Hollow spinning and twisting spindle
By introducing upper and lower vibration-absorbing bearings and a brake assembly into the hollow spinning spindle, the problems of spindle deformation and yarn breakage stoppage were solved, achieving stable spinning and efficient production.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- CHANGZHOU PEIXING TEXTILE MASCH MFG CO LTD
- Filing Date
- 2025-05-20
- Publication Date
- 2026-04-24
AI Technical Summary
Existing hollow spinning spindles suffer from large spindle deformation during high-speed operation, affecting spinning quality and bobbin verticality. Furthermore, the lack of a spindle braking mechanism necessitates machine shutdown in case of yarn breakage, impacting production efficiency.
The spindle holder is equipped with upper and lower vibration-absorbing bearings and a spindle braking assembly. The upper and lower vibration-absorbing bearings improve the stress state of the spindle rod and reduce the amplitude, while the spindle braking assembly enables manual braking to avoid machine shutdown.
It improves the stability of the spindle and the quality of spinning, reduces the amplitude, ensures the smoothness of high-speed operation, and can quickly brake without stopping the machine in case of yarn breakage, thus improving production efficiency.
Smart Images
Figure CN224160765U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to a hollow spinning spindle, belonging to the field of hollow spindle spinning technology. Background Technology
[0002] Hollow spindle spinning, also known as parallel spinning or wrapped spinning, utilizes a hollow spindle to wrap an untwisted core with outer fibers to form yarn. In this process, the hollow spindle plays a crucial role, enabling the outer fibers to wind around the core in a specific manner, forming wrapped yarn with a particular structure and properties to meet the needs of different products.
[0003] Existing hollow spinning spindles mainly consist of a hollow spindle rod, a spindle disc, and a spindle base. The spindle disc is connected to the spindle rod and positioned on top of the spindle base. A lower positioning sleeve is held in place by a spring on the spindle disc. The spindle base is connected to the spindle rod via two bearings, and is mounted on a reinforcing plate via a spindle base nut. The spindle belt drives the spindle disc, which in turn drives the spindle rod to rotate, thus achieving yarn twisting and winding. In this type of hollow spinning spindle, the spindle base is located below the spindle disc, and the two bearings supporting the spindle rod are mounted on the spindle base, both located below the spindle disc. The spindle disc not only bears the radial force of the drive belt but also a certain axial force. The spindle rod undergoes significant deflection under stress, which increases the spindle amplitude after a period of high-speed operation, affecting the verticality of the bobbin and causing a decrease in yarn quality. Furthermore, due to the machine's limitations, hollow spinning spindles lack a braking mechanism. When a yarn breakage occurs, the machine must be stopped for reconnection, further impacting production efficiency. Summary of the Invention
[0004] The purpose of this invention is to provide a hollow spinning spindle with a reasonable and compact structure that can improve the stability of the spindle, maintain the spinning quality, and facilitate yarn breakage.
[0005] The technical solution of this utility model to achieve the above-mentioned objective is: a hollow spinning spindle, characterized in that it includes a spindle seat, a spindle plate, a spindle rod, a bobbin positioning assembly, and a spindle braking assembly;
[0006] The ingot holder is cylindrical, including an upper bearing seat at the top, a lower bearing seat in the middle and lower part, and a small shaft section connecting part at the lower part of the lower bearing seat. The ingot holder has a first groove between the upper bearing seat and the lower bearing seat and a second groove at the lower part of the reverse first groove. A hollow ingot rod is pressed into the tapered hole of the ingot disc and fixedly connected to the ingot disc. An upper vibration-absorbing bearing is installed between the ingot and the upper bearing seat of the ingot holder, and a lower vibration-absorbing bearing is installed between the ingot rod and the lower bearing seat of the ingot holder. The ingot disc is set inside the ingot holder. The top surface of the ingot disc is spaced from the upper vibration-absorbing bearing, and the bottom surface of the ingot disc is connected to the lower vibration-absorbing bearing through an adjusting shim. The first groove on the ingot holder is used for the ingot strip to extend into the ingot holder and connect with the ingot disc, and the second groove is used for the ingot block to extend into the ingot holder and face the ingot disc.
[0007] The tube positioning assembly includes an upper positioning sleeve and a lower positioning sleeve. The upper positioning sleeve is mounted on the upper part of the spindle rod, and at least two pins are mounted on the upper positioning sleeve and set in the guide grooves corresponding to the spindle rod. The upper positioning sleeve is provided with an upper conical surface that connects to the top of the tube. The lower positioning sleeve is mounted on the middle part of the spindle rod, and a spring is provided inside the lower positioning sleeve. One end of the spring rests on the end face of the spring hole of the lower positioning sleeve, and the other end rests on the lower vibration-absorbing bearing. The lower positioning sleeve is provided with a lower conical surface that connects to the bottom of the tube.
[0008] The brake assembly includes a brake support, a brake block, and a wrench. The brake support is mounted on the brake base and located at the lower part of the second slot. The wrench and the brake block are mounted on the brake support via a connecting shaft. The eccentric wheel at the lower part of the wrench is connected to the brake block and drives the brake block to move. The brake block presses against the brake disc on its braking surface to brake the brake disc. The brake block releases the brake on the brake disc when its braking surface disengages from the brake disc.
[0009] This utility model relates to a hollow spinning spindle. The spindle rod is mounted on a spindle base via upper and lower vibration-absorbing bearings. The spindle disc, connected to the spindle rod, is located inside the spindle base. The upper and lower vibration-absorbing bearings supporting the spindle rod are located on the upper and lower sides of the spindle disc, thus improving the stress state of the spindle rod, reducing the flexural deformation caused by stress, and enhancing the stability of the spindle rod. This ensures smooth operation during high-speed spindle operation, maintains yarn quality, and extends the overall service life of the spindle. This utility model also features a spindle braking assembly installed on the spindle base. By operating a wrench, the eccentric wheel at the lower part of the wrench drives the brake block to move, thereby braking and releasing the spindle disc. The structure is compact, and it only brakes and reconnects broken spindles. Operation is convenient and quick, requiring no machine downtime, and improving production efficiency. Attached Figure Description
[0010] The embodiments of this utility model will now be described in further detail with reference to the accompanying drawings.
[0011] Figure 1 This is a schematic diagram of the structure of the hollow spinning spindle of this utility model.
[0012] Figure 2 yes Figure 1 A schematic diagram of the structure along direction A.
[0013] Figure 3 This is a schematic diagram of the hollow spinning spindle of this utility model.
[0014] Figure 4 This is a schematic diagram of the structure of the spindle mounting plate of this utility model.
[0015] Figure 5 This is a schematic diagram of the structure of the ingot holder of this utility model.
[0016] Figure 6yes Figure 5 A schematic diagram of the B-direction structure.
[0017] Figure 7 This is a structural schematic diagram of the wrench of this utility model.
[0018] Figure 8 This is a schematic diagram of the sealing cap of this utility model.
[0019] Wherein: 1—Upper positioning sleeve, 2—Spindle rod, 3—Lower positioning sleeve, 4—Dust cover, 4-1—Spring sleeve, 4-2—Cover plate, 4-21—Plug-in, 4-22—Insertion hole, 4-3—Spindle tube sleeve, 4-31—Clamping foot, 5—Spindle seat, 5-1—Upper bearing seat, 5-11—Upper limit groove, 5-12—Clamping slot, 5-2—First groove, 5-3—Lower bearing seat, 5-31—Lower limit groove, 5-32—Limit groove, 5-33—Mounting groove, 5-4—Second groove, 5-5—Connecting part, 6—Brake block, 7—Connecting shaft, 8—Wrench, 8- 1—Eccentric wheel, 8-2—Shaft hole, 9—Upper vibration damping support, 9-1—Protruding limiting block, 10—Spindle disc, 11—Brake pin support, 11-1—Support part, 11-2—Brake block guide groove, 12—Lower vibration damping support, 13—Spindle seat nut, 14—Wire guide seat, 15—Sleeve retainer, 16—Spring, 17—Upper bearing retainer, 18—Upper vibration damping ring, 18-1—Upper positioning protrusion, 19—Upper bearing, 20—T-sleeve, 21—Adjusting shim, 22—Lower bearing, 23—Lower vibration damping ring, 23-1—Lower positioning protrusion, 24—Lower bearing retainer. Detailed Implementation
[0020] See Figures 1-4 As shown, a hollow spinning spindle of this utility model includes a spindle base 5, a spindle disc 10, a spindle rod 2, a bobbin positioning assembly, and a spindle braking assembly.
[0021] See Figures 1-3 As shown in Figures 4 and 5, the spindle seat 5 of this utility model is cylindrical, including an upper bearing seat 5-1 at the top, a lower bearing seat 5-3 in the middle and lower part, and a small shaft section connecting part 5-5 at the lower part of the lower bearing seat 5-3. The spindle seat 5 has a first groove 5-2 between the upper bearing seat 5-1 and the lower bearing seat 5-3 and a second groove 5-4 at the lower part of the reverse first groove 5-2. The hollow spindle rod 2 is pressed into the tapered hole of the spindle plate 10 and fixedly connected to the spindle plate 10. The spindle belt is installed on the spindle plate 10, and the spindle plate 10 and the spindle rod 2 drive the spindle to rotate, and the bobbin installed on the spindle rod 2 twists and winds the yarn.
[0022] See Figures 3-7As shown, the upper vibration-absorbing bearing of this invention is installed between the upper bearing seat 5-1 of the spindle rod 2 and the spindle base 5, and the lower vibration-absorbing bearing is installed between the lower bearing seat 5-3 of the spindle rod 2 and the spindle base 5. The upper and lower vibration-absorbing bearings secure the spindle rod 2 to the spindle base 5, reducing the amplitude of vibration after the spindle is loaded during high-speed operation, thus ensuring spinning quality. See Figures 1-4 As shown, the ingot disc 10 of this utility model is disposed inside the ingot base 5. The top surface of the ingot disc 10 is spaced from the upper vibration-absorbing bearing, and the bottom surface of the ingot disc 10 is connected to the lower vibration-absorbing bearing via an adjusting shim 21. Therefore, the axial position of the ingot rod 2 can be easily adjusted. See Figures 1-3 As shown in 5 and 6, the first slot 5-2 on the spindle seat 5 of this utility model is used for the spindle belt to extend into the spindle seat 5 and connect with the spindle disk 10, and the second slot 5-4 is used for the spindle block 6 to extend into the spindle seat 5 and be opposite to the spindle disk 10. In this utility model, the spindle disk 10 is set inside the spindle seat 5, and the upper and lower vibration-absorbing bearings supporting the spindle rod 2 are set at the upper and lower parts of the spindle disk 10. When the spindle belt transmits the driving force to the spindle disk 10, it can improve the stress state of the spindle rod 2. When running at high speed, it reduces the amplitude of the spindle and improves the spinning quality.
[0023] See Figures 1-6 As shown, to facilitate assembly and subsequent maintenance of the spindle, the upper vibration-absorbing bearing includes an upper vibration-absorbing ring 18, an upper bearing 19, and two upper bearing retaining rings 17. The upper vibration-absorbing ring 18 covers the outer circumference and upper and lower parts of the outer ring of the upper bearing 19. The upper vibration-absorbing ring 18 is mounted on the upper bearing seat 5-1. The two upper bearing retaining rings 17 with inner convex rings are respectively disposed on both sides of the upper bearing 19 and connected to the inner ring of the upper bearing 19. The retaining ring for the hole mounted on the spindle seat 5 is connected to the upper vibration-absorbing ring 18. The retaining ring for the upper shaft mounted on the spindle rod 2 is connected to the upper bearing retaining ring 17 on the lower side. The retaining ring for the hole and the retaining ring for the upper shaft provide axial positioning of the upper vibration-absorbing bearing. The lower end of the spring 16 rests on the upper bearing retaining ring 17. See Figure 4 As shown, the outer periphery of the upper vibration-absorbing ring 18 of this utility model is provided with multiple convex arc surfaces of equal diameter, so that the upper vibration-absorbing bearing has a better vibration-absorbing performance. The upper positioning protrusion 18-1 on the upper part of the upper vibration-absorbing ring 18 is set in the upper limit groove 5-11 corresponding to the upper bearing seat 5-1, so that the upper vibration-absorbing bearing can be quickly installed on the spindle seat 5.
[0024] See Figures 1-6As shown, the lower vibration-absorbing bearing of this utility model includes a lower vibration-absorbing ring 23, a lower bearing 22, and a lower bearing retaining ring 24. The lower vibration-absorbing ring 23 covers the outer periphery and lower part of the outer ring of the lower bearing 22 and is installed on the lower bearing seat 5-3. The lower bearing retaining ring 24 with an inner convex ring is disposed on the lower side of the lower bearing 22 and is in contact with the inner ring of the lower bearing 22. Two lower shaft retaining rings installed on the spindle 2 are respectively in contact with the lower bearing retaining ring 24 and the inner ring of the lower bearing 22. Multiple adjusting shims 21 are provided between the lower shaft retaining rings and the lower end face of the spindle seat 5. The lower bearing 22 is limited by the two lower shaft retaining rings, and the position of the spindle 2 is adjusted by the multiple adjusting shims 21. See Figure 4 As shown, the lower vibration-absorbing ring 23 of this invention has multiple convex arc surfaces of equal diameter evenly distributed on its outer periphery. The lower vibration-absorbing ring 23 and the convex arc surfaces provide better vibration absorption. The lower positioning protrusion 23-1 on the upper part of the lower vibration-absorbing ring 23 is set in the lower limit groove 5-31 corresponding to the lower bearing seat 5-3, which also serves to quickly install and position the components. The upper vibration-absorbing ring 18 and the lower vibration-absorbing ring 23 of this invention are made of oil-resistant nitrile rubber. This invention uses the upper and lower vibration-absorbing bearings to install the spindle rod on the spindle seat. During high-speed operation, the spindle has a small vibration stroke, runs smoothly, and has low noise.
[0025] This utility model is described in Figures 1-3 As shown, the bobbin positioning assembly of this utility model includes an upper positioning sleeve 1 and a lower positioning sleeve 3. The upper positioning sleeve 1 is installed on the upper part of the spindle 2. At least two pins are installed on the upper positioning sleeve 1 and are set in the guide grooves corresponding to the spindle 2. The upper positioning sleeve 1 is provided with an upper conical surface that connects to the top of the bobbin. The lower positioning sleeve 3 is installed in the middle of the spindle 2. One end of the spring 16 installed in the lower positioning sleeve 3 abuts against the end face of the spring 16 hole of the lower positioning sleeve 3, and the other end abuts against the lower vibration-absorbing bearing. The lower positioning sleeve 3 is provided with a lower conical surface that connects to the bottom of the bobbin. The upper positioning sleeve 1 and the lower positioning sleeve 3 are used to quickly position the bobbin and rotate it together with the spindle to twist and wind the yarn.
[0026] See Figures 1-3As shown in Figure 7, the brake assembly of this utility model includes a brake support seat 11, a brake block 6, and a wrench 8. The brake support seat 11 is installed on the brake base 5 and located at the lower part of the second slot 5-4. The wrench 8 and the brake block 6 are installed on the brake support seat 11 through a connecting shaft 7. The eccentric wheel 8-1 at the lower part of the wrench 8 is connected to the brake block 6 and drives the brake block 6 to move. The brake surface of the brake block 6 presses against the brake disc 10 to brake the brake disc 10. The brake surface of the brake block 6 disengages from the brake disc 10 to release the brake on the brake disc 10. This invention utilizes a wrench 8 that rotates along the centerline of the connecting shaft 7, causing the center of the eccentric wheel 8-1 at its lower part to move forward, thus moving the brake block 6 forward. The brake surface presses against the outer circumference of the spindle 10, thereby braking the spindle 10. When the wrench 8 is rotated, causing the center of the eccentric wheel 8-1 to move backward, the brake surface disengages from the spindle 10, releasing the brake on the spindle 10. This invention allows for braking or releasing the spindle 10 using a manually operated wrench 8, eliminating the need to stop the machine. It is convenient for disconnecting wires and improves production efficiency.
[0027] See Figure 3 As shown, the eccentric distance e between the central axis of the eccentric wheel 8-1 of the wrench 8 and the central line of the shaft hole 8-2 of the wrench 8 is between 1 and 5 mm. For example, if the eccentric distance e is 1.5 mm, 2 mm or 3 mm, the brake block 6 is moved forward or backward by the eccentric wheel 8-1. The wrench 8 is made of ABS material, that is, thermoplastic polymer structural material.
[0028] See Figures 1-3 and Figure 5 As shown in Figure 6, the lower outer periphery of the ingot holder 5 of this utility model is provided with two spaced mounting grooves 5-33 and a threaded hole between the mounting grooves 5-33. Two protrusions at the inner end of the ingot support 11 are disposed within the corresponding mounting grooves 5-33 of the ingot holder 5. Bolts pass through the ingot support 11 and are screwed into the threaded hole of the ingot holder 5. See... Figures 1-3 As shown, the brake support 11 of this utility model has a brake block guide groove 11-2 on the support part 11-1. The brake block 6 is set in the brake block guide groove 11-2 of the support part 11-1 of the brake block 6 and can move. The brake support 11 has a threaded hole. The connecting shaft 7 passes through the shaft hole 8-2 of the wrench 8 and the long slot hole on the brake block 6 and is screwed into the threaded hole of the support part 11-1 of the brake block 6. The braking surface at the end of the brake block 6 is an arc surface or a V-shaped surface. Therefore, the eccentric wheel 8-1 at the lower part of the wrench 8 rotates in the long slot hole of the brake block 6, driving the brake block 6 to move back and forth.
[0029] See Figures 1-3As shown in Figures 5 and 6, the connecting part 5-5 of this utility model is also equipped with an upper vibration-absorbing support 9, a lower vibration-absorbing support 12, and a spindle seat nut 13. The upper vibration-absorbing support 9, which has a lower journal, is installed in the connecting part 5-5 of the spindle seat 5. The upper vibration-absorbing support 9 has an inwardly protruding limiting block 9-1 located in the limiting groove 5-32 at the bottom of the spindle seat 5. The lower vibration-absorbing support 12, which has an upper journal diameter, is installed in the connecting part 5-5 of the spindle seat 5. The journal diameter of the lower journal of the upper vibration-absorbing support 9 is the same as the journal diameter of the upper journal of the upper vibration-absorbing support 9. The lower journal of the upper vibration-absorbing support 9 and the upper journal of the lower vibration-absorbing support 12 are set in the mounting holes of the frame, and the spindle is installed on the stiffening plate by the spindle seat nut 13. Figure 3 As shown, the spindle 2 of this utility model is provided with a retaining ring 15 on the upper part of the vibration-absorbing lower support 12. Therefore, during tube pulling, the retaining ring 15 prevents the lower positioning sleeve 3 from moving upward. Figures 1-3 As shown, a wire guide seat 14 is installed at the bottom of the spindle 2, and the ring seat of the wire guide seat 14 is installed on the spindle 2 by fastening screws.
[0030] See Figure 3 , 5 As shown in Figure 6, the connecting part 5-5 of the spindle seat 5 of this utility model has an upper large-diameter section and a lower small-diameter section. The large-diameter section of the connecting part 5-5 has a flat surface, and the small-diameter section has a thread. The inner hole of the vibration-absorbing upper support seat 9 has a corresponding flat surface. The vibration-absorbing upper support seat 9 is fitted onto the connecting part 5-5 and cannot rotate. The vibration-absorbing lower support seat 12 is installed between the large-diameter section and the small-diameter section by a T-shaped sleeve 20. The spindle seat nut 13 screwed onto the small-diameter section presses against the T-shaped sleeve 20. The vibration-absorbing upper support seat 9 and the vibration-absorbing lower support seat 12 of this utility model can be made of ABS material, which makes it convenient to install the spindle on the rib plate.
[0031] See Figures 1-3 As shown in Figure 8, the top of the spindle base 5 of this utility model is also equipped with a dust cover 4. The dust cover 4 is composed of two halves of the cover body. The cover body includes an upper spring sleeve 4-1, a lower spindle tube sleeve 4-3, and a cover plate 4-2 between the spring sleeve 4-1 and the spindle tube sleeve 4-3. The cover plate 4-2 is provided with a recessed insertion hole 4-22 and a protruding insert 4-21 at the splicing point. The inner wall of the spindle tube sleeve 4-3 is provided with at least two locking feet 4-31. The spindle base 5 is provided with corresponding locking slots 5-12. The inserts 4-21 of the two covers are inserted into the insertion holes 4-22 and spliced together. The locking feet 4-31 on the spindle tube sleeve 4-3 are engaged in the corresponding locking slots 5-12 on the spindle base 5. The installation is quick and convenient, which provides a better dustproof effect and improves the overall service life of the spindle.
Claims
1. A hollow spinning spindle, characterized in that: Includes a spindle holder (5), a spindle plate (10), a spindle rod (2), a cylinder positioning assembly, and a brake assembly; The spindle seat (5) is cylindrical, including an upper bearing seat (5-1) at the top, a lower bearing seat (5-3) in the middle and lower part, and a small shaft section connecting part (5-5) at the lower part of the lower bearing seat (5-3). The spindle seat (5) has a first groove (5-2) between the upper bearing seat (5-1) and the lower bearing seat (5-3) and a second groove (5-4) at the lower part of the reverse first groove (5-2). The hollow spindle rod (2) is pressed into the tapered hole of the spindle plate (10) and fixedly connected to the spindle plate (10). The upper vibration-absorbing bearing is installed on the upper part of the spindle rod (2) and the spindle seat (5). Between the bearing seats (5-1), the lower vibration-absorbing bearing is installed between the spindle rod (2) and the lower bearing seat (5-3) of the spindle seat (5); the spindle plate (10) is set inside the spindle seat (5), the top surface of the spindle plate (10) is spaced from the upper vibration-absorbing bearing, the bottom surface of the spindle plate (10) is connected to the lower vibration-absorbing bearing by adjusting shims (21), the first slot (5-2) on the spindle seat (5) is used for the spindle strip to extend into the spindle seat (5) and connect with the spindle plate (10), and the second slot (5-4) is used for the brake block (6) to extend into the spindle seat (5) and face the spindle plate (10); The tube positioning assembly includes an upper positioning sleeve (1) and a lower positioning sleeve (3). The upper positioning sleeve (1) is mounted on the upper part of the spindle (2). At least two pins are mounted on the upper positioning sleeve (1) and are set in the guide grooves corresponding to the spindle (2). The upper positioning sleeve (1) is provided with an upper conical surface that connects to the top of the tube. The lower positioning sleeve (3) is mounted on the middle part of the spindle (2). One end of the spring (16) in the lower positioning sleeve (3) is pressed against the end face of the spring hole of the lower positioning sleeve (3), and the other end is pressed against the lower vibration-absorbing bearing. The lower positioning sleeve (3) is provided with a lower conical surface that connects to the bottom of the tube. The brake assembly includes a brake support seat (11), a brake block (6), and a wrench (8). The brake support seat (11) is mounted on the brake base (5) and located at the lower part of the second slot (5-4). The wrench (8) and the brake block (6) are mounted on the brake support seat (11) via a connecting shaft (7). The eccentric wheel (8-1) at the lower part of the wrench (8) is connected to the brake block (6) and drives the brake block (6) to move. The brake surface of the brake block (6) presses against the brake disc (10) to brake the brake disc (10). The brake surface of the brake block (6) disengages from the brake disc (10) to release the brake on the brake disc (10).
2. The hollow spinning spindle according to claim 1, characterized in that: The upper vibration-absorbing bearing includes an upper vibration-absorbing ring (18), an upper bearing (19), and two upper bearing retaining rings (17). The upper vibration-absorbing ring (18) covers the outer periphery and upper and lower parts of the outer ring of the upper bearing (19). The upper vibration-absorbing ring (18) is installed on the upper bearing seat (5-1). The two upper bearing retaining rings (17) with inner convex rings are respectively set on both sides of the upper bearing (19) and connected to the inner ring of the upper bearing (19). The retaining ring of the hole installed on the spindle seat (5) is connected to the upper vibration-absorbing ring (18). The retaining ring of the upper shaft installed on the spindle rod (2) is connected to the upper bearing retaining ring (17) on the lower side. The lower end of the spring (16) rests on the upper bearing retaining ring (17).
3. A hollow spinning spindle according to claim 2, characterized in that: The outer periphery of the upper vibration damping ring (18) is provided with multiple convex arc surfaces of equal diameter, and the upper positioning protrusion (18-1) on the upper part of the upper vibration damping ring (18) is set in the upper limit positioning groove (5-11) corresponding to the upper bearing seat (5-1).
4. A hollow spinning spindle according to claim 1, characterized in that: The lower vibration-absorbing bearing includes a lower vibration-absorbing ring (23), a lower bearing (22), and a lower bearing retainer ring (24). The lower vibration-absorbing ring (23) covers the outer periphery and lower part of the outer ring of the lower bearing (22) and is installed on the lower bearing seat (5-3). The lower bearing retainer ring (24) with an inner convex ring is set on the lower side of the lower bearing (22) and is connected to the inner ring of the lower bearing (22). Two lower shaft retainer rings installed on the spindle (2) are connected to the lower bearing retainer ring (24) and the inner ring of the lower bearing (22) respectively. Multiple adjusting shims (21) are provided between the lower shaft retainer ring and the lower end face of the spindle seat (5).
5. A hollow spinning spindle according to claim 4, characterized in that: The lower vibration absorber (23) has multiple convex arc surfaces of equal diameter evenly distributed on its outer periphery, and the lower positioning protrusion (23-1) on the upper part of the lower vibration absorber (23) is set in the lower limiting groove (5-31) corresponding to the lower bearing seat (5-3).
6. A hollow spinning spindle according to claim 1, characterized in that: The eccentric distance e between the central axis of the eccentric wheel (8-1) of the wrench (8) and the center line of the shaft hole (8-2) of the wrench (8) is between 1 and 5 mm.
7. A hollow spinning spindle according to claim 1, characterized in that: The lower outer periphery of the ingot seat (5) is provided with two spaced mounting grooves (5-33) and a threaded hole between the mounting grooves (5-33). The two protrusions at the inner end of the brake ingot support seat (11) are set in the mounting grooves (5-33) corresponding to the ingot seat (5). The bolt passes through the brake ingot support seat (11) and is screwed into the threaded hole of the ingot seat (5). The support part (11-1) of the brake ingot support seat (11) is provided with a brake block guide groove (11-2). The brake block (6) is set in the brake block guide groove (11-2) of the support part (11-1) of the brake block (6) and can move. The brake ingot support seat (11) is provided with a threaded hole. The connecting shaft (7) passes through the shaft hole (8-2) of the wrench (8) and the long slot hole on the brake block (6) and is screwed into the threaded hole of the support part (11-1) of the brake block (6). The braking surface at the end of the brake block (6) is an arc surface or a V-shaped surface.
8. A hollow spinning spindle according to claim 1, characterized in that: The connecting part (5-5) of the spindle seat (5) is sequentially equipped with a vibration-absorbing upper support seat (9), a vibration-absorbing lower support seat (12) and a spindle seat nut (13). The vibration-absorbing upper support seat (9) with a lower journal is installed in the connecting part (5-5) of the spindle seat (5). The vibration-absorbing upper support seat (9) is provided with an inwardly protruding limiting block set in the limiting groove (5-32) at the bottom of the spindle seat (5). The vibration-absorbing lower support seat (12) with an upper diameter is installed in the connecting part (5-5) of the spindle seat (5). The diameter of the lower journal of the vibration-absorbing upper support seat (9) is the same as the diameter of the upper journal of the vibration-absorbing upper support seat (9). The spindle rod (2) is provided with a retaining ring (15) at the upper part of the vibration-absorbing lower support seat (12). The bottom of the spindle rod (2) is equipped with a wire guide seat (14).
9. A hollow spinning spindle according to claim 8, characterized in that: The connecting part (5-5) of the spindle seat (5) has an upper large diameter section and a lower small diameter section. The large diameter section of the connecting part (5-5) has a flat surface and the small diameter section has a thread. The inner hole of the vibration-absorbing upper support seat (9) has a corresponding flat surface. The vibration-absorbing upper support seat (9) is fitted on the connecting part (5-5) and cannot rotate. The vibration-absorbing lower support seat (12) is installed between the large diameter section and the small diameter section by a T-shaped sleeve (20). The spindle seat nut (13) screwed on the small diameter section presses against the T-shaped sleeve (20).
10. A hollow spinning spindle according to claim 1, characterized in that: The top of the spindle seat (5) is also equipped with a dust cover (4). The dust cover (4) is composed of two halves of the cover body. The cover body includes an upper spring sleeve (4-1), a lower spindle tube sleeve (4-3), and a cover plate (4-2) between the spring sleeve (4-1) and the spindle tube sleeve (4-3). The cover plate (4-2) is provided with a concave insertion hole (4-22) and a protruding insert (4-21) at the splicing point. The inner wall of the spindle tube sleeve (4-3) is provided with at least two locking feet (4-31). The spindle seat (5) is provided with a corresponding locking slot (5-12). The inserts (4-21) of the two covers are inserted into the insertion hole (4-22) and spliced together. The locking feet (4-31) on the spindle tube sleeve (4-3) are engaged in the corresponding locking slot (5-12) of the spindle seat (5).