Scissor door hinge assembly tool and assembly method thereof

Abstract

The invention relates to a scissor door hinge assembly tool. The scissor door hinge assembly tool comprises a fixed support; the fixing assembly is arranged on the fixing support, and the fixing assembly is used for being connected with a vehicle door positioning hole; the vehicle door positioning assemblies comprise vehicle door clamping pieces and vehicle door supporting pieces, the vehicle door clamping pieces and the vehicle door supporting pieces are arranged on the fixing support, the vehicle door clamping pieces are used for being connected with a vehicle door inner plate, and the lengths of the vehicle door supporting pieces in the vehicle width direction are consistent. The hinge positioning assemblies comprise hinge clamping pieces and hinge supporting pieces, the hinge clamping pieces and the hinge supporting pieces are arranged on the fixing support, the hinge clamping pieces are used for being connected with vehicle door hinges, and the lengths of the hinge supporting pieces in the vehicle width direction are consistent. The problems that time and labor are consumed when a scissor door is manually assembled in the prior art, and positioning deviation is easily caused by insufficient matching precision of via holes between a hinge and the scissor door are solved.

Description

Technical Field

[0001] The present application relates to the field of vehicle body installation, and in particular to a scissor door hinge assembly tool and an assembly method thereof. Background Art

[0002] Scissor doors, with their unique opening method and technological design, have become a key selling point for sports cars and high-end models. Therefore, during actual vehicle production, it is crucial to ensure that the clearance and surface difference between the scissor doors and the body meet standard tolerances when installing them, enhancing the overall vehicle's refined feel.

[0003] When actually installing the scissor door on the car body, it is necessary to use hinges to connect the scissor door and the car body. While ensuring the surface difference between the scissor door and the car body, it is also necessary to pay attention to the scissor door hinge structure to meet the large-angle opening and closing requirements. Therefore, when installing the scissor door, the first thing you need to pay attention to is the installation accuracy between the hinge and the scissor door.

[0004] At present, the assembly of scissor doors and hinges still relies on manual operation, and manual assembly based on experience requires repeated adjustments, which is not only time-consuming and labor-intensive, but also prone to positioning deviations due to insufficient precision in the through-hole fit between the hinges and the scissor doors. This can cause damage to the scissor doors and surrounding parts of the vehicle body, such as the rear door, glass, and B-pillar trim, increasing the time required for rework and even the risk of scrapping parts. Summary of the Invention

[0005] The embodiment of the present application provides a scissor door hinge assembly tool and an assembly method thereof to solve the problem in the related art that manual assembly of scissor doors is not only time-consuming and labor-intensive, but also prone to positioning deviations due to insufficient precision of the through-hole fit between the hinge and the scissor door.

[0006] In a first aspect, the present application provides a scissor door hinge assembly tool, which includes: A fixing bracket, wherein an assembly reference surface is formed on one end surface of the fixing bracket; A fixing component, the fixing component is arranged on the fixing bracket assembly reference surface, and the fixing component is used to connect to the door positioning hole; a plurality of door positioning assemblies, each comprising a door clamping member and a door support member disposed on the assembly reference surface of the fixing bracket, the door clamping member being used to connect to the door inner panel, the plurality of door support members being parallel to each other in the vehicle width direction, and the plurality of door support members being abutted against the door body at one end away from the fixing bracket so that the door body is located at a designed assembly surface of the door, the designed assembly surface of the door being parallel to the assembly reference surface; And, several hinge positioning assemblies, the hinge positioning assemblies include hinge clamping members and hinge support members arranged on the assembly reference surface of the fixed bracket, the hinge clamping members are used to connect the door hinges, several of the hinge support members are parallel to each other in the vehicle width direction, and the ends of several of the hinge support members away from the fixed bracket are all in contact with the hinge body, so that the hinge body is located on the hinge design assembly surface, and the hinge design assembly surface is parallel to the assembly reference surface.

[0007] In conjunction with the first aspect, in one embodiment, the fixing assembly includes: a first positioning pin, the first positioning pin being arranged on the top of the fixing bracket; And, a second positioning pin, the second positioning pin is arranged on the fixing bracket along the vehicle length direction and is spaced apart from the first positioning pin, and the second positioning pin is arranged higher than the first positioning pin.

[0008] In conjunction with the first aspect, in one embodiment, the hinge positioning assembly includes: a first hinge positioning group, the first hinge positioning group including a first hinge clamping member and a first hinge support member, the first hinge positioning group being used to define a distance between the hinge body and the fixing bracket in a vehicle width direction; And, a second hinge positioning group, the second hinge positioning group includes a second hinge clamping member and a second hinge support member arranged on the fixed bracket at intervals along the vehicle height direction, and the second hinge positioning group is used to limit the position of the hinge relative to the door body in the vehicle height direction.

[0009] In combination with the first aspect, in one embodiment, the vehicle door positioning components are specifically provided in four groups, and the four groups of vehicle door positioning components are respectively provided at the corners of the fixing bracket.

[0010] In combination with the first aspect, in one embodiment, the fixing bracket includes: A fixed frame, on which the door positioning assembly and the hinge positioning assembly are both arranged; And, a support base, wherein the support base is arranged at the bottom of the fixed frame.

[0011] In conjunction with the first aspect, in one embodiment, a scissor door hinge assembly tool further includes: The inclined bracket is connected to the fixed frame and extends obliquely downward from the fixed frame.

[0012] In conjunction with the first aspect, in one embodiment, a scissor door hinge assembly tool further includes: Reinforcement ribs, the two ends of which are respectively connected to the fixing frame and the support seat In conjunction with the first aspect, in one embodiment, a scissor door hinge assembly tool further includes: The mobile platform is provided with a fixed support and a universal wheel at the bottom of the mobile platform.

[0013] In a second aspect, the present application provides a method for assembling a scissor door hinge, comprising the following steps: Installing the vehicle door body with the hinge body pre-installed on any one of the above-mentioned scissor door hinge assembly tools; connecting the fixing assembly to the door body; Tighten the door clamping parts and make the end faces of several door support parts abut against the door body; Tighten the hinge clamping piece and make the end faces of the hinge support pieces contact the hinge body; Tighten the bolts between the hinge body and the door body.

[0014] In conjunction with the second aspect, in one embodiment, a scissor door hinge assembly method further includes: Install the door body with the hinge body to the vehicle body, and check the gap and flushness between the door body and the environmental parts.

[0015] The beneficial effects brought about by the technical solution provided by the present application include: fixing the vehicle door to the fixed bracket through the fixing component to provide a stable assembly position for the vehicle door; using the vehicle door positioning component, using the end faces of several vehicle door support members to abut against the vehicle door body, so that the surface opposite to the vehicle door body and the fixed bracket is parallel, so as to establish the installation plane of the vehicle door body; finally, using several hinge support members in the hinge positioning component to abut against the hinge body to keep the installation surface of the hinge body flush, reducing the possibility of tilting of the hinge body during installation, and using assembly tooling to assist in the installation and fixation between the hinge body and the vehicle door body, thereby improving the installation accuracy, and solving the problem in the related art that manual assembly of scissor doors is not only time-consuming and labor-intensive, but also prone to positioning deviations due to insufficient precision of the through-hole matching between the hinge and the scissor door.

[0016] An embodiment of the present application provides a scissor door hinge assembly tool and an assembly method thereof. Since the fixed bracket can provide an assembly station for the vehicle door body and the hinge body, and then the vehicle door body and the hinge body are parallel to the plane between the fixed bracket are achieved through the vehicle door positioning component and the hinge positioning component, the assembly accuracy between the hinge and the vehicle door is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0018] Figure 1 A scissor door hinge assembly tool provided in an embodiment of the present application; Figure 2 for Figure 1 Schematic diagram of the structure of area A; Figure 3 for Figure 1 Schematic diagram of the structure of area B in the middle; Figure 4 A schematic diagram of the structure of the hinge body being pre-installed on the door body; Figure 5 A schematic diagram of the door body and hinge body being installed on the scissor door hinge assembly tool; In the figure: 1. Fixed bracket; 11. Fixed frame; 12. Support seat; 13. Tilting bracket; 14. Reinforcement rib; 15. Mobile platform; 151. Universal wheel; 2. Fixed assembly; 21. First positioning pin; 22. Second positioning pin; 3. Door positioning assembly; 31. Door clamping member; 32. Door support member; 4. Hinge positioning assembly; 41. First hinge clamping member; 42. First hinge support member; 43. Second hinge clamping member; 44. Second hinge support member; 5. Door body; 6. Hinge body. DETAILED DESCRIPTION

[0019] To make the purpose, technical solutions, and advantages of the embodiments of this application more clear, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the drawings in the embodiments of this application. Obviously, the described embodiments are part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0020] The embodiment of the present application provides a scissor door hinge assembly tool and an assembly method thereof, which can solve the problem in the related art that manual assembly of scissor doors is not only time-consuming and labor-intensive, but also prone to positioning deviations due to insufficient precision of the through-hole fit between the hinge and the scissor door.

[0021] Reference Figure 1-Figure 3The present application discloses a scissor door hinge assembly tool, which includes a fixing bracket 1, a fixing component 2, a plurality of door positioning components 3 and a plurality of hinge positioning components 4. An assembly reference surface is formed on one end surface of the fixing bracket 1 to provide an assembly and installation surface for the door body 5 and the hinge body 6 in the vertical direction. The fixing component 2 is arranged on the fixing bracket 1, and the fixing component 2 is used to connect the door positioning hole on the door body 5 so that the door body 5 can be stably installed on the fixing bracket 1; the door positioning component 3 includes a door clamping member 31 and a door support member 32 arranged on the fixing bracket 1, and the ends of the plurality of door supports 32 away from the fixing bracket 1 are all in contact with the door body 5, so that when the operator positions the door body 5, the plurality of door supports 32 are in contact with the inner panel of the door body 5 to fine-tune the door body 5 to the designed assembly surface of the door. Since the designed assembly surface of the door is parallel to the assembly reference surface, the door clamping member 31 is used to clamp the abutting points of each door body 5 to achieve the reference positioning of the door body 5. Then adjust several hinge support parts to abut against the hinge body 6, fine-tune the position of the hinge body 6, and then clamp the hinge body 6 with the hinge clamping parts so that the hinge body 6 is located on the hinge design assembly surface parallel to the assembly reference surface, and then make the hinge design assembly surface and the door design assembly surface parallel to each other. Finally, tighten the connecting bolts between the hinge body 6 and the door body 5 to achieve the positioning connection between the hinge body 6 and the door body 5, thereby improving the installation accuracy of the hinge body 6 and the door body 5.

[0022] The fixing bracket 1 comprises a fixing frame 11 and a support base 12. The fixing frame 11 is a hollowed-out steel structure. The hollowed-out holes in the fixing frame 11 allow the operator to observe whether the door body 5 and hinge body 6 are in contact with their corresponding door supports 32 and hinge support end faces. The operator can also insert their hand through the hollowed-out holes in the fixing frame 11 to tighten the bolts, door clamps 31, and hinge clamps. The support base 12 is integrally welded to the bottom of the fixing frame 11 to better support the fixing frame 11 and provide a more stable assembly station for the door body 5 and hinge body 6. This allows the fixing frame 11 to simulate the body of the scissor door to be installed. Furthermore, reinforcing ribs 14 are welded between the fixing frame 11 and the support base 12 to further enhance the support strength of the support base 12 and reduce the possibility of shaking of the fixing frame 11 during assembly between the hinge body 6 and the door body 5.

[0023] More specifically, because the inner panel surface of the door body 5 facing the fixed frame 11 is an uneven, profiled surface, to assist the operator in quickly fine-tuning the door body 5 and reduce the possibility of a side of the door body 5 becoming skewed, the length of each door support member 32 in the vehicle width direction is set based on the actual dimensions of the inner panel surface of the door body 5. This ensures that when each door support member 32 abuts the inner panel surface of the door body 5, the door body 5 lies on the designed door assembly surface parallel to the assembly reference plane, thereby assisting in positioning the door body 5. Similarly, because the surface of the hinge body 6 facing the fixed frame 11 is also an uneven, profiled surface, the lengths of the various hinge support members are also designed based on the actual dimensions of the hinge body 6. This ensures that when the various hinge support members simultaneously abut the hinge body 6, the hinge body 6 lies on the designed hinge assembly surface parallel to the assembly reference plane.

[0024] The fixing assembly 2 includes a first locating pin 21 and a second locating pin 22. The first locating pin 21 is disposed at the top of the fixing frame 11. The second locating pin 22 is disposed on the fixing frame 11 at intervals from the first locating pin 21 along the parking lot direction. The second locating pin 22 is disposed higher than the first locating pin 21, so that the first locating pin 21 and the second locating pin 22 respectively connect to the lower door locating hole and the upper door locating hole on the door body 5. When actually installing the door body 5 to the fixing frame 11, the first locating pin 21 is first connected to the door locating hole to secure the door body 5 to the fixing bracket 1. The second locating pin 22 is then connected to another door locating hole on the door body 5, thereby restricting the axial rotation of the door body 5 about the first locating pin 21, allowing the door body 5 to be stably fixed to the fixing bracket 1. The specific distance between the first locating pin 21 and the second locating pin 22 can be set according to the spacing between the door mounting holes on the door body 5 of the actual vehicle model to facilitate installation of the door body 5.

[0025] Specifically, four sets of door positioning assemblies 3 are provided. The four sets of door positioning assemblies 3 are respectively connected to the corners of the fixed frame 11 by bolts to better connect the door body 5 to the fixed frame 11. In other embodiments, the number of door positioning assemblies 3 can also be changed according to actual needs to facilitate the operation of the operator.

[0026] The hinge positioning assembly 4 includes a first hinge positioning group and a second hinge positioning group. The first hinge positioning group includes a first hinge clamping member 41 and a first hinge support member 42. The first hinge positioning group is used to limit the distance between the hinge body 6 and the fixed frame 11 in the vehicle width direction; the second hinge positioning group includes a second hinge clamping member 43 and a second hinge support member 44 arranged on the fixed frame 11 at intervals along the vehicle height direction. The second hinge positioning group is used to limit the position of the hinge body 6 relative to the door body 5 in the vehicle height direction.

[0027] In the actual manufacturing process, there are specifically two groups of first hinge positioning groups, and the two groups of first hinge positioning groups are fixed on the fixed frame 11 at intervals along the vehicle height direction. Several first hinge support members 42 are parallel to each other in the vehicle width direction, and when the first hinge support members 42 are all in contact with the hinge body 6, the hinge body 6 is located on the hinge design assembly surface parallel to the assembly reference plane, so that the hinge body 6 and the door body 5 are parallel to each other; the distance between the second hinge clamping member 43 and the second hinge support member 44 is set according to the hinge assembly height of the specific vehicle model, so that the hinge clamping member clamps the hinge body 6 while the hinge support member is in contact with the hinge body 6, thereby completing the positioning of the hinge body 6 in the vehicle height direction.

[0028] Furthermore, since the overall mass of the door body 5 and the hinge body 6 is relatively high when they are assembled on the fixed frame 11 at the same time, in order to further improve the strength of the fixed bracket 1, an inclined bracket 13 is also welded on the fixed frame 11. The inclined bracket 13 is specifically arranged on the end surface of the fixed frame 11 where the fixing component 2, the door positioning component 3 and the hinge positioning component 4 are not welded. One end of the inclined bracket 13 is connected to the fixed frame 11, and the other end extends obliquely downward from the fixed frame 11 to support the fixed frame 11.

[0029] Since the scissor door hinge assembly tooling needs to be transported to the warehouse for storage after the assembly is completed, a mobile platform 15 is also provided to facilitate the movement of the scissor door hinge assembly tooling. In one embodiment of the present application, the support seat 12 is fixed to the mobile platform 15 by bolts, and a universal wheel 151 is also installed at the bottom of the mobile platform 15 to facilitate the operator to transport the scissor door hinge assembly tooling through the mobile platform 15.

[0030] Based on the above-mentioned scissor door hinge assembly tool, the present application also proposes a scissor door hinge assembly method, which specifically includes the following steps: S1: Installing the vehicle door body 5 with the hinge body 6 pre-installed on the above-mentioned scissor door hinge assembly tool; Reference Figure 4-Figure 5 When pre-installing the hinge body 6 to the door body 5, the bolts between the hinge body 6 and the door body 5 are in an untightened state. Pre-installation facilitates fixing the approximate installation position of the hinge body 6, so that the hinge body 6 and the door body 5 can be installed as a whole on the scissor door hinge assembly station.

[0031] S2: Connect the fixing component 2 and the door body 5; Specifically, the first locating pin 21 and the second locating pin 22 are respectively connected to the door locating holes on the door body 5 to achieve fixed installation of the door body 5. The first locating pin 21 can fix the door body 5, and the second locating pin 22 is used to limit the rotation of the door body 5 around the axis of the first locating pin 21 to achieve fixed installation of the door body 5.

[0032] S3: Tighten the door clamping member 31 and make the end surfaces of the door support members 32 fit with the door body 5; By abutting the ends of several door supports 32 against the inner panel surface of the door body 5, the door body 5 is fine-tuned in the vertical direction and is located on a door design assembly surface parallel to the assembly reference surface, thereby improving subsequent assembly accuracy.

[0033] S4: Tighten the hinge clamping piece and make the end faces of the hinge support pieces fit with the hinge body 6; By abutting the hinge body 6 with the first hinge support 42 and the second hinge support 44, the hinge body 6 is located on a hinge design assembly surface that is parallel to the assembly reference surface, thereby achieving parallelism between the hinge design assembly surface and the vehicle door design assembly surface, thereby improving the installation accuracy of the hinge body 6 during the subsequent assembly and tightening process.

[0034] S5: Tighten the bolts between the hinge body 6 and the door body 5.

[0035] S6: Install the door body 5 with the hinge body 6 to the vehicle body, and check the clearance and surface difference between the door body 5 and the environmental parts.

[0036] The actual gap and actual face difference between the door body 5 and the vehicle body environmental parts are measured. If the measured actual gap and actual face difference are both within their corresponding design tolerance ranges, the assembly accuracy between the hinge body 6 and the door body 5 is qualified. If one of the actual gap and actual face difference is outside its corresponding design tolerance range, whether it is greater or less than it, it is unqualified. At this time, the above steps 1-5 need to be repeated for secondary assembly until the actual gap and actual face difference between the door body 5 and the vehicle body environmental parts are within their corresponding design tolerance ranges.

[0037] In the description of this application, it should be noted that the terms "upper" and "lower" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application. Unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be internal communication between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0038] It should be noted that, in this application, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any 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 comprising 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. In the absence of further restrictions, an element defined by the sentence "comprising a ..." does not exclude the presence of other identical elements in the process, method, article or device comprising the element.

[0039] The foregoing is merely a list of specific embodiments of the present application, intended to enable those skilled in the art to understand or implement the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application is not limited to the embodiments shown herein, but is intended to conform to the broadest scope consistent with the principles and novel features of the present application.

Claims

1. A scissor door hinge assembly tool, characterized in that: It includes: A fixed bracket (1), wherein an assembly reference surface is formed on one end surface of the fixed bracket (1); A fixing component (2), the fixing component (2) being arranged on an assembly reference surface of the fixing bracket (1), the fixing component (2) being used for connecting to a door positioning hole; A plurality of door positioning assemblies (3), the door positioning assemblies (3) comprising a door clamping member (31) and a door support member (32) arranged on an assembly reference surface of the fixing bracket (1), the door clamping member (31) being used to connect the door inner panel, the plurality of door support members (32) being parallel to each other in a vehicle width direction, and the ends of the plurality of door support members (32) away from the fixing bracket (1) being in contact with the door body (5), so that the door body (5) is located on a door design assembly surface, and the door design assembly surface is parallel to the assembly reference surface; And, a plurality of hinge positioning components (4), the hinge positioning components (4) comprising a hinge clamping member and a hinge support member arranged on the assembly reference surface of the fixing bracket (1), the hinge clamping member being used to connect the door hinge, the plurality of hinge support members being parallel to each other in the vehicle width direction, and the ends of the plurality of hinge support members away from the fixing bracket (1) being in contact with the hinge body (6), so that the hinge body (6) is located on the hinge design assembly surface, and the hinge design assembly surface is parallel to the assembly reference surface.

2. The scissor door hinge assembly tool according to claim 1, characterized in that: The fixing assembly (2) comprises: A first positioning pin (21), the first positioning pin (21) being arranged on the top of the fixing bracket (1); and a second positioning pin (22), the second positioning pin (22) being arranged on the fixing bracket (1) along the vehicle length direction at a distance from the first positioning pin (21), and the second positioning pin (22) being arranged higher than the first positioning pin (21).

3. The scissor door hinge assembly tool according to claim 1, characterized in that: The hinge positioning assembly (4) comprises: a first hinge positioning group, the first hinge positioning group comprising a first hinge clamping member (41) and a first hinge support member (42), the first hinge positioning group being used to define a distance between the hinge body (6) and the fixing bracket (1) in a vehicle width direction; and a second hinge positioning group, the second hinge positioning group comprising a second hinge clamping member (43) and a second hinge supporting member (44) spaced apart on the fixing bracket (1) along the vehicle height direction, the second hinge positioning group being used to limit the position of the hinge relative to the vehicle door body (5) in the vehicle height direction.

4. The scissor door hinge assembly tool according to claim 1, characterized in that: The vehicle door positioning components (3) are specifically provided in four groups, and the four groups of vehicle door positioning components (3) are respectively provided at the corners of the fixing bracket (1).

5. The scissor door hinge assembly tool according to claim 1, characterized in that: The fixing bracket (1) comprises: A fixed frame (11), the door positioning assembly (3) and the hinge positioning assembly (4) are both arranged on the fixed frame (11); And, a support seat (12), wherein the support seat (12) is arranged at the bottom of the fixed frame (11).

6. The scissor door hinge assembly tool according to claim 5, characterized in that: Also includes: An inclined bracket (13), the inclined bracket (13) is connected to the fixed frame (11), and the inclined bracket (13) extends obliquely downward from the fixed frame (11).

7. The scissor door hinge assembly tool according to claim 5, characterized in that: Also includes: A reinforcing rib (14), wherein two ends of the reinforcing rib (14) are respectively connected to the fixing frame (11) and the supporting seat (12).

8. The scissor door hinge assembly tool according to claim 1, characterized in that: Also includes: A mobile platform (15), wherein the fixed bracket (1) is arranged on the mobile platform (15), and a universal wheel (151) is arranged at the bottom of the mobile platform (15).

9. A method for assembling a scissor door hinge, characterized in that: The following steps are involved: Installing the vehicle door body (5) pre-installed with the hinge body (6) onto the scissor door hinge assembly tool according to any one of claims 1 to 8; Connecting the fixing assembly (2) and the vehicle door body (5); Tighten the door clamping member (31) and make the end faces of the plurality of door support members (32) abut against the door body (5); Tighten the hinge clamping member and make the end faces of the hinge support members abut against the hinge body (6); Tighten the bolts between the hinge body (6) and the door body (5).

10. The scissor door hinge assembly method according to claim 1, characterized in that: Also includes: Install the door body (5) with the hinge body (6) to the vehicle body, and check the clearance difference between the door body (5) and the environmental part.

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