CN117771619B

CN117771619B - Passive shoulder pushing and lifting body-building device

Info

Publication number: CN117771619B
Application number: CN202410217627.6A
Authority: CN
Inventors: 赵之富; 杨鹏泽; 李永成; 刘建新; 时颖然; 李国辉; 刘涛; 李永健; 王维; 乔凯
Original assignee: Shandong Baodelong Medical Rehabilitation Equipment Co ltd
Current assignee: Shandong Baodelong Medical Rehabilitation Equipment Co ltd
Priority date: 2024-02-28
Filing date: 2024-02-28
Publication date: 2024-05-17
Anticipated expiration: 2044-02-28
Also published as: CN117771619A

Abstract

The invention relates to the technical field of passive training body-building devices, and discloses a passive shoulder-pushing body-building device. Including the bottom plate, the bottom plate rigid coupling has symmetrical supporting box, sliding connection has the slip post in the supporting box, the slip post is kept away from the one end rigid coupling of bottom plate has the fixed column, and the symmetry the common rigid coupling of fixed column has the connecting block, the symmetry the equal swivelling joint of opposite side of fixed column has the swinging arms, the connecting block is kept away from one side of bottom plate is provided with symmetrical spout, the symmetry first sliding block rigid coupling has first connecting rope jointly, the symmetry the supporting box is kept away from one side rigid coupling of handle has the support frame, the support frame rigid coupling have with the electric reel that the controller electricity is connected, electric reel with the rigid coupling has the stay cord between the first connecting rope. The invention utilizes the electric scroll and the connecting block to drive the large arm and the small arm of the user to move, thereby carrying out automatic stretching training on the shoulder.

Description

Passive shoulder pushing and lifting body-building device

Technical Field

The invention relates to the technical field of passive training body-building devices, and discloses a passive shoulder-pushing body-building device.

Background

Because people use computers for a long time to work, most people can suffer from cervical spondylosis, scapulohumeral periarthritis and other problems caused by sedentary sitting, when the problems are serious, operation treatment is needed, after the patients undergo operation treatment, a series of rehabilitation exercises are needed to be performed on the shoulders and arms, the shoulders are the parts with more human body movement ranges and movement angles, when the patients move for a long time, the muscle stiffness of the shoulders is caused, even the symptoms of muscle atrophy appear, and the rehabilitation time of the patients is seriously influenced.

The prior art generally trains under the help of families or doctors when carrying out tensile training on shoulders, the families and the doctors cannot be at the patient for a long time, so that the training effect of the patient is poor, the patients are helped to train for a long time, the families or the doctors feel tired, the training effect cannot be guaranteed, the families or the doctors cannot ensure that the moving ranges of each time are the same when helping the patients to train, and if the moving ranges are too large, secondary damage to shoulder tissues of the patient is possible.

Disclosure of Invention

In order to overcome the disadvantages mentioned in the background art, the present invention provides a passive shoulder-lifting exercise machine.

The technical proposal is as follows: the utility model provides a passive shoulder pushes away and lifts fitness equipment, includes the bottom plate, the bottom plate rigid coupling has the controller, the bottom plate is kept away from one side rigid coupling of controller has symmetrical supporting box, sliding connection has the sliding column in the supporting box, the sliding column is kept away from the one end rigid coupling of bottom plate has the fixed column, the symmetry the common rigid coupling of fixed column has the connecting block, the symmetry the equal swivelling joint in opposite sides of fixed column has the swing frame, the symmetry the opposite sides of swing frame all rigid coupling has the handle, the connecting block is kept away from one side of bottom plate is provided with symmetrical spout, the rigid coupling has first dead lever in the spout of connecting block, sliding connection has first sliding block in the spout of connecting block, first dead lever runs through adjacent first sliding block, first sliding block with adjacent first dead lever sliding connection, first sliding block with the symmetry have first elastic component between the connecting block the rigid coupling together the first sliding block has first connecting rope, the symmetry one side of keeping away from the supporting box has the handle, the support frame has the electric supporting frame with between the reel is connected with the safety protection mechanism.

Further, safety protection mechanism is including the first gag lever post of symmetry, the connecting block is kept away from one side of handle is provided with the spout of symmetry, two adjacent spouts intercommunication each other on the connecting block, the symmetry first gag lever post respectively sliding connection in the adjacent spout of one side of handle is kept away from to the connecting block, first gag lever post and adjacent first sliding block rigid coupling, the support frame is close to one side rigid coupling of handle has the stopper of symmetry, the middle part of stopper be provided with adjacent first gag lever post spacing complex through-hole, first gag lever post is located the adjacency the through-hole of stopper, the connecting block is close to one side rigid coupling of bottom plate has the first telescopic link of symmetry, the telescopic end of first telescopic link passes through the mounting panel and adjacency first gag lever post rigid coupling, the sliding column is kept away from one side of connecting block is provided with the T-shaped groove, rigid coupling and intercommunication have first oil pipe between the first telescopic link, T-shaped groove lower part slides and sealing connection has the stopper of symmetry, the middle part of stopper is provided with adjacent groove and adjacent groove limit post, the equal spacing between the adjacent groove has the first oil pipe of limit post and the equal fixed limit post.

Further, the elasticity of the first elastic piece is larger than that of the second elastic piece, the limiting column is fixedly connected with a protruding block, and the protruding block on the limiting column is matched with the adjacent sliding column and used for limiting the moving distance of the limiting column.

Further, the device comprises a limit protection mechanism, the limit protection mechanism is arranged on the symmetrical fixed columns, the limit protection mechanism is used for limiting the upward moving distance of the arms, the limit protection mechanism comprises symmetrical rotating discs, the symmetrical rotating discs are respectively and rotatably connected to the adjacent fixed columns, torsion springs are fixedly connected between the rotating discs and the adjacent sliding columns, a second limit rod which is in limit fit with the adjacent swinging frames is fixedly connected on one side of each rotating disc, which is close to each handle, a groove which is distributed at equal intervals is formed on one side of each rotating disc, a first spline rod is connected on one side of each sliding column through a mounting seat spline, a limit plate which is in limit fit with the corresponding groove on each rotating disc is fixedly connected on one end of each first spline rod, a mounting plate is fixedly connected on the other end of each first spline rod, a third elastic piece is fixedly connected between the mounting plate of each first spline rod and the adjacent mounting seat of each sliding column, and an adjusting assembly for controlling the first spline rods is arranged on each handle.

Further, the adjusting component comprises a second telescopic rod, the second telescopic rod is fixedly connected to the mounting seat of the sliding column, the telescopic end of the second telescopic rod is fixedly connected to the mounting plate on the first spline rod, the handle is provided with an oil storage cavity, a piston rod is slidably connected in the oil storage cavity, a second oil guide pipe is fixedly connected and communicated between the oil storage cavity and the second telescopic rod, and hydraulic oil is filled in the oil storage cavity and the second oil guide pipe.

Further, the swinging frame is further provided with a counterweight adjusting mechanism, the counterweight adjusting mechanism is arranged on the swinging frame symmetrically, the counterweight adjusting mechanism is used for adjusting the load of the swinging frame during swinging, the counterweight adjusting mechanism comprises symmetrical transmission rods, the symmetrical transmission rods are fixedly connected to the adjacent swinging frames respectively, the central axes of the transmission rods are coincident with the central axes of the adjacent fixed columns, the opposite sides of the swinging frames are respectively provided with a sliding groove, a second sliding block is connected in the sliding grooves of the swinging frames in a sliding manner, the second sliding block is fixedly connected with a balancing weight, the balancing weight is provided with a groove, the transmission rods are located adjacent to the groove of the balancing weight, a fourth elastic piece is fixedly connected between the second sliding block and the adjacent swinging frame, one side of the swinging frame away from the fixed columns is provided with a limiting component, and the limiting component is used for changing the position of the second sliding block.

Further, the balancing weight is arranged to be round, the circle center of the balancing weight is located adjacent to the central axis of the transmission rod, the balancing weight is provided with a pit for balancing gravity, and the gravity center of the balancing weight is located adjacent to the central axis of the transmission rod.

Further, the spacing subassembly is including first wind-up roll, first wind-up roll rotates to be connected in the adjacent the swing frame, first wind-up roll with be adjacent the rigid coupling has the second to connect the rope between the second sliding block, the swing frame is kept away from one side spline connection of fixed column has the second spline pole, the one end of second spline pole has the third gag lever post through the mount pad rigid coupling, the third gag lever post with adjacent swing frame sliding fit, one side that the first wind-up roll kept away from adjacent the handle is provided with equidistant recess in circumference, the third gag lever post with adjacent the spacing cooperation of recess of first wind-up roll, the other end rigid coupling of second spline pole has the locating plate, the locating plate of second spline pole with adjacent rigid coupling has the fifth elastic component between the swing frame.

Further, the automatic weighing device comprises a loading mechanism, the loading mechanism is arranged on one side, far away from the controller, of the bottom plate, the loading mechanism is used for increasing upward swinging resistance of the swinging frame, the loading mechanism comprises symmetrical second winding rollers, the symmetrical second winding rollers are fixedly connected to adjacent transmission rods respectively, guide frames are fixedly connected to two sides of the bottom plate, load blocks are orderly stacked in the guide frames, connecting pins are connected between the stacked load blocks in a sliding manner, the connecting pins are in limiting fit with the adjacent load blocks through pins, third connecting ropes are fixedly connected between the connecting pins and the adjacent second winding rollers, and anti-falling assemblies are arranged on the sliding columns and used for limiting the adjacent transmission rods.

Further, the anti-falling assembly comprises a fixed disc, the fixed disc is fixedly connected to the adjacent transmission rod, the fixed disc is provided with circumferentially equidistant blind holes, sixth elastic pieces are fixedly connected in the blind holes of the fixed disc, sliding rods fixedly connected with the adjacent sixth elastic pieces are connected in the blind holes of the fixed disc in a sliding manner, fixing rings are fixedly connected to the sliding columns through mounting frames, central axes of the fixing rings coincide with central line axes of the adjacent fixed disc, circumferentially equidistant second fixing rods are fixedly connected to the fixing rings, and the second fixing rods are in limiting fit with the adjacent sliding rods.

The beneficial effects are as follows: 1. according to the invention, the electric scroll and the connecting block are utilized to drive the large arm and the small arm of the user to move, so that automatic stretching training is performed on the shoulder, and meanwhile, the limiting state between the limiting column and the adjacent fixed plate is controlled by utilizing the moving state of the connecting block, so that the downward movement of the connecting block after the tensile force of the connecting block is lost is ensured, and the condition that the arm of the user is driven to rapidly move downward after the acting force of the connecting block is lost, and the arm and the shoulder of the user are injured is avoided.

2. The invention limits the arm extension height of the user by utilizing the rotation angle of the automatic adjusting rotating disc, and avoids the excessive stretching injury of musculature such as arms, shoulders and the like of the user caused by the overlarge amplitude of the user pushing the swinging frame upwards.

3. According to the invention, the load weight of the swinging frame is increased through the load block, and the position of the balancing weight is utilized to precisely adjust the load weight of the swinging frame, so that the load of the swinging frame is just suitable for users.

4. According to the invention, the sliding rod is limited by the second fixing rod, so that the fixing disc and the adjacent transmission rod stop rotating, the swinging frame stops swinging downwards, and the phenomenon that the arms of a user are injured due to rapid descending of the swinging frame after the arms of the user lose force is prevented.

Drawings

FIG. 1 is a schematic perspective view of the present invention;

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

FIG. 3 is a schematic rear perspective view of the present invention;

FIG. 4 is a cross-sectional view of the connection block of the present invention;

FIG. 5 is a rear view of the first stop lever and first telescoping lever of the present invention;

FIG. 6 is a cross-sectional view of the support box and slide column of the present invention;

FIG. 7 is a side view of the rotating disc and second stop lever of the present invention;

FIG. 8 is a rear view of the rotatable disk and first spline lever of the present invention;

FIG. 9 is a vertical cross-sectional view of the grip of the present invention;

FIG. 10 is a cross-sectional view of a swing frame of the present invention;

FIG. 11 is a schematic perspective view of the first wind-up roll and the second spline rod of the present invention;

FIG. 12 is a schematic perspective view of a second wind-up roll and a retaining ring according to the present invention;

FIG. 13 is a cross-sectional view of a retaining disk and retaining ring of the present invention;

fig. 14 is a side view of the guide frame and load block of the present invention.

Reference numerals: the device comprises a base plate, a 101-controller, a 2-supporting box, a 3-sliding column, a 4-fixed column, a 5-connecting block, a 6-swinging frame, a 7-handle, a 8-first fixing rod, a 9-first elastic piece, a 10-first sliding block, a 11-first connecting rope, a 12-supporting frame, a 13-electric reel, a 14-first limit rod, a 15-limit block, a 16-first telescopic rod, a 17-T-shaped groove, a 18-first oil guide pipe, a 19-limit column, a 20-second elastic piece, a 21-fixed plate, a 22-rotating disc, a 23-torsion spring, a 24-second limit rod, a 25-first spline rod, a 26-third elastic piece, a 27-second telescopic rod, a 28-oil storage cavity, a 29-piston rod, a 30-second oil guide pipe, a 31-transmission rod, a 32-second sliding block, a 33-balancing weight, a 34-fourth elastic piece, a 35-first winding roller, a 36-second connecting rope, a 37-second spline rod, a 38-third limit rod, a 39-fifth elastic piece, a 40-second spline rod, a 45-sixth elastic piece, a guide pin, a 45-fourth elastic piece, a guide rod, a 45-sixth elastic piece, a 45-fourth elastic piece, a guide pin, a 45-fourth elastic piece, a 46-third elastic piece, a guide rod, a guide frame, a 45-third elastic piece, a guide pin, a 46-third elastic piece, and a fixed pin.

Detailed Description

The invention will be described in further detail with reference to the drawings and the detailed description. The embodiments of the invention have been presented for purposes of illustration and description, and are not intended to be exhaustive or limited to the invention in the form disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, and to enable others of ordinary skill in the art to understand the invention for various embodiments with various modifications as are suited to the particular use contemplated.

Example 1: the passive shoulder-pushing body-building device comprises a bottom plate 1, wherein the bottom plate 1 is fixedly connected with a controller 101, the controller 101 comprises a control panel and a bracket, the upper side of the bottom plate 1 is fixedly connected with a supporting chair capable of adjusting the height, the rear side of the bottom plate 1 is fixedly connected with two symmetrical supporting boxes 2, sliding columns 3 are slidably connected in the supporting boxes 2, the lower ends of the sliding columns 3 are in extrusion contact with the adjacent supporting boxes 2, the upper ends of the sliding columns 3 are fixedly connected with fixed columns 4, the two fixed columns 4 are fixedly connected with connecting blocks 5 together, the opposite sides of the two fixed columns 4 are respectively and rotatably connected with a swinging frame 6, a limit bracket is arranged between the swinging frame 6 and the adjacent sliding columns 3, the swinging frame 6 is kept in a horizontal state in the initial stage, the opposite sides of the two swinging frames 6 are respectively and fixedly connected with a handle 7, the outer sides of the handle 7 are wrapped with anti-skidding sleeves for improving the comfort of users in the use process, the upper side of the connecting block 5 is provided with two symmetrical sliding grooves, a first fixing rod 8 is fixedly connected in the sliding groove of the connecting block 5, a first sliding block 10 is connected in the sliding groove of the connecting block 5 in a sliding way, the first fixing rod 8 penetrates through the adjacent first sliding block 10 and is connected with the same in a sliding way, a first elastic piece 9 is fixedly connected between the first sliding block 10 and the connecting block 5, the first elastic piece 9 is wound on the outer surface of the adjacent first fixing rod 8, the two first sliding blocks 10 are fixedly connected with a first connecting rope 11 together, the first connecting rope 11 is connected with the first sliding block 10 through a hanging ring, the rear sides of the two supporting boxes 2 are fixedly connected with a supporting frame 12, the supporting frame 12 is fixedly connected with an electric scroll 13 which is electrically connected with a controller 101, the electric scroll 13 is an existing electric device, the specific structure of the electric scroll 13 is not shown in the drawing, a pull rope is fixedly connected between the electric scroll 13 and the first connecting rope 11, the electric reel 13 tightens the first connecting rope 11 by winding the pull rope thereon and moves the two first sliding blocks 10 close to each other, and a safety protection mechanism is arranged between the supporting box 2 and the adjacent sliding column 3 and used for limiting the connecting block 5.

As shown in fig. 5 and 6, the safety protection mechanism comprises two symmetrical first limit rods 14, two symmetrical sliding grooves are arranged at the rear side of the connecting block 5, the sliding grooves at the upper rear side of the connecting block 5 are communicated with the adjacent sliding grooves at the upper side of the connecting block, the two first limit rods 14 are respectively and slidably connected in the adjacent sliding grooves at the rear side of the connecting block 5, the first limit rods 14 are fixedly connected with the adjacent first slide blocks 10, in the process of mutual movement of the two first slide blocks 10, the first slide blocks 10 drive the first limit rods 14 fixedly connected with the first slide blocks 14 to synchronously move, two symmetrical limit blocks 15 are fixedly connected at the front side of the supporting frame 12, through holes in limit fit with the adjacent first limit rods 14 are arranged at the middle parts of the limit blocks 15, in the initial state, the first limit rods 14 are positioned in the round holes of the adjacent limit blocks 15 and are in limit fit with the adjacent first limit rods 14 by the limit blocks 15, the position of the connecting block 5 is fixed, two symmetrical first telescopic rods 16 are fixedly connected to the lower side of the connecting block 5, the telescopic ends of the first telescopic rods 16 are fixedly connected with adjacent first limiting rods 14 through mounting plates, in the process that the first limiting rods 14 move along with adjacent first sliding blocks 10, the first limiting rods 14 drive the telescopic ends of the adjacent first telescopic rods 16 to move, T-shaped grooves 17 are arranged on the lower side of the sliding columns 3, the T-shaped grooves 17 are fixedly connected with the first telescopic rods 16 on the same side and communicated with first oil guide pipes 18, two symmetrical limiting columns 19 are slidably and hermetically connected to the lower parts of the T-shaped grooves 17, the limiting columns 19 are in extrusion fit with the inner walls of the adjacent supporting boxes 2, the limiting columns 19 are in contact with the inner walls of the adjacent supporting boxes 2 in the initial state, hydraulic oil is filled in the T-shaped grooves 17 and the adjacent first oil guide pipes 18, second elastic pieces 20 are fixedly connected between the adjacent limiting columns 19, the second elastic piece 20 sets up to the spring, the inner wall rigid coupling of supporting box 2 has symmetrical and equidistant fixed plate 21 that distributes, fixed plate 21 sets up to the metal sheet, fixed plate 21 and adjacent spacing post 19 spacing cooperation, it is spacing to adjacent spacing post 19 through fixed plate 21, make spacing post 19 and adjacent slip post 3 stop down the removal, the elasticity of first elastic piece 9 is greater than the elasticity of second elastic piece 20, the rigid coupling of spacing post 19 has the lug, cooperate with slip post 3 through the lug on the spacing post 19, limit the distance that spacing post 19 moved along adjacent slip post 3.

The user sits on the support chair at first, the user adjusts the rotation speed and the number of turns of rotation of electric reel 13 through controller 101 according to self circumstances, and then distance and speed that connecting block 5 upwards moved are adjusted, then the user holds handle 7 with both hands respectively, controller 101 starts electric reel 13 afterwards, start the stay cord on it after the electric reel 13 starts, the stay cord on the electric reel 13 pulls first connecting rope 11 upwards, after the middle part of first connecting rope 11 received the pulling force, two first sliding block 10 are pulled respectively to the both ends of first connecting rope 11, two first sliding block 10 are close to each other after receiving the pulling force and move, two first elastic component 9 are compressed, until two first elastic component 9 are compressed completely, two first sliding block 10 stop sliding, then under the pulling force effect of first connecting rope 11, first connecting rope 11 drives connecting block 5 and part on it upwards move through two first sliding block 10.

In the process that the two first sliding blocks 10 move close to each other, the first sliding blocks 10 drive the first limiting rods 14 on the first sliding blocks to move synchronously, in an initial state, the first limiting rods 14 are located in through holes of the adjacent limiting blocks 15, the two first sliding blocks 10 respectively drive the first limiting rods 14 on the first sliding blocks to move close to each other, the first limiting rods 14 move out of the through holes of the adjacent limiting blocks 15, meanwhile, the first limiting rods 14 drive the telescopic ends of the adjacent first telescopic rods 16 to extend outwards through mounting plates, at the moment, the first telescopic rods 16 extract hydraulic oil in the T-shaped grooves 17 on the same side through the adjacent first oil guide pipes 18, the pressure of the hydraulic oil in the T-shaped grooves 17 is reduced, the adjacent two limiting columns 19 move close to each other, and the second elastic pieces 20 are compressed until the protruding blocks of the two limiting columns 19 are in contact with the adjacent sliding columns 3.

When the two first elastic pieces 9 are completely compressed, under the action of the pulling force of the first connecting rope 11, the connecting blocks 5 drive parts on the connecting blocks to move upwards, the sliding columns 3 move upwards along the adjacent supporting boxes 2, the electric reel 13 starts to roll the pull ropes according to the initial set speed, after the number of turns of the electric reel 13 reaches the set value, the connecting blocks 5 just reach the maximum height of the extension of arms of a user, in the process of moving the connecting blocks 5 upwards, the swinging frames 6 and parts on the connecting blocks are driven by the fixing columns 4 on the two sides to synchronously move upwards, at the moment, the large arms and the small arms of the user synchronously move upwards along with the swinging frames 6, in the process of moving the large arms and the small arms of the user upwards, the muscles and bones of the shoulders are stretched and trained, then the electric reel 13 starts to reversely rotate at the set speed, the connecting blocks 5 drive the parts on the connecting blocks to move downwards, after the connecting blocks 5 move downwards to the set height, the connecting blocks 5 reciprocate downwards under the drive of the electric reel 13 to the lowest position, and the connecting blocks 5 do not move to the initial position, and the first elastic pieces 9 are always kept in the complete compression state.

After training, the user loosens the handle 7, then control the electric reel 13 through the controller 101 and reset and close, when the electric reel 13 resets, the connecting block 5 drives two sliding columns 3 to move to the initial position, the electric reel 13 continues to rotate, at this moment, under the action of the elasticity of two first elastic pieces 9, two first sliding blocks 10 move away from each other and reset, the first limiting rod 14 is inserted into the through hole of the adjacent limiting block 15 again, under the limiting action of the first limiting rod 14 and the adjacent limiting block 15, fix the connecting block 5 again, in the resetting process of the first sliding blocks 10, the telescopic rods of two first telescopic rods 16 reset, hydraulic oil in the first telescopic rods 16 reflows to the T-shaped groove 17 on the same side again, at this moment, under the combined action of the elasticity of the second elastic pieces 20 and hydraulic oil, the adjacent two limiting columns 19 are away from each other, until the limiting columns 19 are contacted with the inner walls of the adjacent supporting boxes 2.

In the process of stretching training of shoulder muscles and bones by users, if the electric reel 13 is damaged in the process of training, or when a pull rope between the electric reel 13 and the first connecting rope 11 is damaged, when the situation occurs, the connecting block 5 can lose tension instantly, then under the elastic force of the two first elastic pieces 9, the two first sliding blocks 10 are reset, at the moment, the sliding column 3 is positioned at the middle position of the adjacent supporting box 2, when the two first sliding blocks 10 are reset, the two adjacent limiting columns 19 are far away from each other and move, the limiting columns 19 are inserted between the adjacent fixed plates 21, under the limiting action of the fixed plates 21 on the adjacent limiting columns 19, the sliding columns 3 stop moving downwards, under the supporting action of the two sliding columns 3, the connecting block 5 is stopped moving downwards, the arms of the users are driven to move downwards quickly, the injuries of the arms and shoulders of the users are caused, after the device is maintained, the arms of the users are required to be pulled upwards again through the electric reel 13, the limiting columns 19 are matched with the adjacent fixed plates 21, and then the arms of the electric reel 13 are controlled to be reset through the electric controller 101, and the parts of the connecting block are reset, and the connecting blocks are reset, and the parts of the connecting blocks are controlled to be reset.

Example 2: on the basis of the embodiment 1, as shown in fig. 7-9, the swing arm type swing frame further comprises a limit protection mechanism, the limit protection mechanism is arranged on the two fixed columns 4, the limit protection mechanism is used for limiting the upward moving distance of the arm, the limit protection mechanism comprises two symmetrical rotating discs 22, the two rotating discs 22 are respectively connected with the adjacent fixed columns 4 in a rotating way, a torsion spring 23 is fixedly connected between each rotating disc 22 and the adjacent sliding column 3, the torsion spring 23 is wound on the outer surface of the adjacent fixed column 4, the front side of each rotating disc 22 is fixedly connected with a second limit rod 24 in limit fit with the adjacent swing frame 6, when the swing frame 6 swings upwards, the swing frame 6 drives the adjacent rotating discs 22 to synchronously rotate through the adjacent second limit rods 24, the rear side of each rotating disc 22 is provided with equidistant grooves, the recess on the rolling disc 22 is trapezoidal, one side of sliding column 3 has first spline pole 25 through mount pad spline connection, the front end of first spline pole 25 fixedly connected with adjacent rolling disc 22 on recess spacing complex limiting plate, limiting plate on the first spline pole 25 sets up to trapezoidal, be convenient for with the recess complex on the homonymy rolling disc 22, the rear end fixedly connected with mounting panel of first spline pole 25, the rigid coupling has third elastic component 26 between the mounting panel of first spline pole 25 and the mount pad of adjacent sliding column 3, third elastic component 26 sets up to the spring, the outside of adjacent first spline pole 25 is located to third elastic component 26 cover, handle 7 is provided with the adjusting part that is used for controlling first spline pole 25.

As shown in fig. 8 and 9, the adjusting assembly comprises a second telescopic rod 27, the second telescopic rod 27 is fixedly connected to the mounting seat of the adjacent sliding column 3, the telescopic end of the second telescopic rod 27 is fixedly connected with the mounting plate on the adjacent first spline rod 25, the telescopic end of the second telescopic rod 27 drives the adjacent first spline rod 25 to move through the mounting plate, the grip 7 is provided with an oil storage cavity 28, a piston rod 29 is slidably connected in the oil storage cavity 28, the outer end of the piston rod 29 is provided with a semicircle ball, the semicircle ball is convenient for a user to press, a second oil guide pipe 30 is fixedly connected and communicated between the oil storage cavity 28 and the adjacent second telescopic rod 27, hydraulic oil is filled in each of the oil storage cavity 28 and the adjacent second oil guide pipe 30, and when the piston rod 29 is pressed, the piston rod 29 extrudes the hydraulic oil in the adjacent oil storage cavity 28, so that the hydraulic oil flows into the adjacent first spline rod 25 along the adjacent second oil guide pipe 30.

When a user wants to perform shoulder lifting training, the user holds the two grips 7 first, at this time, the limiting plate on the first spline rod 25 is in a limiting fit state with the grooves of the adjacent rotating discs 22, then the user presses the piston rods 29 on two sides, the piston rods 29 slide along the adjacent oil storage cavities 28, hydraulic oil in the oil storage cavities 28 flows into the second telescopic rods 27 on the same side along the adjacent second oil guide pipes 30, the telescopic ends of the second telescopic rods 27 extend outwards, the telescopic ends of the second telescopic rods 27 drive the adjacent first spline rods 25 to synchronously move through the mounting plates, the limiting plate on the first spline rods 25 is driven by the first spline rods 25 to be away from the grooves of the adjacent rotating discs 22, the third elastic piece 26 is compressed, the limiting plate on the first spline rods 25 is out of fit with the grooves of the adjacent rotating discs 22, then the user extends upwards when pressing the piston rods 29, the swinging frame 6 swings upwards along the adjacent fixed column 4, in the process of swinging upwards of the swinging frame 6, the swinging frame 6 drives the adjacent rotating disc 22 to synchronously rotate through the second limiting rod 24, the torsion spring 23 is screwed, a user adjusts the extension length of the arm according to the situation, after the maximum extension length of the arm is reached, the user releases the pressing of the piston rod 29, then under the elastic force of the third elastic piece 26, the first spline rod 25 drives the limiting block 15 thereon to reset, then the limiting plate of the first spline rod 25 is in limiting fit with the groove on the adjacent rotating disc 22 again, at the moment, the rotating disc 22 is fixed, then when the user drives the swinging frame 6 to swing downwards through the arm, the swinging frame 6 loses contact with the adjacent second limiting rod 24, at the moment, the fixed position of the second limiting rod 24 is the maximum distance of swinging upwards of the swinging frame 6, when the user pushes the handle 7 again, the swing frame 6 stops swinging after contacting with the adjacent second limiting rods 24, the swing frame 6 is prevented from swinging upwards, the excessive stretching of the arms of the user is further prevented, musculature such as the arms and shoulders of the user is prevented, the user can adjust the rotating angle of the rotating disc 22 at any time in the training process, the maximum swing amplitude of the swing frame 6 is further adjusted, after the user finishes training, after the swing frame 6 is restored to the initial state, the user presses the piston rod 29 again, then the limiting plates on the first spline rods 25 are separated from the grooves of the adjacent rotating discs 22 again, simultaneously under the torsion action of the torsion springs 23, the rotating discs 22 and the second limiting rods 24 on the rotating discs are reset, and after the user loosens the piston rods 29, the first spline rods 25 and the limiting plates on the first spline rods are reset again.

Example 3: on the basis of embodiment 2, as shown in fig. 10 and 11, the device further comprises a weight adjusting mechanism, the weight adjusting mechanism is arranged on the two swinging frames 6, the weight adjusting mechanism is used for adjusting the load when the swinging frames 6 swing, the weight adjusting mechanism comprises two symmetrical transmission rods 31, the two transmission rods 31 are fixedly connected to the adjacent swinging frames 6 respectively, the transmission rods 31 are positioned at the outer sides of the adjacent swinging frames 6, the central axes of the transmission rods 31 are coincident with the central axes of the adjacent fixed columns 4, when the swinging frames 6 swing along the adjacent fixed columns 4, the transmission rods 31 rotate along with the adjacent swinging frames 6, sliding grooves are arranged on the opposite sides of the two swinging frames 6, a second sliding block 32 is connected in the sliding grooves of the swinging frames 6 in a sliding way, a balancing weight 33 is fixedly connected to the second sliding block 32, the balancing weight 33 is provided with a groove, the distance between the balancing weight 33 and the adjacent transmission rods 31 is farther, the larger the force required when pushing up the swinging frame 6, the more the driving rod 31 is located in the groove of the adjacent balancing weight 33, the balancing weight 33 is circular, the center of the balancing weight 33 is located on the central axis of the adjacent driving rod 31, the balancing weight 33 is provided with a pit for balancing gravity, the distribution of the gravity of the balancing weight 33 is balanced by the pit on the balancing weight 33, the center of gravity of the balancing weight 33 is located on the central axis of the adjacent driving rod 31, when the balancing weight 33 is located at the initial position, the user does not need to overcome the gravity of the balancing weight 33 when pushing up the swinging frame 6, a fourth elastic piece 34 is fixedly connected between the second sliding block 32 and the adjacent swinging frame 6, the fourth elastic piece 34 is provided as a spring, and the front side of the swinging frame 6 is provided with a limiting component for changing the position of the second sliding block 32.

As shown in fig. 11, the limiting component comprises a first winding roller 35, the first winding roller 35 is rotationally connected to an adjacent swinging frame 6, a second connecting rope 36 is fixedly connected between the first winding roller 35 and an adjacent second sliding block 32, an anti-slip roller is arranged on the outer side of the first winding roller 35, a user can conveniently rotate the first winding roller 35, when the first winding roller 35 rotates, the first winding roller 35 winds up an adjacent second connecting rope 36, the second sliding block 32 drives a balancing weight 33 on the second winding roller 35 to move to the front side, a second spline rod 37 is connected to the front side of the swinging frame 6 through a spline, a third limiting rod 38 is fixedly connected to the outer end of the second spline rod 37 through a mounting seat, the third limiting rod 38 is in sliding fit with the adjacent swinging frame 6, a groove with equal circumferential spacing is formed in the outer side of the first winding roller 35, after the third limiting rod 38 is in limiting fit with the groove of the adjacent first winding roller 35, the first winding roller 35 cannot mechanically rotate, a fifth spline rod 37 is fixedly connected to a fifth spline rod 39, and a fifth spline rod 39 is fixedly connected to an elastic positioning plate 39 is arranged between the second spline rod 37 and the adjacent swinging frame 6.

As shown in fig. 12-14, the anti-falling device further comprises a load mechanism, the load mechanism is arranged on one side of the bottom plate 1 far away from the controller 101, the load mechanism is used for increasing the upward swinging resistance of the swinging frame 6, the load mechanism comprises two symmetrical second winding rollers 40, the two second winding rollers 40 are fixedly connected to the adjacent transmission rods 31 respectively, the guide frames 41 are fixedly connected to the two sides of the bottom plate 1, the loading blocks 42 are orderly stacked in the guide frames 41, the loading blocks 42 are identical in size and weight, connecting pins 43 are slidably connected between the stacked loading blocks 42, through holes are formed in the middle parts of the loading blocks 42, the connecting pins 43 are located in the middle through holes of the loading blocks 42, the connecting pins 43 are in limit fit with the adjacent loading blocks 42 through pins, blind holes of the loading blocks 42 are communicated with the through holes, after the pins are inserted into the blind holes of the loading blocks 42, the blind holes of the loading blocks 43, the pins are in limit fit with the connecting pins 43, third connecting ropes 44 are fixedly connected between the connecting pins 43 and the adjacent second winding rollers 40, and the third connecting ropes 44 are wound when the second winding rollers 40 rotate along with the transmission rods 31, so that the loading blocks 42 move along the guide frames 3, and the adjacent anti-falling transmission rods 31 are used for preventing the upward sliding components.

As shown in fig. 12 and 13, the anti-falling component comprises a fixed disc 45, the fixed disc 45 is fixedly connected to the adjacent transmission rods 31, six blind holes with equal intervals are formed in the fixed disc 45, a sixth elastic piece 46 is fixedly connected in the blind holes of the fixed disc 45, the sixth elastic piece 46 is provided as a tension spring, a sliding rod 47 fixedly connected with the adjacent sixth elastic piece 46 is connected in a sliding manner in the blind holes of the fixed disc 45, the sliding rod 47 is positioned in the blind holes of the adjacent fixed disc 45 through the tension of the sixth elastic piece 46, a fixed ring 48 is fixedly connected to the sliding column 3 through a mounting frame, the fixed ring 48 is fixed under the fixing effect of the mounting frame and does not rotate, the central axis of the fixed ring 48 coincides with the central axis of the adjacent fixed disc 45, nine second fixed rods 49 with equal intervals are fixedly connected to the fixed ring 48 in a circumferential direction, the second fixed rods 49 are in limit fit with the adjacent sliding rods 47, when the rotation speed of the fixed disc 45 is too high, the sliding rods 47 are enabled to move outwards under the action of centrifugal force, and are limited by the second fixed rods 49 on the same side, and the fixed disc 45 is enabled to stop moving.

When a user pushes the swing frame 6 upwards to perform stretching training on arm and shoulder musculature, initially, as shown in fig. 10, the gravity center of the balancing weight 33 is located on the central axes of the transmission rod 31 and the fourth elastic member 34, when the user pushes the swing frame 6 upwards, the balancing weight 33 rotates synchronously with the adjacent transmission rod 31 during the swing of the swing frame 6, at this time, the gravity of the balancing weight 33 does not need to be overcome, when the user wants to increase the load pushing the swing frame 6, the user sequentially adjusts the positions of the balancing weights 33 at the left side and the right side, to adjust the balancing weight 33 at the left side, for example, the user presses the second spline rod 37 at the left side, the second spline rod 37 drives the adjacent third limit rod 38 to move leftwards through the mounting plate, and the fifth elastic member 39 is compressed, the third limiting rod 38 is not matched with the adjacent swinging frame 6 and the adjacent first winding roller 35, then the user rotates the first winding roller 35 to wind the connected second connecting rope 36, the second connecting rope 36 pulls the second sliding block 32, the second sliding block 32 drives the balancing weight 33 to synchronously move, meanwhile, the fourth elastic piece 34 is compressed, after the user adjusts the balancing weight 33 to reach a designated position, the second spline rod 37 is loosened, at the moment, under the action of the elastic force of the fifth elastic piece 39, the second spline rod 37 moves rightwards to reset, the third limiting rod 38 is matched with the swinging frame 6 again, meanwhile, the third limiting rod 38 is in limiting fit with the groove of the first winding roller 35, the second sliding block 32 is kept fixed, and then the position of the balancing weight 33 on the right side is adjusted by repeating the operation.

When the user pushes the swing frame 6 upward again, the balancing weight 33 swings upward synchronously with the adjacent swing frame 6, the further the distance between the balancing weight 33 and the adjacent transmission rod 31 is, the larger the force required for swinging the balancing weight 33 is, and the user adjusts the position of the balancing weight 33 according to the user's own situation.

When the balancing weight 33 needs to be reset, the second spline rod 37 is only required to be pressed again after the swinging frame 6 is reset, the limit of the third limiting rod 38 on the adjacent first winding roller 35 is released, the second sliding block 32 drives the balancing weight 33 on the second sliding block to reset under the elastic force of the fourth elastic piece 34, and then the pressing of the second spline rod 37 is released, so that the second spline rod 37 and the third limiting rod 38 on the second spline rod are reset.

When the balancing weight 33 moves to the forefront side of the chute of the adjacent swinging frame 6, when the training intensity of a user still cannot be met, the balancing weight 33 is located at the initial position, the user selects the number of the load blocks 42 according to the situation of the user, pins are inserted into blind holes of the load blocks 42 at the designated positions, the pins are matched with the connecting pins 43, when the user pushes the swinging frame 6 upwards, the swinging frame 6 drives the adjacent second winding roller 40 to rotate through the adjacent transmission rod 31, in the process of rotating the second winding roller 40, the second winding roller 40 winds the connected third connecting ropes 44, the third connecting ropes 44 drive the adjacent connecting pins 43 to move upwards, the connecting pins 43 drive the load blocks 42 connected to move upwards under the pulling action of the connecting pins 43, the load blocks 42 slide along the adjacent guide frames 41, the user pushes the swinging frame 6 back and forth, so that the load blocks 42 reciprocate along the adjacent guide frames 41, but because the load blocks 42 are identical, when the load blocks 42 are increased, the weight of the load blocks 42 does not meet the weight specification, and the weight of the user cannot be hurt the user during the second training, and the weight is prevented from being damaged by the accurate weight adjustment of the user, and the weight is adjusted to the weight of the user during the swinging frame 33.

In the training process of the user, the swinging frame 6 drives the adjacent fixed discs 45 to synchronously rotate through the transmission rod 31, at the moment, the centrifugal force generated by the rotation of the fixed discs 45 is insufficient to overcome the pulling force of the sixth elastic piece 46, when the user pushes the swinging frame 6 to the highest position, the arm and shoulder muscles of the user lose force, the arm of the user loses the support on the swinging frame 6, the swinging frame 6 quickly falls down after losing the supporting force, the swinging frame 6 drives the adjacent fixed discs 45 to quickly rotate through the transmission rod 31 in the falling process of the swinging frame 6, the sliding rod 47 is outwards slid along the blind holes of the adjacent fixed discs 45 under the action of the centrifugal force, the sixth elastic piece 46 is stretched, the sliding rod 47 outwards slides, the sliding rod 47 is in limit fit with the adjacent second fixing rod 49, the adjacent sliding rod 47 is limited through the second fixing rod 49, the fixed disc 45 and the adjacent transmission rod 31 stop rotating, the swinging frame 6 stops swinging downwards, the swinging frame 6 is prevented from descending rapidly after the arm of a user loses force, the arm of the user is prevented from being injured, when the swinging frame 6 needs to be reset, the swinging frame 6 only needs to be lifted upwards, the swinging frame 6 drives the fixed disc 45 on the same side to rotate through the adjacent transmission rod 31, the fixed disc 45 drives the sliding rod 47 on the fixed disc to rotate, the sliding rod 47 and the adjacent second fixing rod 49 lose extrusion, then the swinging frame 6 is reset under the action of the pulling force of the sixth elastic piece 46, and meanwhile, the load block 42 is reset.

It will be apparent that the described embodiments are only some, but not all, embodiments of the invention. All other embodiments, which can be made by those skilled in the art and which are included in the embodiments of the present invention without the inventive step, are intended to be within the scope of the present invention. Structures, devices and methods of operation not specifically described and illustrated herein, unless otherwise indicated and limited, are implemented according to conventional means in the art.

Claims

1. The utility model provides a passive shoulder pushes away body-building equipment, its characterized in that, including bottom plate (1), bottom plate (1) rigid coupling has controller (101), one side rigid coupling that bottom plate (1) kept away from controller (101) has symmetrical supporting box (2), sliding connection has sliding column (3) in supporting box (2), sliding column (3) keep away from one end rigid coupling of bottom plate (1) has fixed column (4), and the symmetry fixed column (4) common rigid coupling has connecting block (5), and the symmetry the opposite side of fixed column (4) all rotates and is connected with swing frame (6), and the symmetry swing frame (6) opposite side all rigid coupling has handle (7), connecting block (5) are kept away from one side of bottom plate (1) is provided with symmetrical spout, the spout internal fixation of connecting block (5) has first dead lever (8), sliding connection has first sliding block (10) in the spout of connecting block (5), first dead lever (8) run through adjacent first sliding block (10), first sliding block (10) and first connecting block (10) common rigid coupling has first sliding connection piece (10), a supporting frame (12) is fixedly connected to one side, far away from the grip (7), of the symmetrical supporting box (2), an electric reel (13) electrically connected with the controller (101) is fixedly connected to the supporting frame (12), a pull rope is fixedly connected between the electric reel (13) and the first connecting rope (11), a safety protection mechanism is arranged between the supporting box (2) and the adjacent sliding column (3), and the safety protection mechanism is used for limiting the connecting block (5);

The safety protection mechanism comprises a symmetrical first limiting rod (14), one side of a connecting block (5) away from a grip (7) is provided with symmetrical sliding grooves, two adjacent sliding grooves on the connecting block (5) are mutually communicated, the symmetrical first limiting rod (14) is respectively and slidably connected in the adjacent sliding grooves on one side of the connecting block (5) away from the grip (7), the first limiting rod (14) is fixedly connected with an adjacent first sliding block (10), one side of a supporting frame (12) close to the grip (7) is fixedly connected with a symmetrical limiting block (15), the middle part of the limiting block (15) is provided with a through hole which is in limit fit with the adjacent first limiting rod (14), the first limiting rod (14) is positioned in the through hole of the adjacent limiting block (15), one side of the connecting block (5) close to a bottom plate (1) is fixedly connected with a symmetrical first telescopic rod (16), the telescopic end of the first telescopic rod (16) is fixedly connected with an installation plate and is fixedly connected with the adjacent first limiting rod (14), one side of the T-shaped guide post (17) is fixedly connected with a sealing groove (17), one side of the sealing post (17) is fixedly connected with the sealing post (17), the limiting columns (19) are in extrusion fit with the inner walls of the adjacent supporting boxes (2), hydraulic oil is filled in the T-shaped grooves (17) and the adjacent first oil guide pipes (18), second elastic pieces (20) are fixedly connected between the adjacent limiting columns (19), fixing plates (21) which are symmetrically and uniformly distributed are fixedly connected with the inner walls of the supporting boxes (2), and the fixing plates (21) are in limit fit with the adjacent limiting columns (19);

The elastic force of the first elastic piece (9) is larger than that of the second elastic piece (20), the limiting column (19) is fixedly connected with a protruding block, and the protruding block on the limiting column (19) is matched with the adjacent sliding column (3) and used for limiting the moving distance of the limiting column (19).

2. The passive shoulder-pushing body-building device according to claim 1, further comprising a limit protection mechanism, wherein the limit protection mechanism is arranged on the symmetrical fixed columns (4), the limit protection mechanism is used for limiting the upward moving distance of arms, the limit protection mechanism comprises symmetrical rotating discs (22), the symmetrical rotating discs (22) are respectively and rotatably connected to the adjacent fixed columns (4), torsion springs (23) are fixedly connected between the rotating discs (22) and the adjacent sliding columns (3), a second limit rod (24) in limit fit with the adjacent swinging frame (6) is fixedly connected to one side of the rotating discs (22) close to the handle (7), equidistant grooves are formed in one side of the rotating discs (22) away from the bottom plate (1), first spline rods (25) are connected to one side of the sliding columns (3) through mounting seat splines, a torsion spring (23) is fixedly connected between one end of each first spline rod (25) and the adjacent groove-forming plate on the rotating discs (22), a first spline rod (25) is fixedly connected to the other end of each spline rod (25), and a first spline rod (25) is fixedly connected between the mounting plate (7) and the first spline rod (25) and the mounting plate (25).

3. The passive shoulder-pushing and lifting body-building device according to claim 2, wherein the adjusting assembly comprises a second telescopic rod (27), the second telescopic rod (27) is fixedly connected to a mounting seat adjacent to the sliding column (3), the telescopic end of the second telescopic rod (27) is fixedly connected to a mounting plate adjacent to the first spline rod (25), the handle (7) is provided with an oil storage cavity (28), a piston rod (29) is slidably connected in the oil storage cavity (28), a second oil guide pipe (30) is fixedly connected between the oil storage cavity (28) and the second telescopic rod (27) and communicated with the second oil guide pipe, and hydraulic oil is filled in the oil storage cavity (28) and the second oil guide pipe (30) adjacent to the second oil guide pipe.

4. The passive shoulder-pushing body-building device according to claim 1, further comprising a weight adjusting mechanism, wherein the weight adjusting mechanism is arranged on the swinging frame (6) symmetrically, the weight adjusting mechanism is used for adjusting the load of the swinging frame (6) during swinging, the weight adjusting mechanism comprises symmetrical transmission rods (31), the symmetrical transmission rods (31) are fixedly connected to the adjacent swinging frames (6) respectively, the central axes of the transmission rods (31) are coincident with the central axes of the adjacent fixed columns (4), sliding grooves are formed in the opposite sides of the swinging frames (6) symmetrically, second sliding blocks (32) are connected in the sliding grooves of the swinging frames (6) in a sliding mode, the second sliding blocks (32) are fixedly connected with balancing weights (33), the balancing weights (33) are provided with grooves, the transmission rods (31) are located in the grooves of the adjacent balancing weights (33), fourth elastic pieces (34) are fixedly connected between the second sliding blocks (32) and the adjacent swinging frames (6), and the positions of the swinging frames (6) are changed, and the positions of the second sliding blocks (6) are far away from the fixed columns (32) and the limiting components are changed.

5. The passive shoulder-lift exercise machine of claim 4, wherein the weight (33) is circular, the center of the weight (33) is located on the central axis of the adjacent transmission rod (31), the weight (33) is provided with a pit for balancing gravity, and the center of gravity of the weight (33) is located on the central axis of the adjacent transmission rod (31).

6. The passive shoulder-pushing exercise machine according to claim 4, wherein the limiting component comprises a first winding roller (35), the first winding roller (35) is rotationally connected to the adjacent swinging frame (6), a second connecting rope (36) is fixedly connected between the first winding roller (35) and the adjacent second sliding block (32), a second spline rod (37) is connected to one side of the swinging frame (6) far away from the fixed column (4) through a spline, a third limiting rod (38) is fixedly connected to one end of the second spline rod (37) through a mounting seat, the third limiting rod (38) is in sliding fit with the adjacent swinging frame (6), a circumferential equidistant groove is formed in one side of the first winding roller (35) far away from the adjacent swinging frame (7), a positioning plate is fixedly connected to the other end of the second spline rod (37), and a fifth elastic member is fixedly connected between the second spline rod (37) and the adjacent swinging frame (6).

7. The passive shoulder-pushing body-building device according to claim 4, further comprising a load mechanism, wherein the load mechanism is arranged on one side of the bottom plate (1) away from the controller (101), the load mechanism is used for increasing the upward swinging resistance of the swinging frame (6), the load mechanism comprises symmetrical second rolling rollers (40), the symmetrical second rolling rollers (40) are fixedly connected with adjacent transmission rods (31) respectively, guide frames (41) are fixedly connected to two sides of the bottom plate (1), load blocks (42) are orderly stacked in the guide frames (41), connecting pins (43) are connected between the stacked load blocks (42) in a sliding manner, the connecting pins (43) are in limit fit with the adjacent load blocks (42) through pins, third connecting ropes (44) are fixedly connected between the connecting pins (43) and the adjacent second rolling rollers (40), and the sliding columns (3) are provided with falling-preventing components used for limiting the adjacent transmission rods (31).

8. The passive shoulder-pushing and lifting body-building device according to claim 7, wherein the anti-falling component comprises a fixed disc (45), the fixed disc (45) is fixedly connected to the adjacent transmission rod (31), the fixed disc (45) is provided with circumferentially equidistant blind holes, sixth elastic pieces (46) are fixedly connected in the blind holes of the fixed disc (45), sliding rods (47) fixedly connected with the adjacent sixth elastic pieces (46) are connected in the blind holes of the fixed disc (45) in a sliding manner, fixing rings (48) are fixedly connected to the sliding columns (3) through mounting frames, the central axes of the fixing rings (48) coincide with the central line axes of the adjacent fixed disc (45), circumferentially equidistant second fixing rods (49) are fixedly connected to the fixing rings (48), and the second fixing rods (49) are in limit fit with the adjacent sliding rods (47).