CN210825327U

CN210825327U - Hysteresis lag constant torque rotary cap head for cap screwing machine

Info

Publication number: CN210825327U
Application number: CN201921455877.4U
Authority: CN
Inventors: 蓝景海
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-09-03
Filing date: 2019-09-03
Publication date: 2020-06-23
Anticipated expiration: 2029-09-03

Abstract

The utility model provides a hysteresis constant torque rotary cap head for cap screwing machine, which comprises a cap withdrawing mandril, wherein a connecting shaft thread sleeve, a screw head outer sleeve body, a spring component, a central fixed connecting shaft body and a rotary thread adjusting shaft are sequentially arranged at the annular outer end of the cap withdrawing mandril from top to bottom, the screw head outer sleeve body is arranged at the lower end of the connecting shaft thread sleeve, the central fixed connecting shaft body is arranged inside the connecting shaft thread sleeve, the spring component is arranged between the connecting shaft thread sleeve and the central fixed connecting shaft body, the rotary thread adjusting shaft is arranged inside the central fixed connecting shaft body and extends to the lower end of the central fixed connecting shaft body, a torsion adjusting sleeve is arranged at the annular outer end of the rotary thread adjusting shaft, a permanent magnet ring and a magnetic conductive ring are arranged between the annular outer end lower position of the central fixed connecting shaft body and the outer side wall of a torsion adjusting ring groove, the cap grabbing machine is accurate, the number of the components is reduced, and the cost is reduced.

Description

Hysteresis lag constant torque rotary cap head for cap screwing machine

Technical Field

The utility model relates to a permanent moment of torsion of magnetic hysteresis is turned round to capping machine head belongs to capping machine accessory technical field.

Background

The cap screwing machine is also called a cap sealing machine, a capping machine or a cap locking machine, is used for bottle cap screwing and unscrewing equipment after the split charging of plastic bottles and glass bottles, is one of main equipment of an automatic filling production line, and a cap screwing head is used as the most important part on the cap screwing machine and must ensure proper screwing torque during working. The torque is too small, and the bottle cap cannot be screwed tightly; the torque moment is too large, the bottle mouth and the bottle cap are easy to damage, the old-fashioned screw cap head has a plurality of comprehensive problems in the processes of rotation stopping, sealing, torsion and the like, and is restricted by the process level, the design concept and the parameter proportion, the old-fashioned screw cap head generates the reasons of uneven torque force, low precision and the like in the daily production, the bottle neck generates burrs and the like due to the fact that the bottle cap is not screwed, abraded, inclined and over-tightened, the product quality is influenced due to the produced inferior-quality products, the cost is increased unintentionally, the waste of the bottle cap, the bottle, water, electricity and materials is caused, and the productivity and the smoothness of a production line are reduced.

The constant-torque plane capping head mechanism disclosed in the Chinese patent with the publication number of CN203998877U comprises a cap withdrawing mandril, an adjusting mechanism, a clutch transmission mechanism and a central fixed connecting shaft body, wherein the adjusting mechanism, the clutch transmission mechanism and the central fixed connecting shaft body are sequentially sleeved on the cap withdrawing mandril, the adjusting mechanism comprises an adjusting lock nut, an upper spring seat, a compression spring and a lower spring seat, the adjusting mechanism and the central fixed connecting shaft body are sequentially arranged, the clutch transmission mechanism comprises a clutch friction plate contacted with the lower spring seat, a friction bearing seat contacted with the bottom of the clutch friction plate and a central fixed connecting shaft body of a capping shaft seat, the central fixed connecting shaft body comprises a capping shaft fixedly connected in the capping shaft seat, a capping head arranged at the tail end of the capping shaft and a plane capping head die connected at the bottom of the capping head, although the above patent achieves the pressure for adjusting the screwing force by adjusting the lock nut, the problem of the central, the cost is high.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a rotatory capping head of turning round of permanent moment of torsion of hysteresis lag for spiral cover machine to solve the structure of the spiral cover machine center fixed connection axis body of regulation spiral power size that proposes among the above-mentioned background art complicated, spare part is numerous, the problem that manufacturing cost is high, the utility model discloses grab the lid accuracy, do not have the locking, noiselessness, stability is high, and accurate arbitrary adjustable torsion improves the spiral cover quality, promotes quality and productivity, and energy saving and consumption reduction, and obviously simplifies, has reduced the spare part of constituteing, the cost is reduced.

In order to achieve the above purpose, the present invention is realized by the following technical solution: a hysteresis lag constant torque rotary cap head for a cap screwing machine comprises a cap withdrawing mandril, wherein a connecting shaft thread sleeve, a screw head outer sleeve body, a spring assembly, a central fixed connecting shaft body and a rotary thread adjusting shaft are sequentially arranged at the outer annular end of the cap withdrawing mandril from top to bottom, the screw head outer sleeve body is arranged at the lower end of the connecting shaft thread sleeve and extends into the connecting shaft thread sleeve, the central fixed connecting shaft body is arranged inside the connecting shaft thread sleeve and extends to the lower end of the connecting shaft thread sleeve, the spring assembly is arranged between the connecting shaft thread sleeve and the central fixed connecting shaft body, the rotary thread adjusting shaft is arranged inside the central fixed connecting shaft body and extends to the lower end of the central fixed connecting shaft body, a torque adjusting sleeve is arranged at the outer annular end of the rotary thread adjusting shaft, the torque adjusting sleeve is arranged at the lower end of the central fixed connecting shaft body and extends to the inside of the torque adjusting sleeve, the torque adjusting sleeve is arranged at the lower end of the screw head outer sleeve body, a permanent magnet ring and a magnetic conduction ring are arranged between the lower part of the annular outer end of the central fixed connecting shaft body and the outer side wall of the annular groove of the torsion adjusting ring, and a cover grabbing claw is installed at the lower end of the rotary thread adjusting shaft.

Further, move back lid ejector pin annular outer end installation position sleeve, move back lid ejector pin annular outer end fixed limiting plate and establish at the position sleeve lower extreme, the position sleeve outer end is established to narrow wide cylindrical down, the last narrow portion annular outer end suit stainless steel gasket of position sleeve, the upper end at the lower wide portion of position sleeve is installed to the stainless steel gasket, the stainless steel gasket is established between even axle thread bush and spiral head outer sleeve body, even the go-between that axle thread bush lower extreme extends down passes through the screw thread and is connected with spiral head outer sleeve body annular outer end upper portion position.

Further, the central fixed shaft body comprises a first ring body, a second ring body arranged at the lower end of the first ring body and a third ring body arranged at the lower end of the second ring body, the annular outer end of the first ring body is fixedly provided with a rotation stopping lubricating sleeve, the upper end of the rotation stopping lubricating sleeve is fixedly provided with a connecting ring, the upper connecting ring is arranged at the upper end of the first ring body and is connected with the first ring body through four bolts, the outer end of the upper connecting ring is attached to the annular inner wall of the outer sleeve body of the spiral head, three convex blocks are uniformly arranged at the outer end of the annular inner wall of the outer sleeve body of the spiral head and are in contact with the upper connecting ring, three grooves and three convex blocks are arranged inside the corresponding grooves, the annular inner wall of the outer sleeve body of the spiral head is fixedly provided with a limiting clamping ring, and the limiting clamping ring is arranged at the lower end.

Further, the fixed ring-shaped plate is arranged at the lower part of the first ring-shaped inner wall, the first ring-shaped inner wall is provided with a second bearing, the second bearing is arranged at the outer end of the cover withdrawing ejector rod in a ring shape and at the upper end of the second bearing, the first bearing is arranged at the lower end of the ring-shaped plate, the rotary thread adjusting shaft comprises an upper narrow ring and a lower wide ring fixed at the lower end of the upper narrow ring, the first bearing is arranged between the inner end of the second ring-shaped inner wall and the outer end of the upper narrow ring in a ring shape, the first bearing is arranged at the upper end of the lower wide ring, the annular groove is formed at the upper part of the outer end of the upper narrow ring in a ring shape, and a separation blade is clamped inside the annular groove and extends out of.

Further, spring unit includes compression spring and moves back the lid ejector pin spring, compression spring establishes in moving back the lid ejector pin spring outside, both ends respectively with limiting plate lower extreme and second bearing upper end contact about the compression spring, move back lid ejector pin spring upper and lower both ends respectively with stainless steel gasket lower extreme and second bearing upper end contact.

Further, the annular outer end of the lower wide ring of rotatory screw thread regulating spindle passes through screw thread installation torsion adjusting collar, annular groove is seted up to torsion adjusting collar upper end, the third ring body extends to the annular inslot portion, the annular outer end installation set screw of torsion adjusting collar, set screw runs through torsion adjusting collar and laminates with rotatory screw thread regulating spindle annular side, set screw passes through the screw thread and is connected with the torsion adjusting collar.

Furthermore, the permanent magnet ring is fixed to the outer annular end of the third ring body through a connecting block and is installed at the lower end of the second ring body, the magnetic conduction ring is fixed to the outer annular wall of the annular groove of the torsion adjusting sleeve, and the magnetic conduction ring is arranged on the outer side of the permanent magnet ring.

Furthermore, a magnetic conductive ring is fixed at the annular outer end of the third ring body, the magnetic conductive ring is installed at the lower end of the second ring body, the permanent magnet ring is fixed on the annular outer wall of the annular groove of the torsion adjusting sleeve, and the permanent magnet ring is arranged on the outer side of the magnetic conductive ring.

Furthermore, the magnetic conductive ring is a magnetic steel sleeve, the permanent magnetic ring comprises a plurality of rectangular magnetic strips, and the plurality of magnetic strips are vertically arranged and are annularly arranged.

The utility model has the advantages that: the utility model discloses a hysteresis lag constant torque rotary cap head for cap screwing machine, the utility model is provided with an inner permanent magnetic ring and an outer permanent magnetic ring, and the permanent magnetic ring and the magnetic conductive ring are respectively fixedly connected with a central fixed connecting shaft body and a torque force adjusting sleeve, because the central fixed connecting shaft body is connected with a rotator thread adjusting shaft bearing, the torque force adjusting sleeve is in threaded connection with the rotator thread adjusting shaft, the threaded connection can be in a shape of rotary motion and converted into linear motion, thereby realizing the adjustment of the staggered length of the permanent magnetic ring and the magnetic conductive ring by rotating the rotator thread adjusting shaft, thereby realizing the adjustment of the contact area of the permanent magnetic ring and the magnetic conductive ring, being convenient for adjusting the torque, the design is accurate in cap grabbing, has no locking, has no sound, has high stability, the torque force can be accurately and randomly adjusted, the quality of the cap screwing is improved, the quality and the productivity are improved, the energy is saved, the adjustment is more convenient, the structure is obviously simplified, the cost is reduced, and the working efficiency and the working quality are improved.

Drawings

Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments with reference to the following drawings:

fig. 1 is a schematic structural view of a magnetic hysteresis constant torque rotary screw capping head for a capping machine of the present invention;

fig. 2 is a schematic view of a hysteresis constant torque rotary button head inner center fixed connecting shaft body for a cap screwing machine of the present invention;

fig. 3 is a schematic view of an outer sleeve of an inner screw head of a hysteresis constant torque cap screwing machine of the present invention;

fig. 4 is a schematic view of the rotation-stopping lubricating sleeve in the magnetic hysteresis constant torque rotary cap head for the cap screwing machine of the present invention;

fig. 5 is a working principle diagram of the permanent magnetic ring and the magnetic conductive ring in the magnetic hysteresis constant torque rotary cap head for the cap screwing machine of the utility model.

In the figure: 1-cover withdrawing mandril, 2-connecting shaft thread bush, 3-screw head outer sleeve, 4-spring component, 5-rotation stopping lubricating sleeve, 6-center fixed connecting shaft body, 7-first bearing, 8-permanent magnet ring, 9-magnetic conductive ring, 10-torsion adjusting sleeve, 11-rotating thread adjusting shaft, 21-positioning sleeve, 22-stainless steel gasket, 31-limiting snap ring, 41-compression spring, 42-cover withdrawing mandril spring, 51-upper connecting ring, 61-first ring body, 62-second ring body, 63-third ring body, 101-limiting plate, 102-fixing screw, 111-cover grasping claw and 611-annular plate.

Detailed Description

In order to make the technical means, creation features, achievement purposes and functions of the present invention easy to understand, the present invention is further described below with reference to the following embodiments.

Referring to fig. 1-5, the present invention provides a technical solution: a hysteresis constant torque rotary cap head for a cap screwing machine comprises a cap withdrawing ejector rod 1, wherein a connecting shaft threaded sleeve 2, a screw head outer sleeve body 3, a spring component 4, a central fixed connecting shaft body 6 and a rotary screw thread adjusting shaft 11 are sequentially arranged at the annular outer end of the cap withdrawing ejector rod 1 from top to bottom, the screw head outer sleeve body 3 is arranged at the lower end of the connecting shaft threaded sleeve 2 and extends into the connecting shaft threaded sleeve 2, the central fixed connecting shaft body 6 is arranged in the connecting shaft threaded sleeve 2 and extends to the lower end of the connecting shaft threaded sleeve 2, the spring component 4 is arranged between the connecting shaft threaded sleeve 2 and the central fixed connecting shaft body 6, the rotary screw thread adjusting shaft 11 is arranged in the central fixed connecting shaft body 6 and extends to the lower end of the central fixed connecting shaft body 6, a torque adjusting sleeve 10 is arranged at the annular outer end of the rotary screw thread adjusting shaft 11, the torque adjusting sleeve 10 is arranged at the lower end of the central fixed connecting shaft body 6 and extends into, the torsion adjusting sleeve 10 is installed at the lower end of the screw head outer sleeve body 3 and extends to the inside of the screw head outer sleeve body 3, a permanent magnet ring 8 and a magnetic conductive ring 9 are arranged between the lower position of the annular outer end of the central fixed connecting shaft body 6 and the outer side wall of the annular groove of the torsion adjusting sleeve 10, the cover grabbing claw 111 is installed at the lower end of the rotary thread adjusting shaft 11, the rotary body thread adjusting shaft 11 is in threaded connection with the cover grabbing claw 111, and the cover grabbing claw 111 and the rotary thread adjusting shaft 11 are convenient to install and detach.

Specifically, the magnetic wire reflection principle position N reflects the magnetic conductive ring and refracts back to S, so that the torque generated by the curve principle is adjusted by the contact area of the permanent magnetic ring 8 and the magnetic conductive ring 9, the larger the contact area is, the larger the torque force is, the smaller the torque force is, and the contact size of the adjustment area is adjusted axially up and down by the torque adjustment sleeve 10 and the rotary thread adjustment shaft 11.

Move back 1 annular outer end installation position sleeve 21 of lid ejector pin, move back fixed limiting plate 101 of 1 annular outer end of lid ejector pin and limiting plate 101 and establish at the position sleeve 21 lower extreme, be convenient for carry on spacingly to the position sleeve 21, the position sleeve 21 outer end is established to the cylindrical of width under the narrow, the last narrow annular outer end suit stainless steel gasket 22 of position sleeve 21, stainless steel gasket 22 installs the upper end at the lower wide portion of position sleeve 21, stainless steel gasket 22 establishes between even axle thread bush 2 and spiral head overcoat body 3, the go-between that even axle thread bush 2 lower extreme extends down passes through the screw thread and is connected with spiral head overcoat body 3 annular outer end upper portion positions, specifically, be convenient for even axle thread bush 2, move back the location connection of lid ejector pin 1 and spiral head overcoat body 3.

The central fixed connecting shaft body 6 comprises a first ring body 61, a second ring body 62 arranged at the lower end of the first ring body 61 and a third ring body 63 arranged at the lower end of the second ring body 62, the annular outer end of the first ring body 61 is fixedly provided with a rotation-stopping lubricating sleeve 5, the upper end of the rotation-stopping lubricating sleeve 5 is fixedly provided with an upper connecting ring 51, the upper connecting ring 51 is arranged at the upper end of the first ring body 61, the upper connecting ring 51 is connected with the first ring body 61 through four bolts, the annular outer end of the upper connecting ring 51 is attached to the annular inner wall of the spiral head outer sleeve body 3, the annular outer end of the upper connecting ring 51 is uniformly provided with three convex blocks, three grooves are uniformly formed at the contact positions of the annular inner wall of the spiral head outer sleeve body 3 and the upper connecting ring 51, the three convex blocks are arranged in the corresponding grooves, the annular inner wall of the spiral head outer sleeve body 3 is fixedly provided with, establish inside the recess through the lug, prevent to spline lubricated cover 5 and spiral head outer body 3 and take place relative rotation, again because spline lubricated cover 5 and first ring body 61 fixed connection, so can prevent that central fixed connection axle body 6 and spiral head outer body 3 from taking place relative rotation.

A ring-shaped plate 611 is fixed at the lower part of the annular inner wall of the first ring body 61, a second bearing is arranged on the annular inner wall of the first ring body 61, the second bearing is arranged at the outer end of the annular ejector rod 1 for cap withdrawing, the upper end of the annular plate 611 is arranged on the second bearing, the central fixed connecting shaft body 6 is conveniently connected with the cap withdrawing ejector rod 1, a first bearing 7 is arranged at the lower end of the annular plate 611, the rotary thread adjusting shaft 11 comprises an upper narrow ring and a lower wide ring fixed at the lower end of the upper narrow ring, the first bearing 7 is arranged between the annular inner wall of the second ring body 62 and the annular outer end of the upper narrow ring, the first bearing 7 is arranged at the upper end of the lower wide ring, an annular groove is arranged at the upper part of the annular outer end of the upper narrow ring, a blocking piece is clamped inside the annular groove, the blocking piece extends out of the annular outer end of the upper narrow ring and is arranged, the separation blade and the lower wide ring of the rotary thread adjusting shaft 11 respectively limit the upper and lower positions of the first bearing 7, so that the first bearing 7 can be conveniently positioned and installed.

Spring unit 4 includes compression spring 41 and moves back lid ejector pin spring 42, and compression spring 41 establishes in moving back the lid ejector pin spring 42 outside, and both ends contact with limiting plate 101 lower extreme and second bearing upper end respectively about compression spring 41, move back lid ejector pin spring 42 about both ends respectively with stainless steel gasket 22 lower extreme and second bearing upper end contact, and compression spring 41 and move back lid ejector pin spring 42 can compress, the activity from top to bottom of being convenient for.

The annular outer end of the lower wide circular ring of the rotary thread adjusting shaft 11 is provided with a torsion adjusting sleeve 10 through threads, the upper end of the torsion adjusting sleeve 10 is provided with an annular groove, the third ring body 63 extends to the inside of the annular groove, the annular outer end of the torsion adjusting sleeve 10 is provided with a fixing screw 102, the fixing screw 102 penetrates through the torsion adjusting sleeve 10 and is attached to the annular side end of the rotary thread adjusting shaft 11, the fixing screw 102 is connected with the torsion adjusting sleeve 10 through threads, specifically, the relative position of the torsion adjusting sleeve 10 on the rotary thread adjusting shaft 11 is convenient to adjust through thread installation, the fixing screw 102 is convenient to further fasten the torsion adjusting sleeve 10 and the rotary thread adjusting shaft 11 after the torsion adjusting sleeve 10 is adjusted to a proper position, and the connection tightness is improved.

The permanent magnetism ring 8 is fixed through the connecting block to third ring body 63 annular outer end, and permanent magnetism ring 8 is installed at second ring body 62 lower extreme, and magnetic conduction ring 9 is fixed on the annular outer wall in the cyclic annular groove of torsion adjusting sleeve 10, and magnetic conduction ring 9 is established in the permanent magnetism ring 8 outside, and permanent magnetism ring 8 is established in magnetic conduction ring 9 inboard, as the utility model discloses an embodiment.

The fixed magnetic conduction circle 9 of third ring body 63 annular outer end, magnetic conduction circle 9 are installed at second ring body 62 lower extreme, and permanent magnetism ring 8 is fixed on the annular outer wall in the cyclic annular groove of torsion adjusting sleeve 10, and permanent magnetism ring 8 is established in the magnetic conduction circle 9 outside, and magnetic conduction circle 9 is established at permanent magnetism ring 8 inboardly, as an embodiment of the utility model.

The magnetic conductive ring 9 is a magnetic steel sleeve, the permanent magnet ring 8 comprises a plurality of rectangular magnetic strips, the magnetic strips are vertically arranged and annularly arranged, specifically, 50-60 magnetic strips are combined with the magnetic ring-shaped permanent magnet ring 8, a gap of 5-7mm is formed between the permanent magnet ring 8 and the magnetic conductive ring 9, and NS linear repulsion and attraction of the permanent magnet ring 8 and the magnetic conductive ring 9 generate torque force.

The working principle is as follows: the permanent magnet ring 8 and the magnetic conductive ring 9 form an inner ring and an outer ring, the permanent magnet ring 8 can be arranged at the inner side of the magnetic conductive ring 9, the magnetic conductive ring 9 can be arranged at the inner side of the permanent magnet ring 8, the positions of the permanent magnet ring and the magnetic conductive ring can be interchanged, the magnetic conductive ring 9 is a steel magnetic sleeve, the permanent magnet ring 8 can be an integral ring body or a magnetic ring formed by combining 50-60 magnetic strips, the magnetism of the permanent magnet ring 8 can charge the magnetic conductive ring 9, the magnetic conductive ring 9 does not contain magnetism, special magnetic materials in the magnetic conductive ring 9 can attract and repel the magnetism N/S, the magnetic conductive ring 9 is made of ALNiCo2, in other words, the magnetic line reflection principle is that the N reflection magnetic conductive ring 9 of the permanent magnet ring 8 refracts back to the S of the permanent magnet ring 8, the torque generated by the curve principle is adjusted by the contact area of the permanent magnet ring 8 and the magnetic conductive ring 9, the larger the, the external permanent magnet ring is fixedly connected with the inner wall of the torque adjusting sleeve 10, the rotating thread adjusting shaft 11 is fixedly connected with the torque adjusting sleeve 10 through threads, so that the contact size of the adjusting area is axially adjusted up and down by the torque adjusting sleeve 10 and the rotating thread adjusting shaft 11, a person unscrews the fixing screw 102 and then rotates the torque adjusting sleeve 10, and due to the threaded connection relationship between the torque adjusting sleeve 10 and the rotating thread adjusting shaft 11, the torque adjusting sleeve 10 rotates and rotates downwards at the same time, so as to drive the permanent magnet ring 8 or the magnetic conductive ring 9 fixedly connected with the annular inner wall of the torque adjusting sleeve 10 to move downwards relative to the central fixed connecting shaft body 6, so as to adjust the staggered distance between the permanent magnet ring 8 and the magnetic conductive ring 9, namely, the contact area between the permanent magnet ring 8 and the magnetic conductive ring 9 is adjusted, and the larger the staggered distance is, the smaller the contact area between the permanent magnet, otherwise the torsional force is bigger, so that the magnitude of the torsional force is adjusted, the design is accurate in cover grabbing, free of locking, free of sound, high in stability, accurate and freely adjustable in torsion, the quality of the screw cover is improved, the quality and the productivity are improved, energy is saved, consumption is reduced, the cost is reduced, the adjustment is more convenient, the structure is obviously simplified, the cost is reduced, and the working efficiency and the working quality are improved.

The basic principles and the main features of the invention and the advantages of the invention have been shown and described above, it will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, but that the invention may be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims

1. The utility model provides a permanent moment of torsion of magnetic hysteresis lag is rotatory to be covered head for spiral cover machine, is including moving back lid ejector pin (1), its characterized in that: move back and cover ejector pin (1) annular outer end from top to bottom install axle thread bush (2), spiral head outer sleeve (3), spring unit (4), central fixed axle body (6) and rotatory screw thread adjusting spindle (11) in proper order, spiral head outer sleeve (3) are established and are being linked axle thread bush (2) lower extreme and extend to even axle thread bush (2) inside even, establish at axle thread bush (2) inside and extend to even axle thread bush (2) lower extreme in central fixed axle body (6) even, spring unit (4) are established and are being linked between axle thread bush (2) and central fixed axle body (6), rotatory screw thread adjusting spindle (11) are installed and are being linked axle body (6) inside and extend to central fixed axle body (6) lower extreme in center, rotatory screw thread adjusting spindle (11) annular outer end installation torsion adjusting collar (10), torsion adjusting collar (10) are installed and are being linked axle body (6) lower extreme and central fixed axle body (6) down at central fixed axle body (6) lower extreme and are installed in central fixed axle body The end extends to the torsion adjusting sleeve (10) inside, the torsion adjusting sleeve (10) is installed at the screw head outer sleeve body (3) lower extreme and extends to the screw head outer sleeve body (3) inside, be equipped with between central fixed axis body (6) annular outer end lower part position and torsion adjusting sleeve (10) ring channel lateral wall permanent magnetic ring (8) and magnetic conductive ring (9), lid claw (111) are grabbed in rotatory screw thread adjusting shaft (11) lower extreme installation.

2. The hysteresis constant torque rotary torque capping head for the capping machine according to claim 1, wherein: move back and cover ejector pin (1) annular outer end installation position sleeve (21), move back and cover ejector pin (1) annular outer end fixed limiting plate (101) and establish at position sleeve (21) lower extreme, wide cylindrical under establishing for the upper narrow portion in position sleeve (21) outer end, last narrow portion annular outer end suit stainless steel gasket (22) of position sleeve (21), the upper end at the lower wide portion of position sleeve (21) is installed in stainless steel gasket (22), establish between even axle thread bush (2) and spiral head outer sleeve body (3) stainless steel gasket (22), the go-between that even axle thread bush (2) lower extreme extends down passes through the screw thread and is connected with spiral head outer sleeve body (3) annular outer end upper portion position.

3. The hysteresis constant torque rotary torque capping head for the capping machine according to claim 1, wherein: the central fixed connecting shaft body (6) comprises a first ring body (61), a second ring body (62) arranged at the lower end of the first ring body (61) and a third ring body (63) arranged at the lower end of the second ring body (62), the annular outer end of the first ring body (61) is fixedly provided with a rotation stopping lubricating sleeve (5), the upper end of the rotation stopping lubricating sleeve (5) is fixedly provided with an upper connecting ring (51), the upper connecting ring (51) is arranged at the upper end of the first ring body (61), the upper connecting ring (51) is connected with the first ring body (61) through four bolts, the annular outer end of the upper connecting ring (51) is attached to the annular inner wall of the screw head outer sleeve body (3), the annular outer end of the upper connecting ring (51) is uniformly provided with three convex blocks, the contact positions of the annular inner wall of the screw head outer sleeve body (3) and the upper connecting ring (51) are uniformly provided with three grooves, and the three, the spiral head outer sleeve body (3) is characterized in that a limiting snap ring (31) is fixed on the annular inner wall of the spiral head outer sleeve body, and the limiting snap ring (31) is installed at the lower end of the rotation stopping lubricating sleeve (5) and arranged at the annular outer end of the central fixed connecting shaft body (6).

4. The hysteresis constant torque rotary torque capping head for the capping machine according to claim 3, wherein: the fixed annular plate (611) is arranged at the lower part of the annular inner wall of the first ring body (61), a second bearing is arranged on the annular inner wall of the first ring body (61), the second bearing is arranged at the outer annular end of the cover withdrawing ejector rod (1) and the upper end of the second bearing installation annular plate (611), a first bearing (7) is arranged at the lower end of the annular plate (611), the rotary thread adjusting shaft (11) comprises an upper narrow ring and a lower wide ring fixed at the lower end of the upper narrow ring, the first bearing (7) is arranged between the inner annular wall of the second ring body (62) and the outer annular end of the upper narrow ring, the first bearing (7) is arranged at the upper end of the lower wide ring, the annular groove is formed in the upper part of the outer annular end of the upper narrow ring, and a blocking piece is arranged inside the annular groove and extends out of the outer annular end of the upper narrow ring and is arranged at.

5. A hysteresis constant torque rotary twisting cap head for cap screwing machine according to claim 1, 2 or 4, characterized in that: spring unit (4) are including compression spring (41) and move back and are covered ejector pin spring (42), establish in moving back and cover ejector pin spring (42) the outside compression spring (41), both ends respectively with limiting plate (101) lower extreme and second bearing upper end contact about compression spring (41), move back and cover ejector pin spring (42) upper and lower both ends respectively with stainless steel gasket (22) lower extreme and second bearing upper end contact.

6. The hysteresis constant torque rotary torque capping head for the capping machine according to claim 4, wherein: the lower wide annular outer end of the rotary thread adjusting shaft (11) is provided with a torsion adjusting sleeve (10) through threads, an annular groove is formed in the upper end of the torsion adjusting sleeve (10), the third ring body (63) extends to the inside of the annular groove, a fixing screw (102) is arranged at the annular outer end of the torsion adjusting sleeve (10), the fixing screw (102) penetrates through the torsion adjusting sleeve (10) and is attached to the annular side end of the rotary thread adjusting shaft (11), and the fixing screw (102) is connected with the torsion adjusting sleeve (10) through threads.

7. The hysteresis constant torque rotary torque capping head for the capping machine according to claim 6, wherein: the outer end of the third ring body (63) is fixed with a permanent magnet ring (8) through a connecting block, the permanent magnet ring (8) is installed at the lower end of the second ring body (62), the magnetic conductive ring (9) is fixed on the outer wall of the annular groove of the torsion adjusting sleeve (10), and the magnetic conductive ring (9) is arranged on the outer side of the permanent magnet ring (8).

8. The hysteresis constant torque rotary torque capping head for the capping machine according to claim 6, wherein: the outer end of the third ring body (63) is fixed with a magnetic conductive ring (9), the magnetic conductive ring (9) is installed at the lower end of the second ring body (62), the permanent magnetic ring (8) is fixed on the outer wall of the annular groove of the torsion adjusting sleeve (10), and the permanent magnetic ring (8) is arranged on the outer side of the magnetic conductive ring (9).

9. The hysteresis constant torque rotary torque capping head for the capping machine according to claim 1, wherein: the magnetic conductive ring (9) is a magnetic steel sleeve, the permanent magnetic ring (8) comprises a plurality of rectangular magnetic strips, and the magnetic strips are vertically arranged and are annularly arranged.