A brake for an electric motor

Abstract

An electric motor comprises a rotor 120, a stator 110 and a bearing 190. The rotor 120, e.g. formed of two sections 150 / 160 and 170, includes a first brake element, e.g. brake drum on inner surface of

Claims

1) An electric motor comprising a rotor, a stator, a first brake element and a second brake element, wherein the first brake element is arranged to be mounted to the rotor and a bearing via one or more removable coupling elements to allow the rotor to be rotatably coupled to the stator, wherein the first brake element has a first surface; the second brake element has a second surface and is mounted to the stator and movable from a first position to a second position, wherein when the second brake element is in the second position the second surface is arranged to be in contact with the first surface to inhibit rotational movement of the rotor relative to the stator, wherein the first brake element is arranged to be dismounted via the removable coupling elements from the rotor and the bearing to allow the first brake element to be moved axially away from the rotor and the stator.2) An electric motor of claim 1, wherein the removable coupling elements comprises one or more rotor fixation holes formed in the rotor and the first brake element has one or more first brake element fixation holes , wherein a coupling member is arranged to interface with a respective rotor fixation hole and a first brake element fixation hole for mounting the rotor to the first brake element.3) An electric motor of claim 1 or 2, wherein the removable coupling elements comprises one or more coupling members arranged to interface with a respective first brake element fixation hole and abearing fixation hole for mounting the bearing to the first brake element.4) An electric motor according to any one of the preceding claims, wherein a wheel is arranged to be mounted to the bearing, wherein the wheel includes one or more fixation holes and the bearing has one or more fixation holes, wherein a coupling member is arranged to interface with a respective fixation hole for the wheel and a bearing fixation hole and a first brake element fixation hole for mounting the bearing to the first brake element.5) An electric motor according to any one of the preceding claims, further comprising one or more coupling elements for coupling the rotor to the stator to allow the rotor to be mounted to the stator when the first brake element is dismounted from the rotor and bearing.6) An electric motor according to any one of the preceding claims, wherein the first surface is formed on an inner radial surface of the first brake element and the second surface is formed on an outer radial surface of the second brake element.7) An electric motor according to any one of the preceding claims, wherein the rotor 120 includes a plurality of magnets arranged around the inside of a cylindrical portion of the rotor.8) An electric motor according to any one of the preceding claims, wherein the stator includes mounting points for mounting the stator to a vehicle.9) An electric motor comprising a stator, a first brake element and a rotor having a first section removablycoupled to a second section via one or more first removable coupling elements, wherein the second section includes a second brake element, wherein the second section is arranged to be mounted to a bearing via one or more second removable coupling elements to allow the rotor to be rotatably coupled to the stator, the first brake element has a first surface and is mounted to the stator and movable from a first position to a second position, wherein the second brake element has a second surface, wherein when the first brake element is in the second position the first surface is arranged to be in contact with the second surface to inhibit rotational movement of the rotor relative to the stator, wherein the second section of the rotor is arranged to be dismounted from the first section of the rotor via the one or more first coupling elements and dismounted from the bearing via the one or more second removable coupling elements to allow the second section of the rotor to be moved axially away from the first section of the rotor while the first section of the rotor is coupled to the stator.10) An electric motor comprising a rotor, a stator, a first brake element and a second brake element, wherein the first brake element is arranged to be mounted to the rotor and a bearing via one or more removable coupling elements to allow the rotor to be rotatably coupled to the stator, wherein the first brake element has a first surface; the second brake element has a second surface and is mounted to the stator and movable from a first position to a second position, wherein when the second brake element is in the second position the second surface is arranged to be in contact with the first surface to inhibit rotational movement of therotor relative to the stator, wherein the first brake element is arranged to be dismounted via the removable coupling elements from the rotor and the bearing to allow the first brake element to be moved axially away from the rotor and the stator, thereby allowing access to the second brake element and / or the bearing.11) A method for allowing servicing of an in-wheel electric motor, wherein the in-wheel electric motor includes a rotor, a stator, a first brake element and a second brake element, wherein the first brake element is arranged to be mounted to the rotor and a bearing via one or more removable coupling elements to allow the rotor to be rotatably coupled to the stator, wherein the first brake element has a first surface; the second brake element has a second surface and is mounted to the stator and movable from a first position to a second position, wherein when the second brake element is in the second position the second surface is arranged to be in contact with the first surface to inhibit rotational movement of the rotor relative to the stator, wherein the first brake element is arranged to be dismounted via the removable coupling elements from the rotor and the bearing to allow the first brake element to be moved axially away from the rotor and the stator, the method comprising removing the first brake element from the rotor while the rotor is coupled to the stator, thereby allowing access to the second brake element and / or the bearing.12) A method according to claim 11, wherein the bearing is removed from the in-wheel electric motor while the stator is mounted to a vehicle.Application No: GB2415963.4Examiner:Mon WrightClaims searched: 1-12Date of search: 12 November 2024Patents Act 1977: Search Report under Section 17Documents considered to be relevant:Category Relevant to claims Identity of document and passage or figure of particular relevance X X X 1-12 1-4, 6-8 1-4, 6-8 US 2015 / 0137669 Al (LAMPIC et al.) See whole document, noting: in-wheel electric motor with rotor formed of plate 2 and tube 3; stator 1; bearing 4 and brake system 5. KR 101004938 Bl (WIA CORP) See whole document, noting: in-wheel motor including rotor 11 with separate drum part 13; stator 12; bearing 14 and drum brake 17. KR 102694026 Bl (HL MANDO CORP) See whole document, noting: in-wheel motor with rotor 411 with separate drum part 421; stator 412; bearing 511 and drum brake 113. Coupling members 441 couple wheel 111, drum 421 and bearing 511 together.Categories: X Document indicating lack of novelty or inventive step A Document indicating technological background and / or state of the art. Y Document indicating lack of inventive step if combined with one or more other documents of same category. P Document published on or after the declared priority date but before the filing date of this invention. & Member of the same patent family E Patent document published on or after, but with priority date earlier than, the filing date of this application.Field of Search:Search of GB, EP, WO &US patent documents classified in the following areas of the UKCX :Worldwide search of patent documents classified in the following areas of the IPC_____________B60K; B60L; B60T; F16D; H02K; H02P______________________________The following online and other databases have been used in the preparation of this search report SEARCH-PATENTInternational Classification:Subclass Subgroup Valid From B60K 0007 / 00 01 / 01 / 2006 F16D 0051 / 10 01 / 01 / 2006 H02K 0007 / 102 01 / 01 / 2006 H02P 0003 / 04 01 / 01 / 2006

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