CN212424995U

CN212424995U - Convex key type slip shaft

Info

Publication number: CN212424995U
Application number: CN202020560873.9U
Authority: CN
Inventors: 杨代华; 郑尧舜
Original assignee: Shanghai Chengbing Machinery Co ltd
Current assignee: Shanghai Chengbing Machinery Co ltd
Priority date: 2020-04-15
Filing date: 2020-04-15
Publication date: 2021-01-29
Anticipated expiration: 2030-04-15

Abstract

The utility model relates to a convex key formula slippage axle relates to the interior support field of coiling strip, establish the epaxial slippage ring of main shaft including main shaft and cover, the expansion tank has been seted up along the length direction of main shaft to main shaft week side, is provided with the gasbag in the expansion tank, is provided with between gasbag and the slippage ring and slides complex friction disc with the main shaft, and five have been seted up at least to the expansion tank, and the expansion tank is circular array evenly distributed along the main shaft circumferencial direction. To the problem that current slip axle in use moment of torsion is not enough, the utility model discloses have the effect of the maximum torque of reinforcing slip axle, make the work of slip axle more reliable.

Description

Convex key type slip shaft

Technical Field

The utility model belongs to the technical field of the interior support of coiling strip and specifically relates to a convex key formula slippage axle is related to.

Background

A splitting machine is a mechanical device for splitting wide paper, mica tapes or films into a plurality of narrow materials, and is commonly used for paper making machinery, wire and cable mica tapes and printing and packaging machinery. A splitting machine can use a slip shaft to wind paper or other strip-shaped products, and the slip shaft can slip when the tensile force reaches a certain value, so that the paper and other products are protected.

A conventional slip shaft, for example, chinese patent publication No. CN209957140U, discloses a central air pressure type narrow-width slip shaft. The slip shaft comprises a main shaft, a slip ring inner ring and a slip ring outer ring; the inner ring of the slip ring is sleeved on the main shaft, and the outer ring of the slip ring is sleeved outside the inner ring of the slip ring; an expansion block capable of expanding in a protruding manner is arranged on the outer ring of the slip ring; the outer surface of the inner ring of the slip ring is provided with an inclined surface lug, and when the inner ring of the slip ring rotates relative to the outer ring of the slip ring, the inclined surface lug can drive the expansion block to bulge out; the outer surface of the slip ring outer ring is provided with a roller which can be retracted into the slip ring outer ring; an air bag is arranged between the inner ring of the slip ring and the main shaft, friction plates are arranged between the air bag and the inner ring of the slip ring, four groups of the air bag and the friction plates are arranged along the circumferential direction of the main shaft and are uniformly distributed on the circumferential side of the whole main shaft in a circumferential array.

The above prior art solutions have the following drawbacks: after the slip ring is sleeved on the main shaft, a high-pressure gas bag is filled in an air bag shaft to jack up the friction plate so that the friction plate is abutted against an inner ring of the slip ring, the main shaft drives the slip ring to rotate through static friction force between the friction plate and the inner ring, when the pulling force on the slip ring is greater than the maximum static friction force provided by the friction plate, the slip ring and the main shaft can slip, and products on the slip shaft are prevented from being damaged by pulling; in the scheme, four groups of air bags and friction plates are arranged on the main shaft along the circumferential direction, when any friction plate moves right above the main shaft due to the rotation of the main shaft, the abutting force between the inner ring of the slip ring and the friction plate at the upper end of the main shaft is increased under the action of gravity, but the abutting force between the friction plates at the lower end of the main shaft and at two sides of the main shaft and the inner ring is reduced, so that the maximum static friction force is reduced, only the friction plate at the upper end of the main shaft can effectively apply torque to the inner ring under the condition, the maximum torque of the main shaft to the inner ring can be reduced, and the normal work of the slip.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a not enough to prior art exists, the utility model aims at providing a protruding key formula slippage axle, slippage axle rotate at least two sets of friction discs of in-process can effectively provide torsion for the slippage ring to improve the maximum torque of slippage axle during operation, make the work of slippage axle more reliable.

The above utility model discloses an above-mentioned utility model purpose can realize through following technical scheme:

the utility model provides a convex key formula slippage axle, includes that main shaft and cover establish main epaxial slippage ring, main shaft week side is followed the expansion tank has been seted up to the length direction of main shaft, the main expansion inslot is provided with the gasbag, the gasbag with be provided with between the slippage ring with the main shaft complex friction disc that slides, five have been seted up at least in the expansion tank, the expansion tank is followed the main shaft circumferencial direction is circular array evenly distributed.

By adopting the technical scheme, the number of the expansion grooves on the main shaft is more than or equal to five, namely, the periphery of the main shaft is uniformly distributed with the expansion assemblies consisting of at least five groups of air bags and friction plates, after the air bags are filled with high-pressure gas, no matter what angle the main shaft rotates, at least two friction plates are in close contact with the slip ring under the action of gravity, the minimum torque between the main shaft and the slip ring under the rotation state of the slip shaft is improved, so that the change of the maximum torque of the slip shaft under the rotation state of the slip shaft is reduced, and the working state of the slip shaft is more stable and reliable.

The present invention may be further configured in a preferred embodiment as: six expansion grooves are formed in the main shaft.

By adopting the technical scheme, the six expansion grooves are pairwise arranged at two ends of the same symmetric shaft of the end surface of the main shaft respectively, the friction coefficients of the friction plates and the slip ring at all positions are the same in the rotating process, the gravity influence on the friction pieces in the expansion grooves at the two ends of the same symmetric shaft is just opposite, the positive pressure increased between the upper end friction plate and the slip ring and the reduced positive pressure between the lower end friction plate and the slip ring can be complemented with each other, and the interference of position change on the maximum static friction force between the main shaft and the slip ring can be effectively reduced.

The present invention may be further configured in a preferred embodiment as: the slip difference ring comprises an outer ring, an inner ring which is in running fit with the outer ring and a fastener which is used for fastening a sleeve workpiece on the outer ring, the fastener comprises a tensioning piece and an elastic pre-tensioning piece which protrudes out of the peripheral side plane of the outer ring and can be pressed back into the outer ring, a tensioning inclined plane which is matched with the tensioning piece and used for ejecting the tensioning piece when the tensioning piece moves relatively in a certain direction is arranged on the inner ring, tensioning holes and pre-tensioning holes are respectively arranged on the outer ring corresponding to the tensioning piece and the elastic pre-tensioning piece, and the tensioning piece is in sliding fit with the tensioning holes.

By adopting the technical scheme, high-pressure gas is filled into the air bag, so that the friction plate is abutted against the inner wall of the inner ring, and the relative position of the inner ring and the main shaft is fixed; the sleeve parts such as a paper tube or a plastic tube for rolling products are sleeved on the outer ring, the elastic pre-tightening part tightly supports the inner wall of the sleeve part and generates a certain static friction force, due to the compressible property of the elastic pre-tightening part, the elastic pre-tightening part cannot generate large interference on the installation of the sleeve part, the sleeve part is rotated to enable the pre-tightening part to rotate along with the sleeve part (the rotating direction is opposite to the rolling direction of the slip shaft), the pre-tightening part drives the outer ring to rotate relative to the inner ring, the tensioning part rotates relative to the inner ring under the driving of the outer ring and outwards protrudes along the radial direction of the slip ring under the abutting force of the tensioning inclined plane, and the sleeve part is abutted against the inner wall of the sleeve part, so that more stable fixation is realized; in the rotation process of the slip shaft, the tensioning block is matched with the tensioning inclined plane, so that the tensioning block continuously receives outward thrust, sufficient torsion is ensured between the slip ring and the sleeve part, and the slip ring and the sleeve part cannot rotate relatively.

The present invention may be further configured in a preferred embodiment as: the pre-tightening hole is a counter bore, the elastic pre-tightening piece is fixed in the pre-tightening hole through inserting, the pre-tightening sleeve with a T-shaped outline is arranged in the pre-tightening hole, the abutting ball in the pre-tightening sleeve and the pre-tightening spring abutted to the abutting ball are arranged, the pre-tightening sleeve is far away from one end of the pre-tightening spring, a clamping joint is arranged at the first anti-falling ring of the abutting ball, the one end of the abutting ball is arranged at the second anti-falling ring abutted to the end of the pre-tightening spring, the abutting ball protrudes out of the outer ring surface under the action of no external force, a circular ring-shaped avoiding groove matched with the pre-tightening sleeve in a sliding mode is formed in the inner ring, and the avoiding groove is coaxial with the inner ring.

By adopting the technical scheme, two ends of the pre-tightening spring are respectively abutted against the second anti-drop ring and the abutting ball to provide ground relay for the abutting ball, the abutting ball protrudes out of the pre-tightening sleeve and is a spherical abutting head, the first anti-drop ring can prevent the abutting ball from completely separating from the pre-tightening sleeve, the spherical abutting head has smaller resistance to the sleeve piece axially installed, and can automatically retract into the pre-tightening sleeve under the action of axial force, and the abutting ball can facilitate the installation of the sleeve piece; the T-shaped pre-tightening sleeve is abutted against the bottom of the counter bore of the pre-tightening hole, so that the pre-tightening sleeve is prevented from being completely retracted into the outer ring under the action of pressure, and the reliability of the pre-tightening function of the elastic pre-tightening piece is improved; the avoidance groove can provide enough installation space for the elastic preload piece, and the elastic preload piece is prevented from interfering the relative rotation of the inner ring and the outer ring.

The present invention may be further configured in a preferred embodiment as: the supporting section that the inner ring week side was fixed with the outer loop butt, dodge the groove and cut apart the supporting section, dodge the trench and be located the central point of inner ring puts.

By adopting the technical scheme, the avoidance groove is positioned at the central position of the inner ring, so that the two support ends at the same position have the same thickness, and the connection between the outer ring and the inner ring is more stable; the support section enables the inner ring and the outer ring to be coaxial and to rotate relatively, and the reduction of the area of the support section can also reduce the sliding friction force between the inner ring and the outer ring, so that the inner ring and the outer ring can rotate relatively more easily.

The present invention may be further configured in a preferred embodiment as: and the edge positions of the support section and the butt joint end of the outer ring are provided with round guide angles.

Through adopting above-mentioned technical scheme, reduce the butt area between inner ring and the outer loop, reduce frictional resistance, release stress that fillet structure can be better strengthens the structural strength at butt position, better performance supporting role.

The present invention may be further configured in a preferred embodiment as: and an arc-shaped sliding block is fixed on one side of the tensioning piece, which is close to the inner ring.

By adopting the technical scheme, the friction resistance of the tensioning block and the tensioning inclined plane during relative sliding is reduced, so that the slip shaft is easy to operate.

The present invention may be further configured in a preferred embodiment as: the inner ring is a ferromagnetic circular ring, and a magnetic reset piece is fixed on one side of the tensioning piece, which is close to the inner ring.

Through adopting above-mentioned technical scheme, the tight spare that rises is protruding to one side of keeping away from the inner ring under the effect that rises on the inclined plane that rises, and the tight spare that rises probably because and the friction force that rises between the tight hole or be located the below of main shaft after the relative inner ring of outer ring back of rise initial position can't retract, disturbs sleeve part and from the epaxial dismantlement of slip, and magnetism between magnetic reset piece and the inner ring provides the restoring force for the tight spare that rises.

The present invention may be further configured in a preferred embodiment as: and one side of the expansion piece close to the expansion hole is fixedly provided with a butt joint block which is in sliding fit with the expansion hole, and one side of the butt joint block far away from the inner ring is provided with resistance increasing grains.

Through adopting above-mentioned technical scheme, increase the frictional force between tight spare and the cover barrel spare inner wall that rises, guarantee to have enough big moment of torsion between slip ring and the cover barrel spare.

To sum up, the utility model discloses a following at least one useful technological effect:

after the air bags are filled with high-pressure gas, no matter what angle the main shaft rotates, at least two friction plates are in close contact with the slip ring under the action of gravity, so that the minimum torque between the main shaft and the slip ring in the rotating state of the slip shaft is improved, the change of the maximum torque of the slip shaft in the rotating state of the slip shaft is reduced, and the working state of the slip shaft is more stable and reliable;

through the fastener combination that sets up elasticity pretension piece and rising piece, make the installation of cover barrel convenient and fast more, provide enough big moment of torsion simultaneously between slip ring and the cover barrel.

Drawings

FIG. 1 is a schematic structural view of the present embodiment;

FIG. 2 is a schematic structural diagram of a slip ring in the present embodiment;

FIG. 3 is an enlarged schematic view of area A of FIG. 1;

fig. 4 is a schematic structural diagram of the slip ring in the present embodiment (hidden outer ring).

Reference numerals: 1. a main shaft; 11. an expansion tank; 12. an air bag; 13. a friction plate; 2. a slip ring; 21. an outer ring; 211. tensioning holes; 212. pre-tightening the hole; 22. an inner ring; 221. tensioning the inclined plane; 222. an avoidance groove; 223. a support section; 224. a round lead angle; 23. a fastener; 24. a tensioning member; 241. an arc-shaped sliding block; 242. a magnetic reset member; 243. a butting block; 244. increasing resistance lines; 245. limiting the side edges; 25. an elastic preload member; 251. pre-tightening the sleeve; 252. abutting the ball; 253. pre-tightening the spring; 254. a first anti-slip ring; 255. and a second anti-slip ring.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

Referring to fig. 1, the key type slip shaft includes a main shaft 1 and a slip ring 2 sleeved on the main shaft 1, where the slip ring 2 includes an outer ring 21 and an inner ring 22, and a fastening member 23 disposed between the outer ring 21 and the inner ring 22 and used for fixing a sleeve member for rolling paper, film, and other products; six cuboid-shaped expansion grooves 11 are formed in the side wall of the periphery of the main shaft 1, the six expansion grooves 11 are uniformly distributed in a circular array along the circumferential direction of the main shaft 1, air bags 12 for external air supply are arranged in the expansion grooves 11, strip-shaped friction plates 13 matched with the expansion grooves 11 in a sliding mode are arranged on one sides, away from the main shaft 1, of the air bags 12, one sides, close to the slip ring 2, of the friction plates 13 are arranged to be arc surfaces corresponding to the inner side arc surfaces of the inner ring 22 of the slip ring 2, the effective contact area between the friction plates 13 and the slip ring 2 is increased, and the maximum static friction. High-pressure gas is filled in the air bag 12, one end of the arc surface of the friction plate 13 is pushed out of the peripheral side surface of the main shaft 1 to tightly push against the slip ring 2, and the static friction force between the friction plate 13 and the inner ring 22 of the slip ring 2 drives the inner ring 22 of the slip ring 2 to rotate along with the cylinder wall of the main shaft 1.

Referring to fig. 1 and 2, the peripheral side of the outer ring 21 is provided with four tensioning holes 211 and four pre-tightening holes 212, the tensioning holes 211 and the pre-tightening holes 212 are used for installing the fasteners 23, the tensioning holes 211 and the pre-tightening holes 212 are alternately arranged and are uniformly distributed in a circular array along the circumferential direction of the outer ring 21, and the fasteners 23 include tensioning members 24 and elastic pre-tightening members 25 respectively installed in the tensioning holes 211 and the pre-tightening holes 212.

Referring to fig. 3 and 4 again, the pre-tightening member includes a hollow T-shaped cylindrical pre-tightening sleeve 251, an abutting ball 252 slidably disposed in the pre-tightening sleeve 251, and a pre-tightening spring 253 disposed in the pre-tightening sleeve 251 for providing a pre-tightening force to the abutting ball 252, the pre-tightening hole 212 is disposed as a countersunk hole corresponding to the pre-tightening sleeve 251, and a convex edge of an end portion of the T-shaped pre-tightening sleeve 251 abuts against a bottom of the countersunk hole of the pre-tightening hole 212 to limit the position of the pre-tightening sleeve 251; one side of the pre-tightening sleeve 251, which is far away from the outer ring 21, is provided with a second anti-falling ring 255 in an extending ring shape on the inner side of the pre-tightening sleeve 251, the second anti-falling ring 255 is abutted against one end of the pre-tightening spring 253, one end of the pre-tightening sleeve 251, which is far away from the second anti-falling ring 255, is provided with a first anti-falling ring 254, which is clamped with the abutting ball 252, and when the abutting ball 252 is abutted against the first anti-falling ring 254, one side of the abutting ball 252, which is far away from the pre-tightening spring 253, protrudes out of the; an annular avoiding groove 222 coaxial with the inner ring 22 is formed in the central position of the circumferential side of the inner ring 22 to prevent the inner ring 22 and the pre-tightening sleeve 251 from interfering with each other.

The periphery of the inner ring 22 is provided with four tensioning inclined planes 221, the four tensioning inclined planes 221 are uniformly distributed along the circumferential direction of the inner ring 22 in a circular array, a supporting section 223 is arranged on the outer side of the inner ring 22 provided with the tensioning inclined planes 221 and is abutted against the inner circular wall of the outer ring 21 for supporting, and edges on the supporting end are provided with circular guide angles 224; one end of the tensioning member 24 close to the tensioning inclined surface 221 is provided with an arc-shaped slider 241, so that the tensioning member 24 can slide relative to the tensioning inclined surface 221 with low resistance; one end of the tightening member 24, which is far away from the tightening inclined surface 221, is provided with a rectangular abutting block 243 integrally arranged with the arc-shaped slider 241, the abutting block 243 is in sliding fit with the tightening hole 211, and one side of the abutting block 243, which is far away from the arc-shaped slider 241, is provided with a resistance increasing line 244 formed by a plurality of conical protrusions; the limiting side edges 245 at the extending positions of the junction of the abutting block 243 and the arc-shaped sliding block 241 to both sides are abutted with the inner circular wall of the outer ring 21, so that the protruding length of the abutting block 243 is limited, the abutting degree of the abutting block 243 on the sleeve workpiece on the outer ring 21 is further limited, and the effect of limiting the maximum torsion between the slip shaft and the sleeve workpiece is achieved; a rectangular mounting groove is formed in one side of the arc-shaped slider 241 close to the inner ring 22, and a magnetic reset piece 242 is fixedly inserted into the mounting groove, and the inner ring 22 is made of ferromagnetic material.

The implementation principle of the embodiment is as follows: the six expansion grooves 11 are pairwise positioned at two ends of the same symmetrical shaft of the end face of the main shaft 1 respectively, in the rotating process, the friction coefficients between the friction plates 13 at all positions and the slip ring 2 are the same, the influence of gravity on friction pieces in the expansion grooves 11 at the two ends of the same symmetrical shaft is just opposite, the positive pressure increased between the upper end friction plate 13 and the slip ring 2 and the reduced positive pressure between the lower end friction plate 13 and the slip ring 2 can be complemented with each other, and the interference of position change on the maximum static friction force between the main shaft 1 and the slip ring 2 can be effectively reduced; through the relative motion of the outer ring 21 and the inner ring 22, the tensioning member 24 is driven to move relatively to the tensioning inclined surface 221, so that the tensioning block protrudes out of the peripheral side of the outer ring 21 to effectively fix the sleeve part sleeved on the outer ring 21.

The embodiment of this specific implementation mode is the preferred embodiment of the present invention, not limit according to this the utility model discloses a protection scope, so: all equivalent changes made according to the structure, shape and principle of the utility model are covered within the protection scope of the utility model.

Claims

1. The utility model provides a convex key formula slippage axle, includes that main shaft (1) and cover establish slip ring (2) on main shaft (1), main shaft (1) week side is followed expansion tank (11) have been seted up to the length direction of main shaft (1), be provided with gasbag (12) in expansion tank (11), gasbag (12) with be provided with between slip ring (2) with main shaft (1) complex friction disc (13), its characterized in that slides: at least five expansion grooves (11) are formed in the main shaft (1), and the expansion grooves (11) are uniformly distributed in a circular array along the circumferential direction of the main shaft (1).

2. A keyed slip shaft according to claim 1 wherein: six expansion grooves (11) are formed in the main shaft (1).

3. A keyed slip shaft according to claim 1 wherein: the slip difference ring (2) comprises an outer ring (21), an inner ring (22) in running fit with the outer ring (21) and a fastening piece (23) used for fastening a sleeve type workpiece on the outer ring (21), the fastening piece (23) comprises a tensioning piece (24) and an elastic pretensioning piece (25) protruding out of the circumferential side plane of the outer ring (21) and capable of being pressed back into the outer ring (21), the inner ring (22) is provided with a tensioning inclined plane (221) which is matched with the tensioning piece (24) and is used for ejecting the tensioning piece (24) when relative movement in a certain direction occurs, the outer ring (21) is provided with a tensioning hole (211) and a pretensioning hole (212) corresponding to the tensioning piece (24) and the elastic pretensioning piece (25) respectively, and the tensioning piece (24) is in sliding fit with the tensioning hole (211).

4. A keyed slip shaft according to claim 3 wherein: the pre-tightening hole (212) is a counter bore, the elastic pre-tightening piece (25) comprises a pre-tightening sleeve (251) which is fixedly inserted into the pre-tightening hole (212) and has a T-shaped profile, an abutting ball (252) arranged in the pre-tightening sleeve (251) and a pre-tightening spring (253) abutted against the abutting ball (252), one end of the pre-tightening sleeve (251) far away from the pre-tightening spring (253) is provided with a first anti-falling ring (254) which is clamped with the abutting ball (252), one end of the pre-tightening sleeve (251) far away from the abutting ball (252) is provided with a second anti-falling ring (255) abutted against the end part of the pre-tightening spring (253), the abutting ball (252) protrudes out of the surface of the outer ring (21) without external force, the inner ring (22) is provided with a circular avoidance groove (222) matched with the pre-tightening sleeve (251) in a sliding mode, and the avoidance groove (222) is coaxial with the inner ring (22).

5. A keyed slip shaft according to claim 4 wherein: inner ring (22) week side be fixed with support section (223) of outer ring (21) butt, it cuts apart to dodge groove (222) support section (223), it is located to dodge groove (222) the central point of inner ring (22) puts.

6. A keyed slip shaft according to claim 5 wherein: the edge positions of the support section (223) and the abutting end of the outer ring (21) are provided with round lead angles (224).

7. A keyed slip shaft according to claim 3 wherein: an arc-shaped sliding block (241) is fixed on one side of the tensioning piece (24) close to the inner ring (22).

8. A keyed slip shaft according to claim 3 wherein: the inner ring (22) is a ferromagnetic circular ring, and a magnetic resetting piece (242) is fixed on one side of the tensioning piece (24) close to the inner ring (22).

9. A keyed slip shaft according to claim 3 wherein: and a butting block (243) which is in sliding fit with the tensioning hole (211) is fixed on one side, close to the tensioning hole (211), of the tensioning piece (24), and a resistance increasing line (244) is arranged on one side, far away from the inner ring (22), of the butting block (243).