Rotor spinning bearing

Abstract

The utility model discloses a rotor spinning bearing which comprises a mandrel and an outer ring, and a cavity is formed between the outer ring and the mandrel. An annular groove is formed in the outer wall of the outer ring, a limiting ring is arranged in the annular groove in a sleeved mode, the limiting ring is used for being connected with a shaft seat installation hole of the rotor spinner in an interference fit mode, the limiting ring is provided with an opening, a protruding part is arranged on the end face of the limiting ring, and a notch communicated with the annular groove is formed in the outer wall of the outer ring and corresponds to the protruding part. The outer ring is limited to rotate freely relative to a shaft seat of the rotor spinner. The rotor spinner is novel in structure, the limiting ring can prevent the outer ring from freely rotating relative to the shaft seat of the rotor spinner and being abraded, the service life of the outer ring is prolonged, and practicability is high.

Description

Technical Field

[0001] This utility model belongs to the field of bearing technology, and in particular relates to an air-jet spinning bearing. Background Technology

[0002] Air-jet spinning is a technology that uses airflow to condense and twist fibers in a high-speed rotating spinning cup to produce yarn. An air-jet spinning machine is a device that uses this technology to spin yarn.

[0003] In air-jet spinning machines, air-jet spinning bearings, as high-speed precision bearings, are specifically designed to support the spinning cup of the spinning machine to ensure smooth operation. Typically, the outer ring of the air-jet spinning bearing is mounted on the shaft seat of the air-jet spinning machine, and the outer ring and the mounting hole of the shaft seat are connected by a clearance fit. When the rotational speed is high, the outer ring may rotate freely and wear, significantly shortening its service life.

[0004] Existing patent document (publication number: CN208138327U) discloses a "bearing for an air-jet spinning machine", which also has the above-mentioned technical problems. Summary of the Invention

[0005] The purpose of this utility model is to solve the above-mentioned technical problems existing in the prior art and to provide an air-jet spinning bearing with a novel structure. The limiting ring can prevent the outer ring from rotating freely relative to the shaft seat of the air-jet spinning machine and thus wear, extending the service life of the outer ring and making it highly practical.

[0006] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0007] An air-jet spinning bearing includes a mandrel and an outer ring, with a cavity formed between the outer ring and the mandrel. The outer ring is characterized by an annular groove on its outer wall, within which a retaining ring is fitted. The retaining ring is used for an interference fit connection with a mounting hole on the shaft seat of an air-jet spinning machine. The retaining ring has an opening and a protrusion on its end face. The outer wall of the outer ring has a notch communicating with the annular groove, corresponding to the protrusion, to restrict free rotation of the outer ring relative to the shaft seat of the air-jet spinning machine. This bearing has a novel structure; the retaining ring prevents the outer ring from wearing due to free rotation relative to the shaft seat of the air-jet spinning machine, extending the service life of the outer ring and making it highly practical.

[0008] Furthermore, the annular groove is provided with a positioning groove, and the inner wall of the limiting ring is provided with an inner protrusion. The inner protrusion corresponds to the positioning groove, which increases the contact area between the limiting ring and the outer ring, and the limiting range is larger. This improves the limiting effect of the limiting ring on the outer ring, making the outer ring less likely to rotate freely.

[0009] Furthermore, the limiting ring is equipped with an axial reinforcement, which improves the structural strength of the limiting ring, making it less prone to deformation and damage under pressure, and extending its service life.

[0010] Furthermore, the outer wall of the outer ring is provided with an oil injection hole that communicates with the chamber. Lubricating oil is injected into the oil injection hole to lubricate the chamber, reduce friction, and slow down wear.

[0011] Furthermore, a sealing plug is provided on the oil filling hole. The sealing plug blocks the oil filling hole, preventing lubricating oil from leaking out, and making it convenient to use.

[0012] Furthermore, a spiral groove is formed on the inner wall of the outer ring. The spiral groove can store lubricating oil, forming a continuous oil film, improving the lubrication effect. When the bearing rotates, the spiral structure generates a pumping action, promoting the circulation of lubricating oil and avoiding dry friction.

[0013] Furthermore, the outer ring surface is coated with a wear-resistant layer. This wear-resistant layer can be made of silicon carbide, which improves the wear resistance of the outer ring, making it less prone to wear and rust, and extending its service life.

[0014] This utility model, by adopting the above-mentioned technical solution, has the following beneficial effects:

[0015] 1. The design of the locating ring easily fills the gap difference between the outer ring and the mounting hole of the air-jet spinning machine, making the locating ring and the mounting hole of the air-jet spinning machine interference fit. The locating ring is difficult to rotate freely. The protrusion and notch fit together, which allows the locating ring to restrict the free rotation of the outer ring, thereby reducing wear. Compared with the existing technology where the outer ring and the mounting hole of the air-jet spinning machine use a clearance fit connection, this design avoids the outer ring from rotating freely and wearing out, thus extending the service life of the outer ring.

[0016] 2. After the limit ring is installed, the protrusion is located in the notch, and the inner protrusion is embedded in the positioning groove, which increases the contact area between the limit ring and the outer ring, and the limiting range is larger, thereby improving the limiting effect of the limit ring on the outer ring, making the outer ring less likely to rotate freely.

[0017] 3. The spiral groove can store lubricating oil, forming a continuous oil film to improve the lubrication effect. When the bearing rotates, the spiral structure generates a pumping effect, promoting the circulation of lubricating oil and avoiding dry friction. Attached Figure Description

[0018] The present invention will be further described below with reference to the accompanying drawings:

[0019] Figure 1 This is a schematic diagram of the structure of Embodiment 1 of the present invention;

[0020] Figure 2 This is a schematic diagram of the connection between the outer ring and the sealing plug in Example 1;

[0021] Figure 3 This is a schematic diagram of the limiting ring structure in Example 1;

[0022] Figure 4 This is a schematic diagram of the cross-sectional structure of Example 1;

[0023] Figure 5 This is a schematic diagram of the cross-sectional structure of the outer ring in Example 1;

[0024] Figure 6 This is a schematic diagram of the outer ring structure in Example 2;

[0025] Figure 7 This is a schematic diagram of the limiting ring structure in Example 2;

[0026] Figure 8 This is a schematic diagram of the cross-sectional structure of the outer ring in Example 3.

[0027] In the diagram: 1-Mandrel; 2-Outer ring; 3-Steel ball; 4-Cage; 5-O-ring seal; 6-Cavity; 7-Oil injection hole; 8-Sealing plug; 9-Ring groove; 10-Limiting ring; 11-Protrusion; 12-Notch; 13-Axial reinforcement; 14-Positioning groove; 15-Inner protrusion; 16-Helical groove. Detailed Implementation

[0028] like Figures 1 to 5 The image shown is an embodiment of this utility model.

[0029] An air-jet spinning bearing includes: a spindle 1, an outer ring 2, steel balls 3, and a cage 4. One end of the spindle 1 is fitted with a spinning cup, and the other end is connected to a power transmission mechanism. The steel balls 3 are mounted on the cage 4 and are located between the outer groove of the spindle 1 and the inner groove of the outer ring 2. The cage 4 is guided by the outer ring 2 with a guide gap of 0.15-0.2 mm. Both ends of the outer ring 2 are provided with O-ring seals 5. The above structure is prior art and will not be described in detail here.

[0030] A cavity 6 is formed between the outer ring 2 and the spindle 1. An oil injection hole 7 communicating with the cavity 6 is provided on the outer wall of the outer ring 2, and a sealing plug 8 is provided on the oil injection hole 7.

[0031] Lubricating oil is injected into the oil injection hole 7 to lubricate the chamber 6, reduce friction, and slow down wear. After the oil is injected, the oil injection hole 7 is blocked by the sealing plug 8 to prevent the lubricating oil from leaking out, making it convenient to use.

[0032] The outer ring 2 has an annular groove 9 on its outer wall, and a limiting ring 10 is fitted in the annular groove 9. The outer ring 2 is installed on the shaft seat of the air-jet spinning machine. The limiting ring 10 is interference-fitted with the shaft seat mounting hole. The limiting ring 10 is made of nylon material, which is strong, reliable and low cost. The limiting ring 10 has an opening for easy installation. The end face of the limiting ring 10 has a protrusion 11. The outer wall of the outer ring 2 has a notch 12 that communicates with the annular groove 9. The notch 12 corresponds to the protrusion 11.

[0033] The setting of the limiting ring 10 can easily fill the gap difference between the outer ring 2 and the shaft seat mounting hole of the air-jet spinning machine, so that the limiting ring 10 and the shaft seat mounting hole of the air-jet spinning machine are interference fit. The limiting ring 10 is difficult to rotate freely. The protrusion 11 and the notch 12 cooperate, so that the limiting ring 10 can restrict the free rotation of the outer ring 2, thereby reducing wear. Compared with the existing technology where the outer ring 2 and the shaft seat mounting hole of the air-jet spinning machine are connected by a clearance fit, this avoids the outer ring from rotating freely and wearing out, and extends the service life of the outer ring 2.

[0034] The limiting ring 10 is provided with an axial reinforcement 13, which protrudes from the end face of the limiting ring 10 and is lower than the protrusion 11. The axial reinforcement 13 improves the structural strength of the limiting ring 10, making it less prone to deformation and damage under pressure, and extending its service life.

[0035] The outer ring 2 is coated with a wear-resistant layer, which can be made of silicon carbide, improving the wear resistance of the outer ring 2, making it less prone to wear and rust, and extending its service life.

[0036] like Figure 6 and Figure 7 The image shown is a second embodiment of this utility model.

[0037] In the technical solution based on Embodiment 1, the annular groove 9 is provided with a positioning groove 14, which is close to the notch 12 for easy processing. The inner wall of the limiting ring 10 is provided with an inner protrusion 15, which corresponds to the positioning groove 14.

[0038] After the limiting ring 10 is installed, the protrusion 11 is located in the notch 12, and the inner protrusion 15 is embedded in the positioning groove 14, which increases the contact area between the limiting ring 10 and the outer ring 2, and the limiting range is larger, thereby improving the limiting effect of the limiting ring 10 on the outer ring 2, and making the outer ring 2 less likely to rotate freely.

[0039] like Figure 8 The image shown is Embodiment 3 of this utility model.

[0040] In the technical solution based on Embodiment 2, a spiral groove 16 is provided on the inner wall of the outer ring 2. The spiral groove 16 can store lubricating oil, form a continuous oil film, improve the lubrication effect, and generate a pumping effect when the bearing rotates, promoting the circulation of lubricating oil and avoiding dry friction.

[0041] The above are merely specific embodiments of this utility model, but the technical features of this utility model are not limited thereto. Any simple changes, equivalent substitutions, or modifications made based on this utility model to solve essentially the same technical problems and achieve essentially the same technical effects are all covered within the protection scope of this utility model.

Claims

1. An air-jet spinning bearing, comprising: A mandrel and an outer ring, wherein a cavity is formed between the outer ring and the mandrel; Its features are: The outer ring has an annular groove on its outer wall, and a limiting ring is fitted in the annular groove. The limiting ring is used to make an interference fit with the mounting hole of the bearing seat of the air-jet spinning machine. The limiting ring has an opening and a protrusion on its end face. The outer wall of the outer ring has a notch that communicates with the annular groove. The notch corresponds to the protrusion to restrict the free rotation of the outer ring relative to the bearing seat of the air-jet spinning machine.

2. The air-jet spinning bearing according to claim 1, characterized in that: The annular groove is provided with a positioning groove, and the inner wall of the limiting ring is provided with an inner protrusion, which corresponds to the positioning groove.

3. The air-jet spinning bearing according to claim 1, characterized in that: The limiting ring is provided with an axial reinforcement.

4. The air-jet spinning bearing according to claim 1, characterized in that: The outer wall of the outer ring is provided with an oil injection hole that communicates with the cavity.

5. The air-jet spinning bearing according to claim 4, characterized in that: The oil injection hole is equipped with a sealing plug.

6. The air-jet spinning bearing according to claim 1, characterized in that: The inner wall of the outer ring is provided with a spiral groove.

7. The air-jet spinning bearing according to claim 1, characterized in that: The outer ring is coated with a wear-resistant layer.

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