CN210623387U - Multi-row combined bearing - Google Patents

Abstract

The utility model discloses a multiseriate combination bearing, including outer loop, ball group and inner ring, adopt at least two rows of ball groups to support between outer loop and the inner ring, the outer loop encloses relatively with the inner ring and closes to form and is used for supplying the rolling passageway that the ball group circumference is rolling, one in outer loop and the inner ring is whole multiseriate combination bearing assembly positioning well-positioned setting element, the other is for being used for packing multiseriate ball into the corresponding rolling passageway position on the setting element respectively and carrying out the closed piece-assembling piece of rolling passageway; the assembling piece is formed by splicing and combining two half unit pieces respectively along the axial direction from two sides of the positioning piece, the positioning piece surrounds the ball group from the radial direction and the axial direction of the ball group at the same time, and the assembling piece surrounds the ball group from the radial direction and the axial direction of the ball group at the same time and is arranged opposite to the positioning piece. The accurate centering positioning assembly and the bidirectional bearing performance similar to the radial direction and the axial direction can be realized.

Description

Multi-row combined bearing

Technical Field

The utility model relates to a ball bearing technical field especially relates to a multiseriate combination bearing.

Background

The double-row deep groove ball bearing adopts a double-row deep groove ball shaft-shaped raceway, the raceway and a steel ball have good tightness, and the double-row deep groove ball bearing can bear radial loads and loads acting in two axial directions within a certain range. The double-row deep groove ball bearing is suitable for being applied to a bearing configuration with insufficient load capacity of a single-row deep groove ball bearing.

However, because two rows of steel balls are required to be loaded into the double-row deep groove ball bearing at the same time, a centering error easily exists, and additional load is generated when the centering error exists between the inner ring and the outer ring of the double-row deep groove ball bearing, so that the load borne by the steel balls and the retainer is increased, and the service life of the whole double-row deep groove ball bearing is shortened. The allowed angle error of a general double-row deep groove ball bearing is only 2 arc minutes, and any larger angle error can cause noise increase and load increase.

In addition, in order to obtain good operation of the double-row deep groove ball bearing, like all ball bearings and roller bearings, it is necessary to withstand a certain minimum load, especially at high speeds or accelerations, or also in operation with rapid changes in the direction of the load, the inertial forces of the balls and the cage and the friction in the lubricant will have a negative effect on the rolling of the bearing, and slide sticking wear and sliding motion wear may occur between the balls and the raceways. In the case of starting at low temperatures or when the grease viscosity is high, a larger minimum load is required. When the double-row deep groove ball bearing bears pure axial line load, the bearing load is in a small range and cannot bear the same radial load.

Other bearings such as double-row tapered roller bearings and double-row angular contact roller bearings also have the problems of centering and axial stress.

SUMMERY OF THE UTILITY MODEL

The utility model provides a multi-row combined bearing, which solves the problem of centering of the prior double-row bearing; and the axial bearing capacity is poor, and the technical problem that the radial acting force can not be born is solved.

According to an aspect of the utility model, a multiseriate combination bearing is provided, including outer loop, ball group and inner ring, adopt at least two rows of ball groups to support between outer loop and the inner ring, the outer loop encloses relatively with the inner ring and constitutes and is used for supplying the rolling passageway of ball group circumference rolling, one in outer loop and the inner ring is whole multiseriate combination bearing assembly positioning well-defined setting element, the other one is for being used for packing into the multiseriate ball respectively the corresponding rolling passageway position on the setting element and carrying out the closed piece-assembling piece of rolling passageway; the assembling piece is formed by splicing and combining two half unit pieces respectively along the axial direction from two sides of the positioning piece, the positioning piece surrounds the ball group from the radial direction and the axial direction of the ball group at the same time, and the assembling piece surrounds the ball group from the radial direction and the axial direction of the ball group at the same time and is arranged opposite to the positioning piece.

Furthermore, the inner ring is a positioning piece and is of an integrally formed integral structure; the inner ring comprises a first inner mounting part and a first inner limiting part, wherein the first inner mounting part is used for being sleeved and fixed on the shaft body, and the first inner limiting part is positioned in the middle of the outer side of the first inner mounting part, extends outwards along the radial direction of the first inner mounting part, is used for being respectively attached to the ball groups on the two sides, and axially limits the ball groups on the two sides; the first inner limiting part and the first inner mounting parts on two sides are enclosed to form an inner half-edge rolling track, and the circular arc of the cross section of the binding surface, which is attached to the ball group, on the first inner limiting part is smaller than 1/2 full circles and larger than 1/4 full circles.

Furthermore, the binding surface attached to the ball group on the first inner mounting part is recessed towards the base body of the first inner mounting part and forms an inner half side rolling track together with the binding surface on the first inner limiting part.

Furthermore, the outer ring is an assembly piece, the outer ring is formed by oppositely buckling two half unit pieces along the axial direction, each half unit piece comprises a first outer mounting part and a first outer limiting part, the first outer mounting part is used for being assembled and fixed on the outer shell, and the first outer limiting part is positioned on the inner side of the first outer mounting part and extends inwards along the radial direction of the first outer mounting part and is used for axially limiting the corresponding ball group; the first outer limiting part and the first outer mounting part are surrounded to form an outer half edge rolling track, and the circular arc of the cross section of the binding surface, which is attached to the ball group, on the first outer limiting part is smaller than the full circle of 1/2 and larger than the full circle of 1/4; the outer ring is formed by oppositely buckling two half unit pieces with symmetrical structural appearances, and the joint surfaces of the two half unit pieces are positioned on the middle section of the multi-row combined bearing; or the outer ring is formed by oppositely buckling two half unit pieces with different structural appearances, and the joint position of the two half unit pieces is positioned at the radial position of one group of the ball groups close to the outer side.

Furthermore, a rolling channel is formed in the outer side wall of the first inner limiting part along the circumferential direction, and a loading port for loading balls into the rolling channel one by one is formed in the rolling channel; the radial dimension of the loading port is equal to that of the ball, or the radial dimension of the loading port is smaller than that of the ball and larger than 2/3 of the ball, the corner of the loading port is an arc corner, and each ball of the ball group is packaged in the rolling channel through the loading port.

Furthermore, the outer ring is a positioning piece and is of an integrally formed integral structure; the outer ring comprises a second outer mounting part and a second outer limiting part, wherein the second outer mounting part is used for being assembled and fixed on the outer shell, and the second outer limiting part is positioned in the middle of the inner side of the second outer mounting part, extends inwards along the radial direction of the second outer mounting part, is used for being respectively attached to the ball groups on the two sides, and is used for axially limiting the ball groups on the two sides; the second outer limiting part and the second outer mounting parts on two sides are respectively surrounded to form an inner half edge rolling track, and the circular arc of the cross section of the binding surface, which is attached to the ball group, on the second outer limiting part is smaller than 1/2 full circle and larger than 1/4 full circle.

Furthermore, the binding surface attached to the ball group on the second external mounting part is recessed towards the base body of the second external mounting part and forms an inner half side rolling track together with the binding surface on the second external limiting part.

Furthermore, the inner ring is an assembly part and is formed by oppositely buckling two half unit pieces along the axial direction, each half unit piece comprises a second inner mounting part and a second inner limiting part, the second inner mounting part is used for being sleeved and fixed on the shaft body, and the second inner limiting part is positioned on the inner side of the second inner mounting part and extends outwards along the radial direction of the second inner mounting part and is used for axially limiting the corresponding ball group; the second inner limiting part and the second inner mounting part are enclosed to form an outer half edge rolling track, and the cross section circular arc of the binding surface, which is attached to the ball group, on the second inner limiting part is smaller than the whole circle of 1/2 and larger than the whole circle of 1/4; the inner ring is formed by oppositely buckling two half unit pieces with symmetrical structural appearances, and the combination surfaces of the two half unit pieces are positioned on the middle section of the multi-row combined bearing; or the inner ring is formed by oppositely buckling two half unit pieces with different structural appearances, and the joint position of the two half unit pieces is positioned at the radial position of one group of the ball groups close to the outer side.

Furthermore, an oil injection nozzle for injecting lubricating oil into the multi-row combined bearing is arranged on the outer side of the outer ring, and the output end of the oil injection nozzle is communicated into a gap channel between two adjacent rows of ball groups, so that the multi-row combined bearing has the characteristics of a ball bearing and a sliding bearing; or the ball group is correspondingly assembled on the retainer and is jointly installed in the rolling channel.

Furthermore, the inner corner of the inner ring is provided with a chamfer or inclined plane stepped structure which is convenient for the assembly and positioning of the inner ring; or the outer corner part of the outer ring is provided with a chamfer or bevel stepped structure which is convenient for the outer ring to be assembled in place.

The utility model discloses following beneficial effect has:

in the multi-row combined bearing, one of the outer ring and the inner ring is used as a positioning piece for positioning and centering the whole bearing assembly and is used as an installation foundation of the whole bearing, and other parts of the bearing are assembled on the positioning foundation; the other one of the outer ring and the inner ring is designed into a split structure and is used as a splicing piece for installation and position adjustment. Carry out basic position location installation at the installation site through the setting element, then carry out basic location installation with the ball group of setting element one side through the half unit spare of corresponding side, then carry out location installation with the ball group of setting element opposite side through the half unit spare of corresponding side, then through the half unit spare of adjustment setting element both sides to reach the complete butt contact of two half unit spares, thereby realize the centering location assembly of multiseriate combination bearing. Compared with the existing traditional roller bearing and ball bearing structure and assembly mode thereof, the centering and positioning of the scheme is more accurate.

When the inner ring is used as a positioning piece and the outer ring is used as an assembly piece, the positioning piece surrounds the ball groups along two directions of the radial direction outwards of the multi-row combined bearing and the axial direction outwards from the middle section of the multi-row combined bearing to form an inner half edge rolling track, and the ball groups are limited in the radial direction inwards and the axial direction towards the middle section; the corresponding half unit pieces enclose the ball groups along the radial direction inwards of the multi-row combined bearing and the axial direction inwards from the end part of the multi-row combined bearing to the middle section to form an outer half rolling track, and limit the radial direction outwards of the ball groups and the axial direction outwards from the middle section, so as to jointly form the circumferential enclosure of the ball groups and form a radial and axial two-way enclosure structure, so that the radial and axial two-way enclosure structure has two-way stress performance which is close to the radial and axial stress performance, and the radial and axial stress of the radial and axial two-way enclosure structure is realized by taking the ball groups as the stress transmission structure of the stress link and finally transmits the stress to the inner ring and the shaft body connected with the inner ring or the outer ring and the shell connected with the inner ring, therefore, the radial bearing capacity and the axial bearing capacity of the multi-row ball groups are close to or the same, and the ball groups cannot be separated from the outer ring and the inner ring due to overlarge stress under, the overall structural stability is due to the other classes of bearings.

When the outer ring is used as a positioning piece inner ring as an assembly piece, the positioning piece encloses the ball groups along the radial inward direction of the multi-row combined bearing and the two directions of the axial outward direction of the section in the multi-row combined bearing to form an inner half edge rolling track, the ball groups are limited along the radial outward direction and the axial inward direction of the section in the multi-row combined bearing, the corresponding half edge unit pieces enclose the ball groups along the radial outward direction of the multi-row combined bearing and the two directions of the axial inward direction of the section in the end part of the multi-row combined bearing to form an outer half edge rolling track, the ball groups are limited along the radial inward direction and the axial outward direction of the section, so that the ball groups are enclosed along the circumferential direction together to form a bidirectional enclosing structure along the radial direction and the axial direction, the radial direction and the axial direction stress of the bidirectional enclosing structure are similar to the radial direction and the axial direction stress of the ball groups, and the ball groups are used as the acting force transmission structure of the stress The inner ring and the shaft body connected with the inner ring or the outer ring and the outer shell connected with the outer ring are connected with the inner ring, so that the radial bearing capacity and the axial bearing capacity of the multi-row ball groups are close to or the same, the ball groups cannot be separated from the space between the outer ring and the inner ring due to overlarge acting force under load, and the overall structural stability is caused by other types of bearings.

The multi-row combined bearing adopts multi-row ball groups which are symmetrically arranged along the middle section of the multi-row combined bearing, a plurality of groups of combined stress mechanisms of the ball groups, the positioning piece and the half unit piece are distributed in the axial direction of the multi-row balls, and the combined stress mechanisms of the plurality of groups form mutual limitation and form mutual auxiliary supporting structures, so that the radial bearing capacity and the axial bearing capacity of the multi-row ball groups are obviously improved and enhanced, and the multi-row combined bearing has approximate or even same radial and axial bearing capacity.

In addition to the above-described objects, features and advantages, the present invention has other objects, features and advantages. The present invention will be described in further detail with reference to the drawings.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification. In the drawings:

fig. 1 is a schematic structural view of a double-row combined bearing with symmetrically assembled inner ring and outer ring for positioning the inner ring according to the preferred embodiment of the present invention;

fig. 2 is a schematic structural view of an asymmetric-assembly double-row combined bearing with an inner ring and an outer ring for positioning the inner ring according to a preferred embodiment of the present invention;

fig. 3 is a schematic structural diagram of an asymmetric assembling three-row combined bearing of an inner ring positioning outer ring according to a preferred embodiment of the present invention;

FIG. 4 is a schematic view of the inner ring structure of FIG. 3;

fig. 5 is a schematic structural view of a double-row combined bearing with symmetrically assembled outer ring and inner ring for positioning in the preferred embodiment of the present invention;

FIG. 6 is a schematic structural view of a multi-row combined bearing with symmetrically assembled inner ring positioning outer rings and oil injection nozzles according to a preferred embodiment of the present invention;

FIG. 7 is a schematic view of the multi-row combination bearing with outer ring positioning of the oil nozzle according to the preferred embodiment of the present invention;

FIG. 8 is a schematic structural view of a double row type combination bearing in which the inner ring positioning outer ring of the outer ring belt assembly adjustment chamfer is symmetrically assembled according to the preferred embodiment of the present invention;

fig. 9 is a schematic structural view of a double-row combined bearing in which an outer ring is assembled to adjust the inner ring positioning outer ring of the bevel-side stepped corner, which is symmetrically assembled according to the preferred embodiment of the present invention;

fig. 10 is a schematic structural view of a double-row combined bearing in which the outer ring positioning inner ring of the inner ring belt assembly adjustment chamfer is symmetrically assembled according to the preferred embodiment of the present invention.

Illustration of the drawings:

1. an outer ring; 101. a first outer mounting portion; 102. a first outer limit portion; 103. a second outer mounting portion; 104. a second outer limit portion; 2. a ball group; 3. an inner ring; 301. a first inner mounting portion; 302. a first inner limiting part; 3021. loading into an opening; 303. a second inner mounting portion; 304. a second inner limiting part; 4. a half unit piece; 5. an oil injection nozzle.

Detailed Description

The embodiments of the invention will be described in detail below with reference to the drawings, but the invention can be implemented in many different ways, which are defined and covered below.

Fig. 1 is a schematic structural view of a double-row combined bearing with symmetrically assembled inner ring and outer ring for positioning the inner ring according to the preferred embodiment of the present invention; fig. 2 is a schematic structural view of an asymmetric-assembly double-row combined bearing with an inner ring and an outer ring for positioning the inner ring according to a preferred embodiment of the present invention; fig. 3 is a schematic structural diagram of an asymmetric assembling three-row combined bearing of an inner ring positioning outer ring according to a preferred embodiment of the present invention; FIG. 4 is a schematic view of the inner ring structure of FIG. 3; fig. 5 is a schematic structural view of a double-row combined bearing with symmetrically assembled outer ring and inner ring for positioning in the preferred embodiment of the present invention; FIG. 6 is a schematic structural view of a multi-row combined bearing with symmetrically assembled inner ring positioning outer rings and oil injection nozzles according to a preferred embodiment of the present invention; FIG. 7 is a schematic view of the multi-row combination bearing with outer ring positioning of the oil nozzle according to the preferred embodiment of the present invention; FIG. 8 is a schematic structural view of a double row type combination bearing in which the inner ring positioning outer ring of the outer ring belt assembly adjustment chamfer is symmetrically assembled according to the preferred embodiment of the present invention; fig. 9 is a schematic structural view of a double-row combined bearing in which an outer ring is assembled to adjust the inner ring positioning outer ring of the bevel-side stepped corner, which is symmetrically assembled according to the preferred embodiment of the present invention; fig. 10 is a schematic structural view of a double-row combined bearing in which the outer ring positioning inner ring of the inner ring belt assembly adjustment chamfer is symmetrically assembled according to the preferred embodiment of the present invention.

As shown in fig. 1, the multi-row combination bearing of the present embodiment includes an outer ring 1, ball groups 2 and an inner ring 3, at least two rows of ball groups 2 are used for supporting between the outer ring 1 and the inner ring 3, the outer ring 1 and the inner ring 3 relatively enclose to form a rolling channel for circumferential rolling of the ball groups 2, one of the outer ring 1 and the inner ring 3 is a positioning member for assembling and positioning the whole multi-row combination bearing, and the other is an assembly member for respectively loading a plurality of rows of balls into corresponding rolling channel positions on the positioning member and closing the rolling channels; the assembling piece is formed by splicing and combining two half unit pieces 4 along the axial direction from two sides of the positioning piece respectively, the positioning piece surrounds the ball group 2 from the radial direction and the axial direction of the ball group 2 at the same time, and the assembling piece surrounds the ball group 2 from the radial direction and the axial direction of the ball group 2 and is arranged opposite to the positioning piece. In fig. 1, a double row combined bearing is shown, two rows of ball groups 2 are respectively arranged on two sides of an inner ring 3 as a positioning member, the whole double row combined bearing is formed by pressing and assembling two sides of the inner ring 3 through an outer ring 1 formed by combining two half unit pieces 4, and the structure of the two half unit pieces 4 is a symmetrical structure symmetrical about a middle joint surface.

In the multi-row combined bearing, one of the outer ring 1 and the inner ring 3 is used as a positioning piece for positioning and centering of the whole bearing assembly and is used as an installation foundation of the whole bearing, and other parts of the bearing are assembled on the positioning foundation; the other of the outer ring 1 and the inner ring 3 is designed into a split structure and serves as a mounting and position-adjusting assembly. Carry out basic position location installation at the installation site through the setting element, then carry out basic location installation with the ball group 2 of setting element one side through half unit spare 4 that corresponds the side, then carry out location installation with the ball group 2 of setting element opposite side through half unit spare 4 that corresponds the side, then through half unit spare 4 of adjusting the setting element both sides to reach the complete butt contact of two half unit spares 4, thereby realize multiseriate combination bearing's centering location assembly. Compared with the existing traditional roller bearing and ball bearing structure and assembly mode thereof, the centering and positioning of the scheme is more accurate.

When the inner ring 3 is used as the positioning piece outer ring 1 as an assembly piece, the positioning piece surrounds the ball group 2 along two directions of radial outward of the multi-row combined bearing and axial outward of the middle section of the multi-row combined bearing to form an inner half edge rolling track, and meanwhile, the ball group 2 is limited in the radial inward direction and the axial inward section direction; the corresponding half unit pieces 4 enclose the ball group 2 along the radial direction inwards of the multi-row combined bearing and the axial direction inwards from the end part of the multi-row combined bearing to the middle section, so as to form an outer half rolling track, and simultaneously limit the radial direction outwards of the ball group 2 and the axial direction outwards from the middle section, so as to jointly form the circumferential enclosure of the ball group 2, and form a bidirectional enclosure structure with similar radial and axial stress performances, so that the bidirectional enclosure structure has the radial and axial stress performances, and the radial and axial stress of the bidirectional enclosure structure is realized by taking the ball group 2 as a stress transmission structure of a stress link and finally transmits the stress to the inner ring 3 and a shaft body connected with the inner ring or the outer ring 1 and a shell body connected with the inner ring, so that the radial bearing capacity and the axial bearing capacity of the multi-row ball group 2 are similar or identical, and the ball group 2 can not be separated from the outer ring 1 and the inner ring 3 due to excessive acting force under the load, and the whole structural stability is caused by other types of bearings.

When the outer ring 1 is used as a positioning piece inner ring 3 as an assembly piece, the positioning piece surrounds the ball group 2 along the radial inward direction of the multi-row combined bearing and the axial outward direction of the section in the multi-row combined bearing to form an inner half edge rolling track, the ball group 2 is limited along the radial outward direction and the axial inward direction of the section in the multi-row combined bearing, the corresponding half edge unit piece 4 surrounds the ball group 2 along the radial outward direction of the multi-row combined bearing and the axial inward direction of the section in the end part of the multi-row combined bearing to form an outer half edge rolling track, the ball group 2 is limited along the radial inward direction and the axial outward direction of the section, so as to form a surrounding to the circumferential direction of the ball group 2 together, form a bidirectional surrounding structure along the radial direction and the axial direction, enable the bidirectional stress performance of the bidirectional surrounding structure to be close to the radial direction and the axial direction stress performance, and enable the radial direction and the axial direction stress to be the acting force transmission structure taking the ball group The acting force is transmitted to the inner ring 3 and the shaft body connected with the inner ring or the outer ring 1 and the outer shell connected with the outer ring, so the radial bearing capacity and the axial bearing capacity of the multiple rows of ball groups 2 are close to or the same, the ball groups 2 cannot be separated from the space between the outer ring 1 and the inner ring 3 due to the overlarge acting force under the load, and the overall structural stability is caused by other types of bearings.

The multi-column combined bearing adopts the multi-column ball group 2, the multi-column ball group 2 is symmetrically arranged along the middle section of the multi-column combined bearing, a plurality of groups of combined stress mechanisms of the ball group 2 and the positioning piece and the half unit piece 4 are distributed in the axial direction of the multi-column balls, and the combined stress mechanisms form mutual limitation and form mutual auxiliary supporting structures, so that the radial bearing capacity and the axial bearing capacity of the multi-column ball group 2 are obviously improved and enhanced, and the multi-column combined bearing has approximate or even same radial and axial bearing capacity.

As shown in fig. 1 and 2, in the present embodiment, the inner ring 3 is a positioning element and the inner ring 3 is an integrally formed integral structure. The inner ring 3 comprises a first inner mounting portion 301 for being sleeved and fixed on the shaft body and a first inner limiting portion 302 which is located in the middle of the outer side of the first inner mounting portion 301 and extends outwards in the radial direction of the first inner mounting portion 301 to be respectively attached to the ball groups 2 on the two sides and axially limit the ball groups 2 on the two sides. The first inner limiting part 302 and the first inner mounting parts 301 on two sides respectively enclose to form an inner half-edge rolling track, and the cross section circular arc of the joint surface of the first inner limiting part 302 and the ball group 2 is smaller than 1/2 full circle and larger than 1/4 full circle. Inner ring 3 adopts integrated into one piece's overall structure to act as the location basis of whole multiseriate combination bearing installation assembly as the setting element, multiseriate ball group 2 assembles respectively and carries out pre-compaction installation location respectively to two half unit pieces 4 through outer loop 1 in the interior half roll track that corresponds, then progressively exerts pressure to half unit piece 4 respectively, finally reach two half unit pieces 4 axial and lean on, accomplish the purpose of centering the accurate installation of location with reaching multiseriate combination bearing. Alternatively, it is possible to add washers between the two half-unit pieces 4 according to the installation requirements, in order to achieve an increase in the axial dimension of the rolling channels, i.e. the axial dimension of the rolling channels can be adjusted by means of washers, to meet the assembly requirements, for example for accommodating the insertion and fixing of the cage, or for accommodating balls of greater radial dimension. The cross section circular arc of the joint face of the first inner limiting portion 302 and the ball group 2 is smaller than 1/2 full circle and larger than 1/4 full circle, so that the first inner limiting portion 302 has a circular arc contact face of 1/2 full circle and larger than 1/4 full circle, and the contact face is in contact with the ball group 2 along the axial direction of the multi-row combined bearing, so that the axial stress performance of the multi-row combined bearing is improved, and the ball group 2 cannot be separated from the outer ring 1 and the inner ring 3 through the axial limitation of the first inner limiting portion 302, and the structural operation stability is better. In fig. 2, a double row combined bearing is shown, two rows of ball groups 2 are respectively arranged on both sides of an inner ring 3 as a positioning member, the whole double row combined bearing is formed by pressing and assembling the inner ring 3 on both sides through an outer ring 1 formed by combining two half unit pieces 4, the joint surfaces of the two half unit pieces 4 are in the radial direction of one row of ball groups 2, and the joint surfaces of the two half unit pieces 4 are arranged in parallel with the middle section of the double row combined bearing.

As shown in fig. 1 and fig. 2, in the present embodiment, the contact surface of the first inner mounting portion 301, which contacts the ball group 2, is recessed toward the inside of the base body of the first inner mounting portion 301 and forms an inner half rolling track together with the contact surface of the first inner stopper portion 302. The first inner mounting part 301 and the first inner limiting part 302 jointly enclose to form an inner half side rolling track, the arc length of a binding surface of the first inner mounting part and the ball group 2 is increased, and a comprehensive stress body is formed, so that the radial and axial stress performance of the whole multi-column combined bearing and the accurate centering and positioning capacity in the assembling process are provided, particularly, the optimization of the axial stress performance is obvious, and the axial stress performance can be close to or even equal to the radial stress performance.

As shown in fig. 1 and fig. 2, in the present embodiment, the outer ring 1 is a built-up unit, the outer ring 1 is formed by two half unit pieces 4 which are oppositely buckled in the axial direction, and the half unit piece 4 includes a first outer mounting portion 101 for being assembled and fixed on the outer shell, and a first outer limiting portion 102 which is located inside the first outer mounting portion 101 and extends inward in the radial direction of the first outer mounting portion 101 for axially limiting the corresponding ball group 2. The mode of adopting the lock to assemble is in order to realize the positioning of outer loop 1, can be through the mode from the both sides assembly of inner ring 3 and progressively application of force to well centering in the assembly process is fixed a position accurately, and the assembly precision can be guaranteed. The half-unit piece 4 is provided with a first outer limiting part 102 for limiting the axial joint of the ball group 2 and a first outer mounting part 101 for limiting the radial joint, and the structure and the positioning structure of the inner ring 3 are arranged oppositely to form a bidirectional supporting and limiting mechanism for the ball group 2, so that the running stability of the ball group 2 is ensured, and the radial or axial loads borne by the multi-row combined bearing can be transmitted through the outer ring 1, the ball group 2 and the inner ring 3, thereby achieving the same force bearing performance along the radial direction and the axial direction. The first outer limiting part 102 and the first outer mounting part 101 enclose to form an outer half-edge rolling track, and the cross section circular arc of the joint surface of the first outer limiting part 102 and the ball group 2 is smaller than 1/2 full circle and larger than 1/4 full circle. The first outer limiting portion 102 is provided with an arc contact surface which is 1/2 full circle and is larger than 1/4 full circle, and the contact surface is in contact with the ball group 2 along the axial direction of the multi-row combined bearing, so that the axial stress performance of the multi-row combined bearing is improved, the ball group 2 cannot be separated from the outer ring 1 and the inner ring 3 through the axial limitation of the first outer limiting portion 102, and the structural operation stability is better. Alternatively, the outer ring 1 is formed by oppositely buckling two half unit pieces 4 with symmetrical structural appearance, and the combining surfaces of the two half unit pieces 4 are positioned on the middle section of the multi-row combined bearing. The symmetrical structure is formed along the middle section of the multi-row combined bearing, so that the parts can be conveniently produced, processed and manufactured in batch, the manufacturing cost is low, and the stress and force transfer performance of the symmetrical structure are more uniform, thereby being beneficial to improving the operation stability of the structure. Alternatively, the outer ring 1 is formed by oppositely buckling two half unit pieces 4 with different structural shapes, and the joint position of the two half unit pieces 4 is positioned at the radial position of one group of the outer ball groups 2. The relatively large half unit piece 4 is firstly installed and assembled in place, and then the small half unit piece 4 is used for assembly and adjustment, so that the installation and assembly of the structure and the timely adjustment of the assembly position are facilitated. Different effects can be produced through different deviation directions of the combining part, for example, the combining part is deflected towards the direction of the smaller half unit piece 4, and the ball group 2 can be pre-positioned at the same time when the larger half unit piece 4 is assembled, so that the ball group 2 is prevented from being separated from the installation position; or the combined position is deflected towards the direction of the larger half unit piece 4, so that the smaller half unit piece 4 is favorably installed in place, and the smaller half unit piece 4 is rolled and pressed into the direction of the larger half unit piece 4 and is attached and abutted by the rolling acting force of the ball group 2 in the installation process.

As shown in fig. 3 and 4, in the present embodiment, a rolling channel is formed on an outer side wall of the first inner limiting portion 302 along a circumferential direction, and a loading port 3021 for loading balls one by one into the rolling channel is formed on the rolling channel. The balls of the ball group 2 are respectively loaded through the loading port 3021; or the ball group 2 with the cage is assembled into the rolling passage through the assembly port 3021 in a group. Alternatively, the plurality of loading ports 3021 are uniformly arranged in the circumferential direction of the first inner stopper portion 302 to reduce the eccentric force of the multi-row combination bearing. Optionally, the radial dimension of the loading port 3021 is equal to the radial dimension of the ball. Alternatively, the radial dimension of the loading port 3021 is smaller than the radial dimension of the balls and larger than the radial dimension of 2/3 balls, the corner of the loading port 3021 is a rounded corner, and each ball of the ball group 2 is packed in the rolling channel through the loading port 3021. The circular arc corner setting of loading port 3021 avoids causing mechanical damage to ball group 2, does benefit to the packing into of ball group 2 simultaneously. The caliber of the loading port 3021 is slightly smaller than the radial dimension of each ball of the ball group 2, so that the balls are not easy to drop out after being loaded into the rolling channel through the loading port 3021. Shown in fig. 3 is a three-row combined bearing, wherein two rows of ball groups 2 are respectively arranged at two sides of an inner ring 3 as a positioning element, a middle row of ball groups 2 is arranged in a rolling channel arranged on the outer side wall of a first inner limiting part 302, the two sides of an outer ring 1 are tightly pressed and assembled through the inner ring 3 formed by combining two half unit pieces 4 to form the whole two-row combined bearing, the joint surfaces of the two half unit pieces 4 are positioned at the middle section position of the two-row combined bearing, the structure of the two half unit pieces 4 is symmetrical relative to the middle section, and the joint surfaces of the two half unit pieces 4 are arranged in parallel with the middle section of the multi-row combined bearing.

As shown in fig. 5, in the present embodiment, the outer ring 1 is a positioning element and the outer ring 1 is an integrally formed integral structure. The outer ring 1 comprises a second outer mounting part 103 for being assembled and fixed on the outer shell and a second outer limiting part 104 which is arranged in the middle of the inner side of the second outer mounting part 103 and extends inwards along the radial direction of the second outer mounting part 103 for respectively being jointed with the ball groups 2 on the two sides and axially limiting the ball groups 2 on the two sides. The second outer limiting part 104 and the second outer mounting parts 103 on two sides are respectively enclosed to form an inner half-edge rolling track, and the cross section circular arc of the joint surface of the second outer limiting part 104 and the ball group 2 is smaller than 1/2 full circle and larger than 1/4 full circle. Outer loop 1 adopts integrated into one piece's overall structure, and act as the location basis of whole multiseriate combination bearing installation assembly as the setting element, multiseriate ball group 2 assembles respectively and carries out pre-compaction installation location respectively to two half unit pieces 4 through inner ring 3 in the interior half rolling track that corresponds, then progressively exerts pressure to half unit piece 4 respectively, finally reach two half unit pieces 4 axial and lean on, accomplish the purpose of centering the accurate installation of location in order to reach multiseriate combination bearing. Alternatively, it is possible to add washers between the two half-unit pieces 4 according to the installation requirements, in order to achieve an increase in the axial dimension of the rolling channels, i.e. the axial dimension of the rolling channels can be adjusted by means of washers, to meet the assembly requirements, for example for accommodating the insertion and fixing of the cage, or for accommodating balls of greater radial dimension. The cross section circular arc of the joint surface of the second outer limiting part 104 and the ball group 2 is smaller than 1/2 full circle and larger than 1/4 full circle, so that the second outer limiting part 104 has a circular arc contact surface of 1/2 full circle and larger than 1/4 full circle, and the contact surface is in contact with the ball group 2 along the axial direction of the multi-row combined bearing, so that the axial stress performance of the multi-row combined bearing is improved, and the ball group 2 cannot be separated from the space between the outer ring 1 and the inner ring 3 through the axial limitation of the second outer limiting part 104, and the structural operation stability is better. In fig. 5, a double row combined bearing is shown, two rows of ball groups 2 are respectively arranged on both sides of an outer ring 1 as a spacer, the whole double row combined bearing is formed by pressing and assembling the inner ring 3 from both sides through an inner ring 3 formed by combining two half unit pieces 4, the joint surfaces of the two half unit pieces 4 are in the radial direction of one row of ball groups 2, and the joint surfaces of the two half unit pieces 4 are arranged in parallel with the middle section of the double row combined bearing.

As shown in fig. 5, in this embodiment, the contact surface of the second outer mounting portion 103 contacting the ball group 2 is recessed toward the inside of the base of the second outer mounting portion 103 and forms an inner half rolling track together with the contact surface of the second outer stopper portion 104. The second outer mounting part 103 and the second outer limiting part 104 jointly enclose to form an inner half side rolling track, the arc length of a binding surface of the second outer mounting part and the ball group 2 is increased, and a comprehensive stress body is formed, so that the radial and axial stress performance of the whole multi-row combined bearing and the accurate centering and positioning capacity in the assembling process are provided, particularly, the optimization of the axial stress performance is obvious, and the axial stress performance can be close to or even equal to the radial stress performance.

As shown in fig. 5, in the present embodiment, the inner ring 3 is a built-up component, the inner ring 3 is formed by two half unit pieces 4 which are relatively buckled in the axial direction, and each half unit piece 4 includes a second inner mounting portion 303 for being sleeved and fixed on the shaft body, and a second inner limiting portion 304 which is located inside the second inner mounting portion 303 and extends outward in the radial direction of the second inner mounting portion 303 for axially limiting the corresponding ball group 2. Adopt the mode of lock assembly in order to realize the positioning of inner ring 3, can be through the mode from the both sides assembly of outer loop 1 and progressively application of force to it is accurate to do benefit to well centering location among the assembling process, and the assembly precision can be guaranteed. The half-unit piece 4 is provided with a second inner limiting part 304 for limiting the axial joint of the ball group 2 and a second inner mounting part 303 for limiting the radial joint, and the structure and the positioning structure of the outer ring 1 are arranged oppositely to form a bidirectional supporting and limiting mechanism aiming at the ball group 2, thereby ensuring the running stability of the ball group 2, and simultaneously enabling the radial or axial load born by the multi-row combined bearing to be transmitted through the outer ring 1, the ball group 2 and the inner ring 3, thereby forming the bearing performance which is equal to the radial and axial directions. The second inner limiting part 304 and the second inner mounting part 303 enclose to form an outer half-edge rolling track, and the cross section circular arc of the joint surface of the second inner limiting part 304 and the ball group 2 is smaller than 1/2 full circle and larger than 1/4 full circle. The second inner limiting portion 304 has an arc contact surface which is 1/2 full circle and is larger than 1/4 full circle, and the contact surface is in contact with the ball group 2 along the axial direction of the multi-row combined bearing, so that the axial stress performance of the multi-row combined bearing is improved, the ball group 2 cannot be separated from the outer ring 1 and the inner ring 3 through the axial limitation of the second inner limiting portion 304, and the structural operation stability is better. Optionally, the inner ring 3 is formed by oppositely buckling two half unit pieces 4 with symmetrical structural appearance, and the combining surfaces of the two half unit pieces 4 are positioned on the middle section of the multi-row combined bearing. The symmetrical structure is formed along the middle section of the multi-row combined bearing, so that the parts can be conveniently produced, processed and manufactured in batch, the manufacturing cost is low, and the stress and force transfer performance of the symmetrical structure are more uniform, thereby being beneficial to improving the operation stability of the structure. Alternatively, the inner ring 3 is formed by oppositely buckling two half unit pieces 4 with different structural shapes, and the joint position of the two half unit pieces 4 is positioned at the radial position of one group of the outer ball groups 2. The relatively large half unit piece 4 is firstly installed and assembled in place, and then the small half unit piece 4 is used for assembly and adjustment, so that the installation and assembly of the structure and the timely adjustment of the assembly position are facilitated. Different effects can be produced through different deviation directions of the combining part, for example, the combining part is deflected towards the direction of the smaller half unit piece 4, and the ball group 2 can be pre-positioned at the same time when the larger half unit piece 4 is assembled, so that the ball group 2 is prevented from being separated from the installation position; or the combined position is deflected towards the direction of the larger half unit piece 4, so that the smaller half unit piece 4 is favorably installed in place, and the smaller half unit piece 4 is rolled and pressed into the direction of the larger half unit piece 4 and is attached and abutted by the rolling acting force of the ball group 2 in the installation process.

As shown in fig. 6 and 7, in the present embodiment, an oil injection nozzle 5 for injecting lubricating oil into a plurality of rows of combined bearings is provided on the outer side of the outer ring 1, and the output end of the oil injection nozzle 5 is communicated to the clearance passage between two adjacent rows of ball groups 2, so that the plurality of rows of combined bearings have the characteristics of both ball bearings and sliding bearings. Lubricating oil is injected into a gap channel between two adjacent rows of ball groups 2 through the oil injection nozzle 5, so that the multi-row bearing has rolling support of the ball groups 2, surface contact sliding support between two adjacent rows of ball groups 2 can also exist, and the multi-row bearing further has the characteristics of a rolling bearing and a sliding bearing. Alternatively, the oil nozzle 5 can be arranged on the integral surface of the outer ring 1, so that the structural integrity is better and the oil nozzle is not easy to leak; or the oil injection nozzle 5 can also be arranged on the splicing surface of the splicing piece, so that the timely adjustment and correction of the assembly position are facilitated, and the assembly position precision is ensured. Optionally, the ball group 2 is correspondingly assembled on the retainer and is jointly installed in the rolling channel, and the ball group 2 is assembled in a group, so that the operation stability is better, and the mutual collision and abrasion of the balls or the generation of noise are also avoided.

As shown in fig. 8, 9 and 10, in the present embodiment, the inner corner of the inner ring 3 is provided with a chamfered or inclined stepped configuration to facilitate the fitting positioning of the inner ring 3. Alternatively, the outer corner portion of the outer ring 1 is provided with a chamfered or bevel stepped configuration to facilitate assembly of the outer ring 1 into position. The chamfer or inclined plane stepped structure is arranged at the corner part of the inner ring 3 and/or the outer ring 1, so that the inner ring 3 and/or the outer ring 1 can be pushed and pressed by a special assembling tool for the reason of conical matching, the centering positioning assembly of a multi-row combined bearing is facilitated, the accurate fine adjustment of the assembling position can be carried out through the conical matching, the assembling position precision is ensured, and the assembling requirement of high standard is met.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. A multi-row combined bearing comprises an outer ring (1), a ball group (2) and an inner ring (3),

at least two rows of ball groups (2) are adopted between the outer ring (1) and the inner ring (3) for supporting,

the outer ring (1) and the inner ring (3) relatively enclose to form a rolling channel for the ball group (2) to roll in the circumferential direction,

it is characterized in that the preparation method is characterized in that,

one of the outer ring (1) and the inner ring (3) is a positioning piece for assembling and positioning the whole multi-row combined bearing, and the other one is an assembly piece for respectively loading a plurality of rows of balls into corresponding rolling channel positions on the positioning piece and closing the rolling channels;

the assembling piece is formed by splicing and combining two half unit pieces (4) from two sides of the positioning piece along the axial direction respectively, the positioning piece is simultaneously arranged from the radial direction and the axial direction of the ball group (2) to enclose the ball group (2), and the assembling piece is simultaneously arranged from the radial direction and the axial direction of the ball group (2) to enclose the ball group (2) and to be arranged relative to the positioning piece.

2. Multi-row combination bearing according to claim 1,

the inner ring (3) is the positioning piece and the inner ring (3) is an integrally formed integral structure;

the inner ring (3) comprises a first inner mounting part (301) and a first inner limiting part (302), wherein the first inner mounting part (301) is used for being sleeved and fixed on the shaft body, the first inner limiting part is positioned in the middle of the outer side of the first inner mounting part (301), extends outwards along the radial direction of the first inner mounting part (301), and is used for being respectively attached to the ball groups (2) on the two sides and axially limiting the ball groups (2) on the two sides;

first interior spacing portion (302) enclose with both sides first interior installation department (301) respectively and close and constitute interior half limit rolling track, first interior spacing portion (302) go up with the cross section circular arc of the binding face that ball group (2) laminated mutually is less than 1/2 full circle and is greater than 1/4 full circle.

3. Multi-row combination bearing according to claim 2,

the first inner installation part (301) is provided with a binding face which is attached to the ball group (2) and faces towards the inner concave part of the base body of the first inner installation part (301) and forms an inner half rolling track together with the binding face on the first inner limiting part (302).

4. Multi-row combination bearing according to claim 2,

the outer ring (1) is an assembly piece, the outer ring (1) is formed by oppositely buckling two half unit pieces (4) along the axial direction, and each half unit piece (4) comprises a first outer mounting part (101) used for being assembled and fixed on the outer shell and a first outer limiting part (102) which is positioned on the inner side of the first outer mounting part (101) and extends inwards along the radial direction of the first outer mounting part (101) and is used for axially limiting the corresponding ball group (2);

the first outer limiting part (102) and the first outer mounting part (101) are enclosed to form an outer half edge rolling track, and the cross section circular arc of a joint surface, attached to the ball group (2), of the first outer limiting part (102) is smaller than the full circle of 1/2 and larger than the full circle of 1/4;

the outer ring (1) is formed by oppositely buckling two half unit pieces (4) with symmetrical structural appearances, and the joint surfaces of the two half unit pieces (4) are positioned on the middle section of a multi-row combined bearing; or the outer ring (1) is formed by oppositely buckling two half unit pieces (4) with different structural appearances, and the joint position of the two half unit pieces (4) is positioned at the radial position of one group of the ball groups (2) close to the outer side.

5. Multi-row combination bearing according to claim 2,

a rolling channel is formed in the outer side wall of the first inner limiting part (302) along the circumferential direction, and a loading port (3021) for loading balls into the rolling channel one by one is formed in the rolling channel;

the radial dimension of the loading opening (3021) is equal to the radial dimension of the ball, or

The radial dimension of the loading opening (3021) is smaller than that of the ball bearings and larger than that of 2/3 ball bearings, the corner of the loading opening (3021) is a circular arc corner, and the ball bearings of the ball bearing group (2) are packaged in the rolling channel through the loading opening (3021).

6. Multi-row combination bearing according to claim 1,

the outer ring (1) is a positioning piece and the outer ring (1) is of an integrally formed integral structure;

the outer ring (1) comprises a second outer mounting part (103) which is used for being assembled and fixed on the outer shell and a second outer limiting part (104) which is positioned in the middle of the inner side of the second outer mounting part (103), extends inwards along the radial direction of the second outer mounting part (103) and is used for being respectively attached to the ball groups (2) on the two sides and axially limiting the ball groups (2) on the two sides;

the second outer limiting part (104) is respectively enclosed with the second outer mounting parts (103) on two sides to form an inner half edge rolling track, and the arc of the cross section of the joint surface, attached to the ball group (2), of the second outer limiting part (104) is smaller than 1/2 full circles and larger than 1/4 full circles.

7. Multi-row combination bearing according to claim 6,

the binding face of the second outer mounting part (103) which is bound with the ball group (2) faces towards the inner concave part of the base body of the second outer mounting part (103) and the binding face of the second outer limiting part (104) jointly forms an inner half side rolling track.

8. Multi-row combination bearing according to claim 6,

the inner ring (3) is an assembly piece, the inner ring (3) is formed by oppositely buckling two half unit pieces (4) along the axial direction, and each half unit piece (4) comprises a second inner mounting part (303) used for being sleeved and fixed on a shaft body and a second inner limiting part (304) which is positioned on the inner side of the second inner mounting part (303) and extends outwards along the radial direction of the second inner mounting part (303) and is used for axially limiting the corresponding ball group (2);

the second inner limiting part (304) and the second inner mounting part (303) enclose to form an outer half edge rolling track, and the cross section circular arc of a joint surface, attached to the ball group (2), on the second inner limiting part (304) is smaller than the full circle of 1/2 and larger than the full circle of 1/4;

the inner ring (3) is formed by oppositely buckling two half unit pieces (4) with symmetrical structural appearances, and the joint surfaces of the two half unit pieces (4) are positioned on the middle section of the multi-row combined bearing; or the inner ring (3) is formed by oppositely buckling two half unit pieces (4) with different structural appearances, and the joint position of the two half unit pieces (4) is positioned at the radial position of one group of the ball groups (2) close to the outer side.

9. Multi-row combination bearing according to any of claims 1 to 8,

an oil injection nozzle (5) used for injecting lubricating oil into the multi-row combined bearing is arranged on the outer side of the outer ring (1), and the output end of the oil injection nozzle (5) is communicated into a gap channel between two adjacent rows of ball groups (2), so that the multi-row combined bearing has the characteristics of a ball bearing and a sliding bearing; or

The ball group (2) is correspondingly assembled on the retainer and is jointly installed in the rolling channel.

10. Multi-row combination bearing according to any of claims 1 to 8,

the inner corner of the inner ring (3) is provided with a chamfer or inclined plane stepped structure which is convenient for the assembly and positioning of the inner ring (3); or

The outer corner of the outer ring (1) is provided with a chamfer or bevel ladder-shaped structure which is convenient for the outer ring (1) to be assembled in place.

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