Patent Application
20050008428
The present invention relates generally to an assembly of components and affixing means such as an attachment for attaching a first component to a second component. The present invention also relates to a method of attaching a first component to a second component employing the affixing means of the present invention. More particularly, the present invention relates to attachment components for attaching at least one heater exchanger to an attachment component of elements such as a shroud or another heat exchanger for forming a heat exchanger assembly, and a method for attaching using such attachments.
For many years, industry has been concerned with designing improved attachments for various articles and applications. Particularly in vehicle cooling systems, heat exchangers may be affixed together as a module or as a multiple heat exchanger assembly. The industry has designed attachments suitable for attaching a heat exchanger to a component such as a shroud, a wall, another heat exchanger, a front end structure of an automotive vehicle or the like to form a heat exchanger assembly, which may be employed in articles of manufacture such as automotive vehicles. Many such assemblies have, as affixing means, fasteners such as screws, metal clips or nuts mounted to adjacent heat exchangers. Such fasteners have often been composed of carbon steel subject to ‘red rust’ or corrosion, or have had to be plated or made of stainless steel to prevent or retard costly corrosion. In the case of some heat exchanger to exchanger assemblies, in order to decrease the number of affixing means, some assemblies have included lower mounting “J” shaped brackets or the like on, for example, the second heat exchanger, that have reduced, in some interests, the amount of fasteners affixing means up to about 50%.
Other methods of affixing heat exchangers, for example, either integral to plastic end tanks or using plastic flexible members may be found in the prior art. In particular, affixing means wherein a flexible hook member ‘traps’ the bracket of an adjacent exchanger by being hooked over the edge of the bracket, with heat exchanger faces approximately normal to the vehicle air stream and approximately vertical to the ground have been described. U.S. Pat. Nos. 5,657,817, 6,158,500 and 5,996,684 describe flexible hook members of this style.
One of the problems with heater exchange assemblies of the sort described above is that such assemblies are often, of necessity, mounted to the vehicle frame through isolates to cushion the effects of harsh differential inertia movements relative to the vehicle frame. The assemblies are subject to high frequency/low inertia vibration movements, as well as harsh low frequency/high inertia ones. Hook type members, particularly those attaching to the edge of a mating bracket or the like are, therefore, at risk of being dislodge and could potentially cause disassembly of the attached assemblies during normal driving of the vehicle.
It is an object of the present invention to provide assemblies, and, in particular, heat exchanger assemblies, that avoid use of screw and clip or nut fasteners, to the maximum amount possible, to affix components. It is a further object of the present invention to avoid affixing means that might be dislodged more easily during normal driving, and that do not require additional parts to restrict movement. It is a further object of the invention to provide a method for attaching a first component such as a heat exchanger to a second component such as a heat exchanger employing the affixing means of the present invention.
The present invention provides for a robust mounting that allows the assembly of multiple components, and, in particular, heat exchangers, without, necessarily, the use of fasteners. The present invention further provides for reduced cost assemblies due to decreased parts and increased life-span of affixing over technologies currently present in the industry. The present invention further provides for heat exchangers affixed to other exchangers whereby the bracket of the adjoined heat exchanger is completely ‘submerged’ or ‘captured’ by the first heat exchanger in vehicle front to back movements so as not to be subject to dislodgement or other detachment during vibration and differential harshness conditions of normal vehicle driving. The present invention further provides for assemblies made of materials that are ‘non-corrosive’ or ‘non-metallic’ thereby avoiding prior art problems such as ‘red rust’ or ‘corrosion’ at attachment or affixing points of the components. In addition, the present invention solves present problems by providing tight packaging and an easily assembled module that can withstand all normal inertial loading placed upon it under normal driving conditions.
According to one aspect of the invention, there is disclosed an attachment for attaching a first component of an article to a second component of the article. As an example, the attachment may be employed for attaching a first heat exchanger to a component such as a shroud, a wall, another heat exchanger, a front end structure or module of an automotive vehicle or the like for assisting in forming a heat exchanger assembly. The attachment may preferably be in two parts, a first attachment component and a second attachment component. According to one embodiment, the attachment includes flange members. In preferred embodiments of the present invention, a heat exchanger assembly, comprises a first attachment component including slot tab, a flexible member, such as ‘flex’ or ‘bayonet’ member or the like. Also preferred are embodiments which have flexible members with or without a ledge and with or without an alignment element such as a ‘post’ or ‘locator post’ combination; a second attachment component, including a mating bracket with flange combination; wherein the first attachment component is approximately parallel to the second attachment component and wherein the bracket is aligned with the opening formed by the slot walls, post or locator post of the first heat exchanger component and assembled using a sliding motion. More preferred are embodiments where the first attachment component flexible member includes a ledge, more preferred, a snapping ledge.
Also preferred are embodiments wherein the flange of the second attachment component is captured under the slot tab of the first attachment component. Also preferred are embodiments wherein the first attachment component further includes a ‘back up’ or ‘accessory’ hole for a screw as a secondary support. Even more preferred embodiments provide for a heat exchanger assembly wherein one or more of the attachment components engage another component by snapping in. Also more preferred is a heat exchanger assembly wherein two or more of the attachment components engage other components by snapping in. In even more preferred embodiments the heat exchanger assembly comprises a first attachment component including a slot wall, slot tab, locator post, stop wall, stop edge, flex finger or bayonet and a ledge combination; and a second attachment component, including a mating bracket with flange combination; wherein the first attachment component is approximately parallel to the second attachment component and wherein the bracket is aligned with the opening or open area formed by the slot walls of the first heat exchanger component, and eventually a locator post. In even more preferred embodiments, the heat exchanger assembly components are assembled using a sliding motion.
The features and inventive aspects of the present invention will become more apparent upon reading the following detailed description, claims and drawings, of which the following is a brief description:
a is another perspective view of a bracket which provides affixing means via snap attachment in accordance with an exemplary aspect of the present invention;
b is another perspective view of an affixing means with slot tabs, bayonet or flexible finger with a ledge, locator post, backup screw hole, stop wall, stop edge and slot wall in accordance with an exemplary aspect of the present invention;
b-1 is another perspective view of an affixing means with slot continuous flange, bayonet or flexible finger with a ledge, locator post, backup screw hole, stop wall, stop edge and slot wall in accordance with an exemplary aspect of the present invention;
c is another perspective view of an affixing means with slot tabs, bayonet or flexible finger with a ledge, slot wall, stop edge and stop wall in accordance with an exemplary aspect of the present invention;
a is another perspective view of a bracket which provides affixing means without snap attachment in accordance with an exemplary aspect of the present invention;
b is another perspective view of an affixing means with slot tabs, bayonet or flexible finger without a ledge, locator post, stop wall and slot wall in accordance with an exemplary aspect of the present invention;
c is another perspective view of an affixing means with slot tabs, bayonet or flexible finger without a ledge, stop wall and slot wall in accordance with an exemplary aspect of the present invention;
a is another perspective view of a heat exchanger assembly affixing means between two heat exchangers with snap attachment and using locator post in accordance with an exemplary aspect of the present invention;
b is another perspective view of a heat exchanger assembly affixing means between two heat exchangers with snap attachment and without the use of locator post in accordance with an exemplary aspect of the present invention;
c is another perspective view of a heat exchanger assembly affixing means between two heat exchangers without snap attachment in accordance with an exemplary aspect of the present invention.
The present invention is predicated upon providing an improved affixing means and method for attachment. It is contemplated that an affixing means such as an attachment, snap or a ‘slide and snap’ attachment may be employed in a variety of articles of manufacture including, without limitation, electronic articles, buildings, furniture, recreational articles, manufacturing articles or the like. In preferred embodiments, the affixing means may be used with multiple assemblies, particularly where stacked assemblies are used in areas of dynamic vibration, e.g. fan shroud assemblies attached to an adjacent heat exchanger. In other preferred embodiments, the affixing means may be used to mount oil coolers face to face with an adjacent heat exchanger or heat exchanger core. In still other preferred embodiments, sensing devices may also be assembled using the affixing means to heat exchangers on the tank, core or both areas. The affixing means may also be used with multiple screen assemblies in a filter system or multiple shelving systems that might require a more robust mounting. Other preferred embodiments include vehicle sub-frames mounting several components in sub-assembly prior to mounting on a vehicle, in particular, affixing means for attaching elements such as front end structures components of a vehicle. In more preferred embodiments, affixing means comprise plastic or plastic-like materials that can be part of molded features to trap, for example, a flange member to affix the component to the front end structure.
The affixing means, and, in particular, an attachment such as the snap or slide and snap attachment, however, is particularly suitable for use in heat exchanger assemblies and even more particularly, the attachment is suitable for use in heat exchanger assemblies of vehicles and, particularly, automotive vehicles. Thus for convenience, the illustrated attachments are applied to heat exchanger assemblies, however, the skilled artisan will appreciate that the assemblies may be adapted for use in other articles as well.
As used herein the term “heat exchanger” is intended to include any system configured for exchanging heat to or from one or more fluids that are preferably flowing within or about the system. Thus, a heat exchanger may be an oil cooler, a water cooler, an air heater, a condenser, a fan shroud, a radiator, a front end structure to carry engine cooling components or the like.
In preferred embodiments, the heat exchanger assembly has a first exchanger attachment component which includes slot wall, slot-tab or slot continuous flange, flex finger with a ledge combination, alignment element such as a locator post, stop wall and a stop edge. Slot tabs may be discrete and described as ‘slot tab’ or ‘tabs’ or continuous such as a slot continuous tab or flange. The second heat exchanger attachment component preferably includes a flange on a mating bracket which, when assembled with the first heat exchanger attachment component will be ‘trapped’ or ‘restricted’ in movement under the tab or continuous flange of the first heat exchanger attachment component and the flex finger ledge of the first exchanger attachment component engages to the upper part of the window in the mating bracket A flex finger ledge prevents vibration movement in one of the ‘cross car’ or left to right direction, a stop edge prevents the remaining cross car movement, a stop-wall restricts vibration in one of the vehicle front to back movement, the slot tab restricts vibration in one of the vehicle front to back movement, the locator post restricts top to bottom or vertical vibration and flex finger creates preload on the second component which is bracketed to prevent any looseness in the system. When the ledge snaps to the opening of the bracket it is a snapped attachment and when there is no ledge in the attachment then it is non-snapped attachment.
Also in preferred embodiments, the flexible member, such as the flex finder, with or without a ledge, is aligned to provide preload to the bracket of the second component against the slot tab or continuous tab or flange.
In preferred embodiments, various elements are available to restrict or prevent motion in a direction. In more preferred embodiments, the stop edge prevents over-travel or excessive sliding. Also in more preferred embodiments, the stop wall prevents over flexing of the flex member or bayonet. In more preferred embodiments, and leading edges allow smooth engagement of the flexible member with slot tabs. In particularly preferred embodiments, a snapped attachment combination in accordance with the present invention restricts movement in at least 2 directions. In other particularly preferred embodiments, a snapped attachment combination in accordance with the present invention restricts movement in at least 4 directions.
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Of course, it is contemplated that attachments according to the present invention may allow motion as well as motion. Moreover, various larger or smaller tolerances may be formed between openings, flanges, flanged portions, flange members, protrusions or any other components to restrict or allow motion as desired. In preferred embodiments, attachments according to the present invention restrict motion to a minimum level.
Unless stated otherwise, dimensions and geometries of the various structures depicted herein are not intended to be restrictive of the invention, and other dimensions or geometries are possible. Plural structural components can be provided by a single integrated structure. Alternatively, a single integrated structure might be divided into separate plural components. In addition, while a feature of the present invention may have been described in the context of only one of the illustrated embodiments, such feature may be combined with one or more other features of other embodiments, for any given application. It will also be appreciated from the above that the fabrication of the unique structures herein and the operation thereof also constitute methods in accordance with the present invention.
The preferred embodiment of the present invention has been disclosed. A person of ordinary skill in the art would realize however, that certain modifications would come within the teachings of this invention. Therefore, the following claims should be studied to determine the true scope and content of the invention.
| Number | Date | Country | |
|---|---|---|---|
| 60485895 | Jul 2003 | US |
