System For Securing Together by Means of Press-Fitting a Casing and a Cover of a Housing Element

Patent metadata

Field	Value
Publication number	US-2021062868-A1
Application number	US-202017006948-A
Country	US
Kind code	A1
Filing date	Aug 31, 2020
Priority date	Sep 3, 2019
Publication date	Mar 4, 2021
Grant date	—

Abstract

A housing element for applications in the manufacturing industry having a casing and a cover both made of metallic material, wherein the casing is provided with a groove and a flat mounting surface and the cover is provided with an end portion having a frustoconical side wall, an oblique annular bottom wall, and a securing system consisting in inserting the end portion of the cover inside the groove of the casing, wherein an interference (i) between a radially outer end of the end portion of the cover and a radially inner end of the flat mounting surface of the casing assumes values of between 0.2 mm and 0.5 mm and an angle (δ) defined between the frustoconical side wall of the end portion of the cover and the flat mounting surface of the casing assumes values of between 45° and 80°. The interference and the angle facilitate the insertion of the end portion of the cover inside the groove of the casing.

First claim

1 . A housing element comprising:
a metallic casing provided with a groove and a flat mounting surface, and
a metallic cover provided with: an end portion having a truncated cone-shaped side wall, an annular wall, and an oblique bottom wall, wherein the metallic casing and the metallic cover are configured such that an interference (i) between a radially outer end of the end portion of the cover and a radially inner end of the flat mounting surface of the metallic casing is between 0.2 mm and 0.5 mm, and
an angle (δ) defined between the truncated cone-shaped side wall of the end portion of the cover and the flat mounting surface of the metallic casing takes values between 45° and 80°.

2 . The housing element of claim 1 , wherein the interference (i) assumes is 0.4 mm and the angle (δ) is 62°.

3 . The housing element of claim 1 , wherein the truncated cone-shaped side wall and the bottom wall of the end portion of the cover define an angle (α) ranging between 50° and 60°.

4 . The housing element of claim 1 , wherein the end portion of the cover is provided with a plurality of radial cuts of a size ranging from 0.7 mm to 1 mm.

5 . The housing element of claim 4 , wherein the plurality of radial cuts includes between 12 and 18 radial cuts.

6 . The housing element of claim 1 , wherein the truncated cone-shaped side wall and the bottom wall of the end portion of the cover define a connecting radius (r) that is greater than 1 mm.

7 . The housing element of claim 1 , wherein the truncated cone-shaped side wall has an angle (β) with respect to an axial direction defined by an axis (X) and whose value is about 42°.

8 . The housing element of claim 1 , wherein the groove of the metallic casing has a length (l) of about 3 mm and a depth (p) of about 0.7 mm, said values of the length (l) and of the depth (p) being related to the value of the angle (α) defined between the truncated cone-shaped side wall and the bottom wall of the end portion of the cover.

9 . The housing element of claim 7 , wherein the flat mounting surface of the metallic casing forms an angle (γ) whose value is about 20°, said value being correlated with the value of the angle (β) defined between the truncated cone-shaped side wall of the cover and the axial direction.

9 . The housing element of claim 1 , wherein the cover has an axisymmetric shape around the axis (X) and is formed by a metal sheet of thickness (s) comprised between 0.8 mm and 1.2 mm.

10 . The housing element of claim 1 , wherein the cover comprises a side wall provided with the end portion and an intermediate portion which has an annular groove to increase the stiffness of the cover.

11 . A housing element for applications in the manufacturing industry comprising a casing and a lid both of metallic material, wherein
the casing is provided with a groove and a flat mounting surface, and the cover is provided with an end portion comprising a truncated cone-shaped side wall and an annular and oblique bottom wall, said housing element being characterized by a system for anchoring the cover on the casing consisting in housing the end portion of the cover in the groove of the casing and in which:
an interference (i) between a radially outer end of the end portion of the cover and a radially inner end of the flat mounting surface of the casing assumes values comprised between 0.2 mm and 0.5 mm to facilitate the insertion of the end portion of the cover in the groove of the casing, and
an angle (δ) defined between the truncated cone-shaped side wall of the end portion of the cover and the flat mounting surface of the casing takes values between 45° and 80°, said angle being equally useful for facilitating the insertion of the end portion of the cover in the groove of the casing.

12 . A housing element comprising:
a metallic casing provided with a groove and a flat mounting surface, and a metallic cover provided with: an end portion having a truncated cone-shaped side wall, an annular wall, and an oblique bottom wall, wherein the metallic casing and the metallic cover are configured such that an interference (i) between a radially outer end of the end portion of the cover and a radially inner end of the flat mounting surface of the metallic casing is between 0.2 mm and 0.5 mm, and an angle (δ) defined between the truncated cone-shaped side wall of the end portion of the cover and the flat mounting surface of the metallic casing takes values between 45° and 80°, wherein the interference (i) assumes is 0.4 mm and the angle (δ) is 62°, further wherein the truncated cone-shaped side wall and the bottom wall of the end portion of the cover define an angle (α) ranging between 50° and 60°, further wherein the end portion of the cover is provided with a plurality of radial cuts of a size ranging from 0.7 mm to 1 mm, further wherein the truncated cone-shaped side wall and the bottom wall of the end portion of the cover define a connecting radius (r) that is greater than 1 mm, further wherein the truncated cone-shaped side wall has an angle (β) with respect to an axial direction defined by an axis (X) and whose value is about 42°, further wherein the groove of the metallic casing has a length (l) of about 3 mm and a depth (p) of about 0.7 mm, said values of the length (l) and of the depth (p) being related to the value of the angle (α) defined between the truncated cone-shaped side wall and the bottom wall of the end portion of the cover, further wherein the flat mounting surface of the metallic casing forms an angle (γ) whose value is about 20°, said value being correlated with the value of the angle (β) defined between the truncated cone-shaped side wall of the cover and the axial direction, further wherein the cover has an axisymmetric shape around the axis (X) and is formed by a metal sheet of thickness (s) comprised between 0.8 mm and 1.2 mm, wherein the cover comprises a side wall provided with the end portion and an intermediate portion which has an annular groove to increase the stiffness of the cover.

13 . The housing element of claim 12 , wherein the metallic casing is made of cast iron and the metallic cover is made of steel.

14 . The housing element of claim 1 , wherein the metallic casing is made of cast iron and the metallic cover is made of steel.

Assignees

• Skf Ab

Inventors

• Baracca Fausto
• Bertolini Andrea A
• Falaschi Fabio
• Frezza Pasquale
• Colomba Alessio Nebbia

Classifications

• F16C35/00

  Rigid support of bearing units; Housings, e.g. caps, covers (F16C23/00 takes precedence) · CPC title

• F16C33/72

  Sealings · CPC title

• B23P19/02 Primary

  for connecting objects by press fit or for detaching same (B23P19/10 takes precedence) · CPC title

• F16B4/004

  Press fits, force fits, interference fits, i.e. fits without heat or chemical treatment (F16B4/002 takes precedence) · CPC title

• F16C33/783

  of the mounting region · CPC title