Hand expansion reel and winding and unwinding equipment

Abstract

The utility model discloses a hand expansion reel and winding and unwinding equipment thereof. The hand-expanding reel comprises a central shaft assembly, a knob, a first end seat, a second end seat and a sleeve assembly. The first end of a center shaft of the center shaft assembly is provided with external threads, the radial section is in a major arc shape, and a cylindrical spring is sleeved. The first end seat movably sleeves the first end of the central shaft without circumferential rotation, and the inner side of the first end seat abuts against the cylindrical spring. And the rest end of the central shaft can be fixedly sleeved in the end seat blind hole of the second end seat in an axial sliding manner. The inner side of the knob abuts against the first end seat. One end of a supporting cylinder of the sleeve assembly is fixedly assembled on the inner side face of the first end base, and the other end is fixedly assembled on the inner side face of the second end base. By rotating the knob, the central shaft assembly slides in two directions in the axial direction, and therefore the outer diameter of the sleeve assembly is changed.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the reel take-up equipment field, and specifically relates to a reel with variable outer diameter, and further relates to a reel take-up device comprising such a reel. BACKGROUND

[0002] The reel take-up device without a core disclosed in Chinese patent CN215710818U / 2022 can be referred to as a hand-expanding reel, which comprises a driving turntable and a flange head. A lead screw between the driving turntable and the flange head is in threaded engagement with two circular tables (conical members). The two ends of the top-expanding tube are slidably located on the conical surfaces of the two circular tables. When the outer diameter of the reel is changed, the lead screw and the top-expanding tube are relatively rotated, so that the two circular tables are close to or away from each other along the lead screw, and the components of the top-expanding tube are synchronously lifted radially and opened circumferentially. SUMMARY

[0003] The technical problem to be solved by the utility model is how to improve the reel diameter changing mechanism to facilitate operation.

[0004] In this specification, unless otherwise specified, the inside, the outside, the radial direction, the axial direction and the circumferential direction are all based on the overall outline of the hand-expanding reel.

[0005] The utility model discloses a hand-expanding reel.

[0006] The hand-expanding reel is used for the take-up of a strip-shaped material, and comprises:

[0007] A set of central shaft assembly comprises a central shaft, a first conical member, a second conical member, an annular limiting member and a cylindrical spring. The first conical member and the second conical member are fixedly sleeved on the central shaft with the pointed ends facing the first end of the central shaft. The first conical member is located in the middle of the central shaft. The annular limiting member is fixedly sleeved on the central shaft and located between the first conical member and the first end of the central shaft. The central shaft outside the annular limiting member is provided with external threads and the radial section is in the shape of an arcuate bow. The cylindrical spring is sleeved on the first end of the central shaft and abuts against the annular limiting member.

[0008] A first end seat is in the shape of a plate and is provided with a central through hole. The first end seat is axially slidably and non-circumferentially rotatably sleeved on the first end of the central shaft and abuts against the cylindrical spring on the inside.

[0009] A knob is engaged on the first end of the central shaft through a central threaded through hole and abuts against the first end seat on the inside.

[0010] A second end seat is configured to be a sleeve connection part. The sleeve connection part comprises a plate-shaped main body. A blind hole for the end seat is formed in the center of the inner side surface of the plate-shaped main body. The blind hole for the end seat is axially slidably sleeved on the remaining end of the central shaft. In addition, the second end seat is connected to a reel take-up device on one end and is configured to be a sleeve connection part on the other end.

[0011] A sleeve assembly includes a support cylinder, at least two arc-shaped tiles and a plurality of wedge-shaped members, all the arc-shaped tiles are circumferentially and evenly movably covered on the outer side of the support cylinder, each wedge-shaped member is radially slidably penetrated through the support cylinder and connected with the inner wall of the arc-shaped tile at the outer end, each arc-shaped tile is connected with two wedge-shaped members, one of the two wedge-shaped members is matched with the conical surface of the first conical member at the inner end, and the other is matched with the conical surface of the second conical member at the inner end.

[0012] The support cylinder is fixedly assembled at the inner side of the first end seat at one axial end and fixedly assembled at the inner side of the second end seat at the other axial end.

[0013] In some embodiments of the utility model, the first end seat and the second end seat are assembled into one body with the support cylinder through a plurality of countersunk screws.

[0014] In some embodiments of the utility model, the side surface of the wedge-shaped member towards the first end of the central axis is partially concave to form a hook, and the sleeve assembly further includes two elastic rings, one of which is sleeved on the hook of the wedge-shaped member corresponding to the first conical member, and the other is sleeved on the hook of the wedge-shaped member corresponding to the second conical member.

[0015] In some embodiments of the utility model, the outer wall of the support cylinder is provided with a plurality of positioning grooves and the inner wall is provided with a plurality of axially extending protrusions, the arc-shaped tile is matched with the positioning groove in a one-to-one gap and corresponds to at least one protrusion, and the inner end of the wedge-shaped member penetrates through the corresponding protrusion in the radial direction.

[0016] In some embodiments of the utility model, the inner wall of the arc-shaped tile is provided with an axially extending trapezoidal through groove, and the outer end face of the wedge-shaped member is edge-protruding and used for clamping into the trapezoidal through groove.

[0017] In some embodiments of the utility model, the hand expansion reel further includes:

[0018] A turntable bearing is axially movably sleeved on the central shaft and located between the knob and the first end seat, and the turntable face is towards the knob.

[0019] The utility model discloses a kind of winding and unwinding equipment. The winding and unwinding equipment is used for the winding and unwinding of strip material, and the winding and unwinding equipment includes a rotating part, and the rotating part is installed with the hand expansion reel described above.

[0020] The technical scheme of the utility model is implemented, and the following beneficial effects can be obtained.

[0021] The utility model discloses a hand expansion reel and reel equipment thereof. Hand expansion reel includes center shaft subassembly, knob, first end seat, second end seat and sleeve subassembly. The center shaft first end of center shaft subassembly is equipped with external thread, radial section is superior arc bow shape, and sleeve joint cylinder spring. The first end seat is movably sleeved in the center shaft first end and can not rotate in the circumference, and the inboard side of the first end seat is in contact with the cylinder spring. The remaining one end of the center shaft is fixedly sleeved in the end seat blind hole of the second end seat and can axially slide. The knob is threadedly engaged in the center shaft first end, and the inboard side of the knob is in contact with the first end seat. The supporting cylinder of sleeve subassembly is fixedly assembled on the inboard side of the first end seat at one end, and is fixedly assembled on the inboard side of the second end seat at the other end. By rotating the knob, the center shaft subassembly axially slides in two directions, thereby changing the outer diameter of the sleeve subassembly. BRIEF DESCRIPTION OF DRAWINGS

[0022] The following drawings should be used in conjunction with the detailed description section.

[0023] Figure 1 It is the front view schematic diagram of the hand expansion reel of example one, and the outer diameter is adjusted to the minimum, and the limit bolt pair is not drawn;

[0024] Figure 2 It is Figure 1 It is the radial section schematic diagram of B-B in the middle, and the limit bolt pair is not drawn;

[0025] Figure 3 It is the assembly structure schematic diagram of the limit bolt pair in example one;

[0026] Figure 4a It is the three-dimensional schematic diagram of the hand expansion reel of example one, and one arc tile and the supporting inner cylinder are removed to show the inside, and the limit bolt pair is not drawn, and the bidirectional arrow represents that the center shaft can slide in two directions;

[0027] Figure 4b It is the three-dimensional schematic diagram of the supporting cylinder in example one, and the Figure 4a view is consistent;

[0028] Figure 5 It is the three-dimensional schematic diagram of a wedge in example one;

[0029] Figure 6 It is the front view schematic diagram of the center shaft in example one;

[0030] Figure 7 It is the three-dimensional schematic diagram of the second end seat in example one, and the inboard side is shown;

[0031] Figure 8a It is the assembly structure schematic diagram of the first end seat in example one;

[0032] Figure 8bis a perspective view of the first end seat in Example One, showing the outer side;

[0033] Figure 9a is a perspective view of the knob in Example One, showing the outer side;

[0034] Figure 9b is another perspective view of the knob in Example One, showing the inner side. DETAILED DESCRIPTION

[0035] The embodiments will be described below with reference to the accompanying drawings.

[0036] In this specification, unless specifically stated otherwise, one embodiment, some embodiments and other embodiments are used to distinguish different embodiments, and do not mean all embodiments; the drawings are schematic drawings, not proportional drawings; the directions / positions of top, bottom, center, edge, far, near, long, wide, vertical, horizontal, upper, lower, front, back, left, right, etc. are based on the observation angle of the drawings, and cannot be understood as that the components / devices are located at a specific position, facing a specific direction; the first, second, third, etc. ordinal words are used to distinguish components / devices with the same function / name, and do not have the meaning of sequence.

[0037] In this specification, unless specifically stated otherwise, the inner side, the outer side, the radial direction, the axial direction and the circumferential direction are based on the overall outline of the hand expansion reel.

[0038] In this specification, the through slot and the through groove both refer to a slot with two opposite openings in the side wall, which can be named by the cross-sectional shape, such as a T-shaped through slot.

[0039] Example One

[0040] A hand expansion reel 100 is disclosed.

[0041] Please refer to Figure 1 , the hand expansion reel 100 is used for installation in the rotating part of the unwinding device 800, as a variable-diameter reel for the belt-shaped material.

[0042] Please refer to Figure 1 , Figure 2 , Figure 3 and Figure 4a , the hand expansion reel 100 includes a set of center shaft assembly 10, a set of sleeve assembly 40, a knob 20, a first end seat 30, a second end seat 50 and six sets of limiting bolt pairs 90.

[0043] Please refer to Figure 2 and Figure 6 , the center shaft assembly 10 includes a center shaft 11, a first conical part 12, a second conical part 12', an annular limiting part 13 and a cylindrical spring 14.

[0044] The center shaft 11 is cylindrical, and the end thereof corresponding to the first end seat 30 is referred to as the center shaft first end 1101, and the end thereof corresponding to the second end seat 50 is referred to as the center shaft second end 1102.

[0045] From the end of the center shaft first end 1101, the center shaft 11 is provided with external threads and has an arcuate cross section. The center shaft 11 has a section 112 with an arcuate cross section that is longer than a section 111 with external threads.

[0046] The side surface of the center shaft 11 is provided with an annular groove 113 and two pin holes 114.

[0047] The first conical member 12 and the second conical member 12' are fixed to the two pin holes 114 of the center shaft 11 in a one-to-one correspondence by means of pins or screws, and the tips of the two conical members are directed toward the center shaft first end 1101. The first conical member 12 is located in the middle of the center shaft 11, and the second conical member 12' is located close to the center shaft second end 1102.

[0048] The annular limiting member 13 is configured as a circlip and is fixed to the annular groove 113 of the center shaft 11 and is located between the first conical member 12 and the center shaft first end 1101.

[0049] The outer side of the center shaft 11 of the annular limiting member 13 is provided with external threads and has an arcuate cross section.

[0050] The cylindrical spring 14 is sleeved on the center shaft first end 1101 and abuts against the annular limiting member 13.

[0051] Please refer to Figure 1 , Figure 2 , Figure 4a , Figure 8a and Figure 8b , the first end seat 30 is a circular plate and is provided with a central through hole 321 and three bolt holes 31.

[0052] The three bolt holes 31 are used to engage three countersunk screws (not shown in the drawing) so as to be assembled integrally with the support cylinder 41 described below.

[0053] The central through hole 321 has an arcuate cross section so as to match the center shaft first end 1101. The first end seat 30 can be sleeved on the center shaft first end 1101 in an axially slidable and non-rotatable manner, and the inner side abuts against the cylindrical spring 14.

[0054] The center of the outer side of the first end seat 30 is provided with a bearing groove 32, and a turntable bearing 104 is fixedly embedded in the bearing groove 32. The turntable bearing 104 is integrally arranged with the first end seat 30 and can slide along the center shaft first end 1101. The turntable surface of the turntable bearing 104 is directed toward the knob 20.

[0055] That is, the rotary bearing 104 is axially movably sleeved on the central shaft 11 between the knob 20 and the first end seat 30.

[0056] Please refer to Figure 1 , Figure 4a and Figure 7 , the second end seat 50 is an integral alloy member, and its opposite ends are respectively configured as a sleeve connecting part 51 and a device connecting part 52.

[0057] The device connecting part 52 is a straight bar, and has an outer thread 521 at the middle part and a fixing groove 522 at the free end. The device connecting part 52 is used to be assembled to the winding and unwinding device 800 through the outer thread 521, and then to accept the rotating drive of the winding and unwinding device 800 through the fixing groove 522.

[0058] The sleeve connecting part 51 includes a plate-shaped main body. The plate-shaped main body is provided with an outer side boss 511 at the center of the outer side surface, and the end surface of the outer side boss 511 is integrally connected with the device connecting part 52. The plate-shaped main body is provided with an inner side boss 512 at the center of the inner side surface, and is also provided with three thread through holes 51a which are uniformly distributed in the circumferential direction.

[0059] The inner side boss 512 includes a bottom layer cylinder 5121 and a top layer cylinder 5122 which are concentrically arranged. The bottom layer cylinder 5121 is thicker than the top layer cylinder 5122.

[0060] The end surface of the inner side boss 512 is provided with an assembly blind hole 50a. The assembly blind hole 50a is axially slidably sleeved with the second end 1102 of the central shaft. That is, the second end 1102 of the central shaft is axially slidably sleeved in the assembly blind hole 50a of the second end seat 50.

[0061] The thread through holes 51a are engaged with countersunk screws. The ends of the countersunk screws protrude from the inner side surface of the plate-shaped main body, so as to assemble the support cylinder 41.

[0062] Please refer to Figure 2 , Figure 4a , Figure 4b and Figure 5 , the sleeve assembly 40 includes a support cylinder 41, three arc-shaped tiles 42, six wedge-shaped members 43, and two elastic rings (not shown in the drawing).

[0063] The outer wall (outer side surface) of the support cylinder 41 is provided with three positioning grooves 41a and three T-shaped through grooves 41c, and the inner wall is provided with three convex strips 411.

[0064] Each positioning groove 41a extends in the axial direction and is uniformly distributed in the circumferential direction, and the bottom surface is provided with two through holes 41d. Between any two adjacent positioning grooves 41a, a T-shaped through groove 41c is arranged.

[0065] Two through holes 41d are located in the middle of the positioning groove 41a and are spaced apart from each other in the axial direction. They are used to assemble a wedge-shaped piece 43, and their inner openings are located on the inner side of a protrusion 411.

[0066] Each protrusion 411 extends axially and is evenly distributed circumferentially, and corresponds to a positioning groove 41a in the center of the circumferential direction. Its radial inner side surface cooperates with the side surface of the bottom cylinder 5121 of the inner boss 512.

[0067] Each protrusion 411 has blind holes 41b on both ends of its axial direction to accommodate countersunk screws, which are then fixedly mounted on the inner surfaces of the first end seat 30 and the second end seat 50.

[0068] That is, the first end seat 30 and the second end seat 50 are respectively assembled into a whole with the support cylinder 41 by a number of countersunk screws; the support cylinder 41 is fixedly assembled with one end in the axial direction on the inner side of the first end seat 30 and with the other end in the axial direction on the inner side of the second end seat 50.

[0069] Please see Figure 3 Two sets of limiting bolt pairs 90 are installed within a T-shaped through slot 41c. The limiting bolt pairs 90 limit the material roll by contacting both sides of the roll with the screw 92. The nut 91 of the limiting bolt pair 90 can be slidably embedded into the wider bottom of the T-shaped through slot 41c. The screw 92 of the limiting bolt pair 90 is mainly used to lock into the narrower opening of the T-shaped through slot 41c for fixed position. One end of the screw 92 engages the nut 91, is thinner than the rest, and transitions to the rest through an annular right-angle step, which can be positioned against the edge of the T-shaped through slot 41c by the annular step.

[0070] Each arc-shaped tile 42 corresponds to and is fitted with a positioning groove 41a, which in turn corresponds to a protrusion 411. Thus, the three arc-shaped tiles 42 move evenly around the outside of the supporting cylinder 42.

[0071] Please note that each arc-shaped tile 42 is axially shorter than the supporting cylinder 41, does not abut against the axial inner surface of the first end seat 30 and the second end seat 50, and does not extend beyond the circumferential outer surface of the first end seat 30 and the second end seat 50. This structure reduces the resistance during diameter changes and ensures stable assembly of the arc-shaped tile 42.

[0072] Each arc-shaped tile 42 has a centrally located, axially extending trapezoidal groove 42a on its inner wall, on which two wedge-shaped pieces 43 are installed. One of these wedge-shaped pieces 43 engages with the first conical piece 12, and the other engages with the second conical piece 12'.

[0073] Each wedge 43 comprises an outer end 432 and an inner end 431. The outer end 432 is connected to the inner wall of the arc-shaped tile 42, and its end face edge protrudes into the trapezoidal through slot 42a of the arc-shaped tile 42. The inner end 431 can radially slide through the supporting cylinder 42, and is provided with a slope 4311 to match the conical surface of the two conical members 12, 12'.

[0074] Specifically, the inner end 431 of each wedge 43 penetrates a through hole 41d in the radial direction and passes through the corresponding convex strip 411.

[0075] The inner end 431 described above is partially concave towards the side surface of the first end 1101 of the central shaft, forming a hook 43a. Three hooks 43a around one conical member are hung with an elastic ring (not shown in the figure) described above, so that all arc-shaped tiles 42 can be elastically restored into the positioning groove 41a of the supporting cylinder 41.

[0076] With the above structure, two elastic rings of the sleeve assembly 40 are sleeved on the hooks 43a of the three wedges 43 corresponding to the first conical member 12 and the second conical member 12' respectively. The two elastic rings are located inside the supporting cylinder 41, and the deformation space range is small and not easy to fatigue, and is not affected by external interference.

[0077] Each arc-shaped tile 42 is connected to two wedges 43, and the two wedges are one wedge with the inner end 431 of the wedge matching the conical surface of the first conical member 12, and the other wedge with the inner end 431 of the wedge matching the conical surface of the second conical member 12'.

[0078] Please refer to Figure 1 , Figure 2 , Figure 4a , Figure 9a and Figure 9b , the knob 20 is engaged with the first end 1101 of the central shaft through the central threaded through hole 20a, and the inner central column 21 abuts against the first end seat 30.

[0079] The end of the first end 1101 of the central shaft is sleeved with an annular limiting member 105 to prevent the knob 20 from being pulled out of the central shaft 11.

[0080] Specifically, the knob 20 is an integrally formed member, comprising a barrel-shaped body, a central column 21 and a pair of connecting plates 22. The central column 21 is located at the center of the barrel bottom of the barrel-shaped body, and is provided with a central threaded through hole 20a. The end face protrudes from the barrel mouth of the barrel-shaped body and abuts against the disc surface of the disc bearing 104. The two connecting plates 21 are located in the same radial direction and are connected between the central column 21 and the inner wall of the barrel-shaped body.

[0081] Specifically, the center of the barrel-shaped body is concave to form a groove 21a. The groove 21a makes the center column 21 also barrel-shaped.

[0082] The expanding process of the hand expanding reel 100 includes:

[0083] When the operator manually rotates the lower knob 20 around the center shaft 11, the center shaft 11 is driven by the knob 20 to protrude outward of the knob 20, the cylindrical spring 14 is compressed, the six wedge-shaped pieces 43 move axially on the two conical pieces 12, 12' and radially away from the center shaft 11, and the three arc-shaped tiles 42 float up, so that the outer diameter of the reel becomes larger.

[0084] When the operator manually rotates the lower knob 20 around the center shaft 11, the center shaft 11 is driven by the knob 20 and the cylindrical spring 14 to retract inward of the knob 20, the center shaft assembly 10 moves toward the winding and unwinding device 800, the six wedge-shaped pieces 43 move axially on the two conical pieces 12, 12' and radially approach the center shaft, and the three arc-shaped tiles 42 fall down, so that the outer diameter of the reel becomes smaller.

[0085] When the wedge-shaped pieces 43 do not leave the conical pieces 12, 12' but leave the conical surfaces of the two conical pieces, the outer diameter of the reel reaches the minimum or maximum value. When the outer diameter of the reel is the smallest, the three arc-shaped tiles 42 fall into the three positioning grooves 41a of the supporting cylinder 41.

[0086] The hand expanding reel 100 has the following technical advantages.

[0087] 1) Convenient to use

[0088] Only the lower knob 20 needs to be operated, and the operation can be performed by one hand.

[0089] 2) Safe and reliable

[0090] The compression degree of the cylindrical spring 14 is limited, and after the outer diameter of the reel reaches the maximum value, resistance is provided to prevent the continuous rotation of the knob, so as to prevent the wedge-shaped pieces 43 from leaving the thicker ends of the conical pieces 12, 12' and the second end 1102 of the center shaft from leaving the second end seat 50; the annular limiting piece 105 at the end of the first end 1101 of the center shaft can limit the position of the knob 20, so as to prevent the wedge-shaped pieces 43 from leaving the pointed ends of the conical pieces 12, 12'.

[0091] 3) Compact structure

[0092] The two elastic sleeves of the sleeve assembly 40 are located inside the supporting cylinder 41 and are not disturbed by the outside, so the deformation range is small and fatigue is not easy to occur.

[0093] In another embodiment, the outer side boss 511 can include two prismatic bodies for clamping by two wrenches, so as to facilitate the disassembly and assembly of the hand expanding reel 100.

[0094] In another embodiment, the plate-shaped body of the second end seat 50 is provided with a clamping slot or buckle at the circumferential edge for clamping a dismounting tool, thereby facilitating the dismounting of the hand expanding reel 100.

[0095] In other approximate embodiments, the number of wedge-shaped pieces is double the number of arc-shaped tiles. If the number of conical pieces is three, then the number of wedge-shaped pieces should be three times the number of arc-shaped tiles.

[0096] In another embodiment, a through hole is provided between the two ends of the convex strip 411 of the supporting cylinder 41. The end of the through hole is provided with an internal thread, which is equivalent to the end face blind hole 41b of the first embodiment.

[0097] In another embodiment, the supporting cylinder 41 and the two end seats can be assembled into one body by buckling.

[0098] Embodiment two

[0099] A winding and unwinding device 800 is disclosed.

[0100] The winding and unwinding device 800 is used for winding and unwinding a strip-shaped material. The winding and unwinding device 800 comprises a driving part and a rotating part. The rotating part is installed with the hand expanding reel 100 of the first embodiment. The driving part is used to drive the hand expanding reel 100 to rotate around the central shaft 11 through the rotating part.

[0101] All the above embodiments, application examples and technical analysis are intended to introduce the technical concept and characteristics of the present utility model, so that the personnel in the field can implement the technical scheme of the present utility model, and do not constitute any limitation on the protection scope of the present utility model. Simple modifications and equivalent transformations of the above embodiments are within the protection scope of the present utility model.

Claims

1. A hand expansion reel for the take-up and pay-off of a web material, characterized in that The hand expansion reel comprises a central shaft assembly, a first end seat, a knob, a second end seat and a sleeve assembly. The central shaft assembly comprises a central shaft, a first cone, a second cone, an annular limiting member and a cylindrical spring. The first cone and the second cone are fixedly sleeved on the central shaft with the pointed ends facing the first end of the central shaft. The first cone is located in the middle of the central shaft. The annular limiting member is fixedly sleeved on the central shaft between the first cone and the first end of the central shaft. The outer side of the central shaft is provided with external threads and the radial section of the central shaft is in the shape of an arc. The cylindrical spring is sleeved on the first end of the central shaft and abuts against the annular limiting member. The first end seat is in the shape of a plate and is provided with a central through hole. The first end seat is axially slidably sleeved on the first end of the central shaft and cannot rotate circumferentially. The inner side of the first end seat abuts against the cylindrical spring. The knob is engaged on the first end of the central shaft through a central threaded through hole and abuts against the first end seat from the inner side. The second end seat is provided with an end seat blind hole in the center of the inner side of the plate-shaped main body. The end seat blind hole axially slidably sleeves the remaining end of the central shaft. The sleeve assembly comprises a supporting cylinder, at least two arc-shaped tiles and a plurality of wedge-shaped members. All the arc-shaped tiles are circumferentially uniformly and movably covered on the outer side of the supporting cylinder. Each wedge-shaped member radially slidably penetrates the supporting cylinder and is connected to the inner wall of the arc-shaped tile from the outer side. Each arc-shaped tile is connected to two wedge-shaped members. One of the two wedge-shaped members is matched with the tapered surface of the first cone from the inner side of the wedge-shaped member. The other wedge-shaped member is matched with the tapered surface of the second cone from the inner side of the wedge-shaped member. The supporting cylinder is fixedly assembled on the inner side of the first end seat from the axial one end. The supporting cylinder is fixedly assembled on the inner side of the second end seat from the axial other end.

2. The hand expansion reel according to claim 1, wherein the first end seat and the second end seat are assembled as a whole with the supporting cylinder through a plurality of countersunk screws.

3. The hand expansion reel according to claim 1, wherein the side of the wedge-shaped member facing the first end of the central shaft is partially concave to form a hook. The sleeve assembly further comprises two elastic rings. One elastic ring is sleeved on the hook of the wedge-shaped member corresponding to the first cone. The other elastic ring is sleeved on the hook of the wedge-shaped member corresponding to the second cone.

4. The hand expansion reel according to claim 1, wherein the outer wall of the supporting cylinder is provided with a plurality of positioning grooves and the inner wall is provided with a plurality of axially extending protrusions. The arc-shaped tile is matched with the positioning groove in a one-to-one clearance manner and corresponds to at least one protrusion. The inner side of the wedge-shaped member penetrates the corresponding protrusion along the radial direction. Each arc-shaped tile does not abut against the axial inner side of the first end seat and the second end seat and does not exceed the radial outer side of the first end seat and the second end seat.

5. The hand expansion reel according to claim 4, wherein the hand expansion reel further comprises a plurality of limiting bolt pairs. The supporting cylinder is provided with a T-shaped through groove between the adjacent two positioning grooves. Two limiting bolt pairs are installed in each T-shaped through groove. The nut of each limiting bolt pair is slidably embedded in the wider groove bottom of the T-shaped through groove. Each set of limit bolt pair of screw rod, one end meshing nut, the main body is used for clamping in the T-shaped slot of the narrow slot outside and position fixed.

6. The hand expansion reel of claim 1, wherein, The inner wall of the arc-shaped tile is provided with an axially extending trapezoidal slot; The outer side end of the wedge-shaped part is protruded and used for clamping into the trapezoidal slot.

7. The hand expansion reel of claim 1, wherein Further comprising: A rotary disc bearing is axially movably sleeved on the central shaft between the knob and the first end seat, and the rotary disc surface faces the knob.

8. The hand expansion reel of claim 7, wherein, The rotary disc bearing is fixedly embedded in the center of the end face of the first end seat, and the knob comprises a barrel-shaped body and a central column; The central column is located in the center of the barrel bottom of the barrel-shaped body, is provided with the central threaded through hole, and the end face protrudes the barrel mouth of the barrel-shaped body and abuts against the rotary disc surface of the rotary disc bearing.

9. A winding and unwinding device for winding and unwinding a web material, comprising a rotating part, characterized in that The rotating part is installed with the hand expansion reel of any one of claims 1 to 8.

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