MXPA98005130A - Braid system for multiple, pre-assembled and method for mi - Google Patents

Abstract

The present invention relates to a preassembled workpiece clamped to a mounting surface of a second workpiece, and usable for retaining a fastener, wherein the pre-assembled workpiece comprises: an opening extending through the preassembled part between an outer surface of the preassembled workpiece and a mounting surface of the preassembled workpiece, a unitary sleeve member disposed in the opening through the preassembled workpiece, wherein the unitary sleeve member has a second flange radial at a second end of the unitary sleeve member, a diameter of the opening through the pre-assembled workpiece greater than the outer diameter of the unitary sleeve member, an opening rib member extending over the opening through of the preassembled workpiece, a second inner surface of the second radial flange engageable with the rib member of opening for releasably attaching the unitary sleeve member to the preassembled workpiece, the unitary sleeve member is laterally positioned in the opening of the preassembled workpiece

Description

BRAKE SYSTEM FOR MULTIPLE, PRE-ASSEMBLED AND METHOD FOR THE SAME BACKGROUND OF THE INVENTION Generally speaking, the invention relates to the systems and methods for a work piece, previously assembled, which is subjected to a second work piece, where the pre-assembled work piece compensates for the characteristics of tolerances of manufacturing, misalignments and differences in thermal expansion between workpieces, and more particularly relates to the systems and methods for preassembled plastic components that are mounted in a fixed manner to a motor, metal, automotive by means of a fastener, which It is part of a previously assembled cover. The clamping members are widely used to clamp a first workpiece in a mounted relation to a second workpiece, and in assembly lines and other operations, it is known that they previously assemble one or more clamping members with one of the clamping members. work pieces to facilitate the subsequent assembly of these with other components. The assembly of arm covers or oscillating levers, or multiple, in internal combustion engines in the automotive industry is representative of one of these applications among many others where the pre-assembled work pieces are used with a significant economic advantage. U.S. Patent No. 4,732,519 entitled "Fastener Assembly With Axial Movement" issued on March 22, 1988 to Wagner and commonly assigned with the present invention, for example, has a cover for the pre-assembled valve having one or more fasteners and washer assemblies that are arranged so that they are retained in the corresponding openings in the valve cover and then attached to the valve cover to a portion of the head of an automotive engine. U.S. Patent No. 4,732,519 also teaches the retention of the fasteners with sufficient axial movement relative to the pre-assembled valve cover so that the fasteners do not project beyond the mounted surface of the underside of the valve. it is facilitated by assembling the previously assembled valve cover and aligning the fasteners with the corresponding holes in the portion of the motor head before tightening the fasteners. Advances in polymer technologies now allow the production and use of relatively light and moldable plastics at a lower cost in applications that once had to be made of metal. It is also true that the components that are used in variable temperature environments include the valve covers mounted on the motor car heads as discussed above. Generally, plastics and most materials, however, are subject to molding and production tolerances which may result, for example, in lateral misalignment of fasteners retained in a preassembled workpiece relative to the corresponding holes. in a second work piece in which the previously assembled work piece is assembled. Plastics and other materials are also susceptible to stress and force concentrations and, particularly, to concentrations of these near the clamping members through the workpiece. And in applications where the workpieces are mountably fastened on similar materials, they are subjected to extreme variations in temperature, differences in stresses and thermally induced forces that can adversely affect one or both work pieces in the applications in where the plastic mounts subjectively to the mental. Even more is known the existence of pieces of work assembled previously with members of subjection no compensated for the tolerances of production and molded of the piece of work assembled previously, or for misalignments between the first and second work pieces, or for the susceptibility of plastics and other materials to concentrations of stress and force caused by the fasteners, or by the thermal expansion averages of the different work pieces. Thus, the present invention is directed to advances in the technique of work pieces assembled, subjectly, to a second work piece by one or more clamping members and methods that solve the problems of the prior art. It is another object of the invention to provide a previously assembled workpiece and the method thereof that compensates for misalignments between the preassembled workpiece, mountable on a second workpiece, which offsets manufacturing tolerances of the workpiece. pre-assembled, which compensates the susceptibilities of the previously assembled workpiece, especially the plastic workpieces, for the concentrations of tension and force caused by the clamping members and which compensates the characteristics of the thermal differences of different work pieces . It is a more particular object of the invention to provide a novel, pre-assembled workpiece having a sleeve member that is retained in the aperture therein, and a retaining clip disposed therethrough of the sleeve member. cuff, whereby the fastener is positioned axially and laterally in relation to the opening through the workpiece to allow assembly and alignment of the previously assembled workpiece into a second workpiece without interference from the fastener that It is retained by a piece of work previously assembled. Yet another particular object of the invention is to provide a previously assembled plastic cover mimebra having a sleeve member that is arranged to be retained in an opening through, and a fastener that is arranged so that it is retained through of the sleeve member, whereby the fastener is positioned axially and laterally in relation to the opening through the plastic cover member to allow assembly and alignment of the cover member in a metal component for the motor of an automobile , without the interference of the fastener in the membrane of the plastic cover previously assembled. It is another object of the invention to provide a preassembled workpiece and the method therefor which has a retaining sleeve disposed in an aperture therethrough, and a retaining fastener disposed in the sleeve member, whereby the The fastener is positioned laterally in relation to the workpiece previously assembled by a sleeve member which is positioned laterally in an enlarged opening through the workpiece, or by placing a fastener in relation to the enlarged opening of the sleeve member. . It is still another object of the invention to provide a novel pre-assembled workpiece and the method therefor having a sleeve member disposed in the opening through, and a retaining clip disposed through the sleeve member, so that the sleeve member is positioned axially in relation to the opening through the previously assembled workpiece by a first substantially radial flange of the sleeve member formed as a resilient spring member in the workpiece holder previously assembled from the workpiece. the second piece of work. Still another object of the present invention is to provide a novel pre-assembled work piece, and the method for making the same, having a retaining sleeve member, disposed in an aperture therein and a retaining clip disposed thereon. through the sleeve member, the sleeve member it engages so that it is retained in the opening through the previously assembled workpiece by a first internal surface of a first substantially radial flange of the sleeve member engaging with an outer surface of the previously assembled workpiece and by a second internal surface of a second flange of the sleeve member engaging with a rib member or opening projection protruding into the opening through a previously assembled workpiece. It is still another object of the invention to provide a previously novel assembled workpiece, and the method for making it, having a retaining sleeve member disposed in an opening through the latter, and a retaining clip, disposed through the sleeve member, the retainable clip engages through of the sleeve member by the head of the clip engaging the first end of the sleeve member and by the rod flange member protruding from the clip engaging the sleeve flange projecting from the inner surface of the sleeve member. sleeve. These and other objects, aspects and advantages of the present invention will become more apparent, in full, after careful consideration of the following detailed description of the invention and the accompanying drawings, which are enlarged to facilitate their understanding, wherein the structure and similar steps are referred to with the corresponding numerical references and indicators.

BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a sectional, partial view of a previously assembled assembled work piece, so that it is retained, in a second work piece by means of a fastener of a previously assembled work piece according to the shape of exemplary embodiment of the invention. Figure 2 is another partial sectional view of the previously assembled workpiece of Figure 1 illustrating an axial position of a fastener relative thereto. Figure 3 is a partial, sectional view of a previously assembled workpiece illustrating a lateral positioning of the sleeve member relative to the previously assembled workpiece. Figure 4a is a partial sectional view of a previously assembled workpiece that illustrates in more detail an opening through the previously assembled workpiece. Figure 4b is a partial plan view along lines I-I of Figure 4a. Figure 5a is a partial plan view along the lines Il-ll of Figure 2, according to an exemplary embodiment of the present invention.

Figure 5b is a partial plan view along the lines II-II of Figure 2, according to an alternative embodiment of the invention. Figures 6a and 6b are partial sectional views of a previously assembled workpiece illustrating another aspect of the invention.

DETAILED DESCRIPTION OF THE INVENTION Figure 1 is a partial, sectional view of a pre-assembled workpiece 100 including a first workpiece 101 that is mounted on a mounting surface 12 of a second workpiece 10, and subject to the same by means of a fastener 110 which is engaged so as to retain the first workpiece 101 and which is placed in a hole 14 of a second workpiece 10. In the exemplary application, the first workpiece 101 is a multiple inlet, molded in plastic and the second workpiece 10 is a component of an automobile engine, but more generally the first workpiece 101 and the second workpiece 10 can be any member that is assembled together, subject, by a fastener member wherein the work pieces are of different or similar materials. Figures 1 and 2 show a member of the sleeve 120 which is retained disposed in an opening 102 which extends through the first workpiece 101 between the outer surface 104 and the mounting surface 106 therein. The fastener member 110 has a portion of a threaded rod 112 and a head 114, and is disposed retentively through the sleeve member 120. The fastener 110 is positioned axially through the sleeve member 120 relative to the opening 102. through the first workpiece 101 with sufficient axial movement so that the fastener 110 does not always project beyond the mounting surface 106 thereof, thereby facilitating assembly of the previously assembled workpiece. 100 and the alignment of the fastener 110 with the corresponding hole 14 in the second workpiece 10 before the fastener 110 is tightened without interference from it. The fastener 110 is also positioned laterally relative to the opening 102 through the first workpiece 101 to compensate for misalignment of the threaded portion 112 of the fastener 110 and the core 14, where misalignment may result from molding tolerances or production and other factors. This type of misalignment is particularly significant in applications, including applications for the cover of an oscillating lever, wherein the previously assembled workpiece includes a plurality of fasteners, which must be aligned with the corresponding plurality of perforations in the second piece. of work. Figures 3, 4 and 6 of the exemplary embodiment show the opening 102 of the first workpiece 101, which includes a tab member, with an opening, projecting 108 on an inner surface thereof. The sleeve member 120 also has a substantially radial flange 124 at the first end thereof and a second radial flange at a second end 126 thereof. In the first internal surface 125 of the first substantially radial flange 124, it engages with the external surface 104 of a first workpiece 101 and a second internal surface 127 of the second radial flange 126 that engages with the member or members of the tab of the opening 108 to be fixedly engaged with the sleeve member 120 on the first workpiece 101. Figure 4a shows the opening 102 through the first workpiece 101 having a plurality of at least two openings that project from the members of the flange 108 disposed annularly on the inner surface thereof, wherein each member of the flange, of the opening 108 has an axially aligned inclined surface 107, which is partially shown in Figure 4b, and a second, substantially radial flange engaging surface 109 which engages the inner surface 127 of the second radial flange 126 of the sleeve member 120 as shown in FIG. better in Figure 6a. In a configuration shown in Figure 4a, the axially inclined surface 107 extends substantially the full length of the opening 102 to improve mechanical integrity. According to an aspect related to the present invention, the sleeve member 120 is disposed in an opening 102 by inserting and advancing the second flange 126 of the sleeve member 120 into the opening 102 from the outer surface 104 and along the the inclined surface or surfaces 107 until the inner surface 127 of the second flange 126 is engaged by the surface or surface 109 of the member or flange members of the opening 108. In accordance with this aspect of the invention, both one and both members of the aperture tab 108 and the second flange 126 of the sleeve member 120 are sufficiently resilient to allow passage along the second flange 126 and above the inclined surface 107 of the flange members aperture flange 108 until the sleeve member 120 engages in a retained manner through the opening 102 of the first workpiece 101. Figures 1-4 and 6 show the sleeve member 120 having a flanged sleeve member 122 projecting from the inner surface thereof, and more generally a plurality of flanged sleeve members 122 disposed annularly around the internal surface of the sleeve. Figure 6b shows each flange sleeve member 122 having an inclined surface 121 and a radial surface 123. The fastener 110 includes a flange member, protruding from 116 between the threaded end portion 112 and the head 114, where the tab member of the rod 116 is more generally a plurality or a tab member disposed as shown. Figure 2 shows a rod member with flange 116 having an inclined surface 117 and a radial surface 118. The radial surface 118 of the member of the rod with flange 116 engages with the radial surface 123 of the flange sleeve member 122 and the head 114 of the fastener 110 having an elongated flange portion 115 that engages with the first end of the sleeve member 120 to securely attach the fastener 110 to the first workpiece. According to this aspect of the invention, the fastener 110 is positioned axially in relation to the first workpiece so that the fastener 110 does not protrude beyond the assembled surface 106 of the first workpiece 101 during assembly or alignment . Subsequently, the fastener 110 extends axially towards the perforation 14 of the second piece 10. The inclined surface 121 of the flanged sleeve member 122 and the inclined surface 117 of the flanged rod member 116 cooperate and are sufficiently resilient to allow the passage of the fastener 110 through the member of the sleeve 120 until the holder is fixedly disposed therein. Figure 5a shows the opening 102 through the first piece 101 having an elongated diameter relative to the outside diameter of the second flange 126 of the sleeve member 120, wherein the sleeve member 120 is positioned laterally in the opening 102 relative to the first workpiece 101. Figure 5b shows an opening 102 through the first workpiece 101 enlarged only in one dimension to allow placement side of the sleeve member 120 in one dimension. According to these embodiments, the fastener 110 moves axially but not laterally in relation to the sleeve member 120, and the sleeve member 120 and the fastener 110, fixedly coupled, move laterally towards the first part of the sleeve. work 101. All the members of the sleeve 120 remain fixedly coupled to the workpiece 101 in the manner as discussed above by the appropriate dimension of the second flange 126 and the opening of the members of the flange 108.

In a related alternative embodiment, the sleeve member 120 has an opening with an elongated diameter relative to the outer diameter of the fastener 110, whereby the fastener is placed laterally on the sleeve member 120 and thus in relation to the workpiece 101. According to this alternative embodiment, the fastener 110 moves axially and laterally in relation to the sleeve member 120, wherein the fastener 110 remains fixedly coupled to the sleeve member 120 by the appropriate dimension of the rod members with flange 116 and the sleeve member with flange 122. However, the sleeve member 120 is fixed substantially lateral to the opening 102 of the first workpiece 101. According to another alternative embodiment, the cuff member 120 is positioned laterally relative to the opening 102 of the first workpiece 101 and the fastener 110 is placed sideways FIG. 1, 2 and 6 show the first, substantially radial flange member 124 of the sleeve member 120 formed as a resilient spring member, wherein the sleeve member 120 is axially positioned. in relation to the opening 102 through the first workpiece 101 after fastening the first workpiece 101 to the second workpiece 10 with a fastener 110 and bending the spring member. Figure 6a shows a sleeve member 120 in a previously assembled configuration, without the fastener 110 for clarity, wherein the resilient, substantially radial first flange member 124 bends the sleeve member 122 partially withdrawing from the opening 102 of the sleeve. first workpiece 101 so that the second radial member 126 is removed in relation to the mounting surface 106 of the first workpiece 101. Figure 6b shows a first, substantially radial flange member 124 flexed by the action of grip of the fastener 110 not shown, to advance the sleeve member 120 towards the opening 102 of the first workpiece 101 until the second member of the radial flange 126 sits on the mounting surface 12 of the second workpiece part. work 10. In accordance with this aspect of the invention, the first, substantially radial, resilient, flexed flange member 124 maintains a predominant torque in the fastener 110. The first, substantially radial, resilient flange member 124 is also flexible to allow expansion and contraction of the first workpiece 101 while maintaining the prevailing torque in the fastener 110 under varying temperature conditions. The first substantially radial flange member 124 also distributes the retaining load of the fastener 110 in an increased surface area of the first workpiece 101, and the second radial flange member 126 distributes the retaining load of the fastener 110 in an area of increased surface of the second workpiece 10, thereby reducing any concentration of the holding forces in the workpieces. While the foregoing description of the invention allows those skilled in the art to make and use what is considered to be the best form of the invention in the present, experts will appreciate and understand that there are variations, combinations, modifications and equivalents within the spirit and scope of the exemplary embodiments shown in the invention. Therefore, the present invention is not limited to the exemplary embodiments shown therein but includes all embodiments within the scope of the appended claims.

Claims (14)

1. A pre-assembled workpiece that is fastened to a mounting surface of a second workpiece, the pre-assembled workpiece comprises: an opening extending through the workpiece previously assembled between the external surface of the workpiece of work previously assembled and the assembly surface of the previously assembled workpiece; the sleeve member arranged so as to be fixed or retained in the opening through the previously assembled workpiece; the fastener that is arranged so as to be fixed or retained through the sleeve member, the fastener has a portion of a rod and a head, the fastener which is axially positioned through the sleeve member relative to the workpiece pre-assembled and the fastener that is placed laterally on the previously assembled workpiece, so that the previously assembled workpiece is assembled and aligned on the mounting surface of the second workpiece without interference from the fastener that engages Fixed to the previously assembled workpiece.

2. The pre-assembled workpiece according to claim 1, wherein the pre-assembled workpiece opening has a flange member, with opening, protruding, and a sleeve member having a first substantially radial flange in the first end and a second radial flange at the second end, a first internal surface of the substantially radial flange which engages with the external surface of the pre-assembled pi and the second internal surface of the second radial flange which engages with the outer member the flange of the opening that permanently engages or retains the sleeve member with the workpiece.

3. The preassembled workpiece according to claim 1, wherein the sleeve member has a flanged sleeve member protruding from the inner surface of the sleeve member and the fastener having a protruding rod member with protruding flange, the head of the fastener engages with the first end of the sleeve member and protrudes from the rod member with flange of the fastener that engages with the flange sleeve member to stably or retain the fastener in the preassembled workpiece .

4. The pre-assembled workpiece according to claim 1, wherein the previously assembled workpiece is a plastic component that is fastened to a metal component of an automobile engine.

5. The preassembled workpiece according to claim 1, wherein the opening through the previously assembled workpiece has a plurality of at least two flange members projecting the opening, each flange member projecting the opening having an inclined surface, axially aligned and a second flange engaging surface, substantially radial.

6. The pre-assembled workpiece according to claim 1, wherein the opening through the previously assembled workpiece has an elongated diameter relative to the diameter of the sleeve member, whereby the sleeve member is laterally positioned in relation to the diameter of the sleeve member. with the piece of work previously assembled.

7. The preassembled workpiece according to claim 6, wherein the opening through the preassembled workpiece is elongated or widened in one dimension to allow lateral positioning of the sleeve member in one dimension.

8. The preassembled workpiece according to claim 1, wherein the substantially radial flange member is a resilient spring member, wherein the sleeve member is positioned axially relative to the opening through the assembled workpiece. previously after fastening the piece of work previously assembled to the second work piece.

9. The method for fixedly placing a workpiece previously assembled on a mounting surface of a second workpiece, the method comprising: fixedly or retaining a member of the sleeve in an opening through an assembled workpiece previously; disposing fixed or retained a fastener having a rod and a head through the sleeve member; axially placing the fastener through the sleeve member relative to the previously assembled workpiece; laterally placing the fastener in relation to the previously assembled workpiece, whereby the previously assembled workpiece is assembled and aligned on the mounting surface of the second workpiece without interference from the fastener fixedly attached or retained to the piece of work assembled previously.

10. The method according to claim 9, wherein the lateral positioning of the fastener relative to the previously assembled workpiece is carried out by laterally positioning the sleeve member in relation to the previously assembled workpiece, the sleeve member being it is retained in an enlarged opening through the previously assembled workpiece.

11. The method according to claim 9, wherein the lateral positioning of the fastener in relation to the previously assembled workpiece is carried out by the lateral positioning of the fastener in relation to the sleeve member, the fastener being disposed fixed in an enlarged opening of the sleeve member.

12. The method according to claim 9, that the retained coupling of the sleeve member in the opening through the previously assembled workpiece is carried out by engaging the first internal surface of the first substantially radial flange of the sleeve member with an outer surface of the previously assembled workpiece and by engaging a second internal surface of a second radial flange of the sleeve member with a flange member, with an opening protruding into the opening through the sleeve part. previously assembled work.

13. The method according to claim 9, wherein the fastener engaged of the fastener through the sleeve member is carried out by engaging the head of the fastener with the first end of the sleeve member and by engaging a rod member with flange protruding from the fastener with a flange sleeve member protruding from the inner surface of the sleeve member.

14. The method according to claim 9, further comprising the axial positioning of the sleeve member relative to the opening through the workpiece previously assembled by the first substantially radial flange of the sleeve member formed as a resilient spring member. and flexible that is placed on the outer surface of the previously assembled workpiece after the workpiece previously assembled to the second workpiece is clamped.