Sliding strut bearing
View Patent ↗The sliding strut bearing has two rigid body positioned in a plastic housing and a synthetic resin sliding bearing positioned between the two rigid bodies. The rigid bodies are metal and provide structural rigidity allowing a spring seat to be incorporated into the plastic housing and an overall reduction in the height of the bearing.
1. A sliding strut bearing comprising:
a plastic housing which has a through hole for accommodating a rod of a strut, the housing having an inner wall which defines the through hole and encircles the rod;
a flanged, cylindrical annulus in the housing, the annulus having a cylindrical hollow axially aligned with the through hole and a thrust hollow extending radially outward from the cylindrical hollow, the thrust hollow in a flanged portion of the annulus, the cylindrical hollow having an inside and outside inner wall which are axially aligned with the through hole, the thrust hollow having a top inner wall that extends radially outward from the inside inner wall and a bottom inner wall that extends radially outward from the outside inner wall;
a inner rigid body abutting the inside and top inner wall;
an outer rigid body abutting the outside and bottom inner wall; and
a synthetic resin sliding bearing body positioned between the inner and outer rigid body.
2. The bearing of claim 1 , wherein
the housing comprises:
an upper plastic housing having an inner plastic sleeve for encircling the rod and an upper plastic ledge affixed to and extending radially outward from the inner plastic sleeve;
a lower plastic housing mating, from below, with the upper plastic housing and having an outer plastic sleeve spaced apart and encircling the inner plastic sleeve and a lower plastic ledge affixed to and extending from the outer plastic sleeve, the lower plastic ledge spaced apart from the upper plastic ledge;
a bottom seal formed between a bottom axial edge of the inner plastic sleeve and a bottom axial edge of the outer plastic sleeve;
a top seal formed between an outer radial edge of the upper plastic ledge and an outer radial edge of the lower plastic ledge;
the cylindrical hollow is formed between the inner plastic sleeve and the outer plastic sleeve;
the thrust hollow formed between the upper plastic ledge and the lower plastic ledge;
an inner metal washer means abutting an inner wall of the inner plastic sleeve and an inner wall of the upper plastic ledge and positioned in the annulus.
3. The bearing of claim 1 , wherein
the inner rigid body comprises an inner sleeve in the cylindrical hollow, abutting the inside inner wall and axially aligned with the through hole, and a separate upper thrust washer in the thrust hollow, abutting the top inner wall and axially aligned with the through hole;
the outer rigid body comprises an outer sleeve in the cylindrical hollow, abutting the outside inner wall and axially aligned with the through hole, and a separate lower thrust washer in the thrust hollow, abutting the bottom inner wall and axially aligned with the through hole; and
the synthetic resin bearing body comprises a synthetic resin sliding sleeve between the inner and outer sleeve and a separate synthetic resin sliding thrust washer between the upper and lower thrust washer.
4. The bearing of claim 1 , wherein
the inner rigid body is a unitary body comprising an inner sleeve in the cylindrical hollow, abutting the inside inner wall and axially aligned with the through hole and an upper thrust washer in the thrust hollow, abutting the top inner wall and the upper thrust washer extending radially outward from the top of the inner sleeve;
the outer rigid body comprises an outer sleeve in the cylindrical housing abutting the outside inner wall and axially aligned with the through hole and a separate lower thrust washer in the thrust hollow abutting the bottom inner wall and axially aligned with the through hole; and
the synthetic resin sliding bearing body is a unitary body comprising a synthetic resin sliding between the inner and outer sleeve and a synthetic resin sliding thrust washer between the upper and lower thrust washer, the synthetic resin sliding thrust washer extending radially outward from the synthetic resin sliding sleeve.
5. The bearing of claim 4 , wherein
the synthetic resin sliding bearing body is affixed to the inner rigid body.
6. The bearing of claim 1 , wherein
the inner rigid body comprises an inner sleeve in the cylindrical hollow abutting the inside inner wall and axially aligned with the through hole, and a separate upper thrust washer in the thrust hollow, abutting the top inner wall and axially aligned with the through hole;
the outer rigid body is a unitary body comprising an outer sleeve in the cylindrical hollow, abutting the outside inner wall and a lower thrust washer in the thrust hollow, abutting the bottom inner wall, the lower thrust washer extending radially outward from the top of the outer sleeve; and
the synthetic resin sliding bearing body is a unitary body comprising a synthetic resin sliding sleeve between the inner and outer sleeve and a synthetic resin sliding thrust washer between the upper and lower thrust washer, the synthetic resin sliding thrust washer extending radially outward from the synthetic resin sliding sleeve.
7. The bearing of claim 6 , wherein
the synthetic resin sliding bearing body is affixed to the outer rigid body.
8. The bearing of claim 1 , wherein
the inner rigid body is a unitary body comprising an inner sleeve in the cylindrical hollow, abutting the inside inner wall and axially aligned with the through hole and an upper thrust washer in the thrust hollow, abutting the top inner wall, the upper thrust washer extending radially outward from the top of the inner sleeve;
the outer rigid body is a unitary body comprising an outer sleeve in the cylindrical hollow, abutting the outside inner wall and lower thrust washer in the thrust hollow, abutting the bottom inner wall, the lower thrust washer extending radially outward from the top of the outer sleeve; and
the synthetic resin sliding bearing body is a unitary body comprising a synthetic resin sliding sleeve between the inner and outer sleeve and a synthetic resin sliding thrust washer between the upper and lower thrust washer, the synthetic resin sliding thrust washer extending radially outward from the synthetic resin sliding sleeve.
9. The bearing of claim 8 , wherein
the synthetic resin sliding bearing body is affixed to the outer rigid body.
10. The bearing of claim 1 , wherein
the synthetic resin is polytetrafluoroethylene (PTFE).
11. The bearing of claim 1 , wherein
the rigid body is made of ceramic or metal, and
the metal is steel, aluminum or brass.
12. The bearing of claim 1 , wherein
the housing has a spring seat for a spring of the strut on an outer wall of the housing.
13. The bearing of claim 1 , wherein
the housing has a jounce bumper support cup affixed to and extending axially downward from an outside wall of the housing.
14. A sliding strut bearing comprising:
a plastic housing which has a through hole for accommodating a rod of a strut 1 the housing having an inner wall which defines the through hole and encircles the rod;
a flanged 1 cylindrical annulus in the housing 1 the annulus having a cylindrical hollow axially aligned with the through hole and a thrust hollow extending radially outward from the cylindrical hollow, the thrust hollow in a flanged portion of the annulus, the cylindrical hollow having an inside and outside inner wall which are axially aligned with the through hole, the thrust hollow having a top inner wall that extends radially outward from the inside inner wall and a bottom inner wall that extends radially outward from the outside inner wall;
an inner rigid body abutting the top inner wall;
an outer rigid body abutting the outside and bottom inner wall; and
a synthetic resin sliding bearing body positioned between the outer rigid body and the inner rigid body and inside inner wall.
15. The bearing of claim 14 , wherein
the housing comprises:
an upper plastic housing having an inner plastic sleeve for encircling the strut and an upper plastic ledge affixed to and extending radially outward from the inner plastic sleeve;
a lower plastic housing mating, from below with the upper plastic housing and having an outer plastic sleeve spaced apart and encircling the inner plastic sleeve and a lower plastic ledge affixed to and extending from the outer plastic sleeve I the lower plastic ledge spaced apart from the upper plastic ledge;
a bottom seal formed between a bottom axial edge of the inner plastic sleeve and a bottom axial edge of the outer plastic sleeve;
a top seal formed between an outer radial edge of the upper plastic ledge and an outer radial edge of the lower plastic ledge;
the cylindrical hollow is formed between the inner plastic sleeve and the outer plastic sleeve;
a thrust hollow is formed between the upper plastic ledge and the lower plastic ledge.