Electric motor assembly for an air outlet actuator of a motor vehicle air conditioning system

Abstract

Electric motor assembly for an air outlet actuator of a motor vehicle air conditioning system, characterized in that it comprises: an electric motor assembly disposed in a mounting cavity formed by an upper housing and a lower housing of the actuator, the electric motor assembly comprising a stator assembly and a rotor assembly separable therefrom; wherein the stator assembly comprises a first end and a second end of a stator housing; wherein the rotor assembly comprises a rotor rotating shaft arranged separably from the stator housing along a Y-axis direction; wherein a bearing for supporting and an elastic member are provided at a location of the rotor rotating shaft near the second end of the stator housing, the elastic member cooperating with the bearing and the second end of the stator housing so that the elastic member continuously exerts an elastic force along the Y-axis direction on the rotor rotating shaft via the bearing.

Description

Technical area

[0001] The present utility model relates to the field of mechanics and drive technology, in particular to an electric motor assembly for an air outlet actuator of a motor vehicle air conditioning system. State of the art

[0002] With the innovative development of the automotive industry, especially the rapid progress in technologies such as new energy sources and autonomous driving, automotive electronic systems are widely used and have become an essential part of vehicles. Their performance directly affects the driving characteristics, fuel economy, reliability, safety, and comfort of vehicles. The working principle of an automotive air conditioning louver actuator is that a micromotor rotates at high speed after being energized, its speed is reduced by a gear system, and finally, a certain torque and speed are output through an output gear. Then, a corresponding louver is pushed via a connecting rod, thereby realizing the opening, closing, and angle adjustment functions of the automotive air conditioning louver.

[0003] In the current state of the art, noise occurs when using an air damper actuator. One reason for the noise generated by existing air damper actuators lies in the design of commercially available actuators, in which an electric motor rotor and an electric motor stator are designed to be separable, with the rotor typically having no or only one-sided axial limitation. With this design, disturbing noises often occur during changes in direction, and the axial stability and reliability of the rotor require improvement. Description of the invention

[0004] By providing an electric motor assembly for an air outlet actuator of a motor vehicle air conditioning system, embodiments of the present application eliminate the axial play of the rotor rotating shaft of the electric motor, improve the stability of the rotor rotating shaft of the electric motor, and thus reduce disturbing noises due to axial collisions.

[0005] According to the present utility model, the problem is solved by the following technical solution: an electric motor assembly for an air outlet actuator of a motor vehicle air conditioning system comprises: an electric motor assembly disposed in a mounting cavity formed by an upper housing and a lower housing of the actuator, the electric motor assembly comprising a stator assembly and a rotor assembly separable therefrom; wherein the stator assembly comprises a first end and a second end of a stator housing; wherein the rotor assembly comprises a rotor rotating shaft arranged separably from the stator housing along a Y-axis direction; wherein a bearing for supporting and an elastic element are provided at a location of the rotor rotating shaft near the second end of the stator housing, the elastic element cooperating with the bearing and the second end of the stator housing so that the elastic element continuously exerts an axial elastic force on the rotor rotating shaft via the bearing.

[0006] As a further development, it is provided that the elastic element is a spring plate, in the center of which a bearing fitting hole is provided, which is enclosed by several spaced and evenly distributed limiting strips, wherein a region of the spring plate located near the outer circumference is provided with an annular positioning section.

[0007] As a further development, it is provided that the spring plate is arranged on an outer end surface of the second end of the stator housing, wherein the upper end of the positioning section of the spring plate abuts the outer end surface of the second end of the stator housing, and wherein the lower end of the bearing is inserted sequentially into a housing through-hole in the central region of the second end of the stator housing and into the bearing fitting hole, so that the limiting strips abut the outer peripheral wall of the bearing.

[0008] As a further development, it is provided that the outer end surface of the second end of the stator housing is firmly connected to the positioning section of the spring plate.

[0009] As a further development, it is provided that the outer end surface of the second end of the stator housing and the spring plate are detachably connected to one another, wherein the lower housing and the outer end surface of the second end of the stator housing cooperate with one another to limit the positioning section of the spring plate.

[0010] As a further development, it is provided that the spring plate is arranged on an inner end surface of the second end of the stator housing, wherein the lower end of the bearing is inserted sequentially into the housing through-hole in the central region of the second end of the stator housing and into the bearing fitting hole, so that the lower end of a shaft shoulder of the bearing rests on the upper end surfaces of the limiting strips and the limiting strips rest on the outer peripheral wall of the bearing.

[0011] As a further development, it is provided that the electric motor assembly further comprises a back cover plate which is arranged between the outer end surface of the second end of the stator housing and the lower housing of the actuator, wherein the end of the bearing is additionally inserted into a cover plate through-hole in the central region of the back cover plate.

[0012] As a further development, it is provided that the lower housing is provided with a limiting recess which is assigned to the bearing, wherein the end of the bearing is additionally inserted into the limiting recess.

[0013] As a further development, the elastic element comprises an elastic ring that is pushed onto the outer peripheral wall of the bearing so that the upper end of the elastic ring rests against the lower end of the shaft shoulder of the bearing, the lower end of the elastic ring rests against the stator housing, and the lower end of the bearing is inserted into the housing through-hole in the central region of the second end of the stator housing. As a further development, the elastic element is made of metal or rubber. Compared to the prior art, the present utility model is characterized by the following advantages: By additionally providing a bearing and an elastic element at one end of the rotor rotating shaft, it is ensured that both ends of the rotor rotating shaft are constantly in contact with the bearing, effectively eliminating the axial play of the rotor rotating shaft. The elastic element can be designed as a spring plate or an elastic ring. In the spring plate, several evenly distributed limiting strips extend from the peripheral edge to the center, which are in close contact with the bearing and thus ensure stable axial support. In the elastic ring, this is pushed onto the outer peripheral wall of the bearing and provides axial support through its elastic deformation. The damping properties of the elastic element can absorb axial vibrations, reduce noise, and significantly improve the problem of disturbing noise caused by axial collisions.At the same time, the optimized bearing support structure and the arrangement position of the elastic element ensure stable axial support of the rotor shaft of the electric motor and increase the accuracy of the axial support.

[0014] The electric motor assembly allows for the material, structure, and mounting position of the elastic element and the bearing support structure to be customized according to specific operating requirements. The elastic element can be made of either metal or rubber. The metal elastic element is characterized by high strength and good elastic recovery, and can withstand high axial forces, making it suitable for precision applications. In contrast, the rubber elastic element is characterized by excellent flexibility and damping properties, and can effectively absorb axial vibration and reduce noise. The appropriate material for the elastic element can be selected according to the specific application situation and requirements.The lower end of the bearing can be inserted into the cover plate through hole of the rear cover plate, the limiting recess of the lower housing, or alternatively, the housing through hole of the stator housing. These different support options can be selected according to actual application scenarios and requirements to ensure the stability and durability of the bearing. The elastic element can be mounted inside the stator housing at a location close to the second end of the stator housing to ensure close contact between the elastic element and the bearing while avoiding environmental interference. Alternatively, the elastic element can be riveted to the stator housing, which can simplify the assembly process and increase structural stability.The mounting position of the elastic element can be limited by the gap or fitting relationship between the stator housing and the lower housing, which can simplify the design and reduce the cost. Short description of the characters

[0015] The present utility model is described in more detail below with reference to the drawings and specific embodiments. These show: Fig. 1 is a structural sectional view of an electric motor assembly for an air outlet actuator of a motor vehicle air conditioning system according to a first embodiment; Fig. 2 is a structural sectional view of an electric motor assembly for an air outlet actuator of a motor vehicle air conditioning system according to a second embodiment; Fig. 3 is a structural sectional view of an electric motor assembly for an air outlet actuator of a motor vehicle air conditioning system according to a third embodiment; Fig. 4 is a structural sectional view of an electric motor assembly for an air outlet actuator of a motor vehicle air conditioning system according to a fourth embodiment; Fig. 5 is a structural sectional view of an electric motor assembly for an air outlet actuator of a motor vehicle air conditioner according to a fifth embodiment; Fig. 6 is a schematic representation of the internal structure of an electric motor assembly for an air outlet actuator of a motor vehicle air conditioning system, Fig. 7 a schematic structural view of a spring plate.

[0016] Reference numerals in the above drawings: 1 - Upper casing; 1.1 - Rotating shaft recess; 2 - Lower casing; 2.1 - Limiting recess; 3 - Electric motor assembly; 3.1 - Stator casing; 3.1.1 - Casing through hole; 3.2 - Rotor rotating shaft; 3.3 - Bearing; 3.3.1 - Shaft shoulder; 3.4 - Spring plate; 3.4.1 - Limiting bar; 3.4.2 - Bearing fitting hole; 3.4.3 - Spring plate positioning portion; 3.5 - Back cover plate; 3.5.1 - Cover plate through hole; 3.6 - Elastic ring; 3.7 - Transmission gear; 4 - Gear transmission assembly. Detailed description of the embodiments

[0017] It is understood that in the present utility model, the terms "length", "width", "top", "bottom", "front", "back", "left", "right", "vertical", "horizontal", "topmost", "bottommost", "inside", "outside", "clockwise", "counterclockwise", "axial", "plane direction", "circumferential direction", etc., are used in relation to the directional or positional relationship shown in the respective drawing, in order merely to describe the utility model and, where appropriate, to simplify the description. In other words, these terms neither implicitly nor explicitly indicate the positioning, design, and operation of the device or element in question in a predetermined position, so that there is no limitation of the present utility model here. First embodiment

[0018] Fig. 1 and Fig. 7 show an electric motor assembly 3 for an air outlet actuator of a motor vehicle air conditioning system. The electric motor assembly 3 is arranged in a mounting cavity formed by an upper housing 1 and a lower housing 2 of the actuator. The electric motor assembly 3 comprises a stator assembly and a rotor assembly separable therefrom. The stator assembly comprises a first end and a second end of a stator housing 3.1. The rotor assembly comprises a rotor rotating shaft 3.2 arranged separably from the stator housing 3.1 along a Y-axis direction. A bearing 3.3 for support and an elastic element are provided at a location of the rotor rotating shaft 3.2 near the second end of the stator housing 3.1. The elastic element interacts with the bearing 3.3 and the second end of the stator housing 3.1, so that the elastic element continuously exerts an axial elastic force on the rotor rotating shaft 3.2 via the bearing 3.3.

[0019] The elastic element is a spring plate 3.4, in the center of which is provided a bearing fitting hole 3.4.2, which is enclosed by several spaced and evenly distributed limiting strips 3.4.1. A region of the spring plate 3.4 near the outer circumference is provided with an annular positioning section 3.4.3. A deformation-adaptive recess is provided between the limiting strips 3.4.1.

[0020] The spring plate 3.4 is arranged on an outer end surface of the second end of the stator housing 3.1. The upper end of the positioning portion 3.4.3 of the spring plate abuts the outer end surface of the second end of the stator housing 3.1. The lower end of the bearing 3.3 is inserted sequentially into a housing through hole 3.1.1 in the central region of the second end of the stator housing 3.1 and into the bearing fitting hole 3.4.2, so that the limiting strips 3.4.1 abut the outer peripheral wall of the bearing 3.3.

[0021] The outer end surface of the second end of the stator housing 3.1 is firmly connected to the positioning section 3.4.3 of the spring plate.

[0022] The elastic element is made of metal or rubber. Preferably, the spring plate 3.4 is made of metal.

[0023] The upper housing 1 is provided with a rotary shaft recess 1.1. The rotor rotary shaft 3.2 is rotatably connected directly to the rotary shaft recess 1.1 at a location near the first end of the stator housing 3.1.

[0024] The spring plate 3.4 is riveted onto the outer end surface of the second end of the stator housing 3.1, after which the stator housing 3.1 with the spring plate 3.4 is installed into the mounting cavity of the lower housing 2. The bearing 3.3 is mounted into the housing through-hole 3.1.1 of the stator housing 3.1, with one end portion of the bearing 3.3 abutting the limiting strips 3.4.1 so that the limiting strips 3.4.1 abut the outer peripheral wall of the bearing 3.3. The lower end of the rotor rotating shaft 3.2 is inserted into the stator housing 3.1 and rotatably connected to the stator housing 3.1 via the bearing 3.3, while the upper end of the rotor rotating shaft 3.2 is directly rotatably connected to the rotating shaft recess 1.1. Second embodiment

[0025] As can be seen from Fig. 2, the outer end face of the second end of the stator housing 3.1 and the spring plate 3.4 are detachably connected to one another, wherein the lower housing 2 and the outer end face of the second end of the stator housing 3.1 cooperate with one another to delimit the spring plate 3.4.

[0026] Other structures correspond to those in the first embodiment and therefore no further explanation is required.

[0027] First, the spring plate 3.4 and the stator housing 3.1 are sequentially installed into the mounting cavity, with the lower end of the spring plate 3.4 abutting the upper end of the lower housing 2, and the upper end of the spring plate 3.4 abutting the outer end surface of the second end of the stator housing 3.1 to limit the spring plate 3.4, while the lower end of the bearing 3.3 is inserted into the housing through hole 3.1.1 in the middle region of the second end of the stator housing 3.1, and at the same time, the end region of the bearing 3.3 abuts the limiting strips 3.4.1. The lower end of the rotor rotating shaft 3.2 is inserted into the stator housing 3.1 and rotatably connected to the stator housing 3.1 via the bearing 3.3, while the upper end of the rotor rotating shaft 3.2 is directly rotatably connected to the rotating shaft recess 1.1. Third embodiment

[0028] As in Fig. 3, the spring plate 3.4 is arranged on an inner end surface of the second end of the stator housing 3.1. The lower end of the bearing 3.3 is inserted sequentially into the housing through hole 3.1.1 in the central region of the second end of the stator housing 3.1 and into the bearing fitting hole 3.4.2, so that the lower end of a shaft shoulder 3.3.1 of the bearing 3.3 abuts the upper end surfaces of the limiting strips 3.4.1 and the limiting strips 3.4.1 abut the outer peripheral wall of the bearing 3.3.

[0029] The electric motor assembly 3 further comprises a back cover plate 3.5, which is arranged between the outer end surface of the second end of the stator housing 3.1 and the lower housing 2 of the actuator. The end of the bearing 3.3 is additionally inserted into a cover plate through-hole 3.5.1 in the central region of the back cover plate 3.5.

[0030] Other structures correspond to those in the first embodiment and therefore no further explanation is required.

[0031] The back cover plate 3.5 is mounted on the outer end surface of the second end of the stator housing 3.1, while the spring plate 3.4 is positioned on the inner end surface of the second end of the stator housing 3.1. The bearing 3.3 is mounted such that the lower end of the bearing 3.3 is inserted sequentially into the bearing fitting hole 3.4.2 and the cover plate through hole 3.5.1, whereby the lower end of the shaft shoulder 3.3.1 of the bearing 3.3 abuts the upper end surfaces of the limit bars 3.4.1, and the limit bars 3.4.1 abut the outer peripheral wall of the bearing 3.3. The lower end of the rotor rotating shaft 3.2 is inserted into the stator housing 3.1 and rotatably connected to the stator housing 3.1 via the bearing 3.3. The electric motor assembly 3 is mounted in the mounting cavity, with the upper end of the rotor rotating shaft 3.2 being directly rotatably connected to the rotating shaft recess 1.1. Fourth embodiment

[0032] As in Fig. 4, the spring plate 3.4 is arranged on an inner end surface of the second end of the stator housing 3.1. The lower end of the bearing 3.3 is inserted sequentially into the housing through hole 3.1.1 in the central region of the second end of the stator housing 3.1 and into the bearing fitting hole 3.4.2, so that the lower end of a shaft shoulder 3.3.1 of the bearing 3.3 abuts the upper end surfaces of the limiting strips 3.4.1 and the limiting strips 3.4.1 abut the outer peripheral wall of the bearing 3.3.

[0033] The lower housing 2 is provided with a limiting recess 2.1, which is assigned to the bearing 3.3, with the end of the bearing 3.3 additionally inserted into the limiting recess 2.1. Other structures correspond to those in the first embodiment and therefore require no further explanation.

[0034] The spring plate 3.4 is positioned on the inner end surface of the second end of the stator housing 3.1. The bearing 3.3 is mounted such that the lower end of the bearing 3.3 is inserted into the bearing fitting hole 3.4.2 of the spring plate 3.4, whereby the lower end of the shaft shoulder 3.3.1 of the bearing 3.3 abuts the upper end surfaces of the limit strips 3.4.1, and the limit strips 3.4.1 abut the outer peripheral wall of the bearing 3.3. The lower end of the rotor rotating shaft 3.2 is inserted into the stator housing 3.1 and rotatably connected to the stator housing 3.1 via the bearing 3.3. The electric motor assembly 3 is mounted in the mounting cavity, with the end of the bearing 3.3 additionally inserted into the limiting recess 2.1 and the upper end of the rotor rotating shaft 3.2 being directly rotatably connected to the rotating shaft recess 1.1. Fifth embodiment

[0035] As in Fig. 5, an electric motor assembly for an air outlet actuator of an automotive air conditioning system comprises an actuator and an electric motor assembly 3. The actuator comprises an upper housing 1 and a lower housing 2. The electric motor assembly 3 is arranged between the upper housing 1 and the lower housing 2. The electric motor assembly 3 comprises a stator housing 3.1, a rotor rotating shaft 3.2, and an elastic member. The stator housing 3.1 includes a first end and a second end of the stator housing 3.1. The rotor rotating shaft 3.2 is rotatably mounted in the stator housing 3.1. The rotor rotating shaft 3.2 is directly rotatably connected to the upper housing 1 at a location near the first end of the stator housing 3.1. At a location near the second end of the stator housing 3.1, the rotor rotating shaft 3.2 is provided with a bearing 3.3 supporting it, which includes a shaft shoulder 3.3.1.The elastic element is mounted near the second end of the stator housing 3.1. The inner side of the elastic element rests against the outer side of the bearing 3.3, so that the elastic element exerts an elastic force on the rotor rotating shaft 3.2 via the bearing 3.3.

[0036] The elastic element comprises an elastic ring 3.6 which is pushed onto the outer peripheral wall of the bearing 3.3 so that the upper end of the elastic ring 3.6 abuts the lower end of the shaft shoulder 3.3.1, the lower end of the elastic ring 3.6 abuts the stator housing 3.1 and the lower end of the bearing 3.3 is pushed into the housing through hole 3.1.1 in the central region of the second end of the stator housing 3.1.

[0037] The elastic element is made of metal or rubber. The elastic ring 3.6 is preferably made of rubber.

[0038] The upper housing 1 is provided with a rotary shaft recess 1.1. The rotor rotary shaft 3.2 is rotatably connected directly to the rotary shaft recess 1.1 at a location near the first end of the stator housing 3.1.

[0039] The elastic ring 3.6 is slid onto the outer peripheral wall of the bearing 3.3 so that the upper end of the elastic ring 3.6 rests against the lower end of the shaft shoulder 3.3.1. The lower end of the bearing 3.3 is inserted into the housing through-hole 3.1.1 in the central region of the second end of the stator housing 3.1. The lower end of the rotor rotating shaft 3.2 is rotatably connected to the stator housing 3.1 via the bearing 3.3. The rear cover plate 3.5 is connected to the outer end surface of the second end of the stator housing 3.1, while the upper end of the rotor rotating shaft 3.2 is directly rotatably connected to the rotating shaft recess 1.1.

[0040] As in Fig.6, the actuator further comprises a gear transmission assembly 4. The electric motor assembly 3 comprises a gear wheel 3.7 pushed onto the outer peripheral wall of the rotor rotating shaft 3.2, which cooperates with the gear transmission assembly 4 in a driving manner.

[0041] So far, the present utility model has been described by way of example with reference to the drawings. Obviously, the concrete implementation of the present utility model is not limited by the above description. Various minor improvements based on the technical solutions of the present utility model, or applications of the basic ideas and technical solutions of the present utility model without improvement directly to other scenarios, fall within the scope of protection of the present utility model.

Claims

[1] Electric motor assembly for an air outlet actuator of a motor vehicle air conditioning system, characterized by that it includes: an electric motor assembly disposed in a mounting cavity formed by an upper housing and a lower housing of the actuator, the electric motor assembly comprising a stator assembly and a rotor assembly separable therefrom; wherein the stator assembly comprises a first end and a second end of a stator housing; wherein the rotor assembly comprises a rotor rotating shaft arranged separably from the stator housing along a Y-axis direction; wherein a bearing for supporting and an elastic member are provided at a location of the rotor rotating shaft near the second end of the stator housing, the elastic member cooperating with the bearing and the second end of the stator housing so that the elastic member continuously exerts an elastic force along the Y-axis direction on the rotor rotating shaft via the bearing. [2] Electric motor assembly for an air outlet actuator of a motor vehicle air conditioning system according to claim 1, characterized by that the elastic element is a spring plate, in the center of which a bearing fitting hole is provided, which is enclosed by a plurality of spaced and evenly distributed limiting strips, wherein a region of the spring plate located near the outer circumference is provided with an annular positioning section. [3] Electric motor assembly for an air outlet actuator of a motor vehicle air conditioning system according to claim 2, characterized by that the spring plate is arranged on an outer end surface of the second end of the stator housing, wherein the positioning portion of the spring plate abuts the outer end surface of the second end of the stator housing, and wherein the bearing is inserted sequentially into a housing through hole in the central region of the second end of the stator housing and into the bearing fitting hole, so that the limiting strips abut the outer peripheral wall of the bearing. [4] Electric motor assembly for an air outlet actuator of a motor vehicle air conditioning system according to claim 3, characterized by that the outer end surface of the second end of the stator housing is firmly connected to the positioning portion of the spring plate. [5] Electric motor assembly for an air outlet actuator of a motor vehicle air conditioning system according to claim 3, characterized bythat the outer end surface of the second end of the stator housing and the positioning portion of the spring plate are connected to each other, wherein the lower housing and the outer end surface of the second end of the stator housing cooperate with each other to define the positioning portion of the spring plate. [6] Electric motor assembly for an air outlet actuator of a motor vehicle air conditioning system according to claim 2, characterized by that the spring plate is arranged on an inner end surface of the second end of the stator housing, wherein the lower end of the bearing is inserted in turn into the housing through hole in the central region of the second end of the stator housing and the bearing fitting hole, so that the lower end of a shaft shoulder of the bearing abuts the upper end surfaces of the limiting strips and the limiting strips abut the outer peripheral wall of the bearing. [7] Electric motor assembly for an air outlet actuator of a motor vehicle air conditioning system according to claim 6, characterized by that the electric motor assembly further comprises a back cover plate arranged between the outer end surface of the second end of the stator housing and the lower housing of the actuator, wherein the end of the bearing is additionally inserted into a cover plate through-hole in the central region of the back cover plate. [8] Electric motor assembly for an air outlet actuator of a motor vehicle air conditioning system according to claim 6, characterized by that the lower housing is provided with a limiting recess which is assigned to the bearing, the end of the bearing being additionally inserted into the limiting recess. [9] Electric motor assembly for an air outlet actuator of a motor vehicle air conditioning system according to claim 1, characterized bythat the elastic element comprises an elastic ring which is pushed onto the outer peripheral wall of the bearing so that the upper end of the elastic ring abuts the lower end of the shaft shoulder of the bearing, the lower end of the elastic ring abuts the stator housing and the lower end of the bearing is pushed into the housing through-hole in the central region of the second end of the stator housing. [10] Electric motor assembly for an air outlet actuator of a motor vehicle air conditioning system according to claim 1, characterized by that the elastic element is made of metal or rubber.

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