Shaft grounding ring and method for production thereof
AssigneesZF Friedrichshafen AG, KACO GmbH + Co. KG
InventorsMichael Griesbach, Bernhard Sauter, Jochen Bantel, Dennis von Olnhausen
Life of this patent
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Abstract
A method for producing a shaft grounding ring includes providing a shaft grounding ring having an annular main body and contact elements arranged on the main body. The contact elements are electrically conductive and plastic-based. The contact elements are configured to establish an electrically conductive sliding contact with a circumferential surface of a shaft or of a sleeve placed onto the shaft. The contact elements are elastically bendable such that the contact elements are configured to preload the electrically conductive sliding contact. Additionally, the method includes thermally preconditioning the shaft grounding ring before use.
Claims13
A method for producing a shaft grounding ring (E), comprising:
- providing a shaft grounding ring (E) having an annular main body (EG) and contact elements (EK) arranged on the main body (EG), the contact elements (EK) being electrically conductive and plastic-based, the contact elements (EK) being configured to establish an electrically conductive sliding contact (K) with a circumferential surface (C) of a shaft (W) or of a sleeve (H) placed onto the shaft (W), the contact elements (EK) being elastically bendable such that the contact elements (EK) are configured to preload the electrically conductive sliding contact (K);
- and
- thermally preconditioning the shaft grounding ring (E) such that the plastic-based contact elements (EK) undergo thermal aging before use,
- wherein thermally preconditioning the shaft grounding ring (E) comprises heating the shaft grounding ring to a defined temperature range from 75 degrees Celsius to 180 degrees Celsius for a time period between 15 minutes and 120 minutes,
- wherein thermally preconditioning the shaft grounding ring (E) comprises an inherent bending elasticity based preloading of the contact elements (EK) of the shaft grounding ring (E) during the thermal preconditioning, and
- wherein preloading the contact elements (EK) of the shaft grounding ring (E) during the thermal preconditioning comprises preloading the contact elements (EK) on a diameter of a test shaft (PW), the diameter of the test shaft (PW) corresponding to a diameter of the circumferential surface (C) of the shaft or of the sleeve.
A shaft grounding ring (E), comprising:
- an annular main body (EG) having contact elements (EK) arranged on the main body (EG), the contact elements (EK) being electrically conductive and plastic-based, the contact elements (EK) being configured to establish an electrically conductive sliding contact (K) with a circumferential surface (C) of a shaft (W) or of a sleeve (H) placed onto the shaft (W), the contact elements (EK) being elastically bendable such that the contact elements (EK) are configured to preload the electrically conductive sliding contact (K),
- wherein the shaft grounding ring (E) is configured to be thermally preconditioned such that the plastic-based contact elements (EK) are configured to be thermally aged before use,
- wherein thermally preconditioning the shaft grounding ring (E) comprises heating the shaft grounding ring to a defined temperature range from 75 degrees Celsius to 180 degrees Celsius for a time period between 15 minutes and 120 minutes,
- wherein thermally preconditioning the shaft grounding ring (E) comprises an inherent bending elasticity based preloading of the contact elements (EK) of the shaft grounding ring (E) during the thermal preconditioning, and
- wherein preloading the contact elements (EK) of the shaft grounding ring (E) during the thermal preconditioning comprises preloading the contact elements (EK) on a diameter of a test shaft (PW), the diameter of the test shaft (PW) corresponding to a diameter of the circumferential surface (C) of the shaft or of the sleeve.
Dependencies are inferred from the claim text.