CN2104777U

CN2104777U - Spacing sleeve

Info

Publication number: CN2104777U
Application number: CN 91224022
Authority: CN
Inventors: 童荣初; 毛云; 袁镇庆; 孙绍峰
Original assignee: VEHICLE BRIDGE PLANT BEIJING GEAR GENERAL PLANT
Current assignee: VEHICLE BRIDGE PLANT BEIJING GEAR GENERAL PLANT
Priority date: 1991-09-03
Filing date: 1991-09-03
Publication date: 1992-05-20

Abstract

The utility model provides a spacing sleeve for adjusting the main speed reducer for automobile rear axle and the pre-tightening force of the initiative bevel support bearing. The utility model is characterized in that the spacing sleeve is a wave-shaped sleeve with thick wall, a frustum cone shape, and a single section. The ordinary tubular spacing sleeve and adjusting shim are replaced with the utility model, and no stage adjustment is realized. The spacing sleeve has the advantages of flexible control, rapid speed for adjusting the pre-tightening force of bearing, and convenient and reliable use. The pre-tightening force of bearing meets 4-6 kg requirement.

Description

spacing sleeve

The utility model relates to a kind of spacer that is used for adjusting automobile axle main reduction gear drive bevel gear block bearing predetermincd tension.

Drive bevel gear supports with two cone bearings in the automobile axle main reduction gear, the bearing fitness for purpose has certain predetermincd tension, the common service adjustment sheet of drive bevel gear block bearing predetermincd tension is adjusted, wherein mostly again is that two bearings outer ring distance is fixed, distance with increase and decrease two bearings inner ring is adjusted, spacer is arranged between the two bearings, it is a thick-walled sleeve, on the drive bevel gear axle shaft shoulder is arranged, at spacer or the shaft shoulder front bearing cap shim is housed, the thickness of increase and decrease pad can change the distance after the two bearings inner ring compresses, thereby makes bearing pre-fastening obtain adjusting.But there is following defective in this fixed setting: the increase and decrease combination of pad is limited, can't accomplish stepless adjustment, in assembling, often occur being adhered to specification by the axial location of dress parts, and off-gage phenomenon appears in the assembly overall target of assembling out, it is false error, takeing for is waste product, simultaneously not only will be in fitting process with assembler's experience, and usually need repeated disassembled and assembled, replacing parts can satisfy the requirement of predetermincd tension, so assembling bothers, efficient is low, and unreliable again.

The purpose of this utility model provides a kind of rapid, easy, adjust a bearing predetermincd tension spacer reliably.

The utility model is achieved in that the heavy wall tubulose spacer that will be used for adjusting automobile axle main reduction gear drive bevel gear block bearing predetermincd tension makes truncated cone single-unit waveform cover into, the waveform district of this waveform cover is the arc surface of radial protrusion, arc surface two ends and circular conical surface connecting portion are fillet surface, and push up the radially angle α of the circular arc of a side=20 °～30 ° near circular cone, near the radially angle β of the circular arc of conical bottom one side=40 °～50 °.

This truncated cone single-unit waveform cover is enclosed within on the drive bevel gear axle, and (the awl end one side is towards drive bevel gear) replaces original spacer and bearing cap shim between two block bearings, carries out the predetermincd tension adjustment of bearing.Because this waveform is enclosed within when being subjected to axle pressure, its waveform district is easy to generate axial deformation, and when axle pressure greater than its elastic deformation force during less than its plastic deformation destructive force, the waveform district axially changes bigger, make axle pressure keep adjusting within the specific limits when utilizing this characteristic assembling, the cumulative errors of compensation dimensional chain for assembly are up to the requirement of satisfying bearing pre-fastening.When therefore advantage of the present utility model is that this waveform is enclosed within the adjust a bearing predetermincd tension, not only can carry out stepless adjustment, play the flexible control effect, do not produce false off-gage phenomenon, and in fitting process, need not repeated disassembled and assembled, change parts and join, so assemble rapidly, easy, reliable, improved work efficiency, assembling one-time-reach-place rate is reached more than 98%.

Now in conjunction with the accompanying drawings and embodiments the utility model is done and is described in further detail:

Fig. 1 is the axial section scheme drawing of spacer;

Fig. 2 is the left view of spacer;

Fig. 3 is the characteristic line scheme drawing of spacer.

As depicted in figs. 1 and 2; a kind of spacer of adjust a bearing predetermincd tension is a truncated cone single-unit waveform cover; the waveform district of this waveform cover is the arc surface of radial protrusion R=5mm; arc surface two ends and circular conical surface connecting portion are the fillet surface of r=1～5mm; and the radially angle α of the circular arc of the close vertex of a cone one side=25 °; the radially angle β of the circular arc of the close awl end one side=45 °; the waveform cover is by dead-soft steel (10#; 20# or A3 steel) make; highly be 57 ± 0.15mm, the waveform zone centerline is from conical bottom 28mm, and vertex of a cone diameter is φ 30.6 ± 0.3mm; cone bottom diameter is φ 35.6 ± 0.3mm, and wall thickness is 2.2 ± 0.25mm.

The spacer characteristic line as shown in Figure 3, during beginning, along with the increase of axial load P, the deflection in waveform cover waveform district is also along with increase, after axial load was stabilized in 45 kNs, deflection continued to increase the significant change that does not cause load.Utilize the bearing pre-fastening of the utility model adjustment to reach the 4-6 kilogram, satisfy actual requirement fully.

Claims

1, a kind of heavy wall tubulose spacer that is used for adjusting automobile axle main reduction gear drive bevel gear block bearing predetermincd tension, it is characterized in that the single-unit waveform cover that said heavy wall tubulose spacer is a truncated cone, the waveform district of this waveform cover is the arc surface of radial protrusion, arc surface two ends and circular conical surface connecting portion are fillet surface, and push up the radially angle α of the circular arc of a side=20 °～30 ° near circular cone, near the radially angle β of the circular arc of conical bottom one side=40 °～50 °.

2, according to the said a kind of spacer of claim 1, it is characterized in that it is made by dead-soft steel, the waveform district of this waveform cover is the arc surface of the R=5mm of radial protrusion, arc surface two ends and circular conical surface connecting portion are the fillet surface of r=1～5mm, and push up the radially angle α of the circular arc of a side=25 ° near circular cone, near the radially angle β of the circular arc of conical bottom one side=45 °.