Motor assembly and automobile air conditioner air outlet actuator thereof

Abstract

The utility model discloses a motor assembly. Comprising a first end and a second end of a motor shell, a rotor rotating shaft rotatably mounted in the motor shell, a sheet-shaped elastic piece fixed at the first end of the motor shell and matched with the first end of the motor shell in shape, and a rear cover plate arranged at the outer end of the sheet-shaped elastic piece and fixed with the motor shell and the sheet-shaped elastic piece into a whole, a first shaft sleeve is installed at the position, close to the first end of the motor shell, of the rotor rotating shaft, a second shaft sleeve is installed at the other end of the rotor rotating shaft, and the sheet-shaped elastic piece comprises a center installation hole used for being matched with the first shaft sleeve and a plurality of slits evenly extending outwards along the edge of the center installation hole. The sheet-shaped elastic piece applies elastic force to the rotor rotating shaft through the first shaft sleeve, and the tail end of the first shaft sleeve is installed in a through hole in the middle of the rear cover plate. According to the utility model, the sheet-shaped elastic member is provided with a plurality of slits in an extending manner, so that the deformation of the sheet-shaped elastic member is increased, the sheet-shaped elastic member is greatly deformed under the action of a small external force, and the movement stability of the rotor rotating shaft is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of machinery and transmission, and particularly relates to an electric motor assembly and an automotive air-conditioning air outlet actuator thereof. Background Art

[0002] With the innovative development of the automotive industry, especially the rapid development of technologies such as new energy and driverless, automotive electronics has been widely applied on a large scale and has become an important part of the whole vehicle. Its performance directly affects the power performance, economy, reliability, safety, and comfort of the vehicle. The working principle of an automotive air-conditioning air outlet actuator is as follows: after the micro-motor is powered on, it rotates at a high speed, is decelerated by a gear train, and finally the output gear outputs with a certain torque and rotational speed, and then the relevant air door is pushed by a connecting rod to realize the switching and angle conversion functions of the automotive air-conditioning air door.

[0003] In the prior art, noise will occur during the use of the air door actuator. At present, one reason for the noise generated by the air door actuator is that the shrapnel structure contained in the original design stepper motor only has a hole in the middle to facilitate the lower bearing to easily press the shrapnel to make it elastically deformed. However, it is found in actual use that the deformable amount of the shrapnel is small, and when the rotor is pressed, the stability and reliability of the pressure need to be improved. Summary of the Invention

[0004] By providing an electric motor assembly and an automotive air-conditioning air outlet actuator thereof in an embodiment of the present application, a plurality of slits are uniformly extended outward along the edge of the central mounting hole, so that the deformable amount of the sheet-shaped elastic member is increased, so that the sheet-shaped elastic member can generate a large deformation under the action of a small external force, and the stability of the rotor shaft during movement is improved.

[0005] To achieve the above object, the utility model provides the following technical solution: An electric motor assembly, comprising

[0006] A motor housing, including a first end and a second end of the motor housing;

[0007] A rotor shaft rotatably installed in the motor housing; a first bushing is supported and installed at a position where the rotor shaft is close to the first end of the motor housing, and a second bushing is supported and installed at the other end of the rotor shaft;

[0008] A sheet-shaped elastic member fixed to the first end of the motor housing and adapted to the shape of the first end of the motor housing. The sheet-shaped elastic member includes a central mounting hole for cooperating with the first bushing and a plurality of slits uniformly extended outward along the edge of the central mounting hole, and the slits do not penetrate radially. The sheet-shaped elastic member applies an elastic force to the rotor shaft through the first bushing;

[0009] The rear cover is arranged at the first end of the motor housing and the outer end of the sheet elastic member, and is fixed to the motor housing and the sheet elastic member as a whole. The tail end of the first shaft sleeve is sleeved and installed in the through hole in the middle of the rear cover.

[0010] Compared with the prior art, the advantages of the utility model are:

[0011] This solution re-optimizes the specific structure of the sheet elastic member. The sheet elastic member is arranged between the first end of the motor housing and the rear cover plate. The sheet elastic member is connected with the first sleeve through the central mounting hole, so that the sheet elastic member applies elastic force to the rotor shaft. At the same time, the sheet elastic member has a plurality of slits extending outward evenly along the edge of the central mounting hole, so that the sheet elastic member can produce a large deformation under the action of a small external force. The sheet elastic member provides an enhanced axial upward support force. One end of the rotor shaft is rotatably connected to the first sleeve, so that the axial support provided to the rotor shaft is enhanced through the first sleeve, so that the rotor shaft is strongly supported under no-load and no-power conditions, and the stability of the rotor shaft during movement is improved, thereby optimizing the abnormal noise problem of the motor assembly as a whole.

[0012] When the motor assembly is replaced, the length of the rotor shaft is adjusted, thereby changing the position of the first sleeve. While the position of the sheet elastic member remains unchanged, the force between the first sleeve and the sheet elastic member changes, thereby being able to adjust different pre-pressures, which can be subsequently applied to motor assemblies of different sizes and structures.

[0013] As an improvement, a plurality of mounting positioning protrusions are evenly distributed along the circumferential direction at the first end of the motor housing, and a plurality of spring piece mounting positioning holes are provided on the sheet-like elastic member corresponding to the mounting positioning protrusions, and the spring piece mounting positioning holes are placed near the end of the slit and staggered with the slit. The mounting positioning protrusions cooperate with the spring piece mounting positioning holes, thereby positioning the installation of the sheet-like elastic member, and at the same time limiting the sheet-like elastic member to prevent the sheet-like elastic member from deflecting.

[0014] As an improvement, a plurality of rear cover installation positioning holes are provided on the rear cover plate, and the rear cover installation positioning holes are arranged correspondingly to the installation positioning protrusions and the spring piece installation positioning holes, thereby playing a positioning role in the installation of the rear cover plate.

[0015] As an improvement, the first sleeve and the second sleeve both include a supporting hole, a supporting portion and a limiting portion for matching with the rotor shaft, and the diameter of the limiting portion is larger than that of the supporting portion, so as to achieve a better limiting effect.

[0016] As an improvement, the central mounting hole of the sheet-like elastic member is sleeved and mounted on the outer periphery of the supporting portion of the first sleeve and abuts against the limiting portion of the first sleeve, thereby realizing elastic support of the first sleeve by the sheet-like elastic member.

[0017] As an improvement, the motor assembly further includes a worm and a worm bracket. The worm is fixed to the output end of the rotor shaft, and the large end of the worm bracket is fixed to the second end of the motor housing. The small end of the worm bracket is sleeved and installed on the outer periphery of the supporting portion of the second bushing and is limited by the limiting portion of the second bushing, thereby improving the stability of the worm during rotation.

[0018] As an improvement, the sheet-shaped elastic member is circular, and the length of the slit accounts for 2 / 3 of the radius of the sheet-shaped elastic member. The width of the slit is 0.3 - 0.5 mm. The length of the slit accounting for 2 / 3 of the radius of the sheet-shaped elastic member ensures that under the action of an external force, the deformation of the sheet-shaped elastic member is controllable, neither being damaged due to excessive deformation nor being unable to meet the usage requirements due to too small deformation. The width of the slit is between 0.3 - 0.5 mm, and the selection of this width range helps to maintain the stability of the sheet-shaped elastic member during long-term use.

[0019] An automotive air-conditioning outlet actuator adopts the above-mentioned motor assembly. The automotive air-conditioning outlet actuator includes a gear transmission assembly. The worm of the motor assembly is in transmission cooperation with the gear transmission assembly. The gear transmission assembly meshes with the worm. By rotating the rotor shaft, the worm coaxially arranged with the rotor shaft rotates, and the worm meshes with the gear transmission assembly to output the power of the stepper motor outward through the worm wheel. Brief Description of the Drawings

[0020] The following further describes the present invention in detail with reference to the drawings and specific embodiments:

[0021] Figure 1 It is a schematic cross-sectional structure diagram of the motor assembly;

[0022] Figure 2 It is a schematic structure diagram of the sheet-shaped elastic member;

[0023] Figure 3 It is an exploded view of the structure of the motor assembly;

[0024] Figure 4 It is an exploded view of the structure of the motor assembly;

[0025] Figure 5 It is a schematic internal structure diagram of the automotive air-conditioning outlet actuator.

[0026] The markings in the above figures are respectively: 1. Motor assembly; 1.1 Motor housing; 1.1.1 Mounting and positioning bump; 1.2 Rotor shaft; 1.3 First bushing; 1.3.1 First support hole; 1.3.2 First support portion; 1.3.3 First limiting portion; 1.4 Second bushing; 1.4.1 Second support hole; 1.4.2 Second support portion; 1.4.3 Second limiting portion; 1.5 Sheet-shaped elastic member; 1.5.1 Central mounting hole; 1.5.2 Slit; 1.5.3 Elastic sheet mounting and positioning hole; 1.6 Rear cover plate; 1.6.1 Rear cover mounting and positioning hole; 1.7 Worm; 1.8 Worm bracket; 2. Automotive air-conditioning outlet actuator; 2.1 Gear transmission assembly. Detailed implementation mode

[0027] In the present utility model, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial direction", "plane direction", "circumferential direction", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be construed as a limitation to the present utility model.

[0028] As Figures 1 to 2 As shown, a motor assembly 1 includes a motor housing 1.1, a rotor shaft 1.2, a sheet-shaped elastic member 1.5, and a rear cover plate 1.6. The motor housing 1.1 includes a first end and a second end of the motor housing 1.1. The rotor shaft 1.2 is rotatably installed in the motor housing 1.1. A first bushing 1.3 is supported and installed at the rotor shaft 1.2 near the first end of the motor housing 1.1. The other end of the rotor shaft 1.2 is supported and installed with a second bushing 1.4. The sheet-shaped elastic member 1.5 is fixed to the first end of the motor housing 1.1 and is adapted to the shape of the first end of the motor housing 1.1. The sheet-shaped elastic member 1.5 includes a central mounting hole 1.5.1 for cooperating with the first bushing 1.3 and a plurality of slits 1.5.2 extending uniformly outward along the edge of the central mounting hole 1.5.1, and the slits 1.5.2 do not penetrate radially. The sheet-shaped elastic member 1.5 applies an elastic force to the rotor shaft 1.2 through the first bushing 1.3. The rear cover plate 1.6 is arranged at the first end of the motor housing 1.1 and the outer end of the sheet-shaped elastic member 1.5 and is fixed integrally with the motor housing 1.1 and the sheet-shaped elastic member 1.5. The tail end of the first bushing 1.3 is sleeved and installed in the through hole in the middle of the rear cover plate 1.6.

[0029] As Figure 1As shown, the first sleeve 1.3 includes a first supporting hole 1.3.1, a first supporting portion 1.3.2 and a first limiting portion 1.3.3 for matching with one end of the rotor shaft 1.2, and the diameter of the first limiting portion 1.3.3 is larger than the first supporting portion 1.3.2. The central mounting hole 1.5.1 of the sheet-like elastic member 1.5 is sleeved and installed on the outer periphery of the first supporting portion 1.3.2 and abuts against the limiting portion of the first sleeve 1.3. The first supporting portion 1.3.2 is sleeved and installed in the through hole in the middle of the rear cover plate 1.6 so that the sheet-like elastic member 1.5 applies elastic force to the rotor shaft 1.2 through the first sleeve 1.3.

[0030] The second sleeve 1.4 includes a second supporting hole 1.4.1, a second supporting portion 1.4.2 and a second limiting portion 1.4.3 for matching with the other end of the rotor shaft 1.2, and the diameter of the second limiting portion 1.4.3 is larger than that of the second supporting portion 1.4.2. The motor assembly 1 also includes a worm 1.7 and a worm bracket 1.8. The worm 1.7 is fixed to the output end of the rotor shaft 1.2, and the large end of the worm bracket 1.8 is fixed to the second end of the motor housing 1.1, and the small end of the worm bracket 1.8 is sleeved and installed on the outer periphery of the second supporting portion 1.4.2 and is limited by the second limiting portion 1.4.3.

[0031] like Figures 3 to 4 As shown, the first end of the motor housing 1.1 is evenly distributed with a plurality of mounting positioning protrusions 1.1.1 along the circumferential direction, and the sheet-like elastic member 1.5 is provided with a plurality of spring-clip mounting positioning holes 1.5.3 corresponding to the mounting positioning protrusions 1.1.1. The spring-clip mounting positioning holes 1.5.3 are placed near the end of the slit 1.5.2 and staggered with the slit 1.5.2. The rear cover plate 1.6 is provided with a plurality of rear cover mounting positioning holes 1.6.1, and the rear cover mounting positioning holes 1.6.1 are arranged corresponding to the mounting positioning protrusions 1.1.1 and the spring-clip mounting positioning holes 1.5.3.

[0032] The sheet-like elastic member 1.5 is circular, and the length of the slit 1.5.2 accounts for 2 / 3 of the radius of the sheet-like elastic member 1.5, and the width of the slit 1.5.2 is 0.3-0.5 mm.

[0033] The central mounting hole 1.5.1 of the sheet-shaped elastic member 1.5 is sleeved and mounted on the outer periphery of the first supporting portion 1.3.2, so that the upper end surface of the sheet-shaped elastic member 1.5 near the center of the circle abuts against the lower end surface of the first limiting portion 1.3.3. The first supporting portion 1.3.2 is sleeved and mounted in the through hole in the middle of the rear cover plate 1.6, so that the lower circumferential surface of the sheet-shaped elastic member 1.5 far from the center of the circle abuts against the upper end surface of the rear cover plate 1.6. At the same time, the rear cover mounting positioning hole 1.6.1 is aligned with the elastic sheet mounting positioning hole 1.5.3. The rotor rotating shaft 1.2 is rotatably mounted in the motor housing 1.1. The rotor rotating shaft 1.2 near the first end of the motor housing 1.1 is inserted into the interior of the first supporting hole 1.3.1. At the same time, a plurality of mounting positioning bumps 1.1.1 at the first end of the motor housing 1.1 pass through the elastic sheet mounting positioning hole 1.5.3 and the rear cover mounting positioning hole 1.6.1, so that the motor housing 1.1, the rear cover plate 1.6 and the sheet-shaped elastic member 1.5 are fixed as a whole. The worm 1.7 is fixed to the output end of the rotor rotating shaft 1.2. The other end of the rotor rotating shaft 1.2 is inserted into the interior of the second supporting hole 1.4.1. The large end of the worm support 1.8 is fixed to the second end of the motor housing 1.1. The small end of the worm support 1.8 is sleeved and mounted on the outer periphery of the second supporting portion 1.4.2 and is limited by the second limiting portion 1.4.3.

[0034] The central mounting hole 1.5.1 of the sheet-shaped elastic member 1.5 is sleeved and mounted on the outer periphery of the first supporting portion 1.3.2 and abuts against the lower end surface of the first limiting portion 1.3.3. And a plurality of slits 1.5.2 are uniformly distributed and extended outward along the edge of the central mounting hole 1.5.1 of the sheet-shaped elastic member 1.5. The slits 1.5.2 do not penetrate radially, so that the deformable amount of the sheet-shaped elastic member 1.5 is increased. Thus, under the action of a relatively small external force, the sheet-shaped elastic member 1.5 can generate a relatively large deformation. The sheet-shaped elastic member 1.5 provides an axially upward supporting force for the first limiting portion 1.3.3. The lower end of the rotor rotating shaft 1.2 is rotatably connected to the first supporting hole 1.3.1, so as to provide axial support for the rotor rotating shaft 1.2, so that the rotor rotating shaft 1.2 can be strongly supported when there is no load and no power on. When applied to the motor assembly 1 with different sizes and different structures, by adjusting the length of the rotor rotating shaft 1.2, the position of the first shaft sleeve 1.3 is adjusted. When the position of the sheet-shaped elastic member 1.5 remains unchanged, the acting force between the first limiting portion 1.3.3 and the sheet-shaped elastic member 1.5 changes, so that different pre-pressures can be adjusted.

[0035] As Figure 5 shown, the automotive air-conditioning outlet actuator 2 includes a gear transmission assembly 2.1. The worm 1.7 of the motor assembly 1 is in transmission cooperation with the gear transmission assembly 2.1.

[0036] The above is an exemplary description of the utility model in conjunction with the accompanying drawings. It is obvious that the specific implementation of the utility model is not limited to the above-mentioned method. As long as various non-substantial improvements are made using the technical solution of the utility model, or the concept and technical solution of the utility model are directly applied to other occasions without improvement, they are all within the protection scope of the utility model.

Claims

1. A motor assembly, characterized in that: include A motor housing, comprising a first end and a second end of the motor housing; A rotor shaft is rotatably mounted in the motor housing, wherein a first sleeve is supported and mounted on a first end of the rotor shaft near the motor housing, and a second sleeve is supported and mounted on the other end of the rotor shaft; A sheet-like elastic member is fixed to the first end of the motor housing and is adapted to the shape of the first end of the motor housing. The sheet-like elastic member includes a central mounting hole for matching with the first sleeve and a plurality of slits extending outwardly uniformly along the edge of the central mounting hole, and the slits are non-radially penetrating. The sheet-like elastic member applies elastic force to the rotor shaft through the first sleeve; The rear cover is arranged at the first end of the motor housing and the outer end of the sheet elastic member, and is fixed to the motor housing and the sheet elastic member as a whole. The tail end of the first shaft sleeve is sleeved and installed in the through hole in the middle of the rear cover.

2. A motor assembly according to claim 1, characterized in that: The first end of the motor housing is evenly distributed with a plurality of mounting and positioning protrusions along the circumferential direction, and the sheet-like elastic member is provided with a plurality of spring piece mounting and positioning holes corresponding to the mounting and positioning protrusions. The spring piece mounting and positioning holes are placed near the end of the slit and staggered with the slit.

3. A motor assembly according to claim 2, characterized in that: The rear cover plate is provided with a plurality of rear cover mounting positioning holes, and the rear cover mounting positioning holes are arranged correspondingly to the mounting positioning protrusions and the spring piece mounting positioning holes.

4. A motor assembly according to claim 1, characterized in that: The first sleeve and the second sleeve both include a supporting hole, a supporting portion and a limiting portion for matching with the rotor shaft, and the diameter of the limiting portion is larger than the supporting portion.

5. A motor assembly according to claim 4, characterized in that: The central mounting hole of the sheet-like elastic member is sleeved and mounted on the outer periphery of the supporting portion of the first shaft sleeve and abuts against the limiting portion of the first shaft sleeve.

6. The motor assembly according to claim 1, characterized in that: The motor assembly also includes a worm and a worm bracket, the worm is fixed to the output end of the rotor shaft, and the large end of the worm bracket is fixed to the second end of the motor housing, and the small end of the worm bracket is sleeved and installed on the outer periphery of the supporting part of the second sleeve and limited by the limiting part of the second sleeve.

7. The motor assembly according to claim 1, characterized in that: The sheet-like elastic member is circular, the length of the slit is 2 / 3 of the radius of the sheet-like elastic member, and the width of the slit is 0.3-0.5 mm.

8. An automotive air-conditioning outlet actuator, characterized in that: The automobile air-conditioning air outlet actuator adopts the motor assembly as described in any one of claims 1 to 7, and the automobile air-conditioning air outlet actuator includes a gear transmission assembly, and the worm of the motor assembly is in transmission cooperation with the gear transmission assembly.

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