CN101327675A

CN101327675A - Automatic expansion shaft

Info

Publication number: CN101327675A
Application number: CNA200810150507XA
Authority: CN
Inventors: 徐宏伟
Original assignee: Xian University of Technology
Current assignee: Xian University of Technology
Priority date: 2008-07-31
Filing date: 2008-07-31
Publication date: 2008-12-24
Anticipated expiration: 2028-07-31
Also published as: CN100572055C

Abstract

The invention discloses an automatic expansion shaft which comprises a self-expansion part and a driving part. The self-expansion part comprises a sleeve. The circumference of the sleeve is symmetrically provided with a plurality of continuous grooves along axial direction. The sleeve is connected with a grooved sheave. A nut is arranged in the sleeve. The external circumference of the nut is an oblique cone plane. Sliding trays corresponding to the continuous grooves are arranged on the oblique cone plane of the nut. An expansion flake is arranged on every sliding tray. The external end surface of the expansion flake towards the external circumference is a lug boss which passes through the continuous grooves. The expansion flake is connected with the inner wall of the sleeve through a spring. The grooved sheave of the self-expansion part is connected with a positioning plate in a switching way. The positioning plate is connected with an electromagnetic valve. The electromagnetic valve and a DC electric machine are all connected with a control system. The automatic expansion shaft has the advantages of simple structure and using reliability, uses an electric actuator for replacing the manual ballooning operation and saves a compressed air source unit, thereby realizing the total automation from paper rolling to loading and unloading.

Description

Automatic expansion shaft

Technical field

The invention belongs to the printing mechanism technical field, relate to the paper web erecting device in the printing paper making equipment, be specifically related to a kind of automatic expansion shaft.

Background technology

For the roll type printing machine, the installation of paper web and fixing inevitable, present printing machine is general adopt paper web is installed in axle and goes up after, compress with gland and to fix paper web.This method labour intensity is big, and efficient is low; Type that some are advanced and external roll type printing machine adopt the inflatable axle to fix paper web more, and this has reduced working strength of workers to a certain extent, has improved operating efficiency, but still exists following shortcoming: the one, and the inflatable axle needs source of the gas; It two is owing to need manually to go up gas, so difficult automation mechanized operation, the inefficiency realized.Develop a kind of new automatic expansion shaft device, solve the defective of above-mentioned inflatable axle, improved operating efficiency further, reduce working strength of workers, become a technical problem of being badly in need of solution.

Summary of the invention

The purpose of this invention is to provide a kind of automatic expansion shaft, solved existing inflatable axle and relied on source of the gas, and need to go up manually the problem of gas.

Technical scheme of the present invention is, a kind of automatic expansion shaft, comprise leading screw, the two ends of leading screw are respectively arranged with from part and the drive part of expanding, and drive part comprises the transmission device that is driven by direct current generator, is used to drive the rotation of leading screw, described from the bloated sleeve that partly comprises, on the circumference of sleeve vertically symmetry have some grooves, the two ends of sleeve are connected with leading screw by radial bearing, at the coaxial sheave that is fixedly connected with of an end of sleeve; The inside of sleeve is provided with the screw that is connected with leading screw, the excircle of screw is scalene cone, the scalene cone of screw is provided with the sliding tray corresponding with each groove, each sliding tray is provided with a bloated sheet, the bloated sheet outer face of circumference outward is a boss, the boss of bloated sheet passes groove, and the sheet that expands is connected by spring with the inwall of sleeve; Described sheave adopts the folding mode to be connected with location-plate, and location-plate is connected with magnetic valve; Described magnetic valve all is connected with control system with direct current generator.

Characteristics of the present invention also are,

The height of boss is greater than the wall thickness of sleeve and the spring height sum after by compression.

Transmission device comprises friction pulley and the driven pulley with the coaxial setting of leading screw, and driven pulley contacts with friction pulley maintenance face by stage clip, and driven pulley is connected with the drive of direct current generator by driving-belt.

Location-plate is hinged on the fixed rotating shaft and can rotates around fixed rotating shaft, and the other end of location-plate is provided with chute, and location-plate is hinged by the piston rod of this chute and magnetic valve.

The invention has the beneficial effects as follows, neither need source of the gas and relevant equipment, and simple in structure, and operation has alleviated working strength of workers greatly easily, has improved operating efficiency.

Description of drawings

Fig. 1 is the structural representation of automatic expansion shaft of the present invention;

Fig. 2 is from the A-A cutaway view partly that expands among Fig. 1;

Fig. 3 is the structural representation of sheet at the swelling state that expand among the present invention;

Fig. 4 is the structural representation of sheet at relaxation state that expand among the present invention.

Among the figure, 1. leading screw is 2. adjusted nut, 3. thrust bearing, 4. stage clip, 5. wallboard, 6. magnetic valve, 7. location-plate, 8. sheave, 9. sleeve, the sheet that 10. expands, 11. screws, 12. radial bearing, 13. direct current generators, 14. drives, 15. driving-belts, 16. friction pulley, 17. driven pulleys, 18. springs, 19. grooves, 20. groove, 21. sliding trays, 22. fixed rotating shafts, 23. boss.

The specific embodiment

The present invention is described in detail below in conjunction with the drawings and specific embodiments.

Fig. 1 is the structural representation of automatic expansion shaft of the present invention.Comprise that the end that drive part is arranged on leading screw 1 is a driving end from part and the drive part of expanding, be used to realize the rotation of bloated axle certainly.Drive part comprises leading screw 1, leading screw 1 passes wallboard 5 and installs, the coaxial friction pulley 16 that is installed with on the leading screw 1, also be coaxially installed with driven pulley free to rotate 17 on the leading screw 1, driven pulley 17 contacts with friction pulley 16 maintenance faces by stage clip 4, and driven pulley 17 is connected with the drive 14 of direct current generator 13 by driving-belt 15.On leading screw 1, also be coaxially installed with thrust bearing 3 and adjust nut 2, this is convenient to adjust the tension force of paper, also guarantee in addition can not produce during the swelling paper web and burn electrical fault because of load is excessive at automatic expansion shaft, when load is excessive, friction pulley 16 can and driven pulley 17 skid.And the adhesion between friction pulley 16 and the driven pulley 17 is exactly to adjust the frictional force that spring guarantees by adjusting nut 2.Thrust bearing 3 is that the rotation with respect to leading screw can not take place because of the power of spring nut 2 when guaranteeing that spring does not rotate with leading screw 1.The other end that is arranged on leading screw 1 from the part that expands is the operating side, and the swelling that is used to realize paper web is fixed and loosened.Comprise sleeve 9 from the part that expands, on the circumference of sleeve 9 vertically symmetry have some grooves 20, the two ends of sleeve 9 are connected with leading screw 1 by radial bearing 12, at the coaxial sheave 8 that is fixedly connected with of an end of sleeve 9; The inside of sleeve 9 is provided with the screw 11 that is connected with leading screw 1, the excircle of screw 11 is scalene cone, the scalene cone of screw 11 is provided with the sliding tray 21 corresponding with each groove 20, each sliding tray 21 is provided with a bloated sheet 10, bloated sheet 10 outer face of circumference outward is a boss 23, the inner face of sheet 10 towards the axle center that expand is an inclined-plane, the boss 23 of bloated sheet 10 passes groove 20, the two ends of bloated sheet 10 are provided with the spring mounting platform, and this spring mounting platform is connected by spring 18 with the inwall of sleeve 9.

Sheave 8 from the part that expands adopts the folding mode to be connected with an end (hereinafter to be referred as dog point) of location-plate 7, location-plate 7 is hinged on the fixed rotating shaft 22 and can rotates around fixed rotating shaft 22, the other end of location-plate 7 is provided with chute (hereinafter to be referred as traction end), the piston rod of this traction end and magnetic valve 6 is movably hinged, and magnetic valve 6 is fixed on the wallboard 5.

Fig. 2 is from the A-A cutaway view partly that expands among Fig. 1.Sleeve 9 is fixedlyed connected with sheave 8, has some grooves 19 on the circumference of sheave 8, and groove 19 is used for snapping in of location-plate 7 dog points; On the circumference of sleeve 9 vertically symmetry have four grooves 20, be installed with the boss 23 of the sheet 10 that expands in each groove 20; Screw 11 is connected with leading screw 1, and the scalene cone of screw 11 is provided with the sliding tray 21 corresponding with four grooves 20, and the inner face of the sheet 10 that expands is installed in the sliding tray 21.

Fig. 3 is the structural representation of sheet at the swelling state that expand among the present invention, leading screw 1 drives screw 11 forward rotation, because the sliding tray 21 on the screw 11 is surface grooves, and the boss 23 of the sheet 10 that expands is subjected to groove 20 restrictions of sleeve 9, make bloated sheet 10 not move horizontally with screw 11, so the F direction translation of screw 11 in figure, the sheet 10 that expands is just outwards ejected by screw 11, boss 23 just stretches out groove 20 and exceeds the outer circumference surface of sleeve 9, thus the swelling paper web.H is the height of boss 23 among the figure, h is the wall thickness of sleeve 9, the height H of boss 23 must be greater than the wall thickness h of sleeve 9 and the spring 18 height sum after by compression, could guarantee that the outer circumference surface of boss 23 when spring 18 is subjected to expand sheet 10 compressions exceeds the outer circumference surface of sleeve 9, realizes pushing up and the swelling paper web.

Fig. 4 is the structural representation of sheet at relaxation state that expand among the present invention, control leading screw 1 backward rotation, screw 11 moves the roof pressure of releasing to the sheet 10 that expands along E direction among the figure, the sheet 10 that expands shrinks to the axle center under the effect of spring 18, the outer circumference surface of boss 23 is lower than the outer circumference surface of sleeve 9, just can change paper web.

The course of work of automatic expansion shaft of the present invention is:

When needs swelling paper web, earlier paper web is installed on the sleeve 9.Give magnetic valve 6 energisings, draw the traction end of location-plate 7 on the piston rod of magnetic valve 6, thereby the dog point that drives location-plate 7 snaps in the groove 19 of sheave 8, the rotation of restriction sleeve 9, meanwhile drive part drives leading screw 1 rotation, because sleeve can not rotate for 9 this moments, and be installed with the sheet 10 that expands in the groove 20 of sleeve 9, the sheet 10 that expands makes screw 11 not rotate, screw 11 is to the translation of F direction (as the F moving direction of Fig. 3) under the rotation of leading screw 1, the boss 23 of sheet 10 is just ejected by screw 11 so expand, thus the swelling paper web.Behind the swelling paper web, direct current generator 13 loads strengthen, and the driven pulley 17 and the friction pulley 16 of drive part will skid.Postpone the bloated sheet of regular hour assurance swelling paper web reliably by control system, control system is about to magnetic valve 6 outages then, the piston rod of magnetic valve 6 moves down depresses traction end, the dog point of location-plate 7 is just thrown off from the groove 19 of sheave 8, driven pulley 17 drives friction pulleys 16 leading screws 1 normal rotation, and the paper web that leading screw 1 just drives sleeve 9 and swelling rotates puts paper or collection operation normally.

When needs take off paper web, stop the rotation of leading screw 1 and paper web earlier, give magnetic valve 6 energisings, piston rod by magnetic valve 6 shrinks the traction end of lifting location-plate 7, the dog point of location-plate 7 is snapped in the groove 19 on the sheave 8 fix sleeve 9, this timed unit makes leading screw 1 backward rotation, screw 11 oppositely moves (as the E direction among Fig. 4) and unclamps the jack-up of sheet 10 of expanding, the sheet 10 that expands is withdrawn to the axle center under the effect of spring 18, the boss 23 of bloated sheet 10 loosens the swelling to paper web, and at this moment paper web just can be removed easily.

The structure of automatic expansion shaft of the present invention has compared with prior art cut compressed air source unit, uses electronic dress Put the artificial inflatable operation of replacement, utilize the ready-made motor that unreels or unreel to realize that paper roll is in the roll type printing Installing and fixing and loose winding on the machine is conducive to realize loading and unloading the automated job of paper roll, makes in the sleeve The swollen automatic swelling of sheet and loosen paper roll, thus the realization paper roll loads and unloads completely automation.

Claims

1, a kind of automatic expansion shaft comprises leading screw (1), and the two ends of leading screw (1) are respectively arranged with from part and the drive part of expanding, and drive part comprises the transmission device that is driven by direct current generator (13), is used to drive the rotation of leading screw (1), it is characterized in that:

Describedly comprise sleeve (9) from the part that expands, on the circumference of sleeve (9) vertically symmetry have some grooves (20), the two ends of sleeve (9) are connected with leading screw (1) by radial bearing (12), at the coaxial sheave (8) that is fixedly connected with of an end of sleeve (9); The inside of sleeve (9) is provided with the screw (11) that is connected with leading screw (1), the excircle of screw (11) is scalene cone, the scalene cone of screw (11) is provided with the sliding tray (21) corresponding with each groove (20), each sliding tray (21) is provided with a bloated sheet (10), bloated sheet (10) outer face of circumference outward is a boss (23), the boss (23) of bloated sheet (10) passes groove (20), and the sheet (10) that expands is connected by spring (18) with the inwall of sleeve (9);

Described sheave (8) adopts the folding mode to be connected with location-plate (7), and location-plate (7) is connected with magnetic valve (6); Described magnetic valve (6) all is connected with control system with direct current generator (13).

2, automatic expansion shaft as claimed in claim 1 is characterized in that: the height of described boss (23) is greater than the wall thickness of sleeve (9) and spring (18) the height sum after by compression.

3, automatic expansion shaft as claimed in claim 1, it is characterized in that: described transmission device comprises friction pulley (16) and the driven pulley (17) with the coaxial setting of leading screw (1), driven pulley (17) contacts with friction pulley (16) maintenance face by stage clip (4), and driven pulley (17) is connected with the drive (14) of direct current generator (13) by driving-belt (15).

4, automatic expansion shaft as claimed in claim 1, it is characterized in that: described location-plate (7) is hinged on fixed rotating shaft (22) and goes up and can rotate around fixed rotating shaft (22), the other end of location-plate (7) is provided with chute, and location-plate (7) is hinged by the piston rod of this chute and magnetic valve (6).