US-12627182-B2 - Motor apparatus and motor

US12627182B2US 12627182 B2US12627182 B2US 12627182B2US-12627182-B2

Abstract

A motor apparatus, in particular a BLDC motor apparatus, having a rotation axle and a rotor, which includes a base body and which is supported on the rotation axle in a first region and in at least one second region in a manner rotatable relative thereto, wherein a gear element of the rotor is at least arranged in part in the first region. To provide a generic motor apparatus with improved properties in view of a design and a rotor support, it is suggested that the rotor comprises a hollow space about the rotation axle in an intermediate region between the first region and the second region.

Inventors

Volker Denkmann
Helmut Schneider

Assignees

MINEBEA MITSUMI INC.

Dates

Publication Date: 20260512
Application Date: 20231026
Priority Date: 20221027

Claims (12)

1 . A motor apparatus, comprising a rotation axle and a rotor, which includes a base body and which is supported on the rotation axle in a first region and in at least one second region in a manner rotatable relative thereto, wherein a gear element of the rotor is at least arranged in part in the first region, wherein the rotor comprises a hollow space about the rotation axle in an intermediate region between the first region and the second region, and wherein the rotor has a larger material thickness in the first region than in a third region directly adjacent to the first region.
2 . The motor apparatus according to claim 1 , wherein, in the first region, the base body is supported on the rotation axle in a manner rotatable relative thereto and it is integrally formed with the gear element.
3 . The motor apparatus according to claim 1 , wherein the base body is at least largely made of a plastic material.
4 . The motor apparatus according to claim 1 , wherein the base body is formed as an injection molded part.
5 . The motor apparatus according to claim 1 , wherein the base body has a plurality of regions in which a radial distance of the base body varies from the rotation axle.
6 . The motor apparatus according to claim 1 , wherein an extension of the gear element along the rotation axle is larger than an extension of the first region along the rotation axle.
7 . The motor apparatus according to claim 1 , wherein a first sliding contact point of the rotor with the rotation axle in the first region and a second sliding contact point of the rotor with the rotation axle in the second region are respectively made of a plastic material.
8 . The motor apparatus according to claim 7 , wherein the rotor includes a bearing element, which is formed separately from the base body and which includes the second sliding contact point.
9 . The motor apparatus according to claim 8 , wherein the bearing element is at least largely made of a plastic material.
10 . The motor apparatus according to claim 8 , wherein the base body and the bearing element are connected to each other at least in a form-fitting manner.
11 . The motor apparatus according to claim 10 , wherein, in an installed state, the bearing element is fixed on the base body in a pressure-resistant manner.
12 . A motor, comprising the motor apparatus according to claim 7 .

Description

CROSS REFERENCE TO RELATED APPLICATION This application is based on and incorporates herein by reference German Patent Application 10 2022 128 575.8, filed on Oct. 27, 2022. STATE OF THE ART The invention relates to a motor apparatus and to a motor. Motor apparatuses comprising rotors are already known from the state of the art, all of which include a bearing region to provide support on a rotation axle, wherein the bearing region extends along the entire longitudinal extension of the rotor parallel to the rotation axle. Moreover, rotors are known, which include two separate bearing regions for support on the rotation axle, wherein at least in one region of the two regions a ball bearing and/or at least in the other region of the two regions a bearing disc formed of metal is arranged. It is the object of the invention, in particular, to provide a generic motor apparatus with improved properties with respect to a design and a rotor support. The object is achieved according to the invention. ADVANTAGES OF THE INVENTION The invention is based on a motor apparatus, in particular a BLDC motor apparatus, comprising a rotation axle and a rotor, which includes a base body and which is supported on the rotation axle in a first region and in at least a second region in a manner rotatable relative thereto, wherein a gear element of the rotor is at least partially arranged in the first region. It is suggested that the rotor comprises a hollow space about the rotation axle in an intermediate region between the first region and the second region. Such an embodiment can help improve a design and a rotor bearing on a rotation axle. Moreover, efficiency with respect to costs, material, product, manufacturing and/or recycling efficiency can be improved. Furthermore, a design of a rotor can be provided that is particularly cost-effective and/or material-saving. Preferably, the motor apparatus is a part, in particular a subassembly of a motor. It would also be conceivable for the motor apparatus to form the entire motor. The motor apparatus can be an electronically commutated motor apparatus. In particular, the motor apparatus is formed as a BLDC motor apparatus. Advantageously, the motor is an electronically commutated electric motor. Electronically commutated electric motors are commonly referred to as “brushless DC motors” (BLDC motors), whereas they are, however, AC motors, in particular synchronous motors, where commutation is achieved by means of electronic semiconductor components, for example MOSFETs and/or the like, instead of carbon brushes, as is the case with brushed DC motors. The motor is provided to convert electrical energy into mechanical energy, in particular motion energy. In particular in at least one operating state, advantageously the already mentioned operating state, the motor interacts with at least one external structural unit, in particular drives the external structural unit. The external structural unit can be, for example, a gear or the like for the transmission of mechanical energy to at least one further structural unit. For example, the further structural unit could be a door handle, which is able to be mechanically unlocked and/or locked by means of the motor. The further structural unit can be any component deemed suitable to the person skilled in the art in the context of the present invention. Preferably, in the operating state, the motor is arranged in a housing unit formed separately from the motor. Advantageously, the external structural unit and/or at least the further structural unit is arranged on and/or within the housing unit. The external structural unit and/or at least the further structural unit can also be part of the housing unit and can form a subassembly of the housing unit. The motor can be manufactured and/or produced independently from the housing unit, for example by the same or different companies. In particular, the motor is able to be installed in the housing unit at a later time, in particular after the motor and the housing unit have each been manufactured separately. Advantageously, the housing unit comprises at least one bearing region specially provided and/or formed for the motor, in particular as a function of shape, size and/or configuration of the motor, wherein the motor can be installed in the housing unit and/or can be positioned within the housing unit. Preferably, in the operating state and at least in an assembled state, the motor is supported and/or arranged and/or positioned in the bearing region within the housing unit. In particular, in the assembled state, the motor apparatus is supported and/or arranged and/or positioned within the housing unit. Preferably, in the operating state and in the assembled state, the rotor is supported and/or arranged in the bearing region rotatably about the rotation axle. Particularly preferably, in the operating state, the rotor is rotatably supported within a stator. Preferably, the motor apparatus comprises the stat