Tapered roller guide unit and tapered roller bearing

Abstract

The invention provides a tapered roller guide unit and a tapered roller bearing, and relates to the technical field of bearings. The tapered roller guide unit comprises a plurality of limiting bodies, a first end ring and a second end ring, the limiting bodies are distributed along the circumference, and a plurality of pockets matched with the tapered rollers are formed between the adjacent limiting bodies; the first end ring is arranged at one end of the limiting body and is fixedly connected with the limiting body; the second end ring is coaxial with the first end ring and is fixed at the other end of the limiting body; at least two contact parts are formed between each limiting body and the same tapered roller, and the two contact parts are located on the inner side and the outer side of the center circle of the multiple pockets respectively in the radial direction of the first end ring. According to the tapered roller guiding unit, the gap between the tapered roller and the limiting body can be effectively reduced, guiding of the tapered roller is more accurate, meanwhile, the number of the contact parts is increased, loads can be dispersed to more areas, local stress concentration is avoided, and fatigue damage of the tapered roller guiding unit or the tapered roller is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of bearings, and in particular to a tapered roller guide unit and a tapered roller bearing. Background Art

[0002] Bearings play the role of supporting rotating parts, reducing friction and wear, and bearing radial and axial loads in machinery, thereby ensuring the rotation accuracy of the shaft and improving the operating efficiency and reliability of the mechanical system. They are widely used in various mechanical equipment to ensure their stable operation. The guiding function of the rolling bearing cage (guiding and driving the rolling elements to run on the correct raceway) is very important. In the bearing, there is a gap between the cage and the rings and rolling elements, which can "freely swim" in the radial, axial, circumferential and angular directions. It is the part with the least motion constraints and the greatest degree of freedom. This characteristic is more disturbed when the bearing is in high-speed operation. Under the superposition of loads such as friction, collision, centrifugal force and inertia, the cage will cause a series of problems such as friction, wear, temperature rise, burning, deformation, vibration, noise and even failure of the bearing. Summary of the invention

[0003] In view of the above problems existing in the prior art, the present invention provides a tapered roller guide unit and a tapered roller bearing to improve the problem of large clearance between the existing retaining frame and the tapered roller.

[0004] To achieve the above-mentioned purpose and other related purposes, the first aspect of the present invention provides a tapered roller guide unit, which includes a plurality of limiting bodies, a first end ring and a second end ring, wherein the plurality of limiting bodies are distributed along the circumference, and a plurality of pockets matching the tapered rollers are formed between adjacent limiting bodies; the first end ring is arranged at one end of the limiting body and is fixedly connected to the limiting body; the second end ring is coaxial with the first end ring and is fixed to the other end of the limiting body; wherein at least two contact portions are formed between each of the limiting bodies and the same tapered roller, and along the radial direction of the first end ring, the two contact portions are respectively located on the inner and outer sides of the center circle of the plurality of pockets.

[0005] In one embodiment of the present invention, the limiting body includes a first baffle, a second baffle and a third baffle, the first baffle is arranged on the center circle, the second baffle is arranged outside the center circle, and the third baffle is arranged inside the center circle.

[0006] In one embodiment of the present invention, a tangent angle θ1 between the contact point of the tapered roller and the second baffle is equal to a tangent angle θ2 between the contact point of the tapered roller and the third baffle.

[0007] In one embodiment of the present invention, a first self-locking hole is provided on a side of the first end ring away from the limiting body, a first guide ball is provided in the first self-locking hole, and the first guide ball is higher than the surface of the first end ring.

[0008] In one embodiment of the present invention, a second self-locking hole is provided on a side of the second end ring away from the limiting body, a second guide ball is provided in the second self-locking hole, and the second guide ball is higher than the surface of the second end ring.

[0009] In one embodiment of the present invention, a first groove is provided at one end of the first end ring away from the second end ring, a first magnetic strip is fixedly provided in the first groove, and a surface of the first magnetic strip is lower than a surface of the first end ring.

[0010] In one embodiment of the present invention, a second groove is provided at one end of the second end ring away from the first end ring, a second magnetic strip is fixedly provided in the second groove, and a surface of the second magnetic strip is lower than a surface of the second end ring.

[0011] A second aspect of the present invention provides a tapered roller bearing, which includes a bearing inner ring, a bearing outer ring, a tapered roller and the above-mentioned tapered roller guide unit, wherein the bearing outer ring is sleeved outside the bearing inner ring, the tapered roller guide unit is arranged between the bearing outer ring and the bearing inner ring, and the tapered roller is arranged in the pocket of the tapered roller guide unit.

[0012] In one embodiment of the present invention, the tapered roller bearing further comprises a first rib and a second rib, wherein the first rib is fixedly disposed on the same side of the first end ring, and the second rib is fixedly disposed on the same side of the second end ring.

[0013] In one embodiment of the present invention, the first rib is an annular shape coaxial with the bearing inner ring, and the outer edge of the first rib is fixedly connected to one end of the bearing outer ring; the second rib is an annular shape coaxial with the bearing inner ring, and the outer edge of the second rib is fixedly connected to the other end of the bearing outer ring.

[0014] The tapered roller guide unit of the present invention has multiple limiting bodies distributed along the circumference, one end of the limiting body is fixedly connected to the first end ring, the other end of the limiting body is fixedly connected to the second end ring, multiple pockets adapted to the tapered roller are formed between adjacent limiting bodies, and at least two contact portions are formed between each limiting body and the same tapered roller, and along the radial direction of the first end ring, the two contact portions are respectively located on the inner side and the outer side of the center circle of the multiple pockets. The tapered roller guide unit of the present application can not only effectively reduce the gap between the tapered roller and the limiting body, and reduce the impact of material deformation, but also the increase in contact portions can disperse the load to more areas, avoid local stress concentration, and reduce fatigue damage to the guide unit or the tapered roller. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present invention. For ordinary technicians in this field, other embodiments can be obtained based on these drawings without paying creative work.

[0016] Figure 1 The matching relationship between the tapered roller and the cage in the prior art;

[0017] Figure 2 It is a schematic structural diagram of a tapered roller bearing in one embodiment of the present invention;

[0018] Figure 3 for Figure 2 A partial enlarged schematic diagram of the middle A area;

[0019] Figure 4 for Figure 2 A partial enlarged schematic diagram of the middle B area;

[0020] Figure 5 It is a cross-sectional schematic diagram of a first end ring of a tapered roller guide unit in one embodiment of the present invention;

[0021] Figure 6 is a schematic cross-sectional view of a tapered roller guide unit according to an embodiment of the present invention;

[0022] Figure 7 FIG. 1 is a schematic diagram of the cooperation between the limiting body and the roller of the tapered roller guide unit in one embodiment of the present invention.

[0023] Component number description:

[0024] 10. Tapered roller bearing; 100. Tapered roller guide unit; 110. Limiting body; 111. Pocket; 1111. Contact portion; 1112. Center circle; 112. First baffle; 113. Second baffle; 114. Third baffle; 120. First end ring; 121. First self-locking hole; 122. First guide ball; 123. First groove; 124. First magnetic strip; 130. Second end ring; 131. Second self-locking hole; 132. Second guide ball; 133. Second groove; 134. Second magnetic strip; 200. Bearing inner ring; 300. Bearing outer ring; 400. Tapered roller; 500. First flange; 600. Second flange; 700. Protrusion. DETAILED DESCRIPTION

[0025] The following is an explanation of the embodiments of the present invention by specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the features in the following embodiments and the embodiments can be combined with each other without conflict. It should also be understood that the terms used in the embodiments of the present invention are intended to describe specific embodiments, rather than to limit the scope of protection of the present invention. The test methods for which specific conditions are not specified in the following examples are usually carried out under conventional conditions or according to the conditions recommended by the manufacturers.

[0026] When numerical ranges are given in the embodiments, it should be understood that unless otherwise specified in the present invention, both endpoints of each numerical range and any value between the two endpoints can be selected. Unless otherwise defined, all technical and scientific terms used in the present invention are familiar to those skilled in the art and the description of the present invention, and any method, device and material of the prior art similar or equivalent to the method, device and material in the embodiments of the present invention can also be used to implement the present invention.

[0027] It should be noted that the terms such as "upper", "lower", "left", "right", "middle" and "one" etc. used in this specification are only for the convenience of description and are not intended to limit the scope of implementation of the present invention. Changes or adjustments to their relative relationships, without substantially changing the technical content, should also be regarded as the scope of implementation of the present invention.

[0028] See also Figure 1In the existing tapered roller bearings, the tapered roller is arranged in the slot of the cage, and the tapered roller has only one contact point with the slot on the same side, and the contact point between the tapered roller and the cage is located on the same side of the tapered roller axis. The above structure will cause a large clearance between the tapered roller and the slot, which will not only cause the rolling element to generate large vibration and noise during operation, affecting the smooth operation of the equipment and possibly causing noise pollution, but also cause the rolling element to generate additional impact load when subjected to force, accelerate the wear of the rolling element and the raceway, and shorten the bearing life. Therefore, the present application provides a tapered roller guide unit 100 and a tapered roller bearing 10 to solve the above problems.

[0029] See also Figure 2 , Figure 3 , Figure 6 and Figure 7 The tapered roller guide unit 100 provided by the present invention comprises a plurality of stoppers 110, a first end ring 120 and a second end ring 130. The plurality of stoppers 110 are distributed along the circumference, and a plurality of pockets 111 adapted to the tapered roller 400 are formed between adjacent stoppers 110; the first end ring 120 is disposed at one end of the stopper 110 and is fixedly connected to the stopper 110; the second end ring 130 is coaxial with the first end ring 120, and the second end ring 130 is fixed to the other end of the stopper 110. At least two contact portions 1111 are formed between each stopper 110 and the same tapered roller 400, and along the radial direction of the first end ring 120, the two contact portions 1111 are respectively located on the inner side and the outer side of the center circle 1112 of the plurality of pockets 111. In the tapered roller guide unit 100 of the present application, the contact portions 1111 are distributed on both sides of the center circle 1112, which can effectively reduce the gap between the tapered roller 400 and the limiting body 110, and guide the tapered roller 400 more accurately. At the same time, the increase in the contact portions 1111 can disperse the load to more areas, avoid local stress concentration, and reduce fatigue damage to the tapered roller guide unit 100 or the tapered roller 400. In the present application, the gap between the tapered roller 400 and the limiting body 110 is reduced to 60-80% of the gap between the conventional roller and the cage.

[0030] See also Figure 2 , Figure 3 and Figure 7 In one embodiment, the limiting body 110 and the first end ring 120 are integrally formed, and the limiting body 110 and the second end ring 130 are fixedly connected by self-locking screws. The assembly process of the tapered roller guide unit 10 and the tapered roller 400 is as follows: first, the limiting body 110 and the first end ring 120 are integrally formed, and then the rolling body 400 is placed in the pocket 111 formed by the adjacent limiting body 110, and then the limiting body 110 and the second end ring 130 are fixedly connected by self-locking screws.

[0031] See also Figure 3 , Figure 6 and Figure 7 In one embodiment, the stopper 110 includes a first stopper 112, a second stopper 113, and a third stopper 114. The first stopper 112 is arranged on the center circle 1112 and forms a contact portion 1111 close to the center of the tapered roller 400 with the tapered roller 400. The second stopper 113 is arranged on the outside of the center circle 1112 and forms an outside contact portion 1111 with the tapered roller 400. The third stopper 114 is arranged on the inside of the center circle 1112 and forms an inside contact portion 1111 with the tapered roller 400. In other embodiments, the stopper 110 may also include more stoppers to form more contact portions 1111, as long as the contact points between the tapered roller 400 and the stopper 110 are located on both sides of the center circle 1112. In this embodiment, the tangent angle θ1 of the contact point between the tapered roller 400 and the second baffle 113 is equal to the tangent angle θ2 of the contact point between the tapered roller 400 and the third baffle 114. The symmetrical tangent angle design can evenly guide the motion trajectory of the tapered roller 400, suppress deflection, optimize load distribution and reduce local stress, reduce friction loss and temperature rise, and enhance the dynamic stability of the tapered roller 400 to reduce vibration and noise. In this embodiment, there is a gap between the first baffle 112 and the second baffle 113, and there is a gap between the second baffle 113 and the third baffle 114, which can ensure that the lubricant flows smoothly inside the bearing. Here, the size of θ1 and θ2 can be set with reference to the existing standards in the field. For example, 20°≤θ1=θ2≤22.5°.

[0032] See also Figures 3 to 5 In one embodiment, a first self-locking hole 121 is provided on the side of the first end ring 120 away from the limiting body 110, a first guide ball 122 is provided in the first self-locking hole 121, and the first guide ball 122 is higher than the surface of the first end ring 120. A second self-locking hole 131 is provided on the side of the second end ring 130 away from the limiting body 110, a second guide ball 132 is provided in the second self-locking hole 131, and the second guide ball 132 is higher than the surface of the second end ring 130. In this embodiment, the first guide ball 122 rotates freely in the first self-locking hole 121, and the second guide ball 132 rotates freely in the second self-locking hole 131. When the tapered roller guide unit 100 rotates along its circumferential direction, the sliding friction is converted into rolling friction, which can reduce the wear of the tapered roller guide unit 100, avoid lubrication failure or material softening caused by local high temperature due to sliding friction, and improve the smoothness of operation.

[0033] See also Figure 4 and Figure 5In one embodiment, a first groove 123 is provided at one end of the first end ring 120 away from the second end ring 130, a first magnetic strip 124 is fixedly provided in the first groove 123, and the surface of the first magnetic strip 124 is lower than the surface of the first end ring 120. A second groove 133 is provided at one end of the second end ring 130 away from the first end ring 120, a second magnetic strip 134 is fixedly provided in the second groove 133, and the surface of the second magnetic strip 134 is lower than the surface of the second end ring 130. Magnetic strips are provided at both ends of the tapered roller guide unit 100. When there are tiny metal impurities inside the bearing, the metal impurities can be adsorbed into the first groove 123 and the second groove 133 by the magnetic strips to prevent the metal impurities from entering the raceway friction area. Furthermore, collecting metal impurities inside the bearing can not only effectively reduce wear, prevent and reduce premature failure of the bearing, and extend its service life, but also improve operating stability, reduce vibration and noise, enhance lubrication effects, maintain the cleanliness and performance of the lubricant, thereby extending the service life of the lubricant; in addition, reducing impurities can also help increase the fatigue life of the bearing and reduce the risk of fatigue failure.

[0034] See also Figure 2 , Figure 3 and Figure 7 The tapered roller bearing 10 provided by the present invention includes a tapered roller guide unit 100, a bearing inner ring 200, a bearing outer ring 300 and a tapered roller 400. The bearing outer ring 300 is sleeved outside the bearing inner ring 200, the tapered roller guide unit 100 is arranged between the bearing outer ring 300 and the bearing inner ring 200, and the tapered roller 400 is arranged in the pocket 111 of the tapered roller guide unit 100.

[0035] See also Figure 2 and Figure 3In one embodiment, the tapered roller bearing 10 further includes a first flange 500 and a second flange 600, wherein the first flange 500 is fixedly arranged on the same side of the first end ring 120, and the second flange 600 is fixedly arranged on the same side of the second end ring 130. The first flange 500 is an annular shape coaxial with the bearing inner ring 200, and the outer edge of the first flange 500 is fixedly connected to one end of the bearing outer ring 300; the second flange 600 is an annular shape coaxial with the bearing inner ring 200, and the outer edge of the second flange 600 is fixedly connected to the other end of the bearing outer ring 300. The first flange 500 and the second flange 600 can not only effectively share the axial load and ensure that the tapered roller bearing 10 can stably withstand the axial force during operation, but also guide the rotation of the tapered roller guide unit 100 in the circumferential direction and enhance the strength of the tapered roller guide unit 100. Further, the first rib 500 cooperates with the first guide ball 122, and the second rib 600 cooperates with the second guide ball 132, so as to convert the sliding friction of the tapered roller guide unit 100 into rolling friction, and have a certain buffering effect on the tapered roller guide unit 100, so as to continuously correct the movement of the tapered roller 400. The installation method of the first rib 500 and the second rib 600 is not limited here, for example, the first rib 500 and the second rib 600 are respectively fixedly connected to the bearing outer ring 300 by tightening screws. By providing the first rib 500 and the second rib 600, the rigidity of the tapered roller bearing 10 can be enhanced, so that it is less deformed when subjected to load.

[0036] See also Figure 2 In one embodiment, a protrusion 700 is provided on the side of the bearing inner ring 200 opposite to the bearing outer ring 300, and the protrusion 700 is distributed along the circumference of the bearing inner ring 200. The protrusion 700 can reduce the axial movement of the tapered roller 400, prevent the tapered roller 400 from moving unnecessarily during operation, and thus ensure that the tapered roller 400 rolls smoothly in the raceway.

[0037] See also Figures 2 to 7The operating principle of the tapered roller bearing 10 of the present application is as follows: when the tapered roller 400 enters the load-bearing area of ​​the tapered roller bearing 10, due to the driving effect of the friction between the raceways, the revolution speed of the tapered roller 400 is greater than the rotation speed of the tapered roller guide unit 100, and at this time, the tapered roller 400 drives the tapered roller guide unit 100 to operate; when the tapered roller 400 enters the non-load-bearing area of ​​the tapered roller bearing 10, due to the existence of the gap between the tapered roller 400 and the tapered roller guide unit 100, the tapered roller 400 does not bear the load, and its revolution speed decreases. At this time, it is switched to the tapered roller guide unit 100 to drive and guide the tapered roller 400 to move. When the first end ring 120 and the first rib 500 or the second end ring 130 and the second rib 600 are attached to, collided with, or collided, the guide ball converts the sliding friction into rolling friction and plays a buffering role, which can continuously correct the movement of the tapered roller 400. This mixed guiding method can reduce the friction, collision and inertia between the tapered roller guide unit 100 and the tapered roller 400, and can reduce the possibility of serious friction, wear, temperature rise, burning, deformation, vibration, noise and even failure of the tapered roller bearing 10. Furthermore, the magnetic strips on both sides of the tapered roller guide unit 100 can absorb the lubricating oil or tiny metal impurities generated during the friction process, purify the working environment of the tapered roller bearing 10, greatly reduce the early failure of the tapered roller bearing 10, and increase the service life of the tapered roller bearing 10.

[0038] In the tapered roller guide unit of the present invention, a plurality of limiting bodies are distributed along the circumference, one end of the limiting body is fixedly connected to the first end ring, the other end of the limiting body is fixedly connected to the second end ring, a plurality of pockets adapted to the tapered roller are formed between adjacent limiting bodies, and at least two contact portions are formed between each limiting body and the same tapered roller, and along the radial direction of the first end ring, the two contact portions are respectively located on the inner side and the outer side of the center circle of the plurality of pockets. The gap between the tapered roller and the limiting body can be effectively reduced, and the influence caused by material deformation can be reduced. The tapered roller bearing of the present application has a first guide ball arranged in the self-locking hole on the side of the first end ring away from the limiting body, and a second guide ball arranged in the self-locking hole on the side of the second end ring away from the limiting body. The guide ball rotates freely in the self-locking hole, and the first rib cooperates with the first guide ball, and the second rib cooperates with the second guide ball, which can reduce the wear of the first end ring and the second end ring when the guide unit moves, and has a certain buffering effect, which can correct the movement of the tapered roller, effectively improve the rotation accuracy of the tapered roller, enhance the carrying capacity of the tapered roller bearing, reduce vibration and noise, and make the equipment run more smoothly and quietly. Therefore, the present invention effectively overcomes some practical problems in the prior art and has a high utilization value and use significance.

[0039] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the art may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by a person of ordinary skill in the art without departing from the spirit and technical concept disclosed by the present invention shall still be covered by the claims of the present invention.

Claims

1. A tapered roller guide unit (100), characterized in that: include: A plurality of limiting bodies (110), wherein the plurality of limiting bodies (110) are distributed along a circumference, and a plurality of pockets (111) adapted to the tapered roller (400) are formed between adjacent limiting bodies (110); A first end ring (120) is arranged at one end of the limiting body (110) and is fixedly connected to the limiting body (110); A second end ring (130) is coaxial with the first end ring (120) and is fixed to the other end of the limiting body (110); At least two contact portions (1111) are formed between each of the limiting bodies (110) and the same tapered roller (400), and along the radial direction of the first end ring (120), the two contact portions (1111) are respectively located on the inner side and the outer side of the center circle (1112) of the plurality of pockets (111).

2. The tapered roller guide unit (100) according to claim 1, characterized in that The limiting body (110) comprises a first blocking piece (112), a second blocking piece (113) and a third blocking piece (114); the first blocking piece (112) is arranged on the center circle (1112), the second blocking piece (113) is arranged on the outside of the center circle (1112), and the third blocking piece (114) is arranged on the inside of the center circle (1112).

3. The tapered roller guide unit (100) according to claim 2, characterized in that The tangent angle θ1 between the contact point of the tapered roller (400) and the second baffle (113) is equal to the tangent angle θ2 between the contact point of the tapered roller (400) and the third baffle (114).

4. The tapered roller guide unit (100) according to claim 1, characterized in that A first self-locking hole (121) is provided on the side of the first end ring (120) facing away from the limiting body (110), and a first guide ball (122) is provided in the first self-locking hole (121), and the first guide ball (122) is higher than the surface of the first end ring (120).

5. The tapered roller guide unit (100) according to claim 1, characterized in that A second self-locking hole (131) is provided on the side of the second end ring (130) facing away from the limiting body (110), and a second guide ball (132) is provided in the second self-locking hole (131), and the second guide ball (132) is higher than the surface of the second end ring (130).

6. The tapered roller guide unit (100) according to claim 1, characterized in that A first groove (123) is provided at one end of the first end ring (120) facing away from the second end ring (130), and a first magnetic strip (124) is fixedly provided in the first groove (123), and a surface of the first magnetic strip (124) is lower than a surface of the first end ring (120).

7. The tapered roller guide unit (100) according to claim 1, characterized in that A second groove (133) is provided at one end of the second end ring (130) facing away from the first end ring (120), and a second magnetic strip (134) is fixedly provided in the second groove (133), and the surface of the second magnetic strip (134) is lower than the surface of the second end ring (130).

8. A tapered roller bearing (10), characterized in that: The invention comprises a bearing inner ring (200), a bearing outer ring (300), a tapered roller (400) and a tapered roller guide unit (100) according to any one of claims 1 to 7, wherein the bearing outer ring (300) is sleeved outside the bearing inner ring (200), the tapered roller guide unit (100) is arranged between the bearing outer ring (300) and the bearing inner ring (200), and the tapered roller (400) is arranged in a pocket (111) of the tapered roller guide unit (100).

9. The tapered roller bearing (10) according to claim 8, characterized in that: The tapered roller bearing (10) further comprises a first rib (500) and a second rib (600), wherein the first rib (500) is fixedly arranged on the same side of the first end ring (120), and the second rib (600) is fixedly arranged on the same side of the second end ring (130).

10. The tapered roller bearing (10) according to claim 9, characterized in that: The first rib (500) is an annular shape coaxial with the bearing inner ring (200), and the outer edge of the first rib (500) is fixedly connected to one end of the bearing outer ring (300); the second rib (600) is an annular shape coaxial with the bearing inner ring (200), and the outer edge of the second rib (600) is fixedly connected to the other end of the bearing outer ring (300).

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