LUBRICANT COVER

Claims

1. A cover (A) for lubrication, which provides an inflow and outflow of air in the internal volume (H) to ensure axial movement of the sliding sleeve (K), which is one of the components of the cardan shaft and is subject to minimal stress, and at the same time prevents the flow (leakage) of lubricant from the sliding sleeve (K) into the pipe (B), characterized in that it contains: - a diaphragm (2) having at least one passage (21) for air circulation in the internal volume (H) to prevent leakage of lubricant from said sliding sleeve (K), - the main part (1) for connecting the said diaphragm (2) with the sliding sleeve (K), - a centering surface (11) allowing the main part (1) to be connected to the sliding sleeve (K) with a tight fit without the need for any connecting operations or fasteners.

2. A cover (A) for lubrication according to claim 1, characterized in that it comprises a shoulder surface (12) preventing movement of the main part (1), connected to said sliding sleeve (K), on the first axis (E1) in the direction of said sliding sleeve (K).

3. The cover (A) for lubrication according to claim 1, characterized in that it contains a support surface (13) allowing said main part (1), in the event of its movement on the first axis (E1) in the direction of the pipe (B), both to stop the movement of said main part (1) on the first axis (E1) and to maintain its perpendicularity to the first axis (E1).

4. The cover (A) for lubrication according to claim 3, characterized in that it comprises a support surface (13) for maintaining the perpendicularity of said main part (1) of the first axis (E1) with a deviation of no more than five plus or minus five degrees, when the main part (1) moves in the direction of the pipe (B) on the first axis (E1).

5. The cover (A) for lubrication according to claim 3, characterized in that it comprises a supporting surface (13) with a diameter greater than the diameter of the centering surface (11) and less than the diameter of the inner surface (B1) of the pipe.

6. A cover (A) for lubrication according to claim 3, characterized in that it comprises a support surface (13) with a radius in the shape at the points of contact with the inner surface (B1) of the pipe.

7. A cover (A) for lubrication according to claim 1, characterized in that it contains a diaphragm (2) made of an elastomeric material.

8. A cover (A) for lubrication according to claim 7, characterized in that it contains a diaphragm (2) made of a rubber material.

9. A cover (A) for lubrication according to claim 1, characterized in that it contains a plurality of passages (21) arranged in a spiral on the diaphragm (2) to ensure a uniform flow of air in the specified internal volume (H).

10. The cover (A) for lubrication according to claim 1, characterized in that it is located on said sliding sleeve (K) and it contains passages (21) having a spring geometry to prevent the leakage of lubricant, which is a semi-solid lubricant.

11. A lubricating cover (A) according to claim 1, characterized in that it comprises a main part (1), preferably made of a metal or plastic material, for connection with a diaphragm (2) so as to surround said diaphragm (2) and provide a rigid structure.

12. The cover (A) for lubrication according to claim 1, characterized in that it contains a centering surface (11) having a circular geometry with a tolerance and diameter that ensure a tight fit.

13. A cover (A) for lubrication according to claim 1, characterized in that said centering surface (11) comprises a radius shape (111) at its ends in order to provide an opening for engaging said centering surface (11) with said sliding sleeve (K).

14. The cover (A) for lubrication according to claim 3, characterized in that it comprises a diaphragm (2) which is connected to the main part (1) near the support surface (13) on the first axis (E1), to protect it from the thermal effects of the welding process used in connecting the said pipe (B) and the sliding sleeve (K), and to increase the internal volume (H).