CN112156421B

CN112156421B - Multi-functional sports physical stamina low limbs strength training equipment

Info

Publication number: CN112156421B
Application number: CN202011193395.3A
Authority: CN
Inventors: 李政
Original assignee: East China Jiaotong University
Current assignee: East China Jiaotong University
Priority date: 2020-10-30
Filing date: 2020-10-30
Publication date: 2021-08-10
Anticipated expiration: 2040-10-30
Also published as: CN112156421A

Abstract

A multifunctional physical fitness lower limb strength training device comprises a base, wherein a lying plate is fixedly installed on one side of the top side of the base through a stand column, the lower end of the lying plate is fixedly connected with the lower end of one side of a seat plate, the front end and the rear end of the upper end of the seat plate are respectively and fixedly connected with the lower end of an optical axis, the periphery of the optical axis is respectively sleeved with a sliding sleeve in a sliding mode, and the adjacent sides of the sliding sleeves are fixedly connected through transverse plates; the opposite side on base top side passes through stand fixed mounting box, and sliding mounting only can the removal water tank that reciprocates in the box, removes the top side opening of water tank, the first fixed pulley of one side fixed mounting at box top, upper and lower both sides on box right side fixed mounting second fixed pulley, third fixed pulley in proper order. The dumbbell piece water-saving exercise machine has a simple structure and ingenious design, the water replaces dumbbell pieces, the cost is greatly reduced, meanwhile, the load size can be adjusted in a stepless mode, different requirements are met, and the load can change automatically and circularly, so that the phenomenon that one load is used for exercise for a long time is avoided, and the activity of muscles is increased.

Description

Multi-functional sports physical stamina low limbs strength training equipment

Technical Field

The invention belongs to the field of fitness equipment, and particularly relates to multifunctional physical fitness lower limb strength training equipment.

Background

The lower limb strength training is the basic training of physical training, and in order to increase the strength of the lower limb strength training, load-bearing training is generally adopted, and the kicking device is an adopted apparatus for the lower limb strength load-bearing training; however, the load of the back pedal device generally uses the dumbbell pieces, the load is adjusted by replacing the dumbbell pieces, the operation is complex, the price of the dumbbell pieces is high, the input cost is increased, the dumbbell pieces are frequently replaced, the abrasion to equipment is high, the quality of the dumbbell pieces is rated, stepless adjustment to the load cannot be achieved, meanwhile, in order to reduce the replacement frequency of the dumbbell pieces, exercise of the large load directly during exercise can not be effectively heated, or the exercise of heating directly is forgotten, the physical damage is large, and the actual demand cannot be met, so that the multifunctional physical fitness lower limb strength training device is invented.

Disclosure of Invention

The invention provides multifunctional physical fitness lower limb strength training equipment, which is used for overcoming the defects in the prior art.

The invention is realized by the following technical scheme:

a multifunctional physical fitness lower limb strength training device comprises a base, wherein a lying plate is fixedly installed on one side of the top side of the base through a stand column, the lower end of the lying plate is fixedly connected with the lower end of one side of a seat plate, the front end and the rear end of the upper end of the seat plate are respectively and fixedly connected with the lower end of an optical axis, the periphery of the optical axis is respectively sleeved with a sliding sleeve in a sliding mode, and the adjacent sides of the sliding sleeves are fixedly connected through transverse plates; the other side of the top side of the base is fixedly provided with a box body through an upright post, a movable water box which can only move up and down is arranged in the box body in a sliding manner, the top side of the movable water box is provided with an opening, a first fixed pulley is fixedly arranged on one side of the top of the box body, a second fixed pulley and a third fixed pulley are sequentially and fixedly arranged on the upper side and the lower side of the right side of the box body, a wire hole is formed in the top of the right side of the box body, a pull rope is arranged in the wire hole, one end of the pull rope passes through the top side of the first fixed pulley and is fixedly connected with a movable water box connecting block, the other end of the pull rope passes through the top side of the second fixed pulley and the bottom side of the third fixed pulley and is fixedly connected with a transverse plate, the other side of the top of the box body is fixedly provided with a water storage box, a water injection hole communicated with the outside of the box body is formed in the top of the water storage box, a first through hole is formed in the first through hole, an inverted U-shaped pipe is fixedly arranged in the first through hole, a drain hole in the bottom of the movable water box body, a drain hole is formed in the other side of the water storage box, the periphery of one side fixed connection standpipe of removal water tank, the upper end and the second through-hole of standpipe pass through the hose intercommunication and are connected, movable mounting inner tube in the standpipe, the airtight sliding contact cooperation in periphery and the interior week of standpipe that can, the lower extreme of inner tube is connected through the several telescopic link with the bottom of box, the movable mounting piston in the inner tube, the airtight sliding contact cooperation in periphery and the interior week of inner tube of piston, the piston is connected with the box, the fixed mounting check valve in the second through-hole.

According to the multifunctional physical fitness lower limb strength training equipment, the bottom side of the box body is provided with the third through hole corresponding to the piston, the third through hole is internally provided with the mounting screw rod in a rotating mode through the sealing bearing, the upper end thread of the periphery of the screw rod is provided with the internal thread pipe, the upper end of the internal thread pipe is fixedly connected with the bottom side of the piston, and the bottom side of the piston is connected with the bottom of the box body through the small telescopic rod.

As above a multi-functional sports physical stamina low limbs strength training equipment, the removal water tank bottom side be equipped with reciprocal lead screw pair, the lead screw of reciprocal lead screw pair passes through the bearing rotation with the removal water tank and is connected, the below of wash port is equipped with the breakwater, the top side of breakwater and the bottom side sliding contact cooperation of removal water tank, the screw and the breakwater of reciprocal lead screw pair pass through connecting rod fixed connection, the screw of reciprocal lead screw pair only can be followed the lead screw and removed about, the right-hand member of the lead screw of reciprocal lead screw pair passes through one-way bearing rotation installation gear, the top of gear rear side is equipped with the bar rack, the bar rack is connected with the box, the gear can cooperate with the.

As above a multi-functional sports physical stamina low limbs strength training equipment, bar rack be connected through the inserted bar with the box, the right side of box corresponds the bar rack and sets up the several jack, movable mounting inserted bar respectively in the jack, the inner of inserted bar and the right side fixed connection of bar rack, the same movable plate of outer end fixed connection of inserted bar, set up horizontal screw through-hole on the movable plate, screw thread installation double-screw bolt in the screw through-hole, the left end of double-screw bolt passes through the bearing rotation with the right side of box and is connected.

According to the multifunctional physical fitness lower limb strength training equipment, the front side and the rear side of the movable water tank are respectively provided with the polished rod, the upper end and the lower end of the polished rod are fixedly connected with the box body, the periphery of the polished rod is sleeved with the sleeve in a sliding mode, and the sleeve is fixedly connected with the movable water tank respectively.

According to the multifunctional physical fitness lower limb strength training equipment, the exhaust hole is formed in the top of one side of the water storage tank, and the sealing cover is installed on the upper end of the water injection hole in a threaded mode.

The invention has the advantages that: the dumbbell piece water-saving exercise machine is simple in structure and ingenious in conception, the cost is greatly reduced by using water instead of dumbbell pieces, the load size can be adjusted in a stepless mode, different requirements are met, the load can change automatically and circularly, the phenomenon that one load is used for exercise for a long time is avoided, the activity of muscles is increased, when the dumbbell piece water-saving exercise machine is used, a low-load warming-up stage is arranged, the phenomenon that the body is damaged by forgetting warming-up is avoided, the market requirements can be met, and the dumbbell piece water-saving exercise machine is suitable for popularization. The invention is placed at a proper position, clean water is injected into the water storage tank through the water injection hole, when the water level entering the water storage tank is over the top of the inverted U-shaped pipe, the inverted U-shaped pipe forms siphon to continuously discharge the water in the water storage tank until the water in the water storage tank is completely discharged, the water discharged by the inverted U-shaped pipe enters the movable water tank through the top side of the movable water tank, the water in the movable water tank is discharged into the bottom of the tank body through the water discharge hole until the water level at the bottom of the tank body is over the lower end of the inner pipe, and the water injection is stopped, so that the installation is completed; when the device is used, firstly, the user lies on the top side of the lying plate, the buttocks lean against the right side of the seat plate, then the feet are pedaled on the bottom side of the transverse plate, the transverse plate drives the sliding sleeve to move up and down along the optical axis by stretching and bending legs, the transverse plate moves up and down by pulling the movable water tank through the pull rope when moving up, the transverse plate moves down and moves down by pulling the pull rope when the movable water tank moves down, and at the moment, because no clear water exists in the movable water tank, the lower limb bending and stretching load of the user; in the process of moving the water tank up and down, the movable water tank drives the vertical pipe to move up and down, when the vertical pipe starts to move up, the inner pipe moves up under the action of friction force between the outer periphery of the inner pipe and the inner periphery of the vertical pipe, the telescopic rod is stretched until the telescopic rod is pulled to be the longest, the inner pipe does not continue to move up, the lower end of the inner pipe is still positioned below the liquid level of water at the moment, meanwhile, the piston moves out of the inner pipe and continues to move up along with the vertical pipe, the vertical pipe and the inner space of the inner pipe are increased to form negative pressure, so that clear water is sucked into the inner pipe, the vertical pipe (the lower end of the inner pipe is always positioned below the liquid level) is sucked into the inner pipe, when the movable water tank drives the vertical pipe to move down, the inner pipe firstly moves up and down under the action of friction force between the outer periphery of the inner pipe, the telescopic rod is compressed until the telescopic rod is compressed to be the shortest, the inner pipe does not continue to move down, the piston enters the inner pipe again, and the lower end of the inner pipe is closed, follow the standpipe and continue the downstream, the standpipe passes through the hose with the water in the inner tube, the second through-hole is impressed in the water storage box, take exercise along with the continuous warm-up of user, the water in the water storage box increases, to the liquid level do not cross the top of falling U type pipe, it forms the siphon to begin to pour into the water in the water storage box constantly in the removal water tank to fall U type pipe, because wash port displacement is less than the type pipe of falling U type to the removal water tank water injection volume, thereby make the removal water tank water constantly increase, thereby increase the load that the diaphragm reciprocated.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic structural view of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

A multifunctional physical fitness lower limb strength training device comprises a base 1, wherein a lying plate 2 is fixedly installed on one side of the top side of the base 1 through a stand column, the lower end of the lying plate 2 is fixedly connected with the lower end of one side of a seat plate 3, the front end and the rear end of the upper end of the seat plate 3 are respectively fixedly connected with the lower end of an optical axis 4, the periphery of the optical axis 4 is respectively slidably sleeved with a sliding sleeve 5, and the adjacent sides of the sliding sleeves 5 are fixedly connected through a transverse plate 6; the other side of the top side of the base 1 is fixedly provided with a box body 7 through an upright post, a movable water tank 8 which can only move up and down is arranged in the box body 7 in a sliding manner, the top side of the movable water tank 8 is provided with an opening, a first fixed pulley 9 is fixedly arranged on one side of the top of the box body 7, a second fixed pulley 10 and a third fixed pulley 11 are sequentially and fixedly arranged on the upper side and the lower side of the right side of the box body 7, a wire hole 12 is formed in the top of the right side of the box body 7, a pull rope 13 is arranged in the wire hole 12, one end of the pull rope 13 passes through the top side of the first fixed pulley 9 and is fixedly connected with the movable water tank 8, the other end of the pull rope 13 sequentially passes through the top side of the second fixed pulley 10 and the bottom side of the third fixed pulley 11 and is fixedly connected with a transverse plate 6, a water storage tank 14 is fixedly arranged on the other side of the top of the box body 7, a water injection hole 15 communicated with the outside of the box body 7 is formed in the top of the water storage tank 14, a first through hole 16 is fixedly provided with an inverted U-shaped pipe 17, one end of an inverted U-shaped pipe 17 is positioned at the bottom of the water storage tank 14, the other end of the inverted U-shaped pipe is positioned above the movable water tank 8, a drain hole 19 is formed in the bottom of the movable water tank 8, a second through hole 20 is formed in the other side of the water storage tank 14, one side of the movable water tank 8 is fixedly connected with the outer periphery of a vertical pipe 21, the upper end of the vertical pipe 21 is communicated and connected with the second through hole 20 through a hose 22, the top side of the vertical pipe 21 is closed, a reserved hole is formed in the top side of the vertical pipe 21 and communicated and connected with one end of the hose 22, the other end of the hose 22 is communicated and connected with the second through hole 20, an inner pipe 23 is movably installed in the vertical pipe 21, the outer periphery of the inner pipe 23 is in airtight sliding contact and matching with the inner periphery of the vertical pipe 21, the lower end of the inner pipe 23 is connected with the bottom of the box body 7 through a plurality of telescopic rods 24, a piston 25 is movably installed in 23, the outer periphery of the piston 25 is in airtight sliding contact and matching with the inner periphery of the inner pipe 23, a check valve 26 is fixedly installed in the second through hole 20. The dumbbell piece water-saving exercise machine is simple in structure and ingenious in conception, the cost is greatly reduced by using water instead of dumbbell pieces, the load size can be adjusted in a stepless mode, different requirements are met, the load can change automatically and circularly, the phenomenon that one load is used for exercise for a long time is avoided, the activity of muscles is increased, when the dumbbell piece water-saving exercise machine is used, a low-load warming-up stage is arranged, the phenomenon that the body is damaged by forgetting warming-up is avoided, the market requirements can be met, and the dumbbell piece water-saving exercise machine is suitable for. The invention is placed at a proper position, clean water is injected into the water storage tank 14 through the water injection hole 15, when the water level entering the water storage tank 14 is over the top of the inverted U-shaped pipe 17, the inverted U-shaped pipe 17 forms siphon to continuously discharge the water in the water storage tank 14 until the water in the water storage tank 14 is drained, the water discharged by the inverted U-shaped pipe 17 enters the movable water tank 8 through the top side of the movable water tank 8, the water in the movable water tank 8 is discharged into the bottom of the tank body 7 through the water discharge hole 19 until the water level at the bottom of the tank body 7 is over the lower end of the inner pipe 23, the water injection is stopped, and the installation is completed; when the invention is used, firstly, the user lies on the top side of the lying plate 2 with the back, the buttocks lean against the right side of the seat plate 3, then feet are pedaled on the bottom side of the transverse plate 6, the transverse plate 6 drives the sliding sleeve 5 to move up and down along the optical axis 4 by stretching legs and bending legs, the transverse plate 6 pulls the movable water tank 8 to move up through the pull rope 13 when moving up, the transverse plate 6 is pulled to move down through the pull rope 13 when the movable water tank 8 moves down, and at the moment, because no clear water exists in the movable water tank 8, the lower limb bending and stretching load of the user is small and the user can be used for warm-up exercise; in the process of moving the water tank 8 up and down, the moving water tank 8 drives the vertical pipe 21 to move up and down, when the vertical pipe 21 starts to move up, the inner pipe 23 moves up under the action of friction force between the outer periphery of the inner pipe 23 and the inner periphery of the vertical pipe 21, the telescopic rod 24 is stretched until the telescopic rod 24 is pulled to the longest, the inner pipe 23 does not continue to move up, the lower end of the inner pipe 23 is still positioned below the liquid level of water, the piston 25 moves out of the inner pipe 23 and continues to move up along with the vertical pipe 21, the inner space of the vertical pipe 21 and the inner space of the inner pipe 23 are increased to form negative pressure, so that clean water is sucked into the inner pipe 23 and the vertical pipe 21, the lower end of the inner pipe 23 is always positioned below the liquid level, when the moving water tank 8 drives the vertical pipe 21 to move down, the inner pipe 23 moves up and down under the action of friction force between the outer periphery of the inner pipe 23 and the inner periphery of the vertical pipe 21, the telescopic rod 24 is compressed until the telescopic rod 24 is compressed to the shortest, the inner tube 23 no longer continues to move downwards, the piston 25 reenters the inner tube 23, the lower end of the inner tube 23 is sealed, the inner tube continues to move downwards along with the vertical tube 21, the vertical tube 21 and the water in the inner tube 23 pass through the hose 22, the second through hole 20 is pressed into the water storage tank 14, the user can exercise while warming up continuously, the water in the water storage tank 14 is increased, the top of the U-shaped tube 17 is submerged to the liquid level, the U-shaped tube 17 forms siphon, the water in the water storage tank 14 is injected into the movable water tank 8 continuously, the water discharging amount of the water discharging hole 19 is smaller than the water injecting amount of the U-shaped tube 17 to the movable water tank 8, the water in the movable water tank 8 is increased continuously, and the load of the transverse plate 6 moving up and down is increased.

Specifically, as shown in the drawing, a third through hole 30 is formed in the bottom side of the case 7 corresponding to the piston 25 in the embodiment, a screw 31 is rotatably mounted in the third through hole 30 through a sealed bearing, an internal threaded pipe 32 is threadedly mounted on the upper end of the outer periphery of the screw 31, the upper end of the internal threaded pipe 32 is fixedly connected with the bottom side of the piston 25, and the bottom side of the piston 25 is connected with the bottom of the case 7 through a small telescopic rod 33. The screw 31 is rotated, so that the internal thread pipe 32 drives the piston 25 to move up and down, the small telescopic rod 33 is stretched or compressed, when the piston 25 moves out of the inner pipe 23 and the vertical pipe 21 moves downwards again, water in the inner pipe 23 is discharged into the bottom of the box body 7, and water is not injected into the water storage tank 14.

Specifically, as shown in the figure, a reciprocating screw pair 40 is arranged on the bottom side of the movable water tank 8 in the embodiment, a screw of the reciprocating screw pair 40 is rotatably connected with the movable water tank 8 through a bearing, a water baffle 41 is arranged below the drain hole 19, the top side of the water baffle 41 is in sliding contact fit with the bottom side of the movable water tank 8, a nut of the reciprocating screw pair 40 is fixedly connected with the water baffle 41 through a connecting rod 42, the nut of the reciprocating screw pair 40 can only move left and right along the screw, a gear 43 is rotatably mounted at the right end of the screw of the reciprocating screw pair 40 through a one-way bearing, a bar-shaped rack 44 is arranged above the rear side of the gear 43, the bar-shaped rack 44 is connected with the tank body 7, and the gear 43 can be in meshing fit with the bar-shaped rack 44. When the movable water tank 8 moves up and down, the reciprocating screw pair 40, the connecting rod 42, the water baffle 41 and the gear 43 are driven to move up and down, when the gear 43 passes through the front side of the strip-shaped rack 44, the gear 43 rolls along the strip-shaped rack 44, when the gear 43 rolls in the forward direction, the screw rod of the reciprocating screw pair 40 is driven to rotate through the one-way bearing, so that the screw of the reciprocating screw pair 40 drives the water baffle 41 to move left and right through the connecting rod 42, the water drain hole 19 is gradually closed by the water baffle 41, the water in the movable water tank 8 cannot be drained, and then the water is gradually opened, so that the water in the movable water tank 8 is drained through the water drain hole 19, the drainage speed of the water drain hole 19 is adjusted, when the drainage speed of the water drain hole 19 is higher than the speed of the inverted U-shaped pipe 17 for filling the water in the movable water tank 8, the gravity of the movable water tank 8 is reduced, at the lower limb training load is gradually reduced, otherwise, when the drainage speed of the drain hole 19 is lower than the speed of the inverted U-shaped pipe 17 for filling the water in the movable water tank 8, the weight of the movable water tank 8 is increased, and the training load of the lower limbs is gradually increased at the moment, so that the continuous change of the training load is realized, the load training is avoided from being used for a long time, and the activity of the training muscles is increased.

Further, as shown in the figure, the bar-shaped rack 44 described in this embodiment is connected to the box 7 through the insertion rod 50, the right side of the box 7 is provided with a plurality of insertion holes 51 corresponding to the bar-shaped rack 44, the insertion rods 50 are movably installed in the insertion holes 51, the outer periphery of the insertion rod 50 is in airtight sliding contact with the inner periphery of the insertion holes 51, the inner end of the insertion rod 50 is fixedly connected to the right side of the bar-shaped rack 44, the outer end of the insertion rod 50 is fixedly connected to the same moving plate 52, the moving plate 52 is provided with a transverse threaded through hole 53, the threaded through hole 53 is internally provided with a stud 54, and the left end of the stud 54 is rotatably connected to the right side of the box 7 through a bearing. The stud 54 is screwed, the stud 54 drives the moving plate 52, the inserted link 50 and the strip-shaped rack 44 to move left and right until the strip-shaped rack 44 moves to the rightmost side, and the gear 43 cannot be meshed with the strip-shaped rack 44 when moving up and down, so that the drainage speed of the drainage hole 19 is fixed.

Furthermore, as shown in the figure, the front and the back sides of the movable water tank 8 according to the embodiment are respectively provided with a polish rod 60, the upper and the lower ends of the polish rod are fixedly connected with the tank body 7, the periphery of the polish rod is slidably sleeved with a sleeve 61, and the sleeve 61 is respectively fixedly connected with the movable water tank 8. When the movable water tank 8 moves up and down, the movable water tank 8 drives the sleeve 61 to move up and down along the polish rod 60, and the sleeve 61 is in sliding fit with the polish rod 60 to guide and limit the movement of the movable water tank 8.

Furthermore, as shown in the figure, the top of one side of the water storage tank 14 according to the embodiment is provided with an air vent 70, and the upper end of the water injection hole 15 is internally threaded with a sealing cover 71. The sealing cover 71 can reduce the volatilization of water in the tank 7, and the air vent 70 makes the air pressure in the water storage tank 14 the same as that in the tank 7, thereby forming an effective siphon phenomenon.

Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.

Claims

1. A multifunctional physical fitness lower limb strength training device comprises a base (1), wherein a lying plate (2) is fixedly installed on one side of the top side of the base (1) through a stand column, the lower end of the lying plate (2) is fixedly connected with the lower end of one side of a seat plate (3), the front end and the rear end of the upper end of the seat plate (3) are respectively and fixedly connected with the lower end of an optical axis (4), a sliding sleeve (5) is respectively sleeved on the periphery of the optical axis (4) in a sliding mode, and the adjacent sides of the sliding sleeve (5) are fixedly connected through a transverse plate (6); the method is characterized in that: the other side of the top side of the base (1) is fixedly provided with a box body (7) through an upright post, a movable water tank (8) which can only move up and down is arranged in the box body (7) in a sliding manner, the top side of the movable water tank (8) is open, a first fixed pulley (9) is fixedly arranged on one side of the top of the box body (7), a second fixed pulley (10) and a third fixed pulley (11) are sequentially and fixedly arranged on the upper side and the lower side of the right side of the box body (7), a wire hole (12) is formed in the top of the right side of the box body (7), a pull rope (13) is arranged in the wire hole (12), one end of the pull rope (13) passes through the top side of the first fixed pulley (9) and is fixedly connected with the movable water tank (8), the other end of the pull rope (13) passes through the top side of the second fixed pulley, a water injection hole (15) communicated with the outside of the box body (7) is formed in the top of the water storage tank (14), a first through hole (16) is formed in one side of the water storage tank (14), an inverted U-shaped pipe (17) is fixedly installed in the first through hole (16), a drain hole (19) is formed in the bottom of the movable water tank (8), the water discharge amount of the drain hole (19) is smaller than the water injection amount of the inverted U-shaped pipe (17) to the movable water tank (8), so that the water in the movable water tank (8) is continuously increased, the load of the up-and-down movement of the transverse plate (6) is increased, a second through hole (20) is formed in the other side of the water storage tank (14), one side of the movable water tank (8) is fixedly connected with the periphery of a vertical pipe (21), the upper end of the vertical pipe (21) is communicated and connected with the second through hole (20) through a hose (22), an inner pipe (23) is movably installed in the vertical pipe (21), the periphery of the inner pipe (23) is in airtight sliding contact with the inner periphery of the vertical pipe (21), the lower extreme of inner tube (23) is connected through several telescopic link (24) with the bottom of box (7), inner tube (23) moves up under the frictional force effect between inner tube (23) periphery and standpipe (21) internal periphery, telescopic link (24) are stretched, it is longest to be drawn telescopic link (24), inner tube (23) no longer continues upward movement, the lower extreme of inner tube (23) still is located under the liquid level of water this moment, movable mounting piston (25) in inner tube (23), the airtight sliding contact cooperation in the periphery of piston (25) and inner periphery of inner tube (23), piston (25) are connected with box (7), fixed mounting check valve (26) in second through-hole (20).

2. The physical lower limb strength training apparatus of claim 1, wherein: a third through hole (30) is formed in the bottom side of the box body (7) corresponding to the piston (25), a screw rod (31) is rotatably mounted in the third through hole (30) through a sealed bearing, an internal threaded pipe (32) is mounted at the upper end of the periphery of the screw rod (31) in a threaded mode, the upper end of the internal threaded pipe (32) is fixedly connected with the bottom side of the piston (25), and the bottom side of the piston (25) is connected with the bottom of the box body (7) through a small telescopic rod (33).

3. The physical lower limb strength training apparatus of claim 1, wherein: the water pump is characterized in that a reciprocating screw pair (40) is arranged on the bottom side of the movable water tank (8), a screw of the reciprocating screw pair (40) is rotatably connected with the movable water tank (8) through a bearing, a water baffle (41) is arranged below the drain hole (19), the top side of the water baffle (41) is in sliding contact with the bottom side of the movable water tank (8) in a sliding mode, a nut of the reciprocating screw pair (40) is fixedly connected with the water baffle (41) through a connecting rod (42), the nut of the reciprocating screw pair (40) can only move left and right along the screw, a gear (43) is rotatably installed at the right end of the screw of the reciprocating screw pair (40) through a one-way bearing, a bar-shaped rack (44) is arranged above the rear side of the gear (43), the bar-shaped rack (44) is connected with the tank body (7), and the gear (43) can be meshed with the bar-shaped rack (44).

4. The physical lower limb strength training apparatus of claim 3, wherein: the bar rack (44) is connected with the box body (7) through an inserting rod (50), a plurality of inserting holes (51) are formed in the right side of the box body (7) corresponding to the bar rack (44), the inserting rods (50) are movably mounted in the inserting holes (51) respectively, the inner ends of the inserting rods (50) are fixedly connected with the right side of the bar rack (44), the outer end of each inserting rod (50) is fixedly connected with the same moving plate (52), transverse threaded through holes (53) are formed in the moving plate (52), threaded through holes (53) are internally provided with threaded mounting studs (54), and the left ends of the studs (54) are rotatably connected with the right side of the box body (7) through bearings.

5. The physical lower limb strength training apparatus of claim 1, wherein: the movable water tank (8) is characterized in that a polish rod (60) is arranged on the front side and the rear side of the movable water tank respectively, the upper end and the lower end of the polish rod are fixedly connected with the tank body (7), a sleeve (61) is sleeved on the periphery of the polish rod in a sliding mode, and the sleeve (61) is fixedly connected with the movable water tank (8) respectively.

6. The physical lower limb strength training apparatus of claim 1, wherein: the top of one side of the water storage tank (14) is provided with an exhaust hole (70), and the upper end of the water injection hole (15) is internally provided with a sealing cover (71).