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Intermediate lever for variable valve drive

A technology of transmission and valve, applied in the direction of valve device, engine element, camshaft drive, etc., can solve the problem of limiting the available area of ​​the slope surface, leaving, etc.

Active Publication Date: 2021-08-24
SCHAEFFLER TECH AG & CO KG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Furthermore, in the known embodiments of the bearing surfaces for supporting the spring legs there is the risk that the ends of the spring legs move away from the ramp surface of the ramp body when the return spring is compressed, thereby limiting the usable area of ​​the ramp surface

Method used

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  • Intermediate lever for variable valve drive
  • Intermediate lever for variable valve drive
  • Intermediate lever for variable valve drive

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0060] Thus, in figure 1 and 1a Different perspective views of a first embodiment of an intermediate lever 1 .

[0061] The intermediate lever 1 . 1 is produced in the form of a plate and has two at least partially parallel side walls 2 , 3 which are connected to one another via a ramp body 4 with an outer ramp surface 5 . Between the two side walls 2 , 3 , the tappet roller 6 is mounted rotatably with a ring-cylindrical contact surface 7 on an axle pin 8 , which is pressed into the center of the two side walls 2 , 3 associated holes. On the free ends of the two side walls 2 , 3 , the adjusting and / or supporting roller 9 has two axially outer cylindrical thrust surfaces 10 and a central annular cylindrical thrust surface 11 on the shaft pin. 12, said pin is pressed into associated holes in the two side walls 2, 3. Currently, the diameter of the outer thrust surface 10 of the adjusting and / or support roller 9 is smaller than the diameter of its central thrust surface 11 . ...

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PUM

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Abstract

The invention relates to an intermediate lever of a variable valve drive, which is manufactured in plate construction and has at least one bearing surface for supporting a spring leg of a return spring, and which has two at least sections parallel to each other side walls, wherein the two side walls are connected to each other via a ramp body with an outer ramp surface, wherein tappet rollers are arranged in a rotatable bearing between the two side walls, and wherein at the free ends of the side walls Adjustment and / or support rollers are provided in a rotatably mounted manner. In order to improve the material distribution in the blank part of the central lever, it is proposed that the two side walls are each provided with protruding webs on their outer edges facing the free ends of the spring legs, the webs being formed axially opposite each other on the longitudinal sides. Between the tappet roller and the ramp body and the web each have an outer surface which forms a separate bearing surface or a common bearing surface for supporting the end sections of the spring legs.

Description

technical field [0001] The invention relates to an intermediate lever of a variable valve drive, which is manufactured in plate construction and has at least one bearing surface for supporting a spring leg of a return spring, and which has two at least sections Side walls parallel to each other, wherein the two side walls are connected to each other via a ramp body with an outer ramp surface, wherein a tappet roller is arranged in a rotatable bearing between the two side walls, and wherein the side walls Adjustment and / or support rollers are provided on the free end of the rotatable bearing. Background technique [0002] The variable valve drive known under the BMW AG (BMW AG) designation Valvetronic (electronic valve) of a piston internal combustion engine has: an eccentric shaft rotatable by means of an electric motor, said eccentric shaft having a cam disc; Or the camshaft of the crankshaft of the piston-type internal combustion engine with the gear-belt transmission in ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F01L1/18
CPCF01L1/18F01L13/0063F01L2001/467F01L2013/0068F01L2013/103F01L2250/02F01L2250/04F01L2301/00F01L2303/00F01L2305/00
Inventor 沃尔夫冈·克里斯特根迈克尔·克雷斯迈克尔·库格勒卡特娅·赫夫勒
Owner SCHAEFFLER TECH AG & CO KG