High speed twisting frame bed adapted to spheroidal graphite cast iron main shaft bearing bed

Abstract

The application relates to a high-speed stranding machine seat suitable for a nodular cast iron main shaft bearing seat, and belongs to the technical field of high-speed stranding machines. The high-speed stranding machine seat comprises a machine table seat, a main shaft, bearings and locking assemblies, the bearings and the locking assemblies are arranged at the two ends of the main shaft, and the bearings are respectively arranged on the two sides of the machine table seat. The locking assembly comprises a locking ring, an expansion piece, two clamping seats and bolt pieces arranged on the clamping seats. The locking ring is slidably connected in the clamping seat, and a deformable bending part is arranged on one side of the clamping seat. The expansion piece comprises a pressing ring and a threaded strip, the pressing ring is fixed to the locking ring, and the threaded strip is fixed to the outside of the locking ring. The clamping seat is provided with a movable groove and a ring groove, the locking ring is slidably connected with the movable groove, and the threaded strip is located in the ring groove. The rotation of the locking ring drives the axial displacement of the pressing ring and the threaded strip, and the pressing ring extrudes and deforms the bending part to be tightly contracted. The dismounting structure can adapt to frequent change and maintenance requirements, and can guarantee the rotation accuracy of the main shaft and the running stability of the whole machine.

Description

Technical Field

[0001] This invention belongs to the field of high-speed stranding machine technology, specifically relating to a high-speed stranding machine base adapted to a ductile iron spindle bearing housing. Background Technology

[0002] Stranding machines are core equipment in the cable manufacturing industry. The locking reliability, centering accuracy, and operational stability of their spindle seats directly determine the stranding quality and equipment efficiency. In the research and development and production of high-frequency, high-speed stranding equipment (such as untwisting stranding machines), the stability and maintainability of the spindle assembly are key challenges. The spindle of such equipment typically integrates an untwisting stranding component. This asymmetrical structure causes significant centrifugal force due to the shift in the center of gravity during high-speed rotation, leading to continuous radial vibration. This vibration not only reduces the uniformity and quality of cable stranding but also subjects bearings and other supporting components to additional alternating stress, accelerating fatigue failure and severely limiting the high-speed performance and long-term operational reliability of the equipment.

[0003] Currently, mainstream stranding machine spindle seats generally adopt a low-cost but quick-disassembly mechanical locking structure. A typical mechanical locking structure is the locking method of "arc-shaped cover (or arc-shaped piece) in combination with multiple circumferential bolts". However, there are also obvious shortcomings: First, the preload mainly depends on manual experience, which is difficult to control and maintain accurately; second, the bolts are very prone to loosening under long-term high-frequency vibration, and the locking force decay is uncontrollable, which cannot provide continuous and stable rigid support, and thus cannot effectively suppress the eccentric runout of the spindle.

[0004] However, the solution still has inherent structural flaws: its integral ring structure requires the spindle and bearing housing to be pulled out or installed axially from the machine base during equipment maintenance, process adjustments, or replacement of stranded wire assemblies of different specifications. The expansion coupling sleeve, as a single component, must be completely disassembled or installed accordingly. This process is not only cumbersome and time-consuming, but each disassembly and reassembly can also lead to misalignment, compromising its original high-precision locking state.

[0005] Therefore, the above-mentioned methods are difficult to reconcile with the dual requirements of precision locking and rapid maintenance, and there is an urgent need for a new type of base structure that can take into account both rapid disassembly and assembly and convenient maintenance. Summary of the Invention

[0006] To address the aforementioned problems in the existing technology, this invention provides a high-speed stranding machine base adapted to a ductile iron spindle bearing housing. Through a quick and convenient openable structure, it supports unobstructed and rapid disassembly and assembly of the spindle in the vertical direction to meet frequent model changes and maintenance needs, and ensures the spindle's rotational accuracy and the overall machine's stable operation.

[0007] The objective of this invention can be achieved through the following technical solutions: A high-speed stranding machine base adapted to a ductile iron spindle bearing housing includes a machine base, a spindle, bearings, and a locking assembly. The bearings and locking assembly are located at both ends of the spindle, with the bearings mounted on both sides of the machine base. The locking assembly includes a locking ring, an expansion member, two retaining seats, and bolts mounted on the retaining seats. The locking ring is slidably connected within the retaining seats, and one side of the retaining seat has a deformable bending portion. The expansion member includes a compression ring and a threaded strip; the compression ring is fixed to the locking ring, and the threaded strip is fixed to the outside of the locking ring. The retaining seats have a movable groove and an annular groove; the locking ring is slidably connected to the movable groove, and the threaded strip is located within the annular groove. Rotating the locking ring causes the compression ring and the threaded strip to move axially, and the compression ring compresses and tightens the bending portion.

[0008] As a further embodiment of the present invention, the bending part is an annular structure that cooperates with the inclined structure of the extrusion ring. The bending part is made of deformable low carbon steel, specifically 20# steel. The axial extrusion of the extrusion ring causes the bending part to converge inward and clamp the bearing.

[0009] As a further embodiment of the present invention, both of the card holders are semi-circular, and when fastened together, they form an annular structure covering the outer ring of the bearing. One card holder is fixedly connected to the machine base, and the other card holder can be opened and closed to realize the vertical removal and installation of the spindle.

[0010] As a further embodiment of the present invention, the bolt component includes a double-ended bolt and a nut. Both ends of the two card seats are provided with coaxial holes for the double-ended bolt to pass through. The two sets of double-ended bolts and nuts respectively lock the two card seats and reinforce the connection of the machine base.

[0011] As a further embodiment of the present invention, the locking ring has an arc-shaped structure, and the two locking rings are respectively disposed in the movable grooves of the two card seats. The threaded strip and the ring groove are slidably engaged, so that the locking ring can rotate and move along the axial direction of the card seat.

[0012] As a further embodiment of the present invention, the controllable drive includes an input pipe and a solenoid valve, wherein the input pipe is connected to an external oil pump and the hydraulic chamber, and the solenoid valve is located on the input pipe.

[0013] As a further embodiment of the present invention, when the locking ring is not rotated, the two card seats symmetrically form annular hoops; after the locking ring rotates by a preset angle, the arc-shaped locking ring is located between the joints of the two card seats, restricting the card seats from opening.

[0014] As a further embodiment of the present invention, the locking components are symmetrically arranged on both sides of the machine base, and both locking components can independently achieve bearing locking and vertical disassembly and assembly of the spindle.

[0015] As a further embodiment of the present invention, the compression ring and the locking ring are fixed together, and rotate synchronously with the locking ring and move axially to continuously compress the bent part to adjust the clamping force.

[0016] As a further aspect of the present invention, the annular groove is formed inside the movable groove, and the threaded strip is confined within the annular groove to prevent the locking ring from dislodging radially from the retaining seat. The beneficial effects of this invention are as follows: The composite locking structure, which combines two locking seats with an expansion component, enables rapid vertical assembly and disassembly of the main shaft bearing housing. At the same time, the variable locking of the bending part provides controllable locking force to the main shaft. This ensures the uniformity and reliability of the locking state in real time, thus solving the problem of balancing maintenance convenience and operational stability in stranding machines during long-term high-speed operation. Attached Figure Description

[0017] To facilitate understanding by those skilled in the art, the present invention will be further described below with reference to the accompanying drawings.

[0018] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a partial three-dimensional structural diagram of the present invention; Figure 3 This is a schematic diagram of the locking state of the card holder in this invention; Figure 4 This is a schematic diagram of the card holder in the open state of the present invention; Figure 5 This is a partial cross-sectional three-dimensional structural schematic diagram of the present invention; Figure 6 For the present invention Figure 5 A magnified three-dimensional structural diagram of A in the middle; Legend: 1. Machine base; 2. Main shaft; 3. Bearing; 5. Clamping seat; 503. Double-ended bolt; 504. Nut; 51. Bending part; 6. Locking ring; 61. Spiral; 62. Extrusion ring. Detailed Implementation

[0019] To further illustrate the technical means and effects of the present invention in achieving its intended purpose, the following detailed description of the specific implementation methods, structures, features, and effects of the present invention, in conjunction with the accompanying drawings and preferred embodiments, is provided.

[0020] refer to Figures 1-6As shown, this invention discloses a high-speed stranding machine base adapted to a ductile iron spindle bearing housing, comprising a spindle 2, bearings 3, a machine base 1, and a locking assembly. The locking assembly and bearings 3 are located at both ends of the spindle 2, with the bearings 3 respectively placed on both sides of the machine base 1. The locking assembly includes a locking ring 6, an expansion member, two retaining seats 5, and bolts disposed on the retaining seats 5. One retaining seat 5 is fixed to the machine base 1, and the other retaining seat 5 is annularly clamped to the bearing 3 and detachably fastened by bolts. The locking ring 6 is slidably connected within the retaining seat 5, and one side of the retaining seat 5 has a deformable bending portion 51. The expansion member includes a compression ring 62 and a threaded strip 61. The compression ring 62 is fixed to the locking ring 6. One end of each retaining seat 5 has a groove, and the threaded strip 61 is fixed to the outside of the locking ring 6. One side of each retaining seat 5 has a movable groove, and the locking ring 6 is slidably connected to the movable groove. An annular groove is formed inside the movable groove, and the threaded strip 61 is located inside the annular groove.

[0021] With the above configuration, when the spindle 2 and bearing 3 are placed on the machine base 1, the bearing 3 can support the spindle 2 and maintain its rotation. The bearing 3 is secured by two clamps 5 using bolts, allowing the spindle 2 to be vertically removed for replacement and also locking the bearing 3 in place when the spindle 2 needs to rotate. Furthermore, a locking ring 6 slidingly within the clamp 5 locks the clamp 5, which forms a ring-like clamp through hinged opening and closing. The clamp 5 has a deformable bending portion 51 on the side near the compression ring 62. The ring structure and the extrusion ring 62 cooperate with each other, and the extrusion ring 62 slides on the locking ring 6. The extrusion ring 62 is rotated and the bending part 51 is deformed and tightened as the threaded bar 61 is axially displaced. Specifically, in order to make the bending part 51 bend tightly, the bending part 51 is made of deformable low carbon steel and connected to the card seat 5, specifically 20# steel. Therefore, the bending part 51 is deformed and converged inward by the inclined structure of the extrusion ring 62, so as to clamp the bearing 3 more stably. The clamping force of the bending part 51 on the bearing 3 can also be adjusted at any time.

[0022] To facilitate the vertical removal of the spindle 2 for replacement or maintenance, locking components are provided on both sides of the machine base 1. Specifically, there are two clamping seats 5 and two locking rings 6. The two clamping seats 5 are semi-circular. One clamping seat 5 is fixed to the machine base 1, and the other clamping seat 5 is fastened to the bearing 3 through a snap-fit ​​mechanism. Two sets of locking structures formed by double-ended bolts 503 and nuts 504 lock the two clamping seats 5 respectively, forming a ring structure to fix the bearing 3 and further stabilize the machine base 1 and the double-ended bolts 503. Specifically, coaxial holes are formed between the two ends of the two clamping seats 5 for the double-ended bolts 503 to pass through. One bolt head contacts the side of the machine base 1, and the other bolt head is fixed to the side of the machine base 1. The two nuts 504 are in contact with the first bolt head and lock the machine base 1 and the second bolt head respectively. The two clasps 5 form an annular structure to cover the outer ring of the bearing 3. In addition, the two locking rings 6 are arc-shaped and are located in the movable grooves opened on one side of the two clasps 5. The threaded strip 61 slides with the annular groove of the clasps 5, so that the locking rings 6 can rotate and move axially along the annular groove of the clasps 5. More specifically, when the locking rings 6 are not axially rotated, the two clasps 5 form annular hoops symmetrically on the top and bottom. The locking rings 6 on the clasps 5 are also symmetrically arranged on the top and bottom. When the locking rings 6 are axially rotated by a certain angle, the arc-shaped structure of the locking rings 6 is located between the joints of the two clasps 5, so that the clasps 5 cannot be opened again.

[0023] The above settings facilitate quick vertical disassembly and replacement of the spindle, allow for rapid locking and installation of the spindle, and maintain a certain level of stability. Compared to the existing shrink-fit coupling sleeve, although the existing technology can clamp in a ring-like manner and maintain sufficient stability to cope with the swaying centrifugal force caused by gravity deviation combined with high-speed rotation, it is difficult to accommodate situations where the spindle 2 needs to be removed vertically for quick disassembly and assembly. Even if the shrink-fit coupling sleeve is fitted onto the spindle 2, the entire shrink-fit coupling sleeve must be removed and installed, and the entire disassembly and assembly process is both cumbersome and requires maintaining sufficient installation accuracy.

[0024] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention are within the scope of the present invention.

Claims

1. A high-speed stranding machine base adapted to a ductile iron spindle bearing housing, characterized in that, The system includes a machine base, a spindle, bearings, and a locking assembly. The bearings and locking assembly are located at both ends of the spindle, with the bearings mounted on both sides of the machine base. The locking assembly includes a locking ring, an expansion member, two retaining seats, and bolts mounted on the retaining seats. The locking ring is slidably connected within the retaining seats, and one side of the retaining seat has a deformable bending section. The expansion member includes a compression ring and a threaded strip. The compression ring is fixed to the locking ring, and the threaded strip is fixed to the outside of the locking ring. The retaining seats have a movable groove and an annular groove. The locking ring is slidably connected to the movable groove, and the threaded strip is located within the annular groove. Rotating the locking ring causes the compression ring and threaded strip to move axially, and the compression ring compresses and tightens the bending section.

2. The high-speed stranding machine base adapted to the ductile iron spindle bearing housing according to claim 1, characterized in that: The bending part is a ring structure that cooperates with the inclined structure of the extrusion ring. The bending part is made of deformable low carbon steel, specifically 20# steel. The axial extrusion of the extrusion ring causes the bending part to converge inward and clamp the bearing.

3. The high-speed stranding machine base adapted to the ductile iron spindle bearing housing according to claim 2, characterized in that: Both of the aforementioned clamps are semi-circular, and when fastened together, they form an annular structure that covers the outer ring of the bearing. One clamp is fixedly connected to the machine base, while the other clamp can be opened and closed to allow the spindle to be vertically removed and installed.

4. The high-speed stranding machine base adapted to the ductile iron spindle bearing housing according to claim 3, characterized in that: The bolt components include double-ended bolts and nuts. Both ends of the two clamps are provided with coaxial holes for the double-ended bolts to pass through. The two sets of double-ended bolts and nuts respectively lock the two clamps and reinforce the connection of the machine base.

5. The high-speed stranding machine base adapted to the ductile iron spindle bearing housing according to claim 4, characterized in that: The locking ring has an arc-shaped structure, with two locking rings respectively located in the movable grooves of the two card seats. The threaded strip slides into the ring groove, allowing the locking ring to rotate and move along the axial direction of the card seat.

6. The high-speed stranding machine base adapted to the ductile iron spindle bearing housing according to claim 5, characterized in that: When the locking ring is not rotated, the two card seats symmetrically form annular hoops; after the locking ring rotates at a preset angle, the arc-shaped locking ring is located between the joints of the two card seats, restricting the card seats from opening.

7. The high-speed stranding machine base adapted to the ductile iron spindle bearing housing according to claim 6, characterized in that: The locking components are symmetrically arranged on both sides of the machine base, and each locking component on both sides can independently achieve bearing locking and vertical disassembly and assembly of the spindle.

8. The high-speed stranding machine base adapted to the ductile iron spindle bearing housing according to claim 7, characterized in that: The compression ring and the locking ring are fixed together, and rotate synchronously with the locking ring and move axially to continuously compress the bent part to adjust the clamping force.

9. The high-speed stranding machine base adapted to the ductile iron spindle bearing housing according to claim 1, characterized in that: The annular groove is formed inside the movable groove, and the threaded strip is confined within the annular groove to prevent the locking ring from dislodging radially from the retainer.

Images