Novel needle bearing assembly

Abstract

The utility model discloses a novel needle bearing assembly, which belongs to needle bearings and comprises a shaft sleeve and a rolling body assembly, and the rolling body assembly is correspondingly sleeved on the periphery of the shaft sleeve. A trapezoid groove is formed in the center of the inner ring of the shaft sleeve in the circumferential direction, a plurality of oil holes communicated with the trapezoid groove are formed in the shaft sleeve in the circumferential direction, and oil inlet grooves corresponding to the oil holes are formed in the periphery of the shaft sleeve. The trapezoid groove is formed in the center of the inner ring of the shaft sleeve in the circumferential direction of the shaft sleeve, a certain space can be reserved between the shaft sleeve and a transmission shaft through the trapezoid groove in the inner circle of the shaft sleeve, lubricating oil can be stored in the space, and meanwhile the lubricating oil can smoothly flow on the inner circumference of the shaft sleeve; oil holes distributed on the circumference of the shaft sleeve can fully lubricate the inner and outer circles of the shaft sleeve; the inlet of the oil inlet groove is of an arc-shaped structure, the oil inlet groove reserves a space for smooth flowing of lubricating oil, and the effects of storing and guiding the lubricating oil can be achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a needle bearing, especially a novel needle bearing assembly. BACKGROUND

[0002] The automobile gearbox bearing is a kind of bearing installed on the transmission shaft of automobile gearbox, due to the need of synchronization and gear shifting between the transmission shaft of automobile gearbox and gear, when the gear of a gear position of gearbox does not transmit power, there will be speed difference between the gear of corresponding gear position and the transmission shaft of gearbox, and needle bearing needs to be installed between the transmission shaft of automobile gearbox and gear.The lubrication condition of needle bearing of automobile gearbox is poor due to the limitation of installation space, which affects its service life.In order to improve the lubrication condition, the existing gearbox needle bearing is generally provided with circumferentially distributed lubricating oil holes on the inner ring (axle sleeve), but the lubrication improvement is limited when the oil holes are less, and too many oil holes increase the processing difficulty and cost, and also affect the rotation strength of rolling body. SUMMARY

[0003] The technical problem solved by the utility model is that a novel needle bearing assembly is provided to effectively improve the lubrication condition, and the rotation of bearing rolling body is not adversely affected, and the working life of needle bearing assembly is improved.

[0004] Technical scheme: the utility model discloses a novel needle bearing assembly, and the needle bearing assembly comprises an axle sleeve and a rolling body assembly, and the rolling body assembly is correspondingly sleeved on the outer periphery of the axle sleeve.

[0005] A trapezoidal groove is formed in the center of the inner ring of the axle sleeve along the circumference thereof, a plurality of oil holes are formed in the circumference of the axle sleeve and communicated with the trapezoidal groove, and an oil inlet groove is arranged on the outer periphery of the axle sleeve and corresponds to the oil hole.

[0006] Preferably, the rolling body assembly comprises a retainer and a plurality of rolling bodies symmetrically distributed in the circumference of the retainer.

[0007] Preferably, the inlet of the oil inlet groove is in the form of a circular arc, the depth of the oil inlet groove is 0.2-0.5mm, and the width of the oil inlet groove is less than the diameter of the oil hole.

[0008] Preferably, the depth of the trapezoidal groove is 0.5-0.7mm.

[0009] Preferably, the included angle of the two sides of the trapezoidal groove is 90°.

[0010] Compared with the prior art, the utility model has at least the following beneficial effects:

[0011] The bushing of this invention has a trapezoidal groove in the center of its inner ring along its circumference. The trapezoidal groove in the inner circle of the bushing allows a certain space to be left between the bushing and the drive shaft. This space can store lubricating oil and allow the lubricating oil to flow smoothly on the inner circumference of the bushing. The oil holes distributed around the bushing can fully lubricate the inner and outer circles of the bushing. The inlet of the oil inlet groove has an arc-shaped structure. The oil inlet groove leaves space for the smooth flow of lubricating oil and can play the role of storing and guiding the lubricating oil. Attached Figure Description

[0012] Figure 1 This is an axial structural cross-sectional view of the needle roller bearing assembly of this utility model;

[0013] Figure 2 for Figure 1 Enlarged schematic diagram of the structure at point A in the middle.

[0014] Reference numerals: 100, needle roller bearing assembly; 1, bushing; 11, trapezoidal groove; 12, oil hole; 13, oil groove; 2, rolling element assembly; 3, cage; 31, limiting groove; 4, rolling element. Detailed Implementation

[0015] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the following will be described in conjunction with the accompanying drawings. Figures 1-2 The technical solutions of the embodiments of this utility model are clearly and completely described below. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the described embodiments of this utility model are within the protection scope of this utility model.

[0016] Example: Figures 1-2 As shown, this utility model discloses a novel needle roller bearing assembly. The needle roller bearing assembly 100 includes a bushing 1 and a rolling element assembly 2, which is fitted onto the outer circumference of the bushing 1. A trapezoidal groove 11 is formed along the circumference of the inner ring of the bushing 1. The depth of the trapezoidal groove 11 is 0.5~0.7mm, and the included angle between the two sides of the groove is 90°. The trapezoidal groove 11 in the inner circle of the bushing 1 allows a certain space to be left between the bushing 1 and the drive shaft. This space can store lubricating oil and allow the lubricating oil to flow smoothly on the inner circumference of the bushing. The bushing 1 has a plurality of oil holes 12 that communicate with the trapezoidal groove 11 in the circumference. The oil holes 12 distributed circumferentially on the bushing 1 can ensure sufficient lubrication of the inner and outer circles of the bushing. An oil inlet groove 13 is provided on the outer circumference of the bushing 1 corresponding to the oil hole 12. The inlet of the oil inlet groove 13 is an arc-shaped structure. The depth of the oil inlet groove 13 is 0.2~0.5mm. The width of the oil inlet groove 13 is smaller than the diameter of the oil hole 12. The oil inlet groove 13 on the outer circle of the bushing provides space for the smooth flow of lubricating oil and can play the role of storing and guiding lubricating oil.

[0017] As Figure 1 shown, the rolling body assembly 2 comprises a retainer 3 and a plurality of rolling bodies 4 symmetrically distributed in double rows on the circumferential direction of the retainer 3, and the circumferential direction of the retainer 3 is provided with two rows of equidistantly arranged limiting grooves 31, and each rolling body 4 is correspondingly rotationally connected in the corresponding limiting groove 31, and since the rolling bodies are in double rows, the oil inlet groove 13 in the middle of the shaft sleeve will not affect the circumferential rotation of the rolling bodies on the outer circle of the shaft sleeve.

[0018] The above is the preferred embodiment of the present application, it should be pointed out that, for those skilled in the technical field, without departing from the principles of the present application, can make a number of improvements and refinements, these improvements and refinements should also be considered as the protection scope of the present application.

Claims

1. A novel needle roller bearing assembly characterized by, The needle roller bearing assembly (100) comprises a sleeve (1) and a rolling body assembly (2) which is correspondingly sleeved on the outer periphery of the sleeve (1); A trapezoidal groove (11) is formed in the center of the inner ring of the sleeve (1) along the circumference thereof, a plurality of oil holes (12) which are communicated with the trapezoidal groove (11) are formed in the circumference of the sleeve (1), and an oil inlet groove (13) is arranged on the outer periphery of the sleeve (1) corresponding to the oil hole (12); the inlet of the oil inlet groove (13) is in a circular arc structure, the depth of the oil inlet groove (13) is 0.2-0.5 mm, and the width of the oil inlet groove (13) is smaller than the diameter of the oil hole (12).

2. The novel needle roller bearing assembly of claim 1, wherein, The rolling body assembly (2) comprises a retainer (3) and a plurality of rolling bodies (4) which are symmetrically distributed in double rows on the circumference of the retainer (3).

3. The novel needle bearing assembly of claim 1, wherein, The depth of the trapezoidal groove (11) is 0.5-0.7 mm.

4. The novel needle bearing assembly of claim 3, wherein, The included angle of the two side surfaces of the trapezoidal groove (11) is 90°.

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