CN115257939B - Front end frame assembly method and front end frame - Google Patents

Abstract

The invention relates to the field of automotive technology, and in particular to a front-end frame assembly method and a front-end frame. The front-end frame assembly method provided by this application includes the following steps: S1: Install the column according to the vehicle positioning datum; S2: Fixedly set the positioning piece on the top of the column according to the whole vehicle positioning datum, so that the position of the positioning piece matches the designed position. The positions match, and the upper cross beam and the upright column are positioned through the positioning member; S3: fixedly connect the upper cross beam and the upright column, and the assembly of the front end frame is completed. The front-end frame assembly method and front-end frame provided by this application ensure the positional installation accuracy of the upper beam, thereby ensuring the gaps and step differences between the front face hood, front skin, and headlights of the entire vehicle. Improved the dimensional accuracy and static perception quality of the entire vehicle.

Description

Front-end frame assembly method and front-end frame

Technical field

The invention relates to the field of automotive technology, and in particular to a front-end frame assembly method and a front-end frame.

Background technique

The front-end frame of the vehicle includes a left upright, a right upright, an upper crossbeam and a lower crossbeam. The left upright is set on the side of the left longitudinal beam of the car, the right upright is set on the side of the right longitudinal beam of the car, and the upper crossbeam is set on the left upright and the lower crossbeam. between the tops of the right upright columns, and the lower beam is set between the bottoms of the left upright column and the right upright column.

During the assembly process of the front-end frame, the uprights are usually assembled to the longitudinal beams first, and then the upper cross beams and lower cross beams are assembled to the uprights respectively. However, during the assembly process of the longitudinal beams, the left and right front longitudinal beams often show an "open" state, that is, the Y-direction dimensions of the left and right front longitudinal beams deviate from the vehicle positioning datum, resulting in the left and right uprights, the upper . Deviations in the assembly dimensions of the lower crossmember, especially those of the upper crossmember, will cause positional deviations in the positions of the headlights, front skin, and hood locks, thus affecting the gap between the front face of the vehicle. The accuracy of the step difference value will affect the perceived quality of the front face of the vehicle.

Contents of the invention

This application provides a front-end frame assembly method and front-end frame, which solves the problem in related technologies that the Y-direction dimensions of the left and right front longitudinal beams deviate during the assembly process, resulting in problems with headlights, front skins, and hood locks. There are positional deviations in all positions, which affects the accuracy of the gap segment difference between the front face of the vehicle and the perceived quality of the front face of the vehicle.

On the one hand, the present application provides a front-end frame assembly method. The front-end frame includes an upper beam and two columns connected to both ends of the upper beam. It is characterized in that the front-end frame assembly method includes the following steps:

S1: Install the column according to the vehicle positioning benchmark;

S2: Fixedly set a positioning piece on the top of the column according to the vehicle positioning reference, so that the position of the positioning piece matches the designed positioning position, and position the upper beam and the column through the positioning piece;

S3: Fixedly connect the upper beam and the upright column, and the assembly of the front-end frame is completed.

In some embodiments, the positioning member includes a threaded positioning bolt and a floating nut. In step S2, the positioning member is fixedly installed on the top of the column according to the vehicle positioning reference, which specifically includes:

S21: Move the positioning piece to the designed positioning position according to the vehicle positioning reference;

S22: Lock the positioning bolt to the designed positioning position through the floating nut.

In some embodiments, the upper beam is provided with positioning holes. In step S2, positioning the upper beam and the column through the positioning member specifically includes:

Move the upper beam to a position where the positioning bolt is inserted into the positioning hole to position the upper beam and the upright column.

In some embodiments, in step S3, the upper beam and the upright column are fixedly connected, specifically including:

The upper beam and the upright column are fixedly connected through connecting bolts.

On the other hand, the present application also provides a front-end frame for implementing the above-mentioned front-end frame assembly method, including: an upper beam and two uprights connected to both ends of the upper beam. The tops of the uprights are detachably provided with positioning When the positioning part is fixedly connected to the upright column, the position of the positioning part matches the designed positioning position to position the upper beam.

In some embodiments, the positioning member includes a threaded positioning bolt and a floating nut, a first through hole is provided on the top of the column, and the positioning bolt is movably disposed in the first through hole. The floating nut is operable to lock the positioning bolt.

In some embodiments, the positioning member further includes a floating nut box. The floating nut box is located at the top of the inner wall of the column. The floating nut box is provided with a second through hole. The floating nut can be movable. Located in the floating nut box, the positioning bolt includes a head and a screw part connected to the head, and the screw part is passed through the first through hole and the second through hole and the first through hole and the second through hole. The floating nut connection;

Wherein, when the head is in the first position, the floating nut is movable in the floating nut box, and the screw part is movable in the first through hole. When the head is in the second position, , the head is in conflict with the top of the upright column, and the floating nut is in conflict with the top wall of the floating nut box.

In some embodiments, the bottom of the floating nut box is provided with a limiting hole, and the floating nut includes:

A nut body, the screw part is connected to the nut body, the nut body is movably arranged in the limiting hole, and the nut body is connected to the limiting plate;

A limiting plate is connected to the nut body, and the limiting plate is clamped in the floating nut box.

In some embodiments, the front-end frame further includes a connecting component disposed on the upright column. The connecting component includes a connecting nut and a connecting bolt. The connecting nut is disposed on the top of the inner wall of the upright column. The connecting component One end of the bolt is screwed into the screw hole of the corresponding connecting nut, and the other end is screwed into the corresponding end of the upper beam. The connecting bolt is arranged on one side of the first through hole.

In some embodiments, the upper beam is provided with positioning holes corresponding to the positioning bolts of the two upright columns, and the inner ring of one of the positioning holes is in contact with the outer ring of the corresponding positioning bolt. In cooperation with the arrangement, the size of the other positioning hole is larger than the size of the corresponding positioning bolt.

The beneficial effects of this application are as follows:

This application provides a front-end frame assembly method and front-end frame. Since a positioning piece is fixedly installed on the top of the column according to the vehicle positioning reference, the position of the positioning piece coincides with the designed positioning position, and the upper beam and the column are passed through the positioning piece. Positioning, after the upper crossbeam is positioned, the upper crossbeam and the column are fixedly connected. Therefore, the installation of the upper crossbeam avoids the position deviation caused by the longitudinal beam, ensuring the positional installation accuracy of the upper crossbeam, thereby ensuring the front face of the vehicle. The gaps and step differences between the hood, front skin, and headlights improve the dimensional accuracy and static perception quality of the entire vehicle.

Description of the drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only illustrative of the present invention. Some examples.

Figure 1 is a schematic structural diagram of the front-end framework provided in this embodiment;

Figure 2 is a partial exploded view of Figure 1;

Figure 3 is an internal structural diagram of the column in Figure 2;

Figure 4 is the partial exploded view 2 in Figure 1;

Explanation of reference symbols:

1-left longitudinal beam, 2-right longitudinal beam, 3-column, 31-first through hole, 4-upper beam, 41-positioning hole, 5-lower beam, 100-positioning unit, 110-positioning piece, 120- Fastening component, 121-Floating nut, 1211-Nut body, 1212-Limiting plate, 122-Floating nut box, 200-Connecting component, 210-Connecting nut.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts fall within the scope of protection of the present invention.

It should be noted that all directional indications in the embodiments of the present invention are only used to explain the relative positional relationship, movement, etc. between components in a specific posture. If the specific posture changes, the directional indication will It also changes accordingly.

In the present invention, unless otherwise clearly stated and limited, the terms "connection", "fixing", etc. should be understood in a broad sense. For example, "fixing" can be a fixed connection, a detachable connection, or an integral body; It can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be an internal connection between two elements or an interactive relationship between two elements, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

In addition, descriptions such as "first", "second", etc. in the present invention are for descriptive purposes only and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of indicated technical features.

Therefore, features defined as "first" and "second" may explicitly or implicitly include at least one of these features. In addition, the technical solutions in various embodiments can be combined with each other, but it must be based on the realization by those of ordinary skill in the art. When the combination of technical solutions is contradictory or cannot be realized, it should be considered that such a combination of technical solutions does not exist. , nor within the protection scope required by the present invention.

The present application is described below in conjunction with the accompanying drawings and with reference to specific embodiments:

Figure 1 is a schematic structural diagram of the front-end frame provided in this embodiment, Figure 2 is a partial exploded view of Figure 1, Figure 3 is an internal structural view of the column in Figure 2, and Figure 4 is a partial exploded view of Figure 1; 1-4, the embodiment of the present application provides a front-end frame assembly method. The front-end frame includes an upper beam 4 and two columns 3 connected to both ends of the upper beam 4. The front-end frame assembly method includes the following steps:

S1: Install column 3 according to the vehicle positioning benchmark;

The length direction of the vehicle body is the X direction, the width direction of the vehicle body is the Y direction, and the height direction of the vehicle body is the Z direction. The vehicle positioning datum is the design position of each component of the vehicle body in the XYZ three directions. All components of the car need to be positioned according to the vehicle positioning datum. Assembly to ensure the assembly accuracy of the car.

Since the left longitudinal beam 1 and the right longitudinal beam 2 tend to be in an "open" state during the assembly process, the Y-direction size is too large. At the same time, the Z-direction size of the left longitudinal beam 1 and the right longitudinal beam 2 will also deviate, which will It is in a state of warping up and down. Installing the column 3 according to the vehicle positioning benchmark can accurately locate the Z-direction position of the column 3. However, since the column 3 needs to be closely connected to the connecting end faces of the left longitudinal beam 1 and the right longitudinal beam 2, therefore, It is impossible to accurately locate the XY position of the column 3, that is, the Z-direction size of the column 3 after this step is completed is accurate, thereby ensuring that the subsequent Z-direction size of the upper beam 4 is also accurate, but the XY-direction size is biased.

S2: Fix the positioning piece 110 on the top of the column 3 according to the vehicle positioning reference, so that the position of the positioning piece 110 matches the designed positioning position, and position the upper beam 4 and the column 3 through the positioning piece 110;

The design positioning position of the positioning piece 110 is designed in the vehicle positioning reference. After the upper cross beam 4 and the column 3 are positioned through the positioning piece 110, the XY position of the upper cross beam 4 can be accurately positioned. That is, after the uprights 3 are assembled, the positioning parts 110 are still fixedly set on the uprights 3 with size deviations in the XY direction according to the vehicle positioning reference, and the upper crossbeam 4 is positioned only through the positioning parts 110, so that the assembly of the upper crossbeam 4 It is not affected by the position deviation of the column 3 and ensures the assembly accuracy of the upper beam 4.

S3: Fix the upper beam 4 and the column 3, and the front-end frame is assembled.

After the position between the upper beam 4 and the column 3 is positioned, the upper beam 4 and the column 3 can be fixedly connected to complete the assembly of the front-end frame. Specifically, the upper beam 4 and the column 3 are fixedly connected through connecting bolts.

Furthermore, in step S2, the positioning piece 110 can be set separately from the column 3. That is, after the column 3 is assembled, the positioning piece 110 can be fixedly set on the column 3 according to the vehicle positioning reference; the positioning piece 110 can also be movable itself. It is arranged on the upright column 3. After the upright column 3 is assembled, adjust the position of the positioning member 110 on the upright column 3 to the designed positioning position. Preferably, in order to facilitate operation, the positioning member 110 is movably provided on the upright column 3 in this embodiment.

The fixing method between the positioning part 110 and the upright column 3 can be welded or detachable. Since the welding method is cumbersome and not conducive to operation, in this embodiment, the positioning part 110 and the upright column 3 are detachable. fixed method.

Specifically, in this embodiment, the positioning member 110 includes a threaded positioning bolt and a floating nut 121. In step S2, the positioning member 110 is fixedly installed on the top of the column 3 according to the vehicle positioning reference, which specifically includes:

S21: Move the positioning bolt to the designed positioning position according to the vehicle positioning benchmark;

That is, the positioning bolt itself is movably set on the column 3. The positioning bolt has the designed positioning position in the vehicle positioning datum. When the installation position of the column 3 is accurate, the positioning bolt should also be exactly in the designed positioning position. When the column 3 When the position in the XY direction deviates, the positioning bolt will also deviate from the designed positioning position. At this time, just move the positioning bolt to the designed positioning position.

S22: Lock the positioning bolt to the designed positioning position through the floating nut 121.

The floating nut 121 can be disposed on the inner top wall of the column 3. Since the floating nut 121 has a floating amount, when the positioning bolt moves to the designed positioning position, the floating nut 121 can also move accordingly and lock the positioning bolt.

Further, the upper beam 4 is provided with a positioning hole 41. In step S2, the upper beam 4 and the column 3 are positioned through the positioning member 110, which specifically includes:

Move the upper beam 4 to the position where the positioning bolts are inserted into the positioning holes 41 so that the upper beam 4 and the column 3 are positioned.

Of course, the upper crossbeam 4 can also be provided with a positioning groove, and the upper crossbeam 4 is moved to the position where the positioning bolt is inserted into the positioning groove, so that the upper crossbeam 4 and the column 3 are positioned. This embodiment is not limited to this.

Based on the same inventive concept, this application also provides a front-end frame for implementing the above front-end frame assembly method, including: an upper crossbeam 4 and two uprights 3 connected to both ends of the upper crossbeam 4. The tops of the uprights 3 are detachably provided. There is a positioning piece 110. When the positioning piece 110 is fixedly connected to the column 3, the position of the positioning piece 110 matches the designed positioning position to position the upper beam 4.

Since the positioning member 110 is at the designed positioning position in the vehicle positioning datum, the upper crossbeam 4 positioned according to the positioning member 110 is also at the designed position in the vehicle positioning datum, thereby eliminating the position deviation of the upper crossbeam 4 in the XY direction. The precise positioning of the upper beam 4 is achieved to ensure the gaps and step differences between the front hood, front skin, and headlights of the entire vehicle, and improve the dimensional accuracy and static perception quality of the entire vehicle.

Further, the positioning member 110 includes a threaded positioning bolt and a floating nut 121. The top of the column 3 is provided with a first through hole 31. The positioning bolt is movably provided in the first through hole 31. The floating nut 121 is operable to lock. Tighten the set bolts.

That is, the positioning bolt itself is movably set on the column 3. The positioning bolt has the designed positioning position in the vehicle positioning datum. When the installation position of the column 3 is accurate, the positioning bolt should also be exactly in the designed positioning position. When the column 3 When the position in the XY direction deviates, the positioning bolt will also deviate from the designed positioning position. At this time, just move the positioning bolt to the designed positioning position. The floating nut 121 can be disposed on the inner top wall of the column 3. Since the floating nut 121 has a floating amount, when the positioning bolt moves to the designed positioning position, the floating nut 121 can also move accordingly and lock the positioning bolt.

Further, the positioning member 110 also includes a floating nut box 122, wherein the floating nut box 122 is located at the top of the inner wall of the column 3, the floating nut box 122 is provided with a second through hole, and the floating nut 121 is movably located in the floating nut box. Within 122. The positioning bolt includes a head and a screw part connected to the head. The screw part is passed through the first through hole 31 and the second through hole and connected to the floating nut 121. In this embodiment, the diameter of the head is larger than that of the screw part. The diameter of the screw part is smaller than the diameter of the first through hole 31 , and the diameter of the head part is larger than the diameter of the first through hole 31 , so that the screw part can move in the first through hole 31 . The head can reach the second position from the first position; wherein, when the head is in the first position, the floating nut 121 can move in the floating nut box 122, and the screw part can move in the first through hole 31. Therefore, the screw part After moving to the designed positioning position in the first through hole 31, the floating nut 121 can also move to the corresponding position in the floating nut box 122. When the head is in the second position, the head conflicts with the top of the column 3 , the floating nut 121 conflicts with the top wall of the floating nut box 122, so that the floating nut 121 locks the positioning bolt.

When the head is in the first position, the floating nut 121 and the screw part are in a loosened state. Although the floating nut 121 and the screw part are not screwed, the end of the screw part is in contact with the screw hole of the floating nut 121, so that the screw part is in the first position. When moving in a through hole 31, the floating nut 121 can be driven to move. When the head is in the second position, the floating nut 121 and the screw part are in a threaded fastening state.

Further, the bottom of the floating nut box 122 is provided with a limiting hole 1221, and the floating nut 121 includes a nut body 1211 and a limiting plate 1212. The screw part is connected to the nut body 1211. The nut body 1211 is movably set in the limit hole. The range of movement of the nut body 1211 in the limit hole 1221 is the floating amount of the nut body 1211. The nut body 1211 is connected to the limit plate 1212; The limit plate 1212 is connected to the nut body 1211. The limit plate 1212 is clamped in the floating nut box 122 to ensure that the nut body 1211 does not fall off from the limit hole 1221. Of course, the limit plate 1212 is also movably arranged in the floating nut box. 122 so as not to restrict the movement of the nut body 1211 in the limiting hole 1221.

Specifically, since the position error of the upper beam 4 in the XY direction generally does not exceed ±3mm, the floating nut 121 in this embodiment can have a floating amount of ±3mm in the XY direction. Of course, the floating amount of the floating nut 121 is designed according to the actual situation. Can.

Further, the upper beam 4 is provided with positioning holes 41 corresponding to the positioning bolts of the two upright columns 3. The inner ring of one positioning hole 41 is matched with the outer ring of the corresponding positioning bolt, and the other positioning hole 41 is provided with a positioning hole 41 corresponding to the positioning bolt. The size is larger than the size of the corresponding set bolt. That is, when the two positioning bolts are moved to the designed positioning position, the outer ring of one positioning bolt is matched with the inner ring of the corresponding positioning hole 41 to achieve precise positioning of the upper beam 4, and in order to ensure that the other positioning bolt It can also be inserted into the corresponding positioning hole 41 to assemble the upper beam 4. Therefore, the size of the other positioning hole 41 is larger than the size of the corresponding positioning bolt to eliminate assembly errors. Specifically, one of the positioning holes 41 may be a long-waisted round hole.

Further, the front-end frame structure also includes more than one connecting assembly 200. The connecting assembly 200 is provided on the two upright columns 3. The connecting assembly 200 includes a connecting nut 210 and a connecting bolt (not shown). The connecting nut 210 is provided on the upright column 3. At the top of the inner wall, one end of the connecting bolt is screwed into the screw hole of the corresponding connecting nut 210, and the other end is screwed into the corresponding end of the upper beam 4. The connecting nut 210 is arranged on one side of the floating nut 121.

Specifically, each upright column 3 is provided with two connecting assemblies 200 , and the connecting nuts 210 in the two connecting assemblies 200 are respectively arranged on both sides of the floating nut 121 .

This application provides a front-end frame assembly method and front-end frame. Since the positioning member 110 is fixedly provided on the top of the column 3 according to the vehicle positioning reference, the position of the positioning member 110 coincides with the designed positioning position, and the upper cross beam 4 is aligned with the front-end frame assembly method. The upright column 3 is positioned through the positioning member 110. After the upper cross beam 4 is positioned, the upper cross beam 4 and the upright column 3 are fixedly connected. Therefore, the installation of the upper cross beam 4 avoids the position deviation caused by the longitudinal beam and ensures the position deviation of the upper cross beam 4. The positional installation accuracy ensures the gaps and step differences between the front hood, front skin, and headlights of the entire vehicle, and improves the dimensional accuracy and static perception quality of the entire vehicle.

Although the preferred embodiments of the present invention have been described, those skilled in the art will be able to make additional changes and modifications to these embodiments once the basic inventive concepts are apparent. Therefore, it is intended that the appended claims be construed to include the preferred embodiments and all changes and modifications that fall within the scope of the invention.

Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the invention. In this way, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and equivalent technologies, the present invention is also intended to include these modifications and variations.

Claims (5)

1. A front-end frame assembly method. The front-end frame includes an upper beam and two columns connected to both ends of the upper beam. It is characterized in that a positioning member is detachably provided on the top of the column. When the positioning member When fixedly connected to the upright column, the position of the positioning piece matches the designed positioning position; the positioning piece includes a threaded positioning bolt and a floating nut, and a first through hole is provided on the top of the upright column. The bolt is movably disposed in the first through hole, and the floating nut is operable to lock the positioning bolt; the upper beam is provided with corresponding positioning bolts of the two upright columns. Positioning holes, wherein the inner ring of one positioning hole is matched with the outer ring of the corresponding positioning bolt, and the size of the other positioning hole is larger than the size of the corresponding positioning bolt; the positioning member also includes a floating Nut box, the floating nut box is located at the top of the inner wall of the column, the floating nut box is provided with a second through hole, the floating nut is movably located in the floating nut box, and the positioning bolt It includes a head and a screw part connected to the head. The screw part is passed through the first through hole and the second through hole and connected to the floating nut. The head can be moved from the first position to the first through hole. Reaching the second position; wherein, when the head is in the first position, the floating nut is movable in the floating nut box, the screw part is movable in the first through hole, and in the head When in the second position, the head collides with the top of the upright column, and the floating nut collides with the top wall of the floating nut box; the front-end frame assembly method includes the following steps: S1: Install the column according to the vehicle positioning benchmark; S2: Fixedly set a positioning piece on the top of the column according to the vehicle positioning reference, so that the position of the positioning piece matches the designed positioning position, and position the upper beam and the column through the positioning piece; S3: Fixedly connect the upper beam and the upright column, and the front-end frame is assembled; The positioning member includes a threaded positioning bolt and a floating nut. In the step S2, the positioning member is fixed on the top of the column according to the vehicle positioning reference, which specifically includes: S21: Move the positioning piece to the designed positioning position according to the vehicle positioning reference; S22: Lock the positioning bolt to the designed positioning position through the floating nut. 2. The front-end frame assembly method according to claim 1, wherein the upper beam is provided with a positioning hole, and in step S2, the upper beam and the column are positioned through the positioning member. Specifically, include: Move the upper beam to a position where the positioning bolt is inserted into the positioning hole to position the upper beam and the upright column. 3. The front-end frame assembly method according to claim 1, wherein in step S3, the upper beam and the upright column are fixedly connected, which specifically includes: The upper beam and the upright column are fixedly connected through connecting bolts. 4. The front-end frame assembly method according to claim 1, wherein the bottom of the floating nut box is provided with a limiting hole, and the floating nut includes: A nut body is connected to the screw part, the nut body is movably arranged in the limiting hole, and the nut body is connected to the limiting plate; A limiting plate is connected to the nut body, and the limiting plate is clamped in the floating nut box. 5. The front-end frame assembly method according to claim 4, characterized in that the front-end frame further includes a connecting component provided on the upright column, the connecting component includes a connecting nut and a connecting bolt, the connecting nut Disposed on the top of the inner wall of the upright column, one end of the connecting bolt is screwed into the screw hole of the corresponding connecting nut, and the other end is screwed into the corresponding end of the upper beam.