Material roll fixing device and material roll assembly

Abstract

The utility model provides a material roll fixing device and a material roll assembly, and belongs to the technical field of roller presses, the material roll fixing device comprises a rotating shaft and a snap ring, the fixed end of the rotating shaft is rotatably connected to a frame body of the roller press by means of a bearing assembly, the working end of the rotating shaft is provided with a clamping structure, and the clamping structure is matched with the end part of a reel in a clamping manner. The working end of the rotating shaft is provided with a limiting protrusion protruding out of the circumferential direction of the rotating shaft. The clamping ring is arranged on the outer side of the rotating shaft in a sleeving mode, the clamping ring moves in the axial direction to cover or expose the connecting position of the clamping structure and the reel, and a limiting groove matched with the limiting protrusion is formed in the inner side wall of the clamping ring. According to the material roll fixing device, when the material roll fixing device is replaced, the reel can be separated from the clamping structure only by reversely moving the clamping ring in the axial direction till the connecting position of the reel is exposed, and the material roll can be replaced; the material roll fixing device is simple in structure, the fixing operation steps are simplified, and replacement is convenient.

Description

Technical Field

[0001] The utility model belongs to the technical field of roll presses, and more specifically, relates to a coil fixing device and a coil assembly. Background Art

[0002] At present, the roll press coil assembly mainly uses non-woven fabric to wipe off the residual stains on the roll surface. At present, the technology for fixing the non-woven fabric coil assembly is a chuck device with a trapezoidal lead screw as the main body, and the coil assembly is fixed by shaking the handwheels at both ends. This chuck device has cumbersome fixing operations, inconvenient replacement of the coil assembly, and large space occupation. In the case of limited installation space, it will be difficult to use. Summary of the Utility Model

[0003] The purpose of the utility model is to provide a coil fixing device and a coil assembly, aiming to solve the problems of cumbersome fixing operation and inconvenient replacement of the coil assembly.

[0004] To achieve the above object, the technical solution adopted by the utility model is: to provide a coil fixing device including a rotating shaft and a clamping ring. The fixed end of the rotating shaft is rotatably connected to the frame of the roll press by means of a bearing assembly. The working end of the rotating shaft has a clamping structure, and the clamping structure is clamped and matched with the end of the reel. The working end of the rotating shaft has a limiting protrusion protruding from the circumference of the rotating shaft; the clamping ring is sleeved outside the rotating shaft, and the clamping ring moves axially to cover or expose the connection between the clamping structure and the reel, and a limiting groove adapted to the limiting protrusion is provided on the inner side wall of the clamping ring.

[0005] As another embodiment of the present application, the clamping structure is a convex rib protruding from the end face of the rotating shaft, and the convex rib is distributed along the radial direction of the rotating shaft.

[0006] As another embodiment of the present application, the limiting protrusion is an arc-shaped plate distributed along the circumference of the rotating shaft. The arc-shaped plate is an arc-shaped plate with a central angle less than or equal to 180°. The center line of the arc-shaped plate coincides with the convex rib; several arc-shaped thickening parts are provided on the inner side of the clamping ring, and the thickening parts protrude outward, and a limiting groove is formed between the side walls of two adjacent thickening parts.

[0007] As another embodiment of the present application, the rotating shaft includes a shaft body and a rotating seat; the rotating seat is located at the working end of the shaft body, the outer diameter of the rotating seat is larger than the outer diameter of the shaft body, the convex rib is provided at the working end of the rotating seat, and the arc-shaped plate is annularly arranged on the outer side wall of the rotating seat.

[0008] As another embodiment of the present application, the snap ring includes a clamping portion and a collar. The clamping portion is sleeved outside the shaft body, and the inner diameter of the clamping portion is smaller than the outer diameter of the rotating base. The collar is located at the working end of the clamping portion, the inner diameter of the collar is consistent with the outer diameter of the rotating base, and the limiting groove is located inside the collar. The clamping portion abuts against the back side of the rotating base to limit the collar.

[0009] As another embodiment of the present application, the inner diameter of the clamping portion is smaller than the inner diameter of the thickened portion.

[0010] As another embodiment of the present application, an elastic member is provided between the snap ring and the bearing assembly, and the elastic member is always in a compressed state.

[0011] As another embodiment of the present application, the bearing assembly includes a bearing inner gland, an inner fixing seat, a fixed side plate, an outer fixing seat, and a bearing outer gland that are sequentially sleeved on the fixed end of the rotating shaft. Bearings are provided inside both the inner fixing seat and the outer fixing seat, and the bearings are rotatably connected to the rotating shaft by means of the bearings. The two ends of the elastic member are respectively connected to the bearing inner gland and the snap ring.

[0012] As another embodiment of the present application, the snap ring is pin-connected and fixed to the rotating shaft.

[0013] The beneficial effects of the coil fixing device provided by the present utility model are as follows: Compared with the prior art, the coil fixing device of the present utility model uses the clamping structure at the working end of the rotating shaft to be clamped with the end of the reel, and the rotating shaft drives the reel to rotate synchronously. The snap ring is clamped and cooperated with the rotating shaft by using the limiting groove inside it and extends forward to the connection part of the reel. The snap ring wraps around the outside of the reel to prevent the reel from coming out during rotation. When replacing, only need to move the snap ring axially in the reverse direction to expose the connection part of the reel, then the reel can be taken out from the clamping structure for coil replacement. The above-mentioned coil fixing device has a simple structure, simplifies the fixing operation steps, and is convenient for replacement.

[0014] A coil assembly is further provided, which adopts the above-mentioned coil fixing device, and further includes a reel, and the end of the reel has a clamping groove or a clamping protrusion adapted to the clamping structure.

[0015] The beneficial effects of the coil assembly provided by the present utility model are as follows: Compared with the prior art, for the coil assembly of the present utility model, both ends of the reel are fixed by the coil fixing device. The reel and the rotating shaft are clamped and cooperated, and are limited to the working end of the rotating shaft by the snap ring and rotate synchronously with the rotating shaft, realizing the installation and fixing of the coil. The problem of difficult coil replacement is solved by moving the snap ring, and the problems of large space occupation and cumbersome fixing operation of the existing coil assembly are solved. The operation steps are simplified, the replacement is convenient, and the installation space is reduced at the same time. Brief Description of the Drawings

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0017] Figure 1 It is a schematic structural diagram of the coil assembly in the embodiment of the present invention;

[0018] Figure 2 It is a schematic structural diagram of the coil fixing device provided by the embodiment of the present invention;

[0019] Figure 3 It is a schematic structural diagram of the rotating shaft provided by the embodiment of the present invention;

[0020] Figure 4 It is a schematic structural diagram of the snap ring provided by the embodiment of the present invention;

[0021] Figure 5 It is a schematic structural diagram of the reel provided by the embodiment of the present invention.

[0022] In the figure: 1. Reel; 2. Snap ring; 3. Elastic member; 4. Fixed side plate; 5. Outer fixed seat; 6. Bearing outer gland; 7. Rotating shaft; 8. Inner fixed seat; 9. Bearing inner gland; 10. Raised rib; 11. Arc plate; 12. Shaft body; 13. Clamping portion; 14. Sleeve ring; 15. Clamping groove. Detailed Embodiments

[0023] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the following further details the present invention in conjunction with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0024] Please refer to Figures 1 to 5 , and now the coil fixing device and the coil assembly provided by the present invention will be described. The coil fixing device includes a rotating shaft 7 and a snap ring 2. The fixed end of the rotating shaft 7 is rotationally connected to the frame of the rolling press by means of a bearing assembly. The working end of the rotating shaft 7 has a clamping structure, and the clamping structure is in clamping cooperation with the end of the reel 1. The working end of the rotating shaft 7 has a limiting protrusion protruding from the circumference of the rotating shaft 7; the snap ring 2 is sleeved outside the rotating shaft 7, and the snap ring 2 moves axially to cover or expose the connection between the clamping structure and the reel 1, and a limiting groove adapted to the limiting protrusion is provided on the inner side wall of the snap ring 2.

[0025] Compared with the prior art, the coil fixing device provided by the utility model uses the clamping structure at the working end of the rotating shaft 7 to be clamped with the end of the reel 1, and the rotating shaft 7 drives the reel 1 to rotate synchronously. The snap ring 2 is clamped and cooperated with the rotating shaft 7 by using the limiting groove on its inner side and extends forward to the connection part of the reel 1. The snap ring 2 is wrapped outside the reel 1 to prevent the reel 1 from coming out during rotation. When replacing, only need to move the snap ring 2 axially in the reverse direction to expose the connection part of the reel 1, then the reel 1 can be removed from the clamping structure for coil replacement. The above-mentioned coil fixing device has a simple structure, simplifies the fixing operation steps and is convenient to replace.

[0026] As Figure 1 shown, the outer diameter of the reel 1 is the same as the outer diameter of the rotating shaft 7 and is also the same as the inner diameter of the snap ring 2 at the same time. When the snap ring 2 is pushed forward along the axis of the rotating shaft 7 and the snap ring 2 is sleeved outside the connection part of the reel 1 and the rotating shaft 7 in real time, a part of the snap ring 2 fits on the outer wall of the rotating shaft 7, and the other part of the snap ring 2 fits on the outer wall of the reel 1. Only need to fix the snap ring 2 on the rotating shaft 7 to prevent the snap ring 2 from moving axially in the reverse direction, then the reel 1 can be limited by the snap ring 2 to prevent the reel 1 from coming out of the end of the rotating shaft 7.

[0027] When the reel 1 needs to be replaced, only need to move the snap ring 2 in the reverse direction, move the snap ring 2 away from the connection part of the reel 1 and the rotating shaft 7, expose the connection part, and then move the reel 1 out of the rotating shaft 7 along the direction of the clamping structure.

[0028] As Figure 3 and Figure 5 shown, the clamping structure is the raised edge 10 protruding from the end face of the rotating shaft 7, and the raised edge 10 is distributed along the radial direction of the rotating shaft 7. Correspondingly, a connection groove is formed on the end face of the reel 1, and the connection groove is adapted to the raised edge 10.

[0029] The raised edge 10 is one or more. When the raised edge 10 is one, the length of the raised edge 10 is equal to the diameter of the end face of the rotating shaft 7, and both ends of the raised edge 10 are clamped with two symmetrically arranged connection grooves on the end face of the reel 1. When the rotating shaft 7 rotates, both ends of the raised edge 10 apply force to the two connection grooves of the reel 1 at the same time, making the force evenly distributed. When the raised edge 10 is multiple, multiple raised edges 10 are evenly distributed radially with the center of the end face of the rotating shaft 7 as the center of the circle, and multiple raised edges 10 are clamped with multiple connection grooves on the end face of the reel 1 in one-to-one correspondence. When the rotating shaft 7 rotates, multiple raised edges 10 apply force to the reel 1 at the same time, ensuring that the force on the reel 1 is evenly distributed during rotation. When the raised edge 10 is multiple, the length of each raised edge 10 is not less than the thickness of the reel 1 and not greater than the radius of the end face of the rotating shaft 7 at the same time.

[0030] However, when multiple protruding ridges 10 are provided on the rotating shaft 7, the clamping fit between the rotating shaft 7 and the reel 1 can only be achieved by horizontal translation in the horizontal direction, which is inconvenient for the installation and replacement of the reel 1. Therefore, a method of providing a single protruding ridge 10 at the working end of the rotating shaft 7 is mostly adopted to limit the reel 1. When only one protruding ridge 10 is provided at the working end of the rotating shaft 7, the length of one protruding ridge 10 is equal to the diameter of the end face where it is located. Correspondingly, a connecting groove is provided at the end of the reel 1, and the connecting groove is radially consistent with the end face of the reel 1. When the reel 1 is a hollow shaft, two connecting groove bodies are formed on the end face of the reel 1, and the two connecting groove bodies cooperate with the two end parts of the protruding ridge 10; when the reel 1 is a solid shaft, the connecting groove provided on the end face of the reel 1 is a through groove, which passes through the center of the end face of the reel 1 and is arranged radially, and the connecting groove is clamped and fitted with the protruding ridge 10.

[0031] As Figures 2 to 4 shown, the inner clamping fit between the rotating shaft 7 and the snap ring 2. The limiting protrusions protruding outward in the circumferential direction at the working end of the above-mentioned rotating shaft 7 can be one or more, and grooves are formed between the side walls of adjacent limiting protrusions, and the grooves are correspondingly clamped and fitted with the outwardly protruding parts outside the limiting grooves on the inner side wall of the snap ring 2. The rotating shaft 7 and the snap ring 2 are clamped and fitted by staggered engagement on the contact surface, so as to ensure the synchronous rotation of the snap ring 2 and the rotating shaft 7, and prevent the reel 1 from slipping out during rotation.

[0032] As Figure 3 shown, the limiting protrusion is an arc-shaped plate 11 distributed along the circumference of the rotating shaft 7. The arc-shaped plate 11 is an arc-shaped plate 11 with a central angle less than or equal to 180°, and the center line of the arc-shaped plate 11 coincides with the protruding ridge 10; several arc-shaped thickening parts are provided on the inner side of the snap ring 2, and the thickening parts protrude outward, and limiting grooves are formed between the side walls of two adjacent thickening parts.

[0033] The arc-shaped plate 11 is arranged to fit the outer circumference of the working end of the rotating shaft 7. The tail end of the arc-shaped plate 11 is connected to the rotating shaft 7, and its front end extends in front of the working end of the rotating shaft 7. The length of the arc-shaped plate 11 protruding from the end face of the rotating shaft 7 in the axial direction is greater than the protruding height of the protruding ridge 10. The arc-shaped plate 11 can support the reel 1 while forming a clamping fit with the snap ring 2.

[0034] The middle part of the arc-shaped plate 11 is connected to one end of the convex rib 10. When the reel 1 is installed at the end of the rotating shaft 7 by means of the connection groove and the convex rib 10, the lower end of the reel 1 fits on the inner side wall of the arc-shaped plate 11, and the reel 1 is supported by the arc-shaped plate 11. After the end of the reel 1 is supported and positioned by the arc-shaped plate 11, then the snap ring 2 is moved forward, and the snap ring 2 is sleeved at the connection part of the rotating shaft 7 and the reel 1. While the limiting groove of the snap ring 2 is clamped and matched with the arc-shaped plate 11 of the rotating shaft 7, the other side of the reel 1 is limited to prevent it from coming out from the side away from the arc-shaped plate 11. Only when the central angle of the arc-shaped plate 11 is limited to not more than 180°, the notch corresponding to the arc-shaped plate 11 can allow the reel 1 to pass through smoothly.

[0035] One or more thickened parts are arranged on the inner side of the snap ring 2. When there is one thickened part arranged on the inner side of the snap ring 2, the thickened part is arc-shaped, and the two end faces of the thickened part extending along the circumferential direction of the snap ring 2 form the inner side walls of the two sides of the limiting groove. The two end faces of the thickened part are respectively attached to the two end faces of the arc-shaped plate 11, and the thickness of the thickened part is the same as the thickness of the arc-shaped plate 11. When the snap ring 2 is moved forward to the outside of the reel 1, the inner side wall of the thickened part fits on the outer side wall of the reel 1. When there are multiple thickened parts arranged on the inner side of the snap ring 2, the gap between any two thickened parts forms the limiting groove.

[0036] As Figure 3 As shown in the figure, the rotating shaft 7 includes a shaft body 12 and a rotating seat; the rotating seat is located at the working end of the shaft body 12, the outer diameter of the rotating seat is larger than the outer diameter of the shaft body 12, the convex rib 10 is arranged at the working end of the rotating seat, and the arc-shaped plate 11 is arranged around the outer side wall of the rotating seat. One end of the shaft body 12 of the rotating shaft 7 is rotatably connected to the bearing assembly, and the other end of the rotating shaft 7 is connected to the rotating seat. The outer diameter of the rotating seat is larger than the outer diameter of the shaft body 12, and a limiting step is formed on the connection surface between the rotating seat and the shaft body 12, and this limiting step is used to connect the snap ring 2 to prevent the snap ring 2 from moving forward too much and coming out of the rotating seat. The outer diameter of the rotating seat is the same as the outer diameter of the reel 1, the arc-shaped plate 11 is located outside the rotating seat, and the inner side wall of the arc-shaped plate 11 fits on the outer side wall of the rotating seat. After the reel 1 is installed, the arc-shaped plate 11 fits on the bottom end of the reel 1 to support the reel 1.

[0037] As Figure 4 As shown in the figure, the snap ring 2 includes a clamping part 13 and a collar 14. The clamping part 13 is sleeved outside the shaft body 12, and the inner diameter of the clamping part 13 is smaller than the outer diameter of the rotating seat; the collar 14 is located at the working end of the clamping part 13, the inner diameter of the collar 14 is the same as the outer diameter of the rotating seat, and the limiting groove is located inside the collar 14; the clamping part 13 abuts against the back side of the rotating seat to limit the collar 14.

[0038] The collar 14 is located in the positive direction of the clamping portion 13 and is fixedly connected to the clamping portion 13, or the collar 14 and the clamping portion 13 are integrally formed. Both the clamping portion 13 and the collar 14 are annular structures. The inner diameter of the opening in the middle of the clamping portion 13 is the same as the outer diameter of the shaft body 12 of the rotating shaft 7, and the clamping portion 13 and the shaft body 12 of the rotating shaft 7 are in sliding fit. The inner side wall of the collar 14 is adapted to the outer side wall of the rotating base. The end face of the clamping portion 13 abuts against the limiting step of the rotating base, which can limit the forward movement of the clamping portion 13 to achieve the positioning effect.

[0039] Optionally, the inner diameter of the clamping portion 13 is smaller than the inner diameter of the thickening portion.

[0040] To fix and limit the snap ring 2 and prevent the snap ring 2 from moving during rotation, an elastic member 3 can be provided between the snap ring 2 and the bearing assembly, and the elastic member 3 is always in a compressed state.

[0041] The bearing assembly includes a bearing inner gland 9, an inner fixing seat 8, a fixed side plate 4, an outer fixing seat 5, and a bearing outer gland 6 that are sequentially sleeved on the fixed end of the rotating shaft 7. Bearings are provided on the inner sides of the inner fixing seat 8 and the outer fixing seat 5, and the rotating shaft 7 is rotatably connected by means of the bearings; both ends of the elastic member 3 are respectively connected to the bearing inner gland 9 and the snap ring 2.

[0042] The bearing assembly is sequentially connected to the fixed end of the rotating shaft 7, where the inner fixing seat 8 and the outer fixing seat 5 are arranged at intervals, and bearings are provided on the inner sides of the inner fixing seat 8 and the outer fixing seat 5, and the bearings are sleeved on the rotating shaft 7. A fixed side plate 4 is fixed between the inner fixing seat 8 and the outer fixing seat 5 by bolts, and the fixed side plate 4 is used to connect the frame structure of the roll press. A bearing inner gland 9 and a bearing outer gland 6 are respectively arranged on both sides of the bearings on both sides. The elastic member 3 is sleeved on the outside of the rotating shaft 7 and is located between the bearing inner gland 9 and the snap ring 2. Specifically, one end of the elastic member 3 is connected to the end face of the bearing inner gland 9 away from the inner fixing seat 8, and the other end of the elastic member 3 is connected to the end face of the clamping portion 13 away from the collar 14.

[0043] The elastic member 3 can be a spring, and the spring is always in a compressed state. Without the action of external force, the self-elastic force of the spring will drive the snap ring 2 to move towards the side away from the bearing assembly until the snap ring 2 abuts against the limiting step of the rotating base. When it is necessary to replace the coil, only an external force needs to be applied to drive the snap ring 2 to move in the reverse direction.

[0044] Alternatively, the snap ring 2 is pin-connected and fixed to the rotating shaft 7. Through holes extending radially are formed in both the snap ring 2 and the rotating shaft 7, and the fixing pin sequentially passes through the through holes to fix the snap ring 2 on the rotating shaft 7. When the coil needs to be replaced, the fixing pin is removed, and then the snap ring 2 is moved reversely to disengage from the rotating seat of the rotating shaft 7. When the coil needs to be installed, when the coil is snap-connected and placed on the arc-shaped plate 11, the snap ring 2 is manually moved forward to cover the connection between the coil and the rotating shaft 7, and the through holes in the snap ring 2 and the through holes on the rotating shaft 7 are correspondingly communicated. Finally, the snap ring 2 is fixed to the rotating shaft 7 by means of the fixing pin.

[0045] As Figures 1 to 5 shown, a coil assembly is further provided. The coil assembly includes the above-mentioned coil fixing device, and further includes a reel 1. The end of the reel 1 has a clamping groove 15 or a clamping protrusion adapted to the clamping structure on the rotating shaft 7.

[0046] When the clamping structure on the rotating shaft 7 is the protruding rib 10, the end of the reel 1 is provided with a clamping groove 15. When the clamping structure on the rotating shaft 7 is a groove, the end of the reel 1 is provided with a clamping protrusion.

[0047] In the coil assembly provided by the present utility model, compared with the prior art, both ends of the reel 1 are fixed by the coil fixing device. The reel 1 and the rotating shaft 7 are clamped and cooperate, and are limited to the working end of the rotating shaft 7 by means of the snap ring 2 and rotate synchronously with the rotating shaft 7, realizing the installation and fixation of the coil; the problem of difficult coil replacement is solved by the movement of the snap ring 2, and the problems of large occupied space and cumbersome fixing operation of the existing coil assembly are solved, simplifying the operation steps, facilitating replacement, and reducing the installation space at the same time.

[0048] The above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present utility model shall be included in the protection scope of the present utility model.

Claims

1. Coil fixing device, characterized in that, It includes a rotating shaft (7) and a snap ring (2). The fixed end of the rotating shaft (7) is rotatably connected to the frame of the roll press by means of a bearing assembly. The working end of the rotating shaft (7) has a clamping structure, and the clamping structure is in clamping cooperation with the end of the reel (1). The working end of the rotating shaft (7) has a limiting projection protruding from the circumference of the rotating shaft (7); the snap ring (2) is sleeved outside the rotating shaft (7), and the snap ring (2) moves axially to cover or expose the connection between the clamping structure and the reel (1), and a limiting groove adapted to the limiting projection is provided on the inner side wall of the snap ring (2).

2. The coil fixing device according to claim 1, characterized in that, The clamping structure is a convex rib (10) protruding from the end face of the rotating shaft (7), and the convex rib (10) is distributed along the radial direction of the rotating shaft (7).

3. The coil fixing device according to claim 2, characterized in that, The limiting projection is an arc-shaped plate (11) distributed along the circumference of the rotating shaft (7). The arc-shaped plate (11) is an arc-shaped plate (11) with a central angle less than or equal to 180°. The midline of the arc-shaped plate (11) coincides with the convex rib (10); several arc-shaped thickening parts are provided on the inner side of the snap ring (2), and the thickening parts protrude outward, and the limiting groove is formed between the side walls of two adjacent thickening parts.

4. The coil fixing device according to claim 3, wherein, The rotating shaft (7) includes a shaft body (12) and a rotating seat; the rotating seat is located at the working end of the shaft body (12), the outer diameter of the rotating seat is larger than the outer diameter of the shaft body (12), the convex rib (10) is provided at the working end of the rotating seat, and the arc-shaped plate (11) is annularly arranged on the outer side wall of the rotating seat.

5. The coil fixing device according to claim 4, wherein, The snap ring (2) includes a clamping part (13) and a collar (14). The clamping part (13) is sleeved outside the shaft body (12), and the inner diameter of the clamping part (13) is smaller than the outer diameter of the rotating seat; the collar (14) is located at the working end of the clamping part (13), the inner diameter of the collar (14) is the same as the outer diameter of the rotating seat, and the limiting groove is located inside the collar (14); the clamping part (13) abuts against the back side of the rotating seat to limit the collar (14).

6. The coil fixing device according to claim 5, characterized in that, The inner diameter of the clamping part (13) is smaller than the inner diameter of the thickening part.

7. The coil fixing device according to claim 1, wherein, An elastic member (3) is provided between the snap ring (2) and the bearing assembly, and the elastic member (3) is always in a compressed state.

8. The coil fixing device according to claim 7, wherein The bearing assembly includes a bearing inner gland (9), an inner fixing seat (8), a fixed side plate (4), an outer fixing seat (5) and a bearing outer gland (6) which are sequentially sleeved on the fixed end of the rotating shaft (7). Bearings are provided on the inner sides of the inner fixing seat (8) and the outer fixing seat (5), and the rotating shaft (7) is rotatably connected by means of the bearings; the two ends of the elastic member (3) are respectively connected to the bearing inner gland (9) and the snap ring (2).

9. The coil fixing device according to claim 1, characterized in that, The snap ring (2) is fixedly connected to the rotating shaft (7) by pinning.

10. The material roll assembly is characterized in that, Adopting the reel fixing device as described in claim 1, it further includes a reel (1), and the end of the reel (1) has a clamping groove (15) or a clamping projection adapted to the clamping structure.

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