DE102012103859A1 - Method for assembling torque sensor device at steering shaft of steering system, involves pressing mounting sleeve on roughened connection section of steering shaft with axial force, and heating wall of mounting sleeve from outside - Google Patents
Method for assembling torque sensor device at steering shaft of steering system, involves pressing mounting sleeve on roughened connection section of steering shaft with axial force, and heating wall of mounting sleeve from outside Download PDFInfo
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- DE102012103859A1 DE102012103859A1 DE201210103859 DE102012103859A DE102012103859A1 DE 102012103859 A1 DE102012103859 A1 DE 102012103859A1 DE 201210103859 DE201210103859 DE 201210103859 DE 102012103859 A DE102012103859 A DE 102012103859A DE 102012103859 A1 DE102012103859 A1 DE 102012103859A1
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- steering shaft
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
- B29C65/18—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/56—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using mechanical means or mechanical connections, e.g. form-fits
- B29C65/565—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using mechanical means or mechanical connections, e.g. form-fits involving interference fits, e.g. force-fits or press-fits
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/72—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by combined operations or combined techniques, e.g. welding and stitching
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/01—General aspects dealing with the joint area or with the area to be joined
- B29C66/05—Particular design of joint configurations
- B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
- B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
- B29C66/112—Single lapped joints
- B29C66/1122—Single lap to lap joints, i.e. overlap joints
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/01—General aspects dealing with the joint area or with the area to be joined
- B29C66/05—Particular design of joint configurations
- B29C66/20—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines
- B29C66/21—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being formed by a single dot or dash or by several dots or dashes, i.e. spot joining or spot welding
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/01—General aspects dealing with the joint area or with the area to be joined
- B29C66/05—Particular design of joint configurations
- B29C66/303—Particular design of joint configurations the joint involving an anchoring effect
- B29C66/3032—Particular design of joint configurations the joint involving an anchoring effect making use of protrusions or cavities belonging to at least one of the parts to be joined
- B29C66/30321—Particular design of joint configurations the joint involving an anchoring effect making use of protrusions or cavities belonging to at least one of the parts to be joined making use of protrusions belonging to at least one of the parts to be joined
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
- B29C66/51—Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles
- B29C66/53—Joining single elements to tubular articles, hollow articles or bars
- B29C66/534—Joining single elements to open ends of tubular or hollow articles or to the ends of bars
- B29C66/5344—Joining single elements to open ends of tubular or hollow articles or to the ends of bars said single elements being substantially annular, i.e. of finite length, e.g. joining flanges to tube ends
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
- B29C66/73—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset
- B29C66/731—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the intensive physical properties of the material of the parts to be joined
- B29C66/7316—Surface properties
- B29C66/73161—Roughness or rugosity
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
- B29C66/74—Joining plastics material to non-plastics material
- B29C66/742—Joining plastics material to non-plastics material to metals or their alloys
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/80—General aspects of machine operations or constructions and parts thereof
- B29C66/83—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools
- B29C66/832—Reciprocating joining or pressing tools
- B29C66/8322—Joining or pressing tools reciprocating along one axis
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D6/00—Arrangements for automatically controlling steering depending on driving conditions sensed and responded to, e.g. control circuits
- B62D6/08—Arrangements for automatically controlling steering depending on driving conditions sensed and responded to, e.g. control circuits responsive only to driver input torque
- B62D6/10—Arrangements for automatically controlling steering depending on driving conditions sensed and responded to, e.g. control circuits responsive only to driver input torque characterised by means for sensing or determining torque
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D1/00—Couplings for rigidly connecting two coaxial shafts or other movable machine elements
- F16D1/06—Couplings for rigidly connecting two coaxial shafts or other movable machine elements for attachment of a member on a shaft or on a shaft-end
- F16D1/064—Couplings for rigidly connecting two coaxial shafts or other movable machine elements for attachment of a member on a shaft or on a shaft-end non-disconnectable
- F16D1/072—Couplings for rigidly connecting two coaxial shafts or other movable machine elements for attachment of a member on a shaft or on a shaft-end non-disconnectable involving plastic deformation
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L3/00—Measuring torque, work, mechanical power, or mechanical efficiency, in general
- G01L3/02—Rotary-transmission dynamometers
- G01L3/04—Rotary-transmission dynamometers wherein the torque-transmitting element comprises a torsionally-flexible shaft
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/01—General aspects dealing with the joint area or with the area to be joined
- B29C66/32—Measures for keeping the burr form under control; Avoiding burr formation; Shaping the burr
- B29C66/322—Providing cavities in the joined article to collect the burr
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Power Steering Mechanism (AREA)
Abstract
Description
Die Erfindung bezieht sich auf ein Verfahren zur Montage einer Drehmomentsensoreinrichtung an einer Lenkwelle nach dem Oberbegriff des Anspruches 1. The invention relates to a method for mounting a torque sensor device on a steering shaft according to the preamble of claim 1.
Aus der
Gemäß eines weiteren Ausführungsbeispieles aus der
Der Erfindung liegt die Aufgabe zu Grunde, mit einfachen Maßnahmen eine feste Verbindung zwischen einer Lenkwelle eines Lenksystems und einer Drehmomentsensoreinrichtung zu schaffen. The invention is based on the object with simple measures to create a firm connection between a steering shaft of a steering system and a torque sensor device.
Diese Aufgabe wird erfindungsgemäß mit den Merkmalen des Anspruches 1 gelöst. Die Unteransprüche geben zweckmäßige Weiterbildungen an. This object is achieved with the features of claim 1. The dependent claims indicate expedient developments.
Die Lenkwelle ist Bestandteil eines Lenksystems in einem Fahrzeug zur Übertragung der Lenkbewegung vom Lenkrad auf die lenkbaren Räder. Das Lenksystem kann ggf. mit einer Lenkunterstützungseinrichtung, beispielsweise einem elektrischen Servomotor zur Erzeugung eines unterstützenden Servomoments ausgestattet sein. Die Höhe des Servomomentes bestimmt sich unter anderem nach dem vom Fahrer vorgegebenen Lenkmoment. The steering shaft is part of a steering system in a vehicle for transmitting the steering movement from the steering wheel to the steerable wheels. The steering system may optionally be equipped with a steering assistance device, for example an electric servo motor for generating a supporting servo torque. The amount of the servo torque is determined, inter alia, according to the driver's steering torque.
Zur Detektierung des Lenkmomentes ist eine Drehmomentsensoreinrichtung an der Lenkwelle angeordnet, wobei über die Drehmomentsensoreinrichtung aus der Relativverdrehung zwischen zwei Lenkwellenabschnitten das Lenkmoment ermittelt wird. Die Drehmomentsensoreinrichtung umfasst einen Signalgeber am ersten Lenkwellenabschnitt, beispielsweise einen Permanentmagneten, und ein Sensorelement zur Detektierung der abgegebenen Signale am zweiten Lenkwellenabschnitt. Die Drehmomentsensoreinrichtung weist eine Kunststoff-Befestigungshülse auf mit dem darin aufgenommenen Sensor. Die Verbindung des Sensors mit dem Lenkwellenabschnitt erfolgt über die Befestigungshülse, die auf einem Verbindungsabschnitt des Lenkwellenabschnittes aufsitzt. For detecting the steering torque, a torque sensor device is arranged on the steering shaft, wherein the steering torque is determined via the torque sensor device from the relative rotation between two steering shaft sections. The torque sensor device comprises a signal generator on the first steering shaft section, for example a permanent magnet, and a sensor element for detecting the emitted signals on the second steering shaft section. The torque sensor device has a plastic mounting sleeve with the sensor received therein. The connection of the sensor with the steering shaft section via the mounting sleeve, which rests on a connecting portion of the steering shaft section.
Die Befestigung der Drehmomentsensoreinrichtung an der Lenkwelle erfolgt in zwei Verfahrensschritten. Zunächst wird in einem ersten Schritt die Befestigungshülse aus Kunststoff mit axialer Kraft auf den Verbindungsabschnitt der Lenkwelle aufgepresst, der eine aufgeraute Oberfläche besitzt, wobei die Befestigungshülse bezogen auf den Verbindungsabschnitt der Lenkwelle als Presspassung ausgebildet ist. Aufgrund der Ausführung der Befestigungshülse aus einem Kunststoffmaterial schneidet sich die aufgeraute Oberfläche des Verbindungsabschnittes der Lenkwelle in die Innenwand der Befestigungshülse, wodurch bereits eine formschlüssige Verbindung zwischen der Befestigungshülse und der Lenkwelle erreicht wird. Zweckmäßigerweise erfolgt das axiale Aufpressen der Befestigungshülse auf den Verbindungsabschnitt der Lenkwelle im ersten Montageschritt im nicht-erwärmten Zustand sowohl des Verbindungsabschnittes der Lenkwelle als auch der Befestigungshülse, es wird somit die Befestigungshülse im kalten Zustand auf den Verbindungsabschnitt der Lenkwelle aufgeschoben. Bevorzugt wird im ersten Montageschritt die Befestigungshülse axial bis zum Erreichen ihrer Endposition aufgeschoben. The attachment of the torque sensor device to the steering shaft is carried out in two steps. First, in a first step, the mounting sleeve made of plastic is pressed with axial force on the connecting portion of the steering shaft, which has a roughened surface, wherein the mounting sleeve is formed with respect to the connecting portion of the steering shaft as a press fit. Due to the design of the mounting sleeve made of a plastic material, the roughened surface of the connecting portion of the steering shaft intersects with the inner wall of the mounting sleeve, whereby a positive connection between the mounting sleeve and the steering shaft is already achieved. Conveniently, the axial pressing of the mounting sleeve takes place on the connecting portion of the steering shaft in the first assembly step in the non-heated state of both the connecting portion of the steering shaft and the mounting sleeve, it is thus pushed the mounting sleeve in the cold state on the connecting portion of the steering shaft. Preferably, in the first assembly step, the fastening sleeve is pushed axially until it reaches its end position.
Daran schließt sich der zweite Montageschritt an, bei dem die Wandung der Befestigungshülse von außen erwärmt wird. Durch das Erwärmen des Kunststoffmaterials der Befestigungshülse wird die Wandung zumindest abschnittsweise in den plastischen, zähflüssigen Zustand überführt, wodurch die Innenwand der Befestigungshülse mit der Oberfläche des Verbindungsabschnittes verbackt und die Verbindung zwischen Befestigungshülse und Verbindungsabschnitt weiter verbessert wird. Es können beispielsweise verbliebene Zwischenräume zwischen der Oberfläche des Lenkwellenverbindungsabschnittes und der Innenwand der Befestigungshülse durch das Kunststoffmaterial der Befestigungshülse ausgefüllt werden. This is followed by the second assembly step, in which the wall of the fastening sleeve is heated from the outside. By heating the plastic material of the fastening sleeve, the wall is at least partially transferred into the plastic, viscous state, whereby the inner wall of the fastening sleeve bakes with the surface of the connecting portion and the connection between the fastening sleeve and connecting portion is further improved. For example, remaining gaps between the surface of the steering shaft connecting portion and the inner wall of the fastening sleeve can be filled by the plastic material of the fastening sleeve.
Vorteilhaft ist es des Weiteren, dass der Lenkwellenverbindungsabschnitt nicht erwärmt werden muss. Dies vereinfacht und verkürzt den Montageprozess, da die Erwärmung des Lenkwellenverbindungsabschnittes mit einer erhöhten Wärmeaufnahme verbunden ist und vor dem Aufpressen der Befestigungshülse durchgeführt werden muss. Vorteilhaft ist außerdem, dass das Einschneiden der Struktur in die Innenwand der Befestigungshülse und der Plastifizierungsprozess während der Erwärmung in zwei unterschiedlichen, zeitlich aufeinander folgenden Schritten erfolgt. Der Plastifizierungsprozess der Kunststoff-Befestigungshülse kann auf diese Weise besser und zielgenauer gesteuert werden. It is also advantageous that the steering shaft connection section does not have to be heated. This simplifies and shortens the assembly process, since the heating of the steering shaft connecting portion is associated with an increased heat absorption and must be carried out before the attachment sleeve is pressed on. It is also advantageous that the cutting of the structure into the inner wall of the fastening sleeve and the plasticizing process takes place during the heating in two different, temporally successive steps. The Plastifizierungsprozess the plastic mounting sleeve can be controlled in this way better and more targeted.
Der Lenkwellenverbindungsabschnitt weist in bevorzugter Ausführung eine Verzahnung auf, beispielsweise eine Kerbverzahnung, auf die die Befestigungshülse im ersten Schritt aufgepresst wird. Die Innenwand der Befestigungshülse ist vorzugsweise glatt ausgebildet, wobei mit dem Aufpressen eine Gegenkontur in die Innenwand eingeschnitten wird. Die Verzahnung auf dem Lenkwellenverbindungsabschnitt stellt eine bevorzugte Ausführung der aufgerauten Oberfläche am Verbindungsabschnitt dar. In Betracht kommen aber auch sonstige aufgeraute Oberflächen, beispielsweise eine Rändelung. The steering shaft connecting portion has in a preferred embodiment, a toothing, for example, a serration to which the mounting sleeve is pressed in the first step. The inner wall of the fastening sleeve is preferably formed smooth, with the pressing a counter contour is cut into the inner wall. The toothing on the steering shaft connecting section represents a preferred embodiment of the roughened surface on the connecting section. However, other roughened surfaces, for example a knurling, are also suitable.
Im zweiten Schritt, der mit einer von außen erfolgenden Erwärmung der Wandung der Befestigungshülse einhergeht, wird, gemäß weiterer zweckmäßiger Ausführung, die Wandung der Befestigungshülse radial gegen den innen liegenden Verbindungsabschnitt der Lenkwelle gedrückt. Somit werden im zweiten Montageschritt zwei einzelne Vorgänge durchgeführt: Zum einen die Erwärmung der Befestigungshülse, um den Kunststoff der Befestigungshülse zähflüssiger zu machen; zum andern der radial nach innen gerichtete Druck auf die Außenwandung der Befestigungshülse, wodurch die Innenwand der Befestigungshülse gegen die Oberfläche des Lenkwellenverbindungsabschnittes gedrückt wird und das zähflüssige Kunststoffmaterial der Befestigungshülse in Kavitäten eindringen kann. In the second step, which is accompanied by an external heating of the wall of the fastening sleeve, the wall of the fastening sleeve is pressed radially against the inner connecting portion of the steering shaft, according to further expedient embodiment. Thus, in the second assembly step, two separate operations are performed: First, the heating of the mounting sleeve to make the plastic of the mounting sleeve viscous; on the other hand, the radially inwardly directed pressure on the outer wall of the fastening sleeve, whereby the inner wall of the fastening sleeve is pressed against the surface of the steering shaft connecting portion and the viscous plastic material of the fastening sleeve can penetrate into cavities.
Grundsätzlich ist es ausreichend, dass das Aufbringen der Wärme und der radiale Druck über voneinander sich unterscheidende Einrichtungen erzeugt werden. Gemäß einer bevorzugten Ausführung ist aber vorgesehen, dass die Wärme und der Druck im Heißverprägeverfahren in einem gemeinsamen Arbeitsschritt erzeugt werden, wofür zum Beispiel ein Heißverprägestempel verwendet wird, der radial von außen gegen die Befestigungshülse gedrückt wird und zugleich Wärme auf die Befestigungshülse überträgt. Das Heißverprägeverfahren hat zudem den Vorteil, dass zielgerichtet definierte Abschnitte der Wandung der Befestigungshülse mit Wärme und radialem Druck beaufschlagt werden können. Es ist insbesondere möglich, beispielsweise nur einen definierten axialen Abschnitt der Befestigungshülse durch das Aufbringen von Wärme und radial nach innen gerichtetem Druck zu verformen, wohingegen die übrigen axialen Abschnitte der Befestigungshülse nicht im Heißverprägeverfahren geformt werden. In principle, it is sufficient that the application of the heat and the radial pressure are generated via devices differing from each other. According to a preferred embodiment, however, it is provided that the heat and the pressure are produced in the hot embossing process in a joint operation, for which a Heißverprägestempel is used, for example, which is pressed radially from the outside against the mounting sleeve and at the same time transfers heat to the mounting sleeve. The Heißverprägeverfahren also has the advantage that targeted defined sections of the wall of the mounting sleeve can be acted upon with heat and radial pressure. It is particularly possible, for example, to deform only a defined axial portion of the fastening sleeve by the application of heat and radially inwardly directed pressure, whereas the remaining axial portions of the fastening sleeve are not formed in the hot stamping process.
In die Außenkontur des Lenkwellenverbindungsabschnittes kann eine Umfangsnut eingebracht sein, welche von der aufgepressten Befestigungshülse übergriffen wird. Die Wandung wird zumindest in den Bereich der Befestigungshülse, welcher die Umfangsnut überdeckt, radial gegen den Lenkwellenverbindungsabschnitt gepresst. Durch das gleichzeitige Aufbringen von Wärme wird die Wandung angeschmolzen und kann in die Umfangsnut eingepresst werden. Nach dem Erkalten und Aushärten des Kunststoffes ist eine zusätzliche, feste Formschlussverbindung zwischen der Befestigungshülse und dem Lenkwellenverbindungsabschnitt gegeben. In the outer contour of the steering shaft connecting portion may be introduced a circumferential groove which is overlapped by the pressed-fastening sleeve. The wall is pressed radially against the steering shaft connection section at least in the region of the fastening sleeve which covers the circumferential groove. By the simultaneous application of heat, the wall is melted and can be pressed into the circumferential groove. After cooling and curing of the plastic, an additional, tight positive connection between the mounting sleeve and the steering shaft connecting portion is given.
Die Befestigungshülse ist vorteilhafterweise als ein Kunststoff-Spritzgussbauteil ausgeführt. Grundsätzlich möglich sind aber auch sonstige Kunststoffbauteile, beispielsweise im Sinterverfahren hergestellte Kunststoffteile. The fastening sleeve is advantageously designed as a plastic injection-molded component. In principle, however, other plastic components are also possible, for example plastic parts produced in the sintering process.
Des Weiteren kann es zweckmäßig sein, die Befestigungshülse nach dem Aufbringen auf den Lenkwellenverbindungsabschnitt über zusätzliche Befestigungsmittel axial und/oder in Umfangsrichtung am Lenkwellenverbindungsabschnitt zu sichern. In Betracht kommt zum Beispiel ein Axialsicherungselement zur axialen Sicherung der Befestigungshülse am Verbindungsabschnitt. Furthermore, it may be expedient to secure the attachment sleeve axially and / or in the circumferential direction on the steering shaft connection section after application to the steering shaft connection section via additional attachment means. Considered, for example, an axial securing element for axially securing the fastening sleeve at the connecting portion.
Die Befestigungshülse kann in dem Bereich, der der Erwärmung unterzogen wird, eine Wandung mit reduzierter Wandstärke aufweisen, beispielsweise mit einer Abflachung, einer Vertiefung oder einer Bohrung versehen sein, wobei es zweckmäßig ist, dass die Wandung nicht durchbrochen ist. Sofern die Erwärmung durch Annähern eines Heißverprägestempels aufgebracht wird, kann die Außenkontur der Wandung mit reduzierter Wandstärke an die Stirnkontur des Heißverprägestempels angepasst sein, beispielsweise, indem der Querschnitt der Vertiefung, die in die Wandung der Befestigungshülse eingebracht ist, und der Querschnitt des Heißverprägestempels aneinander angepasst sind. Zum Beispiel kann im Falle einer in die Wandung eingebrachten, kreisrunden Bohrung auch der Heißverprägestempel einen runden Querschnitt aufweisen oder in die Wandung und in die Stirnseite des Stempels jeweils eine Stufe eingebracht sein, wodurch eine Axialsicherung und eine Sicherung in Umfangsrichtung zwischen Befestigungshülse und Stempel erzielt wird. The mounting sleeve may have a wall of reduced wall thickness, for example a flattening, a depression or a bore, in the region which is subjected to the heating, it being expedient that the wall is not pierced. If the heating is applied by approaching a Heißverprägestempels, the outer contour of the wall with reduced wall thickness can be adapted to the front contour of Heißverprägestempels, for example, by the cross section of the recess, which is introduced into the wall of the mounting sleeve, and the cross section of the Heißverprägestempels adapted to each other are. For example, in the case of introduced into the wall, circular bore and the Heißverprägestempel have a round cross section or be introduced into the wall and in the end face of the punch each have a step, whereby an axial securing and securing in the circumferential direction between the fastening sleeve and punch is achieved ,
Weitere Vorteile und zweckmäßige Ausführungen sind den weiteren Ansprüchen, der Figurenbeschreibung und den Zeichnungen zu entnehmen. Es zeigen: Further advantages and expedient embodiments can be taken from the further claims, the description of the figures and the drawings. Show it:
In den Figuren sind gleiche Bauteile mit gleichen Figuren versehen. In the figures, the same components are provided with the same figures.
In
Wie
BezugszeichenlisteLIST OF REFERENCE NUMBERS
- 1 1
- Lenksystem steering system
- 2 2
- Lenkrad steering wheel
- 3 3
- Lenkwelle steering shaft
- 4 4
- Lenkgetriebe steering gear
- 5 5
- Lenkgestänge steering linkage
- 6 6
- Vorderrad front
- 7 7
- Servoeinrichtung servo
- 12 12
- Lenkwellenabschnitt Steering shaft section
- 13 13
- Verbindungsabschnitt connecting portion
- 14 14
- Befestigungshülse mounting sleeve
- 15 15
- Pfeilrichtung arrow
- 16 16
- Kerbverzahnung serration
- 17 17
- Stirnkante front edge
- 18 18
- Anschlag attack
- 19 19
- Umfangsnut circumferential groove
- 20 20
- Heißverprägungsstempel Heißverprägungsstempel
- 21 21
- Pfeilrichtung arrow
ZITATE ENTHALTEN IN DER BESCHREIBUNG QUOTES INCLUDE IN THE DESCRIPTION
Diese Liste der vom Anmelder aufgeführten Dokumente wurde automatisiert erzeugt und ist ausschließlich zur besseren Information des Lesers aufgenommen. Die Liste ist nicht Bestandteil der deutschen Patent- bzw. Gebrauchsmusteranmeldung. Das DPMA übernimmt keinerlei Haftung für etwaige Fehler oder Auslassungen.This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.
Zitierte PatentliteraturCited patent literature
- DE 102007032907 A1 [0002] DE 102007032907 A1 [0002]
- DE 2007032907 A1 [0003] DE 2007032907 A1 [0003]
Claims (10)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE201210103859 DE102012103859A1 (en) | 2012-05-03 | 2012-05-03 | Method for assembling torque sensor device at steering shaft of steering system, involves pressing mounting sleeve on roughened connection section of steering shaft with axial force, and heating wall of mounting sleeve from outside |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE201210103859 DE102012103859A1 (en) | 2012-05-03 | 2012-05-03 | Method for assembling torque sensor device at steering shaft of steering system, involves pressing mounting sleeve on roughened connection section of steering shaft with axial force, and heating wall of mounting sleeve from outside |
Publications (1)
Publication Number | Publication Date |
---|---|
DE102012103859A1 true DE102012103859A1 (en) | 2013-11-07 |
Family
ID=49384396
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE201210103859 Withdrawn DE102012103859A1 (en) | 2012-05-03 | 2012-05-03 | Method for assembling torque sensor device at steering shaft of steering system, involves pressing mounting sleeve on roughened connection section of steering shaft with axial force, and heating wall of mounting sleeve from outside |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE102012103859A1 (en) |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102007032907A1 (en) | 2006-11-02 | 2008-05-08 | Volkswagen Ag | Steering shaft with torque measuring unit and mounting method |
-
2012
- 2012-05-03 DE DE201210103859 patent/DE102012103859A1/en not_active Withdrawn
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102007032907A1 (en) | 2006-11-02 | 2008-05-08 | Volkswagen Ag | Steering shaft with torque measuring unit and mounting method |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
R163 | Identified publications notified | ||
R163 | Identified publications notified |
Effective date: 20140911 |
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R081 | Change of applicant/patentee |
Owner name: ROBERT BOSCH AUTOMOTIVE STEERING GMBH, DE Free format text: FORMER OWNER: ZF LENKSYSTEME GMBH, 73527 SCHWAEBISCH GMUEND, DE Effective date: 20150423 |
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R119 | Application deemed withdrawn, or ip right lapsed, due to non-payment of renewal fee |