of the swimmer to the rear end of the advancing direction of the swimmer, and the cross section of the outer contour of the normal unequal stiffness conical rod perpendicular to the longitudinal axis of The circumferences of the cross sections of the outer contours of the conical rods with the same shape and the normal unequal rigidities are gradually reduced from the front end of the traveling direction of the swimmer to the rear end of the traveling direction of the swimmer, the cross section of the inner cavity of the conical tube at the same section is the same as that of the outer contours of the conical rods with the normal unequal rigidities, and the circumference of the cross section of the inner cavity of the conical tube at the same section is larger than that of the outer contours of the conical rods with the normal unequal rigidities, namely the cross section of the inner cavity of the conical tube at the same section is proportionally amplified to the shape of the cross section of the outer contours of the conical rods with the normal unequal rigidities, and the bending rigidities of the conical rods with the normal unequal rigidities are different in the normal direction of the longitudinal axes of the two conical rods with the normal unequal rigidities, wherein the novel variable-speed water-fetching propulsion device (1) comprises a double, The double-foot double-web is respectively worn on the double feet, the bionic tail fin is also worn on the double feet, the variable tail fin is also included, and the double feet single-web is the dolphin web.

2. A novel speed-dependent variable stiffness water jet propulsion unit (1) according to claim 1, characterized in that: when the content hidden in the taper pipe is a normal unequal stiffness taper rod which has a common longitudinal axis with the taper pipe, namely the stiffness-dependent speed adjusting device comprises the taper pipe and the normal unequal stiffness taper rod which are hollow in the rigid rod, a reset elastic element which resets the normal unequal stiffness taper rod which moves longitudinally is also arranged between the taper pipe and the normal unequal stiffness taper rod, the normal unequal stiffness taper rod comprises a smooth surface taper rod with continuously changed cross section perimeter, a step surface taper rod with discontinuously changed cross section perimeter and a chain type taper rod with gradually reduced chain links, and the step surface taper rod comprises a step surface type taper rod with fixed length and fixed shape and a step surface type taper rod with variable length and telescopic pull rod antenna type taper rod.

3. A novel speed-dependent variable stiffness water jet propulsion unit (1) according to claim 2, characterized in that: and a lubricating medium for reducing the frictional resistance between the taper pipe and the normal unequal-rigidity taper rod is filled between the taper pipe and the normal unequal-rigidity taper rod, and the lubricating medium comprises lubricating oil, lubricating grease and lubricating liquid.

4. A novel speed-dependent variable stiffness water jet propulsion unit (1) according to claim 3, characterized in that: the longitudinal axis of the taper pipe is a continuously-changing smooth curve, the cross section of the inner cavity of the taper pipe, which is vertical to the longitudinal axis of the taper pipe, is an ellipse, the perimeter of the cross section of each inner cavity of the taper pipe is gradually reduced from the front end of the traveling direction of a swimmer to the rear end of the traveling direction of the swimmer, the cross section of the outer contour of the taper rod with the normal unequal rigidity, which is vertical to the longitudinal axis of the taper rod with the normal unequal rigidity, is also an ellipse, the perimeter of the cross section of the outer contour of each taper rod with the normal unequal rigidity is also gradually reduced from the front end of the traveling direction of the swimmer to the rear end of the traveling direction of the swimmer, the cross section of the inner cavity of the taper pipe at the same section is the ellipse of the cross section of the taper rod with the normal unequal rigidity, the perimeter of the cross section of the inner cavity of the, the bending stiffness of the cone rod with the normal unequal stiffness is different in the directions of the long axis and the short axis of the oval cross section of the outer contour of the cone rod with the normal unequal stiffness in a normal plane perpendicular to the longitudinal axis of the cone rod with the normal unequal stiffness, namely in the direction parallel to the normal line of the web plate or the fin plate and in the direction perpendicular to the normal line of the web plate or the fin plate, and the long axis of the oval cross section of the inner cavity of the cone tube perpendicular to the longitudinal axis of the cone tube and the long axis of the oval cross section of the outer contour of the cone rod with the normal unequal stiffness perpendicular to the longitudinal axis of the cone rod with the normal unequal stiffness are simultaneously parallel or simultaneously perpendicular to the web plate or the fin plate.

5. A novel speed-dependent variable stiffness water jet propulsion unit (1) according to claim 3, characterized in that: the longitudinal axis of the taper pipe is a continuously changing smooth curve, the cross section of the inner cavity of the taper pipe perpendicular to the longitudinal axis of the taper pipe is rectangular, the perimeter of the cross section of each inner cavity of the taper pipe is gradually reduced from the front end of the traveling direction of a swimmer to the rear end of the traveling direction of the swimmer, the cross section of the outer contour of the taper rod with the normal unequal rigidity perpendicular to the longitudinal axis of the taper rod with the normal unequal rigidity is also rectangular, the perimeter of the cross section of the outer contour of each taper rod with the normal unequal rigidity is also gradually reduced from the front end of the traveling direction of the swimmer to the rear end of the traveling direction of the swimmer, the cross section rectangular shape of the inner cavity of the taper pipe at the same section is the same as the cross section rectangular shape of the cross section of the taper rod with the normal unequal rigidity, the cross section rectangular perimeter of the cross section of the outer contour of the taper rod with the normal unequal, the bending stiffness of the cone rod with the normal unequal stiffness is different in the long side and short side directions of the cross section rectangle of the outer contour of the cone rod with the normal unequal stiffness in the normal plane vertical to the longitudinal axis of the cone rod with the normal unequal stiffness, namely in the normal direction parallel to the web plate or the fin plate and in the normal direction vertical to the web plate or the fin plate, the long side of the cross section rectangle of the inner cavity of the cone tube vertical to the longitudinal axis of the cone tube and the long side of the cross section rectangle of the outer contour of the cone rod with the normal unequal stiffness vertical to the longitudinal axis of the cone rod with the normal unequal stiffness are simultaneously parallel to or simultaneously perpendicular to the web plate or the fin plate, and the novel variable stiffness-following water beating propulsion device (1) comprises a double-foot single fin with one penetrating through one double foot and a double-foot double-web with one foot, also comprises a double-foot double-bionic tail fin with one penetrating through one foot, and further comprises a variable tail fin and a double-foot single fin namely.

6. A new variable speed stiffness water jet propulsion unit (1) according to claim 5, characterized in that: the longitudinal axis of the taper pipe is a continuously changing smooth curve, the cross section of the inner cavity of the taper pipe perpendicular to the longitudinal axis of the taper pipe is rectangular, the perimeter of the cross section of each inner cavity of the taper pipe is gradually reduced from the front end of the traveling direction of a swimmer to the rear end of the traveling direction of the swimmer, the cross section of the outer contour of the taper rod with the normal unequal rigidity perpendicular to the longitudinal axis of the taper rod with the normal unequal rigidity is also rectangular, the perimeter of the cross section of the outer contour of each taper rod with the normal unequal rigidity is also gradually reduced from the front end of the traveling direction of the swimmer to the rear end of the traveling direction of the swimmer, the cross section rectangular shape of the inner cavity of the taper pipe at the same section is the same as the cross section rectangular shape of the cross section of the taper rod with the normal unequal rigidity, the cross section rectangular perimeter of the cross section of the outer contour of the taper rod with the normal unequal, the bending rigidity of the conical rod with the normal unequal rigidity is different in the long side direction and the short side direction of the rectangular cross section of the outer contour of the conical rod with the normal unequal rigidity in a normal plane vertical to the longitudinal axis of the conical rod with the normal unequal rigidity, namely in the direction parallel to the normal line of a fin plate or a fin plate and in the direction vertical to the normal line of the fin plate or the fin plate, the corresponding conical rod with the normal unequal rigidity is a chain type conical rod with gradually reduced chain links, namely the chain links of a chain are gradually reduced from one end in front of the advancing direction of a swimmer to one end behind the advancing direction of the swimmer, hinge shafts among the chain links are perpendicular to the fin plate or the fin plate, the bending rigidity of the conical rod with the normal unequal rigidity correspondingly in the direction parallel to the fin plate or the fin plate is far smaller than the bending rigidity of the conical rod with the normal unequal rigidity in the direction perpendicular to the fin plate or the fin plate, and the novel water pumping propulsion device (1) with the speed varying rigidity comprises, The double-foot double-web is respectively worn on the double feet, the bionic tail fin is also worn on the double feet, the variable tail fin is also included, and the double feet single-web is the dolphin web.

Technical Field

The invention relates to the industries of swimming equipment and diving equipment, in particular to a novel variable-speed rigidity water fetching propulsion device which is used for swimming sports and diving sports.

Background

In modern society, swimming and diving sports are increasingly popularized, various swimming equipment and diving equipment are layered endlessly, and most of the swimming equipment and diving equipment use flippers as main propulsion tools for advancing, wherein the common flippers are respectively worn on two feet, the two flippers are worn on the two feet, the bionic tail fin is worn on the two feet, the two flippers are driving forces for advancing by alternate pumping of the two legs of a swimmer, and the two flippers and the bionic tail fin are driving forces for advancing by synchronous pumping of the two legs of the swimmer.

The swimmer can obtain the best propelling force only by beating water at the optimal beating frequency no matter double-fin, double-fin and single-fin or bionic tail fin; when a swimmer wishes to change the speed of swimming, such as by pumping water at a higher frequency for fast swimming or at a lower frequency for slow swimming, the efficiency of propulsion decreases, especially when the swimmer pumps water at a higher frequency, which is not only inefficient but also quickly fatiguing.

Disclosure of Invention

Aiming at the defects that the main propelling tools of the prior swimming equipment and diving equipment, namely double-foot double-web, double-foot single-web and bionic tail fin, do not well solve the problem of higher propelling efficiency in two states of high-speed quick swimming and low-speed slow swimming, the inventor provides a novel variable-speed-following rigidity water-beating propelling device by combining the characteristics of a human motion structure and scientifically and reasonably applying ergonomics, and by means of the novel variable-speed-following rigidity water-beating propelling device, a swimmer can beat water at a higher frequency for high-speed quick swimming and can beat water at a lower frequency for low-speed slow swimming, the rigidity of a longitudinal keel of the novel variable-speed-following rigidity water-beating propelling device is changed along with the change of the swimming speed or the change of the leg swinging frequency or the leg swinging speed of the swimmer, and the swimmer can effectively improve the specific gravity of useful work no matter what frequency water beating, the advancing efficiency and the swimming speed of swimming and diving are improved to the maximum extent, the physical strength is saved, the advancing potential of a swimmer in water is fully exerted, and the purpose of long-time, long-distance and continuous high-speed tour is finally achieved; the swimmer can effectively reduce the fatigue feeling generated when the swimmer continuously tours for a long distance and a long time through variable-speed tour.

The invention specifically adopts the following scheme:

the utility model provides a novel along with speed change rigidity propulsion unit of fetching water, includes web board and longitudinal keel, or includes fin and longitudinal keel, its characterized in that: the longitudinal keels on the longitudinal sides of the web plate or the fin plate are at least one variable-speed-dependent stiffness longitudinal keel with variable stiffness along with speed, each variable-speed-dependent stiffness longitudinal keel comprises at least one section of rigid rod and at least one variable-speed-dependent stiffness device, each variable-speed-dependent stiffness longitudinal keel comprises a hollow conical tube inside the rigid rod and a content hidden in the conical tube, the content hidden in the conical tube is non-Newtonian fluid or a normal unequal stiffness conical rod which is coaxial with the conical tube and can longitudinally move along the longitudinal axis of the conical tube, the longitudinal axis of the conical tube is a curve or a straight line, the cross section of the inner cavity of the conical tube perpendicular to the longitudinal axis of the conical tube is non-circular or non-equal-sided, the perimeter of the cross section of the inner cavity of each conical tube is gradually reduced from the front end in the swimmer advancing direction to the rear end in the swimmer advancing direction, and the cross section of the outer contour of the normal unequal stiffness conical rod perpendicular to the longitudinal axis of the normal unequal-sided conical rod is also The perimeter of the cross section of the outer contour of the taper rod with unequal rigidity gradually decreases from the front end of the advancing direction of the swimmer to the rear end of the advancing direction of the swimmer, the cross section of the inner cavity of the taper pipe at the same section is the same as the cross section of the outer contour of the taper rod with unequal normal rigidity, and the perimeter of the cross section of the inner cavity of the taper pipe at the same section is larger than the perimeter of the cross section of the outer contour of the taper rod with unequal normal rigidity, namely the cross section of the inner cavity of the taper pipe at the same section is the proportional amplification of the cross section of the outer contour of the taper rod with unequal normal rigidity, the bending rigidity of the taper rods with unequal normal rigidity is different in the normal direction of the longitudinal axes of two taper rods with unequal normal rigidity which are vertical to the longitudinal axis of the taper rod with unequal normal rigidity, the novel variable-speed rigidity water-fetching propulsion device comprises a single double-foot web with one passing through the two, also comprises a bionic tail fin with two feet penetrating through one, and a variable tail fin, wherein the two feet are provided with single web, namely dolphin web.

The longitudinal keels of the double-foot single fin are usually two left and right longitudinal keels which are respectively positioned on two longitudinal side edges of the left and right sides of the fin plate of the double-foot single fin, and the two longitudinal keels are usually the longitudinal keels with the rigidity changing along with the speed; the two longitudinal keels of the bionic tail fin are usually arranged on the left side and the right side of the fin plate of the bionic tail fin, and are also usually arranged on the two longitudinal sides of the fin plate of the bionic tail fin. The longitudinal keels of each fin of the two-footed double-fin are usually also the two left and right longitudinal keels, respectively located on the two longitudinal sides of the left and right sides of each fin of the two-footed double-fin, and usually, the two longitudinal keels are also the longitudinal keels with the stiffness changing along with the speed. The longitudinal side edges are the outer edges of the longitudinal profile.

When the rigidity speed-dependent adjusting device consists of the taper pipe and the non-Newtonian fluid, the non-Newtonian fluid enables the bending rigidity of the longitudinal keel to be increased along with the speed-dependent rigidity change along with the increase of the leg swinging frequency or the leg swinging speed of a swimmer; as the swing frequency or swing rate decreases, the non-newtonian fluid causes the bending stiffness of the longitudinal spine to decrease with the rate of change of stiffness.

When the content hidden in the taper pipe is a normal unequal stiffness taper rod which has a common longitudinal axis with the taper pipe, namely the stiffness-speed-following adjusting device consists of the taper pipe which is hollow in the rigid rod and the normal unequal stiffness taper rod, a reset elastic element which resets the normal unequal stiffness taper rod which moves longitudinally is also arranged between the taper pipe and the normal unequal stiffness taper rod, the normal unequal stiffness taper rod comprises a smooth surface taper rod with continuously changed cross section perimeter, a step surface taper rod with discontinuously changed cross section perimeter and a chain type taper rod with gradually reduced chain links, and the step surface taper rod comprises a step surface type taper rod with fixed length and fixed shape and a pull rod type taper antenna rod with variable length and telescopic.

The rigid rod of the longitudinal keel with the variable stiffness along with the speed is usually a whole hollow taper pipe, the perimeter of the cross section contour of the front end of the swimmer in the advancing direction to the rear end of the swimmer in the advancing direction and the perimeter of the cross section contour of the inner cavity are gradually reduced, and the perimeter of the cross section contour of the taper rod with the unequal stiffness in the normal direction is correspondingly gradually reduced from the front end of the swimmer in the advancing direction to the rear end of the swimmer in the advancing direction. For smooth surface type taper rod, step surface type taper rod or chain type taper rod, the tension type reset elastic element arranged in the taper pipe acts on the big end of the taper pipe, or the pressure type reset elastic element arranged in the taper pipe acts on the small end of the taper pipe, so that the taper pipe is forced to reset towards the advancing direction of the swimmer, the big end of the smooth surface type taper rod, step surface type taper rod or chain type taper rod faces towards the front end of the advancing direction of the swimmer, and the small end of the taper pipe is the rear end; for the pull rod antenna type taper rod, a tension type reset elastic element arranged in the taper pipe penetrates through all hollow telescopic joints of the pull rod antenna type taper rod to act on the front end, facing the advancing direction of a swimmer, of the last rod with the smallest cross section perimeter among all telescopic joints of the pull rod antenna type taper rod, or a pressure type reset elastic element arranged in the taper pipe acts on the rear end, facing the advancing direction of the swimmer, of the last rod with the smallest cross section perimeter among all telescopic joints of the pull rod antenna type taper rod, wherein the last rod is the last rod which faces the rear end in the advancing direction of the swimmer in the fully extended state of all telescopic joints of the pull rod antenna type taper rod, in general, the reset elastic element adopts a tension type reset elastic element, such as a tension spring or a rubber band, one end of the reset elastic element is fixed on the inner wall, facing the advancing direction of the front end, of the hollow taper pipe with the larger cross section perimeter, the other end of the telescopic rod passes through each hollow telescopic joint of the pull rod antenna type conical rod and is fixed with the front end of the last rod with the smallest cross section perimeter in each telescopic joint of the pull rod antenna type conical rod. The tension type reset elastic element or the compression type reset elastic element in the section is arranged in the cavity in the taper pipe, the longitudinal axis of the tension type reset elastic element is coaxial with the taper pipe, two ends of the tension type reset elastic element are respectively fixed with the large head end of the normal unequal-stiffness taper rod and the large head end of the cavity in the taper pipe, and two ends of the compression type reset elastic element are respectively contacted with the small head end of the normal unequal-stiffness taper rod and the small head end of the cavity in the taper pipe.

When the rigidity speed-dependent adjusting device consists of a taper pipe and a smooth surface type taper rod, or consists of a taper pipe and a step surface type taper rod, or consists of a taper pipe and a chain type taper rod, the centrifugal force or the inertia force is increased along with the increase of the leg swinging frequency or the leg swinging speed of a swimmer, the smooth surface type taper rod, the step surface type taper rod or the chain type taper rod overcomes the elasticity of a reset elastic element to move backwards along the longitudinal axis of the taper pipe, and the bending rigidity of the longitudinal keel is increased along with the speed change rigidity; when the leg swinging frequency or the leg swinging speed of a swimmer is reduced, along with the reduction of centrifugal force or inertial force, the smooth surface type conical rod, the stepped surface type conical rod or the chain type conical rod moves forwards along the longitudinal axis of the conical pipe under the elastic action of the reset elastic element, and the bending rigidity of the longitudinal keel is reduced along with the speed change of the rigidity; when the rigidity adjusting device along with speed consists of a taper pipe and a pull rod antenna type taper rod, the centrifugal force or the inertia force is increased along with the increase of the leg swinging frequency or the leg swinging speed of a swimmer, the pull rod antenna type taper rod overcomes the elasticity of a reset elastic element and extends backwards step by step along the longitudinal axis of the taper pipe, the bending rigidity of the longitudinal keel along with the speed change rigidity is increased, the larger the perimeter of the cross section of the rod closer to the outer layer is, the larger the mass is, the larger the centrifugal force or the inertia force is, and the more the pull rod antenna type taper rod extends out first; when the leg swinging frequency or the leg swinging speed of a swimmer is reduced, the pull rod antenna type taper rod is gradually retracted forwards along the longitudinal axis of the taper pipe under the elastic force action of the reset elastic element along with the reduction of the centrifugal force or the inertia force, the bending rigidity of the longitudinal keel is reduced along with the reduction of the speed-variable rigidity, the circumference of the cross section of the rod which is closer to the inner layer is smaller, the mass is smaller, the centrifugal force or the inertia force is smaller, and the pull rod antenna type taper rod is retracted earlier.

The smooth surface tapered rod with the continuously changed cross section perimeter is generally a smooth surface tapered rod with fixed length and fixed shape. The reset elastic element comprises but is not limited to a compression spring, an extension spring, a disc spring, an elastic sheet and a rubber band.

And a lubricating medium for reducing the frictional resistance between the taper pipe and the normal unequal stiffness taper rod is filled between the taper pipe and the normal unequal stiffness taper rod, and the lubricating medium comprises but is not limited to lubricating oil, lubricating grease and lubricating liquid.

The longitudinal axis of the taper pipe is a continuously-changing smooth curve, the cross section of the inner cavity of the taper pipe, which is vertical to the longitudinal axis of the taper pipe, is an ellipse, the perimeter of the cross section of each inner cavity of the taper pipe is gradually reduced from the front end of the traveling direction of a swimmer to the rear end of the traveling direction of the swimmer, the cross section of the outer contour of the taper rod with the normal unequal rigidity, which is vertical to the longitudinal axis of the taper rod with the normal unequal rigidity, is also an ellipse, the perimeter of the cross section of the outer contour of each taper rod with the normal unequal rigidity is also gradually reduced from the front end of the traveling direction of the swimmer to the rear end of the traveling direction of the swimmer, the cross section of the inner cavity of the taper pipe at the same section is the ellipse of the cross section of the taper rod with the normal unequal rigidity, the perimeter of the cross section of the inner cavity of the, the bending rigidity of the cone rod with the normal unequal rigidity is different in the directions of the long axis and the short axis of the oval cross section of the outer contour of the cone rod with the normal unequal rigidity in a normal plane perpendicular to the longitudinal axis of the cone rod with the normal unequal rigidity, namely in the direction parallel to the normal line of the web plate or the fin plate and in the direction perpendicular to the normal line of the web plate or the fin plate, the long axis of the oval cross section of the inner cavity cross section of the cone tube perpendicular to the longitudinal axis of the cone tube and the long axis of the oval cross section of the outer contour of the cone rod with the normal unequal rigidity perpendicular to the longitudinal axis of the cone rod with the normal unequal rigidity are simultaneously parallel or simultaneously perpendicular to the web plate or the fin plate, the novel rigidity-dependent water beating propelling device comprises a double-fin single-fin double-fin single-dolphin.

The normal unequal stiffness taper rod in the previous paragraph enables the directivity of the stiffness along with the speed change characteristic of the longitudinal keel with the speed change stiffness to be stronger along with the change of the leg swinging frequency or the leg swinging speed of a swimmer, and the response of the longitudinal keel with the speed change stiffness, which has the same volume and weight, to be more sensitive and have higher responsiveness, so that the volume and the weight of the whole set of novel variable-stiffness water-beating propulsion device are reduced; meanwhile, the longitudinal axis of the longitudinal keel with the variable stiffness along with the variable speed can be designed into a continuously variable smooth curve, and the taper rod with the normal unequal stiffness in the vertebral canal can freely move longitudinally.

The longitudinal axis of the taper pipe is a continuously changing smooth curve, the cross section of the inner cavity of the taper pipe perpendicular to the longitudinal axis of the taper pipe is rectangular, the perimeter of the cross section of each inner cavity of the taper pipe is gradually reduced from the front end of the traveling direction of a swimmer to the rear end of the traveling direction of the swimmer, the cross section of the outer contour of the taper rod with the normal unequal rigidity perpendicular to the longitudinal axis of the taper rod with the normal unequal rigidity is also rectangular, the perimeter of the cross section of the outer contour of each taper rod with the normal unequal rigidity is also gradually reduced from the front end of the traveling direction of the swimmer to the rear end of the traveling direction of the swimmer, the cross section rectangular shape of the inner cavity of the taper pipe at the same section is the same as the cross section rectangular shape of the cross section of the taper rod with the normal unequal rigidity, the cross section rectangular perimeter of the cross section of the outer contour of the taper rod with the normal unequal, the bending stiffness of the cone rod with the normal unequal stiffness is different in the long side and short side directions of the cross section rectangle of the outer contour of the cone rod with the normal unequal stiffness in the normal plane vertical to the longitudinal axis of the cone rod with the normal unequal stiffness, namely in the normal direction parallel to the web plate or the fin plate and in the normal direction vertical to the web plate or the fin plate, the long side of the cross section rectangle of the inner cavity of the cone tube vertical to the longitudinal axis of the cone tube and the long side of the cross section rectangle of the outer contour of the cone rod with the normal unequal stiffness vertical to the longitudinal axis of the cone rod with the normal unequal stiffness are simultaneously parallel to or simultaneously perpendicular to the web plate or the fin plate, the novel acceleration-dependent variable water beating propelling device comprises a double-foot single fin with one for each of the double feet, a double-foot double-web with each of the double feet, a bionic tail fin with each of the double feet, and a variable tail fin, wherein the double-foot single fin is a dolphin.

The normal unequal stiffness taper rod in the previous paragraph also enables the directivity of the stiffness along with the speed change characteristic of the longitudinal keel with speed change stiffness to be stronger along with the change of the leg swinging frequency or the leg swinging speed of a swimmer, and the response of the longitudinal keel with speed change stiffness, which has the same volume and weight, to be more sensitive and higher, so that the volume and the weight of the whole set of novel variable-stiffness-along water-beating propulsion device are reduced; meanwhile, the longitudinal axis of the longitudinal keel with the variable stiffness along with the variable speed can be designed into a continuously variable smooth curve, and the taper rod with the normal unequal stiffness in the vertebral canal can freely move longitudinally.

The longitudinal axis of the taper pipe is a continuously changing smooth curve, the cross section of the inner cavity of the taper pipe perpendicular to the longitudinal axis of the taper pipe is rectangular, the perimeter of the cross section of each inner cavity of the taper pipe is gradually reduced from the front end of the traveling direction of a swimmer to the rear end of the traveling direction of the swimmer, the cross section of the outer contour of the taper rod with the normal unequal rigidity perpendicular to the longitudinal axis of the taper rod with the normal unequal rigidity is also rectangular, the perimeter of the cross section of the outer contour of each taper rod with the normal unequal rigidity is also gradually reduced from the front end of the traveling direction of the swimmer to the rear end of the traveling direction of the swimmer, the cross section rectangular shape of the inner cavity of the taper pipe at the same section is the same as the cross section rectangular shape of the cross section of the taper rod with the normal unequal rigidity, the cross section rectangular perimeter of the cross section of the outer contour of the taper rod with the normal unequal, the bending rigidity of the conical rod with the normal unequal rigidity is different in the long side direction and the short side direction of the rectangular cross section of the outer contour of the conical rod with the normal unequal rigidity in a normal plane vertical to the longitudinal axis of the conical rod with the normal unequal rigidity, namely in the direction parallel to the normal line of a fin plate or a fin plate and in the direction vertical to the normal line of the fin plate or the fin plate, the corresponding conical rod with the normal unequal rigidity is a chain type conical rod with gradually reduced chain links, namely the chain links of a chain are gradually reduced from one end in front of the advancing direction of a swimmer to one end behind the advancing direction of the swimmer, hinge shafts among the chain links are perpendicular to the fin plate or the fin plate, the bending rigidity of the conical rod with the normal unequal rigidity correspondingly in the direction parallel to the fin plate or the fin plate is far smaller than that of the conical rod with the normal unequal rigidity in the direction perpendicular to the fin plate or the fin plate, and the novel water pumping propulsion device with the speed-variable rigidity comprises a, The double-foot double-web is respectively worn on the double feet, the bionic tail fin is also worn on the double feet, the variable tail fin is also included, and the double feet single-web is the dolphin web.

The chain type taper rod in the last paragraph ensures that the directivity of the rigidity along with the speed change characteristic of the longitudinal keel with the speed change rigidity is strongest along with the change of the leg swinging frequency or the leg swinging speed of a swimmer, and the response of the longitudinal keel with the speed change rigidity is most sensitive and has the highest responsivity with the same volume and weight, thereby reducing the volume and weight of the whole set of novel water beating propulsion device with the speed change rigidity to the maximum extent; meanwhile, the longitudinal axis of the longitudinal keel with the variable stiffness along with the variable speed can be designed into a continuously variable smooth curve, and the taper rod with the normal unequal stiffness in the vertebral canal can completely and freely move longitudinally.

The variable tail fin comprises a main tail fin, a left tail fin and a right tail fin, wherein the left tail fin and the right tail fin are arranged on the left side and the right side of the main tail fin and are respectively hinged with the main tail fin; the swimmer can realize the function of adjusting the fin span width or the fin span area of the variable tail fin in the process of swinging the variable tail fin by synchronously rotating the ankle or asynchronously rotating the ankle, namely, the function of accelerating and decelerating or turning. The direction of travel of the swimmer is forward. The left tail fin comprises a left fin plate and a left longitudinal keel positioned on the longitudinal side edge of the left outer side of the left fin plate, the right tail fin comprises a right fin plate and a right longitudinal keel positioned on the longitudinal side edge of the right outer side of the right fin plate, and the left longitudinal keel and the right longitudinal keel are speed-dependent stiffness longitudinal keels under the common condition. The longitudinal side edges are the outer edges of the longitudinal profile.

Or, the variable tail fin comprises a tail fin fixing rod, a left tail fin and a right tail fin which are arranged on the left side and the right side of the tail fin fixing rod and are respectively hinged with the tail fin fixing rod, the left tail fin and the right tail fin are parallel to each other and are parallel to the water surface of the water area where the swimmer is located, the fin widening degree of the left tail fin and the right tail fin is variable or the fin spreading area is variable, the front end of the tail fin fixing rod is fixed between the legs or the feet of the swimmer, 2 variable fin pedals for fixing the left foot and the right foot of the swimmer are respectively arranged on the left side and the right side of the middle area of the tail fin fixing rod, the 2 variable fin pedals are respectively hinged with the tail fin fixing rod through respective hinge shafts, and the 2 variable fin pedals are respectively connected with the left tail fin and the right tail fin through respective linkage elements in a same side; the swimmer can realize the function of adjusting the fin span width or the fin span area of the variable tail fin in the process of swinging the variable tail fin by synchronously rotating the ankle or asynchronously rotating the ankle, namely, the function of accelerating and decelerating or turning. The direction of travel of the swimmer is forward. The left tail fin comprises a left fin plate and a left longitudinal keel positioned on the longitudinal side edge of the left outer side of the left fin plate, the right tail fin comprises a right fin plate and a right longitudinal keel positioned on the longitudinal side edge of the right outer side of the right fin plate, and the left longitudinal keel and the right longitudinal keel are speed-dependent stiffness longitudinal keels under the common condition. The longitudinal side edges are the outer edges of the longitudinal profile.

The fin expanse is similar to the span width of birds and the fin area is similar to the span area of birds.

In the invention, the rigid rod is made of materials including but not limited to engineering plastics, glass fiber reinforced plastics, carbon fibers, thin-wall steel, aluminum alloy, titanium alloy, thin-wall copper alloy, ceramics, toughened glass, bamboo, wood and nylon, and has light weight and high strength so as to meet the requirements of long-time and heavy-load work.

The invention has the advantages that:

1. according to the normal unequal stiffness taper rod, in the normal direction of the longitudinal axes of the two mutually perpendicular normal unequal stiffness taper rods in the normal plane perpendicular to the longitudinal axis of the normal unequal stiffness taper rod, the bending stiffness of the normal unequal stiffness taper rods is different, the directivity of the stiffness of the longitudinal keel along with the speed change characteristic is stronger along with the change of the leg swinging frequency or the leg swinging speed of a swimmer, the response of the longitudinal keel along with the speed change characteristic with the same volume and weight is more sensitive and the response is higher, so that the volume and the weight of the whole novel variable-stiffness water beating propulsion device are reduced; meanwhile, the longitudinal axis of the longitudinal keel with the variable stiffness along with the variable speed can be designed into a continuously variable smooth curve, and the taper rod with the normal unequal stiffness in the vertebral canal can freely move longitudinally.

2. According to the chain type taper rod in the normal unequal stiffness taper rod, articulated shafts among chain links of the chain are perpendicular to the web plate or the fin plate, the bending stiffness of the normal unequal stiffness taper rod in the direction parallel to the web plate or the fin plate is far smaller than that of the normal unequal stiffness taper rod in the direction perpendicular to the web plate or the fin plate in the long side and short side directions of the cross section rectangle of the outer contour of the normal unequal stiffness taper rod in a normal plane perpendicular to the longitudinal axis of the normal unequal stiffness taper rod, the directivity of the stiffness with the speed change characteristic of the longitudinal keel is strongest along with the speed change characteristic of a swimmer along with the change of the leg swinging frequency or the leg swinging speed, the response of the longitudinal keel with the speed change rigidity is most sensitive and the response is highest in the same volume and weight, and therefore the volume and the weight of the whole set of novel beating water propulsion device with the speed change rigidity are reduced to the greatest extent; meanwhile, the longitudinal axis of the longitudinal keel with the variable stiffness along with the variable speed can be designed into a continuously variable smooth curve, and the taper rod with the normal unequal stiffness in the vertebral canal can completely and freely move longitudinally.

3. The novel variable-speed variable-rigidity water beating propulsion device has the advantages that a swimmer can beat water at a high speed and quickly swim at a high frequency and also beat water at a low speed and slowly swim at a low frequency, the rigidity of the longitudinal keel of the novel variable-speed variable-rigidity water beating propulsion device changes along with the change of the swimming speed or the change of the leg swinging frequency or the leg swinging speed of the swimmer, the swimmer can effectively improve the proportion of useful work no matter what frequency the swimmer beats water, the advancing efficiency and the swimming speed of swimming and diving are improved to the maximum extent, the physical strength is saved, the advancing potential of the swimmer in water is fully exerted, and the purpose of long-time, long-distance and continuous high-speed tour is finally achieved.

4. According to the novel variable-speed variable-rigidity water fetching propulsion device, a swimmer can effectively reduce fatigue feeling generated during long-distance and long-time continuous tour through variable-speed tour.

5. The invention has the advantages of light structure, reliable work, simple corresponding manufacturing process and low cost, and is convenient for large-scale production and popularization and use.

Drawings

Fig. 1 is a schematic structural diagram of the novel variable-speed stiffness water-fetching propulsion device comprising a web plate or a fin plate and a left longitudinal keel and a right longitudinal keel.

In the figure: 1. a novel variable-speed rigidity water-fetching propulsion device; 101. a web plate; 102. a longitudinal keel.

Wherein the left and right longitudinal keels 102 are both speed-dependent stiffness longitudinal keels.

Detailed Description

The following further describes embodiments of the present invention with reference to the accompanying drawings:

as shown in fig. 1, the novel variable-speed stiffness water-fetching propulsion device 1 mainly comprises a web plate 101 and a left longitudinal keel and a right longitudinal keel 102, wherein the left longitudinal keel and the right longitudinal keel 102 are variable-speed stiffness longitudinal keels.

The specific embodiment of the invention is as follows: