Buffering structure for connecting shaft of electric door driving device

Abstract

The utility model relates to an electric door driving device connecting shaft buffer structure which comprises an output shaft in butt joint with the output end of a driving motor assembly, a first gear shaft connected with a gear transmission assembly and an inter-shaft buffer cap made of elastic materials. The first gear shaft is provided with a butt joint end used for being inserted into the butt joint groove, and the inter-shaft buffer cap is connected between the butt joint groove and the butt joint end in an interference fit mode. The inter-shaft buffer cap is made of the elastic rubber material and is in interference fit with the output shaft and the first gear shaft, so that some impact and vibration are inevitably generated in the starting and running processes of the driving motor assembly, and the vibration transmitted from the output shaft is absorbed and weakened by the inter-shaft buffer cap; the vibration transmitted to the first gear shaft is greatly reduced; the elastic structure of the inter-shaft buffer cap can also eliminate the eccentric vibration problem caused by manufacturing deviation between the output axis of the driving motor assembly and the axis of the first shaft gear, so that vibration and noise transmitted outwards by the whole electric door driving device are reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of automobile parts, and particularly relates to a connecting shaft buffer structure of an electric door driving device. Background Art

[0002] With the development of automobile electrification and intelligence, the electric opening and closing of automobile doors has gradually become popular. The configuration rate of electric tailgate has exceeded 50%, and electric side doors have also appeared on a few high-end models. As the core component of electric side doors, the electric door drive device is still in the early stages of industry development. The traditional drive device outputs the driving force through the drive motor assembly, and then applies the driving force to the door opening and closing push rod assembly through the gear transmission assembly to achieve the door opening and closing. During this period, the output driving force will be transmitted through multiple components, resulting in some deficiencies in comfort such as noise and vibration. One of the reasons is that the motor output end is directly connected to the gear transmission assembly, so that the impact when the motor starts and the vibration during operation will be directly transmitted to the gear, and then from the gear to the gear shaft, housing, and door body, which will generate noise; therefore, we propose a buffer structure for the connecting shaft of the electric door drive device to solve the above problems. Utility Model Content

[0003] In order to solve the above problems, the utility model provides a buffer structure of a connecting shaft of an electric door driving device, which solves the problem of noise generated by vibration.

[0004] The utility model is realized through the following scheme: a buffer structure of a connecting shaft of an electric door driving device is arranged between a driving motor assembly and a gear transmission component installed inside a shell, the gear transmission component is transmission-connected between the driving motor assembly and the door opening and closing push rod component, the buffer structure includes an output shaft docked with the output end of the driving motor assembly, a first gear shaft connected with the gear transmission component, and an inter-shaft buffer cap of elastic material, a docking groove is provided on the output shaft, a docking end for inserting into the docking groove is provided on the first gear shaft, and the inter-shaft buffer cap is interference-fittedly connected between the docking groove and the docking end.

[0005] A further improvement of the buffer structure of the connecting shaft of an electric door driving device of the utility model lies in that the docking groove, the docking end and the inter-axle buffer cap are a plum blossom-shaped nested structure arranged on the same axis.

[0006] A further improvement of the buffer structure of the connecting shaft of an electric door driving device of the utility model lies in that a supporting channel is formed in the shell, and a bushing bearing for the first gear shaft to pass through is arranged in the supporting channel.

[0007] A further improvement of the buffer structure of the connecting shaft of the electric door driving device of the utility model lies in that the inter-shaft buffer cap is made of elastic rubber material as a whole.

[0008] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0009] The utility model uses an inter-shaft buffer cap made of elastic rubber material and has an interference fit with the output shaft and the first gear shaft. Some impacts and vibrations are inevitable during the startup and operation of the drive motor assembly. The vibration transmitted from the output shaft is absorbed and weakened by the inter-shaft buffer cap, which greatly reduces the vibration transmitted to the first gear shaft. The elastic structure of the inter-shaft buffer cap can also eliminate the eccentric vibration problem caused by manufacturing deviation between the output axis of the drive motor assembly and the axis of the first shaft gear, thereby reducing the vibration and noise transmitted to the outside by the entire electric door drive device. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 The exploded schematic diagram of the electric door driving device of the utility model is shown.

[0011] Figure 2 The utility model shows a cross-sectional structural diagram of the installation position of the output shaft assembly.

[0012] Figure 3 The utility model output shaft assembly structure schematic diagram is shown.

[0013] Figure 4 The utility model shows a schematic cross-sectional structure diagram of the motor output shaft, the inter-shaft buffer cap and the first gear shaft when connected.

[0014] In the figure: 11, housing; 15, drive motor assembly; 16, buffer structure; 161, output shaft; 162, inter-shaft buffer cap; 163, bushing bearing; 164, first gear shaft; 17, gear transmission assembly; 18, door opening and closing push assembly. DETAILED DESCRIPTION

[0015] In order to solve the problem of noise caused by vibration, the utility model provides a buffer structure for the connecting shaft of an electric door driving device. The buffer structure for the connecting shaft of an electric door driving device is further described below with reference to a specific embodiment and the accompanying drawings.

[0016] See also Figure 1 to Figure 4As shown, a buffer structure of a connecting shaft of an electric door driving device is arranged between a driving motor assembly 15 and a gear transmission component 17 installed inside a shell 11. The gear transmission component 17 is transmission-connected between the driving motor assembly 15 and the door opening and closing push rod assembly 18. The buffer structure 16 includes an output shaft 161 docked with the output end of the driving motor assembly 15, a first gear shaft 164 connected with the gear transmission component 17, and an inter-shaft buffer cap 162 made of elastic material. A docking groove is provided on the output shaft 161, a docking end for inserting into the docking groove is provided on the first gear shaft 164, and the inter-shaft buffer cap 162 is connected between the docking groove and the docking end by interference fit.

[0017] Through the interference fit between the output shaft 161 and the first gear shaft 164, some impact and vibration are inevitable during the startup and operation of the drive motor assembly 15. The vibration transmitted from the output shaft 161 is absorbed and weakened by the inter-shaft buffer cap 162, which greatly reduces the vibration transmitted to the first gear shaft 171; the elastic structure of the inter-shaft buffer cap 162 can also eliminate the eccentric vibration problem caused by manufacturing deviation between the output axis of the drive motor assembly 15 and the axis of the first shaft gear 171, thereby reducing the vibration and noise transmitted to the outside by the entire electric door drive device.

[0018] Among them, the docking groove, the docking end and the inter-axial buffer cap 162 are a plum blossom-shaped nested structure arranged on the same axis.

[0019] By adopting the above-mentioned design, the nested structure composed of the docking groove, the docking end and the inter-shaft buffer cap 162 can ensure stable transmission. When the output shaft rotates, the first gear shaft 164 can be driven to rotate through the nested structure. The inter-shaft buffer cap 162 can buffer the impact and vibration generated between the two during operation, weaken and reduce noise. At the same time, it is combined internally and has a small size, which can save space for the electric door drive device.

[0020] A support channel is formed in the housing 11 , and a bushing bearing 163 is provided in the support channel for the first gear shaft 164 to pass through.

[0021] By adopting the above design, a stable support and limit can be provided for the first gear shaft 164, while not hindering its rotation and avoiding eccentric vibration.

[0022] The inter-axial buffer cap 162 is made entirely of elastic rubber material.

[0023] The inter-axial buffer cap 162 made of elastic rubber material has excellent buffering performance and can better eliminate the eccentric vibration problem caused by manufacturing deviation between the output axis of the drive motor assembly 15 and the axis of the first gear shaft 164 .

[0024] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0025] The utility model is described in detail above in conjunction with the embodiments of the drawings. A person skilled in the art can make various variations of the utility model according to the above description. Therefore, some details in the embodiments should not constitute a limitation of the utility model, and the scope of protection of the utility model shall be defined by the scope of the attached claims.

Claims

1. A connecting shaft buffer structure of an electric door driving device, installed between a driving motor assembly and a gear transmission assembly inside a housing, wherein the gear transmission assembly is drivingly connected between the driving motor assembly and a door opening and closing push assembly, characterized in that: The buffer structure includes an output shaft connected to the output end of the drive motor assembly, a first gear shaft connected to the gear transmission assembly, and an inter-shaft buffer cap made of elastic material. A docking groove is provided on the output shaft, and a docking end for inserting into the docking groove is provided on the first gear shaft. The inter-shaft buffer cap is connected between the docking groove and the docking end by interference fit.

2. The connecting shaft buffer structure of an electric door driving device according to claim 1, characterized in that: The butt joint groove, butt joint end and inter-axial buffer cap are a plum blossom-shaped nested structure arranged on the same axis.

3. The connecting shaft buffer structure of an electric door driving device according to claim 1, characterized in that: A support channel is formed in the housing, and a bushing bearing for the first gear shaft to pass through is arranged in the support channel.

4. The connecting shaft buffer structure of an electric door driving device according to claim 1, characterized in that: The inter-axial buffer cap is made entirely of elastic rubber material.

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