Free pedal swimming booster

Abstract

The free-pedaling swimming boosting device comprises two gyrating bodies and a main shaft arranged between an upper gyrating shell and a lower gyrating shell, two one-way bearings are connected to the main shaft, the outer rings of the two one-way bearings are respectively connected to the corresponding gyrating bodies, and the upper end of the main shaft is rotatably connected to the bearing seat of the upper gyrating shell; the end faces of the two gyrating bodies away from each other are provided with mounting grooves, and a spiral spring is arranged in the mounting groove, one end of the spiral spring is fixed in the mounting groove, and the other end is respectively connected to the bearing seats inside the upper gyrating shell and the lower gyrating shell, a rope groove is arranged in the circumference of the gyrating body, a pull rope is wound around the rope groove, one end of the pull rope is fixed to the bottom of the rope groove, and the other end of the pull rope extends to the outside through a guide mechanism, the lower end of the main shaft passes through the lower gyrating shell and is connected to an acceleration mechanism, and the acceleration mechanism is connected to a propulsion mechanism on the side away from the lower gyrating shell. The free-pedaling swimming boosting device proposed by the present invention enables any single leg or double legs to generate thrust when stepping in any state without affecting or restricting each other.

Description

Technical Field

[0001] The invention relates to the technical field of swimming equipment, in particular to a free-pedaling swimming boosting device. Background Art

[0002] Swimming is a sport that most people like, especially in the hot summer. If you can swim in a swimming pool or a river or sea, you can not only prevent heatstroke and cool down, but also exercise your body. At the same time, you can also feel the fun of swimming.

[0003] For swimming enthusiasts, swimming and playing in the water is both a form of exercise and a lot of fun. It is a sport that most people love, but it is very physically demanding. For most people, they do not have the physical strength to keep up, and staying in the water for a long time may lead to the risk of drowning.

[0004] Swimming requires certain skills, which are not available to most people. Those who cannot swim must use other tools. Nowadays, most people use life-saving tools, which are not only difficult to learn to swim, but also make it difficult to experience the real fun of swimming. At the same time, for people who can swim, in order to increase the swimming speed, they usually use auxiliary tools such as fins or electric propellers, but fins cannot increase the speed, and electric propellers are too expensive to be affordable for most swimmers.

[0005] In response to this, the applicant invented a foot-operated swimming propulsion device with Chinese application number CN202120600232.6. Through this device, artificial power can be used to better exercise the body and improve the swimming experience, increase the swimming speed, and there is no problem of endurance limitation; however, the device has the disadvantage that since the chain is wound around the sprocket, then, in the process of generating thrust, one foot is in a straight state and the other foot must be in a bent state, which restricts the user's legs and feet and cannot maximize the thrust generation. Summary of the invention

[0006] The purpose of the present invention is to propose a free-pedaling swimming propulsion device to solve the problems in the background technology, so that when any single leg or double legs generate thrust in any state, the other leg is not constrained by its state and can maximize the thrust, thereby improving the experience effect.

[0007] To achieve the above purpose, the following technical scheme is adopted: a free-pedaling swimming booster device, comprising an upper gyroscopic shell and a lower gyroscopic shell arranged up and down, a gyroscopic body symmetrically arranged up and down in a cavity formed between the upper gyroscopic shell and the lower gyroscopic shell, a main shaft is arranged in the cavity, two one-way bearings are sequentially connected to the main shaft body up and down, the outer rings of the two one-way bearings are respectively connected to the corresponding gyroscopic bodies, and the upper end of the main shaft is rotatably connected to the bearing seat of the upper gyroscopic shell;

[0008] The end surfaces of the two gyratory bodies that are away from each other are provided with mounting grooves, and a scroll spring is installed in the mounting groove. One end of the scroll spring is fixed on the groove wall of the mounting groove, and the other end of the scroll spring is connected to the upper gyratory housing bearing seat portion and the lower gyratory housing bearing seat portion respectively.

[0009] Rope grooves are provided in the circumference of the two gyratory bodies, and a pull rope is wound around the rope grooves. One end of the pull rope is fixed to the bottom of the rope groove. A guide mechanism is provided in the shell wall of the upper gyratory shell and the lower gyratory shell, and the other end of the pull rope extends to the outside through the guide mechanism.

[0010] The lower end of the main shaft is rotatably connected to the lower rotary shell bearing seat and is connected to an acceleration mechanism through the lower rotary shell bearing seat. The acceleration mechanism is connected to a propulsion mechanism at a side away from the lower rotary shell.

[0011] Preferably, the acceleration mechanism includes a housing bracket and a ring gear, the lower end surface of the housing bracket has an opening, the open end of the ring gear extends to a predetermined distance inside the housing bracket, the main shaft passes through the lower swing housing and the housing bracket in sequence and is connected to a primary planetary carrier, the lower end surface of the primary planetary carrier is evenly connected to a plurality of primary planetary gears along the circumferential direction, the exteriors of the plurality of primary planetary gears are respectively meshed with the ring teeth provided on the ring gear for transmission, the plurality of primary planetary gears are internally meshed with a secondary planetary carrier, the lower end surface of the secondary planetary carrier is evenly connected to a plurality of secondary planetary gears along the circumferential direction, the exteriors of the plurality of secondary planetary gears are respectively meshed with the ring teeth provided on the ring gear for transmission, the plurality of secondary planetary gears are internally meshed with a transmission gear, a transmission shaft is connected to the transmission gear, the upper end of the transmission shaft is rotatably connected to the lower end of the secondary planetary carrier, the lower end of the transmission shaft passes through the ring gear, extends to the outside and is connected to the upper end of the propulsion mechanism.

[0012] Preferably, the propulsion mechanism includes a pressure chamber, a water inlet is provided at the lower end of the pressure chamber, a drain outlet is provided at the side of the pressure chamber, turbine blades are provided in the pressure chamber, and the lower end of the transmission shaft extends into the pressure chamber and is connected to the turbine blades.

[0013] Preferably, a fixing frame is arranged between the inner wall of the pressure chamber and the turbine blades, and the fixing frame includes two fixing rings arranged in parallel, and a grid blade is connected between the two fixing rings, and the projection of the grid blade within the annular surface of the fixing ring has a predetermined angle with the tangent direction of the fixing ring, and a skeleton is arranged on one of the fixing rings, and a bearing seat is provided at the inner center of the skeleton and is rotatably connected to the turbine blades, and the outer ring of the fixing ring outside the skeleton is threadedly connected to the water inlet of the pressure chamber.

[0014] Preferably, the adjacent end faces of the two rotating bodies are provided with a plurality of ball head grooves along the circumferential direction, and the rotating bodies are provided with connecting holes, both ends of the connecting holes are respectively connected to the rope grooves, and the midpoint of the connecting hole coincides with the midpoint of one of the ball head grooves, and one end of the pull rope passes through the connecting hole and the ball head groove in sequence and is knotted into a ball shape at the end of the pull rope and placed in the ball head groove for connection and fixation.

[0015] Preferably, the guide mechanism includes a guide opening arranged between the upper rotating shell and the lower rotating shell, a fixed rope block is arranged in the guide opening, and guide grooves are arranged on the upper and lower end surfaces of the fixed rope block, and the two guide grooves are respectively provided with two guide wheels along the front and rear directions, and the other end of each pull rope passes through a guide hole formed between the two guide wheels arranged on the same guide groove and extends to the outside, one end of the guide wheel is rotatably connected to the fixed rope block through a column pin, and the other end of the guide wheel is rotatably connected to the upper rotating shell and the lower rotating shell respectively through a column pin, and the fixed rope block is fixedly connected to the upper rotating shell and the lower rotating shell respectively through the column pin.

[0016] Preferably, it also includes a guide cone, which is a hollow structure with a bottle body and a bottle cap, and the guide cone is arranged on the opposite side of the drain outlet. The lower swirl shell, the shell bracket and the side wall of the pressure chamber close to the guide cone are all provided with ribs, and the guide cone is provided with a dovetail groove matching the ribs, and a locking tongue is provided at one end of the dovetail groove, and a sealing head is provided at the other end.

[0017] Preferably, it also includes a plurality of connecting components arranged on the circumference of the upper rotating shell, the connecting components are in a locked state when subjected to force in a predetermined direction, and can be rotated to a predetermined angle and disassembled and assembled by plugging when not subjected to external force; the plurality of connecting components are connected and fixed by straps and worn on the swimmer; after being worn and fixed, the free-pedaling swimming propulsion device must be located between the swimmer's waist in front of the abdomen.

[0018] Preferably, the connecting assembly includes a plug-in slot and a plug-in hook, the plug-in slot is circumferentially arranged on the upper rotating shell body, the plug-in slot opening is arranged away from one side of the rotating body, the plug-in slot has a fan-shaped structure, a limiting block is arranged on one side of the slot opening, one end of the plug-in hook extends to the bottom of the plug-in slot, the bottom of the plug-in slot is cylindrical, the mating surface of the plug-in hook is the same cylindrical shape, the plug-in hook can be rotated in the plug-in slot at a predetermined angle, the other end of the plug-in hook is located outside the plug-in slot, a limiting slot is arranged on the plug-in hook, the plug-in hook is in an initial state to be disassembled and assembled by plugging, and when the plug-in hook is rotated to a predetermined angle, the limiting slot cooperates with the limiting block to achieve locking.

[0019] Preferably, a K-shaped block is symmetrically arranged on the plug-in hook outside the plug-in slot, one end of the K-shaped block is in a suspended state, and the K-shaped block has the function of distinguishing whether the plug-in hook is in a locked state or a detachable state when the plug-in hook is subjected to an external force in a predetermined direction.

[0020] Beneficial effects achieved by the present invention:

[0021] Compared with the prior art, the free-pedaling swimming propulsion device of the present invention allows the user to pedal with one or both legs to generate thrust in any state without the other leg being restricted by its state and can generate thrust as required to the maximum extent, thereby improving the swimming experience. Moreover, compared with the prior art, the device can also be well adapted to the situation where the disabled have only one leg, unlike the prior art which requires both legs to work together to generate thrust. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the front cross-section structure of the free-pedaling swimming propulsion device of the present invention.

[0023] Figure 2 It is a schematic diagram of the rear axle side structure of the free-pedaling swimming propulsion device of the present invention.

[0024] Figure 3 It is a schematic diagram of the front axle side structure of the free pedaling swimming propulsion device of the present invention.

[0025] Figure 4 It is a schematic diagram of the structure of the upper rotating shell of the free-pedaling swimming booster device of the present invention.

[0026] Figure 5 It is a schematic diagram of the gyratory structure of the free-pedaling swimming booster device of the present invention.

[0027] Figure 6 It is a schematic diagram of the structure of the other side of the gyroscope of the free-pedaling swimming booster device of the present invention.

[0028] Figure 7 It is a schematic diagram of the housing support structure of the free-pedaling swimming booster device of the present invention.

[0029] Figure 8 It is a schematic diagram of the scroll spring structure of the free-pedaling swimming booster device of the present invention.

[0030] Fig. 9 It is a schematic diagram of the internal structure of the acceleration mechanism of the free-pedaling swimming booster device of the present invention.

[0031] Fig.10 It is a schematic diagram of the structure of the fixing frame of the free-pedaling swimming boosting device of the present invention.

[0032] Fig.11It is a schematic diagram of the turbine blade structure of the free pedaling swimming booster device of the present invention.

[0033] Fig.12 It is a schematic diagram of the structure of the guide mechanism of the free-pedaling swimming booster device of the present invention.

[0034] Fig.13 It is a schematic diagram of the structure of the connection assembly of the free-pedaling swimming booster device of the present invention.

[0035] Fig.14 It is a schematic diagram of the guide cone structure of the free pedaling swimming propulsion device of the present invention.

[0036] Fig.15 It is a schematic diagram of the gear ring structure of the free-pedaling swimming propulsion device of the present invention.

[0037] Fig.16 It is a schematic diagram of the main shaft structure of the free-pedaling swimming propulsion device of the present invention.

[0038] In the figure, 1-upper swivel housing, 2-lower swivel housing, 3-swivel body, 4-main shaft, 5-one-way bearing, 6-mounting groove, 61-bayonet, 7-volute spring, 71-convex ring, 72-convex part, 8-rope groove, 9-pull rope, 10-housing bracket, 11-gear ring, 12-first-stage planet carrier, 13-first-stage planetary gear, 14-second-stage planet carrier, 15-second-stage planetary gear, 16-transmission gear, 17-transmission shaft, 18- Pressure chamber, 19-water inlet, 20-drainage outlet, 21-turbine blade, 22-fixed frame, 221-fixed ring, 222-grid blade, 223-skeleton, 23-ball head groove, 24-connecting hole, 25-fixed rope block, 26-guide groove, 27-guide wheel, 28-guide cone, 29-rib, 30-dovetail groove, 31-plug-in groove, 32-plug-in hook, 33-limit block, 34-limit groove, 35-K-type block. DETAILED DESCRIPTION

[0039] The technical solutions in the embodiments of the present invention are described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0040] In the description of the present invention, it is necessary to understand that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0041] See attached Figure 1-16The free-pedaling swimming propulsion device comprises an upper rotating shell 1 and a lower rotating shell 2 which are arranged up and down, a rotating body 3 is symmetrically arranged in the cavity formed between the upper rotating shell 1 and the lower rotating shell 2, a main shaft 4 is arranged in the cavity, and the shaft body of the main shaft 4 is sequentially connected with two one-way bearings 5 ​​in upper and lower order, that is, the main shaft 4 is connected to the inner ring of the one-way bearing 5 through a key and a keyway, wherein the model of the one-way bearing 5 is "CSK17PP with groove 17*40*12", that is, the one-way bearing 5 has the characteristics that the outer ring can drive the inner ring to rotate forward (assuming forward rotation at this time), the outer ring cannot drive the inner ring to rotate when it is reversed, and the inner ring cannot drive the outer ring to rotate when it is forward, the outer rings of the two one-way bearings 5 ​​are respectively connected to the corresponding rotating bodies 3, and the upper end of the main shaft 4 is rotatably connected to the bearing seat of the upper rotating shell 1 through the bearing;

[0042] The end faces of the two gyratory bodies 3 that are away from each other are provided with mounting grooves 6, and a spiral spring 7 is installed in the mounting grooves 6. One end of the spiral spring 7 is fixed on the groove wall of the mounting groove 6. Specifically, bayonet holes 61 are evenly opened on the circumference of the groove wall of the mounting groove 6. One end of the spiral spring 7 is bent into a U-shaped cross-section and is clamped on any two adjacent bayonet holes 61 for fixation. The other end of the spiral spring 7 is respectively connected to the bearing seat part of the upper gyratory shell 1 and the bearing seat part of the lower gyratory shell 2; specifically, the end faces of the bearing seat part of the upper gyratory shell 1 and the bearing seat part of the lower gyratory shell 2 that are close to each other are cut into a convex ring 71 with a protrusion and a convex portion 72, and the outer circle of the convex ring 71 is cocircular with the outer circle of the convex portion 72, and the inner circle of the convex ring 71 is tangent to the cut. At this time, The other end of the spiral spring 7 is clamped between the convex ring 71 and the convex portion 72, and is connected and fixed by a fixing pin or screw. A rope groove 8 is circumferentially opened on the two gyrating bodies 3, and a pull rope 9 is wound on the rope groove 8. One end of the pull rope 9 is fixed to the bottom of the rope groove 8. Specifically, a plurality of ball head grooves 23 are arranged along the circumferential direction on the end faces of the two gyrating bodies 3. A connecting hole 24 is arranged on the gyrating body 3. The two ends of the connecting hole 24 are respectively connected to the rope groove 8. The midpoint of the connecting hole 24 coincides with the midpoint of one of the ball head grooves 23. One end of the pull rope 9 passes through the connecting hole 24 and the ball head groove 23 in turn and is tied into a ball shape at the end of the pull rope 9 and is placed in the ball head groove 23 for connection and fixation, and the winding directions of the two pull ropes 9 are kept consistent; a shell wall of the upper gyrating shell 1 and the lower gyrating shell 2 is provided There is a guiding mechanism, and the other ends of the two pull ropes 9 extend to the outside through the guiding mechanism and are respectively connected to the user's legs and feet. The connection method is the existing technology and will not be repeated here. The lower end of the main shaft 4 passes through the lower rotating shell 2 and is connected to an acceleration mechanism. The acceleration mechanism is connected to a propulsion mechanism away from the lower rotating shell 2. During specific use, the user steps on the pull rope 9 to put it in an outward tensioned state, and the pull rope 9 drives the rotating body 3 to rotate. Since the center of the rotating body 3 is connected to the outer ring of the one-way bearing 5, the inner ring of the one-way bearing 5 is driven to rotate, and the inner ring of the one-way bearing 5 drives the main shaft 4 to rotate, so that the main shaft 4 drives the acceleration mechanism and the propulsion mechanism to operate and generate thrust; when the stepping process is completed, the pull rope 9 located on the outside is not tightened by external force due to the setting Due to the rebound effect of the spiral spring 7, the spiral spring 7 restores the gyro 3 to its initial state, thereby introducing the pull rope 9 located outside into the inside and winding it in the rope groove 8, preparing for the next pull rope 9 to be pulled. In this process, the gyro 3 rotates in the opposite direction. Due to the one-way bearing 5, the gyro 3 drives the outer ring of the one-way bearing 5 to rotate in the opposite direction, and the outer ring of the one-way bearing 5 cannot drive its inner ring to rotate in the opposite direction. The main shaft 4 will be in an inertial state and will not rotate, so that the propulsion mechanism can only generate forward thrust but not reverse thrust. In addition, when the user's single leg or double legs step on the thrust in any state, the other leg is not restricted by its state and can generate thrust as required to maximize the thrust, thereby improving the swimming experience effect.Moreover, the device is also very suitable for disabled people with only one leg, which is different from the existing technology that requires two legs to work together to generate thrust, thereby improving the user's swimming experience. ;

[0043] In the present embodiment, as a preferred embodiment of the above embodiment, in order to improve the transmission effect, the acceleration mechanism includes a housing bracket 10 and a ring gear 11. The lower end surface of the housing bracket 10 has an opening, and the open end of the ring gear 11 extends to the inside of the housing bracket 10 with a predetermined distance. The main shaft 4 passes through the lower swing housing 2 and the housing bracket 10 in sequence and is connected to a primary planetary carrier 12. The lower end surface of the primary planetary carrier 12 is evenly connected with a plurality of primary planetary gears 13 along the circumferential direction. The outer parts of the plurality of primary planetary gears 13 are respectively meshed with the ring teeth provided on the ring gear 11 for transmission. The plurality of primary planetary gears 13 are internally meshed with a secondary planetary carrier 14 for transmission. The lower end surface of the secondary planetary carrier 14 is evenly connected with a plurality of secondary planetary gears 15 along the circumferential direction. The outer parts of the plurality of secondary planetary gears 15 are respectively meshed with the ring teeth provided on the ring gear 11 for transmission. The plurality of secondary planetary gears 15 are internally meshed with a transmission gear 16 for transmission. A transmission shaft 17 is connected to the transmission gear 16. The upper end of the transmission shaft 17 is rotatably connected to the lower end of the secondary planetary carrier 14 through a bearing. The lower end of the transmission shaft 17 passes through The gear ring 11 extends to the outside and is connected to the upper end of the propulsion mechanism; the acceleration mechanism is set to two levels, and of course it can be increased or decreased as needed. By setting the acceleration mechanism, the best transmission ratio can be obtained to obtain greater thrust; in order to improve the stability of the acceleration mechanism, the end faces of the housing bracket 10 and the first-level planetary carrier 12 that are close to each other, and the end faces of the first-level planetary carrier 12 and the second-level planetary carrier 14 that are close to each other are provided with bearings; during the transmission process, the lower end of the main shaft 4 drives the first-level planetary carrier 12 to rotate, the first-level planetary carrier 12 makes the first-level planetary gear 13 rotate and revolve, the first-level planetary gear 13 drives the second-level planetary carrier 14 to rotate, so that the second-level planetary gear 15 rotates and revolves, and the first-level planetary gear 13 and the second-level planetary gear 15 are both meshed with the ring teeth set on the fixed gear ring 11, so that the second-level planetary gear 15 drives the transmission gear 16 to rotate, and since the transmission shaft 17 is connected to the transmission gear 16, the output end of the transmission shaft 17 drives the propulsion mechanism to operate, that is, drives the turbine blades 21 to rotate to generate forward thrust.

[0044] In this embodiment, as a preferred embodiment of the above embodiment, the propulsion mechanism includes a pressure chamber 18, a water inlet 19 is provided at the lower end of the pressure chamber 18, a drain outlet 20 is provided on the side of the pressure chamber 18, turbine blades 21 are provided in the pressure chamber 18, and the lower end of the transmission shaft 17 extends into the pressure chamber 18 and is connected to the turbine blades 21.

[0045] Specifically, in order to ensure the stability of the propulsion mechanism, a fixing frame 22 is arranged between the inner wall of the pressure chamber 18 and the turbine blades 21. The fixing frame 22 includes two parallel fixing rings 221. A grid blade 222 is connected between the two fixing rings 221. The projection of the grid blade 222 in the annular surface of the fixing ring 221 has a predetermined angle with the tangent direction of the fixing ring 221, so that the water at the drain outlet 20 is drained to the outside of the drain outlet 20. The pressure chamber 18, the grid blade 222 and the predetermined angle thereof are set to achieve the drainage effect. A skeleton 223 is arranged on one of the fixing rings 221. A bearing seat is provided at the inner center of the skeleton 223 and is rotatably connected to the turbine blade 21. The outer ring of the fixing ring 221 outside the skeleton 223 is threadedly connected to the water inlet 19 of the pressure chamber 18, thereby facilitating the fixing of the fixing frame 22.

[0046] In this embodiment, in order to improve the guiding effect of the pull rope 9 and make the pull rope 9 more stable during the pulling or contraction process, the guiding mechanism includes a guiding port arranged between the upper rotating shell 1 and the lower rotating shell 2, and a fixed rope block 25 is arranged in the guiding port. The upper and lower end surfaces of the fixed rope block 25 are provided with guide grooves 26, and the two guide grooves 26 are respectively provided with two guide wheels 27 along the front and rear directions. The other end of each pull rope 9 extends to the outside through a guide hole formed between the two guide wheels 27 arranged on the same guide groove 26, and one end of the guide wheel 27 is rotatably connected to the fixed rope block 25 through a column pin, and the other end of the guide wheel 27 is rotatably connected to the upper rotating shell 1 and the lower rotating shell 2 respectively through a column pin, and the fixed rope block 25 is fixedly connected to the upper rotating shell 1 and the lower rotating shell 2 respectively through a column pin.

[0047] It also includes a guide cone 28, which is a hollow structure and has a bottle body and a bottle cap. The guide cone 28 is arranged on the opposite side of the drain outlet 20. The lower rotary shell 2, the shell bracket 10 and the pressure chamber 18 are all provided with ribs 29 on the side walls close to the guide cone 28. The guide cone 28 is provided with a dovetail groove 30 matching the ribs 29. A locking tongue is provided at one end of the dovetail groove and a sealing head is provided at the other end. The end of the guide cone 28 away from the upper rotary shell 1 is in a pointed cone shape, and a bottle cap is provided at the pointed cone.

[0048] Among them, in order to facilitate the fixing of the device on the user and achieve the effect of convenient disassembly and assembly, it also includes a plurality of connecting components arranged on the circumference of the upper rotating shell 1, and the connecting components are in a locked state when subjected to force in a predetermined direction. When the connecting components are not subjected to external force, they can be rotated by a predetermined angle and can be disassembled and assembled by plugging; the plurality of connecting components are connected and fixed by straps and worn on the swimmer; after being worn and fixed, the free-pedaling swimming booster device must be located between the swimmer's waist in front of the abdomen.

[0049] Specifically, the connecting component includes a plug slot 31 and a plug hook 32. The plug slot 31 is circumferentially arranged on the upper rotating shell 1. The opening of the plug slot 31 is arranged away from the side of the rotating body 3. The plug slot 31 has a fan-shaped structure to facilitate the rotation of the plug hook 32. A limiting block 33 is arranged on one side of the slot opening of the plug slot 31. One end of the plug hook 32 extends to the bottom of the plug slot 31. The bottom of the plug slot is cylindrical. The mating surface of the plug hook is the same cylindrical. The plug hook can be rotated in the plug slot at a predetermined angle. The other end of the plug hook 32 is located outside the plug slot 31. A limiting slot 34 is arranged on the plug hook 32. The hook 32 is in its initial state and can be assembled and disassembled by plugging in. When the plug-in hook 32 is rotated to a predetermined angle, the limit groove 34 cooperates with the limit block 33 to achieve locking. The connecting component can be set at the desired position according to the force direction; the force direction of the two symmetrical connecting components is located in the upper surface direction of the upper rotary shell 1, and the other connecting component, i.e., the connecting component adjacent to the guide cone 28, has a force direction located in the direction of the guide cone 28, which is toward the user's head. It is connected to the connecting component by using a strap or the like. Under force, the connecting component is in a locked state, and can be disassembled by rotating a predetermined angle after being removed.

[0050] Among them, in order to distinguish whether it is in a locked or pluggable state, a K-type block 35 is symmetrically arranged on the plug hook 32 located outside the plug slot 31, and one end of the K-type block 35 is in a suspended state. The K-type block 35 has the function of distinguishing whether the plug hook 32 is in a locked or removable state when subjected to an external force in a predetermined direction.

[0051] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A free-pedaling swimming booster device, comprising an upper rotating housing (1) and a lower rotating housing (2) arranged in an upper and lower manner, characterized in that: A gyratory body (3) is symmetrically arranged in the upper and lower parts of the cavity formed between the upper gyratory shell (1) and the lower gyratory shell (2); a main shaft (4) is arranged in the cavity; two one-way bearings (5) are sequentially connected to the shaft body of the main shaft (4) in upper and lower parts; the outer rings of the two one-way bearings (5) are respectively connected to the corresponding gyratory bodies (3); and the upper end of the main shaft (4) is rotatably connected to the bearing seat of the upper gyratory shell (1) through the bearing; The end surfaces of the two gyratory bodies (3) that are away from each other are provided with mounting grooves (6), a scroll spring (7) is installed in the mounting groove (6), one end of the scroll spring (7) is fixed to the groove wall of the mounting groove (6), and the other end of the scroll spring (7) is respectively connected to the bearing seat portion of the upper gyratory shell (1) and the bearing seat portion of the lower gyratory shell (2); The two rotating bodies (3) are provided with rope grooves (8) in the circumferential direction, and a pull rope (9) is wound around the rope groove (8). One end of the pull rope (9) is fixed to the bottom of the rope groove (8). A guide mechanism is provided in the shell wall of the upper rotating shell (1) and the lower rotating shell (2). The other end of the pull rope (9) extends to the outside through the guide mechanism and is respectively connected to the legs and feet of the user. The user steps on the pull rope to put it in a tightened state outward. The lower end of the main shaft (4) is rotatably connected to the bearing seat of the lower rotary shell (2) and is connected to an acceleration mechanism through the bearing seat of the lower rotary shell (2); the acceleration mechanism is connected to a propulsion mechanism on a side away from the lower rotary shell (2); and it also includes a plurality of connection components arranged on the circumference of the upper rotary shell (1) and a strap, wherein the plurality of connection components are connected and fixedly worn on the swimmer through the strap.

2. The free-pedaling swimming booster device according to claim 1, characterized in that: The acceleration mechanism comprises a housing support (10) and a gear ring (11); the housing support (10) has an opening on its lower end surface; the gear ring (11) has an opening on its open end extending to a predetermined distance from the inside of the housing support (10); the main shaft (4) passes through the lower slewing housing (2) and the housing support (10) in sequence and is connected to a primary planet carrier (12); the primary planet carrier (12) has a plurality of primary planetary gears (13) uniformly connected to its lower end surface along the circumferential direction; the plurality of primary planetary gears (13) are respectively meshed with the ring teeth provided on the gear ring (11) for transmission; the plurality of primary planetary gears (13) are internally meshed with the ring teeth provided on the gear ring (11) for transmission. The meshing transmission comprises a secondary planet carrier (14), the lower end surface of the secondary planet carrier (14) being evenly connected to a plurality of secondary planetary gears (15) along a circumferential direction, the exteriors of the plurality of secondary planetary gears (15) being meshingly transmitted with ring teeth provided on the ring gear (11), the interiors of the plurality of secondary planetary gears (15) being meshingly transmitted with a transmission gear (16), the transmission gear (16) being connected to a transmission shaft (17), the upper end of the transmission shaft (17) being rotatably connected to the lower end of the secondary planet carrier (14), and the lower end of the transmission shaft (17) passing through the ring gear (11) extending to the exterior to be connected to the upper end of the propulsion mechanism.

3. The free-pedaling swimming booster device according to claim 2, characterized in that: The propulsion mechanism comprises a pressure chamber (18), a water inlet (19) is provided at the lower end of the pressure chamber (18), a water outlet (20) is provided at the side of the pressure chamber (18), turbine blades (21) are provided in the pressure chamber (18), and the lower end of the transmission shaft (17) extends into the pressure chamber (18) and is connected to the turbine blades (21).

4. The free-pedaling swimming booster device according to claim 3, characterized in that: A fixing frame (22) is provided between the inner wall of the pressure chamber (18) and the turbine blade (21), the fixing frame (22) comprising two fixing rings (221) arranged in parallel, a grid blade (222) being connected between the two fixing rings (221), a projection of the grid blade (222) within the annular surface of the fixing ring (221) having a predetermined angle with a tangent direction of the fixing ring (221), a frame (223) being provided on one of the fixing rings (221), a bearing seat being provided at the inner center of the frame (223) and being rotatably connected to the turbine blade (21), and an outer ring of the fixing ring (221) outside the frame (223) being threadedly connected to a water inlet (19) of the pressure chamber (18).

5. The free-pedaling swimming booster device according to claim 1, characterized in that: A plurality of ball head grooves (23) are arranged along the circumferential direction on the adjacent end surfaces of the two gyrating bodies (3); a connecting hole (24) is arranged on the gyrating body (3); both ends of the connecting hole (24) are respectively connected to the rope groove (8); the midpoint of the connecting hole (24) coincides with the midpoint of one of the ball head grooves (23); one end of the pull rope (9) passes through the connecting hole (24) and the ball head groove (23) in sequence and is tied into a ball shape at the end of the pull rope (9) and placed in the ball head groove (23) for connection and fixation.

6. The free-pedaling swimming booster device according to claim 1, characterized in that: The guide mechanism comprises a guide opening arranged between an upper swing shell (1) and a lower swing shell (2), a fixed rope block (25) being arranged in the guide opening, a guide groove (26) being arranged on the upper and lower end surfaces of the fixed rope block (25), two guide grooves (26) being respectively arranged with two guide wheels (27) in the front-rear direction, the other end of each of the pull ropes (9) extending to the outside through a guide hole formed between two guide wheels (27) arranged on the same guide groove (26), one end of the guide wheel (27) being rotatably connected to the fixed rope block (25) through a column pin, the other end of the guide wheel (27) being rotatably connected to the upper swing shell (1) and the lower swing shell (2) through a column pin, and the fixed rope block (25) being respectively fixedly connected to the upper swing shell (1) and the lower swing shell (2) through a column pin.

7. The free-pedaling swimming booster device according to claim 3, characterized in that: The invention also comprises a guide cone (28), the guide cone (28) is a hollow structure and has a bottle body and a bottle cap, the guide cone (28) is arranged on the opposite side of the drain outlet (20), the lower swirl shell (2), the shell bracket (10) and the pressure chamber (18) are all provided with ribs (29) on the side walls close to the guide cone (28), the guide cone (28) is provided with a dovetail groove (30) matching the ribs (29), one end of the dovetail groove (30) is provided with a locking tongue, and the other end is provided with a sealing head.

8. The free-pedaling swimming booster device according to any one of claims 1 to 7, characterized in that: The connecting component is in a locked state when subjected to force in a predetermined direction, and can be rotated by a predetermined angle and disassembled and assembled by plugging when not subjected to external force.

9. The free-pedaling swimming booster device according to claim 8, characterized in that: The connecting assembly comprises a plug-in slot (31) and a plug-in hook (32); the plug-in slot (31) is circumferentially arranged on the upper rotating shell (1); the plug-in slot (31) has an opening arranged away from the rotating body (3); the plug-in slot (31) has a fan-shaped structure; a limiting block (33) is arranged on one side of the slot opening of the plug-in slot (31); one end of the plug-in hook (32) extends to the bottom of the plug-in slot (31); the bottom of the plug-in slot (31) is cylindrical; The mating surface of the plug hook (32) is of the same cylindrical type. The plug hook (32) can be rotated in the plug slot (31) at a predetermined angle. The other end of the plug hook (32) is located outside the plug slot (31). A limit slot (34) is provided on the plug hook (32). The plug hook (32) is disassembled and assembled by plugging in an initial state. When the plug hook (32) is rotated to a predetermined angle, the limit slot (34) cooperates with the limit block (33) to achieve locking.

10. The free-pedaling swimming booster device according to claim 9, characterized in that: A K-shaped block (35) is symmetrically arranged on the plug hook (32) located outside the plug slot (31), one end of the K-shaped block (35) is in a suspended state, and the K-shaped block (35) has the function of distinguishing whether the plug hook (32) is in a locked state or a detachable state when the plug hook (32) is subjected to an external force in a predetermined direction.

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