Unitized variable direction self-aligning bearing

Abstract

The utility model belongs to the technical field of self -aligning ball bearing, and disclose an integral type changes direction self -aligning bearing, including the axle outer ring, the spherical raceway is established in the axle outer ring inner ring side, the threaded groove is established in the axle outer ring outside, the axle inner ring, the deep groove raceway is established in the axle inner ring outer ring side symmetry, rolling assembly, the rolling assembly includes the retainer. The utility model through the screw pair cooperation of inner thread rotating ring and threaded groove, the guiding effect of connecting sliding block and limiting sliding slot is combined, converts into accurate axial adjustment from the rotary motion, makes the self -aligning bearing of traditional self -aligning bearing accuracy low, the amplitude is not controllable problem, the moving distance of connecting sliding block and the adjustment eccentric distance direct correspondence, further guarantees the self -aligning accuracy, is applicable to the equipment scene of the higher requirement of rotation accuracy.

Description

Technical Field

[0001] This utility model belongs to the field of self-aligning ball bearing technology, specifically an integrated variable direction self-aligning bearing. Background Technology

[0002] Self-aligning ball bearings (also known as self-aligning ball bearings) are rolling bearings with a spherical outer ring raceway. They have an automatic self-aligning function and can compensate for errors caused by shaft deflection or different axial alignment of the bearing housing bore.

[0003] The self-aligning principle of a self-aligning ball bearing is that when the shaft deflects or is misaligned during installation, the inner ring, steel balls, and cage can automatically deflect within the outer ring of the spherical surface. The relative tilt angle between the inner and outer rings is allowed to not exceed 3 degrees, and the bearing can still work normally. This effectively compensates for the angular error between the shaft and the bearing housing, and avoids edge contact and stress concentration.

[0004] In actual use, users often use large self-aligning bearings as universal compensators for applications where the alignment range far exceeds the design limits. When the self-aligning range is large, the inner ring needs to deflect synchronously with the shaft. However, traditional inner rings and shafts are mostly cylindrical interference fits without a guiding structure, which leads to uneven force on the mating surfaces of the inner ring and the journal during deflection, resulting in skewed deflection. This makes it impossible for the bearing to fully compensate for the deviation and thus unable to adapt. In view of this, an integrated directional self-aligning bearing is proposed to solve the above problems. Utility Model Content

[0005] To address the problems mentioned in the background art, this utility model provides an integrated self-aligning bearing with variable direction.

[0006] To achieve the above objectives, this utility model provides the following technical solution: an integrated self-aligning bearing with variable direction, comprising an outer ring, a spherical raceway on the inner ring side of the outer ring, a threaded groove on the outer ring side of the outer ring, an inner ring, deep groove raceways symmetrically formed on the outer ring side of the inner ring, a rolling assembly, the rolling assembly comprising a cage, a plurality of balls rotatably arranged on the inner side of the cage, the plurality of balls being arranged in two rows in a cross-ring array, an internal threaded rotating ring, the threaded rotating ring being arranged on the outer side of the threaded groove, wherein a convex ring is fixedly provided on the outer ring side of the cage between the two rows of balls, a plurality of limiting grooves are formed in a ring array on the outer side of the threaded groove, a wrapping groove is formed on the inner ring side of the internal threaded rotating ring, a wrapping ring is rotatably provided on the inner side of the wrapping groove, a connecting slider is fixedly provided on the inner side of the wrapping ring corresponding to the limiting groove, and an adjusting member is fixedly connected to the bottom of each of the plurality of connecting sliders, the adjusting member being located above the convex ring and having an equidistant height, and being in a wrapping position to the convex ring.

[0007] Preferably, the threaded groove is provided with symmetrical storage grooves on both sides, and the internal threaded rotating ring is provided with symmetrical protective rings on both sides, and the protective rings are slidably positioned inside the storage grooves.

[0008] Preferably, the adjusting member is an equidistant structure larger than the convex ring.

[0009] Preferably, both the convex ring and the adjusting member are tapered structures, and the top two sides of the convex ring and the inner wall two sides of the adjusting member are rounded.

[0010] Preferably, the moving distance of the connecting slider within the limiting groove is the eccentric distance between the adjusting member and the convex ring.

[0011] Preferably, the length of the protective ring is greater than the distance inside the storage groove.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows: This invention utilizes the helical pair between the internal threaded rotating ring and the threaded groove, combined with the guiding effect of the connecting slider and the limiting groove, to transform rotational motion into precise axial adjustment. This allows the self-aligning amplitude to be precisely controlled by the rotation angle of the internal threaded rotating ring, solving the problems of low self-aligning accuracy and uncontrollable amplitude in traditional self-aligning bearings. The moving distance of the connecting slider directly corresponds to the adjustment eccentricity distance, further ensuring self-aligning accuracy. It is suitable for equipment scenarios with high requirements for rotational accuracy. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the orthographic section of this utility model; Figure 3 for Figure 2 Enlarged view of point A; Figure 4 This is a schematic diagram of the wrapping ring structure of this utility model.

[0014] In the diagram: 1. Outer ring of shaft; 11. Threaded groove; 12. Limiting groove; 13. Receiving groove; 2. Inner ring of shaft; 3. Rolling assembly; 31. Cage; 32. Ball; 33. Convex ring; 4. Internal thread rotating ring; 41. Enclosing ring; 42. Connecting slider; 43. Adjusting component; 44. Protective ring. Detailed Implementation

[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0016] like Figures 1 to 4As shown, this utility model provides an integrated reversible self-aligning bearing, including an outer ring 1, an inner ring 2, a rolling assembly 3, and an internally threaded rotating ring 4. The outer ring 1 has a spherical raceway on its inner ring side and a threaded groove 11 on its outer ring side. The inner ring 2 has symmetrically formed deep groove raceways on its outer ring side. The rolling assembly 3 includes a cage 31, with a plurality of balls 32 rotatably arranged inside the cage 31. These balls 32 are arranged in two rows in a cross-ring array. The internally threaded rotating ring 4 is rotatably disposed outside the threaded groove 11. The outer ring side of the cage 31 is located between the two rows of balls. A convex ring 33 is fixedly provided between 32. Several limiting slide grooves 12 are arranged in a ring array on the outer side of the threaded groove 11. A wrapping groove is provided on the inner ring side of the internal threaded rotating ring 4. A wrapping ring 41 is rotatably provided on the inner side of the wrapping groove. A connecting slider 42 is fixedly provided on the inner side of the wrapping ring 41 corresponding to the limiting slide groove 12. Adjusting components 43 are fixedly connected to the bottom of several connecting sliders 42. The adjusting components 43 are located above the convex ring 33 and have equal height, and are in the wrapping position of the convex ring 33. The moving distance of the connecting slider 42 in the limiting slide groove 12 is the eccentric distance between the adjusting component 43 and the convex ring 33.

[0017] When the shaft system experiences eccentric deflection due to installation errors, load fluctuations, or vibration, the bearing needs to adjust its structure to eliminate the influence of eccentric force on operation. This can be achieved by rotating the internal thread rotating ring 4, which forms a helical pair with the threaded groove 11 of the outer ring 1 of the shaft through its internal thread. During rotation, axial displacement occurs along the threaded groove 11. Since a retaining ring 41 is rotatably installed in the retaining groove of the inner ring of the internal thread rotating ring 4, and the retaining ring 41 forms a sliding fit with the limiting groove 12 of the outer ring 1 of the shaft through the connecting slider 42, the connecting slider 42 is restricted by the limiting groove 12 to move only axially. Therefore, the rotational motion of the internal thread rotating ring 4 is converted into the axial linear motion of the retaining ring 41 and the connecting slider 42. The adjusting member 43 at the bottom of the connecting slider 42 and the convex ring 33 of the retainer 31 are kept at the same height and in the wrapped position. When the adjusting member 43 moves axially with the connecting slider 42, it will adjust the interval distance between it and the convex ring 33. Since the retainer 31 forms a floating fit with the inner ring 2 and the outer ring 1 of the shaft through the ball 32, the axial force on the convex ring 33 will drive the retainer 31 and the ball 32 to deflect as a whole, so that the ball 32 is repositioned in the spherical raceway of the outer ring 1, thereby driving the inner ring 2 of the shaft to adjust the center position synchronously with the rotating shaft, realizing the self-aligning function. At this time, the adjustment of the interval distance between the adjusting member 43 and the convex ring 33 can limit the overall offset of the inner ring 2 of the shaft, and realize effective control of the self-aligning amplitude.

[0018] like Figure 3 As shown, the threaded groove 11 has symmetrically opened storage grooves 13 on both sides, and the internal threaded rotating ring 4 has symmetrically fixed protective rings 44 on both sides. The protective rings 44 are limited and slidably arranged inside the storage grooves 13, and the length of the protective rings 44 is greater than the distance inside the storage grooves 13.

[0019] When the internal thread rotating ring 4 is rotated, the receiving grooves 13 on both sides of the thread groove 11 on the outer ring 1 of the shaft and the protective rings 44 on both sides of the internal thread rotating ring 4 form a sliding seal structure. The protective rings 44 are always limited to sliding inside the receiving grooves 13, and the length of the protective rings 44 is greater than the distance inside the receiving grooves 13. This ensures that during the bearing self-aligning or the movement of the internal thread rotating ring 4, the thread groove 11 is always completely covered by the protective rings 44, preventing external dust and impurities from entering the bearing and affecting the operation of the rolling assembly 3.

[0020] like Figure 3 As shown, the adjusting member 43 is equidistant from the convex ring 33. Both the convex ring 33 and the adjusting member 43 are tapered, and the top two sides of the convex ring 33 and the inner wall two sides of the adjusting member 43 are rounded.

[0021] The tapered structure and rounded corner design of the adjusting component 43 and the convex ring 33 effectively disperse the contact stress during the adjustment process, avoiding component wear caused by local stress concentration. At the same time, the guiding effect of the tapered structure makes the adjustment action smoother, reduces mechanical jamming and hard friction during the adjustment process, and extends the service life of the rolling assembly 3 and the adjusting component. The wrapping effect of the adjusting component 43 on the convex ring 33 makes the cage 31 more evenly stressed, preventing premature failure of the ball 32 due to uneven stress caused by the cage 31 shifting.

[0022] Working principle and usage process of this utility model: When the shaft system experiences eccentric deflection due to installation errors, load fluctuations, or vibration, the bearing needs to adjust its structure to eliminate the influence of eccentric force on operation. This can be achieved by rotating the internal thread rotating ring 4, which forms a helical pair with the threaded groove 11 of the outer ring 1 of the shaft through its internal thread. During rotation, axial displacement occurs along the threaded groove 11. Because a retaining ring 41 is rotatably installed in the retaining groove of the inner ring of the internal thread rotating ring 4, and the retaining ring 41 forms a sliding fit with the limiting groove 12 of the outer ring 1 of the shaft through the connecting slider 42, the connecting slider 42 is restricted by the limiting groove 12 to move only axially. The rotational motion of the internal threaded rotating ring 4 is converted into the axial linear motion of the wrapping ring 41 and the connecting slider 42. The adjusting member 43 at the bottom of the connecting slider 42 maintains an equidistant height with the convex ring 33 of the retainer 31 and is in the wrapping position. When the adjusting member 43 moves axially with the connecting slider 42, it adjusts the gap distance between itself and the convex ring 33. Since the retainer 31 forms a floating fit with the inner ring 2 and the outer ring 1 of the shaft through the balls 32, the axial force on the convex ring 33 will cause the retainer 31 and the balls 32 to deflect as a whole, so that the balls 32 are repositioned in the spherical raceway of the outer ring 1, thereby causing the inner ring 2 and the outer ring 1 to rotate. The rotating shaft synchronously adjusts its center position to achieve self-aligning. At this time, the interval between the adjusting component 43 and the convex ring 33 is adjusted to limit the overall offset of the inner ring 2 of the shaft, thereby effectively controlling the self-aligning amplitude. When rotating the internal thread rotating ring 4, the receiving grooves 13 on both sides of the thread groove 11 on the outer ring 1 of the shaft and the protective rings 44 on both sides of the internal thread rotating ring 4 form a sliding seal structure. The protective rings 44 are always limited to sliding inside the receiving grooves 13, and the length of the protective rings 44 is greater than the inner distance of the receiving grooves 13, ensuring that the thread groove 11 is always protected by the protective rings 44 during bearing self-aligning or the movement of the internal thread rotating ring 4. Complete coverage prevents external dust and impurities from entering the bearing and affecting the operation of the rolling assembly 3. The conical structure and rounded corner design of the adjusting component 43 and the convex ring 33 effectively disperse the contact stress during the adjustment process, avoiding component wear caused by local stress concentration. At the same time, the guiding effect of the conical structure makes the adjustment action smoother, reduces mechanical jamming and hard friction during the adjustment process, and extends the service life of the rolling assembly 3 and the adjusting component. The wrapping effect of the adjusting component 43 on the convex ring 33 makes the cage 31 more evenly stressed, preventing premature failure of the ball 32 due to uneven stress caused by cage 31 offset.

[0023] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0024] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An integrated reversible self-aligning bearing, characterized in that, include: The outer ring (1) of the shaft has a spherical raceway on the inner ring side and a threaded groove (11) on the outer side. The inner ring (2) of the shaft has deep groove raceways symmetrically opened on the outer ring side; The rolling assembly (3) includes a retainer (31), and a plurality of balls (32) are rotatably arranged inside the retainer (31). The plurality of balls (32) are divided into two columns and arranged in a cross-ring array. The internal thread rotating ring (4) is located outside the thread groove (11); Among them, the outer ring of the retainer (31) is fixedly provided with a convex ring (33) between two rows of balls (32), the outer side of the threaded groove (11) is provided with a number of limiting slide grooves (12) in a ring array, the inner ring of the internal thread rotating ring (4) is provided with a wrapping groove, the inner side of the wrapping groove is provided with a wrapping ring (41), the inner side of the wrapping ring (41) is fixedly provided with a connecting slider (42) corresponding to the limiting slide groove (12), and the bottom of the connecting sliders (42) is fixedly connected with an adjusting member (43). The adjusting member (43) is located above the convex ring (33) and has an equidistant height, and is in the wrapping position of the convex ring (33).

2. The integrated reversing self-aligning bearing according to claim 1, characterized in that: The threaded groove (11) has symmetrically opened storage grooves (13) on both sides, and the internal threaded rotating ring (4) has symmetrically fixed protective rings (44) on both sides. The protective rings (44) are limited and slidably arranged inside the storage grooves (13).

3. The integrated reversing self-aligning bearing according to claim 1, characterized in that: The adjusting member (43) is configured with an equidistant structure larger than the convex ring (33).

4. The integrated reversing self-aligning bearing according to claim 3, characterized in that: Both the convex ring (33) and the adjusting member (43) are tapered structures, and the top two sides of the convex ring (33) and the inner walls of the adjusting member (43) are rounded.

5. The integrated reversing self-aligning bearing according to claim 1, characterized in that: The distance the connecting slider (42) moves within the limiting groove (12) is the eccentric distance between the adjusting member (43) and the convex ring (33).

6. The integrated reversing self-aligning bearing according to claim 2, characterized in that: The length of the protective ring (44) is greater than the distance inside the storage groove (13).

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