Reciprocating pump

Patent metadata

Field	Value
Publication number	US-10100796-B2
Application number	US-201515511295-A
Country	US
Kind code	B2
Filing date	Jul 14, 2015
Priority date	Sep 15, 2014
Publication date	Oct 16, 2018
Grant date	Oct 16, 2018

Abstract

A reciprocating pump comprising a roller tappet and a pump plunger that is operatively connected to the roller tappet, wherein the roller tappet has a roller support, a roller and a pin, wherein a first bearing eye and a second bearing eye are formed in the roller support, wherein the pin is mounted in the first bearing eye and in the second bearing eye, wherein the roller is arranged on the pin in a rotatable manner, and wherein the pin is mounted more flexibly in the first bearing eye than in the second bearing eye.

First claim

The invention claimed is:

1. A reciprocating pump ( 1 ) comprising a roller tappet ( 2 ) and a pump plunger ( 10 ) that is operatively connected to the roller tappet ( 2 ), wherein the roller tappet ( 2 ) has a roller support ( 3 ), a roller ( 4 ) and a pin ( 5 ), wherein a first bearing eye ( 6 ) and a second bearing eye ( 7 ) are formed in the roller support ( 3 ), wherein the pin ( 5 ) is mounted in the first bearing eye ( 6 ) and in the second bearing eye ( 7 ) and wherein the roller ( 4 ) is arranged on the pin ( 5 ) in a rotatable manner, characterized in that the pin ( 5 ) is mounted more flexibly in the first bearing eye ( 6 ) than in the second bearing eye ( 7 ).

2. The reciprocating pump as claimed in claim 1 , characterized in that the roller support ( 3 ) is arranged in a tappet housing ( 15 ).

3. The reciprocating pump ( 1 ) as claimed in claim 1 , characterized in that the first bearing eye ( 6 ) has a first width (b 6 ) and the second bearing eye ( 7 ) has a second width (b 7 ), wherein the first width (b 6 ) is smaller than the second width (b 7 ).

4. The reciprocating pump ( 1 ) as claimed in claim 1 , characterized in that a cutout ( 8 ) is formed in the first bearing eye ( 6 ).

5. The reciprocating pump ( 1 ) as claimed in claim 4 , characterized in that the cutout ( 8 ) is a reduction of the wall thickness of the first bearing eye ( 6 ).

6. The reciprocating pump ( 1 ) as claimed in claim 4 , characterized in that the first bearing eye ( 6 ) is expandable in a flexible manner.

7. The reciprocating pump ( 1 ) as claimed in claim 4 , characterized in that the cutout ( 8 ) is a continuous slot, so that the first bearing eye ( 6 ) comprises two bearing legs that are separated from one another on one side.

8. The reciprocating pump ( 1 ) as claimed in claim 4 , characterized in that the pin ( 5 ) is clamped into the first bearing eye ( 6 ) and pressed into the second bearing eye ( 7 ).

9. The reciprocating pump ( 1 ) as claimed in claim 4 , characterized in that a further cutout is formed in the second bearing eye ( 7 ).

10. The reciprocating pump ( 1 ) as claimed in claim 9 , characterized in that the further cutout is a reduction of the wall thickness of the second bearing eye ( 7 ).

11. The reciprocating pump ( 1 ) as claimed in claim 9 , characterized in that the pin ( 5 ) is clamped into the first bearing eye ( 6 ) and into the second bearing eye ( 7 ).

12. A fuel injection system having a reciprocating pump ( 1 ) as claimed in claim 1 .

13. The fuel injection system as claimed in claim 12 , characterized in that the roller support ( 3 ) is arranged in a tappet housing ( 15 ).

14. The fuel injection system as claimed in claim 12 , characterized in that the first bearing eye ( 6 ) has a first width (b 6 ) and the second bearing eye ( 7 ) has a second width (b 7 ), wherein the first width (b 6 ) is smaller than the second width (b 7 ).

15. The fuel injection system as claimed in claim 12 , characterized in that a cutout ( 8 ) is formed in the first bearing eye ( 6 ).

16. The fuel injection system as claimed in claim 15 , characterized in that the cutout ( 8 ) is a reduction of the wall thickness of the first bearing eye ( 6 ).

17. The fuel injection system as claimed in claim 15 , characterized in that the first bearing eye ( 6 ) is expandable in a flexible manner.

18. The fuel injection system as claimed in claim 15 , characterized in that the cutout ( 8 ) is a continuous slot, so that the first bearing eye ( 6 ) comprises two bearing legs that are separated from one another on one side.

19. The fuel injection system as claimed in claim 15 , characterized in that the pin ( 5 ) is clamped into the first bearing eye ( 6 ) and pressed into the second bearing eye ( 7 ).

20. The fuel injection system as claimed in claim 15 , characterized in that a further cutout is formed in the second bearing eye ( 7 ).

Assignees

• Bosch Gmbh Robert

Inventors

• Graspeuntner Christian

Classifications

• F04B1/0408

  Pistons · CPC title

• F04B1/0426

  Arrangements for pressing the pistons against the actuated cam; Arrangements for connecting the pistons to the actuated cam · CPC title

• F04B17/05

  driven by internal-combustion engines · CPC title

• F05C2251/02

  Elasticity · CPC title

• F04B15/00

  Pumps adapted to handle specific fluids, e.g. by selection of specific materials for pumps or pump parts · CPC title