CN218408218U - Universal joint structure for straightening machine - Google Patents

Abstract

The utility model discloses a universal joint structure for straightening machine aims at providing one kind and develops the universal joint structure for straightening machine of installation work automatically when placing mechanical equipment. It includes the connecting axle, install four connecting pipes that are the cross form on the connecting axle, be equipped with air cavity mouth one on the air cavity of a plurality of symmetric distribution on the connecting axle, air cavity mouth two and gas vent, the clamp splice of installation can be dismantled with the connecting pipe in the air cavity mouth one and be connected, install the gasbag in the connecting pipe, the gasbag can be dismantled with the connecting axle and be connected, the gasbag passes through air cavity mouth two and air cavity intercommunication, the removal stopper of air cavity mouth two installations can be dismantled with the gasbag and be connected, the stopper and the gas vent phase-match of gas vent department installation, the gas vent is arranged in between air cavity mouth one and the air cavity mouth two. The utility model has the advantages that: the aim of automatically carrying out installation work when mechanical equipment is placed can be achieved; the limiting effect on the straightening machine can be achieved; the connecting pipe is convenient to mount and dismount; possess and be convenient for carry out spacing structure to the connecting pipe.

Description

Universal joint structure for straightening machine

Technical Field

The utility model belongs to the technical field of the levelling machine technique and specifically relates to indicate a universal joint structure for levelling machine.

Background

The straightening Machine (English name: leveling Machine) is specially used for welding H-shaped steel straightening equipment, wherein a main transmission roller and an upper pressing wheel are both made of high-quality alloy steel, and a heat treatment process is carried out to ensure the service life. In the society after the industrial revolution, the production of mechanical equipment is in batch, and steel is the raw material related to the production of the mechanical equipment, and the quality of a straightening machine is important for the straightening of the steel.

In the using process of the straightening machine, a universal joint which is a part for realizing variable-angle power transmission is an extremely important matching component, can be used for positions needing to change the direction of a transmission axis due to the universal joint, and is a joint component for changing the direction of steel materials of the straightening machine.

Chinese patent grant publication no: CN210218469U, entitled bulletin date 2020, 03, 31, discloses a universal joint assembly with a high sealing structure, which includes a connecting shaft, a universal joint yoke, a universal joint pin and a connecting disc, wherein a bearing cap is fixedly mounted on the outer surface of the upper end of the universal joint yoke, a gasket is fixedly mounted on the outer surface of the upper end of the bearing cap, a fixing bolt is fixedly mounted on the outer surface of the upper end of the gasket, a connecting yoke is fixedly mounted on the outer surface of one side of the connecting disc, the universal joint pin penetrates through the inside of the connecting yoke, a sealing mechanism is arranged on the outer surface of one side of the universal joint pin, an oil seal is fixedly mounted on the outer surface of the upper end of the universal joint pin, a sleeve is fixedly mounted on the outer surface of the upper end of the oil seal, a rolling shaft is arranged inside the universal joint pin, and a difference determining mechanism is fixedly mounted on the outer surface of one side of the universal joint yoke; sealing mechanism includes sealed dish and glib talker, locates sealed inside opening fixed mounting in the spiral snap ring of sealed dish lower extreme surface, locate the inside second funnel of glib talker, locate the inside first funnel of second funnel, locate the oil inlet of first funnel one side, locate the inside screw ring of spiral snap ring. The technical scheme has the disadvantages that in the using process, the mechanical equipment which turns to needs to be connected with the cross shaft in the universal joint assembly, so that the effect of changing the direction through the universal joint can be achieved, but in the work of connecting the mechanical equipment and the universal joint assembly, the mechanical connection needs to be controlled, so that the universal joint assembly and the mechanical equipment are inconvenient to mount and dismount, and the operation is complicated.

In conclusion, the universal joint and the mechanical equipment can be automatically opened when the mechanical equipment is placed, the installation speed of the universal joint and the mechanical equipment is increased, the universal joint and the mechanical equipment are convenient to detach, and the universal joint and the mechanical equipment are safe and reliable.

SUMMERY OF THE UTILITY MODEL

The utility model relates to an overcome among the prior art that there is the not enough that manual control carries out mechanical installation, provide one kind and develop the gimbal structure for the unscrambler of installation work automatically when placing mechanical equipment.

In order to realize the purpose, the utility model adopts the following technical scheme:

the utility model provides a universal joint structure for orthotic machine, includes the connecting axle, install four connecting pipes on the connecting axle, the distribution of four connecting pipes is the cross form, the connecting pipe can be dismantled with the connecting axle and be connected, be equipped with a plurality of air cavity on the connecting pipe, a plurality of air cavity symmetric distribution, be equipped with air cavity mouth one, air cavity mouth two and gas vent on the air cavity, air cavity mouth one, air cavity mouth two and gas vent all communicate with the air cavity, install the clamp block in the air cavity mouth one, the outward flange of clamp block contacts with the inner wall of air cavity mouth one, the clamp block can be dismantled with the connecting pipe and be connected, install the gasbag in the connecting pipe, the gasbag can be dismantled with the connecting axle and be connected, the gasbag passes through air cavity mouth two and communicates with the air cavity, air cavity mouth two department installs the removal stopper, the removal stopper can be dismantled with the gasbag and be connected, the width of air cavity is greater than the width that removes the stopper, remove stopper and air cavity mouth two phase-matches, gas vent is arranged between air cavity mouth two.

The connecting pipes are detachably connected with the connecting shaft, so that the connecting pipes are distributed in a cross shape, the two connecting pipes are symmetrically distributed left and right, the connecting pipes are vertically and symmetrically distributed, the connecting pipes are detachably connected with the connecting shaft, the connecting pipes and the connecting shaft are convenient to mount and dismount, when a universal joint assembly is needed, a connecting piece of the straightening machine can be inserted into the connecting pipes, an air bag mounted in the connecting pipes is extruded, air in the air bag is forced to flow towards the two air cavity ports communicated with the air bag, a movable plug at the two air cavity ports is pushed to move towards the air cavity, the two air cavity ports are opened, air flows into the air cavity and stagnates in the air cavity, under the environment of a continuously flowing air cavity of air bag air, the air in the air cavity can only be discharged outwards from the one air cavity port, a clamp block is mounted in the one air cavity port, the clamp block is in contact with the inner wall of the one air cavity port, the clamp block is detachably connected with the connecting pipe, the straightening machine can be automatically placed in the connecting piece by the extruding machine, and the connecting piece can be automatically placed in the connecting pipe.

Preferably, four connecting discs are installed on the connecting shaft, the connecting pipes correspond to the connecting discs one to one, the connecting pipes are detachably connected with one ends of the connecting discs, and the connecting shafts are detachably connected with the other ends of the connecting discs. The connection pad of design like this can let connecting pipe and connecting axle be done and be connected, and the connection pad here contains four, and connecting pipe and connection pad one-to-one, and the connecting pipe can be dismantled with the one end of connection pad and be connected, and the connecting axle can be dismantled with the other end of connection pad and be connected, so just can carry out four connecting pipes through manual control and install on the connecting axle through the connection pad, and it is easy and simple to handle. The detachable connection mode also facilitates the detachment work of the connecting pipe, and the work of replacing the connecting pipe can be smoothly carried out.

Preferably, a pressing plate is installed at the top end of the air bag, a plurality of compression springs are installed on the pressing plate and symmetrically distributed, the pressing plate is connected with the connecting disc through the compression springs, and the bottom end of the air bag is connected with the connecting disc. The design is through placing the connecting piece of levelling machine in to the connecting tube, can let the connecting piece of levelling machine directly press on the clamp plate, let the clamp plate receive the pressure influence, and the clamp plate is arranged in the top of gasbag, and the bottom of gasbag is connected with the connection pad, then the clamp plate atress after alright carry out an extrusion work to the gasbag, let the gas in the gasbag flow to the air pocket through air pocket two, develop the spacing work that promotes the clamp splice and carry out the levelling machine, moreover, the clamp plate is connected with the connection pad through a plurality of compression spring, just so go on under compression spring's supporting effect when the clamp plate is pressed to remove, remove job stabilization, of course after the promotion work of clamp splice is accomplished, just also the connecting piece of levelling machine extrusion work to the clamp plate, let the clamp plate give up under compression spring's elastic effect automatic the removal, so just can be the work of universal joint subassembly of going on in the cycle.

Preferably, a telescopic pipe is installed at the first air cavity opening, the diameter of the first air cavity opening is larger than that of the telescopic pipe, the first air cavity opening is communicated with the air cavity through the telescopic pipe, and the clamping block is connected with the connecting pipe through the telescopic pipe. After the design flows to the air cavity through gas like this, at the continuation of gas and lets in the in-process, gas alright carry out an extrusion work to the clamp splice through the flexible pipe of an air cavity mouth intercommunication, flexible pipe possess flexible effect, at the clamp splice receive the extrusion removal in-process, flexible pipe has also been driven by the clamp splice and has been extended, let the effectual connecting piece that touches the levelling machine of clamp splice, there is a spacing effect to the levelling machine, of course the cancellation is to the extrusion work back of clamp splice, the flexible effect of flexible pipe just can also let the clamp splice move towards an air cavity mouth direction, resume the normal position.

Preferably, the plug is provided with a protruding shaft, and the protruding shaft is arranged outside the exhaust port. The plug connected can be controlled through the convex shaft of the exhaust port, the connection work of the plug and the connecting pipe is disassembled, so that the gas in the gas cavity can be discharged from the exhaust port, and the clamping block can move back to the original position under the telescopic effect of the telescopic pipe.

Preferably, a limiting groove is formed in the connecting disc, a moving block is installed in the limiting groove, the moving block is movably connected with the connecting disc, and the moving block is matched with the connecting pipe. The design can let the tip of connecting pipe insert through the spacing groove on the connection pad like this, and is installing the movable block in the spacing groove, and the movable block here is connected with connection pad swing joint, and the movable block is with the connecting pipe assorted, so the tip of connecting pipe just can place the movable block, in the work of movable block automatic movement, spacing here, spacing work is simple and easy.

Preferably, a moving cavity is formed in the connecting disc and communicated with the limiting groove, a limiting block is installed in the moving cavity and connected with the moving block, and the limiting block is movably connected with the connecting disc. The design can be well communicated with the limiting groove through the moving cavity on the connecting disc, after the end part of the connecting pipe is inserted into the moving block at the limiting groove, the limiting block movably connected with the connecting disc is controlled to control the moving block connected with the limiting block to move, and the connecting pipe can be smoothly limited at the limiting groove.

Preferably, the limiting block is provided with a spring, the moving block is connected with the limiting block through the spring, the moving cavity is provided with a cavity opening, the cavity opening is provided with a drawing board, the top end of the drawing board is arranged outside the moving cavity, and the bottom end of the drawing board is matched with the cavity opening. The design can insert the picture peg into the accent through the control of removing the outer picture peg top of chamber through taking out the picture peg like this, the accent communicates with removal chamber, the insertion of taking out the picture peg so can have an extrusion effect to the stopper that removes the intracavity, let the stopper receive the extrusion and remove towards the movable block direction, and the movable block is connected through spring and stopper, the movable block so just is to the spacing groove direction removal under the elastic effect of the removal work of stopper and spring, there is an extrusion spacing effect to the tip of the connecting pipe that spacing groove department placed.

Preferably, the one end of stopper is passed through the spring and is connected with the movable block, the other end of stopper is equipped with the shifting chute, take out and install removal strip and dog on the picture peg, take out the picture peg and be connected with the stopper through the cooperation that removes strip and shifting chute, the top of taking out the picture peg is arranged in to the dog, the width of dog is greater than the width of taking out the picture peg. The shifting chute that sets up through stopper other end department like this designs, when can letting take out the picture peg and insert in the cavity, lets take out the removal strip on the picture peg and insert, just so can take out the picture peg and can move down smoothly, and produce an extrusion work to the stopper, let the stopper can be smooth drive the removal of movable block, play spacing effect to the tip of connecting pipe. The stop block at the top end of the drawing and inserting plate can prevent the complete end part of the drawing and inserting plate from being completely inserted into the cavity opening, so that the drawing and inserting work of the drawing and inserting plate cannot be smoothly carried out.

Preferably, a plurality of grooves are formed in the outer edge of the limiting block and are evenly distributed, a plurality of groove shafts are installed on the connecting disc, and the limiting block is connected with the connecting disc through the matching of the grooves and the groove shafts. The design can cooperate a plurality of recess axle of installation on the connection pad through a plurality of recess of evenly distributed on the outward flange of stopper like this and let the removal work of stopper go on under the spacing condition of connection pad, the stability of removal.

The utility model has the advantages that: the aim of automatically carrying out installation work when mechanical equipment is placed can be achieved; the limiting effect on the straightening machine can be achieved; the connecting pipe is convenient to mount and dismount; possess and be convenient for carry out spacing structure to the connecting pipe.

Drawings

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

FIG. 2 is a schematic distribution diagram of the connecting pipe of the present invention;

FIG. 3 is a schematic structural view taken along line A in FIG. 2;

FIG. 4 is a schematic structural diagram of the limiting block of the present invention;

fig. 5 is a schematic structural view of the drawing and inserting plate of the present invention;

fig. 6 is a schematic view of the connection pipe of the present invention in an operating state;

fig. 7 is a schematic view of another working state of the connecting pipe of the present invention.

In the figure: 1. the device comprises a connecting shaft, 2, a connecting pipe, 3, a pressing plate, 4, an air bag, 5, a clamping block, 6, a connecting disc, 7, an air outlet, 8, a moving cavity, 9, a cavity opening, 10, a limiting groove, 11, a moving block, 12, a spring, 13, a limiting block, 14, a drawing and inserting plate, 15, a moving groove, 16, a groove, 17, a moving strip, 18, a stop block, 19, a plug, 20, a convex shaft, 21, a compression spring, 22, an air cavity, 23, an air cavity opening I, 24, an air cavity opening II, 25, a telescopic pipe, 26 and a moving plug.

Detailed Description

The following description of the present invention will be made with reference to the accompanying drawings.

In the embodiment shown in fig. 1, fig. 2, fig. 6 and fig. 7, a universal joint structure for an orthotic machine, includes a connecting shaft 1, four connecting pipes 2 are installed on the connecting shaft 1, the distribution of the four connecting pipes 2 is cross-shaped, the connecting pipes 2 are detachably connected with the connecting shaft 1, a plurality of air cavities 22 are arranged on the connecting pipes 2, the plurality of air cavities 22 are symmetrically distributed, a first air cavity opening 23, a second air cavity opening 24 and an exhaust opening 7 are arranged on the air cavities 22, the first air cavity opening 23, the second air cavity opening 24 and the exhaust opening 7 are both communicated with the air cavities 22, a clamping block 5 is installed in the first air cavity opening 23, the outer edge of the clamping block 5 is in contact with the inner wall of the first air cavity opening 23, the clamping block 5 is detachably connected with the connecting pipes 2, an air bag 4 is installed in the connecting pipes 2, the air bag 4 is detachably connected with the connecting shaft 1, the air bag 4 is communicated with the air cavities 22 through the second air cavity openings 24, a movable plug 26 is installed at the second air cavity opening 24, the movable plug 26 is detachably connected with the air cavity opening 4, the movable plug 26 is installed at the second air cavity opening 24, the air cavity opening 22, the movable plug 22 is installed at the exhaust opening 19, the exhaust opening 23 is installed between the air cavity opening 23 and the air cavity opening 23, the exhaust opening 24, the movable plug 22, the movable plug 19 is installed at the exhaust opening 7.

As shown in fig. 1, 6 and 7, four connecting discs 6 are mounted on the connecting shaft 1, the connecting pipes 2 correspond to the connecting discs 6 one to one, the connecting pipes 2 are detachably connected with one ends of the connecting discs 6, and the connecting shaft 1 is detachably connected with the other ends of the connecting discs 6. Pressing plate 3 is installed on the top of gasbag 4, installs a plurality of compression spring 21 on pressing plate 3, and a plurality of compression spring 21 symmetric distribution, pressing plate 3 pass through compression spring 21 and are connected with connection pad 6, and the bottom and the connection pad 6 of gasbag 4 are connected. An extension tube 25 is arranged at the first air cavity opening 23, the diameter of the first air cavity opening 23 is larger than that of the extension tube 25, the first air cavity opening 23 is communicated with the air cavity 22 through the extension tube 25, and the clamping block 5 is connected with the connecting tube 2 through the extension tube 25. The plug 19 is provided with a protruding shaft 20, and the protruding shaft 20 is arranged outside the exhaust port 7.

As shown in fig. 2, 3, 4 and 5, the connecting plate 6 is provided with a limiting groove 10, a moving block 11 is installed in the limiting groove 10, the moving block 11 is movably connected with the connecting plate 6, and the moving block 11 is matched with the connecting pipe 2. Be equipped with on connection pad 6 and remove chamber 8, remove chamber 8 and spacing groove 10 intercommunication, remove and install stopper 13 in the chamber 8, stopper 13 is connected with movable block 11, stopper 13 and connection pad 6 swing joint. A spring 12 is installed on the limiting block 13, the moving block 11 is connected with the limiting block 13 through the spring 12, a cavity opening 9 is formed in the moving cavity 8, a plugging plate 14 is installed at the cavity opening 9, the top end of the plugging plate 14 is arranged outside the moving cavity 8, and the bottom end of the plugging plate 14 is matched with the cavity opening 9. One end of the limiting block 13 is connected with the moving block 11 through a spring 12, the other end of the limiting block 13 is provided with a moving groove 15, a moving strip 17 and a stop block 18 are installed on the plug board 14, the plug board 14 is connected with the limiting block 13 through the matching of the moving strip 17 and the moving groove 15, the stop block 18 is arranged at the top end of the plug board 14, and the width of the stop block 18 is larger than that of the plug board 14. Be equipped with a plurality of recess 16 on the outward flange of stopper 13, a plurality of recess 16 evenly distributed installs a plurality of recess axle on the connection pad 6, and stopper 13 is connected with connection pad 6 through the cooperation of recess 16 and recess axle.

Firstly, carefully observing whether a pressing plate 3 in a connecting pipe 2 is stably placed, then connecting the lower end of a connecting disc 6 with a connecting shaft 1 to enable four connecting discs 6 to be installed on the connecting shaft 1 and be in a cross shape, then connecting the four connecting pipes 2 opposite to the upper ends of the connecting discs 6, wherein the connecting shaft 1 and the connecting discs 6 can be connected in a threaded connection mode to facilitate installation and disassembly of the connecting discs 6, the end parts of the connecting pipes 2 are required to be inserted into limiting grooves 10 on the connecting discs 6 between the connecting pipes 2 and the connecting discs 6, furthermore, a moving cavity 8 and a cavity opening 9 are also arranged on the connecting discs 6, the limiting grooves 10 and the cavity openings 9 are communicated with the moving cavity 8, so that the end parts of the connecting pipes 2 can be inserted into a moving block 11 placed in the limiting grooves 10, the moving block 11 is matched with the connecting pipe 2, then the inserting plate 14 can be controlled to be inserted into the cavity opening 9 by controlling the stop block 18 arranged at the top end of the inserting plate 14, in the inserting work, the moving strip 17 arranged on the inserting plate 14 can be smoothly inserted into the moving groove 15 on the limiting block 13, the moving strip 17 can move downwards along the moving groove 15, the moving work is stable, the limiting block 13 can be smoothly pushed to move towards the moving block 11, not only can the limiting block 13 move towards the moving block 11, but also the moving block 11 is connected with the limiting block 13 through the spring 12, the moving block 13 can be pushed to move by moving of the limiting block 13, and under the elastic effect of the spring 12, the end part of the connecting pipe 2 is stably limited at the position of the limiting groove 10.

After the connection work of the connecting pipe 2 and the connecting disc 6 is done, the connecting piece of the straightening machine is placed in the connecting pipe 2, the air bag 4 is installed in the connecting pipe 2, the top end of the air bag 4 is connected with the pressing plate 3, so that the connecting piece of the straightening machine is placed on the pressing plate 3, an extrusion effect is exerted on the pressing plate 3, after the pressing plate 3 is extruded, the pressing effect is generated on the air bag 4, the air in the air bag 4 is discharged out of the air chamber, the air flows into the air chamber 22 communicated with the air chamber port two 24 through the air chamber port two 24 on the connecting pipe 2, when the air is discharged into the air chamber 22 from the air chamber port two 24, the movable plug 26 installed at the air chamber port two 24 is pushed, the movable plug 26 moves towards the air chamber 22, the air chamber port two 24 can be opened, the movable plug 26 can be selectively connected with the air bag 4 by using a spring, so that the movable plug 26 can conveniently move to open the air chamber port two 24, when the gas impact can be cancelled, under the elastic effect of the spring, the movable plug 26 moves to block the second air cavity opening 24, the air cavity 22 flows, the air outlet 7 communicated with the air cavity 22 is blocked by the plug 19, the gas can only be discharged from the first air cavity opening 23, the clamping block 5 is also arranged in the first air cavity opening 23, the outer edge of the clamping block 5 is contacted with the inner wall of the first air cavity opening 23, the clamping block 5 is connected with the connecting pipe 2 through the telescopic pipe 25, the gas flows into the telescopic pipe 25 under the guide of the first air cavity opening 23, the clamping block 5 connected with the telescopic pipe 25 is pushed to work, the clamping block 5 moves towards the connecting pipe 2 until contacting with the connecting piece of the straightening machine arranged in the connecting pipe 2, and plays an extrusion effect on the connecting piece of the straightening machine, so that the connecting piece of the straightening machine is limited in the connecting pipe 2 under the extrusion condition, moreover, the gas can not be sent from the inside to the outside of the gas cavity 22, the extrusion effect is always available, and the connection between the connecting piece of the straightening machine and the universal joint component can be automatically carried out only by placing the connecting piece of the straightening machine, so that the aim of automatically carrying out installation work when mechanical equipment is placed is fulfilled, and the required steering work can be carried out subsequently.

After the steering operation is finished, the convex shaft 20 can be controlled firstly, the plug 19 connected with the convex shaft 20 is separated from the connecting pipe 2, so that the gas in the gas cavity 22 can be discharged from the exhaust port 7, the clamping block 5 returns to the gas cavity port 23 under the telescopic effect of the telescopic pipe 25, and the straightening machine can be taken out smoothly. Moreover, under the elastic effect of the compression spring 21, the pressing plate 3 can also automatically move upwards and return to the original position, so that the next limiting operation of the straightening machine is facilitated.

Here, the plug 19 and the exhaust port 7 may be connected by a screw, and the plug 19 may be fitted with a rubber having a high air tightness, so that the plug 19 and the connection pipe 2 may be smoothly disconnected when the protruding shaft 20 outside the exhaust port 7 is controlled. The extension tube 25 can be made of rubber sleeved with springs, the springs and the rubber have elastic effects, and the rubber is soft and convenient to install or replace.

Claims (10)

1. The universal joint structure for the straightening machine is characterized by comprising a connecting shaft (1), wherein four connecting pipes (2) are mounted on the connecting shaft (1), the four connecting pipes (2) are distributed in a cross shape, the connecting pipes (2) are detachably connected with the connecting shaft (1), a plurality of air cavities (22) are arranged on the connecting pipes (2), the air cavities (22) are symmetrically distributed, a first air cavity opening (23), a second air cavity opening (24) and an exhaust opening (7) are arranged on the air cavities (22), the first air cavity opening (23), the second air cavity opening (24) and the exhaust opening (7) are all communicated with the air cavities (22), a clamping block (5) is mounted in the first air cavity opening (23), the outer edge of the clamping block (5) is in contact with the inner wall of the first air cavity opening (23), the clamping block (5) is detachably connected with the connecting pipes (2), an air bag connecting pipe (4) is mounted in the air cavities (2), the air bag (4) is detachably connected with the connecting shaft (1), the air bag (4) is communicated with the connecting shaft (22) through the second air cavity opening (24), the movable plug (26), and the movable plug (26) is wider than the air cavity plug (26), the movable plug (26) is matched with the second air cavity opening (24), the plug (19) is installed at the exhaust opening (7), the plug (19) is matched with the exhaust opening (7), and the exhaust opening (7) is arranged between the first air cavity opening (23) and the second air cavity opening (24).

2. The universal joint structure for the straightening machine according to claim 1, wherein four connecting discs (6) are mounted on the connecting shaft (1), the connecting pipes (2) correspond to the connecting discs (6) in a one-to-one manner, the connecting pipes (2) are detachably connected with one ends of the connecting discs (6), and the connecting shaft (1) is detachably connected with the other ends of the connecting discs (6).

3. The universal joint structure for the straightening machine according to claim 2, wherein a pressing plate (3) is installed at the top end of the air bag (4), a plurality of compression springs (21) are installed on the pressing plate (3), the compression springs (21) are symmetrically distributed, the pressing plate (3) is connected with the connecting disc (6) through the compression springs (21), and the bottom end of the air bag (4) is connected with the connecting disc (6).

4. The universal joint structure for the straightening machine according to the claim 1, characterized in that a telescopic pipe (25) is installed at the first air cavity opening (23), the diameter of the first air cavity opening (23) is larger than that of the telescopic pipe (25), the first air cavity opening (23) is communicated with an air cavity (22) through the telescopic pipe (25), and the clamping block (5) is connected with the connecting pipe (2) through the telescopic pipe (25).

5. The gimbal structure for an orthotic device according to claim 1, wherein the plug (19) has a protruding shaft (20) mounted thereon, the protruding shaft (20) being disposed outside the exhaust port (7).

6. The universal joint structure for the straightening machine according to claim 2, wherein a limiting groove (10) is formed in the connecting disc (6), a moving block (11) is installed in the limiting groove (10), the moving block (11) is movably connected with the connecting disc (6), and the moving block (11) is matched with the connecting pipe (2).

7. The universal joint structure for the straightening machine according to claim 6, wherein a moving cavity (8) is arranged on the connecting disc (6), the moving cavity (8) is communicated with a limiting groove (10), a limiting block (13) is arranged in the moving cavity (8), the limiting block (13) is connected with a moving block (11), and the limiting block (13) is movably connected with the connecting disc (6).

8. The universal joint structure for the straightening machine according to claim 7, characterized in that a spring (12) is installed on the limiting block (13), the moving block (11) is connected with the limiting block (13) through the spring (12), a cavity opening (9) is formed in the moving cavity (8), a drawing board (14) is installed at the cavity opening (9), the top end of the drawing board (14) is arranged outside the moving cavity (8), and the bottom end of the drawing board (14) is matched with the cavity opening (9).

9. The universal joint structure for the straightening machine according to claim 8, wherein one end of the limiting block (13) is connected with a moving block (11) through a spring (12), a moving groove (15) is formed in the other end of the limiting block (13), a moving strip (17) and a stop block (18) are installed on the inserting plate (14), the inserting plate (14) is connected with the limiting block (13) through the matching of the moving strip (17) and the moving groove (15), the stop block (18) is arranged at the top end of the inserting plate (14), and the width of the stop block (18) is larger than that of the inserting plate (14).

10. The universal joint structure for the straightening machine according to claim 7, wherein a plurality of grooves (16) are formed in the outer edge of the limiting block (13), the plurality of grooves (16) are evenly distributed, a plurality of groove shafts are mounted on the connecting disc (6), and the limiting block (13) is connected with the connecting disc (6) through the matching of the grooves (16) and the groove shafts.

Images