A door drive device

Abstract

The utility model discloses a vehicle door driving device, including screw rod and driving part, the screw rod one end is equipped with ball head, the screw rod other end screw thread cooperation has the sliding block, the ball head is equipped with the sleeve, the sleeve inner wall is spherical, the sleeve inner wall and ball head outer wall are pasted, the driving part is sleeved in the sleeve, driving part both sides are equipped with the bearing, the bearing is sleeved in the sleeve and is located in the shell mounting hole, the utility model discloses a vehicle door driving device adopts ball head and sleeve, even if the mounting hole precision of shell is poor, and screw rod can also automatic calibration, always keep stable, avoid the increase of the acting force between threaded hole and sliding rail and lead to the wear between sliding block and sliding rail aggravate, make the vehicle door switch smooth, and the noise is little, and the user adaptation feeling is good.

Description

Technical Field

[0001] This utility model relates to vehicle door drive technology, specifically a vehicle door drive device. Background Technology

[0002] With the development of electric and intelligent vehicles, door systems are gradually evolving from manual doors to automated door systems.

[0003] Most car doors on the market can be opened and closed electrically. The door drive mechanism that realizes the above-mentioned electric door opening and closing function generally adopts the following structure: including a motor, gearbox, transmission gear, and lead screw. The transmission gear is directly fixed to the end of the lead screw. The transmission gear is rotatably confined in the housing through bearings. The lead screw is connected to the gearbox through the transmission gear. The rotation of the lead screw drives the slider to move along the guide groove of the guide tube to realize the opening and closing of the car door. However, the lead screw is relatively long and is directly fixed to the transmission gear. The accuracy requirements of the mounting hole of the housing are difficult to guarantee. Therefore, the concentricity between the lead screw and the mounting hole is poor, causing instability at the other end of the lead screw and wobbling. This leads to increased wear between the slider and the slide rail, abnormal noise when the car door is opened and closed, and a poor user experience. Utility Model Content

[0004] To address the shortcomings of the prior art, this utility model provides a door drive device that can automatically calibrate, improve the stability of the lead screw, and prevent the lead screw end from swaying.

[0005] To achieve the above technical objectives, the present invention adopts the following technical solution: a car door drive device, comprising a lead screw and a drive component, wherein one end of the lead screw is provided with a ball head, and the other end of the lead screw is threaded with a slider, the ball head is fitted with a sleeve, the inner wall of the sleeve is spherical, the inner wall of the sleeve is in contact with the outer wall of the ball head, the drive component is fitted on the sleeve, and bearings are provided on both sides of the drive component, the bearings are fitted on the sleeve and located in the mounting hole of the outer shell.

[0006] Preferably, the sleeve consists of two arc plates, which are semi-circular in shape.

[0007] Preferably, a plurality of limiting blocks are evenly distributed in the middle of the outer wall of the sleeve, and a plurality of limiting grooves that cooperate with the limiting blocks are provided on the inner wall of the driving component.

[0008] Preferably, the inner wall of the bearing is fixed to the sleeve, and the outer wall of the bearing is fixed to the inner wall of the housing mounting hole.

[0009] Preferably, both sides of the ball head are provided with positioning grooves, and positioning blocks are provided in the positioning grooves. The positioning blocks are spindle-shaped and fixed to the inner wall of the sleeve.

[0010] Preferably, the outer periphery of the ball head is uniformly distributed with oil grooves.

[0011] Preferably, the driving component includes a gear or a bevel gear.

[0012] In summary, this utility model achieves the following technical effects:

[0013] The door drive device of this utility model adopts a ball head and sleeve. Even if the mounting hole on the outer shell has poor precision, the lead screw can automatically calibrate and always remain stable. This avoids the increase of the force between the threaded hole and the slide rail, which would lead to increased wear between the slider and the slide rail. As a result, the door opens and closes smoothly with low noise and good user experience. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural schematic diagram of the door drive device of this utility model;

[0015] Figure 2 This is a schematic diagram of the structure of the door drive device of this utility model;

[0016] Figure 3 This is a side view of the door drive device of this utility model;

[0017] Figure 4 This is a schematic diagram of the assembly structure of the door drive device of this utility model;

[0018] Figure 5 This is a schematic diagram of the structure of a second embodiment of the door drive device of this utility model;

[0019] Figure 6 This is a schematic diagram of the assembly structure of Embodiment 2 of the door drive device of this utility model;

[0020] The following are the markings on the attached diagrams: 1. Lead screw; 2. Ball head; 3. Sleeve; 4. Limit block; 5. Gear; 6. Bearing; 7. Oil groove; 8. Bevel gear; 9. Guide tube; 10. Slider. Detailed Implementation

[0021] The present invention will be further described in detail below with reference to the accompanying drawings.

[0022] This specific embodiment is merely an explanation of the present utility model and is not intended to limit the present utility model. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but as long as they are within the scope of the claims of the present utility model, they are protected by patent law.

[0023] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0024] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0025] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0026] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0027] Example 1:

[0028] like Figure 1-4As shown, a car door drive device includes a lead screw 1 and a drive component. One end of the lead screw 1 is provided with a ball head 2, and the other end of the lead screw 1 is threaded with a slider. The ball head 2 is fitted with a sleeve 3, the inner wall of the sleeve 3 is spherical, and the inner wall of the sleeve 3 fits against the outer wall of the ball head 2. The drive component is fitted on the sleeve 3, and bearings 6 are provided on both sides of the drive component. The bearings 6 are fitted on the sleeve 3 and located in the mounting hole of the outer shell.

[0029] The ball head 2 is a rubber-coated part, which is directly integrally formed with the lead screw 1.

[0030] The sleeve 3 consists of two arc plates, which are semi-circular in shape; the arrangement of the two arc plates allows the ball head 2 to be better inserted into the sleeve 3.

[0031] The outer wall of the sleeve 3 is evenly distributed with several limiting blocks 4, and the inner wall of the driving component is provided with several limiting grooves that cooperate with the limiting blocks 4; the setting of the limiting blocks 4 and the limiting grooves can make the driving component rotate to drive the lead screw 1 to rotate.

[0032] The inner wall of the bearing 6 is fixed to the sleeve 3, and the outer wall of the bearing 6 is fixed to the inner wall of the housing mounting hole; the gear 5 and the lead screw 1 can be fixed in the housing mounting hole by means of the two bearings 6.

[0033] The ball head 2 is provided with positioning grooves on both sides, and positioning blocks are provided in the positioning grooves. The positioning blocks are spindle-shaped and fixed to the inner wall of the sleeve 3. The positioning grooves and positioning blocks can make the driving component and the sleeve 3 rotate, thereby driving the ball head 2 and the lead screw 1 to rotate.

[0034] The ball head 2 has oil grooves 7 evenly distributed around its outer periphery; the oil grooves 7 can store a certain amount of lubricant, so that the lubricating oil can lubricate the contact surface between the ball head 2 and the sleeve 3 for a longer period of time.

[0035] The driving component is gear 5.

[0036] Example 2:

[0037] like Figure 5-6 As shown, the driving component is a bevel gear 8.

[0038] During assembly, two arc plates are installed on both sides of the ball head 2, allowing the positioning block to enter the positioning groove. Then, the drive component and two bearings 6 are fitted in, and then installed into the housing mounting hole. The bearings 6 are interference-fitted with the housing mounting hole. Finally, the lead screw 1 and the slider 10 are threaded together. The slider 10 moves along the guide groove in the guide tube 9. Even if the slider 10 and the drive component are not aligned, the ball head 2 can move in the sleeve 3, so that the slider 10 and the drive component are restored to the aligned state, ensuring the stable transmission of the slider 10, lead screw 1 and drive component.

[0039] The door drive device of this utility model adopts ball head 2 and sleeve 3. Even if the mounting hole on the outer shell has poor precision, the lead screw 1 can automatically calibrate and always remain stable. This avoids the increase of the force between the threaded hole and the slide rail, which would lead to increased wear between the slider and the slide rail. This makes the door opening and closing smooth, with low noise and good user experience.

[0040] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model shall fall within the scope of the technical solution of the present utility model.

Claims

1. A door drive device, characterized in that, The device includes a lead screw and a drive component. One end of the lead screw is provided with a ball head, and the other end of the lead screw is threaded with a slider. The ball head is fitted with a sleeve, the inner wall of which is spherical and fits against the outer wall of the ball head. The drive component is fitted onto the sleeve, and bearings are provided on both sides of the drive component. The bearings are fitted onto the sleeve and located in the mounting hole of the outer casing.

2. The door drive device according to claim 1, characterized in that, The sleeve consists of two arc plates, which are semi-circular.

3. A door drive device according to claim 1, characterized in that, The outer wall of the sleeve is evenly distributed with several limiting blocks, and the inner wall of the drive component is provided with several limiting grooves that cooperate with the limiting blocks.

4. A door drive device according to claim 1, characterized in that, The inner wall of the bearing is fixed to the sleeve, and the outer wall of the bearing is fixed to the inner wall of the housing mounting hole.

5. A door drive device according to claim 1, characterized in that, The ball head is provided with positioning grooves on both sides, and positioning blocks are provided in the positioning grooves. The positioning blocks are spindle-shaped and fixed to the inner wall of the sleeve.

6. A door drive device according to claim 1, characterized in that, Oil grooves are evenly distributed on the outer periphery of the ball head.

7. A door drive device according to claim 1, characterized in that, The driving component includes a gear or a bevel gear.

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