CN221278185U - Tube beam mortise and tenon structure for vehicle - Google Patents

Abstract

The utility model provides a tube beam mortise-tenon joint structure for a vehicle, which utilizes a designed tube end mortise-tenon joint structure and can form tight and firm connection between different tube sections by means of hot air expansion and welding processes, is beneficial to improving processing precision, meets the length requirement of a tube finished product, reduces the preparation size and the number of parts of a vehicle body framework, gives consideration to strength and light weight indexes, reduces the preparation investment cost and the tube blank manufacturing cost, and can be widely applied to manufacturing of various complex vehicle body structural members.

Description

Tube beam mortise and tenon structure for vehicle

Technical Field

The utility model belongs to the technical field of vehicle body structural parts, and particularly relates to a tube beam mortise and tenon structure for a vehicle.

Background

In the current vehicle body structural design, thicker pipes are often used for the A column, the B column, the C column and the vehicle door anti-collision Liang Dengwei to ensure the strength, and thinner pipes are used at other positions to realize the light weight. The fixed connection is realized mainly by welding among different pipes, and the problems of lack of welding, welding leakage, easy breakage of welding seams and the like are difficult to avoid in welding. Some existing technologies, such as CN115151476B, adopt to weld the pipes with different pipe diameters and thicknesses first, and then utilize preheating before blow molding to improve the crystallization microstructure of the pipe blank, although the defect of poor reliability in direct welding can be avoided to a certain extent, the defect that the lack of welding and the missing welding cannot be completely eliminated still exists; meanwhile, the deformation rates of different tube blanks are necessarily different when the tube blanks are used for a long time or collide, so that the structural strength of the vehicle body is also negatively influenced, and potential safety hazards are easily caused.

Disclosure of Invention

In view of the above, the present utility model provides a mortise and tenon structure of a vehicular pipe beam, which is composed of a first pipe section, a second pipe section and a third pipe section;

The outer surfaces of the two ends of the third pipe section are respectively attached to the inner surfaces of the one ends of the first pipe section and the second pipe section;

The shapes of the first pipe section, the second pipe section and the third pipe section are formed by performing a hot air expansion process on the corresponding pipe blank; the outer surface of the joint of the third pipe section, the first pipe section and the second pipe section is tightly and fixedly connected by welding;

the first pipe section and the second pipe section have the same cross-sectional shape, inner diameter and outer diameter of the pipe near the end of each of the first pipe section and the second pipe section connected to the third pipe section; the first tube section, the second tube section and the third tube section have the same wall thickness.

Further, the third pipe section is inserted into a portion between both ends of the first pipe section and the second pipe section, respectively, and the protrusions are formed in the same pipe cross-sectional shape, inner diameter and outer diameter as the first pipe section and the second pipe section; the end edges of the first pipe section and the second pipe section are respectively abutted with two sides of the protruding portion.

Further, the outer surface of the joint of the third pipe section and the first pipe section and the second pipe section is tightly and fixedly connected by MAG welding or laser welding.

Further, a process notch is arranged on the peripheral surface of the end part of the first pipe section and/or the second pipe section connected with the third pipe section, and is used for facilitating the insertion of the third pipe section when the first pipe section and/or the second pipe section are connected with the third pipe section.

Further, the welding positions are only located at edges of the ends of the first pipe section and the second pipe section, which are abutted against both sides of the convex portion of the third pipe section, and at the side edges of the process gap perpendicular to the respective end edges of the first pipe section and the second pipe section, and do not include the bottom edges of the process gap parallel to the respective end edges of the first pipe section and the second pipe section.

The tube beam mortise and tenon joint structure for the vehicle provided by the utility model can form tight and firm connection between different tube sections by utilizing the designed tube end mortise and tenon joint structure and by means of thermal expansion and welding processes, is beneficial to improving the processing precision, meets the length requirement of a tube finished product, reduces the preparation size and the number of parts of a vehicle body framework, gives consideration to strength and light weight indexes, reduces the preparation investment cost and the tube blank manufacturing cost, and can be widely applied to manufacturing of various complex vehicle body structural members.

Drawings

Fig. 1 is a schematic diagram of an overall assembly structure of a mortise and tenon joint structure of a vehicular tubular beam;

FIG. 2 is a cross-sectional view of an alternative third tube segment construction and its connection to the first and second tube segments;

FIG. 3 is a cross-sectional view of an alternative configuration of a third tube segment with a raised middle portion and its connection to first and second tube segments;

FIG. 4 is an exploded perspective view of the first tube section, the second tube section, and the third tube section with the middle portion raised;

FIG. 5 is a perspective view of the connection and weld locations of the first and second tube segments with the third tube segment raised in the middle;

FIG. 6 is an exploded perspective view of a first tube segment and second and third tube segments with process indentations;

Fig. 7 is a perspective view of the connection and welding locations of the first and second pipe sections with the process gap and the third pipe section.

Detailed Description

The following description of the embodiments of the present utility model will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the utility model are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

In the description of the present utility model, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

The utility model provides a mortise and tenon structure of a vehicular pipe beam, which is shown in figure 1 and consists of a first pipe section 1, a second pipe section 2 and a third pipe section 3;

The first pipe section 1, the third pipe section 3 and the second pipe section 2 are sequentially connected, two ends of the third pipe section 3 are respectively inserted into one end of each of the first pipe section 1 and one end of each of the second pipe section 2 to form connecting mortise and tenon joints, and outer surfaces of two ends of the third pipe section 3 are respectively attached to inner surfaces of one end of each of the first pipe section 1 and the second pipe section 2;

the shapes of the first pipe section 1, the second pipe section 2 and the third pipe section 3 are all formed by performing a hot air expansion process on corresponding pipe blanks; the outer surface of the joint of the third pipe section 3 and the first pipe section 1 and the second pipe section 2 is tightly and fixedly connected by welding;

The first pipe section 1 and the second pipe section 2 have the same pipe cross-sectional shape, inner diameter and outer diameter near the end portion thereof to which the third pipe section 3 is connected; the first pipe section 1, the second pipe section 2 and the third pipe section 3 have the same pipe wall thickness, the purpose of the design is that the integral shape of the connected pipe beam parts is consistent, enough structural strength can be ensured even if a thinner pipe section is used, and the pipe beam parts have similar deformation rates in long-term use and collision, so that the hidden danger of local fracture is avoided, and the integral weight reduction of the automobile body is also facilitated.

Fig. 2 shows an alternative third tubular segment in longitudinal cross-section in the form of a straight tube having a shorter length than the first and second tubular segments.

In a preferred embodiment of the invention as shown in fig. 3-5, the third tube section 3 has a slightly smaller tube diameter at both ends, and is inserted into the ends of the first tube section 1 and the second tube section 2, respectively, with the portions between the ends thereof being convex to form the same tube cross-sectional shape, inner diameter and outer diameter as the first tube section and the second tube section; the end edges of the first pipe section and the second pipe section are respectively abutted against two sides of the protruding portion, so that design requirements of different pipe finished products in the aspects of process implementation, structural strength, appearance and the like are met.

In a preferred embodiment of the invention, the outer surfaces of the joints of the third pipe section and the first pipe section and the second pipe section are tightly connected by MAG welding or laser welding, and appropriate polishing can be performed after the welding is finished to ensure that the surfaces are flat and smooth. The black line in fig. 5 shows the welding execution position of the mortise and tenon joint having the second type third pipe segment structure.

In a preferred embodiment of the invention as shown in fig. 6 and 7, a process recess is provided in the peripheral surface of the end of the first pipe section and/or the second pipe section connected to the third pipe section for facilitating the insertion of the third pipe section when connected to the third pipe section. If a shorter third pipe section is used, the first pipe section or the second pipe section can be initially connected only by being placed into the end part of the first pipe section or the end part of the second pipe section from the process notch, and in the actual production process, the pipe inserting mode without the process notch is improved to be a splicing mode, so that the operation is simpler and more convenient, and the production efficiency is improved.

And for this splicing mode, the welding position can be only located at the edges of the ends of the first pipe section and the second pipe section, which are abutted against both sides of the protruding part of the third pipe section, and the side edges of the technological gap perpendicular to the edges of the ends of the first pipe section and the second pipe section, but not at the bottom edges or corners of the technological gap parallel to the edges of the ends of the first pipe section and the second pipe section, so that the welding at the above positions is sufficient to ensure the firmness of the connection between the three pipe sections, and the welding operation is simplified and the production efficiency is improved. Even when the shorter third pipe section is used, gaps exist at the bottom edge of the process gap due to the fact that welding is not carried out, and structural strength of a finished pipe beam product is not reduced.

It should be understood that, the sequence number of each step in the embodiment of the present utility model does not mean that the execution sequence of each process should be determined by the function and the internal logic of each process, and should not limit the implementation process of the embodiment of the present utility model.

Although embodiments of the present utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims (5)

1. A vehicular tubular beam mortise and tenon structure which is characterized in that: the device consists of a first pipe section, a second pipe section and a third pipe section;

The outer surfaces of the two ends of the third pipe section are respectively attached to the inner surfaces of the one ends of the first pipe section and the second pipe section;

The shapes of the first pipe section, the second pipe section and the third pipe section are formed by performing a hot air expansion process on the corresponding pipe blank; the outer surface of the joint of the third pipe section, the first pipe section and the second pipe section is tightly and fixedly connected by welding;

The first pipe section and the second pipe section have the same pipe cross-sectional shape, inner diameter and outer diameter near the end of each of the first pipe section and the second pipe section connected to the third pipe section; the first tube section, the second tube section and the third tube section have the same wall thickness.

2. The vehicular tubular beam mortise and tenon joint structure according to claim 1, characterized in that: the third pipe section is inserted into the part between the two ends of the first pipe section and the second pipe section respectively, and the bulges form the same pipe section shape, inner diameter and outer diameter as the first pipe section and the second pipe section; the end edges of the first pipe section and the second pipe section are respectively abutted with two sides of the protruding portion.

3. The vehicular tubular beam mortise and tenon joint structure according to claim 1, characterized in that: the outer surface of the joint of the third pipe section and the first pipe section and the second pipe section is tightly and fixedly connected by MAG welding or laser welding.

4. The vehicular tubular beam mortise and tenon joint structure according to claim 2, characterized in that: the peripheral surface of the end part of the first pipe section and/or the second pipe section connected with the third pipe section is provided with a process notch which is used for facilitating the insertion of the third pipe section when the first pipe section and/or the second pipe section are connected with the third pipe section.

5. The vehicular tubular beam mortise and tenon joint structure according to claim 4, characterized in that: the welding positions are only located at edges of the ends of the first pipe section and the second pipe section, which are abutted against both sides of the convex portion of the third pipe section, and at the side edges of the process gap perpendicular to the respective end edges of the first pipe section and the second pipe section, and do not include the bottom edges of the process gap parallel to the respective end edges of the first pipe section and the second pipe section.