The disclosure relates generally to clamps. In particular aspects, the disclosure relates to a sliding clamp that constrains a workpiece to a clamping plane while permitting translation of the workpiece within the clamping plane.
Clamps are often used to lock relative movement between two workpieces. In particular, clamps typically lock relative movement in all directions.
In certain applications, it may be desirable to lock relative movement in one direction while allowing relative movement in other directions. For example, in a welding fixture (e.g., for body in white (BIW) stage in vehicle manufacture), a workpiece may need to move after being clamped to assured a desired geometry with another workpiece before proceeding with welding.
According to an aspect of the disclosure, a sliding clamp includes a first arm, a first jaw attached to the first arm, a second arm, and a second jaw attached to the second arm. The first jaw includes at least one first clamping ball freely rotatable relative to the first arm. The second jaw includes at least one second clamping ball freely rotatable relative to the second arm. The second arm is configured to move relative to the first arm to adjust a jaw opening between the at least one second clamping ball of the second jaw and the at least one first clamping ball of the first jaw.
In certain embodiments, in a clamped orientation, the sliding clamp is configured to constrain translation of a workpiece in one translational direction by clamping pressure applied to the workpiece by the at least one first clamping ball and the at least one second clamping ball, and permit translation of the workpiece in two translational directions by rotation of the at least one first clamping ball and the at least one second clamping ball.
In certain embodiments, the at least one first clamping ball is configured to freely rotate about three mutually perpendicular axes.
In certain embodiments, the at least one first clamping ball includes a plurality of first clamping balls.
In certain embodiments, the first jaw includes a first set of ball bearings positioned between the first arm and the at least one first clamping ball.
In certain embodiments, the first jaw is removably attached to the first arm.
In certain embodiments, the first jaw includes a first shell attached to the first arm, the at least one first clamping ball positioned in the first shell.
In certain embodiments, the first shell includes a first base and a first endcap attached to the first base.
In certain embodiments, the first base is attached to the first arm by at least one of adhesion, threading, or rivets.
In certain embodiments, the first end cap defines a first aperture having a width of less than a diameter of the clamping ball. At least a portion of the at least one first clamping ball protrudes through the first aperture.
In certain embodiments, the first jaw includes a first set of ball bearings positioned within the first shell.
In certain embodiments, the first arm includes a first concave surface defining a first cavity, at least a portion of the at least one first clamping ball positioned in the first cavity.
In certain embodiments, the sliding clamp includes at least one of a c-clamp, f-clamp, or spring clamp.
In certain embodiments, the first arm is connected to the second arm by at least one of a hinge, a thread, or a slide.
In certain embodiments, the sliding clamp further includes a spring to bias the second jaw toward the first jaw.
In certain embodiments, the sliding clamp further includes a lock to selectively prevent relative movement of the second jaw relative to the first jaw.
According to an aspect of the disclosure, a method of making a sliding clamp includes attaching a first jaw to a first arm, the first jaw including at least one first clamping ball freely rotatable relative to the first arm. The method further includes attaching a second jaw at a second arm, the second jaw including at least one second clamping ball freely rotatable relative to the second arm. The method further includes attaching the first arm to the second arm such that the second arm is moveable relative to the first arm to adjust a jaw opening between the at least one second clamping ball of the second jaw and the at least one first clamping ball of the first jaw.
In certain embodiments, in a clamped orientation, the sliding clamp is configured to constrain translation of a workpiece in one translational direction by clamping pressure applied to the workpiece by the at least one first clamping ball and the at least one second clamping ball, and permit translation of the workpiece in two translational directions by rotation of the at least one first clamping ball and the at least one second clamping ball.
In certain embodiments, the first jaw is removably attached to the first arm.
In certain embodiments, the sliding clamp further includes forming the first jaw by positioning the at least one first clamping ball within a first shell.
In certain embodiments, the sliding clamp further includes forming the first jaw by positioning the at least one first clamping ball and a first set of ball bearings within the first shell.
Additional features and advantages will be set forth in the detailed description which follows, and in part will be readily apparent from that description to those skilled in the art or recognized by practicing the embodiments as described herein, including the detailed description which follows, the claims, as well as the appended drawings.
It is to be understood that both the foregoing general description and the following detailed description are merely exemplary, and are intended to provide an overview or framework for understanding the nature and character of the claims. The accompanying drawings are included to provide a further understanding, and are incorporated in and constitute a part of this specification. The drawings illustrate one or more embodiment(s), and together with the description serve to explain principles and operation of the various embodiments.
The accompanying drawing figures incorporated in and forming a part of this specification illustrate several aspects of the disclosure, and together with the description serve to explain the principles of the disclosure.
The embodiments set forth below represent the necessary information to enable those skilled in the art to practice the embodiments and illustrate the best mode of practicing the embodiments. Upon reading the following description in light of the accompanying drawing figures, those skilled in the art will understand the concepts of the disclosure and will recognize applications of these concepts not particularly addressed herein. It should be understood that these concepts and applications fall within the scope of the disclosure and the accompanying claims.
It will be understood that, although the terms first, second, etc. may be used herein to describe various elements, these elements should not be limited by these terms. These terms are only used to distinguish one element from another. For example, a first element could be termed a second element, and, similarly, a second element could be termed a first element, without departing from the scope of the present disclosure. As used herein, the term “and/or” includes any and all combinations of one or more of the associated listed items.
It will be understood that when an element is referred to as being “connected” or “coupled” to another element, it can be directly connected or coupled to the other element or intervening elements may be present. In contrast, when an element is referred to as being “directly connected” or “directly coupled” to another element, there are no intervening elements present.
Relative terms such as “below” or “above” or “upper” or “lower” or “horizontal” or “vertical” may be used herein to describe a relationship of one element, layer, or region to another element, layer, or region as illustrated in the Figures. It will be understood that these terms and those discussed above are intended to encompass different orientations of the device in addition to the orientation depicted in the Figures.
The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the disclosure. As used herein, the singular forms “a,” “an,” and “the” are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms “comprises,” “comprising,” “includes,” and/or “including” when used herein specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.
Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs. It will be further understood that terms used herein should be interpreted as having a meaning that is consistent with their meaning in the context of this specification and the relevant art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.
Referring to
The coupling end 110A of the first arm 102A is mechanically and movably coupled to the coupling end 110B of the second arm 102B to allow relative movement between the first jaw 104A at the clamping end 112A and the second jaw 104B at the clamping end 112B, such as by pivoting, sliding, rotating, etc. The second arm 104B is configured to move relative to the first arm 104A to adjust a jaw opening 108 (e.g., increase or decrease) between the at least one second clamping ball 106B of the second jaw 104B and the at least one first clamping ball 106A of the first jaw 104A.
In this embodiment, the first arm 102A is hingedly connected to the second arm 102B at a hinge connection 114. Although a hinge connection 114 is shown, other types of connections could be used, such as a threaded connection, a slide connection, etc. The sliding clamp 100 includes a locking mechanism 115 (see
Referring to
Similarly, the second jaw 104B includes at least one second clamping ball 106B freely rotatable relative to the second arm 102B to thereby permit translation of the workpiece. The second arm 102B includes a second concave surface 116B defining a second cavity 118B with at least a portion of the second clamping ball 106B positioned in the second cavity 118B. More particularly, the second jaw 104B includes a second shell 120B attached to the second arm 102B. The at least one second clamping ball 106B is positioned in the second shell 120B and the at least one second clamping ball 106B is configured to freely rotate within the second shell 120B about three mutually perpendicular axes (e.g., x axis, y axis, and z axis) to constrain the workpiece to the clamping plane and permit translation of the workpiece within the clamping plane.
In certain embodiments, different jaws 104A, 104B may be needed for different applications. For example, certain applications and/or workpieces may require clamping balls 106A, 106B of a differing size and/or hardness, etc. Accordingly, in certain embodiments, the first jaw 104A is removably attached to the first arm 102A and the second jaw 104B is removably attached to the second arm 102B. Exemplary removable attachments include threading, rivets, magnets, etc. In this way, the sliding clamp 100 includes a plurality of different types of jaws 104A, 104B with different types of clamping balls 106A, 106B that are interchangeable depending on the application.
Referring to
The first end cap 124A defines a first aperture 132A so that at least a portion of the first clamping ball 106A protrudes through the first aperture 132A to contact the workpiece. The first aperture 132A has a width W of less than a diameter D of the first clamping ball 106A to retain the first clamping ball 106A within the first shell 120A while allowing first the clamping ball 106A to contact the workpiece.
In certain embodiments, the second shell 120B of the second jaw 104B includes a second base 122B and a second endcap 124B attached to the second base 122B such as by bending and/or wrapping a portion of the second endcap 124B around a portion of the second base 122B. The second base 122B is attached to the second arm 102B, such as by adhesion, welding, threading, and/or rivets. The second base 122B and the second endcap 124B define a second interior 126B therebetween with the second clamping ball 106B positioned in and freely movable within the second interior 126B. In particular, in certain embodiments, the at least one second jaw 104B includes a second set of ball bearings 128B positioned within the second shell 120B and/or between the second arm 102B and the at least one second clamping ball 106B. The second set of ball bearings 128B minimizes frictional forces applied to the second clamping ball 106B, particularly in a clamped orientation. This reduces the force necessary to translate a clamped workpiece when the sliding clamp 100 is in a clamped orientation. The second set of ball bearings 128B is retained within the second shell 120B between the second clamping ball 106B and the second base 122B (and the second arm 102B) by an endcap shoulder 130B.
The second end cap 124B defines a second aperture 132B so that at least a portion of the second clamping ball 106B protrudes through the second aperture 132B to contact the workpiece. The second aperture 132B has a width W of less than a diameter D of the second clamping ball 106B to retain the second clamping ball 106B within the second shell 120B while allowing the second clamping ball 106B to contact the workpiece.
The first jaw 104A and the second jaw 104B each include single clamping balls 106A, 106B which is advantageous for minimizing the contact area of the clamping balls 106A, 106B with the workpiece, thereby allowing greater precision. However, in certain embodiments, the at least one first clamping ball 106A includes a plurality of first clamping balls and/or the first endcap 124A includes a plurality of apertures. Similarly, in certain embodiments, the at least one second clamping ball 106B includes a plurality of second clamping balls and/or the second endcap 124B includes a plurality of apertures. Doing so may distribute the pressure and/or compressive force applied to the workpiece.
As another example,
In certain embodiments, in a clamped orientation, the sliding clamp 100, 400, 500 is configured to constrain translation of a workpiece in one translational direction by clamping pressure applied to the workpiece by the at least one first clamping ball 106A, 406A, 506A and the at least one second clamping ball 106B, 406B, 506B, and permit translation of the workpiece in two translational directions by rotation of the at least one first clamping ball 106A, 406A, 506A and the at least one second clamping ball 106B, 406B, 506B. In certain embodiments, the first jaw 104A, 404A, 504A is removably attached to the first arm 102A, 402A, 502A and/or the second jaw 104B, 404B, 504B is removably attached to the second arm 102B, 402B, 502B.
In certain embodiments, the method further includes forming the first jaw 104A, 404A, 504A by positioning the at least one first clamping ball 106A, 406A, 506A within a first shell 120A. In certain embodiments, the method further includes forming the first jaw 104A, 404A, 504A by positioning the at least one first clamping ball 106A, 406A, 506A and a first set of ball bearings 128A within a first shell 120A. Similarly, in certain embodiments, the method further includes forming the second jaw 104B, 404B, 504B by positioning the at least one second clamping ball 106B, 406B, 506B within a second shell 120B. In certain embodiments, the method further includes forming the second jaw 104B, 404B, 504B by positioning the at least one second clamping ball 106B, 406B, 506B and a second set of ball bearings 128B within a second shell 120B.
Those skilled in the art will recognize improvements and modifications to the preferred embodiments of the present disclosure. All such improvements and modifications are considered within the scope of the concepts disclosed herein and the claims that follow.
Filing Document | Filing Date | Country | Kind |
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PCT/US2019/058471 | 10/29/2019 | WO |