Double-row full complement cylindrical roller bearing

Abstract

The utility model relates to the technical field of roller bearings, in particular to a double-row full complement cylindrical roller bearing which comprises an outer ring, rollers, a bolt shaft, a loose rib, a sealing assembly and a sealing assembly, a first mounting groove is formed in one end of the outer ring, a second mounting groove is formed in the other end of the outer ring, a flange is arranged on the inner circumferential surface of the outer ring, and the outer circumferential surface of the outer ring is arc-shaped; the rollers are arranged in two rows, one row of rollers is arranged between the first mounting groove and the flange, and the other row of rollers is arranged between the second mounting groove and the flange. The sealing performance is good, and high-speed rotation of a shaft can be better adapted; lubricant can be filled through the oil hole of the bolt shaft, and lubricating grease is supplemented to the roller.

Description

Technical Field

[0001] This utility model relates to the field of roller bearing technology, specifically a double-row full complement cylindrical roller bearing. Background Technology

[0002] Roller bearings are used in a certain trolley to guide and transmit torque. They are installed in a compact space, have a large load, and require high reliability.

[0003] In current roller bearings, the raceway of the bolt shaft is hardened, and to avoid stress concentration, the outer surface of the thick-walled outer ring of the roller is arc-shaped; the outer ring has two integral flanges, and the axial direction is guided by rollers. This type of bearing, while bearing heavy radial and axial loads, has certain requirements for its own sealing performance, thus requiring a roller bearing with high load capacity and long service life. Utility Model Content

[0004] In view of the shortcomings of the prior art, this utility model provides a double-row full complement cylindrical roller bearing, which has good sealing performance and is more adaptable to high-speed shaft rotation; lubricant can be added through the oil hole of the bolt shaft to replenish the rollers with grease.

[0005] To achieve the above objectives, the present invention provides a double-row full complement cylindrical roller bearing, comprising an outer ring, rollers, a bolt shaft, a flat retainer ring, a sealing assembly, and a sealing component; the outer ring has a first mounting groove at one end and a second mounting groove at the other end, a flange is provided on the inner circumferential surface of the outer ring, and the outer circumferential surface of the outer ring is arc-shaped; the rollers are arranged in two rows, one row of rollers is disposed between the first mounting groove and the flange, and the other row is disposed between the second mounting groove and the flange; the bolt shaft is provided with a large diameter... The outer ring comprises a large diameter section, a medium diameter section, a small diameter section, and a bolt section. The large diameter section, the medium diameter section, and part of the small diameter section extend into the outer ring, while the bolt section and the remaining small diameter section extend out of the outer ring. The medium diameter section supports the outer ring by roller rotation. A flat retaining ring is disposed on the outer diameter of the small diameter section. There are two sealing components: one is disposed between the inner diameter of the outer ring and the outer diameter of the large diameter section, and the other is disposed between the outer diameter of the flat retaining ring and the inner diameter of the outer ring. The locking mechanism is operatively associated with the bolt section.

[0006] Furthermore, the bolt shaft is provided with radial oil passages and axial oil passages inside. The radial oil passages are arranged perpendicularly to the axial oil passages. The radial oil passages are connected to the circumferential surface of the intermediate diameter section. The axial oil passages are connected to the end face of the bolt section. The oil port of the axial oil passage is provided with an oil cup.

[0007] Furthermore, the two sealing components are symmetrically arranged about the retaining edge as an axis of symmetry; each sealing component is provided with a rubber ring, and a skeleton is provided inside the rubber ring for supporting the rubber ring. A spring ring is provided away from the skeleton for locking the rubber ring.

[0008] Furthermore, the cross-sectional shape of the rubber ring is a "c" shaped structure.

[0009] Furthermore, one end of one of the rubber rings is disposed in the first mounting groove, and the other end is in contact with the large-diameter section.

[0010] Furthermore, one end of the other rubber ring is disposed in the second mounting groove, and the other end is in contact with the flat retaining ring.

[0011] Furthermore, the flat retaining ring is disposed on the small diameter section, close to the junction of the middle diameter section and the small diameter section, and the flat retaining ring is in close contact with the end face of the middle diameter section.

[0012] Furthermore, the outer diameter of the flat retaining ring is provided with a retaining ring step near the end face of the roller, and the retaining ring step has a stepped structure.

[0013] Furthermore, the outer diameter of the bolt segment is provided with a locking mechanism, which includes a locking washer and a locking nut. The locking nut locks the bolt segment through the locking washer.

[0014] Furthermore, at least one locking mechanism is provided.

[0015] The beneficial effects of this utility model are as follows: the bolt shaft bearing with self-sealing full filler rollers has good sealing performance and is better able to adapt to high-speed shaft rotation, thus extending its service life; lubricant can be added through the holes at both ends of the bolt shaft to replenish the rollers with grease, which can effectively meet the user's installation and use requirements, save space, and improve bearing life. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this utility model;

[0017] Figure 2 This is a schematic diagram of the bolt shaft of this utility model;

[0018] Figure 3 This is a schematic diagram of the outer ring structure of this utility model;

[0019] Figure 4 This is a diagram showing the usage state of the locking structure of this utility model;

[0020] Figure 5 This is a schematic diagram of the sealing assembly of this utility model;

[0021] In the diagram: 100, outer ring; 110, first mounting slot; 120, second mounting slot; 130, retaining edge.

[0022] 200. Bolt shaft; 210. Large diameter section; 211. Countersunk hole; 220. Medium diameter section; 230. Small diameter section; 240. Bolt section; 241. Keyway; 242. Large groove; 250. Axial oil passage; 260. Radial oil passage; 270. Boss.

[0023] 300. Locking mechanism; 310. Locking washer; 320. Locking nut.

[0024] 400, Roller,

[0025] 500, flat stop ring,

[0026] 600. Sealing assembly; 610. Rubber ring; 620. Skeleton; 630. Spring ring.

[0027] 700, oil cup. Detailed Implementation

[0028] To make the above-mentioned objects, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.

[0029] like Figure 1-5As shown, an embodiment of the present invention provides a double-row full complement cylindrical roller bearing 400, comprising an outer ring 100, rollers 400, a bolt shaft 200, a flat retaining ring, a sealing assembly, and a sealing component. The outer ring 100 has a first mounting groove 110 at one end and a second mounting groove 120 at the other end. A retaining edge 130 is provided on the inner circumferential surface of the outer ring 100, and the outer circumferential surface of the outer ring 100 is arc-shaped. The rollers 400 are arranged in two rows, one row of rollers 400 positioned between the first mounting groove 110 and the retaining edge 130, and the other row positioned between the second mounting groove 120 and the retaining edge 130. The bolt shaft 200 has a large diameter section 21. 0. The outer ring 100 consists of a middle diameter section 220, a small diameter section, and a bolt section 240. The large diameter section 210, the middle diameter section 220, and part of the small diameter section extend into the outer ring 100. The bolt section 240 and the remaining small diameter section extend out of the outer ring 100. The middle diameter section 220 supports the outer ring 100 through the rotation of the roller 400. A flat retaining ring 500 is disposed on the outer diameter of the small diameter section. There are two sealing components 600: one sealing component 600 is disposed between the inner diameter of the outer ring 100 and the outer diameter of the large diameter section 210, and the other sealing component 600 is disposed between the outer diameter of the flat retaining ring 500 and the inner diameter of the outer ring 100. The locking mechanism 300 is operatively associated with the bolt section 240.

[0030] It should be noted that the outer ring 100 adopts a three-sided structure, which separates the two rows of rolling elements through the middle side, ensuring that the rollers 400 run within the set raceway, and the frictional torque is less than that of the two rollers 400 in contact. The outer diameter of the bearing outer ring 100 is set with a 20' angle at both ends, and the angle connection is designed to be a smooth transition, ensuring that the radial force borne by the bearing is within the main load-bearing area.

[0031] In one embodiment, the bolt shaft 200 is provided with a radial oil passage 260 and an axial oil passage 250 inside. The radial oil passage 260 and the axial oil passage 250 are arranged perpendicularly. The radial oil passage 260 is connected to the circumferential surface of the intermediate diameter section 220; the axial oil passage 250 is connected to the end face of the bolt section 240; and the oil port of the axial oil passage 250 is provided with an oil cup 700.

[0032] In one embodiment, two sealing components 600 are symmetrically arranged about the retaining edge 130 as the axis of symmetry; each sealing component 600 is provided with a rubber ring 610, and a skeleton 620 is provided inside the rubber ring 610 to support the rubber ring 610. A spring ring 630 is provided away from the skeleton 620 to lock the rubber ring 610.

[0033] It should be noted that the sealing assembly 600 consists of rubber, a steel skeleton 620, and a spring. The spring ensures that the sealing lip remains in contact with the sleeve through pressure, preventing impurities from entering the bearing. The sealing ring has a 30° angle at its contact point with the outer ring 100 for easy installation. The outer diameter of the sealing assembly 600 and the outer ring 100 are an interference fit.

[0034] In one embodiment, the cross-sectional shape of the rubber ring 610 is a "c" shaped structure.

[0035] Furthermore, one end of a rubber ring is positioned within the first mounting groove 110, while the other end contacts the large-diameter section 210.

[0036] Furthermore, one end of another rubber ring is positioned within the second mounting groove 120, while the other end contacts the flat retaining ring 500.

[0037] In one embodiment, the flat retaining ring 500 is disposed on the small diameter section, close to the junction of the middle diameter section 220 and the small diameter section, and the flat retaining ring 500 is in close contact with the end face of the middle diameter section 220.

[0038] In one embodiment, a retaining ring step is provided on the outer diameter of the flat retaining ring 500 near the end face of the roller 400, and the retaining ring step has a stepped structure.

[0039] In one embodiment, a locking mechanism 300 is provided on the outer diameter of the bolt segment 240. The locking mechanism 300 includes a locking washer 310 and a locking nut 320. The locking nut 320 locks the bolt segment 240 through the locking washer 310.

[0040] Furthermore, at least one locking mechanism 300 is provided.

[0041] Preferably, the number of locking mechanisms 300 on the bolt segment 240 is set to 2 to ensure a stronger locking effect;

[0042] Furthermore, the locking washer 310 is a spring washer.

[0043] In the aforementioned double-row full complement cylindrical roller 400 bearing: 1) the outer ring 100 of the roller bearing has a three-sided structure (e.g. Figure 3 (As shown) A retaining edge is provided between the first mounting groove 110 and the raceway, and a retaining edge is provided between the second mounting groove 120 and the raceway. The two rows of rollers 400 are respectively assembled on the three retaining edges (as shown). Figure 3 In the two raceways formed between the outer ring 100 and the raceway 110, sealing ring mounting grooves are provided on both sides: the first mounting groove 110 and the second mounting groove 120 (as shown). Figure 3 (As shown); the outer ring with an outer diameter of 100 can also be designed as a large arc surface structure, and the R value is designed according to the actual use requirements.

[0044] 2) The roller bearing's central shaft acts as the inner ring, supporting the roller bearing's operation. A boss 270 is provided between the large diameter section 210 and the intermediate diameter section 220; the large diameter section 210 and the boss 270 form the first shoulder, and the boss 270 and the intermediate diameter section 220 form the second shoulder (e.g., Figure 2As shown), this ensures sufficient internal cavity space for the bearing, enhancing heat dissipation; the first shoulder engages with the sealing assembly 600 to prevent dust and impurities from entering; the second shoulder serves to axially position the left row of rollers 400. The intermediate diameter section 220 is equipped with raceways (such as...). Figure 2 As shown), it supports the rotation of the roller 400 and also serves to position the flat retaining ring 500; after assembly, the flat retaining ring 500 acts as the right-side retaining edge; the flat retaining ring 500 and the right-side seal cooperate to prevent dust and impurities from entering. A large groove 242 is provided on the end face of the bolt section 240 (as shown). Figure 2 As shown, a wrench space is provided, and the oil cup 700 is hidden in the shaft so as not to affect the installation of other parts. The shaft is designed with lubrication oil passages, namely a long straight oil passage in the axial direction and a radial oil passage 260 in the raceway position, to provide lubrication to the inside of the roller bearing and enable the bearing to operate normally.

[0045] 3) Bolt segment 240 is designed with a threaded structure and keyway 241 (e.g.) Figure 2 As shown), during installation, the lock nut 320 and lock washer 310 are pressed tightly against the mounting surface to provide positioning. A countersunk hexagonal hole is designed on the left side of the shaft (as shown). Figure 2 As shown in the figure, it is easy to install, disassemble and tighten.

[0046] 4) The sealing assembly 600 consists of a steel frame 620, rubber, and a spring (e.g., Figure 5 (As shown). The sealing assembly 600 has a large 30° chamfer for easy assembly, and the bottom of the sealing lip is interference-fitted with the shaft and the flat retaining ring 500. To ensure sealing performance, a spring mounting groove is provided in the rubber, and the preload of the spring is used to press the sealing lip to maintain an interference fit at all times, thus achieving a sealing effect.

[0047] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0048] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0049] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0050] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature. It should be noted that when an element is referred to as "fixed to" or "set on" another element, it can be directly on the other element or there may be an intermediate element present. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element present. The terms "vertical," "horizontal," "above," "below," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible embodiments.

Claims

1. A double-row full complement cylindrical roller bearing, characterized in that: include The outer ring has a first mounting groove at one end and a second mounting groove at the other end. A retaining edge is provided on the inner circumferential surface of the outer ring, and the outer circumferential surface of the outer ring is arc-shaped. The rollers are arranged in two rows, with one row of rollers positioned between the first mounting groove and the retaining edge, and the other row positioned between the second mounting groove and the retaining edge. The bolt shaft is provided with a large diameter section, a medium diameter section, a small diameter section and a bolt section. The large diameter section, the medium diameter section and part of the small diameter section extend into the outer ring, and the bolt section and the remaining small diameter section extend out of the outer ring. The medium diameter section supports the outer ring by rotating a roller. A flat retaining ring is disposed on the outer diameter of the small diameter section; There are two sealing components: one sealing component is disposed between the inner diameter of the outer ring and the outer diameter of the large diameter section, and the other sealing component is disposed between the outer diameter of the flat retaining ring and the inner diameter of the outer ring. A locking mechanism is operatively associated with the bolt segment.

2. The double-row full complement cylindrical roller bearing according to claim 1, characterized in that: The bolt shaft is internally provided with radial oil passages and axial oil passages. The radial oil passages are arranged perpendicularly to the axial oil passages. The radial oil passages are connected to the circumferential surface of the middle diameter section. The axial oil passages are connected to the end face of the bolt section. The oil port of the axial oil passage is provided with an oil cup.

3. A double-row full complement cylindrical roller bearing according to claim 1, characterized in that: The two sealing components are symmetrically arranged about the retaining edge as an axis of symmetry; each sealing component is provided with a rubber ring, and a skeleton is provided inside the rubber ring for supporting the rubber ring. A spring ring is provided away from the skeleton for locking the rubber ring.

4. A double-row full complement cylindrical roller bearing according to claim 3, characterized in that: The cross-sectional shape of the rubber ring is a "c" shape.

5. A double-row full complement cylindrical roller bearing according to claim 3, characterized in that: One end of the rubber ring is disposed in the first mounting groove, and the other end is in contact with the large-diameter section.

6. A double-row full complement cylindrical roller bearing according to claim 3, characterized in that: One end of the other rubber ring is disposed in the second mounting groove, and the other end is in contact with the flat retaining ring.

7. A double-row full complement cylindrical roller bearing according to claim 1, characterized in that: The flat retaining ring is disposed on the small diameter section, near the junction of the middle diameter section and the small diameter section, and the flat retaining ring is in close contact with the end face of the middle diameter section.

8. A double-row full complement cylindrical roller bearing according to claim 1, characterized in that: The outer diameter of the flat retaining ring is provided with a retaining ring step near the end face of the roller, and the retaining ring step is a stepped structure.

9. A double-row full complement cylindrical roller bearing according to any one of claims 1-8, characterized in that: The outer diameter of the bolt segment is provided with a locking mechanism, which includes a locking washer and a locking nut. The locking nut locks the bolt segment through the locking washer.

10. A double-row full complement cylindrical roller bearing according to claim 9, characterized in that: At least one locking mechanism is provided.

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