CN-117183625-B - High-load shearing-resistant omni-wheel bearing assembly

CN117183625BCN 117183625 BCN117183625 BCN 117183625BCN-117183625-B

Abstract

The invention discloses a high-load shearing-resistant omni-wheel bearing assembly, and relates to the technical field of bearings. The double-layer omni-directional wheel comprises two layers of hubs, driven rollers are uniformly distributed on each layer of hub along the circumferential direction, the driven rollers on the two layers of hubs are sequentially staggered, a supporting shaft is coaxially and fixedly arranged in the middle of the double-layer omni-directional wheel in a penetrating mode, the supporting shaft is arranged in the left-right direction, supporting bases are respectively arranged at the left end and the right end of the supporting shaft, mounting through holes are formed in the supporting bases in the left-right direction, the mounting through holes are coaxially sleeved outside the supporting shaft, a first bearing module is arranged at the left side inside the mounting through holes, and a second bearing module is arranged at the right side inside the mounting through holes. The double-layer omni-directional wheel has the beneficial effects that when the load bearing center is changed back and forth due to the fact that the double-layer omni-directional wheel bears the load, the problem of shearing impact on the bearing is effectively solved, the service life of the bearing is prolonged, and the working reliability is enhanced.

Inventors

ZHU JIAXUAN
YANG SHENG

Assignees

哈尔滨理工大学威海研究院

Dates

Publication Date: 20260505
Application Date: 20230619

Claims (4)

1. The high-load shearing-resistant omni-wheel bearing assembly comprises a double-layer omni-wheel (1), wherein the double-layer omni-wheel (1) comprises two layers of hubs (2), driven rollers (3) are uniformly distributed on each layer of hubs (2) along the circumferential direction, the driven rollers (3) on the two layers of hubs (2) are sequentially staggered, and the high-load shearing-resistant omni-wheel bearing assembly is characterized in that a supporting shaft (4) is coaxially and fixedly penetrated in the middle of the double-layer omni-wheel (1), the supporting shaft (4) is arranged along the left-right direction, supporting bases (5) are respectively arranged at the left end and the right end of the supporting shaft (4), mounting through holes (6) are formed in the supporting base (5) along the left-right direction, the mounting through holes (6) are sleeved outside the supporting shaft (4) in the same way, a first bearing module is arranged at the left side inside the mounting through holes (6), and a second bearing module is arranged at the right side inside the mounting through holes (6), and when the double-layer omni-wheel driven rollers (3) alternately touch the ground; The first bearing modules comprise first load bearings (7) which are uniformly distributed on the periphery of a supporting shaft (4) along the circumferential direction, the first load bearings (7) are respectively connected with a supporting base (5) through A bearing seats (8), the outer walls of the first load bearings (7) are in rolling correspondence with the outer walls of the supporting shaft (4), the number of the first load bearings (7) on each first bearing module is consistent with the number of driven rollers (3) on a single-layer hub (2), the distance from a left side first load bearing (7) to the left side hub (2) is consistent with the distance from a right side first load bearing (7) to the left side hub (2), first longitudinal sections (9) are uniformly distributed on the left side and the right side of the supporting shaft (4) along the circumferential direction, the number of the first longitudinal sections (9) on the left side is consistent with the number of the first longitudinal sections (9) on the right side and is equal to the number of the driven rollers (3) on the single-layer hub (2), and the sum of circle center angle degrees corresponding to all the first longitudinal sections (9) is 360 degrees; The second bearing module comprises second load bearings (10) which are uniformly distributed on the periphery of a supporting shaft (4) along the circumferential direction, wherein the second load bearings (10) are respectively connected with a supporting base (5) through B bearing seats (11), the outer walls of the second load bearings (10) are in rolling correspondence with the outer walls of the supporting shaft (4), the number of the second load bearings (10) on each second bearing module is consistent with the number of driven rollers (3) on a single-layer hub (2), the distance from the left second load bearing (10) to the right hub (2) is consistent with the distance from the right second load bearing (10) to the right hub (2), second longitudinal sections (12) are uniformly distributed on the left side and the right side of the supporting shaft (4) along the circumferential direction, the number of the second longitudinal sections (12) on the left side is consistent with the number of the second longitudinal sections (12) on the right side and is equal to the number of the driven rollers (3) on the single-layer hub (2), and the sum of circle center angle degrees corresponding to all the second longitudinal sections (12) is 360 degrees; When the driven roller (3) on the left side hub (2) bears load, the first load bearing (7) is in rolling friction with the outer wall of the supporting shaft (4), the second load bearing (10) is in one-to-one alignment with the second longitudinal section (12), and when the driven roller (3) on the right side hub (2) bears load, the second load bearing (10) is in rolling friction with the outer wall of the supporting shaft (4), and the first load bearing (7) is in one-to-one alignment with the first longitudinal section (9).
2. The high load shear resistant omni wheel bearing assembly according to claim 1, wherein the outer wall of the support shaft (4) is uniformly coated with a wear resistant coating.
3. The high-load shearing-resistant omni-wheel bearing assembly according to claim 2, wherein the first load bearing (7) and the second load bearing (10) which are positioned in the same supporting base (5) are in one-to-one correspondence in the left-right direction, and the first longitudinal section (9) and the second longitudinal section (12) which are positioned at the same end part of the supporting shaft (4) are sequentially staggered.
4. The high-load shearing-resistant omni-wheel bearing assembly according to claim 2, wherein the first load bearing (7) and the second load bearing (10) which are positioned in the same supporting base (5) are sequentially staggered, and the first longitudinal section (9) and the second longitudinal section (12) which are positioned at the same end part of the supporting shaft (4) are in one-to-one correspondence in the left-right direction.

Description

High-load shearing-resistant omni-wheel bearing assembly Technical Field The invention relates to the technical field of bearings, in particular to a high-load shearing-resistant omni-wheel bearing assembly. Background Because the omni-wheel has the capability of moving in multiple directions, the omni-wheel is often used in occasions with limited space and high mobility requirements on a platform, however, the driven rollers distributed on the hub of the omni-wheel are not strictly circular, and a large gap exists between the driven rollers, that is, when an object is conveyed in a rolling way, the contact point between the single-layer omni-wheel and the object is not strictly distributed on a circular track, so that large shaking can be generated, two-layer hubs are usually adopted at present, so that 'vacancy' complementation is formed between the two-layer driven rollers, and the radial shaking problem caused by the gap is reduced. Through the complementation of two omni wheels, the problem of radial shake can be solved, but due to the staggered arrangement of the driven rollers on the double-layer omni wheels, the contact point with the ground can be changed back and forth above the two-layer omni wheels, the effect on the supporting shaft of the omni wheels is shown as the fact that the bearing center on the supporting shaft is changed back and forth, the axial swing shake of the omni wheels can be caused, the effect on the bearings at the two ends of the supporting shaft is shown as repeated shearing impact on the bearings. Under small high load conditions, such as heavy load cargo haulers in workshops, unmanned forklifts, which require high heavy load performance and high flexibility, can use double-layer omni-wheels as tires. Compared with the traditional tire, the omnidirectional wheel has no inflatable structure, so that the shock absorption capacity is weak, and the omnidirectional wheel set has the characteristics of radial shake and axial swing, so that the omnidirectional wheel set has very strict requirements on impact resistance and shearing resistance of a supporting shaft and a bearing under the heavy load condition. Disclosure of Invention The invention aims to solve the technical problems, and provides a high-load shearing-resistant omni-wheel bearing assembly which can relieve the problem of reciprocating shearing impact on a bearing and a supporting shaft when a bearing center is changed back and forth due to the fact that a double-layer omni-wheel bears load, so that the service life of the bearing is prolonged, and the working reliability is enhanced. The technical scheme includes that the high-load shearing-resistant omni-wheel bearing assembly comprises two layers of hubs, driven rollers are uniformly distributed on each layer of hub along the circumferential direction, the driven rollers on the two layers of hubs are sequentially arranged in a staggered mode, a supporting shaft is coaxially and fixedly arranged in a penetrating mode in the middle of the two layers of hubs, the supporting shaft is arranged in the left-right direction, supporting bases are respectively arranged at the left end and the right end of the supporting shaft, mounting through holes are formed in the supporting base in the left-right direction, the mounting through holes are coaxially sleeved outside the supporting shaft, a first bearing module is arranged at the left side inside the mounting through holes, a second bearing module is arranged at the right side inside the mounting through holes, and when the driven rollers of the two layers of omni-wheels alternately touch the ground, the supporting shaft is alternately contacted with the first bearing module and the second bearing module. According to the technical scheme, the first bearing modules comprise first load bearings which are uniformly distributed on the periphery of a supporting shaft along the circumferential direction, the first load bearings are respectively connected with a supporting base through bearing seats A, the outer wall of each first load bearing module corresponds to the outer wall of the supporting shaft in a rolling way, the number of the first load bearings on each first bearing module is consistent with that of driven rollers on a single-layer hub, the distance from a left first load bearing to the left hub is consistent with that from a right first load bearing to the left hub, first longitudinal sections are uniformly distributed on the left side and the right side of the supporting shaft along the circumferential direction respectively, the number of the first longitudinal sections on the left side is consistent with that of the first longitudinal sections on the right side and equal to that of the driven rollers on the single-layer hub, and the sum of circle center angle numbers corresponding to all the first longitudinal sections is 360 degrees; the second bearing modules comprise second load bearings which are uniformly