Transmission mechanism and movable arm connecting structure for automobile door actuator

Abstract

The utility model relates to an automobile door actuator, in particular to a transmission mechanism and movable arm connecting structure for an automobile door actuator. According to the transmission mechanism and movable arm connecting structure for the automobile door actuator, the movable arm is provided with a matching hole, the transmission mechanism is provided with a fixing block used for being connected with the movable arm, a matching groove for receding the end of the movable arm is formed in the position of the fixing block, and the two parts, separated by the matching groove, of the fixing block are limiting parts. A rotating shaft is arranged at the position of the matching groove, the matching hole penetrates through the two opposite sides of the movable arm, a ball structure is arranged in the middle of the rotating shaft and located in the matching hole, and the end, provided with the matching hole, of the movable arm is located between the two limiting parts. The utility model has the advantages that the installation error can be compensated, and the transmission stability can be ensured.

Description

Technical Field

[0001] The utility model relates to an automobile door actuator, in particular to a transmission mechanism and a movable arm connecting structure for the automobile door actuator. Background Art

[0002] The Chinese patent application number 202221007232.6 discloses a car side door actuator, whose movable arm is connected to a screw nut matched with a screw rod, and the screw rod is rotated to make the screw nut move along the axial direction of the screw rod, thereby driving the movable arm connected to the body to extend into the actuator or extend out from the actuator to realize the opening and closing of the door. The screw nut has a metal shaft riveted laterally extending sideways, and a round sleeve with an inner diameter slightly larger than the outer diameter of the metal shaft is sleeved on the metal shaft. One end of the movable arm is connected to the round sleeve, and the other end of the movable arm extends out of the actuator and is connected to the body.

[0003] Although the above scheme can realize the linkage between the screw nut and the movable arm of the transmission mechanism, due to the installation errors of the components, the movable arm itself may twist, and the movable arm will collide with the washer on the metal shaft for limiting the axial position of the movable arm. After long-term use, the parts may be deformed and twisted, and there may be jamming at the place where the movable arm and the metal shaft are mutually installed, resulting in poor transmission effect.

[0004] A Chinese patent with application number 202310241990.7 discloses an actuator for automatically opening and closing car doors. This solution arranges a ball head structure on the lead screw nut and a matching hole that matches the ball head structure at the end of the movable arm so that the end of the movable arm can rotate at various angles relative to the lead screw nut, thereby compensating for installation errors. However, the relative position of the movable arm will be farther away from the lead screw, resulting in an increase in the overall volume and occupying a larger space. In addition, the movable arm will be directly supported on the ball head, and only one end of the ball head shaft of the ball head is connected to the lead screw nut. The ball head and the lead screw nut are easy to loosen, and the thinner and longer ball head is more likely to transfer force to the lead screw nut itself after being subjected to force. The lead screw nut is tilted relative to the lead screw, resulting in a poor transmission effect. Utility Model Content

[0005] The utility model aims to provide a transmission mechanism and movable arm connecting structure for an automobile door actuator which can compensate for installation errors and ensure stable transmission.

[0006] To achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a connection structure between a transmission mechanism and a movable arm for a car door actuator, the movable arm having a matching hole, the transmission mechanism having a fixed block for connecting with the movable arm, the fixed block being provided with a matching groove for giving way to the end of the movable arm, the two parts of the fixed block separated by the matching groove being a limiting part, the matching groove being provided with a rotating shaft, the matching hole passing through the opposite sides of the movable arm, a spherical structure being provided in the middle of the rotating shaft, the spherical structure being located in the matching hole, and the end of the movable arm having the matching hole being located between the two limiting parts.

[0007] The utility model sets a spherical structure at the rotating shaft on the fixed block connected to the movable arm of the transmission mechanism, which is convenient for the movable arm to rotate at various angles, thereby compensating for the installation error. At the same time, it is not necessary to set a conventional ball head seat and other structures for matching the ball head on the movable arm. The setting position of the movable arm can be closer to the screw rod, thereby ensuring the overall compactness and avoiding excessive volume, so as to facilitate installation in the doors of different models of vehicles. Among them, the utility model limits the movable arm through the limiting part formed by the fixed block itself, avoiding the movable arm from having a large displacement along the axial direction of the rotating shaft, and improving the fixing stability of the movable arm while ensuring that the movable arm rotates with the ball head structure as the center; when the movable arm rotates, it will approach the side wall of the limiting part. Since the limiting part is a part of the fixed block, even if the movable arm contacts and abuts against the limiting part, since the limiting part can be set thicker and longer, the limiting part is not easy to be greatly deformed, which can delay the service life.

[0008] The rotating shaft of the utility model is arranged in the matching groove of the fixed block, and the two ends of the rotating shaft can be fixed with the limiting part of the fixed part. The fixing stability of the rotating shaft with a spherical structure is better, and it is less likely to shake compared with the scheme mentioned in the background technology. Due to the above arrangement, the length of the fixed block of the utility model along the length direction of the movable arm is longer to facilitate the setting of the matching groove, and the fixed block needs to be made larger, so as to further ensure its own structural stability. Whether the fixed block and the screw nut of the utility model are integrally formed or fixed together by fasteners, they can maintain better structural stability; the fixed block can even contact the inner wall of the shell to improve stability, so as to avoid causing the screw nut to tilt relative to the screw.

[0009] Among them, since the rotation floating of the movable arm relative to the spherical structure is small, the spherical structure of the utility model only needs to be spherical in the part that cooperates with the wall of the matching hole, and there is no need to make the middle part of the rotating shaft into a complete sphere. The spherical structure can be flat near the two ends of the rotating shaft.

[0010] Preferably, the movable arm comprises a movable arm body and an elastic member, the end of the movable arm body has a fixing hole, the elastic member has the matching hole, and the elastic member is fixed in the fixing hole.

[0011] By arranging an elastic member on the movable arm, the inner wall of the elastic member can be deformed, which can increase the contact area between the matching hole of the movable arm and the ball head structure, ensure the linkage effect, and at the same time avoid the matching hole being too large or too small, which is convenient for the manufacture and assembly of the movable arm. The elastic member itself can be deformed as a whole to adapt to a larger installation error. The elastic member can be spring steel. The elastic member and the movable arm body can be fixed by various fixing methods such as welding and fasteners.

[0012] Preferably, the transmission mechanism includes a screw nut, the fixing block is a part of the screw nut, and the nut part of the screw nut is integrally formed with the fixing block. Through the above arrangement, the overall structural strength of the fixing block and the screw nut is increased; the screw nut with the fixing block can be obtained by injection molding, which is more convenient than riveting or other fixing methods between the two parts.

[0013] Preferably, a reinforcing frame is provided inside the screw nut, and the reinforcing frame includes a first frame located inside the nut part and a second frame located at the limiting part. The nut part of the screw nut forms an internal thread structure, the first frame surrounds or semi-encloses the circumferential outer side of the internal thread structure, and the second frame surrounds or semi-encloses the circumferential outer side of the end of the rotating shaft. The above arrangement further increases the structural strength of the screw nut with a fixed block.

[0014] Preferably, the first frame is connected to the second frame. The above arrangement further increases the structural strength of the screw nut with the fixing block, and at the same time makes it easier for the screw nut to be injection-molded outside the reinforcement frame.

[0015] The utility model has the advantages of being able to compensate for installation errors and ensuring stable transmission. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 The utility model is a structural schematic diagram of the connection between the screw nut and the movable arm of the transmission mechanism.

[0017] Figure 2 It is a cross-sectional view of the utility model.

[0018] Figure 3 Another cross-sectional view of the utility model. DETAILED DESCRIPTION

[0019] The utility model is further described below based on the accompanying drawings and specific embodiments.

[0020] Depend on Figures 1 to 3As shown, this embodiment discloses a transmission mechanism and a movable arm connection structure for an automobile door actuator. The transmission mechanism of this embodiment can adopt any existing mechanism of an automobile door actuator for transmitting torque through a screw and a screw nut. The screw (not shown in the figure) is used to receive the torque output by a drive motor (not shown in the figure). The screw nut 100 is threadedly engaged on the screw. The automobile door actuator has a shell located on the circumferential outside of the screw. The inner edge shape of the shell cross-section and the outer edge shape of the screw nut 100 cross-section are both non-circular. The rotation of the screw nut 100 relative to the screw is limited by guiding the inner wall of the shell and the outer wall of the screw nut 100 in contact.

[0021] The screw nut 100 of this embodiment includes a nut portion 11 with an internal thread structure and a fixed block 12 for connecting to the movable arm 200. The nut portion 11 and the fixed block 12 are integrally formed, and the length of the fixed block 12 along the axial direction of the screw is greater than the axial length of the nut portion 11. A matching groove 121 is provided at one end of the fixed block 12, and the matching groove separates the end of the fixed portion into two limiting portions 122. A rotating shaft 3 is provided at the end of the fixed block 12, and the two ends of the rotating shaft are respectively fixed to a limiting portion 122. A spherical structure 31 is provided in the middle of the rotating shaft 3, and the width of the spherical structure 31 along the axial direction of the rotating shaft 3 is less than the diameter of the spherical structure 31. This embodiment further improves the transmission stability by increasing the contact surface and contact range between the screw nut 100 and the inner wall of the shell to prevent the screw nut 100 from being tilted relative to the screw under force.

[0022] Among them, a reinforcing frame is provided in the screw nut 100, and the reinforcing frame includes a first frame 111 located in the nut part 11 and a second frame 123 located at the limiting part 122. The first frame 111 and the second frame 123 are connected and formed as one piece. The first frame 111 encloses or semi-encloses the circumferential outer side of the internal thread structure, and the second frame 123 encloses or semi-encloses the circumferential outer side of the three parts of the rotating shaft end.

[0023] The movable arm 200 includes a movable arm body 21 and an elastic member 22 with a ring-shaped cross section. The elastic member of this embodiment is spring steel. The end of the movable arm body 21 has a fixing hole that passes through both sides. The elastic member 22 has a matching hole that passes through both sides. The elastic member 22 is fixed in the fixing hole. When the movable arm 200 is assembled with the rotating shaft 3, the end of the elastic member 22 of the movable arm 200 is located in the matching groove and between the two limiting portions 122. The spherical structure 31 on the rotating shaft 3 is located in the fixing hole, and the inner wall of the elastic member 22 is deformed to contact with the spherical surface formed by the ball head structure 31, rather than point contact. Among them, the rotating shaft 3 of this embodiment includes a rotating shaft body 30 and a spherical structure 31 that is sleeved and fixed on the rotating shaft body 30. The rotating shaft 30 is fixed to the limiting portion 122 of the fixed block and the hollow spherical structure 31 by riveting.

[0024] This embodiment has the advantages of being able to compensate for installation errors and ensure stable transmission.

Claims

1. A structure for connecting a transmission mechanism and a movable arm for a vehicle door actuator, wherein the movable arm has a matching hole, and the transmission mechanism has a fixing block for connecting with the movable arm, characterized in that: The fixed block is provided with a matching groove for giving way to the end of the movable arm, and the two parts of the fixed block separated by the matching groove are the limiting parts. The matching groove is provided with a rotating shaft, and the matching hole passes through the opposite sides of the movable arm. A spherical structure is provided in the middle of the rotating shaft, and the spherical structure is located in the matching hole, and the end of the movable arm with the matching hole is located between the two limiting parts.

2. The transmission mechanism and movable arm connection structure for a vehicle door actuator according to claim 1, characterized in that: The movable arm comprises a movable arm body and an elastic member, the end of the movable arm body is provided with a fixing hole, the elastic member is provided with the matching hole, and the elastic member is fixed in the fixing hole.

3. The transmission mechanism and movable arm connection structure for a vehicle door actuator according to claim 1 or 2, characterized in that: The transmission mechanism comprises a screw nut, the fixing block is a part of the screw nut, and the nut part of the screw nut is integrally formed with the fixing block.

4. The transmission mechanism and movable arm connection structure for a vehicle door actuator according to claim 3, characterized in that: A reinforcing frame is provided inside the screw nut, and the reinforcing frame includes a first frame located inside the nut part and a second frame located at the limiting part. The nut part of the screw nut constitutes an internal thread structure, the first frame encloses or semi-encloses the circumferential outer side of the internal thread structure, and the second frame encloses or semi-encloses the circumferential outer side of the rotating shaft end.

5. The transmission mechanism and movable arm connection structure for a vehicle door actuator according to claim 4, characterized in that: The first skeleton is connected to the second skeleton.

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