Roller unwinding mechanism

Abstract

This utility model discloses a fabric roll unwinding mechanism, including a frame, a left mounting base, a right mounting base, a left rotating shaft, a right rotating shaft, a left bushing, a right bushing, a drive component, at least two left tensioning blocks, and at least two right tensioning blocks. The left mounting base is connected to the frame, the right mounting base is slidably connected to the frame in a left-right direction, the left rotating shaft is rotatably connected to the left mounting base, the right rotating shaft is rotatably connected to the right mounting base, the left bushing is slidably sleeved on the left rotating shaft in a left-right direction, and the left bushing has a left boss portion. The right bushing is slidably sleeved on the right rotating shaft in a left-right direction, and the right bushing has a right boss portion. The left tensioning blocks are radially slidably mounted on the left bushing, and the right tensioning blocks are radially slidably mounted on the right bushing. This utility model can reduce the difficulty of changing and installing fabric rolls and improve the convenience and efficiency of changing and installing fabric rolls.

Description

Technical Field

[0001] This utility model relates to an unwinding mechanism for fabric rolls. Background Technology

[0002] Currently, existing unwinding devices typically use air shafts to secure fabric rolls. During unwinding, the fabric roll rotates together with the air shaft. However, this type of unwinding device using air shafts is very inconvenient when changing or installing fabric rolls. For example, Chinese patent CN217516444U uses an air shaft to secure the fabric roll. One end of the air shaft is supported by a fixing seat, while the other end is supported by a clamping assembly. When changing the fabric roll, the clamping assembly must be opened first before the fabric roll can be fitted onto the air shaft. Furthermore, due to the long length of the air shaft and the weight of the fabric roll, fitting the fabric roll onto the air shaft is very difficult and inconvenient, resulting in inconvenience when changing or installing fabric rolls, high operational difficulty, and low efficiency. Utility Model Content

[0003] The technical problem to be solved by this utility model is to overcome the defects of the prior art and provide a fabric roll unwinding mechanism that can reduce the difficulty of replacing and installing fabric rolls and improve the convenience and efficiency of replacing and installing fabric rolls.

[0004] To solve the above-mentioned technical problems, the technical solution of this utility model is: a cloth roll unwinding mechanism, including a frame, a left mounting seat, a right mounting seat, a left rotating shaft, a right rotating shaft, a left shaft sleeve, a right shaft sleeve, a driving component, at least two left tensioning blocks and at least two right tensioning blocks;

[0005] The left mounting base is connected to the frame, and the right mounting base is slidably connected to the frame in the left-right direction;

[0006] The left rotating shaft is rotatably connected to the left mounting base, and the right rotating shaft is rotatably connected to the right mounting base. The rotation axis of the left rotating shaft is set in the left-right direction and coincides with the rotation axis of the right rotating shaft.

[0007] The left bushing is slidably sleeved on the left rotating shaft in the left direction and is used to extend into the left end of the central hole in the cloth roll. The left bushing is provided with a left protrusion for abutting against the left end face of the cloth roll.

[0008] The right bushing is slidably sleeved on the right rotating shaft in the left-right direction and is used to extend into the right end of the center hole in the cloth roll. The right bushing is provided with a right protrusion for abutting against the right end face of the cloth roll.

[0009] The left expansion block is slidably mounted on the left shaft sleeve along the radial direction of the left shaft sleeve;

[0010] The right expansion block is slidably mounted on the right bushing along the radial direction of the right bushing;

[0011] The driving component is connected to the right mounting base. When the fabric roll is located between the left bushing and the right bushing, the driving component drives the right mounting base to move to the left, thereby moving the right bushing and the right tensioning block to the left until they extend into the right end of the central hole and the right boss abuts against the right end face of the fabric roll. This causes the fabric roll to move to the left so that the left bushing and the left tensioning block extend into the left end of the central hole and the left boss abuts against the left end face of the fabric roll. This causes the right rotating shaft to move to the left relative to the right bushing and the left bushing to move to the left relative to the left rotating shaft.

[0012] The left rotating shaft is used to abut against the left tightening block and drive the left tightening block to move radially outward to tighten the inner wall of the central hole when the left shaft sleeve moves to the left relative to the left rotating shaft.

[0013] The right rotating shaft is used to abut against the right tightening block and drive the right tightening block to move radially outward to tighten the inner wall of the central hole when the right rotating shaft moves to the left relative to the right bushing.

[0014] Furthermore, the left rotating shaft is provided with a left limiting hole, and the left limiting hole is provided with a left limiting boss that protrudes radially inward. A left limiting rod that extends into the left limiting hole is connected to the left shaft sleeve. The left limiting rod is provided with a left limiting step that protrudes radially outward and is located to the left of the left limiting boss. The left limiting step is used to abut against the left limiting boss when the left shaft sleeve moves to the right limit position relative to the left rotating shaft to prevent the left shaft sleeve from slipping off the left rotating shaft.

[0015] The right-hand rotating shaft is provided with a right limiting hole, and the right limiting hole is provided with a right limiting boss that protrudes radially inward. A right limiting rod that extends into the right limiting hole is connected to the right bushing. The right limiting rod is provided with a right limiting step that protrudes radially outward and is located to the right of the right limiting boss. The right limiting step is used to abut against the right limiting boss when the right bushing moves to the left limit position relative to the right rotating shaft to prevent the right bushing from slipping off the right rotating shaft.

[0016] Furthermore, the unwinding mechanism for the fabric roll also includes a left magnetic powder brake and a right magnetic powder brake;

[0017] The left magnetic powder brake is connected to the left mounting base and to the left rotating shaft, and is used to apply rotational resistance to the left rotating shaft;

[0018] The right magnetic powder brake is connected to the right mounting base and to the right rotating shaft, and is used to apply rotational resistance to the right rotating shaft.

[0019] Furthermore, the left rotating shaft is provided with a left driving inclined surface corresponding to the left tightening block, and the left tightening block is provided with a left mating inclined surface for abutting against the corresponding left driving inclined surface. The left driving inclined surface on the left rotating shaft is used to abut against the left mating inclined surface on the corresponding left tightening block and drive the left tightening block to move radially outward to tighten the inner wall of the central hole when the left bushing moves to the left relative to the left rotating shaft.

[0020] The right rotating shaft is provided with a right driving inclined surface corresponding to the right tightening block. The right tightening block is provided with a right mating inclined surface for abutting against the corresponding right driving inclined surface. The right driving inclined surface on the right rotating shaft is used to abut against the right mating inclined surface on the corresponding right tightening block and drive the right tightening block to move radially outward to tighten the inner wall of the central hole when the right rotating shaft moves to the left relative to the right bushing.

[0021] Furthermore, the left rotating shaft is provided with a left driving groove corresponding to the left tensioning block;

[0022] The left expansion block has a left mating part that fits into the corresponding left drive groove;

[0023] The left mating inclined surface is provided on the left mating part;

[0024] The left drive ramp is located at the bottom of the corresponding left drive slot;

[0025] The right rotating shaft is provided with a right drive groove corresponding to the right expansion block;

[0026] The right expansion block has a right mating part that fits into the corresponding right drive groove;

[0027] The right mating inclined surface is provided on the right mating part;

[0028] The right drive ramp is located at the bottom of the corresponding right drive slot.

[0029] Furthermore, the left bushing is provided with a left sliding hole that corresponds to the left expansion block and extends radially along the left bushing;

[0030] The left expansion block also has a left abutment portion that is connected to the left mating portion and is radially slidably installed in the corresponding left sliding hole;

[0031] The left drive ramp is used to abut against the left mating ramp on the left mating part when the left bushing moves to the left relative to the left rotation axis, and drive the left mating part and the left abutting part to move outward along the left sliding hole, thereby causing the left abutting part to press against the inner wall of the center hole;

[0032] The right bushing is provided with a right sliding hole that corresponds to the right expansion block and extends radially along the right bushing;

[0033] The right expansion block also has a right abutment part that is connected to the right mating part and is radially slidably installed in the corresponding right sliding hole;

[0034] The right drive ramp is used to abut against the right mating ramp on the right mating part when the right rotating shaft moves to the left relative to the right bushing, and drive the right mating part and the right abutting part to move outward along the right sliding hole, thereby causing the right abutting part to press against the inner wall of the center hole.

[0035] Furthermore, the left-hand rotating shaft includes a left shaft body and a left shaft head, and the right-hand rotating shaft includes a right shaft body and a right shaft head;

[0036] The left shaft is rotatably connected to the left mounting base, and the right shaft is rotatably connected to the right mounting base. The rotation axis of the left shaft is set in the left-right direction and coincides with the rotation axis of the right shaft.

[0037] The left shaft head is connected to the right end of the left shaft body, and the right shaft head is connected to the left end of the right shaft body;

[0038] The left shaft sleeve is slidably fitted onto the left shaft head in the left-right direction, and the right shaft sleeve is slidably fitted onto the right shaft head in the left-right direction.

[0039] The left drive ramp is located on the left shaft head, and the right drive ramp is located on the right shaft head.

[0040] Furthermore, the driving component is a driving cylinder, which is connected to the frame and connected to the right mounting base and is used to drive the right mounting base to move in the left and right direction.

[0041] Furthermore, the unwinding mechanism for the fabric roll also includes an adjustment mechanism;

[0042] The left mounting base is slidably connected to the frame in the left-right direction. The adjustment mechanism is connected to the left mounting base and is used to drive the left mounting base to slide into position on the frame in the left-right direction and then lock the position of the left mounting base on the frame.

[0043] Furthermore, the adjustment mechanism includes an adjustment screw, an adjustment block, a first locking block, a second locking block, and a locking screw;

[0044] The adjusting block is connected to the left mounting base;

[0045] The adjusting screw is rotatably connected to the frame and threadedly connected to the adjusting block. The adjusting screw is driven to rotate, thereby causing the adjusting block and the left mounting seat to slide into position in the left-right direction.

[0046] The adjusting block is provided with a locking hole, and both the first locking block and the second locking block are slidably installed in the locking hole;

[0047] The first locking block is provided with a first locking surface for abutting and engaging with the outer wall of the adjusting screw;

[0048] The second locking block is provided with a second locking surface for abutting and engaging with the outer wall of the adjusting screw;

[0049] One end of the locking screw passes through the first locking block and is threadedly connected to the second locking block. The first locking block and the locking screw are in clearance fit. The locking screw is also provided with a locking step that abuts against the end face of the first locking block facing away from the second locking block. The locking screw is driven to rotate, thereby causing the first locking block and the second locking block to move towards each other, so that the first locking surface and the second locking surface abut against the outer wall of the adjusting screw.

[0050] With the above technical solution, when replacing and installing the fabric roll, it is only necessary to place the fabric roll on a handcart and then transport it between the left and right bushings using the handcart. The position of the left mounting seat remains fixed, and the driving component drives the right mounting seat to move to the left. When the right mounting seat moves to the left, it drives the right rotating shaft, the right bushing, and the right tensioning block to move to the left as well. This causes the right bushing and the right tensioning block to move to the right end of the center hole in the fabric roll. When the right bushing is in place, the right boss abuts against the right end face of the fabric roll. Then, as the driving component continues to drive the right mounting seat to move to the left, it drives the right rotating shaft and the right bushing to move to the left as well. This causes the right boss to move to the left against the fabric roll. When the fabric roll moves to the left, the left bushing and the left tensioning block extend into the left end of the center hole, and then the left boss abuts against the left end face of the fabric roll. Then, the drive component continues to drive the right mounting base to move to the left. Under the thrust of the drive component, the right rotating shaft moves to the left relative to the right bushing, and the left bushing moves to the left relative to the left rotating shaft. When the left bushing moves to the left relative to the left rotating shaft, the left tensioning block also moves to the left relative to the left rotating shaft. At this time, the left rotating shaft abuts against the left tensioning block and drives the left tensioning block to move radially outward to tension the inner wall of the central hole. When the right rotating shaft moves to the left relative to the right bushing, the right rotating shaft abuts against the right tensioning block and drives the right tensioning block to move radially outward to tension the inner wall of the central hole, thereby tightening and fixing the fabric roll, thus completing the replacement and installation of the fabric roll. When the fabric roll is unwound, the fabric roll, left bushing, right bushing, left tensioning block, right tensioning block, left rotating shaft, and right rotating shaft all rotate together. In this embodiment, the replacement and installation of the fabric roll can be easily completed by simply using a handcart to transport the fabric roll between the left and right bushings, which greatly reduces the difficulty of replacing and installing the fabric roll and improves the convenience and efficiency of replacing and installing the fabric roll. Attached Figure Description

[0051] Figure 1 This is a perspective view of the unwinding mechanism for fabric rolls according to this utility model;

[0052] Figure 2 This is a cross-sectional view of the unwinding mechanism for fabric rolls according to the present invention;

[0053] Figure 3 This is a schematic diagram showing the interconnection of the left mounting base, left rotating shaft, left bushing, and left tightening block of this utility model.

[0054] Figure 4 This is a schematic diagram showing the interconnection of the right mounting base, right rotating shaft, right bushing, and right tightening block of this utility model.

[0055] Figure 5This is an exploded view of the assembly of the left rotating shaft, left bushing, left tightening block, right rotating shaft, right bushing, and right tightening block of this utility model.

[0056] Figure 6 This is a schematic diagram of the structure of the left mounting base and adjustment mechanism of this utility model;

[0057] Figure 7 This is a cross-sectional view of the adjustment mechanism of this utility model;

[0058] Figure 8 This is an exploded view of the assembly of the adjustment mechanism of this utility model;

[0059] In the diagram: 1. Frame; 2. Left mounting base; 3. Right mounting base; 4. Left rotating shaft; 5. Right rotating shaft; 6. Left bushing; 7. Right bushing; 8. Drive unit; 9. Left tension block; 10. Right tension block; 11. Fabric roll; 12. Center hole; 13. Left boss; 14. Right boss; 15. Left limit hole; 16. Left limit boss; 17. Left limit rod; 18. Left limit step; 19. Right limit hole; 20. Right limit boss; 21. Right limit rod; 22. Right limit step; 23. Left magnetic powder brake; 24. Right magnetic powder brake; 25. Left drive ramp; 26. Left mating ramp; 27. Right drive ramp; 28. Right mating ramp Surface; 29. ​​Left drive groove; 30. Left mating part; 31. Right drive groove; 32. Right mating part; 33. Left sliding hole; 34. Left abutment part; 35. Right sliding hole; 36. Right abutment part; 37. Left shaft body; 38. Left shaft head; 39. Right shaft body; 40. Right shaft head; 41. First flange part; 42. Second flange part; 43. Third flange part; 44. Fourth flange part; 45. Adjusting screw; 46. Adjusting block; 47. First locking block; 48. Second locking block; 49. Locking screw; 50. Locking hole; 51. First locking surface; 52. Second locking surface; 53. Locking step; 54. Adjusting handwheel; 55. Locking handwheel. Detailed Implementation

[0060] To make the contents of this utility model easier to understand, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0061] like Figures 1-5 As shown, a fabric roll unwinding mechanism includes a frame 1, a left mounting base 2, a right mounting base 3, a left rotating shaft 4, a right rotating shaft 5, a left shaft sleeve 6, a right shaft sleeve 7, a drive component 8, at least two left tensioning blocks 9, and at least two right tensioning blocks 10.

[0062] The left mounting base 2 is connected to the frame 1, and the right mounting base 3 is slidably connected to the frame 1 in the left-right direction;

[0063] The left rotating shaft 4 is rotatably connected to the left mounting base 2, and the right rotating shaft 5 is rotatably connected to the right mounting base 3. The rotation axis of the left rotating shaft 4 is set in the left-right direction and coincides with the rotation axis of the right rotating shaft 5.

[0064] The left shaft sleeve 6 is slidably sleeved on the left rotating shaft 4 in the left direction and is used to extend into the left end of the central hole 12 in the cloth roll 11. The left shaft sleeve 6 is provided with a left protrusion 13 for abutting against the left end face of the cloth roll 11.

[0065] The right bushing 7 is slidably sleeved on the right rotating shaft 5 in the left and right direction and is used to extend into the right end of the center hole 12 in the cloth roll 11. The right bushing 7 is provided with a right boss 14 for abutting against the right end face of the cloth roll 11.

[0066] The left expansion block 9 is slidably mounted on the left shaft sleeve 6 along the radial direction of the left shaft sleeve 6;

[0067] The right expansion block 10 is slidably mounted on the right bushing 7 along the radial direction of the right bushing 7;

[0068] The driving component 8 is connected to the right mounting base 3. When the fabric roll 11 is located between the left bushing 6 and the right bushing 7, the driving component 8 drives the right mounting base 3 to move to the left, thereby driving the right bushing 7 and the right tensioning block 10 to move to the left until they extend into the right end of the center hole 12 and the right boss 14 abuts against the right end face of the fabric roll 11. This causes the fabric roll 11 to move to the left so that the left bushing 6 and the left tensioning block 9 extend into the left end of the center hole 12 and the left boss 13 abuts against the left end face of the fabric roll 11. This causes the right rotating shaft 5 to move to the left relative to the right bushing 7 and the left bushing 6 to move to the left relative to the left rotating shaft 4.

[0069] The left rotating shaft 4 is used to abut against the left expansion block 9 and drive the left expansion block 9 to move radially outward to expand the inner wall of the central hole 12 when the left shaft sleeve 6 moves to the left relative to the left rotating shaft 4.

[0070] The right rotating shaft 5 is used to abut against the right expansion block 10 and drive the right expansion block 10 to move radially outward to expand the inner wall of the central hole 12 when the right rotating shaft 5 moves to the left relative to the right bushing 7.

[0071] Specifically, when replacing and installing the fabric roll 11, simply place the fabric roll 11 on a handcart and then transport it between the left bushing 6 and the right bushing 7 using the handcart. The position of the left mounting seat 2 remains fixed, and the driving component 8 drives the right mounting seat 3 to move to the left. When the right mounting seat 3 moves to the left, it drives the right rotating shaft 5, the right bushing 7, and the right tensioning block 10 to move to the left together, thereby causing the right bushing 7 and the right tensioning block 10 to move to the right end of the center hole 12 inserted into the fabric roll 11. When the right bushing 7 is inserted into place, the right boss 14 will abut against the right end face of the fabric roll 11. Then, as the driving component 8 continues to drive the right mounting seat 3 to move to the left, it drives the right rotating shaft 5 and the right bushing 7 to move to the left together, thereby causing the right boss 14 to abut against the fabric roll 11 and move to the left. As the fabric roll 11 moves to the left, the left bushing 6 and the left tensioning block 9 extend into the left end of the central hole 12, and then the left boss 13 abuts against the left end face of the fabric roll 11. Then, the drive component 8 continues to drive the right mounting base 3 to move to the left, thereby causing the right rotating shaft 5 to move to the left relative to the right bushing 7 and the left bushing 6 to move to the left relative to the left rotating shaft 4 under the thrust of the drive component 8. As the left bushing 6 moves to the left relative to the left rotating shaft 4, the left tensioning block 9 also moves to the left relative to the left rotating shaft 4. At this time, the left rotating shaft 4 abuts against the left tensioning block 9 and drives the left tensioning block 9 to move radially outward to tighten the inner wall of the central hole 12. When the right rotating shaft 5 moves to the left relative to the right bushing 7, the right rotating shaft 5 abuts against the right tensioning block 10 and drives the right tensioning block 10 to move radially outward to tighten the inner wall of the central hole 12, thereby tightening and fixing the fabric roll 11, thus completing the replacement and installation of the fabric roll 11. When the fabric roll 11 is unwound, the fabric roll 11, left bushing 6, right bushing 7, left tensioning block 9, right tensioning block 10, left rotating shaft 4, and right rotating shaft 5 will all rotate together. In this embodiment, the replacement and installation of the fabric roll 11 can be easily completed by simply using a handcart to transport the fabric roll 11 between the left bushing 6 and the right bushing 7, greatly reducing the difficulty of replacing and installing the fabric roll 11 and improving the convenience and efficiency of replacing and installing the fabric roll 11.

[0072] In this embodiment, multiple left tensioning blocks 9 are arranged evenly along the circumference of the left bushing 6, and multiple right tensioning blocks 10 are arranged evenly along the circumference of the right bushing 7. A left protrusion 13 is located on the left end of the left bushing 6 and protrudes radially outward, and a right protrusion 14 is located on the right end of the right bushing 7 and protrudes radially outward. The fabric roll 11 includes a central roll and fabric wound on the central roll. The central hole 12 is located in the central roll. The fabric can be a flow-guiding fabric. The left protrusion 13 abuts against the left end of the central roll, and the right protrusion 14 abuts against the right end of the central roll. More specifically, when replacing a new fabric roll 11, the center roll of the previous fabric roll 11 needs to be removed first. The operation steps are as follows: the right mounting base 3 is driven to the right by the drive component 8. At this time, the left rotating shaft 4 will release the clamping of the left tensioning block 9 and the right rotating shaft 5 will release the clamping of the right tensioning block 10. Then, both the left tensioning block 9 and the right tensioning block 10 can move radially inward to release the clamping of the inner wall of the center hole 12. Then, as the drive component 8 continues to drive the right mounting base 3 to move to the right, both the left bushing 6 and the right bushing 7 will exit from the center hole 12. Then, the center roll of the previous fabric roll 11 can be removed, and then the new fabric roll 11 can be installed.

[0073] like Figure 3 , 4 As shown, the left rotating shaft 4 is provided with a left limiting hole 15, and the left limiting hole 15 is provided with a left limiting boss 16 that protrudes radially inward. The left bushing 6 is connected to a left limiting rod 17 that extends into the left limiting hole 15. The left limiting rod 17 is provided with a left limiting step 18 that protrudes radially outward and is located to the left of the left limiting boss 16. The left limiting step 18 is used to abut against the left limiting boss 16 when the left bushing 6 moves to the right relative to the left rotating shaft 4 at its limit position to prevent the left bushing 6 from slipping off the left rotating shaft 4.

[0074] The right-hand rotating shaft 5 is provided with a right limiting hole 19, and a right limiting boss 20 protruding radially inward is provided in the right limiting hole 19. A right limiting rod 21 extending into the right limiting hole 19 is connected to the right bushing 7. The right limiting rod 21 is provided with a right limiting step 22 protruding radially outward and located to the right of the right limiting boss 20. The right limiting step 22 is used to abut against the right limiting boss 20 when the right bushing 7 moves to its extreme position to the left relative to the right-hand rotating shaft 5 to prevent the right bushing 7 from slipping off the right-hand rotating shaft 5. Specifically, the right end of the left bushing 6 is provided with a first end wall, and the left limiting rod 17 is connected to the first end wall. The left end of the right bushing 7 is provided with a second end wall, and the right limiting rod 21 is connected to the second end wall.

[0075] like Figures 1-4 As shown, the unwinding mechanism for the fabric roll may further include a left magnetic powder brake 23 and a right magnetic powder brake 24.

[0076] The left magnetic powder brake 23 is connected to the left mounting base 2 and connected to the left rotating shaft 4, and is used to apply rotational resistance to the left rotating shaft 4;

[0077] The right magnetic powder brake 24 is connected to the right mounting base 3 and connected to the right rotating shaft 5, and is used to apply rotational resistance to the right rotating shaft 5.

[0078] like Figures 3-5 As shown, the left rotating shaft 4 is provided with a left driving inclined surface 25 corresponding to the left tightening block 9, and the left tightening block 9 is provided with a left mating inclined surface 26 for abutting against the corresponding left driving inclined surface 25. The left driving inclined surface 25 on the left rotating shaft 4 is used to abut against the left mating inclined surface 26 on the corresponding left tightening block 9 when the left shaft sleeve 6 moves to the left relative to the left rotating shaft 4, and drive the left tightening block 9 to move radially outward to tighten the inner wall of the central hole 12.

[0079] The right rotating shaft 5 is provided with a right driving inclined surface 27 corresponding to the right tightening block 10. The right tightening block 10 is provided with a right mating inclined surface 28 for abutting against the corresponding right driving inclined surface 27. The right driving inclined surface 27 on the right rotating shaft 5 is used to abut against the right mating inclined surface 28 on the corresponding right tightening block 10 and drive the right tightening block 10 to move radially outward to tighten the inner wall of the central hole 12 when the right rotating shaft 5 moves to the left relative to the right bushing 7. In this embodiment, the left driving inclined surface 25 corresponds one-to-one with the left mating inclined surface 26, and the right driving inclined surface 27 corresponds one-to-one with the right mating inclined surface 28.

[0080] like Figures 3-5 As shown, the left rotating shaft 4 is provided with a left driving groove 29 corresponding to the left tightening block 9;

[0081] The left expansion block 9 has a left mating part 30 that fits into the corresponding left drive groove 29;

[0082] The left mating inclined surface 26 is provided on the left mating part 30;

[0083] The left drive inclined surface 25 is disposed at the bottom of the corresponding left drive groove 29;

[0084] The right rotating shaft 5 is provided with a right driving groove 31 corresponding to the right expansion block 10;

[0085] The right expansion block 10 has a right mating part 32 that fits into the corresponding right drive groove 31;

[0086] The right mating inclined surface 28 is provided on the right mating part 32;

[0087] The right drive inclined surface 27 is disposed at the bottom of the corresponding right drive groove 31; in this embodiment, the left expansion block 9 corresponds one-to-one with the left drive groove 29, and the right expansion block 10 corresponds one-to-one with the right drive groove 31.

[0088] like Figures 3-5 As shown, the left bushing 6 is provided with a left sliding hole 33 that corresponds to the left expansion block 9 and extends radially along the left bushing 6;

[0089] The left expansion block 9 also has a left abutment part 34 that is connected to the left mating part 30 and is radially slidably installed in the corresponding left sliding hole 33;

[0090] The left drive ramp 25 is used to abut against the left mating ramp 26 on the left mating part 30 when the left bushing 6 moves to the left relative to the left rotating shaft 4, and drive the left mating part 30 and the left abutting part 34 to move outward along the left sliding hole 33, thereby causing the left abutting part 34 to press against the inner wall of the center hole 12, thereby tightening the left end of the center hole 12.

[0091] The right bushing 7 is provided with a right sliding hole 35 that corresponds to the right expansion block 10 and extends radially along the right bushing 7;

[0092] The right expansion block 10 also has a right abutment part 36 that is connected to the right mating part 32 and is radially slidably installed in the corresponding right sliding hole 35;

[0093] The right drive ramp 27 is used to abut against the right mating ramp 28 on the right mating part 32 when the right rotating shaft 5 moves to the left relative to the right bushing 7, and drive the right mating part 32 and the right abutting part 36 to move outward along the right sliding hole 35, so that the right abutting part 36 abuts against the inner wall of the center hole 12, thereby tightening the right end of the center hole 12; in this embodiment, the left sliding hole 33 corresponds one-to-one with the left tightening block 9, and the right sliding hole 35 corresponds one-to-one with the right tightening block 10.

[0094] like Figures 3-5 As shown, the left rotating shaft 4 may include a left shaft body 37 and a left shaft head 38, and the right rotating shaft 5 may include a right shaft body 39 and a right shaft head 40;

[0095] The left shaft 37 is rotatably connected to the left mounting base 2, and the right shaft 39 is rotatably connected to the right mounting base 3. The rotation axis of the left shaft 37 is set in the left-right direction and coincides with the rotation axis of the right shaft 39.

[0096] The left shaft head 38 is connected to the right end of the left shaft body 37, and the right shaft head 40 is connected to the left end of the right shaft body 39.

[0097] The left shaft sleeve 6 is slidably sleeved on the left shaft head 38 in the left-right direction, and the right shaft sleeve 7 is slidably sleeved on the right shaft head 40 in the left-right direction;

[0098] The left drive ramp 25 is disposed on the left shaft head 38, and the right drive ramp 27 is disposed on the right shaft head 40.

[0099] In this embodiment, the left drive groove 29 is disposed on the left shaft head 38, the right drive groove 31 is disposed on the right shaft head 40, the left limiting hole 15 is disposed in the left shaft head 38, and the right limiting hole 19 is disposed in the right shaft head 40. When the left shaft sleeve 6 moves to its right limit position relative to the left shaft head 38, the left limiting step 18 abuts against the left limiting boss 16 to prevent the left shaft sleeve 6 from slipping off the left shaft head 38. When the right shaft sleeve 7 moves to its left limit position relative to the right shaft head 40, the right limiting step 22 abuts against the right limiting boss 20 to prevent the right shaft sleeve 7 from slipping off the right shaft head 40. The left magnetic powder brake 23 is connected to the left shaft body 37 in the left rotating shaft 4, and the right magnetic powder brake 24 is connected to the right shaft body 39 in the right rotating shaft 5. Specifically, the left shaft body 37 has a first flange portion 41, and the left shaft head 38 has a second flange portion 42. The first flange portion 41 and the second flange portion 42 are connected, thereby connecting the left shaft body 37 and the left shaft head 38. More specifically, the right shaft body 39 has a third flange portion 43, and the right shaft head 40 has a fourth flange portion 44. The third flange portion 43 and the fourth flange portion 44 are connected, thereby connecting the right shaft body 39 and the right shaft head 40.

[0100] like Figure 1 , 2 As shown, the driving component 8 can be a driving cylinder, which is connected to the frame 1 and connected to the right mounting base 3 and is used to drive the right mounting base 3 to move in the left and right direction.

[0101] like Figure 1 , 2 As shown in Figures 6, 7, and 8, the unwinding mechanism for the fabric roll may further include an adjusting mechanism. The left mounting base 2 is slidably connected to the frame 1 in the left-right direction. The adjusting mechanism is connected to the left mounting base 2 and is used to drive the left mounting base 2 to slide into position on the frame 1 in the left-right direction and lock the position of the left mounting base 2 on the frame 1.

[0102] like Figure 1 ,2 As shown in 6, 7, and 8, the adjustment mechanism includes, but is not limited to, the following structure: adjustment screw 45, adjustment block 46, first locking block 47, second locking block 48, and locking screw 49.

[0103] The adjusting block 46 is connected to the left mounting base 2;

[0104] The adjusting screw 45 is rotatably connected to the frame 1 and threadedly connected to the adjusting block 46. The adjusting screw 45 is driven to rotate, thereby causing the adjusting block 46 and the left mounting seat 2 to slide into position in the left-right direction.

[0105] The adjusting block 46 is provided with a locking hole 50, and the first locking block 47 and the second locking block 48 are both slidably installed in the locking hole 50;

[0106] The first locking block 47 is provided with a first locking surface 51 for abutting and cooperating with the outer wall of the adjusting screw 45;

[0107] The second locking block 48 is provided with a second locking surface 52 for abutting against the outer wall of the adjusting screw 45;

[0108] One end of the locking screw 49 passes through the first locking block 47 and is threadedly connected to the second locking block 48. The first locking block 47 and the locking screw 49 are in clearance fit. The locking screw 49 is also provided with a locking step 53 that abuts against the end face of the first locking block 47 facing away from the second locking block 48. The locking screw 49 is driven to rotate, thereby causing the first locking block 47 and the second locking block 48 to move towards each other, so that the first locking surface 51 and the second locking surface 52 abut against the outer wall of the adjusting screw 45. Specifically, when the locking screw 49 is driven to rotate, the thread can drive the second locking block 48 to move towards the first locking block 47, and the locking step 53 can limit the position of the first locking block 47, thereby causing the first locking block 47 and the second locking block 48 to move towards each other. When both the first locking surface 51 and the second locking surface 52 abut against the outer wall of the adjusting screw 45, the position of the adjusting screw 45 is locked and fixed, thereby locking and fixing the positions of the adjusting block 46 and the left mounting seat 2. In this embodiment, the first locking block 47 is located above the second locking block 48, the first locking surface 51 is located on the lower end of the first locking block 47, and the second locking surface 52 is located on the upper end of the second locking block 48. Both the first locking surface 51 and the second locking surface 52 are arc surfaces adapted to the outer wall of the adjusting screw 45. The locking step 53 abuts against the upper end face of the first locking block 47. An adjusting handwheel 54 for driving the adjusting screw 45 to rotate is connected to the adjusting screw 45, and a locking handwheel 55 for driving the locking screw 49 to rotate is connected to the locking screw 49.

[0109] In summary, when replacing and installing the fabric roll 11, simply place the fabric roll 11 on a handcart and then transport it between the left bushing 6 and the right bushing 7 using the handcart. The position of the left mounting base 2 remains fixed, and the driving component 8 drives the right mounting base 3 to move to the left. When the right mounting base 3 moves to the left, it will drive the right rotating shaft 5, the right bushing 7, and the right tensioning block 10 to move to the left together, thereby causing the right bushing 7 and the right tensioning block 10 to move to the right end of the center hole 12 inserted into the fabric roll 11. When the right bushing 7 is inserted into place, the right boss 14 will abut against the right end face of the fabric roll 11. Then, as the driving component 8 continues to drive the right mounting base 3 to move to the left, it will drive the right rotating shaft 5 and the right bushing 7 to move to the left together, thereby causing the right boss 14 to abut against the fabric roll 11 and move to the left. As the fabric roll 11 moves to the left, the left bushing 6 and the left tensioning block 9 extend into the left end of the central hole 12, and then the left boss 13 abuts against the left end face of the fabric roll 11. Then, the drive component 8 continues to drive the right mounting base 3 to move to the left, thereby causing the right rotating shaft 5 to move to the left relative to the right bushing 7 and the left bushing 6 to move to the left relative to the left rotating shaft 4 under the thrust of the drive component 8. As the left bushing 6 moves to the left relative to the left rotating shaft 4, the left tensioning block 9 also moves to the left relative to the left rotating shaft 4. At this time, the left rotating shaft 4 abuts against the left tensioning block 9 and drives the left tensioning block 9 to move radially outward to tighten the inner wall of the central hole 12. When the right rotating shaft 5 moves to the left relative to the right bushing 7, the right rotating shaft 5 abuts against the right tensioning block 10 and drives the right tensioning block 10 to move radially outward to tighten the inner wall of the central hole 12, thereby tightening and fixing the fabric roll 11, thus completing the replacement and installation of the fabric roll 11. When the fabric roll 11 is unwound, the fabric roll 11, left bushing 6, right bushing 7, left tensioning block 9, right tensioning block 10, left rotating shaft 4, and right rotating shaft 5 will all rotate together. In this embodiment, the replacement and installation of the fabric roll 11 can be easily completed by simply using a handcart to transport the fabric roll 11 between the left bushing 6 and the right bushing 7, greatly reducing the difficulty of replacing and installing the fabric roll 11 and improving the convenience and efficiency of replacing and installing the fabric roll 11.

[0110] The specific embodiments described above further illustrate the technical problems, technical solutions, and beneficial effects of this utility model. It should be understood that the above descriptions are merely specific embodiments of this utility model and are not intended to limit this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A fabric roll unwinding mechanism, characterized in that, Includes a frame, a left mounting base, a right mounting base, a left rotating shaft, a right rotating shaft, a left bushing, a right bushing, a drive unit, at least two left tension blocks, and at least two right tension blocks; The left mounting base is connected to the frame, and the right mounting base is slidably connected to the frame in the left-right direction; The left rotating shaft is rotatably connected to the left mounting base, and the right rotating shaft is rotatably connected to the right mounting base. The rotation axis of the left rotating shaft is set in the left-right direction and coincides with the rotation axis of the right rotating shaft. The left bushing is slidably sleeved on the left rotating shaft in the left direction and is used to extend into the left end of the central hole in the cloth roll. The left bushing is provided with a left protrusion for abutting against the left end face of the cloth roll. The right bushing is slidably sleeved on the right rotating shaft in the left-right direction and is used to extend into the right end of the center hole in the cloth roll. The right bushing is provided with a right protrusion for abutting against the right end face of the cloth roll. The left expansion block is slidably mounted on the left shaft sleeve along the radial direction of the left shaft sleeve; The right expansion block is slidably mounted on the right bushing along the radial direction of the right bushing; The driving component is connected to the right mounting base. When the fabric roll is located between the left bushing and the right bushing, the driving component drives the right mounting base to move to the left, thereby moving the right bushing and the right tensioning block to the left until they extend into the right end of the central hole and the right boss abuts against the right end face of the fabric roll. This causes the fabric roll to move to the left so that the left bushing and the left tensioning block extend into the left end of the central hole and the left boss abuts against the left end face of the fabric roll. This causes the right rotating shaft to move to the left relative to the right bushing and the left bushing to move to the left relative to the left rotating shaft. The left rotating shaft is used to abut against the left tightening block and drive the left tightening block to move radially outward to tighten the inner wall of the central hole when the left shaft sleeve moves to the left relative to the left rotating shaft. The right rotating shaft is used to abut against the right tightening block and drive the right tightening block to move radially outward to tighten the inner wall of the central hole when the right rotating shaft moves to the left relative to the right bushing.

2. The unwinding mechanism for fabric rolls according to claim 1, characterized in that, The left rotating shaft is provided with a left limiting hole, and the left limiting hole is provided with a left limiting boss that protrudes radially inward. A left limiting rod that extends into the left limiting hole is connected to the left shaft sleeve. The left limiting rod is provided with a left limiting step that protrudes radially outward and is located to the left of the left limiting boss. The left limiting step is used to abut against the left limiting boss when the left shaft sleeve moves to the right limit position relative to the left rotating shaft to prevent the left shaft sleeve from slipping off the left rotating shaft. The right-hand rotating shaft is provided with a right limiting hole, and the right limiting hole is provided with a right limiting boss that protrudes radially inward. A right limiting rod that extends into the right limiting hole is connected to the right bushing. The right limiting rod is provided with a right limiting step that protrudes radially outward and is located to the right of the right limiting boss. The right limiting step is used to abut against the right limiting boss when the right bushing moves to the left limit position relative to the right rotating shaft to prevent the right bushing from slipping off the right rotating shaft.

3. The unwinding mechanism for a cloth roll according to claim 1, characterized by It also includes a left magnetic powder brake and a right magnetic powder brake; The left magnetic powder brake is connected to the left mounting base and to the left rotating shaft, and is used to apply rotational resistance to the left rotating shaft; The right magnetic powder brake is connected to the right mounting base and to the right rotating shaft, and is used to apply rotational resistance to the right rotating shaft.

4. The unwinding mechanism for fabric rolls according to claim 1, characterized in that, The left rotating shaft is provided with a left driving inclined surface corresponding to the left tightening block. The left tightening block is provided with a left mating inclined surface for abutting against the corresponding left driving inclined surface. The left driving inclined surface on the left rotating shaft is used to abut against the left mating inclined surface on the corresponding left tightening block and drive the left tightening block to move radially outward to tighten the inner wall of the central hole when the left bushing moves to the left relative to the left rotating shaft. The right rotating shaft is provided with a right driving inclined surface corresponding to the right tightening block. The right tightening block is provided with a right mating inclined surface for abutting against the corresponding right driving inclined surface. The right driving inclined surface on the right rotating shaft is used to abut against the right mating inclined surface on the corresponding right tightening block and drive the right tightening block to move radially outward to tighten the inner wall of the central hole when the right rotating shaft moves to the left relative to the right bushing.

5. The unwinding mechanism for fabric rolls according to claim 4, characterized in that, The left rotating shaft is provided with a left driving groove corresponding to the left tensioning block; The left expansion block has a left mating part that fits into the corresponding left drive groove; The left mating inclined surface is provided on the left mating part; The left drive ramp is located at the bottom of the corresponding left drive slot; The right rotating shaft is provided with a right drive groove corresponding to the right expansion block; The right expansion block has a right mating part that fits into the corresponding right drive groove; The right mating inclined surface is provided on the right mating part; The right drive ramp is located at the bottom of the corresponding right drive slot.

6. The unwinding mechanism for fabric rolls according to claim 5, characterized in that, The left bushing is provided with a left sliding hole that corresponds to the left expansion block and extends radially along the left bushing; The left expansion block also has a left abutment portion that is connected to the left mating portion and is radially slidably installed in the corresponding left sliding hole; The left drive ramp is used to abut against the left mating ramp on the left mating part when the left bushing moves to the left relative to the left rotation axis, and drive the left mating part and the left abutting part to move outward along the left sliding hole, thereby causing the left abutting part to press against the inner wall of the center hole; The right bushing is provided with a right sliding hole that corresponds to the right expansion block and extends radially along the right bushing; The right expansion block also has a right abutment part that is connected to the right mating part and is radially slidably installed in the corresponding right sliding hole; The right drive ramp is used to abut against the right mating ramp on the right mating part when the right rotating shaft moves to the left relative to the right bushing, and drive the right mating part and the right abutting part to move outward along the right sliding hole, thereby causing the right abutting part to press against the inner wall of the center hole.

7. The unwinding mechanism for fabric rolls according to claim 4, characterized in that, The left-hand rotating shaft includes a left shaft body and a left shaft head, and the right-hand rotating shaft includes a right shaft body and a right shaft head; The left shaft is rotatably connected to the left mounting base, and the right shaft is rotatably connected to the right mounting base. The rotation axis of the left shaft is set in the left-right direction and coincides with the rotation axis of the right shaft. The left shaft head is connected to the right end of the left shaft body, and the right shaft head is connected to the left end of the right shaft body; The left shaft sleeve is slidably fitted onto the left shaft head in the left-right direction, and the right shaft sleeve is slidably fitted onto the right shaft head in the left-right direction. The left drive ramp is located on the left shaft head, and the right drive ramp is located on the right shaft head.

8. The roll-off mechanism for cloth rolls according to claim 1, wherein The driving component is a driving cylinder, which is connected to the frame and the right mounting base and is used to drive the right mounting base to move in the left and right direction.

9. The roll-off mechanism for cloth rolls according to claim 1, wherein It also includes adjustment mechanisms; The left mounting base is slidably connected to the frame in the left-right direction. The adjustment mechanism is connected to the left mounting base and is used to drive the left mounting base to slide into position on the frame in the left-right direction and then lock the position of the left mounting base on the frame.

10. The unwinding mechanism for fabric rolls according to claim 9, characterized in that, The adjustment mechanism includes an adjustment screw, an adjustment block, a first locking block, a second locking block, and a locking screw. The adjusting block is connected to the left mounting base; The adjusting screw is rotatably connected to the frame and threadedly connected to the adjusting block. The adjusting screw is driven to rotate, thereby causing the adjusting block and the left mounting seat to slide into position in the left-right direction. The adjusting block is provided with a locking hole, and both the first locking block and the second locking block are slidably installed in the locking hole; The first locking block is provided with a first locking surface for abutting and engaging with the outer wall of the adjusting screw; The second locking block is provided with a second locking surface for abutting and engaging with the outer wall of the adjusting screw; One end of the locking screw passes through the first locking block and is threadedly connected to the second locking block. The first locking block and the locking screw are in clearance fit. The locking screw is also provided with a locking step that abuts against the end face of the first locking block facing away from the second locking block. The locking screw is driven to rotate, thereby causing the first locking block and the second locking block to move towards each other, so that the first locking surface and the second locking surface abut against the outer wall of the adjusting screw.

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