SU1809197A1 - Cardan shaft compensator bypass device - Google Patents

Description

The invention relates to mechanical engineering and can be used in compensating devices for cardan gears.

The aim of the invention is to develop the design of the bypass device for driveshaft compensators, providing the required degree of sealing of the spline connection of the driveshafts.

In FIG. 1 shows a design of the proposed device containing a spline sleeve 1, a spline shaft 2 having relative to the plug translational movement. The cavity of the plug 3 is filled with grease. To prevent dirt from entering the cavity of the plug, it has a plug 4 with an elastic bypass valve 5, as well as a sealing device 6.

The plug 4 has two bypass holes 7 (see Fig. 2) and one central hole for mounting the valve 5. The sealing surfaces of the valve and the plugs are made spherical. At the same time, to ensure a more tight fit of the sealing surfaces, the radius of the spherical surface of the valve R2 exceeds the radius of the spherical surface of the plug Ri by (30-50) mm. The bypass holes 7 of the plug 4 are located opposite the annular cavity 8 of the valve 5. The annular cavity 8 is filled with grease and is an additional element that isolates the cavity of the plug from the external environment.

I

The proposed device operates as follows.

1809197 A1

With the axial movement of the spline shaft 2 towards the plug 4, the volume of the cavity decreases and a part of the lubricant is squeezed out through the bypass holes 7. Under the pressure of the lubricant, the sealing edges of the valve 5 are lifted and the grease is squeezed out. When the pressure drops due to the reverse movement of the spline shaft 2, under the action of elastic deformations, the edges of the valve 5 return to their original position, providing isolation of the cavity 3 from the external environment. Plastic grease located in the cavity of the plug 4 and valve 5, helps to seal the site. The difference in the radii of the adjacent surfaces of the valve 5 and the plug provides their reliable fit and the possibility of deformation of the edges of the valve 5 when squeezing lubricant from the cavity of the spline fork, which reduces tensile stresses acting on the mounting part 9 of the valve 5.

The proposed design of the transfer device was tested at the stands of the Grodno driveshaft plant and showed high efficiency. It is planned to introduce the proposed device into serial production of cardan shafts for 5 heavy vehicles.

Claims (1)

Claim A bypass device for driveshaft compensators, comprising a blanking plug with bypass holes and a sealing valve, characterized in that, in order to increase the tightness of the spline connection, the plug and sealing valve are made with 15 spherical interaction surfaces, the above mentioned surfaces being made with radii Ri and R ₂ , where R2 = Ri + (30-50 mm); Ri is the radius of the spherical surface of the stub; R ₂ is the radius of the spherical surface of the sealing valve, and the sealing valve is made with an annular cavity for placement of grease in it, located opposite the bypass holes. Figure 2 Compiled by V. Drobyshevsky Editor Tehred M. Morgenthal Corrector N. Revskaya Order 1274 Circulation Subscription VNIIIPI of the State Committee for Inventions and Discoveries under the State Committee for Science and Technology of the USSR 113035, Moscow, Zh-35, Raushskaya nab., 4/5 Production and Publishing Plant Patent · *, Uzhgorod, 101 Gagarin St.