A thrust needle roller bearing assembly and a transmission

Abstract

The invention discloses a thrust needle roller bearing assembly and a transmission, including a transmission body and a thrust needle roller bearing assembly; the thrust needle roller bearing assembly includes a first roller retainer assembly, a second roller retainer assembly and a spacer, the spacer is arranged between the first roller retainer assembly and the second roller retainer assembly, a first gasket is arranged on one side of the first roller retainer assembly; a second gasket is arranged on one side of the second roller retainer assembly; the transmission body includes a matching shaft, a left end matching piece and a right end matching piece, the thrust needle roller bearing assembly is sleeved on the matching shaft; the first gasket is inserted on the left end matching piece, and the second gasket is inserted on the left end matching piece. During operation, the two sets of roller retainer assemblies assembled on the transmission rotate in opposite directions, and compared with conventional thrust needle roller bearings, the rated speed is doubled with the same outer diameter size, which meets the large size and high speed requirements of certain structures of hydraulic automatic transmissions.

Description

Technical Field

[0001] The invention belongs to the technical field of needle roller bearings and relates to a thrust needle roller bearing assembly and a transmission. Background Art

[0002] Thrust needle roller bearings are widely used in hydraulic automatic transmissions. They have the characteristics of bearing axial loads, small friction torque during operation, and high rotation accuracy. However, due to the increase in the size of conventional thrust needle roller bearings, the rated speed is reduced, and there is sliding friction between the components of conventional thrust needle roller bearings. During the rotation process, the resistance of the sliding friction affects the rotation rate, and cannot meet the large size and high speed requirements of some structures of hydraulic automatic transmissions. Summary of the invention

[0003] In view of the problems existing in the prior art, the present invention provides a thrust needle roller bearing assembly and a transmission, which doubles the rated speed, meets the large size and high speed requirements of certain structures of hydraulic automatic transmissions, prevents premature wear of bearings, and solves technical problems.

[0004] The present invention is achieved through the following technical solutions:

[0005] A thrust needle roller bearing assembly comprises a first roller retainer assembly, a second roller retainer assembly and a spacer, wherein the spacer is arranged between the first roller retainer assembly and the second roller retainer assembly, a first gasket is arranged on a side of the first roller retainer assembly away from the spacer, and a second gasket is arranged on a side of the second roller retainer assembly away from the spacer.

[0006] Preferably, the first gasket and the second gasket include a flange and a vertical edge, the first gasket and the second gasket are in a circular ring shape, and the flange and the vertical edge are at right angles.

[0007] Preferably, a first oil groove is provided on the spacer, and a first oil hole is provided in the first oil groove.

[0008] Preferably, the first gasket, the second gasket, the first roller cage assembly, the second roller cage assembly and the spacer are all made of bearing steel.

[0009] A transmission for a thrust needle roller bearing assembly, comprising a transmission body and a thrust needle roller bearing assembly; the thrust needle roller bearing assembly comprises the first gasket, the second gasket, the first roller cage assembly, the second roller cage assembly and a spacer;

[0010] The transmission body comprises a matching shaft, a left end matching piece and a right end matching piece, and the thrust needle roller bearing assembly is sleeved on the matching shaft; the flange on the first gasket is inserted on the left end matching piece, and the flange on the second gasket is inserted on the left end matching piece.

[0011] Preferably, a second oil hole and a third oil hole are provided on the mating shaft; and an oil storage tank is provided on the mating shaft.

[0012] Preferably, the thrust needle roller bearing assembly is installed in a matching seat hole of the transmission.

[0013] Preferably, a clearance fit is set between the roller retainer assembly and the mating shaft, a clearance fit is set between one end of the left end mating piece and the first gasket, a clearance fit is set between one end of the right end mating piece and the second gasket, and a clearance fit is set between the spacer and the mating seat hole.

[0014] Preferably, when the transmission is operating, the first roller cage assembly and the second roller cage assembly rotate in opposite directions.

[0015] Preferably, the left-end mating part and the right-end mating part are both sun gears of a transmission.

[0016] Compared with the prior art, the present invention has the following beneficial technical effects:

[0017] The present invention provides a thrust needle roller bearing assembly and a transmission, which are symmetrical through two sets of roller retainer assemblies and spacers. During operation, the two sets of roller retainer assemblies assembled on the transmission have opposite rotation directions. Compared with conventional thrust needle roller bearings, with the same outer diameter, the rated speed is doubled, which meets the large size and high speed requirements of certain structures of hydraulic automatic transmissions, prevents early wear of the bearings and affects the speed, and solves the technical problems in the industry.

[0018] Furthermore, the roller retainer assembly of the present invention is clearance-fitted with the mating shaft, ensuring that the lubricating oil path can flow smoothly to the rollers; both the spacer and the mating shaft are provided with oil storage grooves for easy oil storage, providing the thrust needle roller bearing assembly with sufficient lubricating oil paths and oil storage structures, so that the thrust needle roller bearing assembly has good lubricity.

[0019] Furthermore, by arranging an oil storage groove and an oil hole on the mating shaft, sufficient lubricating oil paths are reserved for the left and right end mating parts of the transmission, so that the left and right end mating parts have good lubricity.

[0020] Furthermore, the thrust needle roller bearing assembly of the present invention is a split bearing, which is easy to disassemble and assemble, and is conducive to checking the wear condition of the bearing. There is no lock between the gasket and the roller retainer assembly, and the processability is good and easy to process.

[0021] Furthermore, the materials of the various components of the thrust needle roller bearing assembly of the present invention are common bearing steel, and the materials of the matching shaft, matching seat hole, left end matching part, and right end matching part are common steel parts, and there are no special requirements for the materials, good processability, and low manufacturing cost. There are no special requirements for the structures of the matching shaft, matching seat hole, left end matching part, and right end matching part, and the processability is good. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a structural diagram of the thrust needle roller bearing assembly of the present invention;

[0023] Figure 2 It is a front view of the thrust needle roller bearing assembly of the present invention;

[0024] Figure 3 is a structural diagram of the spacer 3, FIG. (a) is a front view, and FIG. (b) is a side view;

[0025] Figure 4 : is a structural diagram of the gasket, Figure (a) is the main view, Figure (b) is the left view, and Figure (c) is the right view;

[0026] Figure 5 : is a structural diagram of a roller cage assembly, wherein (a) is a main view, (b) is a left view, and (c) is a right view;

[0027] Figure 6 It is an assembly relationship diagram of the thrust needle roller bearing assembly and the transmission of the present invention;

[0028] Figure 7 It is a partial enlarged view of the assembly of the thrust needle roller bearing assembly and the transmission of the present invention;

[0029] In the figure, the first gasket 11, the second gasket 12, the first roller retainer assembly 21, the second roller retainer assembly 22, the spacer 3, the mating shaft 4, the mating seat hole part 5, the left end mating part 6, the right end mating part 7, the first oil hole 8, the first oil groove 9, the second oil hole 10, the second oil groove 11, and the third oil hole 12. DETAILED DESCRIPTION

[0030] The present invention is further described in detail below in conjunction with specific embodiments, which are intended to explain the present invention rather than to limit it.

[0031] The following detailed descriptions are all descriptions of embodiments, and are intended to provide further detailed descriptions of the present invention. Unless otherwise specified, all technical terms used in the present invention have the same meaning as those generally understood by those skilled in the art to which the present application belongs. The terms used in the present invention are only for describing specific embodiments, and are not intended to limit exemplary embodiments according to the present invention.

[0032] A thrust needle roller bearing assembly, such as Figure 1and Figure 2 As shown, it includes a first roller cage assembly 21, a second roller cage assembly 22 and a spacer 3, wherein the spacer 3 is arranged between the first roller cage assembly 21 and the second roller cage assembly 22, a first gasket 11 is arranged on one side of the first roller cage assembly 21 away from the spacer 3; a second gasket 12 is arranged on one side of the second roller cage assembly 22 away from the spacer 3, and the rollers on the roller cage assembly are cylindrical and embedded in the cage;

[0033] In the embodiment of the present invention, the gasket and roller cage assembly in the present invention do not have a lock, have good processability, and are easy to process. The first gasket 11, the second gasket 12, the first roller cage assembly 21, the second roller cage assembly 22 and the spacer 3 are all split, and there is no assembly relationship between them. They are all independent. When assembling, they only need to contact each other, avoiding mutual interference during high-speed rotation, resulting in a reduction in speed; compared with conventional thrust needle roller bearings, the rated speed is doubled for the same outer diameter size, meeting the large size and high speed requirements of certain structures of hydraulic automatic transmissions. Preventing early wear of the bearing solves technical problems; the present invention is a split bearing, which is easy to disassemble and assemble, and is conducive to inspecting the wear of the bearing.

[0034] like Figure 4 As shown, the first gasket 11 and the second gasket 12 include a flange and a vertical edge. The first gasket 11 and the second gasket 12 are annular, and the flange and the vertical edge are at right angles. The flange is arranged on the side of the vertical edge close to the inner ring, and the size of the vertical edge is consistent with the side wall of the first roller retainer assembly 21. When assembled, the plane of the vertical edge contacts the side wall of the first roller retainer assembly 21; one end of the flange is inserted into the gap between the inner shaft and the outer shaft of the sun gear of the transmission; the cross section of the first gasket 11 and the second gasket 12 cut along the diameter is an L-shaped structure;

[0035] The spacer 3 is provided with a first oil groove 9 for storing oil to facilitate lubrication of the bearing assembly. The first oil groove 9 is provided with a first oil hole 8. The first oil groove 9 is circumferentially arranged on the spacer 3, and the first oil holes 8 are circumferentially arranged in the first oil groove 9 to form a lubricating oil path to lubricate other parts of the lubrication system and to supplement lubrication of the bearing. The thrust needle roller bearing assembly has sufficient lubricating oil paths and oil storage structures, and the thrust needle roller bearing assembly has good lubricity;

[0036] The first gasket 11, the second gasket 12, the first roller cage assembly 21, the second roller cage assembly 22 and the spacer 3 are all made of bearing steel, and there is no special requirement for the material, the processability is good, and the manufacturing cost is low;

[0037] Figure 6 and Figure 7As shown, a transmission for a thrust needle roller bearing assembly comprises a transmission body and a thrust needle roller bearing assembly; Figure 6 This is a cross-sectional view of the assembly relationship between the transmission body and the thrust needle roller bearing. Figure 7 This is a partial enlarged cross-sectional view of the assembly relationship between the transmission body and the thrust needle roller bearing.

[0038] The transmission body includes a mating shaft 4, a left-end mating piece 6 and a right-end mating piece 7, and the thrust needle roller bearing assembly is sleeved on the mating shaft 4; the flange on the first gasket 11 is inserted on the left-end mating piece 6, and the flange of the second gasket 12 is inserted on the left-end mating piece 6. When there is a working condition, the left-end mating piece 6 and the right-end mating piece 7 rotate in opposite directions, and the speed difference is large, and the conventional thrust needle roller bearing cannot meet the high speed requirement.

[0039] The mating shaft 4 is provided with a second oil hole 10 for lubricating the bearing assembly by the oil circuit and a third oil hole 12 for lubricating the left end mating part 6 and the right end mating part 7; the mating shaft 4 is provided with an oil storage groove for storing oil. The mating seat hole part 5 is also provided with a second oil groove 10; in the present invention, sufficient lubricating oil circuits are reserved for the left end mating part 6 and the right end mating part 7, and the lubrication of the left end mating part 6 and the right end mating part 7 is good; the mating seat hole part 5 is a circular ring structure

[0040] The mating seat hole piece 5 is arranged between the left end mating piece 6 and the right end mating piece 7; the thrust needle roller bearing assembly is installed in the hole of the mating seat hole piece 5 of the transmission, providing installation space for the thrust needle roller bearing assembly during high-speed rotation.

[0041] The mating shaft 4 is the driving shaft of the transmission; the clearance fit between the roller retainer assembly and the mating shaft 4 is set to achieve radial positioning, the clearance fit between one end of the left-end mating piece 6 and the first gasket 11 is set to achieve radial positioning, the clearance fit between one end of the right-end mating piece 7 and the second gasket 12 is set to achieve radial positioning, and the clearance fit between the spacer 3 and the mating seat hole piece 5 is set. The roller retainer assembly and the mating seat hole piece 5 are absolute clearance; the absolute clearance means that there is a certain width of clearance between the roller retainer assembly and the mating seat hole piece 5 to prevent interference during rotation, and the spacer 3 and the mating shaft 4 are absolutely clearance fit, and the absolute clearance means that there is a certain width of clearance between the spacer 3 and the mating shaft 4, and the assembly between the two does not interfere, preventing interference during rotation. The mating parts in the present invention are positioned as clearance fit or absolute clearance, and the assembly difficulty is low. There are no special requirements for the structure of the mating shaft 4, the seat hole, the left-end mating piece 6, and the right-end mating piece 7, and the processability is good;

[0042] The fillet of the gasket is smaller than the chamfer of the left end fitting 6 and the right end fitting 7 to prevent interference. The chamfer is a cut chamfer at the fitting of the left end fitting 6 and the right end fitting 7 with the gasket; the left end fitting 6 and the right end fitting 7 are both sun gears of the transmission.

[0043] In the thrust needle roller bearing assembly, the left end fitting 6 and the right end fitting 7 can be radially positioned by external gear matching, and at this time, there is an absolute gap with the matching shaft 4. The left end fitting 6 and the right end fitting 7 can also be radially positioned with the matching shaft 4 through a bushing or a bearing.

[0044] The thrust needle roller bearing assembly described above has a working condition in which the left end fitting 6 and the right end fitting 7 rotate in opposite directions and the speed difference is large, and the conventional thrust needle roller bearing cannot meet the high speed requirement.

[0045] The thrust needle roller bearing assembly is made of common bearing steel for its components; the mating shaft 4, the mating seat hole 5, the left end mating part 6 and the right end mating part 7 are made of common steel, and there is no special requirement for the material. The processability is good and the manufacturing cost is low.

[0046] The installation process is as follows:

[0047] 1) Press one end of the mating seat hole part 5 into the right end mating part 7;

[0048] 2) Press the flange of the second gasket 12 into the right end fitting 7;

[0049] 3) sequentially install the second roller cage assembly 22, the spacer 3, the first roller cage assembly 21, and the first gasket 11 into the hole of the matching seat hole member 5;

[0050] 4) Press the left end fitting 6 onto the first gasket 11.

[0051] 5) Install the whole on the matching shaft 4.

[0052] Since the present invention has two sets of thrust needle roller bearings that are symmetrical and in opposite directions through the spacer 3, compared with conventional thrust needle roller bearings, the rated speed is doubled with the same outer diameter, which meets the large size and high speed requirements of certain structures of hydraulic automatic transmissions, prevents early wear of the bearings, and solves technical problems.

[0053] The spacer 3 and the mating shaft 4 have an absolute clearance, and the roller cage assembly and the mating shaft 4 have a clearance fit, which ensures that the lubricating oil can flow smoothly to the roller; the spacer 3 and the mating shaft 4 have oil storage grooves for easy oil storage. Sufficient lubricating oil circuits and oil storage structures are provided for the thrust needle roller bearing assembly, and the thrust needle roller bearing assembly has good lubricity. The left end mating piece 6 and the right end mating piece 7 have sufficient lubricating oil circuits, and the left end mating piece 6 and the right end mating piece 7 have good lubricity.

[0054] There is no lock in the gasket and retainer assembly, and the processability is good and easy to process. The radial positioning of the mating parts is clearance fit or absolute clearance, and the assembly difficulty is low. There are no special requirements for the structure of the mating shaft 4, the seat hole, the left end mating part 6, and the right end mating part 7, and the processability is good. The materials of the various components of the thrust needle roller bearing assembly are common bearing steel, and the materials of the mating shaft 4, the mating seat hole part 5, the left end mating part 6, and the right end mating part 7 are common steel parts. There are no special requirements for the materials, the processability is good, and the manufacturing cost is low. This thrust needle roller bearing assembly is a split bearing, which is easy to disassemble and assemble, and is conducive to inspecting the wear of the bearing.

[0055] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A transmission for a thrust needle roller bearing assembly, characterized in that: It comprises a transmission body and a thrust needle roller bearing assembly; the thrust needle roller bearing assembly comprises a first gasket (11), a second gasket (12), a first roller retainer assembly (21), a second roller retainer assembly (22) and a spacer (3); the transmission body comprises a mating shaft (4), a left end mating piece (6) and a right end mating piece (7); The spacer (3) is arranged between the first roller retainer assembly (21) and the second roller retainer assembly (22); a first gasket (11) is arranged on a side of the first roller retainer assembly (21) away from the spacer (3); and a second gasket (12) is arranged on a side of the second roller retainer assembly (22) away from the spacer (3); The first gasket (11) and the second gasket (12) comprise a flange and a vertical edge, and the first gasket (11) and the second gasket (12) are both in a circular ring shape; The first gasket (11), the second gasket (12), the first roller retainer assembly (21), the second roller retainer assembly (22) and the spacer (3) are all sleeved on the matching shaft (4); the flange on the first gasket (11) is inserted into the left end matching piece (6), and the flange on the second gasket (12) is inserted into the right end matching piece (7); The spacer (3) is provided with a first oil groove (9), and the first oil groove (9) is provided with a first oil hole (8); The mating shaft (4) is provided with a second oil hole and a third oil hole; the mating shaft (4) is provided with an oil storage tank; The roller retainer assembly and the mating shaft (4) are provided with a clearance fit, one end of the left end mating piece (6) and the first gasket (11) are provided with a clearance fit, one end of the right end mating piece (7) and the second gasket (12) are provided with a clearance fit, and the spacer (3) and the mating seat hole piece (5) are provided with a clearance fit; When the transmission is operating, the first roller retainer assembly (21) and the second roller retainer assembly (22) rotate in opposite directions.

2. A transmission for a thrust needle roller bearing assembly according to claim 1, characterized in that: The first gasket (11), the second gasket (12), the first roller cage assembly (21), the second roller cage assembly (22) and the spacer (3) are all made of bearing steel.

3. A transmission for a thrust needle roller bearing assembly according to claim 1, characterized in that: The thrust needle roller bearing assembly is installed in the matching seat hole of the transmission.

4. A transmission for a thrust needle roller bearing assembly according to claim 1, characterized in that: The left end matching piece (6) and the right end matching piece (7) are both sun gears of the transmission.

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