Hub clamping device dental

Effective date : A clamping device for a shaft-hub connection in a torque-transferring device in a drive train of a vehicle. The connection is an axial spline connection between an externally toothed shaft and an internally toothed hub. An externally toothed ring is provided for clamping the shaft and hub, wherein the externally toothed ring includes an annular body having external teeth.

Fastening tongues of leaf-spring-type design are provided on and extend from the radially inner side of the annular body. Outer ends of the leaf-spring-type fastening tongues are attached to the shaft, and the teeth of the toothed ring mesh with teeth of the hub. By rotating the toothed ring against a force provided by the fastening tongues, a clamping force is produced on the shaft-hub connection in the assembled state and is introduced into the shaft-hub connection through the teeth and fastening tongues.

The present invention relates to a clamping device for a shaft-hub connection in a torque-transferring device in a drivetrain of a vehicle. That clamping system has a shaft element having external teeth, in the form of a ring gear of a clutch, and a hub element having internal teeth, in the form of a flange of a damper.

hub clamping device dental

In order to achieve flawless transfer of torque between the shaft element ring gear and the hub element damper flange with maximally reduced impact or rattling noises due to torsional vibrations, the shaft element has a plurality of cutouts, in each of which is situated a spring element, which has spring arms that engage the internal teeth of the hub element and thereby realize a clamping of the shaft element with the hub element.

A disadvantage of this clamping system, however, is the high expense of construction, since cutouts must first be made in the shaft element, which incurs additional costs due to the necessary processing of the shaft element. An object of the present invention is therefore to provide a clamping device for a shaft-hub connection of the type referred to above, which is distinguished by reduced production costs.

The present clamping device is usable in particular for torque-transferring devices, consisting of a torsional vibration damper such as a dual mass flywheel and a clutch in particular a dual clutch. An output-side flange of the torsional vibration damper as an example of a hub element and a driver ring of the dual clutch as an example of a shaft element form an axial spline connection.

The present clamping device offers transfer of torque between the dual mass flywheel and the dual clutch with the possibility of axial tolerance compensation.

The invention will be explained in greater detail below, referring to the accompanying drawings, on the basis of preferred exemplary embodiments.

hub clamping device dental

They show the following:. Through that axial plug connection 1 a two subunits 2 and 3 are connectible to each other, of which subunit 2 forms a damper that is connectible to the output shaft of an internal combustion engine, and subunit 3 in the depicted exemplary embodiment contains a dual clutch which is pre-installable on the transmission side.

As can be seen in FIG. In the depicted exemplary embodiment, the tooth profiles 5 are carried by a flange-like output part 10 of damper 2and the tooth profiles 6 by a driver ring 7which is a component of the subunit 3 pre-installed on the transmission side. The tooth profiles 5 form internal teeth, whereas the tooth profiles 6 form correspondingly matched external teeth. In order to ensure circumferential clamping of the tooth profiles 5 and 6a clamping element 8 is provided, which is acted upon in the circumferential direction by at least one energy storage device 9which is designed here as a helical compression spring.

hub clamping device dental

The energy storage device 9 can also take a different form, however; for example, the clamping element 8which here is ring-shaped, could have cantilever-beam-like arms that are elastically pre-stressed and produce a circumferential force at least on the clamping element 8. Such arms can be supported on component 10 with appropriate pre-biasing. The energy storage device 9 is installed between the components 10 and 8 with pre-biasing in the circumferential direction.

The clamping element 8 forms or carries at least individual profiles or regions 11 which are suitable for interacting with profiles or teeth of tooth profile 6 of driver ring 7in that they come to rest with pre-biasing on flanks of such profiles or teeth.

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In the depicted exemplary embodiment shown in FIG. On the side of the output part 10 that has the tooth profile 5which side faces away from the annular body, there are connected regions of clamping element 8 in the form of straps running in the circumferential direction and connected with that side of output part The straps ensure axial connection between the two components 8 and Before and during the formation of the plug connection 1 a shown in FIG.Either your web browser doesn't support Javascript or it is currently turned off.

In the latter case, please turn on Javascript support in your web browser and reload this page. Take part in our Impact Survey 15 minutes. Europe PMC requires Javascript to function effectively. Recent Activity. Recent history Saved searches. Abstract Full text links Priority number Classifier. Affiliations All authors 1. Share this article Share with email Share with twitter Share with linkedin Share with facebook.

One part of this clamping unit has a collet for holding the tool, and the other part of the clamping unit has a driven rotary hollow shaft located in the head. The collet is movable lengthwise inside the hollow shaft. To assume its clamped or unclamped position, the collet and hollow shaft are threadable into one another. One of the two parts of the clamping unit has at least one key surface accessible from the exterior at the tool end of the head.

US20130217510A1 - Clamping device for a shaft-hub connection - Google Patents

The other part of the clamping unit has also at least one key surface accessible from the exterior. A U-shaped carrier is provided with a first flange having a stationary key with parts for engagement with the key surfaces located at the tool end of the head.

The other flange of the carrier has a pin-shaped key projecting into the area between the two flanges and axially movable in a hollow space of an exterior attachment of this other flange against the action of a spring in the direction away from the first flange. The pin-shaped key can be rotated manually by means of a knob on the key and projecting from the attachment.

The pin-shaped key has a handle mounted on the U-shaped carrier and is actuatable by finger pressure applied transversely to the longitudinal axis of the key to axially move the key against the action of the spring.

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Updated hourly. Dental Rubber Dam Clamp for incisors and Canines 00, 2 pcs. Dental Rubber Dam Clamp Set. Stoke Rubber Dam Clamp Forcep, 6. Brewer Rubber Dam Clamp Forceps Back to top. Get to Know Us. Amazon Payment Products. English Choose a language for shopping. Amazon Music Stream millions of songs.

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A brilliant tool from a car jack! How happy I am with this tool!

Amazon Second Chance Pass it on, trade it in, give it a second life.As more people are working from home to reduce non-essential travel, our technical sales engineers can provide online equipment demos or training sessions via web-based video calls. If possible, send in your own samples and our sales team will be able to present your own products being tested.

Get in touch to discuss your requirements and to arrange an online demo or training session. The resistance to slippage of the eyelet crimp at the centre of a dental abrasive disk is a key measure of the quality of the product.

The test is to check for any relative rotational slippage between the two components under an applied torque. An improved process was implemented with a quick-change custom fixture, an automated test program and the added capability to export the data results for further analysis and SPC monitoring. A global supplier of medical equipment manufactures dental finishing disks for shaping, contouring and polishing. The company wanted to improve its overall process for testing the integrity of the disk.

Clamping device for dental tools

The test involves applying a pre-set torque to the eyelet and then making a visual check to see whether it has slipped relative to the abrasive disk. Mecmesin designed and manufactured a custom fixture for rapid batch testing of the different sizes of abrasive disk on a Vortex-i automated torque tester.

Prior to testing, the specimen is marked across both disk and eyelet to clearly indicate if breakaway occurs. A clamp secures the outer disk, and a conical probe engages the eyelet to exert the appropriate torque. The EmperorTM software controls the Vortex-i torque tester to apply the specified torque at a constant 5. After the test, the specimen is removed from the fixture and the marks checked for indication of rotation of the abrasive part against the eyelet.

If representative samples show sufficient resistance to breakaway under the applied torque, the batch can be accepted. If not, then adjustments to the crimping machine can be made. Got a question about this system? Get in touch and speak to one of our Technical Sales Engineers now The Helixa-i is a top of the range torque tester controlled by software running on a PC.

Designed for precision torque applications where torque forces may be very small and accuracy is the priority. The Helixa-xt is a top of the range torque tester controlled by a touchscreen console. The Helixa-i is a precision torque tester controlled by software running on a PC. With a wide range of precision fixtures, the Helixa-i is easy to use and optimised for measuring torque from 1 mN. The Vortex-i is a top of the range torque tester controlled by software running on a PC.

Accurate, easy to use and optimised for measuring static torque up to 10 N. The ultimate flexible solution for automated torque testing of a wide range of closures and components. The Vortex-xt is a multi-functional torque tester controlled by a touch-screen console.

Rated up to 10 N.The clamping device of the invention will be described hereinbelow with reference to a dental tool holder for a root canal tool, but other applications will readily suggest themselves.

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The needle or other tool employed for cleaning the root canal of a tooth must penetrate to the very bottom of the canal, but must not penetrate the bottom. It has been proposed to slip a rubber ring over the needle as an abutment which engages an outer surface of the tooth and thereby limits the depth of needle insertion. The rubber ring is compressible and does not hold the needle in a precisely defined end position.

Moreover, the working end of many root canal tools is enlarged and makes it difficult to slip the ring over the needle shaft. Other proposed abutments share at least some of the disadvantages of the rubber ring and are relatively difficult to handle.

The primary object of this invention is the provision of a clamping device which is attached to a root canal tool in a simple manner, yet precisely defines the available depth of tool insertion in a root canal. With this object and other in view, the clamping device of the invention includes a body member and a sleeve member secured to each other for angular movement about an axis between two relative positions.

Respective portions of bores in the two members constitute parts of a continuous, elongated receptacle in each of the two positions.

In one position, the bore portions are aligned. In the other position, they are offset transversely of the direction of receptacle elongation. Other features, additional objects, and many of the attendant advantages of this invention will readily be appreciated as the same becomes better understood by reference to the appended drawing in which:.

The clamping device 10 consists of a cylindrical body 12 and of a cylindrical sleeve 14 conformingly received in an axially terminal portion of a bore 16 of the body 12 for angular movement about the common axis of the body 12 and sleeve 14 which is also the axis of the two cylindrical, terminal portions of the bore The sleeve 14 axially projects outward of the bore 16 and is axially secured in the bore 16 by a radial flange 18 projecting from the body 12 into an annular, circumferential groove 20 of the sleeve The bore 22 of the sleeve 14 is cylindrical about an axis parallel to, but slightly offset from the afore-mentioned common axis.

The reduced central portion 24 of the bore 16 is equal in cross section to the bore 22 and equally eccentric so that the bore 22 and the bore portion 24 may be aligned to form respective sections of a continuous receptacle of uniform cross section in the angular position of the sleeve 14 illustrated in FIG. Turning of the sleeve 14 in the bore 16 is facilitated by knurls 30 in the outer, cylindrical surface of the body 12 and by two opposite flats 32 or other non-circular configuration on the projecting part of the sleeve 14 which are parallel to the axis of angular sleeve movement and to each other and are conveniently gripped by a small wrench.

When the bores 22, 24 are in the aligned position of FIG. The freely projecting end of the tool is readily set to the desired length.

A head 36 on the other end of the shaft 34 prevents the tool from slipping too far out of the clamping device. The shaft 34 thereafter is clamped between the body 12 and the sleeve 14 by turning the body and sleeve relative to each other about the common axis into the position shown in FIG.

Prior to assembly of the clamping device, the portion of the bore 16 receiving the sleeve 14 has smooth, cylindrical walls. After insertion of the sleeve, the rim of the body 12 about the orifice of the bore 16 is beaded into the groove 20 of the sleeve 14 to constitute the radial flange While tool shafts varying somewhat in diameter may be secured in the same clamping device of the invention and merely require different angular clamping movement of the body 12 and sleeve 14, it is preferred that the difference between the outer diameter of the tool shaft and the inner diameter of the bores 22, 24 be small enough so that friction will hold the body and sleeve in the angular clamping position.

The materials of construction chosen for the body 12, the sleeve 14, and the shaft 34 will thus affect the versatility of the clamping device to some extent in a predictable manner. During its intended use, the body 14 provides a handle for the root canal tool, and the radial end face of the sleeve 14 limits the depth of insertion of the tool by abuttingly engaging a tooth surface when the tool reaches its innermost position in the root canal.

It should be understood, of course, that the foregoing disclosure relates only to a preferred embodiment of the invention, and that it is intended to cover all changes and modifications of the example of the invention herein chosen for the purpose of the disclosure which do not constitute departure from the spirit and scope of the invention set forth in the appended claims.

All rights reserved. Login Sign up.Shaft Locking Devices Digital Catalog. Shaft Locking Devices Catalog pdf.

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Shaft Locking Device Applications Guide pdf. Lovejoy Shaft Locking Devices connect hubs solidly to shafts, using a keyless mechanical interference fit, to transmit torque or to withstand axial thrust. This mechanical interference fit utilizes screw tension in the Shaft Locking Device, converted into radial pressure via an inclined plane.

This pressure expands the Shaft Locking Device to eliminate the gap between the hub and the shaft. This connection is easily releasable to remove the mechanical interference fit. Shaft Locking Devices expand to fill the gap between the shaft and hub, allowing for easy installation and removal, saving time over traditional interference fit techniques.

The contact pressures created using a Shaft Locking Device can be greater than traditional interference fit pressures, allowing for more torque to be transmitted or shorter hubs to be used. The easy installation also allows the hub to be positioned more accurately on the shaft, and can facilitate angular timing of the hub.

Lovejoy has an extensive collection of both internal and external shaft locking devices. Shaft Locking Devices Connects hubs solidly to shafts using keyless mechanical interference fit Wide selection available — 9 types; internal and external devices Easy device installation and removal.

Shaft Locking Devices Product Information. Shaft Locking Devices Additional Resources. Dimensional Data. Versus Traditional Keyed connections No Backlash due to fit tolerances No impact effect from reversing loads Ability to adjust axial position and angular timing No fretting corrosion due to movement at the fit interface. External Shaft Locking Device Type. SLD Self-centering, external shaft locking device.

Typical applications: conveyors, mixers, small machine tools, mower traction drives, printing equipment, packaging machines, and belt tensioners. Internal Shaft Locking Device Type. Low torque, external shaft locking device Small radial dimensions Can be combined for greater torque capacity Also available with cut ring Metric shafts 6mm to mm larger upon request 1.

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hub clamping device dental

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