A tension-adjustable slip shaft

Abstract

The present invention relates to a slip shaft with adjustable tension, and relates to the technical field of slip shafts, comprising a gas shaft main body and a plurality of slip rings mounted on the gas shaft main body, the slip ring comprising a gear ring, a tension ring body and an end face bearing, the tension ring body and the end face bearing are both sleeved on the gas shaft main body, the gear ring is sleeved on the end face bearing, an air intake ring groove is provided on the inner wall of the tension ring body, a piston hole is provided at the bottom of the air intake ring groove, a piston body is installed in the piston hole, an air intake main pipe is provided on the gas shaft main body, an air intake branch pipe is provided on the side wall of the air intake main pipe, a plug-in cylinder is installed at one end of the gear ring, a fixed sleeve is installed at the other end, a plug-in column is slidably installed in the fixed sleeve, a lever is fixedly provided on the side wall of the plug-in column, a sliding groove and a limiting part are provided on the side wall of the fixed sleeve, a spring is installed in the fixed sleeve, an adjustment groove is provided on the side wall of the gear ring, and the lever is located in the adjustment groove. The present invention has the characteristics of adjustable tension, wide application range, and no need for replacement.

Description

Technical Field

[0001] The invention relates to the technical field of slip differential shafts, and in particular to a slip differential shaft with adjustable tension. Background Art

[0002] The slip shaft, also known as the friction shaft, has a special structure consisting of multiple slip rings. It is mainly used for the reel shaft 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 slip ring on the slip shaft to make multiple rolls on the shaft always maintain constant tension when rewinding and unwinding.

[0003] A Chinese invention patent with application number CN201721824161.8 discloses a slip differential shaft with a single air path structure, including a retaining ring, a bevel block and an expansion sleeve, one end of the retaining ring is embedded with one end of the bevel block, and a bearing is fixedly installed inside the one end of the retaining ring, and the other end of the bevel block is cooperated with and installed with an expansion sleeve, and a plurality of piston holes are equidistantly distributed on the end faces of the expansion sleeve and the bevel block adjacent, a piston block is installed inside the piston hole, and the piston block is placed in the air passage inside the expansion sleeve, a ventilation groove and two grooves are provided on the inner side of the expansion sleeve, the ventilation groove is located between the two grooves, an O-ring is embedded inside the groove, a plurality of pairs of claws are provided on the outside of the bevel block, and a spring is clamped on the outside of the bevel block, and an air hole connected to the cavity between the piston block and the piston hole wall is provided in the ventilation groove.

[0004] The slip shaft of the single gas path structure of the above invention is designed as an O-ring gas seal in the sleeve of each slip ring, and at the same time has a mechanical contact seal structure, a double sealing effect. However, in actual production, when producing products of different types or specifications, the tension required for winding is also different. If the above slip shaft is used for production, since the winding tension cannot be adjusted, different slip shafts need to be replaced when winding products of different types or specifications. The replacement process is relatively troublesome, which seriously affects production efficiency. Therefore, it is necessary to propose a new solution to solve the above problem. Summary of the invention

[0005] In view of the deficiencies in the prior art, the purpose of the present invention is to provide a slip shaft with adjustable tension, which can adjust its own torque, is suitable for the production of products of different types or specifications, has a wide range of applications, and is simple and convenient to adjust.

[0006] The above-mentioned object of the present invention is achieved through the following technical solutions:

[0007] A tension-adjustable differential shaft comprises a gas shaft main body and a plurality of differential rings mounted on the gas shaft main body, the differential ring comprising a gear ring, a tension ring body and an end face bearing, the tension ring body and the end face bearing are both sleeved on the gas shaft main body, the gear ring is sleeved on the end face bearing, an air intake ring groove is provided on the inner wall of the tension ring body, a plurality of piston holes are provided on the bottom of the air intake ring groove, a piston body is slidably mounted in the piston hole, the gas shaft main body is provided with an air intake manifold connected to an air source along its axial direction, the air intake manifold The side wall of the tube is provided with an intake branch pipe connected with the intake ring groove, one end of the gear ring is installed with a plug-in cylinder, and the other end is installed with a fixed sleeve, a plug-in column matching the plug-in sleeve is slidably installed in the fixed sleeve, and a lever is fixedly provided on the side wall of the plug-in column, and a sliding groove for sliding the lever and a limiting portion for limiting the lever are provided on the side wall of the fixed sleeve, a spring abutting against the lever is installed in the fixed sleeve, and an adjustment groove is provided on the side wall of the gear ring, and the lever is located in the adjustment groove.

[0008] By adopting the above technical solution, when the differential shaft is in use, the differential ring is installed on the air shaft body, and then the reel for winding is wound around the differential shaft. The intake main pipe transports the gas in the air source to the intake ring groove through the intake branch pipe. The air pressure in the intake ring groove increases, pushing the piston body to slide in the piston hole toward the inner wall of the gear ring until it is tightly against the inner wall of the gear ring. When the air shaft body rotates, the gear ring is driven to rotate synchronously through the abutment between the piston body and the gear ring. In the specific production process, when winding products of different types or specifications, the lever is pushed to move in the slide groove toward the plug-in cylinder of the adjacent slip ring, so that the plug-in column and the plug-in cylinder are plugged in. When the air shaft body rotates, the adjacent slip rings are synchronously rotated, thereby increasing the tension of the roll; when the tension of the paper roll needs to be reduced, the lever is pushed to move in the slide groove toward the plug-in cylinder away from the adjacent slip ring, so that the plug-in column and the plug-in cylinder are separated, the slip force of the slip shaft is reduced, and the tension of the roll is reduced; the remaining slip rings are adjusted by the above method, so that the torque of the entire slip shaft is adjustable, so that the roll has different tensions during the winding process, so as to adapt to products of different types or specifications. The adjustment process is simple and convenient, has good applicability to industrial production, saves time for replacing the slip shaft, and improves production efficiency.

[0009] In a preferred example, the present invention can be further configured as follows: a snap-in groove is provided on the side wall of the plug-in column, a snap-in ball snap-connected therewith is installed in the installation groove, and a limiting groove is provided on the inner wall of the gear ring for limiting the snap-in ball.

[0010] By adopting the above technical solution, a clamping groove is opened on the side wall of the plug-in column, a clamping ball is installed in the clamping groove, and a limit groove is opened on the inner wall of the gear ring to prevent the plug-in sleeve from rotating synchronously with the plug-in column during the process of moving the lever, so that the adjustment groove and the sliding groove are always in relative positions, ensuring that the lever can be moved accurately.

[0011] In a preferred example, the present invention can be further configured as follows: the end bearings are located at both ends of the gear ring, the air shaft body is sleeved with a spacer for fixing the tension ring body, and the spacer is located between the end bearings and the tension ring body.

[0012] By adopting the above technical solution, a spacer sleeve is sleeved on the air shaft body, and the spacer sleeve cooperates with the end face bearing to fix the tension ring body, so that the installation of the tension ring body is more stable, the piston body is more tightly and stably abutted against the gear ring, and the winding tension adjustment process is more accurate.

[0013] In a preferred example, the present invention can be further configured as follows: the outer wall of the tension ring is arc-shaped, the inner wall of the gear ring is provided with an installation cavity for installing the tension ring, and both ends of the gear ring are provided with installation grooves for installing the tension ring into the installation cavity.

[0014] By adopting the above technical solution, before the differential ring is installed on the air shaft body, the tension ring body is first installed in the installation cavity. During installation, the tension ring body is aligned with the installation groove and slid into the installation cavity. Then, the tension ring body is rotated in the installation cavity so that the axis of the tension ring body and the gear ring are in the same straight line. Then, the spacer sleeve is installed in the installation cavity, and the spacer sleeve and the tension ring body are fixed by the end face bearing. When installing the differential ring on the air shaft body, the differential ring sleeve is sequentially installed on the air shaft body, and the two ends of the air shaft body are fixed with bearing end covers.

[0015] In a preferred example, the present invention can be further configured as follows: the inner wall of the tension ring body is provided with a first sealing groove and a second sealing groove, a first sealing ring is installed in the first sealing groove, a second sealing ring is installed in the second sealing groove, and the intake ring groove is located between the first sealing groove and the second sealing groove.

[0016] By adopting the above technical solution, a first sealing groove and a second sealing groove are respectively opened on both sides of the intake ring groove, and a first sealing ring and a second sealing ring are respectively installed in the first sealing groove and the second sealing groove. The first sealing ring and the second sealing ring play a sealing role for the intake ring groove during intake, thereby improving the air tightness of the differential ring.

[0017] In a preferred example, the present invention can be further configured as follows: an end of the lever away from the plug-in column is provided with a plug-in slot for facilitating the lever to be pushed.

[0018] By adopting the above technical solution, a plug-in slot is provided at one end of the lever away from the plug-in column, and the plug-in slot can be used to push the lever with other tools, so that the plug-in slot makes it more convenient to push the lever.

[0019] In a preferred example, the present invention can be further configured as follows: the inner wall of the plug-in cylinder is conical, and the diameter decreases along the direction in which the plug-in column is inserted.

[0020] By adopting the above technical solution, the inner wall of the plug-in cylinder is set to be conical, which is convenient for plugging and matching with the plug-in column, making it more convenient to adjust the matching relationship between the differential rings.

[0021] In a preferred example, the present invention can be further configured as follows: a plurality of spacer rings are sleeved on the air shaft body, and the spacer rings are located between adjacent differential slip rings.

[0022] By adopting the above technical solution, a spacer ring is installed on the air shaft body, and the spacer ring isolates adjacent differential slip rings to prevent the differential slip rings from affecting each other during rotation.

[0023] In summary, the present invention includes at least one of the following beneficial technical effects:

[0024] By setting a plug-in column and a plug-in cylinder, and utilizing the mutual plug-in cooperation relationship between the two, when the air shaft body rotates, the adjacent slip rings are rotated synchronously, thereby increasing the tension of the roll; when the tension of the paper roll needs to be reduced, the lever is pushed in the slide groove to move in the direction of the plug-in cylinder away from the adjacent slip ring, so that the plug-in column is separated from the plug-in cylinder, the slip force of the slip shaft is reduced, and the tension of the roll is reduced; the remaining slip rings are adjusted by the above method, so that the torque of the entire slip shaft is adjustable, so that the roll has different tensions during the winding process, so as to adapt to products of different types or specifications;

[0025] By providing a clamping groove on the side wall of the plug-in column, installing a clamping ball in the clamping groove, and providing a limit groove on the inner wall of the gear ring, the plug-in sleeve is prevented from synchronously rotating with the plug-in column during the process of toggling the lever, so that the adjustment groove and the slide groove are always in relative positions, ensuring that the lever can be accurately toggled;

[0026] By sleeve-mounting a spacer on the air shaft body and fixing the tension ring with the end bearing, the installation of the tension ring is more stable, the piston body is more closely and stably abutted against the gear ring, and the winding tension is adjusted more accurately. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0028] Figure 2 This is a structural schematic diagram of the present invention for highlighting the installation relationship between the gas shaft body and the differential ring;

[0029] Figure 3 It is a cross-sectional schematic diagram of the present invention for highlighting the true slip ring structure;

[0030] Figure 4 yes Figure 3 Enlarged schematic diagram of part A.

[0031] In the figure, 1, air shaft body; 2, differential ring; 21, gear ring; 22, tension ring body; 23, end bearing; 3, spacer ring; 4, mounting cavity; 5, spacer sleeve; 6, mounting groove; 7, first sealing groove; 8, second sealing groove; 9, first sealing ring; 10, second sealing ring; 11, intake ring groove; 12, piston hole; 13, piston body; 14, intake main pipe; 15, intake branch pipe; 16, plug-in cylinder; 17, fixed sleeve; 18, plug-in column; 19, lever; 20, slide groove; 24, spring; 25, limit part; 26, adjustment groove; 27, plug-in groove; 28, snap-in groove; 29, snap-in ball; 30, limit groove. DETAILED DESCRIPTION

[0032] The present invention is further described in detail below in conjunction with the accompanying drawings.

[0033] Reference Figure 1 and Figure 2 , which is a tension-adjustable differential shaft disclosed in the present invention, comprises a cylindrical air shaft body 1 and a plurality of differential rings 2 mounted on the air shaft body 1, a spacer ring 3 is sleeved on the air shaft body 1, the spacer ring 3 is located between adjacent differential rings 2, and the spacer ring 3 isolates adjacent differential rings 2.

[0034] Reference Figure 2 and Figure 3 The differential ring 2 includes a gear ring 21, a tension ring body 22 and an end bearing 23, all of which are in annular shape. The tension ring body 22 and the end bearing 23 are both sleeved on the air shaft body 1, and the gear ring 21 is sleeved on the end bearing 23, and the end bearing 23 supports the gear ring 21.

[0035] The outer wall of the tension ring body 22 is arranged in an arc shape, and the inner wall of the gear ring 21 is provided with an annular installation cavity 4. The tension ring body 22 is located inside the installation cavity 4. The end face bearings 23 are respectively installed at the two ends of the inner wall of the gear ring 21. A cylindrical spacer sleeve 5 is installed between the end face bearings 23 and the tension ring body 22. One end of the spacer sleeve 5 abuts against the end face of the end face bearing 23, and the other end abuts against the end face of the tension ring body 22. The end face bearings 23 cooperate with the spacer sleeve 5 to fix the tension ring body 22.

[0036] The two end faces of the gear ring 21 are provided with square mounting grooves 6. Since the outer wall of the gear ring 21 is arranged in an arc shape, the gear ring 21 cannot be directly mounted in the mounting cavity 4. The mounting grooves 6 can be used to mount the tension ring body 22. During the installation process, the tension ring body 22 is aligned with the mounting grooves 6 and slid into the mounting cavity 4. Then, the tension ring body 22 is rotated in the mounting cavity 4 so that the axis of the tension ring body 22 and the gear ring 21 are in the same straight line. Then, the spacer 5 is installed in the mounting cavity 4, and the spacer 5 and the tension ring body 22 are fixed by the end face bearing 23. When the differential ring 2 is mounted on the air shaft body 1, the differential ring 2 is sequentially mounted on the air shaft body 1, and the two ends of the air shaft body 1 are fixed with bearing end covers.

[0037] The inner wall of the tension ring body 22 is respectively provided with a first sealing groove 7 and a second sealing groove 8, a first sealing ring 9 is installed in the first sealing groove 7, and a second sealing ring 10 is installed in the second sealing groove 8. Preferably, the first sealing ring 9 and the second sealing ring 10 are both made of rubber material, and the intake ring groove 11 is located between the first sealing groove 7 and the second sealing groove 8. The first sealing ring 9 and the second sealing ring 10 seal the intake ring groove 11 during air intake, thereby improving the air tightness of the differential ring 2.

[0038] The inner wall of the tension ring body 22 is provided with an air intake annular groove 11, and the bottom of the air intake annular groove 11 is provided with a plurality of circular piston holes 12, and a piston body 13 matching therewith is slidably installed in the piston hole 12. The air shaft body 1 is provided with a circular air intake manifold 14 along its axial direction, and the air intake manifold 14 is connected to an external air source, and a plurality of air intake branch pipes 15 connected to the air intake annular groove 11 are provided on the pipe wall of the air intake manifold 14. When the differential shaft is in use, the differential ring 2 is installed on the air shaft body 1, and then the reel for winding is wound around the differential shaft. The intake main pipe 14 transports the gas in the air source to the intake ring groove 11 through the intake branch pipe 15. The air pressure in the intake ring groove 11 increases, pushing the piston body 13 to slide in the piston hole 12 toward the inner wall of the gear ring 21 until it is tightly against the inner wall of the gear ring 21. When the air shaft body 1 rotates, the gear ring 21 is driven to rotate synchronously through the abutment between the piston body 13 and the gear ring 21.

[0039] A plug-in cylinder 16 which is generally cylindrical is installed on one end face of the gear ring 21, and the end face of the plug-in cylinder 16 is flush with the end face of the gear ring 21; a cylindrical fixing sleeve 17 is installed on the other end face of the gear ring 21, and at the same time, the fixing sleeve 17 is fixed in the gear ring 21 by clamping its end face through a fixing clamping ring, and a plug-in column 18 which is plugged in with the plug-in cylinder 16 is slidably installed in the fixing sleeve 17, and the inner wall of the plug-in cylinder 16 is conical, and the diameter gradually decreases along the insertion direction of the plug-in column 18.

[0040] Reference Figure 3 and Figure 4A cylindrical lever 19 is embedded on the side wall of the plug-in column 18, a sliding groove 20 is opened on the side wall of the fixed sleeve 17 along the sliding direction of the plug-in column 18, the lever 19 is located in the sliding groove 20, a spring 24 is installed in the fixed sleeve 17, and a gear ring 21 is opened on the side wall close to the fixed sleeve 17 to form an abutment groove, one end of the spring 24 abuts against the bottom of the abutment groove, and the other end abuts against one end of the plug-in column 18; at the same time, a limiting portion 25 is provided on the side wall of the fixed sleeve 17, and the limiting portion 25 is located on the side of the sliding groove 20 close to the spring 24.

[0041] In the specific production process, when winding products of different types or specifications, the push rod 19 is pushed to move in the slide groove 20 toward the plug-in cylinder 16 of the adjacent slip ring 2, so that the plug-in column 18 is plugged into the plug-in cylinder 16, and when the air shaft body 1 rotates, the adjacent slip rings 2 are rotated synchronously, thereby increasing the tension of the roll; when the tension of the paper roll needs to be reduced, the push rod 19 is pushed to move in the slide groove 20 toward the plug-in cylinder 16 away from the adjacent slip ring 2, so that the plug-in column 18 is separated from the plug-in cylinder 16, reducing the slip force of the slip shaft, thereby reducing the tension of the roll; the remaining slip rings 2 are adjusted in the above method, so that the torque of the entire slip shaft is adjustable, so that the roll has different tensions during the winding process, so as to adapt to products of different types or specifications.

[0042] An adjustment slot 26 is provided on the outer wall of the gear ring 21, and the lever 19 is located in the adjustment slot 26. An insertion slot 27 is provided at the end of the lever 19 away from the insertion column 18, and the insertion slot 27 can be used to move the lever 19 with other tools, making it more convenient to move the lever 19.

[0043] A hemispherical engaging groove 28 is provided on the side wall of the plug-in column 18, and an engaging ball 29 engaging with the engaging groove 28 is installed in the engaging groove 28. A limiting groove 30 is provided on the inner wall of the gear ring 21, and the engaging ball 29 is located in the limiting groove 30. The function of the engaging ball 29 is to prevent the plug-in sleeve from rotating synchronously with the plug-in column 18 during the process of shifting the lever 19, so that the adjustment groove 26 and the slide groove 20 are always in relative positions, and ensure that the lever 19 can be shifted accurately.

[0044] The implementation principle of this embodiment is: when the differential shaft is in use, the differential ring 2 is installed on the air shaft body 1, and then the reel for winding is wound around the differential shaft, and the intake manifold 14 transports the gas in the air source to the intake ring groove 11 through the intake branch pipe 15. The air pressure in the intake ring groove 11 increases, pushing the piston body 13 to slide in the piston hole 12 toward the inner wall of the gear ring 21 until it is tightly against the inner wall of the gear ring 21. When the air shaft body 1 rotates, the gear ring 21 is driven to rotate synchronously through the abutment between the piston body 13 and the gear ring 21.

[0045] In the specific production process, when winding products of different types or specifications, the push rod 19 is pushed to move in the slide groove 20 toward the plug-in cylinder 16 of the adjacent slip ring 2, so that the plug-in column 18 is plugged into the plug-in cylinder 16, and when the air shaft body 1 rotates, the adjacent slip rings 2 are rotated synchronously, thereby increasing the tension of the roll; when the tension of the paper roll needs to be reduced, the push rod 19 is pushed to move in the slide groove 20 toward the plug-in cylinder 16 away from the adjacent slip ring 2, so that the plug-in column 18 is separated from the plug-in cylinder 16, reducing the slip force of the slip shaft, thereby reducing the tension of the roll; the remaining slip rings 2 are adjusted in the above method, so that the torque of the entire slip shaft is adjustable, so that the roll has different tensions during the winding process, so as to adapt to products of different types or specifications.

[0046] The embodiments of this specific implementation method are all preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention. Therefore, all equivalent changes made based on the structure, shape, and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A tension-adjustable differential shaft, comprising a gas shaft body (1) and a plurality of differential rings (2) mounted on the gas shaft body (1), characterized in that: The differential ring (2) comprises a gear ring (21), a tension ring body (22) and an end face bearing (23); the tension ring body (22) and the end face bearing (23) are both sleeved on the gas shaft body (1); the gear ring (21) is sleeved on the end face bearing (23); an air intake ring groove (11) is provided on the inner wall of the tension ring body (22); a plurality of piston holes (12) are provided at the bottom of the air intake ring groove (11); a piston body (13) is slidably mounted in the piston hole (12); and the gas shaft body (11) is provided with a plurality of piston holes (12) along its axial direction. An intake manifold (14) connected to an air source is provided on the side wall of the intake manifold (14) with an intake branch pipe (15) connected to the intake ring groove (11); a plug-in cylinder (16) is installed at one end of the gear ring (21), and a fixed sleeve (17) is installed at the other end; a plug-in column (18) matching with the plug-in sleeve is slidably installed in the fixed sleeve (17); a lever (19) is fixedly provided on the side wall of the plug-in column (18); and a sliding groove (20) for the sliding of the lever (19) is provided on the side wall of the fixed sleeve (17). and a limiting portion (25) for limiting the position of the lever (19); a spring (24) abutting against the lever (19) is installed in the fixed sleeve (17); an adjustment groove (26) is provided on the side wall of the gear ring (21); the lever (19) is located in the adjustment groove (26); a clamping groove (28) is provided on the side wall of the plug-in column (18); a clamping ball (29) clamped therewith is installed in the clamping groove (28); and a limiting groove (30) for limiting the position of the clamping ball (29) is provided on the inner wall of the gear ring (21). The end face bearings (23) are located at both ends of the gear ring (21); a spacer (5) for fixing the tension ring (22) is sleeved on the air shaft body (1); the spacer (5) is located between the end face bearings (23) and the tension ring (22); the outer wall of the tension ring (22) is arranged in an arc shape; the inner wall of the gear ring (21) is provided with a mounting cavity (4) for mounting the tension ring (22); and mounting grooves (6) for mounting the tension ring (22) into the mounting cavity (4) are provided at both ends of the gear ring (21).

2. The tension-adjustable slip shaft according to claim 1, characterized in that: The inner wall of the tension ring body (22) is provided with a first sealing groove (7) and a second sealing groove (8); a first sealing ring (9) is installed in the first sealing groove (7); a second sealing ring (10) is installed in the second sealing groove (8); and the air intake ring groove (11) is located between the first sealing groove (7) and the second sealing groove (8).

3. The tension-adjustable slip shaft according to claim 1, characterized in that: An end of the lever (19) away from the plug-in column (18) is provided with a plug-in slot (27) for facilitating the lever (19) to be pushed.

4. The tension-adjustable slip shaft according to claim 1, characterized in that: The inner wall of the plug-in cylinder (16) is arranged in a conical shape, and its diameter decreases along the direction in which the plug-in column (18) is inserted.

5. The tension-adjustable slip shaft according to claim 1, characterized in that: A plurality of spacer rings (3) are sleeved on the air shaft body (1), and the spacer rings (3) are located between adjacent slip rings (2).

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