Belt cover structure for internal combustion engine

Patent metadata

Field	Value
Publication number	US-12140106-B2
Application number	US-202218557163-A
Country	US
Kind code	B2
Filing date	Apr 25, 2022
Priority date	Apr 30, 2021
Publication date	Nov 12, 2024
Grant date	Nov 12, 2024

Abstract

Provided is a belt cover of an internal combustion engine having ease of attachment and detachment and sealability.
A belt cover structure for an internal combustion engine includes an oil pump case OP and a lower cover 9 that cover a timing belt TB, and a side mount bracket 8 that is adjacent to an upper side of the lower cover 9 and is held by a cylinder block CB. Mating surfaces 96 c and 86 c that are aligned with each other are respectively formed on the lower cover 9 and the side mount bracket 8 . A lower seal member 41 is disposed on the mating surface 96 c , and the mating surface 86 c is configured to cover the mating surface 96 c from the outside. The lower cover 9 and the side mount bracket 8 are fixed in a state where the mating surface 86 c of the side mount bracket 8 is pressed against the mating surface 96 c of the lower cover 9 via the seal member 41.

First claim

The invention claimed is:

1. A belt cover structure for an internal combustion engine that is disposed on one side surface of an internal combustion engine body and houses at least a part of a timing belt that transmits power between a crankshaft and a camshaft, the belt cover structure comprising:
an inner cover member that covers the timing belt on a side closer to the internal combustion engine than the timing belt; and
an outer cover member that covers the timing belt on a side farther from the internal combustion engine than the timing belt,
the outer cover member including at least a lower outer cover member that covers a periphery of the crankshaft, wherein
the internal combustion engine body holds a side mount bracket that is disposed adjacent to an upper side of the lower outer cover member,
mating surfaces that are aligned with each other are respectively formed on the lower outer cover member and the side mount bracket,
a lower seal member that seals the lower outer cover member and the side mount bracket is disposed on the mating surface of the lower outer cover member,
the mating surface of the side mount bracket is configured to cover the mating surface of the lower outer cover member from an outside, and
the lower outer cover member and the side mount bracket are fixed in a state where the mating surface of the side mount bracket is pressed against the mating surface of the lower outer cover member via the lower seal member,
a water pump case is disposed on the one side surface of the internal combustion engine body,
the side mount bracket has an end portion on one side in a width direction that is a direction perpendicular to an axial direction of the crankshaft, the end portion on the one side being configured to cover the water pump case, and has an end portion on another side in the width direction, the end portion on the other side being configured to be fixed to an outer surface of the water pump case, and
the side mount bracket is configured to be moved to the other side when the side mount bracket is attached and the side mount bracket is configured to be moved to the one side when the side mount bracket is detached.

2. A belt cover structure for an internal combustion engine that is disposed on one side surface of an internal combustion engine body and houses at least a part of a timing belt that transmits power between a crankshaft and a camshaft, the belt cover structure comprising:
an inner cover member that covers the timing belt on a side closer to the internal combustion engine than the timing belt; and
an outer cover member that covers the timing belt on a side farther from the internal combustion engine than the timing belt,
the inner cover member including at least an upper inner cover member that covers a periphery of the camshaft,
the outer cover member including at least an upper outer cover member that covers a periphery of the camshaft, wherein
a water pump case is disposed on the one side surface of the internal combustion engine body so as to be adjacent to a lower side of the upper inner cover member,
a side mount bracket that covers the water pump case on a side farther from the internal combustion engine than the water pump case is disposed,
the upper outer cover member is fixed to an upper side of the side mount bracket via a first seal member provided on the side mount bracket,
the upper inner cover member is fixed to an upper side of the side mount bracket and an upper side of the water pump case via a second seal member provided on the side mount bracket, and
an end portion of the first seal member and an end portion of the second seal member are disposed so as to be in pressure contact with each other.

3. The belt cover structure for an internal combustion engine according to claim 2 , wherein
a bolt boss portion through which a fastening bolt is inserted is formed continuously through the side mount bracket and the water pump case,
the side mount bracket has a mating surface that is aligned with both the upper inner cover member and the upper outer cover member near the bolt boss portion, and
a step shape is formed on the mating surface such that the end portion of the first seal member and the end portion of the second seal member are brought into pressure contact with each other by a fastening force of the fastening bolt.

Assignees

• Honda Motor Co Ltd

Inventors

• Asame Koichiro
• Yoda Osamu

Classifications

• F16M1/026

  for housing movable engine or machine parts other than crankshafts, e.g. valve-gear housings · CPC title

• F01P5/10

  Pumping liquid coolant; Arrangements of coolant pumps · CPC title

• F01L2250/04

  the camshaft being driven by belts · CPC title

• F01L1/024

  Belt drive · CPC title

• F01P5/12

  Pump-driving arrangements · CPC title