CN116672650A - Physical training auxiliary device for field athletes - Google Patents

Abstract

The invention provides an auxiliary physical training device for athletes, belongs to the technical field of athletic training equipment, and effectively solves the problems that the athletic athletes are inconvenient to train, difficult to normalize in training and poor in training effect when performing tensile belt resistance training. The technical scheme includes that along the track of runway bilateral symmetry setting and being located the below ground, track top cooperation has the weight case, weight case fixedly connected with pull rod, and the pull rod cooperation has the pulling force area, and weight case both sides correspond orbital position symmetry respectively and are provided with sliding plate and first damping gyro wheel and second damping gyro wheel, through the shifter cooperation respectively with the track between sliding plate and first damping gyro wheel and the second damping gyro wheel, the pulling force area is connected with auxiliary brake part. The invention has the beneficial effects that: the utility model provides a stable in structure, adjust accurate, wide application scope's track and field sportsman physical training auxiliary device.

Description

Physical training auxiliary device for field athletes

The scheme is a divisional application, and the name of the original application is: a field sportsman's strength training device, the filing date of former application is: 2022-08-31, filed under the number: 202211052278.4.

Technical Field

The invention relates to the technical field of track and field training equipment, in particular to an auxiliary device for physical training of track and field athletes.

Background

The utility model provides a training program that track and field athlete routinely goes on is indispensable training program, wherein the athlete of race program often can carry out the resistance training through the pulling force area, with the strength that increases shank and core muscle, thereby improve the achievement, the mode that adopts now generally is with pulling force area cover at the waist, the back is with pulling force area both ends by the trainer hand, the athlete is through the pulling force that overcomes the trainer goes forward to do running march, perhaps high leg-lifting march and training such as side sliding, the training in-process trainer is very hard, moreover, pull the steady output that can't keep the pulling force by the manual work, and the different training stages of different athletes are very different to the specific needs of pulling force be very different, the difference in this kind of needs is suitable for to the difficult pulling force that is used by the trainer, training details can't accomplish to refine, the data can directly influence training effect, at present have the mode of training with the pulling force rope on the tire, but the weight of different tires also can't accomplish more careful division and provide the interval scope of resistance, and the tire also has certain destructive effect to the athlete when continuous wear life is short on the tire, in addition, the component force can't be influenced to the stable effect when the athlete follows the runway in the running in the back.

Therefore, how to solve the above technical problems is a subject of the present invention.

Disclosure of Invention

In order to solve the defects of the prior art, the invention provides the physical training auxiliary device for the track and field athletes, which has the advantages of stable structure, accurate adjustment and wide application range.

The technical scheme adopted for solving the technical problems is as follows: the invention provides a physical training auxiliary device for a field athlete, which comprises rails symmetrically arranged along two sides of a runway and positioned below the ground, wherein a weight box is matched above the rails, the weight box is fixedly connected with a pull rod, and the pull rod is matched with a pull belt;

the two sides of the weight box are symmetrically provided with a sliding plate, a first damping roller and a second damping roller corresponding to the positions of the rails respectively, and the sliding plate is matched with the rails respectively through a conversion mechanism;

the tension band is connected with an auxiliary braking component.

The weight box is of a rectangular structure, two sides of the bottom of the weight box are provided with through-length sliding plates which are in sliding fit with the rails, two sides of each sliding plate are provided with first sliding grooves penetrating through the bottom of the weight box from bottom to top, and each first sliding groove is internally provided with a first damping roller;

and a plurality of second damping rollers are arranged at the bottom of each first wheel frame along the track direction.

Third sliding grooves are symmetrically formed in two sides of the inner wall of the first sliding groove, the third sliding grooves are in sliding connection with sliding strips on two sides of a second wheel frame, and the second wheel frame is connected with the first damping roller;

the conversion mechanism comprises a lifting assembly fixedly connected with the second wheel frame;

the lifting assembly comprises a first threaded rod fixedly connected with the center of the top of the second wheel frame and vertically arranged upwards, a first threaded sleeve is connected to the outer side of the upper portion of the first threaded rod in a threaded mode, the top of the first threaded sleeve is rotationally connected to the bottom of the first mounting plate, the bottom of the first threaded sleeve is rotationally connected to the top of the second mounting plate, supporting plates vertically arranged downwards are fixedly and symmetrically connected to the bottoms of the two sides of the second mounting plate, the bottoms of the supporting plates are fixedly connected with the inner wall of the bottom of the weight box, a first through hole matched with the first threaded rod is formed in the second mounting plate, and a fourth sliding groove communicated with the third sliding groove is formed in the inner side of each supporting plate;

the outer side of each first thread bush is coaxially sleeved with a first worm wheel, two first worm wheels positioned on the same side are respectively meshed with two sides of one first worm, the central parts of the two first worm wheels are coaxially sleeved with a second worm wheel, the two second worm wheels are respectively meshed with two sides of the second worm, and one end of the second worm is coaxially and fixedly connected with a crank extending to the outer side of the weight box;

both ends of the first worm and the second worm are rotatably connected to the inner wall of the weight box;

the lifting component is connected with the sliding plate through the linkage component.

The linkage assembly comprises second threaded rods which are fixedly connected with the tops of two sides of each sliding plate and are vertically upwards arranged, second threaded sleeves are connected to the outer sides of the upper parts of the second threaded rods in a threaded mode, the bottoms of the second threaded sleeves are rotatably connected to the inner walls of the bottoms of the weight boxes, the tops of the second threaded sleeves are rotatably connected to the bottoms of the third mounting plates, and second through holes matched with the second threaded rods are formed in the bottoms of the weight boxes;

each second thread bush is coaxially sleeved with a third worm wheel, each third worm wheel is meshed with a third worm, two ends of each third worm are respectively connected to the inner wall of the weight box and the fourth mounting plate in a rotating mode, a first gear is coaxially sleeved on the outer side of each third worm, the first gear is meshed with the second gear, the second gear is coaxially sleeved on the outer side of a rotating rod, two ends of the rotating rod are respectively connected to the inner wall of the weight box and the fourth mounting plate in a rotating mode, and the outer side of the rotating rod is coaxially sleeved with the third gear;

and a rack is vertically arranged on the outer wall of one side of each second wheel frame, and the rack is in movable fit with the third gear.

The four corner outer walls of the weight box are fixedly connected with fixing plates, the pull rod comprises a fixing rod vertically and fixedly connected to the top of the fixing plate, a third threaded rod is connected to the inner side of the fixing rod in a threaded mode, a penetrating through hole is coaxially formed in the center of the inner side of the fixing rod and the center of the inner side of the third threaded rod, a traction rope is penetrated in the through hole, the top end of the traction rope is located on the outer side of the top of the fixing rod and is fixedly connected with a connecting ring, and the bottom end of the traction rope is connected with the auxiliary braking component;

the two connecting rings positioned on the same side are in hooking fit with the hooks arranged at the two ends of the tension belt.

The auxiliary braking component comprises an installation box fixedly connected below each fixed plate, a lifting plate is vertically and slidably connected to the inner side of each installation box, the bottom end of the traction rope penetrates through the fixed plates and the top of each installation box and is fixedly connected with the top of the lifting plate, a spring is sleeved on the outer side of the traction rope positioned at the inner side of each installation box, and two ends of the spring are respectively and fixedly connected to the inner wall of the top of each installation box and the top of the lifting plate;

the center of the bottom of each lifting plate is fixedly connected with a vertical column which is arranged downwards, the vertical column penetrates through the bottom of the installation box and is fixedly connected with the center of the top of a horizontally arranged braking plate, and a plurality of braking blocks are uniformly arranged on the ground of the braking plate;

the stand is close to the top position and radially provided with through jacks, fixing holes are formed in two sides of the installation box corresponding to the jacks, and fixing bolts are inserted between the jacks and the corresponding fixing holes.

The weight box is made of metal, and the U-shaped fixed magnet matched with the crank is arranged on the outer wall of the weight box.

A plurality of placing boxes matched with the balancing weights are arranged in the balancing weight box.

The top of the weight box is movably matched with a cover plate.

The invention is practically used: according to the body height condition of a training athlete and the advancing direction of the athlete, a pull rod on one side is selected and the height of the pull rod is adjusted, a fixing bolt on the side is pulled out, a brake plate can be attached to a runway under the action of a spring, two ends of a pull belt are connected with connecting rings on a traction rope through hooks, the athlete can drive a weight box to advance along the runway to conduct resistance training by sleeving the pull rope at a waist position, the traction rope is pulled by the pull belt when the athlete advances, the brake plate is driven to ascend away from the runway by the traction rope, and when the athlete stops advancing, the weight box stops moving as soon as possible under the action of friction force or damping force no matter whether the slide plate slides with the track or the first damping roller or the second damping roller, the athlete is not bumped due to the action of inertia, and meanwhile when the athlete stops, the weight box moves forward due to inertia for a small distance, the traction rope is retracted under the action of the spring, and the brake plate is pushed to the runway at the same time, so that the whole braking of the weight box is further assisted.

The strength that different athletes need to fight resistance training in different training periods is different, even the different time points of same training all can have the difference to the demand of resistance size, when the resistance that the adjustment weight box provided, firstly place the balancing weight of different gravity in placing the box as required, then the rethread crank adjustment is with track effect is sliding plate or first damping gyro wheel or second damping gyro wheel, the adjustment mode of marcing is realized jointly with the increase and decrease combination of balancing weight and is provided different resistance, wherein the mode of marcing adjustment process is: the initial state is that the first damping roller is located at the lowest position, the second damping roller is located above the first damping roller and below the second sliding groove, the crank is firstly rocked to rotate the second worm, the second worm drives the second worm wheel to rotate, the second worm wheel drives the first worm to rotate, the first worm wheel drives the first worm wheel to rotate, the first worm wheel drives the first threaded sleeve to rotate, the first threaded sleeve drives the first screw to lift the first damping roller to the inner side of the first sliding groove to stop, at the moment, the second damping roller is in contact with the bottom of the track and is made into a weight box, the crank can be continuously rotated in the original direction to continuously lift the first wheel frame, the rack is meshed with the third gear to drive the third gear to rotate, the third gear drives the second gear to rotate, the first gear drives the third worm to rotate, the third worm drives the third worm wheel to rotate, the third worm wheel drives the second threaded sleeve to rotate, and accordingly the second threaded rod is driven to lift the second threaded rod, the sliding plate is lifted until the second damping roller is completely in the second sliding groove, and the bottom of the sliding plate 6 is in contact with the track.

The beneficial effects of the invention are as follows:

1. according to the invention, a trainer is not required to hold the tension belt by hand to help the athlete to complete resistance training, so that the physical expenditure of the trainer is greatly reduced;

2. the height of the pull rod is adjustable, so that athletes with different heights can be used;

3. the invention is matched with a special underground track, so that the use process is more stable;

4. the resistance provided by the invention is realized by increasing or decreasing the balancing weight and switching the combination modes of the first damping roller, the second damping roller and the sliding plate which are respectively matched with the track, so that different resistances can be provided stably, different training times of different athletes are suitable, and the applicability is wide;

5. the invention is convenient to use, the crank can be directly selected to finish the training process when the resistance is adjusted within a certain range, the balancing weight is not required to be increased or decreased, meanwhile, the stability after the running mode is switched is ensured through the self-locking property of the worm gear and the worm, and in addition, the crank is also fixed in an auxiliary way through a magnet;

5. the auxiliary braking component can be linked through the advancing and stopping of the athlete, so that the weight box can be stopped in time and cannot collide with the athlete;

6. the invention is completed completely through a mechanical structure, has more stable structure, is more durable compared with electronic products, and is more suitable for the practical environment of track and field training.

Drawings

FIG. 1 is a front view of the present invention;

FIG. 2 is a schematic perspective view of the present invention;

FIG. 3 is a schematic perspective view of the runway removed according to the present invention;

FIG. 4 is a schematic view of the internal perspective structure of the weight box of the present invention;

FIG. 5 is an enlarged schematic view of area A of FIG. 4;

FIG. 6 is a schematic perspective view of an auxiliary brake component according to the present invention;

FIG. 7 is a schematic perspective view of a weight box according to the present invention;

FIG. 8 is a schematic perspective view of a conversion mechanism according to the present invention;

fig. 9 is an enlarged schematic view of the region a of fig. 8.

Wherein, the reference numerals are as follows: 1. a runway; 2. a track; 3. a weight box; 301. a fixing plate; 302. placing a box; 303. a cover plate; 4. a pull rod; 401. a fixed rod; 402. a third threaded rod; 5. a tension belt; 501. a hook; 6. a sliding plate; 601. a first chute; 602. a second chute; 603. a third chute; 7. a first damping roller; 8. a second damping roller; 9. a conversion mechanism; 901. a lifting assembly; 9011. a first threaded rod; 9012. a first threaded sleeve; 9013. a first mounting plate; 9014. a support plate; 9015. a fourth chute; 9016. a first worm wheel; 9017. a first worm; 9018. a second worm wheel; 9019. a second worm; 9020. a crank; 9021. a second mounting plate; 9022. a fixed magnet; 903. a linkage assembly; 9031. a second threaded rod; 9032. a second threaded sleeve; 9033. a third mounting plate; 9034. a third worm wheel; 9035. a third worm; 9036. a fourth mounting plate; 9037. a first gear; 9038. a second gear; 9039. a rotating rod; 9040. a third gear; 9041. a rack; 10. an auxiliary braking member; 1001. a mounting box; 1002. a lifting plate; 1003. a spring; 1004. a column; 1005. a brake plate; 1006. a brake block; 1007. a jack; 1008. a fixing hole; 1009. a fixing bolt; 11. a first wheel frame; 12. a second wheel frame; 1201. a slide bar; 13. a traction rope; 1301. and a connecting ring.

Detailed Description

In order to clearly illustrate the technical characteristics of the scheme, the scheme is explained below through a specific embodiment.

Referring to fig. 1 to 9, the invention relates to a physical training auxiliary device for a field athlete, which comprises rails 2 symmetrically arranged along two sides of a runway 1 and positioned below the ground, wherein a weight box 3 is matched above the rails 2, the weight box 3 is fixedly connected with a pull rod 4, the pull rod 4 is matched with a tension belt 5, sliding plates 6, first damping rollers 7 and second damping rollers 8 are symmetrically arranged at positions, corresponding to the rails 2, of two sides of the weight box 3, the sliding plates 6 are respectively matched with the rails 2 through a switching mechanism 9, and the tension belt 5 is connected with an auxiliary braking component 10. The top of the weight box 3 is movably fitted with a cover plate 303.

The weight box 3 is rectangular structure, weight box 3 bottom both sides are provided with logical long and track 2 sliding fit's sliding plate 6, the both sides of every sliding plate 6 are by last first spout 601 of running through weight box 3 bottom of having seted up down, all be provided with a first damping gyro wheel 7 in every first spout 601, be located between two first spouts 601 on the same sliding plate 6 by last second spout 602 of running through weight box 3 bottom of having seted up down, all sliding connection has first wheel carrier 11 in every second spout 602, every first wheel carrier 11 bottom all is provided with a plurality of second damping gyro wheel 8 along track 2 direction. A plurality of placing boxes 302 matched with the balancing weights are arranged in the balancing weight box 3. Third sliding grooves 603 are symmetrically arranged on two sides of the inner wall of the first sliding groove 601, the third sliding grooves 603 are in sliding connection with sliding strips 1201 on two sides of a second wheel frame 12, the second wheel frame 12 is connected with a first damping roller 7, a conversion mechanism 9 comprises a lifting assembly 901 fixedly connected with the second wheel frame 12, the lifting assembly 901 comprises a first threaded rod 9011 fixedly connected with the center of the top of the second wheel frame 12 and vertically upwards arranged, a first thread bush 9012 is connected with the outer side thread of the upper part of the first threaded rod 9011, the top of the first thread bush 9012 is rotationally connected with the bottom of a first mounting plate 9013, the bottom of the first thread bush 9012 is rotationally connected with the top of a second mounting plate 9021, support plates 9014 vertically downwards arranged are fixedly and symmetrically connected with the bottoms of the two sides of the second mounting plate 9021, the bottoms of the support plates 9014 are fixedly connected with the inner wall of the bottom of a weight box 3, the second mounting plate 9021 is provided with a first through hole matched with the first threaded rod 9011, the inner sides of the two support plates 9014 are provided with fourth sliding grooves 9015 communicated with the third sliding grooves 603, the outer sides of the first threaded sleeves 9012 are coaxially sleeved with first worm gears 9016, two first worm gears 9016 located on the same side are respectively meshed with two sides of a first worm gear 9017, the central parts of the two first worm gears 9017 are coaxially sleeved with second worm gears 9018, the two second worm gears 9018 are respectively meshed with two sides of a second worm gear 9019, one end of the second worm gear 9019 is coaxially and fixedly connected with a crank 9020 extending to the outer side of the weight box 3, two ends of the first worm gear 9017 and two ends of the second worm gear 9019 are rotatably connected to the inner wall of the weight box 3, and the lifting assembly 901 is connected with the sliding plate 6 through a linkage assembly 903. The linkage assembly 903 comprises a second threaded rod 9031 which is fixedly connected to the tops of two sides of each sliding plate 6 and is vertically upwards arranged, a second threaded sleeve 9032 is connected to the outer side of the upper portion of each second threaded rod 9031 in a threaded mode, the bottom of each second threaded sleeve 9032 is rotatably connected to the inner wall of the bottom of the weight box 3, the top of each second threaded sleeve 9032 is rotatably connected to the bottom of each third mounting plate 9033, a second through hole matched with the second threaded rod 9031 is formed in the bottom of the weight box 3, a third worm gear 9034 is coaxially sleeved on the outer side of each second threaded sleeve 9032, each third worm gear 9034 is meshed with one third worm 9035, two ends of each third worm 9035 are rotatably connected to the inner wall of the weight box 3 and the fourth mounting plates 9036 respectively, a first gear 9037 is coaxially sleeved on the outer side of each third worm 9035, a first gear 9037 is meshed with a second gear 9038, the two ends of each second gear 9038 are coaxially sleeved on the outer side of each rotating rod 9039, a third gear 9040 is coaxially sleeved on the inner wall of the weight box 3 and the fourth mounting plates 9036, and each third gear 9040 is movably matched with one third rack 9041.

The equal fixedly connected with fixed plate 301 of four bight outer walls of weight box 3, pull rod 4 includes vertical fixed connection in fixed plate 301 top's dead lever 401, the inboard threaded connection of dead lever 401 has third threaded rod 402, the dead lever 401 is provided with the perforation that runs through with the inboard central part of third threaded rod 402 is coaxial, wear to be equipped with haulage rope 13 in the perforation, haulage rope 13 top is located the outside of dead lever 401 top and fixedly connected with go-between 1301, haulage rope 13 bottom is connected with auxiliary brake part 10, two go-between 1301 that are located the homonymy are with the couple 501 link cooperation that the tensile area 5 both ends set up. The weight box 3 is made of metal, and a U-shaped fixed magnet 9022 matched with the crank 9020 is arranged on the outer wall of the weight box 3. The auxiliary braking component 10 comprises a mounting box 1001 fixedly connected to the lower part of each fixing plate 301, lifting plates 1002 are vertically and slidably connected to the inner side of each mounting box 1001, the bottom ends of traction ropes 13 penetrate through the fixing plates 301 and the tops of the mounting boxes 1001 and are fixedly connected with the tops of the lifting plates 1002, springs 1003 are sleeved on the outer sides of traction ropes 13 positioned on the inner side of the mounting boxes 1001, two ends of each spring 1003 are fixedly connected to the inner wall of the top of each mounting box 1001 and the tops of the lifting plates 1002 respectively, upright columns 1004 which are vertically and downwards arranged are fixedly connected to the center of the bottom of each lifting plate 1002, the upright columns 1004 penetrate through the bottoms of the mounting boxes 1001 and are fixedly connected to the center of the tops of the horizontally arranged braking plates 1005, a plurality of braking blocks 1006 are uniformly arranged on the ground, through insertion holes 1007 are formed in positions, close to the tops, of the upright columns 1004 along the radial directions, corresponding insertion holes 1007 are formed in two sides of the mounting boxes 1001, and fixing bolts 1009 are inserted between the insertion holes 1007 and the corresponding fixing holes 1008.

The invention is practically used: firstly, according to the body height condition of a training athlete and the advancing direction of the athlete, a pull rod 4 on one side is selected and the height of the pull rod is adjusted, a fixing bolt 1009 on the side is pulled out, a brake plate 1005 is attached to a runway 1 under the action of a spring 1003, two ends of a tension belt 5 are connected with a connecting ring 1301 on a traction rope 13 through a hook 501, the athlete sleeves the tension rope 13 at a waist position, the weight box 3 can be driven to advance along the runway 1 to perform resistance training, when the athlete advances, the tension belt 5 pulls the traction rope 13 to drive the brake plate 1005 to lift off the runway 1, and when the athlete stops advancing, the weight box 3 can stop moving as soon as possible under the action of friction force or damping force no matter whether the slide plate 6 slides with the track 2 or the first damping roller 7 or the second damping roller 8 is acted, the weight box is not bumped due to inertia, and simultaneously when the weight box stops due to the action of inertia, the small distance of forward movement of the inertia of the athlete, the traction rope can retract under the action of the spring 1003 at the moment, and the brake plate 1005 is pushed to the runway 1 at the same time, so that the whole weight box 3 is braked further.

The force required by different athletes for resistance training in different training periods is different, even if the requirements of different time points of the same training on the resistance are different, when the resistance provided by the weight box 3 is adjusted, firstly, the weights with different weights are placed in the placement box 302 according to the requirements, then, the sliding plate 6 or the first damping roller 7 or the second damping roller 8 which act on the track 1 are adjusted through the crank 9020, and the different resistances are provided by the adjustment of the advancing mode and the increase and decrease combination of the weights, wherein the adjustment process of the advancing mode is as follows: the initial state is that the first damping roller 7 is located at the lowest position, the second damping roller 8 is located above the first damping roller 7 and below the second chute 602, the crank 9020 is firstly rocked to rotate the second worm 9019, the second worm 9019 drives the second worm gear 9018 to rotate, the second worm gear 9018 drives the first worm 9017 to rotate, the first worm 9017 drives the first worm gear 9016 to rotate, the first worm gear 9016 drives the first thread bush 9012 to rotate, the first thread bush 9012 drives the first screw 9011 to lift the first damping roller 7 to the inner side of the first chute 601 to stop, at the moment, the second damping roller 8 is in contact with the bottom of the track 2 and made into a weight box 3, the crank 9020 is continuously rotated in the original direction, the rack 9041 is meshed with the third gear 9040 and drives the third gear 9040 to rotate, the second gear 9038 drives the first gear 9037 meshed with the second worm gear 9017 to rotate, the first gear 9037 drives the third worm gear 9035 to rotate, the third worm gear 9035 drives the third worm gear 9035 to rotate, the third worm gear 9034 drives the third worm gear 9034 to rotate, the third worm gear wheel gear 9034 and the third gear 9035 drives the third worm gear 9038 to slide along with the third worm gear frame 2 to rotate until the third gear frame 2 is contacted with the bottom of the track 2 and the second wheel frame 11 is made into a weight box 3, and the weight plate is continuously lifted, and the third gear 9020 can be continuously rotated, the third gear 9040 is continuously rotated along with the first gear lifting plate is driven, and the third gear lifting plate is driven.

The foregoing description of the preferred embodiments of the invention is not intended to limit the invention to the precise form disclosed, and any such modifications, equivalents, and alternatives falling within the spirit and scope of the invention are intended to be included within the scope of the invention.

Claims (7)

1. The utility model provides a physical training auxiliary device for track athletes, which is characterized in that the physical training auxiliary device comprises tracks (2) which are symmetrically arranged along the two sides of a runway (1) and are positioned below the ground, a weight box (3) is matched above the tracks (2), a pull rod (4) is fixedly connected with the weight box (3), and a pull belt (5) is matched with the pull rod (4);

the two sides of the weight box (3) are symmetrically provided with a sliding plate (6), a first damping roller (7) and a second damping roller (8) corresponding to the positions of the rails (2), and the sliding plate (6) is matched with the first damping roller (7) and the second damping roller (8) through a switching mechanism (9) respectively;

the tension belt (5) is connected with an auxiliary braking component (10);

the weight box (3) is of a rectangular structure, two sides of the bottom of the weight box (3) are provided with sliding plates (6) which are in sliding fit with the rails (2) and have the same length, two sides of each sliding plate (6) are provided with first sliding grooves (601) penetrating through the bottom of the weight box (3) from bottom to top, and each first sliding groove (601) is internally provided with a first damping roller (7);

a second chute (602) penetrating through the bottom of the weight box (3) is formed between two first chutes (601) on the same sliding plate (6) from bottom to top, a first wheel frame (11) is connected in each second chute (602) in a sliding manner, and a plurality of second damping rollers (8) are arranged at the bottom of each first wheel frame (11) along the direction of the track (2);

third sliding grooves (603) are symmetrically formed in two sides of the inner wall of the first sliding groove (601), the third sliding grooves (603) are in sliding connection with sliding strips (1201) on two sides of a second wheel frame (12), and the second wheel frame (12) is connected with the first damping idler wheels (7);

the conversion mechanism (9) comprises a lifting assembly (901) fixedly connected with the second wheel frame (12);

the lifting assembly (901) comprises a first threaded rod (9011) fixedly connected with the center of the top of the second wheel frame (12) and vertically arranged upwards, a first threaded sleeve (9012) is connected to the outer side of the upper portion of the first threaded rod (9011) in a threaded mode, the top of the first threaded sleeve (9012) is rotationally connected to the bottom of the first mounting plate (9013), the bottom of the first threaded sleeve (9012) is rotationally connected to the top of the second mounting plate (9021), supporting plates (9014) which are vertically arranged downwards are fixedly and symmetrically connected to the bottoms of the two sides of the second mounting plate (9021), the bottoms of the supporting plates (9014) are fixedly connected with the inner wall of the bottom of the weight box (3), first through holes matched with the first threaded rod (9011) are formed in the second mounting plate (9021), and fourth sliding grooves (9015) which are communicated with the third sliding grooves (603) are formed in the inner sides of the two supporting plates (9014).

The outer sides of the first thread sleeves (9012) are coaxially sleeved with first worm gears (9016), the two first worm gears (9016) positioned on the same side are respectively meshed with two sides of a first worm (9017), the central parts of the two first worm gears (9017) are coaxially sleeved with second worm gears (9018), the two second worm gears (9018) are respectively meshed with two sides of a second worm (9019), and one end of the second worm (9019) is coaxially and fixedly connected with a crank (9020) extending to the outer side of the weight box (3);

both ends of the first worm (9017) and the second worm (9019) are rotatably connected to the inner wall of the weight box (3);

the lifting assembly (901) is connected with the sliding plate (6) through a linkage assembly (903).

2. The physical training auxiliary device for athletes according to claim 1, wherein the linkage assembly (903) comprises a second threaded rod (9031) fixedly connected to the tops of two sides of each sliding plate (6) and vertically arranged upwards, a second threaded sleeve (9032) is connected to the outer side of the upper part of each second threaded rod (9031) in a threaded manner, the bottom of the second threaded sleeve (9032) is rotatably connected to the inner wall of the bottom of the weight box (3), the top of the second threaded sleeve (9032) is rotatably connected to the bottom of a third mounting plate (9033), and a second through hole matched with the second threaded rod (9031) is formed in the bottom of the weight box (3);

every second thread bush (9032) outside has all coaxially cup jointed third worm wheel (9034), every third worm wheel (9034) all with a third worm (9035) meshing, on both ends of third worm (9035) rotate respectively connect in weight box (3) inner wall and fourth mounting panel (9036), first gear (9037) has been cup jointed coaxially in third worm (9035) outside, first gear (9037) meshes with second gear (9038), second gear (9038) cup joints coaxially in bull stick (9039) outside, bull stick (9039) both ends rotate respectively connect in weight box (3) inner wall with on fourth mounting panel (9036), bull stick (9039) outside has coaxially cup jointed third gear (9040);

a rack (9041) is vertically arranged on the outer wall of one side of each second wheel frame (12), and the rack (9041) is in movable fit with the third gear (9040).

3. The physical training auxiliary device for track and field athletes according to claim 1, wherein the outer walls of four corners of the weight box (3) are fixedly connected with a fixing plate (301), the pull rod (4) comprises a fixing rod (401) vertically and fixedly connected to the top of the fixing plate (301), a third threaded rod (402) is connected to the inner side of the fixing rod (401) in a threaded manner, a penetrating through hole is coaxially formed in the center of the inner side of the fixing rod (401) and the center of the inner side of the third threaded rod (402), a traction rope (13) is penetrated in the penetrating hole, the top end of the traction rope (13) is positioned on the outer side of the top of the fixing rod (401) and fixedly connected with a connecting ring (1301), and the bottom end of the traction rope (13) is connected with the auxiliary braking component (10);

the two connecting rings (1301) positioned on the same side are in hanging fit with hooks (501) arranged at two ends of the tension belt (5).

4. The physical training auxiliary device for track and field athletes according to claim 3, wherein the auxiliary braking component (10) comprises a mounting box (1001) fixedly connected below each fixing plate (301), a lifting plate (1002) is vertically and slidingly connected to the inner side of each mounting box (1001), the bottom end of the traction rope (13) passes through the fixing plate (301) and the top of the mounting box (1001) and is fixedly connected with the top of the lifting plate (1002), a spring (1003) is sleeved on the outer side of the traction rope (13) positioned on the inner side part of the mounting box (1001), and two ends of the spring (1003) are fixedly connected to the inner wall of the top of the mounting box (1001) and the top of the lifting plate (1002) respectively;

the center of the bottom of each lifting plate (1002) is fixedly connected with an upright post (1004) which is vertically downwards arranged, the upright posts (1004) penetrate through the bottom of the installation box (1001) and are fixedly connected with the center of the top of a horizontally arranged brake plate (1005), and a plurality of brake blocks (1006) are uniformly arranged on the ground of the brake plate (1005);

the upright post (1004) is close to the top and is provided with a through jack (1007) along the radial direction, fixing holes (1008) are formed in the two sides of the mounting box (1001) corresponding to the jack (1007), and fixing bolts (1009) are inserted between the jack (1007) and the corresponding fixing holes (1008).

5. The physical training auxiliary device for track and field athletes according to claim 2, wherein the weight box (3) is made of metal, and a U-shaped fixed magnet (9022) matched with the crank (9020) is arranged on the outer wall of the weight box (3).

6. The physical training aid for athletes in fields according to claim 1, wherein a plurality of placement boxes (302) matched with balancing weights are arranged in the balancing weight box (3).

7. The physical training aid for athletes in accordance with claim 1, wherein the top of the weight box (3) is movably fitted with a cover plate (303).