CN108082975A - Unwinding device - Google Patents

Abstract

A reeling device includes two chucks capable of respectively tightening/loosening the two ends of a barrel and a driving mechanism for driving the two chucks to move; each chuck includes a transmission shaft and a plurality of anti-skid tiles matched with the transmission shaft and a plurality of inclined blocks correspondingly fixed to the inner side of the anti-skid tiles; the outer periphery of the front end of the transmission shaft is provided with a plurality of grooves extending axially, and each groove has an inclined groove bottom that is deep in the front and shallow in the rear; the inclined blocks are correspondingly received in the grooves and can move along the inclined groove bottom and simultaneously displace along the radial and axial directions of the transmission shaft, so that the diameter of the cylindrical surface formed by the outer contours of the anti-skid tiles can be enlarged until the barrel is tightened. The present invention has a compact structure, can protect the barrel from being damaged, and can also facilitate loading and unloading operations.

Description

Unwinding device

technical field

The invention relates to an unwinding device, in particular to an unwinding device suitable for large-diameter materials.

Background technique

For materials with large roll diameter, shaftless unwinding is a common unwinding method that is more convenient for loading materials. Common shaftless unwinding mainly has two types: top cone head structure and pneumatic expansion collet structure.

Referring to FIG. 1 , an unwinding device 10a with a cone head structure generally includes: a left chuck assembly 3 , a right chuck assembly 4 and a driving mechanism 5 . Wherein, the left chuck assembly 3 and the right chuck assembly 4 each have a cone head 31a, 41a, which can be driven to extend into/exit from the barrel 20. A roll 30 is wound on the cartridge 20 . In this unwinding structure, one end of the right chuck assembly 4 needs a cylinder 45 with a longer stroke to drive, thus resulting in a larger width dimension of the entire unwinding device 10a, a large space occupation, and insufficient compactness, and the top cone head 31a , 41a is easy to damage the barrel 20. In addition, the cylinder 45 is also easy to collide with external mobile facilities such as loading trucks and be damaged.

Referring to FIG. 2 , an unwinding device 10 b with a pneumatic expansion collet structure generally includes: a left collet assembly 3 , a right collet assembly 4 and a driving mechanism 5 . Wherein, the left chuck assembly 3 and the right chuck assembly 4 each have a pneumatic expansion chuck 31b, 41b, which can be driven to extend into/exit from the barrel 20. The material roll 30 is wound on the material cylinder 20 . Although this unwinding structure is greatly improved in avoiding damage to the barrel 20, because the two pneumatic expansion chucks 31b, 41b all need compressed air to lift the expansion blocks to achieve expansion, so when the unwinding Both sides of the roll device 10b must prepare air guns to deliver the compressed air into the air inlets 37, 47, and after the roll material 30 is unloaded, when the barrel 20 needs to be taken off, the air must be deflated manually. It is possible to make the two pneumatic expansion chucks 31b, 41b exit the barrel 20, but there is still the problem of not being compact enough, and it is quite inconvenient to operate, and the labor intensity of the operator is relatively high. It can be seen that there is a need for further improvement.

Contents of the invention

The technical problem to be solved by the present invention is to overcome the disadvantages of the above-mentioned prior art, and propose an unwinding device with a compact structure, which can not only protect the barrel from being damaged by jacking, but also facilitate loading and unloading operations.

The present invention proposes an unwinding device aiming at the above-mentioned technical problems, including two chucks that can respectively expand/loosen two ends of a barrel and a driving mechanism for driving the movement of the two chucks; each chuck includes The transmission shaft and a plurality of anti-slip tiles matched with the transmission shaft and a plurality of inclined blocks correspondingly fixed on the inside of these anti-slip tiles; the outer circumference of the front end of the transmission shaft is recessed with a plurality of grooves along the axial direction , each channel has an inclined groove bottom deep at the front and shallow at the back; these inclined blocks are correspondingly accommodated in these grooves and can move along the inclined groove bottom and simultaneously displace along the radial and axial directions of the transmission shaft, so that these anti-slip tiles The diameter of the cylindrical surface formed by the outer contour of the cylinder can become larger until the cylinder is tightened.

In some embodiments, each chuck also includes a spring against the rear ends of these anti-skid tiles, corresponding to the diameter of the cylindrical surface formed by the outer contours of these anti-skid tiles gradually increases, and the spring is gradually compressed under force .

In some embodiments, each collet further includes a gland mounted on the front end of the transmission shaft for confining the ramps in the channels.

In some embodiments, at least three T-shaped grooves are evenly distributed on the outer periphery of the front end of the transmission shaft, and each groove corresponds to a slanting block and an anti-slip tile.

In some embodiments, a flange is provided at the rear end of each anti-slip tile, and the outer diameter of the flange is larger than the inner diameter of the barrel.

In some embodiments, the cross-sectional structure of each inclined block along the axial direction of the transmission shaft is in the shape of a right-angled trapezoid, and the side mating with the anti-slip tile corresponds to the straight waist of the right-angled trapezoid.

In some embodiments, the driving mechanism includes a lead screw driving assembly and an air cylinder driving assembly respectively used to drive the displacement of the two chucks.

In some embodiments, the unwinding device further includes a deviation correction system, and the deviation correction system includes a deviation correction connecting plate and a deviation correcting actuator; the lead screw driving assembly and the air cylinder driving assembly are mounted on the deviation correcting connecting plate.

In some embodiments, the screw driving assembly includes a motor fixed on the deviation correction connecting plate, a screw driven by the motor and a nut matched with the screw, and a collet driven by the screw driving assembly It is fixed on the nut; the air cylinder drive assembly includes an air cylinder capable of pushing the deviation correction connecting plate.

In some embodiments, the cylinder is controlled by a three-position closed-in manual valve.

Compared with the prior art, the unwinding device of the present invention cleverly designs the two chucks as a channel with an inclined groove bottom at the front end of the transmission shaft; The bottom can be displaced along the axial and radial directions of the drive shaft at the same time, only need to drive the two chucks to move closer/separate to realize the expansion/loosening of the two chucks to the barrel, the structure is compact, both It can protect the barrel from being damaged by the top, and can also facilitate the loading and unloading operation.

Description of drawings

Fig. 1 is a schematic diagram of an existing top-cone type unwinding device.

Fig. 2 is a schematic diagram of an existing pneumatic expansion collet unwinding device.

Fig. 3a and Fig. 3b are respectively the front view and top view of the driving part in the unwinding device of the present invention.

Fig. 4a and Fig. 4b are schematic axial cross-sectional views of two chucks of the present invention for loosening and clamping respectively.

Fig. 5a and Fig. 5b are schematic axial cross-sectional views of two chucks of the present invention, respectively.

Fig. 6a and Fig. 6b are partial enlarged schematic diagrams of the axial section of the chuck loosening and clamping of the present invention, respectively.

Fig. 7 is a schematic radial cross-sectional view of the collet in the unwinding device of the present invention, wherein the oblique block is removed.

Wherein, the reference signs are explained as follows: prior art, 10a, 10b unwinding device 20 material barrel 30 material roll 3 left chuck assembly 4 right chuck assembly 5 driving mechanism 31a, 41a top cone head 31b, 41b pneumatic expansion clamp Head 37, 47 air inlet 45 cylinder; the present invention, 10 unwinding device 20 material barrel 30 material roll 5 deviation correction system 6 screw drive assembly 7 cylinder drive assembly 8 chuck 51 deviation correction connecting plate 52 deviation correction actuator 61 motor 62 wire Rod 63 nut 801 base 803 transmission shaft 805 bearing 807 spring 809 anti-slip tile 811 inclined block 813 gland 815 retaining ring 8031 front end 8033 channel 8091 flange.

Detailed ways

The preferred embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings of this specification.

Referring to Fig. 3a to Fig. 7, Fig. 3a and Fig. 3b are schematic front view and top view respectively of the driving mechanism in the unwinding device of the present invention. Fig. 4a and Fig. 4b are schematic axial cross-sectional views of two chucks of the present invention for loosening and clamping respectively. Fig. 5a and Fig. 5b are schematic axial cross-sectional views of two chucks of the present invention, respectively. Fig. 6a and Fig. 6b are partial enlarged schematic diagrams of the axial section of the chuck loosening and clamping of the present invention, respectively. Fig. 7 is a schematic radial cross-sectional view of the collet in the unwinding device of the present invention, wherein the oblique block is removed. The present invention proposes a new type of unwinding device 10, which is well suited for unwinding coils 30 with large diameters. The unwinding device 10 roughly includes: two chucks 8, which can respectively expand/loosen the two ends of a material barrel 20; The chuck 8 can be extended into/exit from one end of the barrel 20; the cylinder driving assembly 7 is used to drive the other chuck 8 on the right side to move laterally, so that the chuck 8 can extend into/exit from the material. the other end of the cylinder 20; and the correcting system 5. It can be understood that the screw drive assembly 6 and the air cylinder drive assembly 7 jointly constitute a drive mechanism for driving the two chucks 8 to move.

Referring to FIG. 3 a and FIG. 3 b , the deflection correction system 5 includes a deflection correction connecting plate 51 and a deflection correction actuator 52 capable of pushing the deflection correction connecting plate 51 to move. The screw driving assembly 6 includes a motor 61 fixed on the deviation correcting connecting plate 51 , a screw 62 driven by the motor 61 and a nut 32 matched with the screw 62 . The air cylinder driving assembly 7 includes an air cylinder with one end connected to the deviation correcting connecting plate 51 .

It can be understood that the nut 63 is secured by the collet 8 on the left side, and the collet 8 can be driven by the motor 61 to move laterally. The chuck 8 positioned on the right side is installed on a chuck seat (not shown), and the chuck seat is connected with the other end of the cylinder of the cylinder driving assembly 7, so that the chuck 8 can be driven by the cylinder driving assembly 7 The cylinder is driven to move laterally. One end of the deflection correction actuator 52 is connected to a frame (not shown in the figure), and the other end is connected to the deflection correction connecting plate 51 . The deviation-correction actuator 52 can push the deviation-correction connecting plate 51 and the two chucks 8 installed on the deviation-correcting connecting plate 51 to move as a whole, so as to achieve the purpose of deviation correction.

Referring to Fig. 4a and Fig. 4b, when the two chucks 8 are in the unclamped state, that is: the two chucks 8 are separated from the two ends of the barrel 20, at this moment the two anti-slip tiles 809 will not press against the barrel. 20 produces a tightening effect, and the two ends of the inner hole of the barrel 20 have first inner diameters d1, d2. When the two chucks 8 are in the clamped state, that is to say: the two chucks 8 are combined with the two ends of the barrel 20, at this time the two anti-skid tiles 809 will have an expansion effect on the barrel 20, and the barrel The inner bore of 20 has a second inner diameter d3, d4.

It can be understood that the anti-slip tiles 809 of the two chucks 8 can be firmly connected with the barrel 20 by virtue of the expansion effect. Due to the expansion effect of the anti-skid tiles 809, the second inner diameters d3, d4 are larger than the first inner diameters d1, d2.

5a and 5b, the chuck 8 includes a base 801, a transmission shaft 803, a bearing 805, a spring 807, an anti-slip tile 809, an inclined block 811, a gland 813 and a retaining ring 815. Wherein, the transmission shaft 803 is rotatably mounted on the base 801 through a bearing 805 . The spring 807 is installed between the base 801 and the anti-skid tile 809 , and abuts against the rear end of the anti-skid tile 809 . The oblique block 811 fixes the inner side of the anti-slip tile 809 , and installs the front end of the transmission shaft 803 so as to be movable along the axial and radial directions of the transmission shaft 803 . The gland 813 defines the inclined block 811 at the front end 8031 of the transmission shaft 803 . The rear end of the anti-slip tile 809 is provided with a flange 8091, the outer diameter of the flange 8091 is greater than the inner diameter of the barrel 20, and can limit the chuck 8 in the loosened state, only the anti-skid tile 809 except Other parts than the flange 8091 can protrude into the inner hole of the cartridge 20 . The retaining ring 815 is installed between the flange 8091 and the end of the spring 807 .

Referring to FIG. 6 a , FIG. 6 b and FIG. 7 , the front end 8031 of the transmission shaft 803 is recessed with four grooves 8033 extending in the axial direction. Each groove 8033 is deep at the front and shallow at the rear, and has an inclined groove bottom. Each channel 8033 corresponds to one inclined block 811 and one anti-slip tile 813 . The inclined blocks 811 are correspondingly installed in these grooves 8033 and can move along the bottom of the inclined grooves and simultaneously displace along the radial and axial directions of the transmission shaft 803, so that the diameter of the cylindrical surface formed by the outer contours of these anti-slip tiles 809 able to change. The enlarged diameter of the cylindrical surface can make the barrel 20 be tightened; on the contrary, the reduced diameter of the cylindrical surface can make the barrel 20 loose. The cross-sectional structure of each inclined block 811 along the axial direction of the transmission shaft 803 is in the shape of a right-angled trapezoid, wherein the side that cooperates with the anti-slip tile 809 corresponds to the straight waist of the right-angled trapezoid, and the inclined groove bottom of the channel 8033 The mating side corresponds to the oblique waist of the right-angled trapezoid.

This structure can make the diameter of the cylindrical surface formed by the outer contours of these anti-slip tiles 809 change quite smoothly. When the chuck 8 is in the loosened state, the spring 807 is in the open state, the inclined block 811 moves to the front end of the channel 8033 , and the outer contour of the flange 8091 is basically the same as that of the retaining ring 815 . On the contrary, when the collet 8 is in the clamping state, the spring 807 is in the compressed state, the inclined block 811 moves to the rear end of the channel 8033 , and the outer contour of the flange 8091 exceeds the outer contour of the retaining ring 815 .

It is worth mentioning that, in this embodiment, four grooves 8033 are evenly distributed on the outer periphery of the front end 8031 of the transmission shaft 803 . In other embodiments, the outer circumference of the front end 8031 of the transmission shaft 803 may have three grooves 8033 evenly distributed, or more than five grooves 8033 . In this embodiment, the channel 8033 is T-shaped. In other embodiments, the channel 8033 may not be T-shaped, for example: L-shaped.

4a and 4b, when feeding, the two chucks 8 are driven close together, due to the reaction of the material cylinder 20, the anti-slip tiles 809 will move along the groove 8033 on the transmission shaft 803 with the inclined block 811 to face each other Direction sliding (that is, the anti-slip tile 809 on the left side is to the left, and at the same time, the anti-slip tile 809 on the right side is to the right), the spring 807 is compressed, and the diameter of the cylindrical surface formed by the outer contours of these anti-slip tiles 809 changes at the same time. The tiles 809 protrude outward (that is, the diameter becomes larger) and enter the clamping state, and the barrel 20 is expanded accordingly. Conversely, when the barrel 20 is to be removed, the two chucks 8 are driven to separate, and due to the restoring force of the spring 807, the anti-slip tiles 809 will move along the groove 8033 on the transmission shaft 803 along with the inclined block 811 to the opposite direction. Slide (that is, the anti-slip tile 809 on the left side is to the right, and at the same time, the anti-slip tile 809 on the right side is to the left), the anti-slip tile 809 is retracted inward (that is, the diameter becomes smaller), and returns to the relaxed state, and the barrel 20 is then If it is loose, it can be removed manually or by supporting facilities.

It is worth mentioning that, in this embodiment, the air cylinder of the air cylinder driving assembly 7 is controlled by a three-position center-closed manual valve. When feeding, just put the material cylinder 20 between the two clamps 8, adjust the height of the center of the material cylinder 20 to be equal to the height of the clamps 8, and then manually operate the valve handle to drive the cylinder on the right side of the material cylinder 20. Chuck 8 moves to the left, and due to the limiting effect of flange 8091, the movement of chuck 8 to the left will drive the anti-skid tile 809 and the inclined block 811 on it to move to the right along the channel 8033 until the chuck 8 will The ends of the barrel 20 are stretched tight.

Compared with the prior art, the unwinding device 10 of the present invention, by ingeniously designing the two chucks 8 so that the front end 8031 of the drive shaft 803 has a channel 8033 with an inclined groove bottom; The inclined groove bottom of the 811 tracking channel 8033 can be displaced along the axial and radial directions of the transmission shaft 803 at the same time, only need to drive the two chucks 8 to move closer/separate, and the two chucks 8 can realize the pair of barrels 20 tension/loosen, compact structure, not only can protect the barrel from being damaged, but also can facilitate loading and unloading operations.

The above content is only a preferred embodiment of the present invention, and is not intended to limit the implementation of the present invention. Those of ordinary skill in the art can easily make corresponding modifications or modifications according to the main concept and spirit of the present invention. Therefore, the present invention The scope of protection should be subject to the scope of protection required by the claims.

Claims (10)

1. An unwinding device, comprising two chucks that can respectively expand/loosen two ends of a barrel and a driving mechanism for driving the two chucks to move; it is characterized in that each chuck includes a transmission Shaft and a plurality of anti-slip tiles matched with the transmission shaft and a plurality of inclined blocks correspondingly fixed on the inside of these anti-slip tiles; the outer circumference of the front end of the transmission shaft is recessed with a plurality of grooves extending axially, Each channel has an inclined groove bottom deep at the front and shallow at the rear; these inclined blocks are correspondingly accommodated in these grooves and can move along the inclined groove bottom and simultaneously displace along the radial and axial directions of the transmission shaft, so that the anti-skid tiles The diameter of the cylindrical surface formed by the outer contour can increase until the cartridge is stretched. 2. The unwinding device according to claim 1, wherein each chuck also includes a spring against the rear end of these anti-slip tiles, corresponding to the diameter of the cylindrical surface formed by the outer contours of these anti-slip tiles Gradually getting larger, the spring is stressed and gradually compressed. 3. The unwinding device according to claim 1, wherein each chuck further comprises a gland mounted on the front end of the transmission shaft, for limiting the inclined blocks in the grooves. 4. The unwinding device according to claim 1, wherein at least three T-shaped grooves are evenly distributed on the outer periphery of the front end of the transmission shaft, and each groove corresponds to a slanting block and an anti-slip shoe piece. 5. The unwinding device according to claim 1, wherein a flange is provided at the rear end of each anti-slip tile, and the outer diameter of the flange is larger than the inner diameter of the barrel. 6. The unwinding device according to claim 1, characterized in that, the cross-sectional structure of each inclined block along the axial direction of the transmission shaft is a right-angled trapezoid, and the side that cooperates with the anti-slip tile corresponds to the right-angled trapezoid. straight waist. 7. The unwinding device according to any one of claims 1 to 6, characterized in that the drive mechanism comprises a screw drive assembly and a cylinder drive assembly respectively used to drive the displacement of the two chucks. 8. The unwinding device according to claim 7, characterized in that, the unwinding device also includes a deviation correction system, the deviation correction system includes a deviation correction connecting plate and a deviation correction actuator; the lead screw drive assembly and the cylinder drive assembly are installed on the webbing. 9. The unwinding device according to claim 8, wherein the screw drive assembly includes a motor fixed on the deviation correction connecting plate, a screw driven by the motor and a nut matched with the screw , the collet driven by the screw drive assembly is fixed on the nut; the air cylinder drive assembly includes an air cylinder capable of pushing the deviation correction connecting plate. 10. The unwinding device according to claim 9, characterized in that the air cylinder is controlled by a three-position center-sealed manual valve.