Slip shaft

Abstract

The utility model relates to a slip shaft, in particular to a slip shaft, which comprises a plurality of groups of slip ring holders, expansion sheet jacking piston seats are fixedly mounted in the plurality of slip ring holders, movable grooves are formed in the expansion sheet jacking piston seats, expansion sheet jacking pistons are slidably connected in the movable grooves, and the expansion sheet jacking piston seats are fixedly mounted in the expansion sheet jacking piston seats. A movable block is fixedly installed at the end of the expansion piece jacking piston, a slip ring expansion piece is rotationally connected to the surface of the slip ring holding frame, the movable block is attached to the surface of the slip ring expansion piece, radial tensioning of a tension generation source of an original structure is improved to be axial tensioning, and the situation that in the using process, after a tension generation piston seat in the original structure rotates, the slip ring expansion piece is tightly attached to the surface of the slip ring holding frame is avoided. The tension of the slip ring under the same air pressure is improved, compared with an original structure, the strength of the shaft core is enhanced to a certain degree, the air holes of the shaft core can be symmetrically distributed, and the runout degree of the shaft in the using process is reduced.

Description

Technical Field

[0001] The utility model relates to a slip differential shaft, in particular to a slip differential shaft. Background Art

[0002] The slitting machine is a device that slits a roll of web material into multiple rolls, and it is widely used. The differential shaft is usually used for the reel of the slitting machine, and is also used for the unwinding shaft in special occasions. The purpose is to use the principle of slipping of each differential ring on the differential shaft to manipulate the tension adjustment of the material during the rewinding process, so that multiple reels on the shaft can always be rewound and unwound on the shaft evenly, neatly and with constant tension from the core to the outer layer. The appropriate tension of all reels is maintained during the operation of the reel to ensure the highest reel quality. The application of the differential shaft effectively improves the speed, rewinding accuracy and automation of the slitting machine.

[0003] At present, differential shafts can be divided into four types: central air pressure type, pneumatic side pressure type, mechanical side pressure type and gas expansion type. However, the existing differential shaft structure is often complex, expensive, and difficult to process. Only companies specializing in the production of differential shafts can produce them. Utility Model Content

[0004] The main purpose of the utility model is to solve the problem that the slip differential shaft structure is often complicated, expensive and difficult to process.

[0005] In order to achieve the above-mentioned purpose, according to one aspect of the utility model, a differential shaft is provided, including a differential ring retainer, the differential ring retainer is arranged in multiple groups, and a plurality of differential ring retainers are fixedly installed with an expansion plate pushing piston seat inside, a movable groove is opened inside the expansion plate pushing piston seat, an expansion plate pushing piston is slidably connected inside the movable groove, a moving block is fixedly installed on the end of the expansion plate pushing piston, the differential ring retainer surface is rotatably connected with a differential ring expansion plate, and the moving block is in contact with the surface of the differential ring expansion plate.

[0006] Furthermore, the lower surface of the differential ring expansion piece and one side of the upper surface of the moving block are arranged to be inclined, the inclined part of the differential ring expansion piece fits the inclined part of the moving block, and the inclination angle of the inclined part of the moving block is consistent with the inclination angle of the inclined part of the differential ring expansion piece.

[0007] Furthermore, a moving groove is provided on one side of the differential ring retainer close to the movable groove, and the moving block is slidably connected inside the moving groove.

[0008] Furthermore, a plurality of the differential ring retainers are detachably provided with shaft cores, two groups of air passages are arranged inside the shaft cores, through grooves are provided inside the air passages, and the through grooves are fixedly connected to the inside of the movable grooves.

[0009] Furthermore, a spring groove is provided inside the differential ring retainer, a sheet expansion slide seat return spring is fixedly installed inside the spring groove, and the other end of the sheet expansion slide seat return spring is fixedly connected to one side of the moving block.

[0010] Furthermore, a plurality of shaft core guide beads are fixedly installed inside the differential ring retainer, and the plurality of shaft core guide beads are distributed in a ring shape.

[0011] Furthermore, a plurality of guide holes are provided inside the differential ring retainers, and guide posts are detachably installed inside the plurality of guide holes.

[0012] Compared with the prior art, the utility model has the following beneficial effects:

[0013] 1. The radial tensioning of the tension source of the original structure is improved to axial tensioning, which avoids the hidden danger of the disappearance of the tension of the differential ring after the tension-generating piston seat in the original structure rotates during use, and the hidden danger of deviation during installation. The tension of the differential ring under the same air pressure is improved. Compared with the original structure, the strength of the shaft core is enhanced to a certain extent, and the air holes of the shaft core can be symmetrically divided to reduce the runout of the shaft during use.

[0014] 2. Add the core guide bumper to facilitate the installation and unloading of the core during use, reduce the friction during the installation of the winding core and unloading, and use the threaded bumper to facilitate replacement during the production process.

[0015] 3. Change the shape of the expansion sheet, adopt an outer arc hexagonal appearance, increase the contact area between the receiving tube core and the expansion sheet, and reduce damage to the inner surface of the tube core.

[0016] 4. Adding guide columns to the differential ring assembly enables precise assembly, improves the assembly efficiency of the differential ring, and avoids rotation of the expansion plate during the advancement of the piston seat, which causes the expansion plate to bear the shear force caused by the twisting of the expansion plate slide, reduces the flexibility of the entire mechanism, and affects the tension. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model;

[0018] Figure 2 This is a schematic diagram of the cross-sectional structure of the utility model;

[0019] Figure 3 It is an enlarged schematic diagram of the structure at point A of the utility model.

[0020] Illustrations: 1. Differential ring retainer; 11. Expanding piece pushes into piston seat; 12. Movable groove; 13. Expanding piece pushes into piston; 14. Moving block; 15. Expanding piece slide seat return spring; 16. Core guide bumper; 17. Moving groove; 18. Spring groove; 19. Guide hole; 101. Guide column; 2. Shaft core; 21. Airway; 22. Through groove; 3. Differential ring expanding piece. DETAILED DESCRIPTION

[0021] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined purpose of the utility model, the specific implementation method, structure, characteristics and effects of the present invention are described in detail below in combination with the accompanying drawings and preferred embodiments.

[0022] See also Figures 1 to 3 , provided by an embodiment of the utility model, a differential shaft includes a differential ring retainer 1, the differential ring retainer 1 is arranged in multiple groups, and a plurality of differential ring retainers 1 are fixedly installed with a sheet-pushing piston seat 11 inside, and the sheet-pushing piston seat 11 is used for placing a sheet-pushing piston 13, so as to facilitate air intake, and a movable groove 12 is opened inside the sheet-pushing piston seat 11, and the movable groove 12 provides space for the movement of the sheet-pushing piston 13, and the movable groove 12 is slidably connected with the sheet-pushing piston 13 inside. A moving block 14 is fixedly installed on the end of the pushing piston 13. When the expanding piece pushing piston 13 moves, the moving block 14 is driven to move. The surface of the differential ring retainer 1 is rotatably connected with the differential ring expanding piece 3. When the moving block 14 moves, it fits with the differential ring expanding piece 3, so that the differential ring expanding piece 3 can rotate, so that one side of the differential ring expanding piece 3 can be lifted up, so that the differential ring expanding piece 3 can fit with the inner wall of the tube core, which plays a fixing role on the tube core, and the moving block 14 fits with the surface of the differential ring expanding piece 3.

[0023] Specifically, the lower surface of the differential ring expansion piece 3 and one side of the upper surface of the moving block 14 are set to be inclined, the inclined part of the differential ring expansion piece 3 is in contact with the inclined part of the moving block 14, and the inclination angle of the inclined part of the moving block 14 is consistent with the inclination angle of the inclined part of the differential ring expansion piece 3.

[0024] In the embodiment of the utility model, the differential ring expansion piece 3 and the moving block 14 are arranged in close contact with each other, so that the moving block 14 can lift up one side of the differential ring expansion piece 3 when moving.

[0025] Specifically, a moving groove 17 is formed on one side of the differential ring retainer 1 close to the movable groove 12 , and the moving block 14 is slidably connected inside the moving groove 17 .

[0026] In the embodiment of the utility model, the movable groove 17 is provided to make the movable block 14 more stable when moving and will not deviate.

[0027] Specifically, the shaft core 2 is detachably mounted inside the plurality of differential ring retainers 1 , two groups of air passages 21 are arranged inside the shaft core 2 , through grooves 22 are opened inside the air passages 21 , and the through grooves 22 are fixedly connected to the inside of the movable groove 12 .

[0028] In the embodiment of the utility model, by setting the air channel 21 and the through groove 22, the gas inside the shaft core 2 is transported from the through groove 22 to the inside of the movable groove 12, thereby squeezing the expansion piece pushing piston 13, and then driving the moving block 14 to move inside the moving groove 17.

[0029] Specifically, a spring groove 18 is provided inside the differential ring retainer 1 , and a sheet expansion slide seat return spring 15 is fixedly installed inside the spring groove 18 . The other end of the sheet expansion slide seat return spring 15 is fixedly connected to one side of the moving block 14 .

[0030] In the embodiment of the utility model, when the work is finished, the sheet expansion slide seat return spring 15 pulls the moving block 14 to the initial position, so as to facilitate the next use.

[0031] Specifically, a plurality of tube core guide beads 16 are slidably connected to the surface of the differential ring retainer 1, and the plurality of tube core guide beads 16 are distributed in a ring shape.

[0032] In the embodiment of the utility model, a tube core guide bumper 16 is added to facilitate the installation and unloading of the tube core during use, reduce the friction during the installation of the winding core and the unloading process, and use a threaded bumper to facilitate replacement during the production process.

[0033] Specifically, the surface of the differential ring expansion piece 3 is integrally formed with sharp blocks, and the provision of the sharp blocks can increase the friction between the inner wall of the tube core and the surface of the differential ring retainer 1 .

[0034] Specifically, a plurality of differential ring retainers 1 are provided with guide holes 19 inside, and guide posts 101 are detachably installed inside the plurality of guide holes 19 .

[0035] In the embodiment of the utility model, adding the guide column 101 enables precise assembly, improves the assembly efficiency of the differential ring, and avoids rotation during the advancement of the expansion plate into the piston seat 11, which causes the expansion plate to bear the shear force caused by the twisting of the expansion plate slide, thereby reducing the flexibility of the entire mechanism and affecting the tension.

[0036] When in use, the gas inside the shaft core 2 is transported from the through groove 22 to the movable groove 12, thereby squeezing the expansion plate pushing piston 13, and then driving the moving block 14 to move inside the moving groove 17. When the moving block 14 moves, it fits with the differential ring expansion plate 3, so that the differential ring expansion plate 3 can rotate, so that one side of the differential ring expansion plate 3 can be lifted up, and the surface of the differential ring expansion plate 3 can fit with the inner wall of the tube core, thereby fixing the tube core.

[0037] The above description is only a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Although the present invention has been disclosed as a preferred embodiment as above, it is not intended to limit the present invention. Any technical personnel in this field can make some changes or modify the technical contents disclosed above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A differential shaft, comprising a differential ring retainer (1), characterized in that: The differential ring retainer (1) is arranged in a plurality of groups, and a plurality of the differential ring retainers (1) are fixedly installed with an expansion plate pushing piston seat (11) inside, a movable groove (12) is provided inside the expansion plate pushing piston seat (11), an expansion plate pushing piston (13) is slidably connected inside the movable groove (12), a moving block (14) is fixedly installed at the end of the expansion plate pushing piston (13), a differential ring expansion plate (3) is rotatably connected to the surface of the differential ring retainer (1), and the moving block (14) is in contact with the surface of the differential ring expansion plate (3).

2. The slip shaft according to claim 1, characterized in that: The lower surface of the differential ring expansion piece (3) and one side of the upper surface of the moving block (14) are arranged in an inclined shape, the inclined part of the differential ring expansion piece (3) is in contact with the inclined part of the moving block (14), and the inclination angle of the inclined part of the moving block (14) is consistent with the inclination angle of the inclined part of the differential ring expansion piece (3).

3. The slip shaft according to claim 1, characterized in that: A moving groove (17) is provided on one side of the differential slip ring retainer (1) close to the movable groove (12), and the moving block (14) is slidably connected inside the moving groove (17).

4. The slip shaft according to claim 1, characterized in that: A plurality of differential ring retainers (1) are detachably provided with shaft cores (2), two groups of air passages (21) are provided inside the shaft cores (2), through grooves (22) are provided inside the air passages (21), and the through grooves (22) are fixedly connected to the inside of the movable grooves (12).

5. The differential slip shaft according to claim 1, characterized in that: A spring groove (18) is provided inside the differential ring retainer (1), a sheet expansion slide seat return spring (15) is fixedly installed inside the spring groove (18), and the other end of the sheet expansion slide seat return spring (15) is fixedly connected to one side of the moving block (14).

6. The slip shaft according to claim 1, characterized in that: A plurality of tube core guide bumping beads (16) are slidably connected to the surface of the differential ring retainer (1), and the plurality of tube core guide bumping beads (16) are distributed in a ring shape.

7. The slip shaft according to claim 1, characterized in that: A plurality of the differential slip ring retainers (1) are provided with guide holes (19) inside, and a plurality of the guide holes (19) are provided with guide columns (101) detachably mounted inside.

Images