CN216975501U - Bearing assembly and planet bearing assembly - Google Patents

Abstract

The utility model relates to the technical field of bearings, and particularly discloses a bearing assembly and a planetary bearing assembly, wherein the bearing assembly comprises a rotating shaft, a rotating member and a rolling element assembly, wherein a first limiting piece and a second limiting piece are arranged at two ends of the rotating shaft; the rotating piece is provided with a through hole, the rotating shaft penetrates through the through hole, and the rotating piece is positioned between the first limiting piece and the second limiting piece; the rolling element assembly comprises a first limiting ring, a second limiting ring and a plurality of rolling elements, the rolling elements are located in the through hole and are annularly arranged along the outer peripheral surface of the rotating shaft, the rolling elements are in clearance fit with the rotating shaft and the rotating member respectively along the radial direction, the first limiting ring and the second limiting ring are fixedly arranged at two ends of the through hole at intervals along the axis direction of the rotating member, the first limiting ring is in clearance fit with the first limiting member and the rolling element respectively, and the second limiting ring is in clearance fit with the second limiting member and the rolling element respectively. The assembly realizes the relative rotation without the inner ring and the outer ring between the rotating part and the rotating shaft, and prevents the rolling body and the rotating part from greatly shifting along the axial direction of the rotating shaft.

Description

Bearing assembly and planet bearing assembly

Technical Field

The utility model relates to the technical field of bearings, in particular to a bearing assembly and a planetary bearing assembly.

Background

The planetary gear box has high transmission power, large transmission torque and large transmission ratio range, and is widely applied to mechanical transmission. The planet component of the existing planetary gearbox generally adopts a standard cylindrical roller bearing (also adopts a self-aligning bearing) to be sleeved on a planet pin shaft; the standard bearing consists of an inner ring, an outer ring, rollers and a retainer.

The standard bearing has a complex structure and large occupied space, when the speed ratio of the planetary gear box is smaller, the number of teeth of the planetary gear is smaller, the outer diameter of the planetary gear is reduced, the aperture for installing the planetary bearing is also reduced, when the speed ratio is reduced to be below 4, the performance of the standard bearing can not meet the performance requirement of the gear, even no bearing is available, and the planetary bearing becomes a short plate in the planetary gear transmission.

SUMMERY OF THE UTILITY MODEL

The utility model aims to: the bearing assembly and the planet bearing assembly are provided to solve the problems that a standard bearing in the related technology occupies a large space and cannot meet the assembly requirements of a planet carrier and a planet gear.

In one aspect, the present invention provides a bearing assembly comprising:

the device comprises a rotating shaft, a first limiting piece and a second limiting piece are arranged at two ends of the rotating shaft;

the rotating part is provided with a through hole, the rotating shaft penetrates through the through hole, and the rotating part is positioned between the first limiting part and the second limiting part;

the rolling element subassembly, the rolling element subassembly includes first spacing ring, second spacing ring and a plurality of rolling element, and is a plurality of the rolling element is located in the through-hole and follow the outer peripheral face annular of pivot is arranged, the rolling element along radially respectively with the pivot with rotate a clearance fit, every the axis of rolling element with the pivot is parallel, first spacing ring with the second spacing ring is followed the axis direction interval of rotating the piece set firmly in the both ends of through-hole, first spacing ring respectively with first locating part with rolling element clearance fit, the second spacing ring respectively with the second locating part with rolling element clearance fit.

As the preferred technical scheme of the bearing assembly, the first limiting ring and the second limiting ring are in interference fit with the hole wall of the through hole respectively.

As a preferred technical scheme of the bearing assembly, the first limit ring and the second limit ring are both stepped rings, the first limit ring is inserted into the through hole and is in interference fit with the hole wall of the through hole, and the part of the first limit ring outside the through hole is abutted against the rotating part;

the second limiting ring is inserted into the through hole and is in interference fit with the hole wall of the through hole, and the part, located outside the through hole, of the second limiting ring is abutted to the rotating piece.

As a preferred technical solution of the bearing assembly, the rotating shaft sequentially penetrates through the first limiting part and the second limiting part, and the first limiting part and the second limiting part are respectively and fixedly connected with the rotating shaft.

As a preferred technical scheme of the bearing assembly, a plurality of first oil grooves are formed in the surface of the first limiting ring opposite to the first limiting member at intervals along the radial direction of the surface;

and a plurality of second oil grooves are formed in the surface, opposite to the second limiting part, of the second limiting ring at intervals along the radial direction of the second limiting ring.

As a preferred technical solution of the bearing assembly, the first position limiting member is sleeved on one end of the rotating shaft and is fixedly connected with the rotating shaft;

the second limiting part is a boss convexly arranged at the other end of the rotating shaft.

As a preferred technical scheme of the bearing assembly, the first limiting ring and the rotating shaft are arranged at intervals, and a plurality of first oil grooves are arranged on the surface of the first limiting ring opposite to the first limiting member at intervals along the radial direction of the surface;

the second limiting ring is in clearance fit with the rotating shaft, a plurality of through holes are formed in the second limiting ring at intervals, and the through holes are communicated with the outside through the through holes respectively.

As a preferable embodiment of the bearing assembly, the plurality of rolling elements are arranged in a plurality of turns around the outer circumferential surface of the rotating shaft.

As a preferred technical scheme of the bearing assembly, an oil passage is arranged in the rotating shaft, and the oil passage sends lubricating oil to a position between the rolling body and the rotating shaft.

In another aspect, the present invention provides a planet bearing assembly comprising a bearing assembly according to any of the preceding aspects.

The utility model has the beneficial effects that:

the utility model provides a bearing assembly, which comprises a rotating shaft, a rotating part and a rolling element assembly, wherein a first limiting part and a second limiting part are arranged at two ends of the rotating shaft; the rotating piece is provided with a through hole, the rotating shaft penetrates through the through hole, and the rotating piece is positioned between the first limiting piece and the second limiting piece; the rolling element assembly comprises a first limiting ring, a second limiting ring and a plurality of rolling elements, the rolling elements are located in the through holes and are annularly arranged along the outer peripheral face of the rotating shaft, the rolling elements are in clearance fit with the rotating shaft and the rotating part along the radial direction respectively, the axis of each rolling element is parallel to the rotating shaft, the first limiting ring and the second limiting ring are fixedly arranged at two ends of the through holes at intervals along the axis direction of the rotating part, the first limiting ring is in clearance fit with the first limiting part and the rolling elements respectively, and the second limiting ring is in clearance fit with the second limiting part and the rolling elements respectively. The first limit ring and the second limit ring of the bearing assembly are fixedly connected with the rotating piece respectively, so that the rolling body can be located in the through hole all the time. Meanwhile, the first limiting part and the second limiting part are respectively matched with the corresponding first limiting ring and the second limiting ring in a clearance fit along the axial direction of the rotating shaft, and therefore the rotating part can be limited from moving along the axial direction of the rotating shaft. Therefore, the bearing assembly can realize the relative rotation between the rotating part and the rotating shaft without the inner ring and the outer ring, saves the installation space, and can prevent the rolling body and the rotating part from greatly shifting along the axial direction of the rotating shaft.

Drawings

FIG. 1 is a schematic structural diagram of a bearing assembly according to a first embodiment of the present invention;

FIG. 2 is a schematic structural diagram of a first retaining ring according to a first embodiment of the present invention;

FIG. 3 is a schematic structural diagram of a second retaining ring according to a first embodiment of the present invention;

fig. 4 is a schematic structural diagram of a bearing assembly according to a second embodiment of the present invention.

In the figure:

11. a rotating shaft; 111. an oil passage; 12. a first limit piece; 13. a second limiting member;

2. a rotating member;

31. a rolling body; 32. a first limit ring; 321. a first oil groove; 33. a second stop collar; 331. a through hole; 332. and a second oil groove.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Where the terms "first position" and "second position" are two different positions, and where a first feature is "over", "above" and "on" a second feature, it is intended that the first feature is directly over and obliquely above the second feature, or simply means that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.

Example one

As shown in fig. 1, the present embodiment provides a bearing assembly, which includes a rotating shaft 11, a rotating member 2 and a rolling element assembly, wherein a first limiting member 12 and a second limiting member 13 are disposed at two ends of the rotating shaft 11; the rotating part 2 is provided with a through hole, the rotating shaft 11 is arranged through the through hole, and the rotating part 2 is positioned between the first limiting part 12 and the second limiting part 13; the rolling element assembly comprises a first limiting ring 32, a second limiting ring 33 and a plurality of rolling elements 31, the plurality of rolling elements 31 are located in the through hole and are annularly arranged along the outer peripheral surface of the rotating shaft 11, the rolling elements 31 are respectively in clearance fit with the rotating shaft 11 and the rotating member 2 along the radial direction, the axis of each rolling element 31 is parallel to the rotating shaft 11, the first limiting ring 32 and the second limiting ring 33 are fixedly arranged at two ends of the through hole at intervals along the axis direction of the rotating member 2, the first limiting ring 32 is respectively in clearance fit with the first limiting member 12 and the rolling elements 31, and the second limiting ring 33 is respectively in clearance fit with the second limiting member 13 and the rolling elements 31. The first limit ring 32 and the second limit ring 33 of the bearing assembly are respectively fixedly connected with the rotating part 2, so that the rolling body 31 can be always positioned in the through hole. Meanwhile, the first limiting member 12 and the second limiting member 13 are respectively in clearance fit with the corresponding first limiting ring 32 and the corresponding second limiting ring 33 along the axial direction of the rotating shaft 11, so that the axial movement of the rotating member 2 along the rotating shaft 11 can be limited. Therefore, the bearing assembly can realize the relative rotation between the rotating part 2 and the rotating shaft 11 without an inner ring and an outer ring, save the installation space, and prevent the rolling body 31 and the rotating part 2 from greatly shifting along the axial direction of the rotating shaft 11.

Optionally, the first limiting ring 32 and the second limiting ring 33 are respectively in interference fit with the hole wall of the through hole. In this embodiment, the first limiting ring 32 and the second limiting ring 33 are respectively inserted into the through hole from two ends of the through hole and are in interference fit with the hole wall of the through hole. In other embodiments, the first position-limiting ring 32 and the second position-limiting ring 33 can be fixed to the rotating member 2 by means of clamping or screwing.

Optionally, the first limiting ring 32 and the second limiting ring 33 are both stepped rings, the first limiting ring 32 is partially inserted into the through hole and is in interference fit with the hole wall of the through hole, and the part of the first limiting ring 32 outside the through hole is abutted against the rotating member 2; the second limiting ring 33 is inserted into the through hole and is in interference fit with the hole wall of the through hole, and the part of the second limiting ring 33, which is positioned outside the through hole, is abutted against the rotating part 2. In this embodiment, the first position-limiting ring 32 and the second position-limiting ring 33 are both provided with a stepped structure, which can prevent the first position-limiting ring 32 and/or the second position-limiting ring 33 from moving relative to the rotating member 2 along the axial direction of the rotating shaft 11.

Optionally, the rotating shaft 11 sequentially penetrates through the first limiting part 12 and the second limiting part 13, and the first limiting part 12 and the second limiting part 13 are respectively fixedly connected to the rotating shaft 11. In this embodiment, the first limiting member 12 and the second limiting member 13 are fixed to each other at an interval, and the first limiting member 12 and the second limiting member 13 are detachably connected to the rotating shaft 11 respectively for facilitating the installation of the rotating member 2, the first limiting ring 32, the second limiting ring 33 and the rolling member 31. In other embodiments, the first limiting member 12 and the second limiting member 13 may also be separately disposed, and further the first limiting member 12 and the second limiting member 13 may be respectively sleeved on the rotating shaft 11 from two ends of the rotating shaft 11.

As shown in fig. 2 and 3, optionally, a plurality of first oil grooves 321 are formed on a surface of the first limiting ring 32 opposite to the first limiting member 12 at intervals along a radial direction thereof; a plurality of second oil grooves 332 are formed in the surface of the second limiting ring 33 opposite to the second limiting member 13 at intervals along the radial direction. In this embodiment, the external lubricating oil may enter the gap between the first limiting ring 32 and the rotating shaft 11 through the first oil groove 321, and then flow into the through hole. Similarly, the external lubricating oil can enter the gap between the second limiting ring 33 and the rotating shaft 11 through the second oil groove 332, and then flow into the through hole.

Alternatively, the plurality of rolling bodies 31 are arranged in a plurality of turns around the outer circumferential surface of the rotating shaft 11. In the present embodiment, the number of turns of the rolling elements 31 is determined according to the length of the rotor 2 in the axial direction thereof and the length of the rolling elements 31 in the axial direction thereof, and preferably, the number of turns of the rolling elements 31 is determined so as to ensure a clearance fit between the rolling elements 31 and the corresponding first and second limit rings 32 and 33, which are respectively opposite to the first and second limit rings 32 and 33. Specifically, the number of turns of the rolling element 31 may be 1 turn, 2 turns, 3 turns, and the like.

Alternatively, the rotor 2 is made of a carburized steel material and the shaft 11 is made of a bearing steel material. In this embodiment, the case hardening steel has the advantages of high wear resistance, high contact stress and impact load, high and uniform hardness and wear resistance, and high elastic limit. Therefore, the rotor 2 and the rotating shaft 11 respectively made of the above two materials have the advantages of high wear resistance, high hardness and long service life.

Alternatively, an oil passage 111 is provided in the rotating shaft 11, and the oil passage 111 sends lubricating oil between the rolling bodies 31 and the rotating shaft 11. In the present embodiment, in order to reduce the frictional wear between the rolling bodies 31 and the rotating shaft 11 and the rotating member 2, the oil passage 111 is provided inside the rotating shaft 11, the oil passage 111 can introduce lubricating oil between the rolling bodies 31 and the rotating shaft 11, and the rolling bodies 31 bring the lubricating oil between the rolling bodies 31 and the rotating member 2 along with the rotation of the rolling bodies 31. And further, frictional wear between the rolling bodies 31 and the rotary shaft 11 and the rotor 2, respectively, can be reduced.

Example two

As shown in fig. 3, the present embodiment is substantially the same as the first embodiment, and the only difference is that the first position-limiting member 12 is sleeved on one end of the rotating shaft 11 and is fixedly connected to the rotating shaft 11; the second limiting member 13 is a boss protruding from the other end of the rotating shaft 11. In this embodiment, the first position-limiting member 12 is detachably and fixedly connected to the rotating shaft 11, and this arrangement can facilitate the assembly and disassembly of the bearing assembly and the rotating member 2.

Preferably, the first limit ring 32 is arranged at an interval with the rotating shaft 11; the second limiting ring 33 is in clearance fit with the rotating shaft 11, and a plurality of first oil grooves 321 are formed in the surface of the first limiting ring 32 opposite to the first limiting part 12 at intervals along the radial direction; the second retainer ring 33 has a plurality of through holes 331 at intervals, and the through holes 331 communicate with the outside. In this embodiment, the height of the first position-limiting member 12 is greater than the distance between the wall of the through hole and the rotating shaft 11. The first limiting ring 32 is spaced from the rotating shaft 11, and since the first limiting ring 32 is radially spaced from the first limiting member 12 by a plurality of first oil grooves 321, the above arrangement is favorable for external lubricating oil to enter the through hole. Because the second position-limiting element 13 is a position-limiting boss protruding from the outer peripheral surface of the rotating shaft 11, the height of the position-limiting boss is smaller than the distance from the wall of the through hole to the rotating shaft 11. The second retainer ring 33 is in a clearance fit with the rotary shaft 11. Although the second limiting member 13 and the second limiting ring 33 are in limiting fit with each other, this embodiment prevents external lubricating oil from entering the through hole from one end where the second limiting ring 33 is disposed, and to solve this problem, the second limiting ring 33 is provided with a plurality of through holes 331, and the plurality of through holes 331 introduce the external lubricating oil into the through hole.

A planet bearing assembly is also provided, which comprises the bearing assembly in the two embodiments. In particular, the rotary member 2 is a planet wheel. As shown in fig. 1, the first limiting member 12 and the second limiting member 13 are fixed to each other at intervals, and this arrangement corresponds to a partial structure of the double-arm carrier. As shown in fig. 4, the first limiting member 12 corresponds to a partial structure of the single-arm carrier.

It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims (10)

1. A bearing assembly, comprising:

the device comprises a rotating shaft (11), wherein a first limiting piece (12) and a second limiting piece (13) are arranged at two ends of the rotating shaft (11);

the rotating part (2) is provided with a through hole, the rotating shaft (11) penetrates through the through hole, and the rotating part (2) is located between the first limiting part (12) and the second limiting part (13);

the rolling element assembly comprises a first limiting ring (32), a second limiting ring (33) and a plurality of rolling elements (31), the plurality of rolling elements (31) are positioned in the through hole and are annularly arranged along the outer peripheral surface of the rotating shaft (11), the rolling bodies (31) are respectively in clearance fit with the rotating shaft (11) and the rotating part (2) along the radial direction, the axis of each rolling body (31) is parallel to the rotating shaft (11), the first limiting ring (32) and the second limiting ring (33) are fixedly arranged at two ends of the through hole at intervals along the axial direction of the rotating piece (2), the first limiting ring (32) is in clearance fit with the first limiting piece (12) and the rolling body (31) respectively, the second limiting ring (33) is in clearance fit with the second limiting piece (13) and the rolling body (31) respectively.

2. The bearing assembly according to claim 1, characterized in that the first and second stop rings (32, 33) are each interference fitted with the bore wall of the through bore.

3. The bearing assembly according to claim 2, characterized in that the first limit ring (32) and the second limit ring (33) are stepped rings, the first limit ring (32) is partially inserted into the through hole and is in interference fit with the hole wall of the through hole, and the part of the first limit ring (32) outside the through hole is abutted against the rotating member (2);

the second limiting ring (33) is inserted into the through hole and is in interference fit with the hole wall of the through hole, and the part, outside the through hole, of the second limiting ring (33) is abutted to the rotating piece (2).

4. The bearing assembly according to claim 1, wherein the rotating shaft (11) sequentially penetrates through the first limiting member (12) and the second limiting member (13), and the first limiting member (12) and the second limiting member (13) are respectively fixedly connected with the rotating shaft (11).

5. The bearing assembly according to claim 4, characterized in that a plurality of first oil grooves (321) are arranged on the surface of the first limiting ring (32) opposite to the first limiting member (12) at intervals along the radial direction;

and a plurality of second oil grooves (332) are formed in the surface, opposite to the second limiting piece (13), of the second limiting ring (33) at intervals along the radial direction of the second limiting piece.

6. The bearing assembly according to claim 1, wherein the first limiting member (12) is sleeved on one end of the rotating shaft (11) and is fixedly connected with the rotating shaft (11);

the second limiting piece (13) is a boss which is convexly arranged at the other end of the rotating shaft (11).

7. The bearing assembly according to claim 6, characterized in that the first position-limiting ring (32) is arranged at a distance from the rotating shaft (11), and a plurality of first oil grooves (321) are arranged at intervals along the radial direction of the first position-limiting ring (32) on the surface opposite to the first position-limiting member (12);

the second limiting ring (33) is in clearance fit with the rotating shaft (11), a plurality of through holes (331) are formed in the second limiting ring (33) at intervals, and the through holes are communicated with the outside through the plurality of through holes (331) respectively.

8. Bearing assembly according to any of claims 1 to 7, wherein a plurality of rolling bodies (31) are arranged in a plurality of turns around the outer circumference of the shaft (11).

9. Bearing assembly according to any of claims 1-7, characterized in that an oil channel (111) is arranged in the shaft (11), which oil channel (111) feeds lubricating oil between the rolling bodies (31) and the shaft (11).

10. A planetary bearing assembly comprising a bearing assembly according to any of claims 1 to 9.

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