CA2067960A1 - Cast reinforced bracket - Google Patents

Cast reinforced bracket

Info

Publication number
CA2067960A1
CA2067960A1 CA 2067960 CA2067960A CA2067960A1 CA 2067960 A1 CA2067960 A1 CA 2067960A1 CA 2067960 CA2067960 CA 2067960 CA 2067960 A CA2067960 A CA 2067960A CA 2067960 A1 CA2067960 A1 CA 2067960A1
Authority
CA
Canada
Prior art keywords
reinforcing plate
bracket
support bracket
hole
holes
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Abandoned
Application number
CA 2067960
Other languages
French (fr)
Inventor
Dennis S. Shimmell
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nelson Metal Products Corp
Original Assignee
Nelson Metal Products Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Nelson Metal Products Corp filed Critical Nelson Metal Products Corp
Publication of CA2067960A1 publication Critical patent/CA2067960A1/en
Abandoned legal-status Critical Current

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22DCASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D19/00Casting in, on, or around objects which form part of the product
    • B22D19/02Casting in, on, or around objects which form part of the product for making reinforced articles
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02BINTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B67/00Engines characterised by the arrangement of auxiliary apparatus not being otherwise provided for, e.g. the apparatus having different functions; Driving auxiliary apparatus from engines, not otherwise provided for
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02BINTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B77/00Component parts, details or accessories, not otherwise provided for
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02FCYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
    • F02F7/00Casings, e.g. crankcases or frames
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02FCYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
    • F02F2200/00Manufacturing
    • F02F2200/06Casting
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05CINDEXING SCHEME RELATING TO MATERIALS, MATERIAL PROPERTIES OR MATERIAL CHARACTERISTICS FOR MACHINES, ENGINES OR PUMPS OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES
    • F05C2201/00Metals
    • F05C2201/02Light metals
    • F05C2201/021Aluminium

Abstract

ABSTRACT
A support bracket is disclosed made of a cast material having an embedded reinforcing plate with preformed holes of a diameter greater than that of corresponding holes drilled through the cast material. The cast material is preferably a relatively lighter and readily machinable material, such as aluminum, while the reinforcing plate is of a relatively stiffer and harder material, such as steel. The larger diameter of the reinforcing plate holes enables holes to be drilled through the support bracket with cutting into the hard material of the reinforcing plate. The reinforcing plate is advantageously configured to increase the natural frequency of vibration of the bracket.

Description

2 ~
CAST REINFORCED B~CK~T
~ACKGROUND OF THE ~NVENTION
Field of the Invention The present invention relates to cast metal brackets, and, more specifically, to cast metal brackets having an embedded stiffening plate.
Description of the Related Art Cast metal brackets are frequently used as support members in applications where the bracke~ must be formed in a special shape or configuration. A typical application is a mounting bracket for an internal combustion engine. The bracket is bolted to the engine and has support members extending outwardly for supportin~ components such as an alternator, power steering pump, or any o~ a wide variet~ of devices.
In an application such as an internal combustion engine, the bracket must be specially shaped to avoid interferences with other components in the typically crowded engine compartment of modern vehicles. Furthermore, it i9 highly desirable to make the bracket as light in wei~ht as possible to improve fuel economy. To meet these end~, such brackets will often be configured with rather slender support members and thin wall thicknesses. Cast metal, particularly aluminum, is well suited to meet such requirements.
Brackets as described above, particularly those used on engines, will be subject to significant stresses. The bracket must be able to withstand such stresses with out excessive deflection. Vibrations may be severe, and it is particularly important that the natural frequencies of the vibration modes of the bracket be higher than the vibration frequencies of the engine to which the bracket is mounted; otherwise, the vibrations of the engine would induce e~cessive bracket vibration amplitudes and might even cause the bracket to crack and fail.

2~7~t~

One approach to increasing the strength an~ natural frequency oE vibration of the bracket is to thicken the bracket.
However, this leads to an undesirable increase in weight and difficulties in fitting the bracket into cramped spaces. A
second approach is to make the bracket out of stronger and stiffer materials. However, such materials tend to be heavier and harder. Material hardness is a significant problem in that machining of the bracket is made more difficult. A third approach is to manufacture the bracket with an embedded reinforcing plate, the reinforcing plate being designed to strengthen and increase the natural ~requency of the bracket as needed.
Cast metal brackets are usually manufactured by first casting the metal, machining the ca~ting to obtain precision surfaces, and by drilling to form holes for bolts or other fasteners or penetrations. Although the metal used for the outer body of the casting, typically aluminum, may be readily machinable, the reinforcing plate material, typically steel, will be more resistant to machining. Drilled holes will be particularly di~ficult to produce, since the drill must pass through the hard reinforcing plate material as well as the softer outer body material of the bracket.
~ ccordingly, there is a heretofore unmet need for a cast bra~ket that may be made in shapes suitable for cramped spaces, that is light in weight yet strong and stiff enough to resist vibrations, and is readily machinable.
SUMMA~Y OF THE INVENTION
The present invention satisfies the aforemen~ioned need by providing a cast metal brac~et having an embedded reinforcing plate, the reinforcing plate having preformed holes which are larger in diameter tha~ the holes to be drilled through the bracket. In this manner, the drill bit does not need to cut through the harder material of the reinforcing plate.
Brackets made according to the present invention may be made in any desired configuration. Since it is not necessary to machine through the reinforcing plate, the plate may be made of extremely strong and tough materials, thus enabling the bracket to be formed in shapes having thin members which would otherwise be unable to resist the forces imposed on the bracket.
These and other objects, advantages, and features of the present invention will be more fully understood and appreciated by reference to the written specification and appended drawings.
BRIEF DESCRIPTION OF THE DRAWINGS
Fig. 1 is a front view of a cast reinforced support bracket for an internal combustion engine according to the principles of the invention;
Fig. 2 is a perspective view of the rein~orcing plate u~ed within the bracket of Fig. l;
Fig. 3 i5 a sectional view taken alony the line III-III of Fig. l;
Fig. 4 i8 a sectional view taken along the line IV-IV
of Fig. l; and Fig. 5 is a perspective view, partially sectioned, of a second cast reinforced support bracket according to the principles of the invention.
DESCRIPTION OF THE PREFERRED EMBODIM~NT
By way of disclosing a preferred embodiment, and not by way of limitation, there is shown in Fig. 1 a support bracket 10 for an internal combustion engine. In its general organization, 3Q the bracket has a central section 12 which i8 adapted to be bolted to an engine or an engine component, and outwardly 3 ~ ~

extending members 14, 16 which are adapted to support other engine components such as an alternator 18 and a power steering pump 20. The central section 12 of the bracket i8 formed with three holes 22, 24, 26 which are drilled through the bracket.
These holes are provided for the passage of bolts for attaching the bracket. Other holes 28, 30, 32 are provided for other fasteners as needed.
The outer body of the bracket is made of a cast metal such as 380 aluminum chosen for its castability and light weight.
Embedded within the aluminum body of the bracket generally surrounding a central opening 34 is a steel reinforcing plate 36.
As best shown in Fig. 2, the reinforcing plate is a relative thin member shaped as a ring having a perpendicularly off3et tongue 38. The shape of the reinforcing plate 36 is specific to the particular bracket shown in Fig. 1. It should be understood that the principles of the invention are applicable to an unlimited variety of other bracket and reinforcing plate shapes, sizes, and configurations.
The ring portion of the bracket is preformed with three holes 40, 42, and 44 which correspond in location to the holes 22, 24, and 26 of the finished bracket. As best shown in Figs. 3 and 4, each of the reinforcing plate holes has a diameter somewhat larger than the holes of the finished bracketO The reinforcing plate holes are substantially concentric with the finished holes 22, 24, 26.
Brackets according to the invention are manufactured by first forming the reinforcing plate with the desired shape and holes, then supporting the plate in the desired position within the cavity of a casting die. Molten metal is then poured into the die. As a result, the reinforcing plate is embedded within the bracket. Holes such as holes 22, 24 and 26 are then drilled {~
through the brac~et. Since the diameters of the reinforcing plate holes 40, 42, and 44 are greater than the diameters of the drilled holes 22, 24, and 26, the drill bit cuts only through the sof~er metal of the body 46 of the bracket, not through the harder, less machinable reinforcing plate metal. The resulting bracket is relatively light in weight, yet has sufficient strength and rigidity to resist the forces imposed by a harsh, vibrating environment, such as an engine compartment.
Fig. 5 shows a second example of a bracket 50 according to the invention. The configuration of bracket 50 contains a number of bends 52, 53, 54, surfaces 56, 57, 58, and a relatively narrow neck 60. The steel reinforcing plate 62 is conveniently bent, shaped, and preformed with holes such as hole 64 to be embedded within the cast aluminum body 66 in khe same manner as descri~ed above.
The above description is that of a preferred embodiment of the invention. Various alterations and changes can be made without departing from the spirit and broader aspects of the invention as set forth in the appended claims, which are to be interpreted in accordance with the principles of patent law, including the Doctrine of Equivalents.

Claims

The embodiments of the invention in which an exclusive property or privilege is claimed are defined as follows:

A support bracket comprising:
a body of cast material having at least one drilled hole therethrough;
a reinforcing plate embedded in said body having a preformed hole disposed in correspondence with said drilled hole, said preformed hole having a diameter greater than the diameter of said drilled hole.

The support bracket of claim 1 wherein said cast material is metal and said reinforcing plate is of a metal having a stiffness greater than said cast material.

The support bracket of claim 2 wherein said cast material is aluminum.

The support bracket of claim 2 wherein said reinforcing plate metal is steel.

The support bracket of claim 2 wherein said cast material is aluminum and said reinforcing plate metal is steel.

The support bracket of claim 1 wherein said reinforcing plate is configured to increase the natural frequency of vibration of the bracket.

The support bracket of claim 1 wherein said drilled hole and said preformed hole are substantially concentric.

A method for making a support bracket comprising the steps of:
forming a reinforcing plate with at least one hole having a diameter than a hole to be drilled through the bracket;
casting a bracket body material around the reinforcing plate such that said reinforcing plate is embedded within said bracket body material;
drilling a hole through said bracket body material disposed such that the drill passes through the at least one hole of said reinforcing plate without cutting into the reinforcing plate.

The method of claim 8 wherein said step of forming further includes forming said reinforcing plate of steel.

The method of claim 8 wherein said step of forming further includes configuring said reinforcing plate to increase the natural frequency of vibration of the support bracket.

The method of claim 8 wherein said step of casting further includes casting a bracket body material of aluminum.
CA 2067960 1991-12-09 1992-05-04 Cast reinforced bracket Abandoned CA2067960A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US80352591A 1991-12-09 1991-12-09
US803,525 1991-12-09

Publications (1)

Publication Number Publication Date
CA2067960A1 true CA2067960A1 (en) 1993-06-10

Family

ID=25186733

Family Applications (1)

Application Number Title Priority Date Filing Date
CA 2067960 Abandoned CA2067960A1 (en) 1991-12-09 1992-05-04 Cast reinforced bracket

Country Status (4)

Country Link
EP (1) EP0547731A1 (en)
JP (1) JPH05272355A (en)
CA (1) CA2067960A1 (en)
MX (1) MX9204626A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111594733A (en) * 2020-05-28 2020-08-28 安徽江淮汽车集团股份有限公司 Engine rotary pump mounting bracket

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19636820C2 (en) * 1996-09-11 2000-01-27 Ford Global Tech Inc Device for receiving an engine mounting of an internal combustion engine
US6058293A (en) * 1997-09-12 2000-05-02 Ericsson, Inc. Frame structure for cellular telephones
KR20040029736A (en) * 2002-10-02 2004-04-08 현대자동차주식회사 bracket for mounting subsidiaries with an engine
EP2010344A4 (en) * 2006-03-30 2009-04-15 Z F Group North American Opera Method of making a multilayered duplex material article
DE102007013494A1 (en) 2007-03-21 2008-09-25 Zf Friedrichshafen Ag cast housing
GB2595358B (en) * 2020-05-06 2023-08-23 Cummins Inc Alternator support with alignment features

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5818896B2 (en) * 1975-03-04 1983-04-15 関西ペイント株式会社 Manufacturing method of crown with plastic liner
JPS5920955B2 (en) * 1977-02-10 1984-05-16 株式会社東芝 direct contact condenser
JPS593180Y2 (en) * 1980-11-26 1984-01-28 日産自動車株式会社 cylinder block of internal combustion engine
JPH02151363A (en) * 1988-11-30 1990-06-11 Mitsubishi Motors Corp Production of bracket to be mounted on engine

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111594733A (en) * 2020-05-28 2020-08-28 安徽江淮汽车集团股份有限公司 Engine rotary pump mounting bracket

Also Published As

Publication number Publication date
EP0547731A1 (en) 1993-06-23
JPH05272355A (en) 1993-10-19
MX9204626A (en) 1993-06-01

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Legal Events

Date Code Title Description
EEER Examination request
FZDE Dead