Rewinding rack and 3D printer applying same

Abstract

The utility model relates to the technical field, in particular to a rewinding rack and a 3D printer applying the rewinding rack. The rewinding material frame comprises at least one rewinding material disc support, the rewinding material disc support comprises a fixing shaft, the front end of the fixing shaft is fixedly connected to the machine frame in a suspended mode, and the rear end of the fixing shaft is arranged in an extending mode in the direction away from the machine frame. The charging tray shaft is arranged on the periphery of the fixed shaft in a sleeving and clearance mode and can rotate around the periphery of the fixed shaft in the circumferential direction; the clutch piece is in contact with the fixed shaft and is fixedly arranged on the fixed shaft in a pressing manner through an elastic pressing assembly; the rewinding force storage module comprises a first elastic piece, one end of the first elastic piece is fixedly connected with the clutch piece, and the other end of the first elastic piece is fixedly connected with the tray shaft; and a limiting mechanism is arranged between the clutch piece and the charging tray shaft. The technical problem that silk materials of an existing 3D printer easily become fluffy and intertwine with one another is solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field, and particularly relates to a back-winding material rack and a 3D printer applying the same. BACKGROUND

[0002] In the 3D printing process, a traditional material rack generally comprises a cylinder fixed on a main machine, a filament disc is sleeved on the outer periphery of the cylinder, and a 3D printing filament is wound on the filament disc. The filament is sent into the 3D printer during printing, and the material rack only serves to hang the filament disc. However, in this way, when the material is returned or the filament is full, the filament cannot be tightly wound on the filament disc, the filament is prone to become fluffy and entangled with each other, and even entangled outside the filament disc, thereby affecting the normal operation of the 3D printer. CONTENT OF THE UTILITY MODEL

[0003] The present application aims to provide a back-winding material rack and a 3D printer applying the same, so as to solve the technical problem that the filament of the existing 3D printer is prone to become fluffy and entangled with each other.

[0004] In a first aspect, the present application provides a back-winding material rack for installation on a machine frame, comprising at least one back-winding material disc support for sleeving a filament disc, wherein the back-winding material disc support comprises:

[0005] a fixed shaft, a front end of the fixed shaft being used for suspension and fixed connection to the machine frame, and a rear end of the fixed shaft being disposed in a direction away from the machine frame;

[0006] a material disc shaft, the material disc shaft being sleeved and gap-disposed on the outer periphery of the fixed shaft and being capable of rotating around the outer periphery of the fixed shaft in a circumferential direction;

[0007] a clutch member, the clutch member being in contact with the fixed shaft and being fixedly disposed with the fixed shaft through an elastic compression assembly; and

[0008] a back-winding force storage module, comprising a first elastic member, one end of the first elastic member being fixedly connected with the clutch member, and the other end of the first elastic member being fixedly connected with the material disc shaft.

[0009] Wherein, a limiting mechanism is arranged between the clutch member and the material disc shaft.

[0010] Further, the limiting mechanism comprises a limiting rib and a first stopper, the rear end surface of the clutch member is provided with the limiting rib, and correspondingly, the inner wall of the shaft body of the material disc shaft is provided with the first stopper, and the limiting rib is capable of abutting against the first stopper.

[0011] Further, the elastic compression assembly comprises a compression shaft penetrating through the clutch member and a second elastic member, the clutch member is internally provided with a cavity, and a first through hole is arranged on the front end inner wall of the cavity.

[0012] The second elastic member is located in the cavity, and the second elastic member is sleeved on the outer periphery of the compression shaft and abuts against the front end inner wall of the cavity at one end and the inner wall of the end cap of the compression shaft at the other end;

[0013] The compression shaft has one end penetrating into the cavity of the clutch member, and the other end penetrating through the first through hole and being fixedly connected to the rear end of the fixed shaft.

[0014] Further, the elastic compression assembly further comprises a first gasket and a second gasket arranged on opposite sides of the second elastic member, the first gasket being fixedly compressed between the second elastic member and the front end inner wall of the cavity of the clutch member, and the second gasket being fixedly compressed between the second elastic member and the inner wall of the end cap of the compression shaft.

[0015] Further, the compression shaft, the second elastic member, the first gasket and the second gasket and the clutch member can rotate relative to each other; and / or

[0016] The first gasket and / or the second gasket are arranged in at least two layers; and / or

[0017] The compression shaft is a screw rod, and the second elastic member is a compression spring.

[0018] Further, the first elastic member is a volute spring; and / or

[0019] The rear end surface of the clutch member is provided with a hook, and one end of the first elastic member of the roll-back force storage module is fixedly connected to the hook.

[0020] Further, the roll-back force storage module further comprises an annular mounting groove, an inner circle of the annular mounting groove being sleeved on the outer periphery of the hook of the clutch member, the volute spring being sleeved in the annular mounting groove, an inner end of the volute spring being fixedly connected to the hook, an outer end of the volute spring being fixedly connected to the annular mounting groove, and the outer periphery of the annular mounting groove being provided with a clamping protrusion, and correspondingly, the material disc shaft is provided with a clamping groove fixedly clamped with the clamping protrusion; or

[0021] The material disc shaft is provided with a hook groove, an outer end of the volute spring being fixedly clamped in the hook groove, and an inner end of the volute spring being fixedly connected to the hook of the clutch member.

[0022] Further, the outer periphery of the tray shaft is provided with at least two support claw structures extending in the axial direction along the circumferential direction, the support claw structure comprising a support frame, a friction block and an elastic support plate, one end of the support frame being a fixed end, the fixed end being provided with a connecting through hole for connecting and fixing with the rear end of the tray shaft;

[0023] The friction block is mounted on the outer wall of the support frame and close to the position of the front end of the tray shaft, one end of the elastic support plate is mounted on the inner wall of the support frame, and the other end abuts against the wall surface of the outer periphery of the tray shaft.

[0024] Further, the fixed shaft and the tray shaft are provided with a limiting shaft to limit the axial displacement between the tray shaft and the fixed shaft.

[0025] In a second aspect, the application provides a 3D printer, comprising the rewinding material rack and a machine frame, the plurality of rewinding material disc supports of the rewinding material rack are arranged and installed on the machine frame in a spaced manner, and the outer periphery of each rewinding material disc support is correspondingly sleeved and fixed with a filament disc.

[0026] Compared with the prior art, the rewinding material rack and the 3D printer using the same provided by the application can be installed on the machine frame of the 3D printer, the rewinding material rack comprises at least one rewinding material disc support for sleeving a filament disc, the rewinding material disc support comprises a fixed shaft suspendedly and fixedly connected to the machine frame, a tray shaft sleeved and gap-connected to the outer periphery of the fixed shaft and capable of rotating around the outer periphery of the fixed shaft, a clutch member in contact with the rear end surface of the fixed shaft and pressed and fixed with the rear end surface of the fixed shaft through an elastic pressing assembly, so that a friction force is generated between the clutch member and the rear end surface of the fixed shaft to realize the clutch function, a rewinding force storage module having one end of a first elastic member fixedly connected to the clutch member and the other end fixedly connected to the tray shaft, and a limiting mechanism provided between the clutch member and the tray shaft.

[0027] In the printing process, the extruder pulls the filament for printing, the filament disc drives the disc shaft to rotate relative to the fixed shaft, at this time, the rewinding force storage module is driven by the disc shaft to rotate, and the first elastic member thereof starts to continuously store force until the limiting mechanism between the disc shaft and the clutch member is contacted, at this time, if it is needed to continue to rotate, it is needed to increase the rewinding force on the disc shaft, so that the torque applied to the limiting mechanism between the disc shaft and the clutch member is greater than the torque generated by the friction between the rear end surface of the clutch member and the fixed shaft, at this time, the disc shaft will drive the clutch member to slip relative to the fixed shaft and separate rotation, at this time, the clutch member, the disc shaft and the rewinding force storage module move together, in this stage, the rewinding force storage module stops storing force, thereby effectively controlling the force storage time and the force storage degree of the rewinding force storage module, and further controlling the filament rewinding, and protecting the rewinding force storage module from being damaged due to excessive force storage; and when the printing is completed or the material is needed to be withdrawn, the external force disappears, at this time, the first elastic member of the rewinding force storage module releases the elastic force to drive the disc shaft to rewind until the disc shaft is restored to the initial position relative to the clutch member, so that the withdrawn filament is rewound to the filament disc, and the rewinding function is completed.

[0028] In this way, the rewinding material rack provided by the application can not only keep the filament in a tension state during the printing process, effectively avoiding the problem of filament relaxation and thus avoiding the printing failure caused thereby, but also can realize the rewinding of the disc, can rewind the withdrawn filament to the filament disc, solve the problem that the filament is easy to be fluffy and entangled with each other, and improve the utilization rate of the filament and the stability of the printing; and the rewinding force storage module provided by the application can store the force of nearly one week (360°) of rewinding angle, at least can store the force of more than 300° of rewinding angle, greatly improve the rewinding force storage capacity, can support the high-frequency winding and unwinding operation, improve the printing efficiency and the printing stability, and can also control the rewinding force storage module to stop storing force, and protect the rewinding force storage module from damaging the mechanism due to excessive force storage. BRIEF DESCRIPTION OF DRAWINGS

[0029] In order to more clearly illustrate the technical solutions in the specific embodiments or the prior art, the drawings needed to be used in the specific embodiments or the prior art description will be briefly introduced. Obviously, the drawings in the following description are some embodiments of the application, and other drawings can also be obtained by those skilled in the art without creating laborious work.

[0030] Figure 1 The use state schematic view of the rewinding material rack provided by the embodiments of the application applied to the machine frame;

[0031] Figure 2 The structure schematic view of the rewinding disc support provided by the embodiments of the application;

[0032] Figure 3 A cross-sectional view of a roll-back material tray support according to an embodiment of the present application;

[0033] Figure 4 A partial structure view of a roll-back material tray support according to an embodiment of the present application;

[0034] Figure 5 A partial structure view of a roll-back material tray support according to an embodiment of the present application;

[0035] Figure 6 A structure view of a roll-back force storage module according to an embodiment of the present application;

[0036] Figure 7 A partial structure view of a roll-back material tray support according to another embodiment of the present application;

[0037] Figure 8 A side view of a roll-back material tray support according to an embodiment of the present application;

[0038] Figure 9 A structure view of a support claw according to an embodiment of the present application.

[0039] Reference signs:

[0040] 100 - roll-back material support;

[0041] 101 - roll-back material tray support;

[0042] 10 - fixed shaft;

[0043] 11 - first front end;

[0044] 12 - first rear end;

[0045] 20 - material tray shaft;

[0046] 21 - second front end;

[0047] 22 - second rear end;

[0048] 221 - mounting hole;

[0049] 23 - first stopper;

[0050] 24 - clamping groove;

[0051] 25 - clamping hook groove;

[0052] 30 - clutch;

[0053] 31 - third front end face;

[0054] 32 - third rear end face;

[0055] 33-limiting rib;

[0056] 34-cavity;

[0057] 341-front end inner wall;

[0058] 3411-first through hole;

[0059] 35-catch;

[0060] 40-elastic compression assembly;

[0061] 41-compression shaft;

[0062] 411-end cap;

[0063] 42-compression spring;

[0064] 43-first gasket;

[0065] 44-second gasket;

[0066] 50-reverse winding force storage module;

[0067] 51-scroll spring;

[0068] 511-inner end;

[0069] 512-outer end;

[0070] 52-annular mounting groove;

[0071] 521-engaging protrusion;

[0072] 60-supporting claw structure;

[0073] 61-supporting frame;

[0074] 62-friction block;

[0075] 63-elastic supporting plate;

[0076] 64-connection through hole;

[0077] 65-connection bolt;

[0078] 70-limiting shaft;

[0079] 80-pressing cover;

[0080] 200-machine frame. DETAILED DESCRIPTION

[0081] In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present application with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some but not all of the embodiments of the present application. The components of the embodiments of the present application described and shown in the drawings can be arranged and designed in various different configurations.

[0082] Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed application, but only represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work are within the scope of protection of the present application.

[0083] It should be noted that: similar reference numbers and letters represent similar items in the following drawings, therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0084] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship commonly placed when the product of the application is used, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", "third" and the like are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0085] In addition, the terms "horizontal", "vertical", "overhanging" and the like do not mean that the components must be absolutely horizontal or overhanging, but can be slightly inclined. For example, "horizontal" only means that its direction is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.

[0086] In the description of the present application, it should also be noted that, unless otherwise explicitly specified and limited, the terms "arrangement", "installation", "connection", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication inside two elements. For those of ordinary skill in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0087] Some embodiments of the present application will be described in detail with reference to the drawings. The following embodiments and features of the embodiments described below can be combined with each other without conflict.

[0088] As shown in Figures 1 to 9 , the present application provides a rewinding material rack 100, and a 3D printer applying the rewinding material rack 100. Specifically, the 3D printer can include a machine frame 200 and the rewinding material rack 100 provided by the present application, and the rewinding material rack 100 is used to be installed on the machine frame 200.

[0089] As shown in Figure 1 , the rewinding material rack 100 can be provided with at least one rewinding material disc support 101, which is installed on the machine frame 200. Preferably, a plurality of rewinding material disc supports 101 are provided, and are arranged at intervals and suspended on the machine frame 200, thereby improving the rewinding efficiency. The outer periphery of each rewinding material disc support 101 is correspondingly sleeved and fixed with a filament disc.

[0090] As shown in Figure 2 and Figure 3 , the rewinding material disc support 101 can specifically include a fixed shaft 10, a disc shaft 20, a clutch 30, a rewinding force storage module 50, and a gland 80. The front end (i.e. first front end 11) of the fixed shaft 10 is used to be suspended and fixedly connected to the machine frame 200, and the rear end (i.e. first rear end 12) of the fixed shaft 10 is protrudingly arranged away from the machine frame 200. The shaft body of the disc shaft 20 can be a cylindrical structure, which can be sleeved on the outer periphery of the fixed shaft 10, and is arranged with a gap with the outer periphery of the fixed shaft 10, and can rotate around the outer periphery of the fixed shaft 10 in the circumferential direction. The gland 80 is fixedly connected to the position of the rear end (i.e. second rear end 22) of the disc shaft 20.

[0091] The front end surface (i.e. third front end surface 31) of the clutch 30 is in contact with the rear end surface of the fixed shaft 10, and is fixedly arranged by the elastic pressing assembly 40. Thus, the friction force can be generated between the clutch 30 and the rear end surface of the fixed shaft 10, thereby realizing the clutch function. The rewinding force storage module 50 includes a first elastic member, which is preferably a volute spring 51. One end of the first elastic member is fixedly connected to the clutch 30, and the other end is fixedly connected to the disc shaft 20.

[0092] As shown in Figure 4As shown, the clutch 30 and the tray shaft 20 are provided with a limiting mechanism. The clutch 30 can be specifically implemented as follows, and the limiting mechanism can specifically include a limiting rib 33 and a first stopper 23. The rear end surface (i.e., the third rear end surface 32) of the clutch 30 is provided with the limiting rib 33, and the inner wall of the shaft body of the tray shaft 20 is provided with the first stopper 23. The limiting rib 33 can abut against the first stopper 23.

[0093] It should be understood that the "front end" and the "rear end" mentioned in the present application are two opposite ends, and the "front end" is the end close to the machine frame 200, and the "rear end" is the end away from the machine frame 200.

[0094] In this way, during the printing process, the extruder pulls the filament for printing, the filament tray drives the tray shaft 20 to rotate relative to the fixed shaft 10. At this time, the rewinding force storage module 50 is driven to rotate by the tray shaft 20, and the first elastic member of the rewinding force storage module 50 starts to continuously store force until the limiting mechanism between the tray shaft 20 and the clutch 30 is contacted (specifically, until the first stopper 23 of the tray shaft 20 is contacted with the limiting rib 33 of the clutch 30). At this time, if it is needed to continue to rotate, it is needed to increase the rotation force of the tray shaft 20, so that the torque applied to the limiting mechanism between the tray shaft 20 and the clutch 30 is greater than the torque generated by the friction force between the rear end surface of the clutch 30 and the fixed shaft 10 (specifically, the torque applied to the clutch 30 by the first stopper 23 of the tray shaft 20 is greater than the torque generated by the friction force between the clutch 30 and the rear end surface of the fixed shaft 10). At this time, the tray shaft 20 drives the clutch 30 to slip relative to the fixed shaft 10 and separate rotation. At this time, the clutch 30, the tray shaft 20 and the rewinding force storage module 50 move together. In this stage, the rewinding force storage module 50 stops storing force, thereby effectively controlling the force storage time and force storage degree of the rewinding force storage module 50, and further controlling the filament rewinding, and protecting the rewinding force storage module 50 from being damaged by excessive force storage. When the printing is completed or the material is needed to be withdrawn, the external force disappears. At this time, the first elastic member of the rewinding force storage module 50 releases the elastic force to drive the tray shaft 20 to rewind until the tray shaft 20 is restored to the initial position relative to the clutch 30, so as to rewind the withdrawn filament to the filament tray, and the rewinding function is completed.

[0095] Compared with the prior art, the spooling rack 100 provided by the embodiment of the application not only can keep the filament in a tensioned state during printing, effectively avoiding the problem of filament relaxation, and thus avoiding the printing failure caused thereby, but also can realize spooling of the tray, can wind the returned filament back to the filament tray, solves the problem that the filament is prone to be fluffy and entangled with each other, and further improves the utilization rate of the filament and the stability of printing; and the spooling force storage module 50 provided by the embodiment of the application can realize a spooling angle of one turn (360°) minus the angle occupied by the cross-sectional length of the first stop block 23, can achieve a spooling angle of nearly one turn (360°) for force storage, can realize a spooling angle of at least 300° for force storage, greatly improves the spooling force storage capacity, can support high-frequency winding and unwinding operations, improves the printing efficiency and the printing stability, and can also control the spooling force storage module 50 to stop storing force, and protect the spooling force storage module 50 from being damaged by excessive force storage.

[0096] As shown in Figures 1 to 5 , preferably, the first front end 11 of the fixed shaft 10 can be provided as a seat structure with a cross-sectional area larger than that of the shaft body, such as a circular, square, triangular or irregular flat structure, so that the contact area of the fixed connection is large and the installation is more stable; similarly, the front end (i.e. the second front end 21) of the tray shaft 20 can be provided as a seat structure with an outer diameter larger than that of the shaft body, to facilitate installation.

[0097] A specific embodiment is that, as shown in Figure 3 , the elastic compression assembly 40 can specifically include a compression shaft 41 provided in the clutch 30 and a second elastic member, the compression shaft 41 is preferably a screw rod, and the second elastic member is preferably a compression spring 42; the clutch 30 is internally provided with a cavity 34, the front end inner wall 341 of the cavity 34 is provided with a first through hole 3411 penetrating therethrough; the second elastic member is located in the cavity 34, and the second elastic member is sleeved on the outer periphery of the compression shaft 41, and one end of the second elastic member abuts against the front end inner wall 341 of the cavity 34, and the other end abuts against the inner wall of the end cap 411 of the compression shaft 41; one end of the compression shaft 41 provided with an end cap 411 is provided in the cavity 34 of the clutch 30, the other end of the compression shaft 41 passes through the first through hole 3411 and is screw-tightly fixedly connected to the rear end (i.e. the first rear end 12) of the fixed shaft 10, and specifically, the first rear end 12 of the fixed shaft 10 can be provided with a threaded hole for screw-tightly connecting and fixing the compression shaft 41 (such as a screw rod).

[0098] The compression shaft 41 compresses the second elastic member and is screwed and fixed on the rear end surface of the fixed shaft 10, the compressed second elastic member forms a certain elastic force, which is applied to the clutch member 30 and the rear end surface of the fixed shaft 10, so that a friction force is generated between the clutch member 30 and the rear end surface of the fixed shaft 10. Therefore, only when the rotation torque applied to the clutch member 30 is greater than the generated friction force, the clutch member 30 can slip and temporarily separate from the rear end surface of the fixed shaft 10. The clutch member 30 can rotate relative to the compression shaft 41 and the second elastic member, so that the clutch member 30 and the compression shaft 41 can be separated, thereby avoiding the clutch member 30 and the compression shaft 41 from moving together or being separated, and protecting the long-term use of the elastic compression assembly 40. That is, when the clutch member 30 rotates relative to the rear end surface of the fixed shaft 10, the compression shaft 41 can remain fixed with the fixed shaft 10, and the clutch member 30 rotates relative to the compression shaft 41, thereby protecting the long-term use of the elastic compression assembly 40 and realizing the repeated operation of the clutch function.

[0099] The second elastic member is preferably a compression spring 42. Compared with the existing elastic structure with a reinforcing rib, the reinforcing rib has a large deformation amount when compressed, is easy to wear, and the wear greatly affects the change of the friction force, which easily causes the clutch member 30 to slip in advance, causes the energy storage angle of the rewinding energy storage module 50 to be small, and the energy storage is insufficient. The second elastic member of the embodiment of the present application preferably adopts the compression spring 42, which is flexible in deformation and is not easy to wear when compressed, and the wear has little effect on the friction force, effectively prevents the clutch member 30 from slipping in advance, ensures that the rewinding energy storage module 50 meets the expected energy storage angle, and slips when reaching the specified stop energy storage position. The specified stop energy storage position is the position when the first stop block 23 of the tray shaft 20 contacts the limiting rib 33 of the clutch member 30. At this time, when the torque applied by the first stop block 23 on the clutch member 30 is greater than the torque generated by the friction force between the clutch member 30 and the rear end surface of the fixed shaft 10, the tray shaft 20 drives the clutch member 30 to slip relative to the fixed shaft 10 and separate from the fixed shaft 10.

[0100] Further, the elastic compression assembly 40 can further include a first washer 43 and a second washer 44 arranged on opposite sides of the second elastic member. The first washer 43 is tightly fixed between the second elastic member and the front end inner wall 341 of the cavity 34 of the clutch member 30, and the second washer 44 is tightly fixed between the second elastic member and the inner wall of the end cap 411 of the compression shaft 41. The clutch member 30 and the first washer 43 and the second washer 44 can also rotate relative to each other, so that when the clutch member 30 rotates relative to the compression shaft 41 and separates from the compression shaft 41, the first washer 43 and the second washer 44 also separate together, thereby protecting the long-term use of the elastic compression assembly 40.

[0101] The setting of the aforementioned gaskets (the first gasket 43 and the second gasket 44) can play a role of buffering between structures when the compression shaft compresses the second elastic member to be screwed, and can prevent the clutch member 30 from driving the compression spring 42 and the compression shaft 41 to be loosened, thereby reducing the friction between the clutch member 30 and the fixed shaft 10, and causing the clutch function of the clutch member 30 to be abnormal, resulting in early slippage and even affecting the force storage angle of the force storage module 50. In order to ensure better clutch effect, preferably, the first gasket 43 and the second gasket 44 can be stacked at least two.

[0102] A specific embodiment is that, as shown in Figures 3 to 5 and Figure 7 , the rear end face of the aforementioned clutch member 30 can be provided with a hook 35, and one end of the first elastic member of the aforementioned force storage module 50 can be fixedly connected with the hook 35 of the clutch member 30.

[0103] Further, regarding the force storage module 50, an optional embodiment is that, as shown in Figure 3 , Figure 5 and Figure 6 , the force storage module 50 can further include an annular mounting groove 52, the inner circle of the annular mounting groove 52 is sleeved on the outer periphery of the hook 35 of the aforementioned clutch member 30, the volute spring 51 is sleeved in the annular mounting groove 52, the inner end 511 of the volute spring 51 is fixedly connected with the hook 35 located in the inner circle, the outer end 512 of the volute spring 51 is fixedly connected with the annular mounting groove 52, and the outer periphery of the annular mounting groove 52 is provided with a clamping protrusion 521, and correspondingly, the tray shaft 20 is provided with a clamping groove 24 fixedly clamped with the clamping protrusion 521, so as to realize that the tray shaft 20 drives the annular mounting groove 52 to rotate together, thereby driving the volute spring 51 fixedly connected with the inner circle to rotate relative to the inner circle, continuously storing force, until reaching a designated stop force storage position, thereby realizing effective force storage function, and further, the rear end face of the annular mounting groove 52 can be provided with a cover to protect the volute spring 51 installed therein. The setting of the annular mounting groove 52 can assist in realizing the force storage function, and mainly plays a role of auxiliary installation, thereby increasing work efficiency and safety.

[0104] Another more simplified embodiment is that, as shown in Figure 7 , the tray shaft 20 can be provided with a hook groove 25, the outer end 512 of the volute spring 51 can be clamped and fixed in the hook groove 25, and the inner end 511 of the volute spring 51 is fixedly connected with the hook 35 of the clutch member 30. This implementation is relatively simple and simple compared with the previous embodiment, and can also realize the force storage function, and both of the two implementation modes can be selected.

[0105] In addition, a preferred embodiment is that, as shown in Figure 2, Figure 5 , Figure 8 and Figure 9 As shown in the figure, the outer periphery of the material tray shaft 20 provided in this application embodiment may be provided with at least two support claw structures 60 extending in the axial direction. As shown in the figure, this application embodiment takes three support claw structures 60 evenly spaced in the circumferential direction as an example for specific explanation. Setting three support claw structures 60 provides more stable support, and the inner ring of the wire tray is sleeved on the outer periphery of each support claw structure 60.

[0106] Specifically, the support claw structure 60 may include a support frame 61, a friction block 62, and an elastic support sheet metal 63. One end of the support frame 61 is a fixed end, which is provided with a connecting through hole 64 for connecting and fixing to the rear end (i.e., the second rear end 22) of the material tray shaft 20. Correspondingly, the second rear end 22 of the material tray shaft 20 may also be provided with a matching mounting hole 221. The connecting through hole 64 and the mounting hole 221 can be fixedly connected by connecting bolts 65.

[0107] The friction block 62 is installed on the outer wall of the support frame 61 and near the front end (i.e., the second front end 21) of the material tray shaft 20. The friction block 62 is used to increase the friction with the inner ring of the wire tray. One end of the elastic support sheet metal 63 is installed on the inner wall of the support frame 61, and the other end abuts against the outer circumferential wall of the material tray shaft 20. The elastic support sheet metal 63 is elastic. When the inner diameter of the wire tray is smaller than the outer diameter of the rewind tray bracket 101 (that is, the outer diameter of the circumference formed by the outer walls of each support claw structure 60), the wire tray can compress the elastic support sheet metal 63 inward and generate a certain rebound force when it is sleeved, so as to ensure that the friction block 62 contacts the inner wall of the wire tray and the sleeve is tighter and more secure.

[0108] Furthermore, the outer diameter of the circumference formed by the outer walls of each support claw structure 60 is preferably 60mm, so that it can be adapted to various conventional wire reels on the market.

[0109] Another preferred embodiment is, as Figure 2 As shown, a limiting shaft 70 can be provided between the fixed shaft 10 and the material tray shaft 20 in the embodiment of this application to limit the axial displacement between the material tray shaft 20 and the fixed shaft 10 and ensure normal rotation.

[0110] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A rewind stand for mounting to a machine frame, characterized by, The reel holder comprises at least one reel bracket for sleeving a wire reel, the reel bracket comprises: a fixed shaft, the front end of which is used for suspension fixed connection to the machine frame, and the rear end thereof is arranged in a direction away from the machine frame; a reel shaft, which is sleeved and gap arranged on the outer periphery of the fixed shaft and can rotate around the outer periphery of the fixed shaft in a circumferential direction; a clutch member, which is in contact with the fixed shaft and is fixedly arranged with the fixed shaft through an elastic compression assembly; and a reel storage module, which comprises a first elastic member, one end of the first elastic member is fixedly connected with the clutch member, and the other end is fixedly connected with the reel shaft; wherein, a limiting mechanism is arranged between the clutch member and the reel shaft.

2. The roll stand of claim 1, wherein, The limiting mechanism comprises a limiting rib and a first stopper, the rear end surface of the clutch member is provided with the limiting rib, and correspondingly, the inner wall of the shaft body of the reel shaft is provided with the first stopper, and the limiting rib can abut against the first stopper.

3. The reel holder according to claim 1, wherein the elastic compression assembly comprises a compression shaft and a second elastic member, the clutch member is provided with a cavity, and the front end inner wall of the cavity is provided with a first through hole; the second elastic member is located in the cavity, and the second elastic member is sleeved on the outer periphery of the compression shaft and abuts against the front end inner wall of the cavity at one end and the inner wall of the end cap of the compression shaft at the other end; one end of the compression shaft provided with the end cap is arranged in the cavity of the clutch member, and the other end thereof passes through the first through hole and is fixedly connected to the rear end of the fixed shaft.

4. The reel holder according to claim 3, wherein the elastic compression assembly further comprises a first gasket and a second gasket arranged on opposite sides of the second elastic member, the first gasket is fixedly arranged between the second elastic member and the front end inner wall of the cavity of the clutch member, and the second gasket is fixedly arranged between the second elastic member and the inner wall of the end cap of the compression shaft.

5. The reel holder according to claim 4, wherein the compression shaft, the second elastic member, the first gasket and the second gasket and the clutch member can rotate relative to each other; and / or the first gasket and / or the second gasket are arranged in at least two layers; and / or the compression shaft is arranged as a screw rod, and the second elastic member is arranged as a compression spring.

6. The reel holder according to any one of claims 1-5, wherein the first elastic member is arranged as a volute spring; and / or the rear end surface of the clutch member is provided with a hook, and one end of the first elastic member of the reel storage module is fixedly connected with the hook.

7. The reel holder according to claim 6, wherein The roll-back force storage module further comprises an annular mounting groove, an inner ring of the annular mounting groove is sleeved on an outer periphery of the catch of the clutch, the volute spring is sleeved in the annular mounting groove, an inner end of the volute spring is fixedly connected with the catch, an outer end of the volute spring is fixedly connected with the annular mounting groove, and an outer periphery of the annular mounting groove is provided with a clamping protrusion, and correspondingly, the material disc shaft is provided with a clamping groove fixedly clamped with the clamping protrusion. The material disc shaft is provided with a catch groove, the outer end of the volute spring is fixedly connected in the catch groove, and the inner end of the volute spring is fixedly connected with the catch of the clutch.

8. The roll-back material rack according to claim 1, wherein, An outer periphery of the material disc shaft is provided with at least two support claw structures extending in an axial direction along a circumferential direction of the material disc shaft, the support claw structure comprises a support frame, a friction block and an elastic support sheet metal, one end of the support frame is a fixed end, and the fixed end is provided with a connecting through hole for being fixedly connected with the rear end of the material disc shaft; The friction block is mounted on an outer wall of the support frame and is close to the front end of the material disc shaft, one end of the elastic support sheet metal is mounted on an inner wall of the support frame, and the other end abuts against a wall surface of the outer periphery of the material disc shaft.

9. The roll-back material rack according to claim 1, wherein, A limiting shaft is arranged between the fixed shaft and the material disc shaft to limit the axial displacement between the material disc shaft and the fixed shaft.

10. A 3D printer characterized by, The roll-back material rack comprises a roll-back material rack according to any one of claims 1-9, and a machine frame, a plurality of roll-back material disc supports of the roll-back material rack are arranged and installed on the machine frame at intervals, and a corresponding material disc is fixedly sleeved on an outer periphery of each roll-back material disc support.

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