Automobile actuator
By providing a first support plate and reinforcement rib at the bottom of the lower housing of the automobile actuator and a buffer pad on the end surface of the motor, the problem of high noise of the existing automobile actuator is solved, and more stable and comfortable operation is achieved.
Patent Information
- Application Number
- CN202420099000.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-01-16
- Publication Date
- 2025-02-14
- Estimated Expiration
- 2034-01-16
AI Technical Summary
After working for a long time, due to the volatilization or splashing of grease, the friction between the gear and the plastic shell increases, and the noise increases. The rushing and collision of the motor when it rotates at high speed also increases noise, affecting users. Comfort in use.
An automobile actuator is designed, and the two first support plates are provided at the bottom of the lower housing to limit the axial ends of the motor, and reinforcement ribs are provided at the position of the first support plate close to the bottom of the lower housing to enhance the limit. Position stability; at the same time, buffer pads are installed between the upper and lower end surfaces of the motor, the bottom of the housing, to reduce abnormal noises when the motor and the housing are in contact.
By limiting the motor movement and providing buffering, the operating noise of the actuator is reduced, the noise and abnormal noise in the car are reduced, and the user's comfort is improved.
Smart Images
Figure CN222484472U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of automobile equipment control, in particular to an automobile actuator. Background Art
[0002] With the innovative development of the automobile industry, especially the rapid development of new energy, driverless and other technologies, automotive electronics has been widely used and has become an important part of the vehicle. Its performance directly affects the power, economy, reliability, safety and comfort of the vehicle.
[0003] In new energy vehicles, actuators are accessories and are one of the indispensable parts of modern automobiles. Actuators are a kind of miniature actuators that control the movement of valve cores. They are composed of a housing, a micro motor, a micro transmission unit, a PCB board, etc. After receiving the signal, the PCB of the actuator precisely controls the rotation of the output shaft to meet different functional requirements. It can be used in automotive air-conditioning dampers, automotive electronic water valves and other mechanisms.
[0004] With the continuous innovation and iteration of new energy vehicles, not only the driving performance needs to meet user needs, but users also have higher and higher requirements for the comfort of the car driving environment, resulting in increasingly stringent requirements for reducing the decibel value of the actuator working noise.
[0005] In existing actuators, when the gears of the transmission unit rotate, their end faces are generally in direct contact with the housing, and lubrication is achieved by grease. After working for a long time, the grease evaporates or splashes, causing increased friction between the gears and the plastic housing, and the noise also increases accordingly. In addition, when the motor rotates at high speed, axial and radial movement will occur. The collision between the motor and the housing will greatly increase the working noise of the actuator, and may also cause low-frequency resonance with the housing, seriously affecting the customer's comfort. Utility Model Content
[0006] The problem solved by the utility model is to overcome at least one defect in the prior art and provide an automobile actuator with stable operation and low noise, thereby improving user comfort.
[0007] To solve the above problems, the utility model provides an automobile actuator, comprising a lower shell and an upper shell, the lower shell is provided with a mounting cavity with an upper opening, a gear set and a motor for driving the gear set to operate are arranged in the mounting cavity, the upper shell is connected to the open end of the lower shell, two positioning bosses are symmetrically arranged on the outer shell of the motor, two first support plates are arranged at intervals at the bottom of the mounting cavity, the two axial ends of the motor are fitted between the two first support plates, and the top plates of the two first supports abut against the lower ends of the two positioning bosses, and the upper shell is pressed and limited at the upper end of the motor; first reinforcing ribs are arranged at the lower ends of the two first support plates and at least one side along the thickness direction thereof; buffer pads are arranged between the lower end face of the motor and the bottom wall of the mounting cavity and between the upper end face and the lower end face of the upper shell.
[0008] Compared with the prior art, the utility model has the following advantages:
[0009] In the automobile actuator structure of the utility model, two first support plates are arranged at the bottom of the lower shell to limit the axial ends of the motor. Due to the elasticity of the plastic itself, it can not only limit the movement of the motor, but also play a buffering role, thereby reducing the working noise of the actuator; at the same time, reinforcing ribs are arranged on the first support plate near the bottom of the lower shell to enhance the limiting stability; in addition, buffer pads are arranged between the upper and lower end surfaces of the motor and the upper shell and the bottom of the installation cavity to further reduce abnormal noise generated when the motor contacts the shell, reduce noise and abnormal noise in the car, and improve user comfort.
[0010] As an improvement, two second support plates corresponding to the first support plates are arranged on the lower end surface of the upper shell, the lower ends of the two second support plates are respectively pressed on the upper ends of the two positioning bosses, and the two second support plates are close to one end of the upper shell and are provided with second reinforcing ribs along at least one side of the thickness direction. In the above improved structure, the second support plate is arranged on the upper shell to further enhance the axial limit of the motor, while ensuring the stable vertical positioning of the motor and reducing vibration noise.
[0011] In a further improvement, both positioning bosses are cylindrical structures, and arc grooves matching the shape of the positioning bosses are provided on the upper ends of the two first support plates and the lower end surfaces of the two second support plates. In the above improved structure, the cylindrical positioning bosses and the arc groove structure matched therewith effectively improve the stability of the motor after positioning at both ends, and reduce or even eliminate vibration noise.
[0012] In a further improvement, a positioning seat is provided at the bottom of the installation cavity, a positioning groove is provided on the upper end surface of the positioning seat, and arc surfaces matching the shape of the motor are provided on the two inner side walls in the width direction of the positioning groove. In the above improved structure, the positioning groove and the arc surface structure further ensure the stability of the motor after assembly, and can stably limit the position in both the vertical and horizontal directions.
[0013] In a further improvement, the bottom wall of the mounting cavity is provided with a plurality of mounting parts for respectively rotating and cooperating with the plurality of gear shafts of the gear set, and the top of each mounting part is provided with an oil storage tank for storing grease. In the above improved structure, the oil storage tank is added, and after being filled with grease, sufficient grease can be provided for a long time, thereby reducing the decibel value of the noise of the actuator in the later stage.
[0014] Preferably, each gear of the gear set is made of plastic material. In this structure, the gears made of plastic material can avoid meshing noise between metal parts to the greatest extent, and are light in weight, which conforms to the trend of lightweight development.
[0015] In a further improvement, a worm is mounted on the output shaft of the motor, and the worm is in driving connection with the gear set; a support platform is provided at the bottom of the mounting cavity, and a positioning groove is provided on the upper end surface of the support platform, and the free end of the output shaft is fitted into the positioning groove. In the above improved structure, the support platform supports the free end of the motor output shaft and can also limit its radial position to prevent the free end of the output shaft from radially swinging, thereby avoiding friction noise between the worm and the turbine.
[0016] In a further improvement, the outer periphery of the lower end surface of the upper shell is provided with an annular positioning slot, the top of the open end of the lower shell is provided with an annular positioning plug plate, the positioning plug plate is inserted and fitted in the positioning slot, and the upper shell and the lower shell are fixed together by laser hot-melt welding. In the above improved structure, the upper shell and the lower shell are fixed by hot-melt welding, eliminating the fastener structure, preventing the noise generated by the loose fasteners in the later stage, and at the same time better ensuring the sealing performance in the installation cavity.
[0017] Other improved features and advantages of the utility model will be described in the subsequent specific embodiments, and partly become apparent from the description, or understood by implementing the utility model. The purpose and other advantages of the utility model can be achieved and obtained through the structures specifically pointed out in the description and the drawings. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] Figure 1 A three-dimensional diagram of the automobile actuator of the utility model;
[0019] Figure 2This is an exploded structural diagram of the automobile actuator of the utility model;
[0020] Figure 3 This is an exploded structural diagram of the automobile actuator of the utility model from another angle;
[0021] Figure 4 It is a structural diagram of the lower housing in the utility model;
[0022] Figure 5 This is another angle structural diagram of the lower shell in the utility model.
[0023] Description of reference numerals:
[0024] 1. Lower shell; 2. Upper shell; 3. Mounting cavity; 4. Gear set; 5. Motor; 6. Positioning boss; 7. First support plate; 8. First reinforcing rib; 9. Buffer pad; 10. Second support plate; 11. Second reinforcing rib; 12. Arc groove; 13. Positioning seat; 14. Positioning groove; 15. Arc surface; 16. Mounting part; 17. Oil storage tank; 18. Worm; 19. Support platform; 20. Positioning groove; 21. Positioning slot; 22. Positioning plug plate; 23. PCB board; 24. Spline matching hole; 25. Limiting boss; 26. Mounting column; 27. Mounting hole; 28. Input gear; 29. Intermediate gear; 30. Output gear. DETAILED DESCRIPTION
[0025] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and understandable, the specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.
[0026] In the description of the present invention, it should be noted that the orientations or positional relationships indicated by terms such as "upper end", "lower end", "inner side wall", "top" and "bottom" are based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present invention.
[0027] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the term "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0028] like Figures 1 to 5As shown, the utility model provides an automobile actuator, including a lower shell 1 and an upper shell 2, the lower shell 1 is provided with a mounting cavity 3 with an upper opening, a gear set 4 and a motor 5 for driving the gear set 4 to operate are arranged in the mounting cavity 3; specifically, a worm 18 for driving the gear set 4 to operate is connected to the output shaft of the motor 5, and in addition, in this structure, the worm 18 and the output shaft are processed separately and are later connected to form an integrated structure, that is, the worm 18 is sleeved on the outside of the output shaft, and the free end of the output shaft passes through the worm 18, and the free end of the output and the motor 5 housing are respectively connected to the inner wall of the mounting cavity 3; more specifically, a first mounting portion 16 for mounting the motor 5 and a second mounting portion 16 for positioning the free end of the output shaft are arranged at intervals at the bottom of the mounting cavity 3.
[0029] like Figure 4 As shown, the first mounting portion 16 includes two first support plates 7 arranged at intervals, and two positioning bosses 6 are symmetrically arranged on the outer shell of the motor 5, and the specific two positioning bosses 6 are formed at the two axial ends of the outer shell of the motor 5; the two axial ends of the motor 5 are limited between the two first support plates 7, and the top plates of the two first supports are abutted against the lower ends of the two positioning bosses 6, and the upper shell 2 is pressed and limited at the upper end of the motor 5; the first reinforcing ribs 8 are arranged at the lower ends of the two first support plates 7 and on at least one side along the thickness direction thereof; preferably, the first reinforcing ribs 8 are integrally formed at the lower ends of the two first support plates 7 and on both sides along the thickness direction thereof.
[0030] In this embodiment, since the upper shell 2, the lower shell 1 and the first support plate 7 are all made of plastic, the plastic itself is elastic, which can not only limit the axial movement of the motor 5, but also play a buffering role, thereby reducing the working noise of the actuator; on the other hand, a buffer pad 9 is provided between the lower end face of the motor 5 and the bottom wall of the mounting cavity 3, and between the upper end face and the lower end face of the upper shell 2. Preferably, the buffer pad 9 is a seismic isolation sponge. The seismic isolation material is attached to the surface of the motor 5 shell to reduce the abnormal sound generated when the motor 5 contacts the shell, thereby avoiding the actuator from generating abnormal sound of fixed frequency, so that the motor 5 can work smoothly.
[0031] like Figure 5 As shown, the second mounting portion 16 is a mounting vertical plate close to the free end of the output shaft of the motor 5, and a supporting platform 19 is provided on the side of the mounting vertical plate close to the output shaft. The upper end surface of the supporting platform 19 is provided with a positioning groove 20 for accommodating the free end of the output shaft. This structure is used to vertically support the output shaft and to radially position it to prevent the free end of the output shaft from radially swinging, thereby avoiding friction noise between the worm 18 and the turbine.
[0032] In addition, in this embodiment, if Figure 3As shown, two second support plates 10 corresponding to the first support plates 7 are arranged on the lower end surface of the upper shell 2. The two second support plates 10 are also limited and matched at the two ends of the axial direction of the motor 5, and the lower ends of the two second support plates 10 are respectively pressed on the upper ends of the two positioning bosses 6, that is, the two positioning bosses 6 at the two ends of the motor 5 are respectively positioned between the two first support plates 7 and the two second support plates 10, which has a simple structure, convenient installation, and can also achieve axial limitation of the motor 5, and has an elastic buffering effect; the second support plate 10 is close to one end of the upper shell 2 and is provided with a second reinforcing rib 11 along at least one side of the thickness direction thereof to ensure the structural strength of the second support plate 10. Preferably, reinforcing ribs are integrally formed at both ends of the second support plate 10 in the thickness direction.
[0033] In the above structure, the two positioning bosses 6 are both cylindrical structures, and the upper ends of the two first support plates 7 and the lower end surfaces of the two second support plates 10 are provided with arc grooves 12 matching the shape of the positioning bosses 6, so as to better ensure the stability of the motor 5 after connection.
[0034] like Figure 4 As shown, a positioning seat 13 is provided at the bottom of the installation cavity 3, and a positioning groove 14 for supporting the motor 5 is provided on the upper end surface of the positioning seat 13, and arc surfaces 15 matching the outer shape of the motor 5 are provided on the two inner side walls in the width direction of the positioning groove 14 to achieve positioning of the motor 5 in the width direction; in addition, in this structure, the two first support plates 7 are connected to the two ends of the positioning seat 13 in the length direction, specifically, the two first support plates 7 are directly injection molded with the positioning seat 13 and the lower shell 1 at one time, eliminating the subsequent connection steps and reducing costs.
[0035] like Figure 4 As shown, a plurality of mounting portions 16 for rotationally cooperating with a plurality of gear shafts of the gear set 4 are disposed on the bottom wall of the mounting cavity 3, and an oil storage tank 17 for storing grease is disposed on the top of each mounting portion 16.
[0036] Specifically, Figure 2As shown, in this embodiment, the gear set 4 includes an input gear 28, an intermediate gear 29 and an output gear 30, wherein the input end of the input gear 28 meshes with the worm 18, the output end of the input gear 28 meshes with the input end of the intermediate gear 29, the output end of the intermediate gear 29 meshes with the input end of the output gear 30, and the output end of the output gear 30 is a spline matching hole 24; wherein a avoidance through hole is opened at a position corresponding to the spline matching hole 24 on the upper shell 2, an outwardly convex and annular limiting boss 25 is arranged on the bottom wall of the mounting cavity 3, the lower end of the output gear 30 is rotatably matched on the limiting boss 25, and an oil storage tank 17 is opened on the top of the limiting boss 25 for storing grease; in addition, a mounting column 26 for rotatably matching the lower end of the intermediate tooth and a mounting hole 27 for rotatably matching the lower end of the input tooth are respectively arranged on the bottom wall of the mounting cavity 3, and similarly, an oil storage tank 17 for storing grease starts from the top of the mounting column 26.
[0037] In addition, the motor 5 involved in this embodiment is preferably a stepper motor 5. The stepper motor 5 can realize stepless speed regulation and arbitrary angle control, and adopts communication control, which is conducive to realizing automobile information sharing.
[0038] like Figure 3 As shown, a PCB board 23 is also provided on the lower end surface of the upper shell 2, and the PCB board 23 is electrically connected to the motor 5 via a pin assembly, which can save internal space.
[0039] In this embodiment, each gear of the gear set 4 is made of plastic material, which can not only reduce friction noise, but also reduce weight, which is more in line with the lightweight development trend of new energy vehicles.
[0040] like Figure 3 , 5 As shown, the outer periphery of the lower end surface of the upper shell 2 is provided with an annular positioning slot 21, and the top of the open end of the lower shell 1 is provided with an annular positioning plug plate 22, the positioning plug plate 22 is inserted and matched in the positioning slot 21, and the upper shell 2 and the lower shell 1 are fixed together by laser hot-melt welding. The hot-melt welding method is used for fastening and connection, which has a simple structure, high connection strength, and can effectively achieve the functions of dustproof and waterproof, improve the sealing performance, and enhance the protection strength.
[0041] Although the utility model is disclosed as above, the protection scope of the utility model is not limited thereto. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of the utility model, and these changes and modifications will fall within the protection scope of the utility model.
Claims
1. An automobile actuator, comprising a lower housing (1) and an upper housing (2), wherein the lower housing (1) is provided with a mounting cavity (3) with an upper opening, wherein a gear set (4) and a motor (5) for driving the gear set (4) are arranged in the mounting cavity (3), and wherein the upper housing (2) is connected to the open end of the lower housing (1), and wherein: Two positioning bosses (6) are symmetrically arranged on the outer shell of the motor (5), and two first support plates (7) are arranged at intervals at the bottom of the installation cavity (3). The two axial ends of the motor (5) are fitted between the two first support plates (7), and the top plates of the two first supports are abutted against the lower ends of the two positioning bosses (6). The upper shell (2) is pressed and limited at the upper end of the motor (5); first reinforcing ribs (8) are arranged at the lower ends of the two first support plates (7) and along at least one side of the thickness direction thereof; and buffer pads (9) are arranged between the lower end surface of the motor (5) and the bottom wall of the installation cavity (3) and between the upper end surface and the lower end surface of the upper shell (2).
2. The automotive actuator according to claim 1, characterized in that: Two second support plates (10) corresponding to the first support plates (7) are arranged on the lower end surface of the upper shell (2); the lower ends of the two second support plates (10) are respectively pressed onto the upper ends of the two positioning bosses (6); and the two second support plates (10) are provided with second reinforcing ribs (11) near one end of the upper shell (2) and along at least one side in the thickness direction thereof.
3. The automotive actuator according to claim 2, characterized in that: The two positioning bosses (6) are both cylindrical structures, and arc-shaped grooves (12) matching the shapes of the positioning bosses (6) are provided on the upper ends of the two first support plates (7) and on the lower end surfaces of the two second support plates (10).
4. The automotive actuator according to claim 2, characterized in that: A positioning seat (13) is provided at the bottom of the installation cavity (3), a positioning groove (14) is provided on the upper end surface of the positioning seat (13), and arc surfaces (15) matching the outer shape of the motor (5) are provided on two inner side walls in the width direction of the positioning groove (14).
5. The automotive actuator according to claim 1, characterized in that: A plurality of mounting portions (16) for respectively rotating and cooperating with a plurality of gear shafts of the gear set (4) are arranged on the bottom wall of the mounting cavity (3), and an oil storage tank (17) for storing grease is arranged on the top of each mounting portion (16).
6. The automotive actuator according to claim 1, characterized in that: Each gear of the gear set (4) is made of plastic material.
7. The automotive actuator according to claim 1, characterized in that: A worm (18) is mounted on the output shaft of the motor (5), and the worm (18) is drivingly connected to the gear set (4); a support platform (19) is provided at the bottom of the mounting cavity (3), and a positioning groove (20) is provided on the upper end surface of the support platform (19), and the free end of the output shaft is mounted in the positioning groove (20).
8. The automotive actuator according to any one of claims 1 to 7, characterized in that: An annular positioning slot (21) is provided on the outer periphery of the lower end surface of the upper shell (2), and an annular positioning plug plate (22) is provided on the top of the open end of the lower shell (1); the positioning plug plate (22) is inserted and fitted into the positioning slot (21), and the upper shell (2) and the lower shell (1) are fixed together by laser hot-melt welding.