CN217050834U - Unwinding device and winder - Google Patents

Abstract

The utility model provides an unwinding device and winder, include: the device comprises a driving part, a rotating part, an expansion assembly and an adjusting part; the driving part is connected with the rotating part to drive the rotating part to rotate; the rotating part is provided with a rolling position, and the material roll is sleeved outside the rotating part and arranged corresponding to the rolling position; the expansion assembly is connected with the rotating part and is arranged corresponding to the rolling position; the adjusting part is arranged in the rotating part and is matched with the expansion assembly to realize the adjustment of the radial relative position of the expansion assembly along the rotating part; wherein, the tight subassembly of bloating is adjusted along the radial production displacement of rotating part to the regulation portion to realize the material book with corresponding bloated tightly, the material book after the bloated tightly rotates with the rotating part synchronous revolution. The utility model discloses a set up the regulating part in the inside of rotation portion, reduced the problem that the regulating part took great space in the outside, owing to shortened transmission distance, the stability of slender rod structure has also obtained the reinforcing simultaneously.

Description

Unwinding device and winding machine

Technical Field

The utility model relates to the technical field of machinery, especially, relate to an unwinding device and winder.

Background

The cell is usually manufactured by a winding process, and the corresponding equipment is a winding machine. The unreeling speed and the automation degree determine the production cost of the battery cell. The electric core manufacture equipment structure on the existing market is complicated, the internal overhaul space is not enough, and because the transmission shaft is longer, the transient impact is not favorable for guaranteeing the stability of the slender rod structure.

SUMMERY OF THE UTILITY MODEL

The utility model provides an unwinding device and winder for solve the defect that the existing equipment structure is complicated, the inside maintenance space is not enough, through setting up the regulating part in the inside of rotation portion, reduced the regulating part and taken the problem in great space in the outside, owing to shortened transmission distance simultaneously, the stability of slender rod structure has also obtained the reinforcing.

According to the utility model discloses the first aspect provides an unwinding device, include: the device comprises a driving part, a rotating part, an expansion assembly and an adjusting part;

the driving part is connected with the rotating part to drive the rotating part to rotate;

the rotating part is provided with a rolling position, and a material roll is sleeved outside the rotating part and arranged corresponding to the rolling position;

the expansion assembly is connected with the rotating part and is arranged corresponding to the rolling position;

the adjusting part is arranged in the rotating part and is matched with the expansion assembly to adjust the relative position of the expansion assembly along the radial direction of the rotating part;

the adjusting part adjusts the expansion assembly to generate displacement along the radial direction of the rotating part so as to realize expansion with the corresponding material roll, and the material roll after expansion rotates synchronously with the rotating part.

It should be noted that the adjusting part is arranged on the inner side of the rotating part, so that the problem that the adjusting part occupies the overhaul space in the whole cabinet and is inconvenient to maintain is solved.

According to the utility model discloses an embodiment, the rotation portion includes: an expansion sleeve and an end cover;

one end of the expansion sleeve is connected with the driving part, and the other end of the expansion sleeve is connected with the end cover;

the expansion assembly is connected with the expansion sleeve and synchronously rotates with the expansion sleeve;

the adjusting part is arranged inside the rotating part and connected with the end cover;

a plurality of openings are uniformly distributed on the circumferential surface of the expansion sleeve;

the expansion assembly passes through the opening, and the relative position of the expansion sleeve is adjusted in the radial direction.

Specifically, the present embodiment provides an implementation of a rotating portion, which provides a passage for adjusting the radial displacement of the expansion sleeve of the expansion assembly by forming a plurality of openings on the expansion sleeve.

According to the utility model discloses an embodiment, the tight subassembly that expands includes: the expansion block and the guide block;

the expansion blocks and the openings are arranged in a one-to-one correspondence manner;

the guide blocks and the expansion blocks are arranged in a one-to-one correspondence manner;

the adjusting portion is matched with the guide block and drives the guide block to move along the axial direction of the rotating portion so as to adjust the radial relative position of the expansion block along the rotating portion, and the expansion of the expansion block and the material roll is realized.

Particularly, this embodiment provides an embodiment of the tight subassembly that expands, the setting of guide block, the displacement of the tight piece that expands is adjusted through the guide block to the regulation portion of being convenient for, and the guide block has played the transmission power effect promptly.

According to the utility model discloses an embodiment, regulation portion includes: the positioning plate, the adjusting power unit and the expansion shaft are arranged on the base;

the positioning plate is arranged in the expansion sleeve at intervals with the end cover and synchronously rotates with the expansion sleeve;

the expansion assembly is arranged between the positioning plate and the end cover;

the adjusting power unit is connected with the end cover;

one end of the expansion shaft is connected with the adjusting power unit, and the other end of the expansion shaft penetrates through the guide block and is rotationally connected with the positioning plate;

the expansion shaft drives the guide block to move along the axial direction of the expansion sleeve under the action of the adjusting power unit;

the expansion block moves along the radial direction of the expansion sleeve in the axial movement process of the guide block along the expansion sleeve, so that the expansion of the material roll is realized.

Particularly, this embodiment provides an implementation mode of regulating part, has realized the support to the mandril that expands through setting up the locating plate, adjusts power unit then and has realized the regulation to the mandril that expands along the relative position of the cover axial that expands.

According to the utility model discloses an embodiment, adjust the power pack with expand and realize connecting through the damping unit between the mandril.

Specifically, the embodiment provides an implementation mode of connecting the power unit and the expansion shaft, and by arranging the damping unit, the problem of stress concentration caused by torsion in the synchronous rotation process of the power unit and the expansion shaft is avoided.

According to the utility model discloses an embodiment, the guide block includes: a block body and a guide groove;

a first through hole for the expansion shaft to pass through is formed in the center of the block body;

the guide grooves are uniformly distributed on the surface of the block body along the circumferential direction and correspond to the expansion blocks one by one;

the matching surface of the guide groove and the expansion block is arranged in a wedge-shaped manner along the axial direction of the block body.

Specifically, this embodiment provides an implementation mode of guide block, and the setting of guide way for when the piece body moves along the cover axial that expands, through the radial production displacement of the tight piece of wedge drive along the cover that expands.

It should be noted that the block body is in surface contact with the expansion block through the guide groove, and the expansion block is in radial displacement along the expansion sleeve under the action of the wedge-shaped surface, so as to be tensioned with the material roll.

According to the utility model discloses an embodiment, regulation portion still includes: the gas-supply pipe, the gas-supply pipe certainly one side of locating plate stretches into, and passes through second through hole on the piece body, with adjust the power pack and connect, in order to realize to adjust the power pack air feed.

Specifically, the embodiment provides another implementation mode of the regulating part, and the air conveying pipe is arranged to supply power gas for the regulating power unit from the outside of the device.

According to the utility model discloses an embodiment, regulation portion still includes: a guide bar and an elastic unit;

one end of the guide rod is connected with the positioning plate, and the other end of the guide rod is inserted into the second through hole in the block body;

the elastic unit is sleeved outside the guide rod, one end of the elastic unit is abutted to the positioning plate, and the other end of the elastic unit is abutted to the end face of the block body.

Particularly, the embodiment provides an implementation mode of another adjusting part, and through setting up the guide bar, guaranteed the guide block pivoted stability, when avoiding the cover that expands to rotate, the guide block takes place the drunkenness.

Further, the elastic unit 48 provides elastic force for the resetting of the guide block 33, and is matched with the guide rod, so that the guide block is more stable in axial sliding along the guide rod, and the occurrence of play is avoided.

According to the utility model discloses an embodiment, at least two tight subassembly of expanding is followed the axial interval of rotation portion sets up.

Particularly, this embodiment provides the embodiment of the tight subassembly quantity of expanding, and the tensioning to a plurality of materials of rolling has been realized to the setting of a plurality of tight subassemblies that expand, satisfies the demand in the difference.

According to the utility model discloses an embodiment still includes: the device comprises a base, a slide rail, a movable seat and a deviation rectifying power unit;

the movable seat is in sliding connection with the base through the sliding rail;

the deviation rectifying power unit is connected with the movable seat;

wherein, the drive part, the rotation part, the tight subassembly that expands and the regulation part respectively direct or indirect set up in remove the seat.

Particularly, this embodiment provides a base, slide rail, remove the seat and the embodiment of the power pack that rectifies, through setting up base, slide rail, remove the seat and the power pack that rectifies, realized the regulation to drive division, rotation portion, bloated tight subassembly and regulation portion relative position for unreeling the in-process and taking place the displacement, result in unreeling the position and in time correcting when changing, perhaps because the correspondence that unreels puts the position change, and need roll up and in time adjust when rolling up the fine setting of material unreeling the position.

According to the utility model discloses the second aspect provides a winder has foretell unwinding device.

The utility model provides an above-mentioned one or more technical scheme has one of following technological effect at least: the utility model provides a pair of unwinding device and winder through setting up the regulating part in the inside of rotation portion, has reduced the problem that the regulating part took great space in the outside, simultaneously owing to shortened transmission distance, the stability of slender rod structure has also obtained the reinforcing.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

In order to more clearly illustrate the technical solutions of the present invention or the prior art, the drawings required for the embodiments or the prior art descriptions will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is one of the schematic views illustrating the assembly relationship of the unwinding device according to the present invention;

fig. 2 is a second schematic view illustrating an assembly relationship of the unwinding device according to the present invention;

fig. 3 is a schematic structural diagram of the guide block in the unwinding device provided by the present invention.

Reference numerals:

10. a drive section;

20. a rotating part; 21. expanding the sleeve; 22. an end cap;

30. an expansion assembly; 31. expanding and tightening blocks; 32. a guide block; 321. a block body; 322. a guide groove; 323. a first through hole; 324. a second through hole;

40. positioning a plate; 41. adjusting the power unit; 42. expanding and tightening the shaft; 43. a gas delivery pipe; 44. a guide rod; 45. an elastic unit; 46. a damping unit;

50. a base; 51. a slide rail; 52. a movable seat; 53. and a deviation rectifying power unit.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

In the description of the embodiments of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of describing the embodiments of the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the embodiments of the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In some embodiments of the present invention, as shown in fig. 1 to 3, the present solution provides an unwinding device, including: the device comprises a driving part 10, a rotating part 20, an expansion assembly 30 and an adjusting part; the driving part 10 is connected with the rotating part 20 to drive the rotating part 20 to rotate; the rotating part 20 is provided with a rolling position, and the material roll is sleeved outside the rotating part 20 and is arranged corresponding to the rolling position; the expansion assembly 30 is connected with the rotating part 20 and is arranged corresponding to the rolling position; the adjusting part is arranged inside the rotating part 20 and is matched with the expansion assembly 30 so as to adjust the relative position of the expansion assembly 30 along the radial direction of the rotating part 20; wherein, the adjusting part adjusts the expansion assembly 30 to generate displacement along the radial direction of the rotating part 20, so as to realize expansion with the corresponding material roll, and the expanded material roll rotates synchronously with the rotating part 20.

In detail, the utility model provides an unwinding device for solve the defect that the existing equipment structure is complicated, the inside overhauls the space not enough, through setting up the regulating part in the inside of rotation portion 20, reduced the problem that the regulating part took great space in the outside, owing to shortened transmission distance, the stability of slender rod structure has also obtained the reinforcing simultaneously.

It should be noted that, the adjusting portion is disposed inside the rotating portion 20, so as to avoid the problem that the adjusting portion occupies the overhaul space in the entire cabinet, which is inconvenient for maintenance.

In a possible embodiment, the driving portion 10 is a driving motor, and the power supply for rotating the rotating portion 20 is realized through a transmission manner such as a gear.

In a possible embodiment, the driving part 10 is also connected to the rotating part 20 by a frame, on which a corresponding gear transmission mechanism or the like is arranged, which enables the power of the driving part 10 to be transmitted to the rotating part 20.

In some possible embodiments of the present invention, the rotating portion 20 includes: an expansion sleeve 21 and an end cap 22; one end of the expansion sleeve 21 is connected with the driving part 10, and the other end of the expansion sleeve 21 is connected with the end cover 22; the expansion assembly 30 is connected with the expansion sleeve 21 and synchronously rotates with the expansion sleeve 21; the adjusting part is arranged inside the rotating part 20 and is connected with the end cover 22; wherein, a plurality of openings are uniformly distributed on the circumferential surface of the expansion sleeve 21; the expansion assembly 30 passes through the opening to realize the relative position adjustment along the radial direction of the expansion sleeve 21.

Specifically, the present embodiment provides an embodiment of the rotating portion 20, which provides a passage for the expansion assembly 30 to adjust the radial displacement of the expansion sleeve 21 by forming a plurality of openings in the expansion sleeve 21.

In some possible embodiments of the present invention, the expansion assembly 30 includes: an expansion block 31 and a guide block 32; the expansion blocks 31 are arranged corresponding to the openings one by one; the guide blocks 32 are arranged corresponding to the expansion blocks 31 one by one; wherein, the adjustment portion cooperates with guide block 32 to drive guide block 32 along the axial removal of rotating part 20, in order to adjust bloated tight piece 31 along the radial relative position of rotating part 20, realize bloated tight piece 31 and the bloated tight of material book.

Specifically, the present embodiment provides an embodiment of the expansion assembly 30, and the guide block 32 is disposed so that the adjusting portion adjusts the displacement of the expansion block 31 through the guide block 32, that is, the guide block 32 plays a role of transmitting power.

In some possible embodiments of the present invention, the adjusting portion includes: a positioning plate 40, an adjusting power unit 41 and an expansion shaft 42; the positioning plate 40 is arranged in the expansion sleeve 21 at intervals with the end cover 22 and synchronously rotates with the expansion sleeve 21; the expansion assembly 30 is disposed between the positioning plate 40 and the end cap 22; the adjusting power unit 41 is connected with the end cover 22; one end of the expansion shaft 42 is connected with the adjusting power unit 41, and the other end of the expansion shaft 42 is rotatably connected with the positioning plate 40 after penetrating through the guide block 32; wherein, the expansion shaft 42 drives the guide block 32 to move along the axial direction of the expansion sleeve 21 under the action of the adjusting power unit 41; the expansion block 31 moves along the radial direction of the expansion sleeve 21 in the process that the guide block 32 moves along the axial direction of the expansion sleeve 21, so that the expansion with the material roll is realized.

Specifically, the present embodiment provides an embodiment of an adjusting portion, in which the positioning plate 40 is arranged to support the expansion shaft 42, and the adjusting power unit 41 is arranged to adjust the relative position of the expansion shaft 42 along the axial direction of the expansion sleeve 21.

In some possible embodiments of the present invention, the connection between the adjusting power unit 41 and the tightening shaft 42 is realized through the damping unit 46.

Specifically, the present embodiment provides an implementation manner of connecting the adjusting power unit 41 and the expansion shaft 42, and by providing the damping unit 46, the problem of stress concentration caused by torsion during the synchronous rotation of the adjusting power unit 41 and the expansion shaft 42 is avoided.

In some possible embodiments of the present invention, the guide block 32 includes: a block body 321 and a guide groove 322; the center of the block body 321 is provided with a first passing hole 323 for the expansion shaft 42 to pass through; the plurality of guide grooves 322 are uniformly distributed on the surface of the block body 321 along the circumferential direction and correspond to the expansion blocks 31 one by one; the matching surface of the guide groove 322 and the expansion block 31 is a wedge surface along the axial direction of the block body 321.

Specifically, the embodiment of the guide block 32 is provided, and the guide groove 322 is configured to drive the expansion block 31 to displace along the radial direction of the expansion sleeve 21 through the wedge surface when the block body 321 moves along the axial direction of the expansion sleeve 21.

It should be noted that the block body 321 realizes surface contact with the expansion block 31 through the guide groove 322, and the expansion block 31 realizes displacement along the radial direction of the expansion sleeve 21 under the action of the wedge-shaped surface, so as to be tensioned with the material roll.

In some possible embodiments of the present invention, the adjusting portion further includes: and the air pipe 43 extends into one side of the positioning plate 40, passes through the second through hole 324 in the block body 321 and is connected with the adjusting power unit 41 so as to supply air to the adjusting power unit 41.

Specifically, in the present embodiment, another embodiment of the regulating portion is provided, and the air pipe 43 is provided to supply the power gas to the regulating power unit 41 from the outside of the device.

In some possible embodiments of the present invention, the adjusting portion further includes: a guide rod 44 and an elastic unit 45; one end of the guide rod 44 is connected with the positioning plate 40, and the other end of the guide rod 44 is inserted into the second through hole 324 on the block body 321; the elastic unit 45 is sleeved outside the guide rod 44, one end of the elastic unit 45 abuts against the positioning plate 40, and the other end of the elastic unit 45 abuts against the end face of the block body 321.

Specifically, the present embodiment provides another embodiment of the adjusting portion, and the guide rod 44 is provided to ensure the stability of the rotation of the guide block 32 and prevent the guide block 32 from moving when the expansion sleeve 21 rotates.

Further, the elastic unit 4548 is configured to provide an elastic force for resetting the guide block 3233, and simultaneously cooperate with the guide rod 44, so that the guide block 32 is more stable when sliding along the axial direction of the guide rod 44, and play is prevented.

In a possible embodiment, the guide rod 44 is connected with the block body 321 through the second through hole 324, the guide rod 44 is provided with a hollow structure, the air pipe 43 penetrates the hollow guide rod 44, and the supply of the power gas to the adjusting power unit 41 through the second through hole 324 is realized.

In some possible embodiments of the present invention, at least two expansion assemblies 30 are disposed along the axial interval of the rotating portion 20.

Specifically, the present embodiment provides an implementation of the number of the expansion assemblies 30, and the arrangement of a plurality of expansion assemblies 30 realizes the tensioning of a plurality of material rolls, thereby meeting different requirements.

In some possible embodiments of the present invention, further comprising: the device comprises a base 50, a slide rail 51, a movable seat 52 and a deviation rectifying power unit 53; the movable seat 52 is in sliding connection with the base 50 through a sliding rail 51; the deviation rectifying power unit 53 is connected with the movable base 52; wherein, the driving part 10, the rotating part 20, the expansion assembly 30 and the adjusting part are respectively directly or indirectly arranged on the movable base 52.

Specifically, the embodiment provides an implementation manner of the base 50, the slide rail 51, the moving seat 52 and the deviation rectifying power unit 53, and by setting the base 50, the slide rail 51, the moving seat 52 and the deviation rectifying power unit 53, the adjustment of the relative positions of the driving part 10, the rotating part 20, the expansion assembly 30 and the adjusting part is realized, so that the displacement occurs during the unwinding process, and the unwinding position is corrected in time when being changed, or the unwinding position needs to be adjusted in time when fine adjustment of the unwinding position of the material roll is required due to the change of the corresponding unwinding position.

In some embodiments of the present invention, the present invention provides a winding machine, which has the unwinding device.

In the description of the embodiments of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "connected" and "connected" should be interpreted broadly, and may be, for example, a fixed connection, a detachable connection, or an integral connection; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the embodiments of the present invention can be understood by those of ordinary skill in the art according to specific situations.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "a manner," "a particular manner," or "some manner" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or manner is included in at least one embodiment or manner of an embodiment of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or mode. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or modes. Furthermore, various embodiments or modes described in this specification, as well as features of various embodiments or modes, may be combined and combined by those skilled in the art without contradiction.

Finally, it should be noted that: the above embodiments are only for illustrating the present invention, and are not to be construed as limiting the present invention. Although the present invention has been described in detail with reference to the embodiments, it should be understood by those skilled in the art that various combinations, modifications or equivalent substitutions may be made to the technical solution of the present invention without departing from the spirit and scope of the technical solution of the present invention, and all of the technical solutions should be covered by the scope of the claims of the present invention.

Claims (11)

1. The utility model provides an unwinding device which characterized in that includes: the device comprises a driving part (10), a rotating part (20), an expansion assembly (30) and an adjusting part;

the driving part (10) is connected with the rotating part (20) to drive the rotating part (20) to rotate;

the rotating part (20) is provided with a rolling position, and a material roll is sleeved outside the rotating part (20) and arranged corresponding to the rolling position;

the expansion assembly (30) is connected with the rotating part (20) and is arranged corresponding to the rolling position;

the adjusting part is arranged inside the rotating part (20) and is matched with the expansion assembly (30) to adjust the relative position of the expansion assembly (30) along the radial direction of the rotating part (20);

the adjusting part adjusts the expansion assembly (30) to generate displacement along the radial direction of the rotating part (20) so as to realize expansion of the material roll corresponding to the expansion assembly, and the expanded material roll and the rotating part (20) rotate synchronously.

2. Unwinding device according to claim 1, characterised in that said rotating portion (20) comprises: an expansion sleeve (21) and an end cover (22);

one end of the expansion sleeve (21) is connected with the driving part (10), and the other end of the expansion sleeve (21) is connected with the end cover (22);

the expansion assembly (30) is connected with the expansion sleeve (21) and synchronously rotates with the expansion sleeve (21);

the adjusting part is arranged inside the rotating part (20) and is connected with the end cover (22);

wherein a plurality of openings are uniformly distributed on the circumferential surface of the expansion sleeve (21);

the expansion assembly (30) is used for realizing radial adjustment of relative positions along the expansion sleeve (21) through the opening.

3. Unwinding device according to claim 2, wherein the expansion assembly (30) comprises: an expansion block (31) and a guide block (32);

the expansion blocks (31) are arranged in one-to-one correspondence with the openings;

the guide blocks (32) and the expansion blocks (31) are arranged in a one-to-one correspondence manner;

the adjusting portion is matched with the guide block (32) and drives the guide block (32) to move along the axial direction of the rotating portion (20) so as to adjust the radial relative position of the expansion block (31) along the rotating portion (20), and the expansion of the expansion block (31) and the material roll is achieved.

4. The unwinding device as claimed in claim 3, wherein the adjusting portion comprises: the device comprises a positioning plate (40), an adjusting power unit (41) and an expansion shaft (42);

the positioning plate (40) is arranged in the expansion sleeve (21) and spaced from the end cover (22), and rotates synchronously with the expansion sleeve (21);

the expansion assembly (30) is arranged between the positioning plate (40) and the end cover (22);

the adjusting power unit (41) is connected with the end cover (22);

one end of the expansion shaft (42) is connected with the adjusting power unit (41), and the other end of the expansion shaft (42) penetrates through the guide block (32) and then is rotatably connected with the positioning plate (40);

the expansion shaft (42) drives the guide block (32) to move along the axial direction of the expansion sleeve (21) under the action of the adjusting power unit (41);

and the expansion block (31) moves along the radial direction of the expansion sleeve (21) in the process that the guide block (32) moves along the axial direction of the expansion sleeve (21) to realize the expansion with the material roll.

5. Unwinding device according to claim 4, characterised in that the connection between the adjustment power unit (41) and the expansion shaft (42) is provided by means of a damping unit (46).

6. Unwinding device according to claim 4, characterised in that said guide block (32) comprises: a block body (321) and a guide groove (322);

the center of the block body (321) is provided with a first through hole (323) for the expansion shaft (42) to pass through;

the guide grooves (322) are uniformly distributed on the surface of the block body (321) along the circumferential direction and correspond to the expansion blocks (31) one by one;

the matching surface of the guide groove (322) and the expansion block (31) is arranged in a wedge-shaped manner along the axial direction of the block body (321).

7. The unwinding device as claimed in claim 6, wherein the adjusting portion further comprises: gas-supply pipe (43), gas-supply pipe (43) certainly one side of locating plate (40) stretches into, and passes through second through hole (324) on piece body (321), with adjust power pack (41) and connect, in order to realize to adjust power pack (41) air feed.

8. The unwinding device as claimed in claim 6, wherein the adjusting portion further comprises: a guide rod (44) and an elastic unit (45);

one end of the guide rod (44) is connected with the positioning plate (40), and the other end of the guide rod (44) is inserted into a second through hole (324) in the block body (321);

the elastic unit (45) is sleeved outside the guide rod (44), one end of the elastic unit (45) is abutted to the positioning plate (40), and the other end of the elastic unit (45) is abutted to the end face of the block body (321).

9. Unwinding device according to any one of claims 1 to 8, characterised in that at least two said expansion assemblies (30) are axially spaced apart along said rotating portion (20).

10. The unwinding device of any one of claims 1 to 8, further comprising: the device comprises a base (50), a slide rail (51), a movable seat (52) and a deviation rectifying power unit (53);

the moving seat (52) is in sliding connection with the base (50) through the sliding rail (51);

the deviation rectifying power unit (53) is connected with the movable seat (52);

wherein the driving part (10), the rotating part (20), the expansion assembly (30) and the adjusting part are respectively directly or indirectly arranged on the movable seat (52).

11. A winding machine, characterized by having an unwinding device according to any one of claims 1 to 10.

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