CN87201623U

CN87201623U - Bearing

Info

Publication number: CN87201623U
Application number: CN 87201623
Authority: CN
Inventors: 张建国
Original assignee: JINING BEARING FACTORY SHANDONG PROV
Current assignee: JINING BEARING FACTORY SHANDONG PROV
Priority date: 1987-06-15
Filing date: 1987-06-15
Publication date: 1988-05-25

Abstract

The utility model discloses a rolling bearing used for the shaft of the gearbox of a miniature four-wheel tractor. An eccentricity is formed between the center of the inner hole of the inner ring of the rolling bearing and the shaft line of the cylinder of an outer ring, the eccentric distance is between 4 mm and 8 mm, and the eccentric rolling bearing solves the problem that eccentric shafts are utilized in the prior art.

Description

Bearing

The utility model relates to the supporting member of one of small four-wheel tractor gearbox, relates in particular to the eccentric rolling bearing of one of small four-wheel tractor gearbox.

One of the small four-wheel tractor gearbox of prior art adopts the GB276/64 single-row radial ball bearing to make supporting member, but one of this gearbox adopts eccentric shaft, cause actual not matching of bearing and gearbox, and the bearing basic static capacity (BSC) rating of prior art and dynamic load can not meet the demands all.

The purpose of this utility model is to overcome the shortcoming of known technology, provides a kind of and is suitable for and supporting eccentric rolling bearing of small four-wheel tractor gearbox.

The said eccentric rolling bearing of the utility model, ring diameter of bore is 25 to 35 millimeters in it, an off-centre is arranged, 4 to 8 millimeters of throw of eccentric between the interior ring endoporus center of circle and the outer shroud cylindrical axis, 65 to 75 millimeters of outer ring diameters, key is wide 6 to 10 millimeters, 14 to 18 millimeters of outer race width, 16 to 20 millimeters of bearing inner ring width, bearing adopts 50 to 65 of solid matter needle rollers, 2,5 to 4 millimeters of needle roller diameters, 9 to 14 millimeters of needle roller length adopt double-deck back-up ring can guarantee the reliability of bearing.

Accompanying drawing is the schematic representation that meets the utility model theme.

Fig. 1 is a plan view of the present utility model, and Fig. 2 is the A-A sectional view of Fig. 1.

Now in conjunction with Fig. 1 and Fig. 2, with 30 millimeters of diameter of bores, 6 millimeters of throw of eccentric, 70 millimeters of outer ring diameters, key is wide 8 millimeters, 16 millimeters of outer race width, 18.5 millimeters of bearing inner ring width, 57 of solid matter needle rollers, 3 millimeters of needle roller diameters, 9.8 millimeters of needle roller length, adopting the eccentric rolling bearing of double-deck back-up ring is example, is described as follows:

Outer shroud 1 is the outer rolling body of the said eccentric rolling bearing of the utility model, and outer shroud 1 is made circular movement around interior ring 2.In ring 2 are interior rolling elements of rolling bearing, mainly play a part eccentric and by key with spool be connected.Needle roller 3 rolls between outer shroud 1 and interior ring 2, and outer back-up ring 4 is a check ring, and main rising blocked inner shield ring 5, prevents inner shield ring 5, and needle roller 3 and outer shroud 1 are done axial motion.Inner shield ring 5 is carburizing or nitriding treatment spare, the axial rub life-span of mainly playing the raising bearing.

Claims

1, the rolling bearing of a usefulness of microtractor gearbox, by outer shroud 1, interior ring 2, needle roller 3, outer back-up ring 4 and inner shield ring 5 formed, and it is characterized in that has an off-centre between the endoporus center of circle of bearing inner ring and the outer shroud cylindrical axis, and the diameter of bore of interior ring 2 is 25 to 35 millimeters, 4 to 8 millimeters of endoporus throw of eccentric, 16 to 20 millimeters of the width of interior ring 2.

2, according to the said rolling bearing of claim 1, it is characterized in that 65 to 75 millimeters of the external diameters of outer shroud 1,14 to 18 millimeters of outer ring widths, key is wide 6 to 10 millimeters.

3,, it is characterized in that 2,5 to 4 millimeters of needle roller 3 diameters, 9 to 14 millimeters of length, 50 to 65 of quantity according to the said rolling bearing of claim 1.

4, according to the said rolling bearing of claim 1, it is characterized in that bearing adopts double-deck back-up ring, outer back-up ring 4 is a check ring.