Electric actuator and vehicle

Abstract

The utility model discloses an electric actuator and car, including the casing, drive motor, screw rod and push rod. Drive motor is housed in the casing, and drive screw rod rotation. Push rod is equipped with internal thread and is engaged with the external thread of screw rod. Through the rotation -stopping structure of setting between push rod and casing, the circumferential rotation of push rod is restricted, makes it only can carry out axial linear motion under the drive of screw rod to realize the extension or retraction. The utility model discloses compact structure, and transmission efficiency is high, and through the sealing structure on the casing has good dustproof waterproof performance, and assembly is simple and reliable. The actuator can be widely applied to various equipment that need linear drive.

Description

Technical Field

[0001] This utility model relates to the field of drive device technology, specifically to an electric actuator that converts the rotational motion of a motor into linear motion and an automobile having the actuator. Background Technology

[0002] Linear actuators have wide applications in industrial automation, automotive, and home appliances. Traditional electric actuators typically use a motor to drive a lead screw or bolt, outputting thrust or pull force through the linear motion of a nut. However, many existing actuators suffer from problems such as complex structure, poor sealing, and high manufacturing costs. For example, some patents reveal complex locking and transmission mechanisms, while others focus on specific sealing and emergency release devices. While these designs are effective in certain applications, their structures are relatively complex. Summary of the Invention

[0003] The purpose of this invention is to overcome the shortcomings of the prior art and provide an electric actuator that is simple and compact in structure, has good sealing performance, low manufacturing cost and is easy to assemble.

[0004] To achieve the above objectives, the present invention adopts the following technical solution.

[0005] An electric actuator mainly includes a housing, a drive motor, a screw, and a push rod. A cavity is formed within the housing for mounting the various components. The drive motor is fixed within the housing, and its output shaft is connected to the screw and drives its rotation. The push rod has internal threads that mesh with the external threads on the screw. Crucially, an anti-rotation structure is installed between the push rod and the housing. This structure allows the push rod axial movement freely but strictly restricts its circumferential rotation. Therefore, when the motor drives the screw in both forward and reverse directions, the push rod will perform precise linear reciprocating motion under the transmission of the threaded pair.

[0006] Preferably, the anti-rotation structure can adopt a simple form of protrusion and groove matching, such as the anti-rotation protrusion on the push rod and the anti-rotation groove on the housing. The housing is preferably assembled from an upper cover and a lower cover by a snap-fit ​​and interlocking structure, which simplifies the assembly process and enhances the sealing performance. The extended end of the push rod is also provided with a sealing ring to seal the push rod movement clearance, rather than the connection clearance between the actuator and external components, and works in conjunction with the sealing groove inside the housing to effectively prevent dust and moisture from entering.

[0007] The beneficial effects of this utility model are as follows.

[0008] Easy assembly: The snap-fit ​​housing design eliminates the need for multiple screw connections, enabling rapid assembly of the actuator and improving production efficiency.

[0009] Reliable sealing: The upper and lower covers adopt an interlocking convex and concave design, combined with the sealing treatment at the wire harness through-hole, between the upper and lower covers, and the application of sealing rings, forming multiple sealing barriers with excellent dustproof and waterproof performance.

[0010] Compact structure and stable operation: The anti-rotation and anti-movement structure integrated on the lower cover ensures the precise guidance and positioning of the push rod and screw during movement, reduces energy loss, and improves transmission efficiency and reliability.

[0011] Wide applicability: This actuator has a simple and reliable structure, making it very suitable for various linear drive scenarios in the automotive industry where space, cost, and reliability requirements are high. Attached Figure Description

[0012] Figure 1: Exploded view of the locking mechanism of this utility model embodiment, the marked components include push rod 1, lower cover 2, toggle block 3, sealing ring 4, upper cover 5, screw 6, and drive motor 7; Figure 2: Schematic diagram of push rod 1, including internal thread 101, anti-rotation protrusion 102, clamp 103, and push rod shaft 104; Figure 3: Schematic diagram of screw 6, including motor connection part 601, groove 602, external thread 603, and limiting part 604; Figure 4: Schematic diagram of the upper cover 5, including upper motor groove 501, upper anti-movement protrusion 502, upper anti-rotation groove 503, upper sealing ring groove 504, upper buckle groove 505, upper outward protrusion 506, upper inward concave part 507, upper fixing hole 508, upper guide surface 509, and upper wire harness through hole 510. Figure 5: Schematic diagram of the lower cover 2, including lower motor groove 201, lower anti-movement protrusion 202, lower anti-rotation groove 203, lower sealing groove 204, lower buckle protrusion 205, lower inner recess 206, lower outer protrusion 207, lower fixing hole 208, lower guide surface 209, and lower wire harness through hole 210. Figure 6 : Actuator assembly diagram, where T is the direction of push rod 1 extending, S is the direction of push rod 1 retracting, A is the direction of screw 6 rotating forward, and C is the direction of screw 6 rotating backward; Figure 7 The exploded view of the locking mechanism of this utility model embodiment shows that the components include push rod 1-1, lower cover 1-2, toggle block 1-3, sealing ring 1-4, upper cover 1-5, screw 1-6, and drive motor 1-7 (output shaft 1-701, motor 1-702). Detailed Implementation

[0013] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and do not limit the scope of this utility model.

[0014] In the description of this utility model, it should be understood that the terms "set" refer to one object having a slotted feature and another object having an axle or protrusion feature, and the two objects fitting together; "through" refers to one object having an axle feature fitting with another object having a slotted feature.

[0015] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used in the description of this application is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms "comprising" and "having" and any variations thereof in the description, claims and foregoing drawings of this application are intended to cover non-exclusive inclusion.

[0016] Assembly of drive motor, screw, push rod, etc.: Screw 6 is mounted on the output shaft of drive motor via motor connection part 601 (the mutual cooperation has the function of preventing mutual rotation; in this embodiment, it is a D-type shaft and D-type hole cooperation). Push rod 1 is screwed to the external thread 603 (generally a T-type transmission thread, which can be a single-start or multi-start thread; it can also be a round, rectangular, triangular, etc. thread) on screw 6 via internal thread 101 (generally a T-type transmission thread, which can be a single-start or multi-start thread; it can also be a round, rectangular, triangular, etc. thread). Sealing ring 4 is mounted on the push rod shaft 104 of push rod 1.

[0017] Assembly of the upper and lower housings: Based on the previous step, the drive motor 7, screw 6, push rod 1, and sealing ring 4 are all placed into the lower cover. The drive motor 7 is placed in the lower motor groove 201 (there is an anti-rotation function between the motor and the cover); the groove 602 of the screw 6 is paired with the lower anti-movement protrusion 202, and the limiting part 604 is placed at both ends of the lower anti-movement protrusion 202 (to prevent the screw 6 from moving axially); the anti-rotation protrusion 102 on the push rod 1 is placed in the lower anti-rotation groove 203, the push rod shaft 104 is placed in the lower guide surface 209, and the sealing ring 4 is snapped into the lower sealing groove 204; the wiring harness of the drive motor 7 is led out of the lower cover 2 through the lower wiring harness hole 210. Apply sealant to the recessed portion 206 and the lower wiring harness through hole 201 around the entire circumference of the lower cover 2, and then close the upper cover 5 onto the lower cover 2. (The upper cover 5 has features corresponding to the lower cover 2 and mates with other parts like the lower cover 2. These features include: the upper motor groove 501 corresponding to the lower motor groove 201, the upper anti-movement protrusion 502 corresponding to the lower anti-movement protrusion 202, the upper anti-rotation groove 503 corresponding to the lower anti-rotation groove 203, and the upper sealing groove 504.) The corresponding features (corresponding to the lower sealing groove 204, the upper snap-fit ​​groove 505 corresponding to the lower snap-fit ​​protrusion 205, the upper outward protrusion 506 corresponding to the lower inward concave portion 206, the upper inward concave portion 507 corresponding to the lower outward protrusion 207, the upper fixing hole 508 corresponding to the lower fixing hole 208, the upper guide surface 509 corresponding to the lower guide surface 209, and the upper wire harness through hole 510 corresponding to the lower wire harness through hole 210) are all fitted together and engaged by the upper snap-fit ​​groove 505 and the lower snap-fit ​​protrusion 205. Then, sealant is applied to the mating area formed by the upper wire harness through hole 510 and the lower wire harness through hole 210. At this point, the actuator assembly is complete. When using the actuator, a latching block 3 is generally provided to connect the actuator and the drive boundary in order to match the usage boundary. The latching block 3 is generally fixed to the latching connector 103 by a snap-fit ​​assembly.

[0018] Operating Process: When the input drive current is applied, the output shaft of the drive motor 7 rotates along direction A, causing the screw 6 to rotate synchronously. Based on the principle of threaded transmission (due to the upper anti-rotation groove 503 and lower anti-rotation groove 203 acting on the anti-rotation protrusion 102 on the push rod 1, preventing the push rod 1 from rotating), the push rod 1 moves in the T direction. When the positive and negative poles of the input drive current are reversed, the output shaft of the drive motor 7 rotates along direction C, causing the screw 6 to rotate in the C direction. Furthermore, based on the principle of threaded transmission, this causes the push rod 1 to move in the S direction. In other words, by reversing the input current, the switching between the T-direction and S-direction movements of the push rod 1 is achieved.

[0019] In the above embodiments, if the boundary is spatially limited in the length direction, it may be considered to use... Figure 7 The structure shown features an L-shaped drive motor, with the output shaft parallel to the motor rather than coaxial. With this structure, the locking mechanism can be disassembled as follows: Figure 7 The marked components include push rod 1-1 (corresponding to...) Figure 1 The push rod 1 and the lower cover 1-2 in the structural structure (corresponding to) Figure 1 The lower cover 2 and the lever blocks 1-3 in the structural structure (corresponding to) Figure 1 In the structural structure, the push block 3) and sealing rings 1-4 (corresponding to) Figure 1 The sealing ring 4 in the structural structure), and the top cover 1-5 (corresponding to) Figure 1 The top cover 5 and screws 1-6 in the structural structure (corresponding to) Figure 1 The screw 6 in the structure), drive motors 1-7 (corresponding to) Figure 1 The drive motor 7 in the structure), related structural principles and Figure 1 The structures shown are the same, only the structural arrangement is different.

[0020] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and substitutions can be made without departing from the technical principles of the present utility model, and these improvements and substitutions should also be considered within the protection scope of the present utility model.

Claims

1. An electric actuator, characterized in that include: The housing includes an upper cover and a lower cover; The drive motor is housed within the housing; The screw is driven to rotate by the drive motor; A push rod having an internal thread that meshes with the external thread of the screw; An anti-rotation structure is provided between the push rod and the housing to restrict the circumferential rotation of the push rod; The drive motor drives the screw to rotate in both directions, thereby driving the push rod to extend or retract axially through threaded transmission.

2. The electric actuator according to claim 1, characterized in that The anti-rotation structure includes an anti-rotation protrusion formed on the push rod and an anti-rotation groove formed on the upper cover and / or lower cover that mates with the anti-rotation protrusion.

3. An electric actuator according to claim 1 or 2, c h a r a c t e r i s e d in that The screw is connected to the output shaft of the drive motor via its motor connection portion in an anti-rotation manner.

4. The electric actuator according to claim 3, characterized in that The housing is provided with a protrusion to prevent movement, and the screw is provided with a groove that cooperates with the protrusion to limit the axial movement of the screw.

5. The electric actuator of claim 1, wherein, It also includes a sealing ring, which is fitted onto the push rod shaft of the push rod and accommodated in the sealing grooves of the upper cover and the lower cover.

6. The electric actuator of claim 1, wherein, The upper cover and the lower cover are connected by a snap fastener. The snap fastener connection includes a lower snap fastener protrusion on the lower cover and an upper snap fastener groove on the upper cover that engages with the lower snap fastener protrusion.

7. The motorized actuator of claim 1, wherein, The mating edges of the upper cover and the lower cover are respectively provided with an upper outward protrusion and a lower inward concave portion, as well as an upper inward concave portion and a lower outward protrusion.

8. The electric actuator of claim 1, wherein, The push rod is equipped with a snap-fit ​​connector for connecting the lever.

9. The electric actuator of claim 1, wherein, When the upper and lower covers are closed, sealant is applied to the lower recess of the lower cover and also to the wire harness through-holes to further waterproof and dustproof the actuator.

10. An automobile characterized by It includes any one of the electric actuators described in claims 1-9.

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