阅读说明：本技术 一种汽车后背门 (Automobile back door ) 是由 宋大伟 席艳秋 王家林 宁小岳 周伟 于 2019-11-22 设计创作，主要内容包括：本发明的目的是提出一种窗框处结构强度较高的汽车后背门。本发明的汽车后背门由后背门内板、后背门外板及下窗框加强板构成,关键在于所述后背门内板由下部的后背门内板分总成与上部的上窗框、上部两侧的侧窗框及两侧的下窗框连接板一体构成,两侧的下窗框连接板之间形成对应下窗框的位置的虚位；所述下窗框加强板设有雨刮电机安装孔,下窗框加强板对应于后背门内板的所述虚位处,下窗框加强板的两端分别与两侧的下窗框连接板焊接固定,使下窗框加强板形成后背门内板的下窗框；所述后背门内板分总成在下窗框加强板的下方位置处设有若干支撑梁,所述支撑梁的顶端与下窗框加强板焊接固定；所述下窗框加强板的顶端与后背门外板的下窗框顶端焊接固定。(The invention aims to provide an automobile back door with a higher structural strength at a window frame. The automobile back door is composed of a back door inner plate, a back door outer plate and lower window frame reinforcing plates, and is characterized in that the back door inner plate is integrally composed of a back door inner plate sub-assembly at the lower part, an upper window frame at the upper part, side window frames at two sides of the upper part and lower window frame connecting plates at two sides, and a virtual position corresponding to the position of the lower window frame is formed between the lower window frame connecting plates at two sides; the lower window frame reinforcing plate is provided with a wiper motor mounting hole, the lower window frame reinforcing plate corresponds to the virtual position of the back door inner plate, and two ends of the lower window frame reinforcing plate are respectively welded and fixed with the lower window frame connecting plates at two sides, so that the lower window frame reinforcing plate forms a lower window frame of the back door inner plate; the rear back door inner plate sub-assembly is provided with a plurality of supporting beams at the lower position of the lower window frame reinforcing plate, and the top ends of the supporting beams are welded and fixed with the lower window frame reinforcing plate; the top end of the lower window frame reinforcing plate is welded and fixed with the top end of the lower window frame of the back door outer plate.)

1. A back door of an automobile comprises a back door inner plate, a back door outer plate and lower window frame reinforcing plates positioned between the back door inner plate and the back door outer plate, and is characterized in that the back door inner plate is integrally formed by a back door inner plate sub-assembly at the lower part, an upper window frame at the upper part, side window frames at two sides of the upper part and lower window frame connecting plates at two sides, and a virtual position corresponding to the position of the lower window frame is formed between the lower window frame connecting plates at the two sides; the rear back door outer plate is provided with an upper window frame, a side window frame and a lower window frame; the lower window frame reinforcing plate is provided with a wiper motor mounting hole, the lower window frame reinforcing plate corresponds to the virtual position of the back door inner plate, and two ends of the lower window frame reinforcing plate are respectively welded and fixed with the lower window frame connecting plates at two sides, so that the lower window frame reinforcing plate forms a lower window frame of the back door inner plate; the rear back door inner plate sub-assembly is provided with a plurality of supporting beams at the lower position of the lower window frame reinforcing plate, and the top ends of the supporting beams are welded and fixed with the lower window frame reinforcing plate; the top end of the lower window frame reinforcing plate is welded and fixed with the top end of the lower window frame of the back door outer plate, the back door inner plate sub-assembly is welded with the back door outer plate, and the periphery of the back door inner plate sub-assembly is connected with the back door outer plate through edge covering.

2. The automotive back door of claim 1, wherein the support beam is located below a wiper motor mounting hole.

3. The automotive back door of claim 1, wherein the lower frame stiffener is provided with a boss corresponding to a wiper motor mounting hole.

4. The automobile back door as claimed in claim 1, wherein the side portions of the lower sash reinforcing plate and the lower sash connecting plate of the corresponding side are provided with positioning holes in corresponding positions.

5. The back door as claimed in claim 1, wherein a horizontal beam is provided at a central portion of the back door inner panel subassembly, and a plurality of upper lightening holes and a plurality of lower lightening holes are provided at upper and lower sides of the horizontal beam, bottom ends of the support beams are integrally connected to the horizontal beam, the upper lightening holes are provided between the support beams, and junctions of adjacent lower lightening holes are offset from the support beams.

6. The automobile back door as claimed in claim 1, wherein the lower end of the lower frame reinforcing plate is provided with a plurality of glue coating grooves, and the lower end of the lower frame reinforcing plate is fixed to the lower frame end of the back door outer plate by glue.

7. The back door of claim 6, wherein the frame reinforcing plate has a strip-shaped plate-like structure with a cross-section of a shape like a Chinese character 'ji', and the frame reinforcing plate and the lower frame of the outer panel of the back door form a cavity structure.

Technical Field

The invention belongs to the technical field of automobile structures, and particularly relates to an automobile back door.

Background

The lower window frame of the automobile back door needs to be provided with a wiper motor, the requirement on the rigidity modal performance is high, the lower window frame of the inner plate of the traditional automobile back door and the inner plate of the back door plate are integrally formed by stamping, and the back door inner plate is easy to crack when being formed by adopting an integral structure because the modeling X of the back door outer plate is deeper towards the integral depth; the lower position of the lower window frame is provided with lightening holes for lightening, so that the requirements of supporting strength and rigidity mode are difficult to meet, and the lower window frame is easy to crack due to insufficient strength in the using process, thereby causing troubles and economic loss for users and greatly influencing the safety of automobiles.

Disclosure of Invention

The invention aims to provide an automobile back door with a higher structural strength at a window frame.

The automobile back door is composed of a back door inner plate, a back door outer plate and lower window frame reinforcing plates positioned between the back door inner plate and the back door outer plate, and is characterized in that the back door inner plate is integrally composed of a back door inner plate sub-assembly at the lower part, an upper window frame at the upper part, side window frames at two sides of the upper part and lower window frame connecting plates at two sides, and a virtual position corresponding to the position of the lower window frame is formed between the lower window frame connecting plates at two sides; the rear back door outer plate is provided with an upper window frame, a side window frame and a lower window frame; the lower window frame reinforcing plate is provided with a wiper motor mounting hole, the lower window frame reinforcing plate corresponds to the virtual position of the back door inner plate, and two ends of the lower window frame reinforcing plate are respectively welded and fixed with the lower window frame connecting plates at two sides, so that the lower window frame reinforcing plate forms a lower window frame of the back door inner plate; the rear back door inner plate sub-assembly is provided with a plurality of supporting beams at the lower position of the lower window frame reinforcing plate, and the top ends of the supporting beams are welded and fixed with the lower window frame reinforcing plate; the top end of the lower window frame reinforcing plate is welded and fixed with the top end of the lower window frame of the back door outer plate.

Different from the traditional back door inner plate structure, the back door inner plate does not integrally stamp to form the lower window frame, but forms a virtual position at the position corresponding to the lower window frame, and is connected with the back door inner plate by the other lower window frame reinforcing plate to form the lower window frame, so that the material, the thickness and the like of the lower window frame can be different from those of the back door inner plate, and people can use a material with higher strength to manufacture the lower window frame, thereby greatly improving the structural strength of the lower window frame and reducing the possibility of cracking; meanwhile, the drawing pressure on the two sides of the inner plate of the back door during stamping is reduced, so that the integrity, accuracy and strength of the forming of the two sides of the inner plate of the back door are ensured, and the back door is not easy to crack; in addition, the connection strength and rigidity mode of the lower window frame reinforcing plate and the inner back door plate can be improved through the lower window frame connecting plate, the supporting beam and other structures, and therefore the requirement for the installation strength of the wiper motor is met. The lower window frame reinforcing plate and the back door inner plate are respectively and fixedly connected with the back door outer plate, and the overall strength and the rigidity mode of the back door can also be improved.

Furthermore, the supporting beam is positioned below the wiper motor mounting hole, so that the lower window frame reinforcing plate has higher strength at the position corresponding to the wiper motor mounting hole, and the requirement on the mounting strength of the wiper motor is met.

Furthermore, the lower window frame reinforcing plate is provided with a boss corresponding to the mounting hole of the wiper motor so as to improve the strength of the mounting hole of the wiper motor.

Furthermore, the side part of the lower window frame reinforcing plate and the lower window frame connecting plate of the corresponding side are provided with positioning holes corresponding in position, so that the lower window frame reinforcing plate can be conveniently installed and positioned, and the accuracy of the installation position of the lower window frame reinforcing plate is ensured.

Furthermore, a horizontal beam is arranged in the middle of the inner plate sub-assembly of the back door, a plurality of upper lightening holes and a plurality of lower lightening holes are arranged on the upper side and the lower side of the horizontal beam, the bottom end of the supporting beam is integrally connected with the horizontal beam, the upper lightening holes are positioned between the supporting beams, and the joint of the adjacent lower lightening holes is staggered with the supporting beams. Above-mentioned lightening hole can alleviate the whole weight of back door inner panel greatly, simultaneously through the structural design of horizontal beam and supporting beam, has avoided because the weakening of the lower window frame support intensity that the lightening hole leads to.

Further, the bottom of lower window frame reinforcing plate is equipped with a plurality of rubber coating grooves, the bottom of lower window frame reinforcing plate is fixed through the viscose with the lower window frame bottom of back door outer plate, and the upper and lower both sides of lower window frame reinforcing plate all with back door outer plate fixed connection like this, have further promoted the rigidity modal performance of back door.

Furthermore, the window frame reinforcing plate is a strip-shaped plate-shaped structure with a cross section in a shape like a Chinese character 'ji', and the window frame reinforcing plate and the lower window frame of the outer plate of the back door form a cavity structure, so that the overall rigidity modal performance of the back door is further improved, and the performance target requirement is met.

According to the invention, by improving the structure of the inner plate of the back door and additionally arranging the lower window frame reinforcing plate which is manufactured separately from the inner plate of the back door, the structural strength of the lower window frame of the back door can be greatly improved, the requirement on the front degree of the mounting point of the wiper motor is met, and the problem of punch forming and cracking of the inner plate of the back door is solved. The lower window frame reinforcing plate is respectively and fixedly connected with the back door inner plate and the back door outer plate, so that the performance of the back door in the modes of concavity resistance and integral rigidity is greatly improved.

Drawings

Fig. 1 is a schematic structural view of a lower sash reinforcing plate according to the present invention.

Fig. 2 is a schematic view of a connection structure of the back door inner panel and the lower sash reinforcing panel according to the present invention.

Fig. 3 is a schematic structural view of the back door of the present invention.

The labels in the above figures are: 1. a back door inner panel; 11. the back door inner plate sub-assembly; 12. a lower window frame connecting plate; 13. a support beam; 14. a horizontal beam; 15. an upper lightening hole; 16. a lower lightening hole; 17. welding spots; 2. a rear door outer panel; 21. welding spots; 3. a lower window frame reinforcing plate; 31. a wiper motor mounting hole; 32. positioning holes; 33. gluing a slot; 34. and (7) welding points.

Detailed Description

The following describes embodiments of the present invention, such as shapes and structures of respective members, mutual positions and connection relationships between respective portions, and actions and operation principles of the respective portions, in further detail, with reference to the accompanying drawings.