Spinning mechanism

Abstract

The present application discloses a spinning mechanism, which includes: a base; a driving shaft, located on the base; a first support arm, one end of the first support arm is hinged to the driving shaft, and the other end of the first support arm is provided with a first roller; a second support arm, one end of the second support arm is hinged to the driving shaft, and the other end of the second support arm is provided with a second roller; wherein the second support arm corresponds to the first support arm, the first roller and the second roller are arranged crosswise, and a transmission structure is arranged on the driving shaft, the first support arm and the second support arm, so that the driving shaft drives the first roller and the second roller to rotate, there is a gap between the first roller and the second roller, and the rotation direction of the first roller is opposite to that of the second roller. The spinning mechanism spins the metal tube through two rollers, so that the diameter of the tube is reduced, the cracking, bending and other defects in the tube shrinking process are reduced, and the product yield and processing efficiency are improved.

Description

Technical Field

[0001] The invention relates to the technical field of tube parts processing, and more specifically, to a spinning mechanism. Background Art

[0002] The tube shrinking machine is a device used to process metal tubes. It applies radial force to the metal tube to shrink it radially, thereby changing the diameter of the tube. The tube shrinking machine is widely used in the processing and forming of connecting parts such as pipe fittings, automobile oil pipes, air ducts, water pipes, and air conditioning pipes.

[0003] Most of the existing tube shrinking machines are hydraulic tube shrinking machines, which require corresponding molds to achieve tube shrinking processing. For thin-walled tubes or materials with smaller diameters, existing tube shrinking machines are usually difficult to complete the diameter reduction processing, and defects such as cracking and bending often occur. Summary of the invention

[0004] The purpose of the present invention is to provide a spinning mechanism, which can be used in a tube shrinking machine. The metal tube is spun by two hyperbolic rollers so that its tube diameter can be reduced, thereby reducing defects such as cracking and bending in the tube shrinking process and improving the product yield. Furthermore, the tube diameter can be reduced by the spinning mechanism, and the processing is more continuous and smooth with high processing efficiency.

[0005] The present invention provides a spinning mechanism, comprising: a base; a driving shaft, located on the base; a first support arm, one end of the first support arm is hinged to the driving shaft, and the other end of the first support arm is provided with a first roller; a second support arm, one end of the second support arm is hinged to the driving shaft, and the other end of the second support arm is provided with a second roller; wherein, the second support arm corresponds to the first support arm, the first roller and the second roller are cross-arranged, a transmission structure is arranged on the driving shaft, the first support arm and the second support arm, so that the driving shaft drives the first roller and the second roller to rotate, there is a gap between the first roller and the second roller, and the rotation direction of the first roller is opposite to the rotation direction of the second roller.

[0006] Optionally, both the first roller and the second roller are compound hyperbolic rollers.

[0007] Optionally, an adjustment unit is further included, and the adjustment unit adjusts the angle between the first support arm and the second support arm to change the size of the gap between the first roller and the second roller.

[0008] Optionally, the adjustment unit includes: two adjustment blocks, which are respectively hinged to the first support arm and the second support arm; and a lead screw, which connects the two adjustment blocks; wherein at least one of the two adjustment blocks is provided with a threaded hole matching the lead screw, and the distance between the two adjustment blocks can be adjusted by rotating the lead screw, thereby changing the angle between the first support arm and the second support arm.

[0009] Optionally, a holding unit is further included. When the angle between the first support arm and the second support arm changes, the holding unit causes the first support arm and the second support arm to rotate synchronously in opposite directions to avoid deviation of the feed axis.

[0010] Optionally, the holding unit includes: a first bevel gear ring, which is located at one end of the first support arm and connected to the first support arm, the first bevel gear ring is arranged around the drive shaft, and the first bevel gear ring faces the second support arm; a second bevel gear ring, which is located at one end of the second support arm and connected to the second support arm, the second bevel gear ring is arranged around the drive shaft, and the second bevel gear ring faces the first support arm; a bevel gear, which is hinged to the base, the bevel gear is located between the first bevel gear ring and the second bevel gear ring, and is respectively meshed with the first bevel gear ring and the second bevel gear ring; wherein, the first bevel gear ring is connected to the second bevel gear ring through the bevel gear, so that the first bevel gear ring and the second bevel gear ring rotate synchronously in opposite directions.

[0011] In the above-mentioned spinning mechanism, the driving shaft drives the first roller to rotate through a secondary transmission.

[0012] Optionally, a first support tube is provided on the side of the first support arm, a transmission shaft is provided in the first support tube, an inclined third support tube is provided at the other end of the first support arm, a transmission shaft is also provided in the third support tube, and one end of the transmission shaft is connected to the first roller.

[0013] Optionally, the driving shaft drives the second roller to rotate through a secondary transmission.

[0014] Optionally, a second support cylinder is provided on the side of the second support arm, a transmission shaft is provided in the second support cylinder, an inclined fourth support cylinder is provided at the other end of the second support arm, the fourth support cylinder corresponds to the third support cylinder, a transmission shaft is also provided in the fourth support cylinder, and one end of the transmission shaft is connected to the second roller, and the second roller intersects with the first roller.

[0015] The advantages and beneficial effects of the present invention are as follows: the present invention provides a spinning mechanism, which has a simple and reliable structure, can be continuously fed, has high production efficiency, a high degree of automation and good product consistency, and spins the metal tube by two composite hyperbolic rollers so that its tube diameter can be reduced, significantly reducing defects such as cracking and bending in the tube shrinking process, and improving the product yield. Furthermore, the spinning mechanism can also adjust the tube diameter size after spinning through an adjustment unit, and the adjustment will not affect the feed axis. The spinning mechanism can be suitable for smaller-sized metal tubes, and its forming is stable and has high forming accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The above and other objects, features and advantages of the present invention will become more apparent through the following description of the embodiments of the present invention with reference to the accompanying drawings.

[0017] Figure 1 A three-dimensional schematic diagram of a spinning mechanism according to an embodiment of the present invention is shown;

[0018] Figure 2 A front view of a spinning mechanism according to an embodiment of the present invention is shown;

[0019] Figure 3 A top view of a spinning mechanism according to an embodiment of the present invention is shown;

[0020] Figure 4 A schematic cross-sectional view of the AA section of the spinning mechanism according to an embodiment of the present invention is shown;

[0021] Figure 5 It shows a partially enlarged schematic diagram of the AA cross-section of the spinning mechanism according to an embodiment of the present invention;

[0022] Figure 6 A schematic cross-sectional view of the cross section BB of the spinning mechanism according to an embodiment of the present invention is shown;

[0023] Figure 7 A right side view of the spinning mechanism according to an embodiment of the present invention is shown;

[0024] Figure 8 A schematic cross-sectional view of the CC section of the spinning mechanism according to an embodiment of the present invention is shown;

[0025] Figure 9a A side view of the second roller in the spinning mechanism according to an embodiment of the present invention is shown;

[0026] Figure 9b A top view of the second roller in the spinning mechanism according to an embodiment of the present invention is shown. DETAILED DESCRIPTION

[0027] The present invention will be described in more detail below with reference to the accompanying drawings. In each of the accompanying drawings, the same elements are represented by similar reference numerals. For the sake of clarity, the various parts in the accompanying drawings are not drawn to scale. In addition, some well-known parts may not be shown.

[0028] It should be understood that when describing the structure of a component, when a layer or a region is referred to as being "on" or "over" another layer or another region, it may mean that it is directly on the other layer or another region, or that other layers or regions are included between it and the other layer or another region. Moreover, if the component is turned over, the layer or a region will be "below" or "beneath" another layer or another region.

[0029] If the purpose is to describe the situation of being directly on another layer or another area, this article will use the expression "directly on..." or "on... and adjacent to...".

[0030] Many specific details of the present invention are described below, such as component structures, materials, dimensions, processing techniques and technologies, in order to more clearly understand the present invention. However, as those skilled in the art will appreciate, the present invention may be implemented without following these specific details.

[0031] The present invention may be embodied in various forms, some examples of which will be described below.

[0032] Figure 1The 3D schematic diagram of the spinning mechanism of the embodiment of the present invention is shown; the spinning mechanism comprises a base 100, a driving shaft 110, a first support arm 200, a first roller 242, a second support arm 300, a second roller 342, an adjustment unit 400 and a holding unit 500; wherein the base 100 is, for example, in a concave shape, and the protruding parts at both ends of the base 100 along the z-axis direction are, for example, provided with through holes penetrating in the horizontal direction (y-axis direction), and the driving shaft 110 passes through the through holes at both ends of the base 100 and is connected to the base 100 through bearings; Between the two ends of the base 100, a first support arm 200 and a second support arm 300 are also provided on the drive shaft 110, wherein the first support arm 200 is located in the left area of ​​the drive shaft 110, and the second support arm 300 is located in the right area of ​​the drive shaft 110. The first support arm 200 is also provided with a first support cylinder 230 for the transmission shaft to pass through, and the second support arm 300 is also provided with a second support cylinder 330 for the transmission shaft to pass through, and an oblique third support cylinder is also provided at the end of the first support arm 200. 250, a fourth support cylinder 350 corresponding to the third support cylinder 250 is disposed at the end of the second support arm 300, a first roller 242 is disposed on one side of the third support cylinder 250, a second roller 342 is disposed on one side of the fourth support cylinder 350, and a projection of the axis of the third support cylinder 250 on the plane where the y-axis and the z-axis are located intersects with a projection of the axis of the fourth support cylinder 350 on the plane where the y-axis and the z-axis are located, so that the first roller 242 intersects with the second roller 342, and the first roller 242 and the second roller The wheels 342 are offset in the x-axis direction to form a gap. The metal tube 600, for example, extends from the left side of the first roller 242 into the gap between the first roller 242 and the second roller 342. As the drive shaft 110 rotates in the direction of the arrow shown in the figure, it drives the first roller 242 to rotate after passing through various transmission components. The drive shaft 110 also drives the second roller 342 to rotate. When the metal tube 600 passes through the gap between the first roller 242 and the second roller 342, it is spun to reduce the diameter of the metal tube 600.

[0033] An adjustment unit 400 is also provided between the first support arm 200 and the second support arm 300. The adjustment unit 400 includes an adjustment block 410, a lead screw 420, and an adjustment wheel 430. The angle between the first support arm 200 and the second support arm 300 can be adjusted by the adjustment unit 400, thereby adjusting the gap between the first roller 242 and the second roller 342, and adjusting the spinning size. The adjustment block 410 includes, for example, two adjustment blocks 410, which are respectively provided on the first support arm 200 and the second support arm 300. The adjustment block 410 is, for example, hinged on the support arm, and the adjustment block 410 can rotate relative to the support arm. Specifically, the adjustment block 410 of the first support arm 200 is located on the side of the first support arm 200 facing the second support arm 300, and the adjustment block 410 of the second support arm 300 is located on the side of the second support arm 300 facing the first support arm 200. The two adjustment blocks 410 are arranged opposite to each other, and the adjustment block 410 on the first support arm 200 has a threaded hole matching the lead screw 420. One end of the lead screw 420 is connected to the adjusting wheel 430, and the other end of the lead screw 420 rotates through the threaded hole on the adjustment block 410 of the first support arm 200 and is hinged to the adjustment block 410 on the second support arm 300. By rotating the adjusting wheel 430, the lead screw 420 can be rotated, and then the adjustment block 410 of the first support arm 200 can be moved along the lead screw 420, so as to adjust the distance between the two adjustment blocks 410, adjust the angle between the first support arm 200 and the second support arm 300, and change the size of the gap between the first roller 242 and the second roller 342.

[0034] Further, in order to avoid the influence of adjusting the spinning size on the feeding position, the spinning mechanism also includes a holding unit 500, and the holding unit 500 can prevent the corresponding feeding axis of the spinning mechanism from being offset when the spinning size is adjusted by the adjustment unit 400. The holding unit 500, for example, includes a first bevel gear ring 510, a second bevel gear ring 520 and a bevel gear 530, wherein the first bevel gear ring 510 is connected to the first support arm 200, and the second bevel gear ring 520 is connected to the second support arm 300. The first bevel gear ring 510 and the second bevel gear ring 520 are, for example, incomplete gear rings (non-360°), and the gear ring ranges thereof meet the requirements of the spinning size adjustment. The bevel gear 530 is hinged to the base 100, and the bevel gear 530 is located between the first bevel gear ring 510 and the second bevel gear ring 520 and meshes with the first bevel gear ring 510 and the second bevel gear ring 520. Through the holding unit 500, when the first support arm 200 rotates, the second support arm 300 will rotate synchronously in the opposite direction, so as to keep the feeding axis of the spinning mechanism always unchanged and in a horizontal state.

[0035] Regarding the driving of the first roller 242 and the second roller 342, the driving of the two rollers is similar, so only the second roller 342 is used as an example for explanation. Specifically, a bevel gear 310 is provided on the right side (y-direction side) of the connecting end of the second support arm 300 and the drive shaft 110, and the bevel gear 310 is connected to the drive shaft 110 and rotates synchronously with the drive shaft 110. A second support cylinder 330 is also provided on the right side of the second support arm 300, and a transmission shaft is provided in the second support cylinder 330. The two ends of the transmission shaft are respectively provided with a bevel gear 321 and a bevel gear 322, and the bevel gear 321 is provided with a bevel gear 322. The gear 321 is meshed with the bevel gear 310; a fourth support cylinder 350 is also provided at the end of the second support arm 300. Similarly, a transmission shaft is also provided in the fourth support cylinder 350. The two ends of the transmission shaft in the fourth support cylinder 350 are respectively provided with a bevel gear 341 and a second roller 342. The bevel gear 341 at one end of the transmission shaft in the fourth support cylinder 350 is meshed with the bevel gear 322 at one end of the transmission shaft in the second support cylinder 330. The drive shaft 110 finally transmits the rotation to the second roller 342 through the meshing of two sets of bevel gears and two transmission shafts.

[0036] Figure 2 The front view of the spinning mechanism according to the embodiment of the present invention is shown; Figure 2 As can be seen in the figure, the first support arm 200 and the second support arm 300 in the spinning mechanism are, for example, axially symmetrically arranged along the dotted line in the figure, and the driving of the first roller 242 is similar to the driving of the second roller 342. Specifically, a bevel gear 210 is arranged on the left side of the connection end of the first support arm 200 and the drive shaft 110.

[0037] The bevel gear 210 is connected to the drive shaft 110 and rotates synchronously with the drive shaft 110. A first support cylinder 230 is also provided on the left side of the first support arm 200. A transmission shaft is provided in the first support cylinder 230. A bevel gear 221 and a bevel gear 222 are provided at both ends of the transmission shaft, and the bevel gear 221 is meshed with the bevel gear 210. A third support cylinder 250 is also provided at the end of the first support arm 200. Similarly, a transmission shaft is also provided in the third support cylinder 250. A bevel gear 241 and a first roller 242 are provided at both ends of the transmission shaft in the third support cylinder 250, respectively. The bevel gear 241 at one end of the transmission shaft in the third support cylinder 250 is meshed with the bevel gear 222 at one end of the transmission shaft in the first support cylinder 230. The drive shaft 110 finally transmits the rotation to the first roller 242 through the meshing of two sets of bevel gears and two transmission shafts. The first roller 242 and the second roller 342 are both compound hyperbolic rollers. The shape of the first roller 242 is the same as that of the second roller 342 , and the center points of the first roller 242 and the second roller 342 overlap in the front view.

[0038] Figure 3FIG. 2 shows a top view of a spinning mechanism according to an embodiment of the present invention; FIG. Figure 3 It can be seen that the first roller 242 and the second roller 342 overlap each other with a gap therebetween. The gap therebetween is the diameter of the metal tube 600 after spinning. The screw 420 is rotated by rotating the adjusting wheel 430, and the size of the gap between the first roller 242 and the second roller 342 is adjusted by adjusting the angle between the first support arm 200 and the second support arm 300.

[0039] Figure 4 and Figure 5 The schematic cross-sectional view of the AA section of the spinning mechanism according to the embodiment of the present invention and its partially enlarged schematic view are shown respectively; Figure 4 As shown, the first roller 242 and the second roller 342 are both hyperbolic rollers, for example. The two rollers rotate in opposite directions to realize the rotation and feeding of the metal tube 600, and the metal tube 600 is gradually reduced in diameter while the axis position remains unchanged. Figure 5 As shown, taking the second roller 342 as an example, the cross section of the end close to the metal tube 600 and first in contact with the metal tube 600 is a curve 3421, and the cross section of the second roller 342 and the section of the metal tube 600 after the diameter reduction is a straight line 3422. The curve 3421 is tangent to the straight line 3422, so that the metal tube 600 can be gradually reduced in diameter, and the axis of the metal tube 600 after the diameter reduction is collinear with the axis of the metal tube 600 before the diameter reduction.

[0040] Figure 6 The cross-sectional schematic diagram of the cross section BB of the spinning mechanism according to the embodiment of the present invention is shown; Figure 6The various parts of the adjustment unit 400 can be shown more clearly. The adjustment unit 400 includes two adjustment blocks 410, a screw 420 connecting the two adjustment blocks 410, and an adjustment wheel 430 connected to the screw 420. The adjustment block 410 also includes a transverse rotating shaft. The adjustment block 410 is inserted into the corresponding connecting hole of the support arm through the transverse rotating shaft, so that the adjustment block 410 can rotate relative to the support arm to which it is connected. Specifically, the first support arm 200 includes two upper and lower connecting holes, and the adjusting block 410 of the first support arm 200 is connected to the upper connecting hole of the first support arm 200, and the adjusting block 410 of the first support arm 200 has a threaded hole matching the lead screw 420; the second support arm 300 also includes two upper and lower connecting holes, and the adjusting block 410 of the second support arm 300 is connected to the lower connecting hole of the second support arm 300, and the adjusting block 410 of the second support arm 300 is hinged to the lower end of the lead screw 420, and the lead screw 420 is driven to rotate by rotating the adjusting wheel 430. The adjusting block 410 of the first support arm 200 moves along the lead screw 420 under the drive of the lead screw 420, so that the distance between the adjusting block 410 of the first support arm 200 and the adjusting block 410 of the second support arm 300 changes, thereby changing the angle between the first support arm 200 and the second support arm 300, and changing the gap between the two rollers at the ends of the two support arms, so as to achieve the adjustment of the spinning size.

[0041] Figure 7 The right side view of the spinning mechanism of the embodiment of the present invention is shown; the first support arm 200 and the second support arm 300 of the spinning mechanism are V-shaped in the right side view, and the size of the gap between the first roller 242 and the second roller 342 can be adjusted by adjusting the angle between the two support arms, thereby adjusting the spinning size.

[0042] Figure 8 Shown along Figure 7 Schematic diagram of the cross section taken along the CC section line; Figure 8 As can be seen from the figure, the base 100 is provided with a columnar protrusion 101 at the middle position on the side facing the drive shaft 110, and the bevel gear 530 is sleeved on the columnar protrusion 101, and the bevel gear 530 can rotate along the columnar protrusion 101. The second support cylinder 330 has a transmission shaft 323, and the fourth support cylinder 350 has a transmission shaft 343. Figure 8 The transmission path from the drive shaft 110 to the second roller 342 can be clearly seen. Specifically, the drive shaft 110 drives the bevel gear 310 to rotate, the bevel gear 310 drives the bevel gear 321 to rotate, the bevel gear 321 drives the transmission shaft 323 to rotate, the transmission shaft 323 drives the bevel gear 322 to rotate, the bevel gear 322 drives the bevel gear 341 to rotate, the bevel gear 341 drives the transmission shaft 343 to rotate, and the transmission shaft 343 drives the second roller 342 to rotate.

[0043] The two ends of the driving shaft 110 are connected to the base 100 through bearings, the first support arm 200 and the second support arm 300 are also connected to the driving shaft 110 through bearings, the transmission shaft 323 is connected to the second support cylinder 330 through bearings at both ends of the second support cylinder 330, and the transmission shaft 343 is connected to the fourth support cylinder 350 through needle bearings at both ends of the fourth support cylinder 350. Further, by adjusting the gear ratio between the bevel gears, the ratio of the rotation speed of the driving shaft 110 to the rotation speed of the second roller 342 is adjusted.

[0044] Figure 9a and Figure 9b 1 and 10 respectively show a side view and a top view of the second roller in the spinning mechanism of the embodiment of the present invention; the first roller 242 and the second roller 342 have the same size and shape, so only the second roller 342 is described in detail. Figure 5 Taking the cross section along the axis of the metal tube 600 as an example, three specific points 1, 2 and 3 in the second roller 342 are selected and a coordinate system is established to illustrate the hyperbolic roller. Figure 9b Point 1', point 2', and point 3' in the figure are projections of point 1, point 2, and point 3 in the top view respectively; Figure 9a It can be seen that the second roller 342 is a composite hyperbolic roller, including a first hyperbolic surface 21 located in the upper part and a second hyperbolic surface 22 located in the lower part. The first hyperbolic surface 21 in the upper part is different from the second hyperbolic surface 22 in the lower part. The two hyperbolic surfaces are connected in the middle position, and point 1, point 2 and point 3 are not collinear, that is, the generatrixes of the two hyperbolic surfaces are not collinear.

[0045] Specifically, the radius of the second roller 342 at point 3 is Ru, the point 2 corresponds to the minimum radius, the radius of the horizontal plane (parallel to the v-axis) where point 2 is located is Rm, the radius of point 1 is Rd, the height of the second roller 342 is, for example, H, the first hyperboloid 21 and the second hyperboloid 22 of the second roller 342 are, for example, non-developable ruled surfaces, the first hyperboloid 21 is, for example, formed by rotating the line from point 3 to point 2 (the straight line in the purple part of the figure) around the w-axis, and the second hyperboloid 22 is, for example, formed by rotating the line from point 2 to point 1 (the straight line in the green part of the figure) around the w-axis. Figure 9a In the view of , the axis of the metal tube 600 should coincide with the line connecting point 2 to point 1. For example, the metal tube 600 is fed to the second roller 342 from the side of point 3. During spinning, the axis of the metal tube 600 and the direction of the line connecting point 3 to point 2 have an angle, which is used to form a transition section from thick to thin diameter of the metal tube 600 during the shrinking process; in the area of ​​the second hyperboloid 22, during spinning, the axis of the metal tube 600 is consistent with the direction of the line connecting point 2 to point 1, and Figure 5After one end of the metal tube 600 enters the spinning mechanism, automatic feeding can be achieved under the joint action of the first roller 242 and the second roller 342.

[0046] Combination Figure 9a and Figure 9b As shown, the coordinates of each point can be obtained. Specifically, point 1' and point 3' are connected to the intersection of the v-axis and the u-axis as auxiliary lines, and the coordinates of each point can be obtained. Point 1 (Rm, (Rd*Rd-Rm*Rm) 0.5 , -H / 2); point 2 (Rm, 0, 0); point 3 (Rm, (Ru*Ru-Rm*Rm) 0.5 , H / 2). In one embodiment, Rm is, for example, 47 mm, Rd is, for example, 60 mm, Ru is, for example, 50 mm, and H is, for example, 80 mm.

[0047] from Figure 9a and Figure 9b It can be seen that the spinning mechanism in the present application uses two identical composite hyperbolic rollers to spin the tube. The two hyperbolic surfaces are non-developable straight-grained hyperbolic surfaces, and there is an angle between their corresponding generatrixes, so that the axis of the metal tube is consistent with the generatrix direction of one of its hyperbolic surfaces, and the generatrix of the other hyperbolic surface forms an angle with the axis of the metal tube, so that the hyperbolic surface is used to spin the metal tube to form a transition section.

[0048] Furthermore, although the above embodiment only shows a spinning mechanism using double support arms and transmitting through two transmission shafts, a single support arm can also be used, and the other roller only rotates, and its rotation axis is fixed. Although its feed axis needs to be changed, it can also realize spinning processing. Of course, the transmission stages, bevel gears, bearings, transmission shafts, etc. in the spinning mechanism can be adjusted according to needs.

[0049] The advantages and beneficial effects of the present invention are as follows: the present invention provides a spinning mechanism, which has a simple and reliable structure, can be continuously fed, has high production efficiency, a high degree of automation and good product consistency, and spins the metal tube by two composite hyperbolic rollers so that its tube diameter can be reduced, significantly reducing defects such as cracking and bending in the tube shrinking process, and improving the product yield. Furthermore, the spinning mechanism can also adjust the tube diameter size after spinning through an adjustment unit, and the adjustment will not affect the feed axis. The spinning mechanism can be suitable for smaller-sized metal tubes, and its forming is stable and has high forming accuracy.

[0050] In the above description, the technical details such as the composition and processing method of each component are not described in detail. However, those skilled in the art should understand that various technical means can be used to form cavities and holes of desired shapes. In addition, although the components and the expansion deformations are described separately above, this does not mean that the expansion deformations in various embodiments cannot be used in combination to advantage.

[0051] The embodiments of the present invention are described above. However, these embodiments are only for illustrative purposes and are not intended to limit the scope of the present invention. The scope of the present invention is defined by the appended claims and their equivalents. Without departing from the scope of the present invention, those skilled in the art may make various substitutions and modifications, which should all fall within the scope of the present invention.

Claims

1. A spinning mechanism, characterized in that: include: Pedestal; A drive shaft, located on the base; A first supporting arm, one end of which is hinged to the driving shaft, and the other end of which is provided with a first roller; a second supporting arm, one end of the second supporting arm being hinged to the driving shaft, and the other end of the second supporting arm being provided with a second roller; The second support arm corresponds to the first support arm, the first roller and the second roller are arranged crosswise, and a transmission structure is arranged on the drive shaft, the first support arm and the second support arm, so that the drive shaft drives the first roller and the second roller to rotate, there is a gap between the first roller and the second roller, the rotation direction of the first roller is opposite to the rotation direction of the second roller, and the first roller and the second roller are both compound hyperbolic rollers; The spinning mechanism further includes an adjustment unit, which adjusts the angle between the first support arm and the second support arm to change the size of the gap between the first roller and the second roller, and the adjustment unit includes: Two adjustment blocks, the two adjustment blocks are hinged to the first support arm and the second support arm respectively; A lead screw connecting the two adjustment blocks; Wherein, at least one of the two adjustment blocks is provided with a threaded hole matching the lead screw, and the distance between the two adjustment blocks can be adjusted by rotating the lead screw, thereby changing the angle between the first support arm and the second support arm; The spinning mechanism further includes a holding unit, and when the angle between the first support arm and the second support arm changes, the holding unit causes the first support arm and the second support arm to rotate synchronously in opposite directions to avoid deviation of the feed axis; The holding unit comprises: A first conical gear ring, located at one end of the first support arm and connected to the first support arm, the first conical gear ring is arranged around the drive shaft, and the first conical gear ring faces one side of the second support arm; A second conical gear ring, located at one end of the second support arm and connected to the second support arm, the second conical gear ring is arranged around the drive shaft, and the second conical gear ring faces one side of the first support arm; A bevel gear is hinged to the base, the bevel gear is located between the first bevel gear ring and the second bevel gear ring, and is meshed with the first bevel gear ring and the second bevel gear ring respectively; The first bevel gear ring is connected to the second bevel gear ring through the bevel gear, so that the first bevel gear ring and the second bevel gear ring rotate synchronously in opposite directions.

2. The spinning mechanism according to claim 1, characterized in that: The driving shaft drives the first roller to rotate through a secondary transmission.

3. The spinning mechanism according to claim 2, characterized in that: A first support tube is arranged on the side of the first support arm, a transmission shaft is arranged in the first support tube, an inclined third support tube is arranged at the other end of the first support arm, a transmission shaft is also arranged in the third support tube, and one end of the transmission shaft is connected to the first roller.

4. The spinning mechanism according to claim 3, characterized in that: The driving shaft drives the second roller to rotate through a secondary transmission.

5. The spinning mechanism according to claim 4, characterized in that: A second support cylinder is arranged on the side of the second support arm, a transmission shaft is arranged in the second support cylinder, an inclined fourth support cylinder is arranged at the other end of the second support arm, the fourth support cylinder corresponds to the third support cylinder, a transmission shaft is also arranged in the fourth support cylinder, and one end of the transmission shaft is connected to the second roller, and the second roller intersects with the first roller.

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