Subframe, assembly system and method

Abstract

The present application relates to the technical field of subframe, in particular to a subframe, an assembly system and a method. The subframe comprises a first beam assembly, a second beam assembly and a third beam assembly. The first short unit and the first long unit of the first beam assembly are connected to the first beam unit in sequence. The second long unit and the second short unit of the second beam assembly are connected to the second beam unit in sequence. The third long unit is connected to the second beam unit. Part of the second long unit is located in the surrounding space of the first long unit, or part of the first long unit is located in the surrounding space of the second long unit. The first short unit is connected to the second long unit. The second short unit is connected to the first long unit. Part of the third beam assembly is located in the surrounding space of the third long unit, or part of the third long unit is located in the surrounding space of the third beam assembly. The third long unit is connected to the third beam assembly. Thus, the problem of low assembly efficiency of the subframe is solved.

Description

Technical Field

[0001] This invention relates to the field of subframe technology, and more specifically, to a subframe, assembly system, and method. Background Technology

[0002] The subframe is one of the components in a vehicle used to improve rigidity. It is not a regular, simple component; rather, it is a multi-branched frame structure with numerous irregularly shaped structures such as swing arm supports, engine mount lugs, cable supports, reinforcing ribs, and hollowed-out weight-reduction zones. Therefore, the various parts of the subframe are usually manufactured separately and then joined together, either by welding or gluing.

[0003] Currently, the two beams in the subframe are typically moved along their length to interlock, forming a structure where one beam partially encloses the other, and then the two are connected. However, this method usually requires precise positioning and alignment in the height and width directions of the beams, a time-consuming process that results in low efficiency. Summary of the Invention

[0004] To address the problem of low assembly efficiency of subframes, this invention provides a subframe, assembly system, and method.

[0005] In a first aspect, the present invention provides a subframe, the subframe comprising:

[0006] The first beam assembly includes a first beam unit, a first long unit, and a first short unit; the first short unit and the first long unit are sequentially connected to one end of the first beam unit along a first direction of the thickness of the first beam unit; the first long unit extends beyond the first short unit at the end away from the first beam unit.

[0007] The second beam assembly includes a second beam unit, a second long unit, a second short unit, and a third long unit; the second long unit and the second short unit are sequentially connected to one end of the second beam unit along the first direction of the thickness of the second beam unit; the second long unit extends beyond the second short unit at the end away from the second beam unit; the third long unit is connected to the end of the second beam unit away from the second long unit; a portion of the second long unit is located within the enclosing space of the first long unit, or a portion of the first long unit is located within the enclosing space of the second long unit; the first short unit is connected to the second long unit; the second short unit is connected to the first long unit.

[0008] The third beam assembly, a portion of which is located within the enclosing space of the third long unit, or a portion of which is located within the enclosing space of the third beam assembly; the third long unit is connected to the third beam assembly.

[0009] Optionally, a portion of the second long unit is located within the space enclosed by the first long unit.

[0010] Optionally, a portion of the first short unit is located within the space enclosed by the second long unit.

[0011] Optionally, the first short unit includes a first short middle plate and two first short side plates; one first short side plate, the first short middle plate, and the other first short side plate are connected in sequence; the first short middle plate and the first short side plates are respectively connected to the end of the first beam unit near the first long unit; the first short middle plate, the first short side plates, and the first long unit are arranged in sequence along the first direction; the minimum distance between the two first short side plates on their respective farthest sides gradually decreases along the direction from the first beam unit to the second beam unit; a portion of the first short side plates are disposed within the enclosing space of the first long unit; the mutually farthest sides of the two first short side plates are connected to the first long unit; the mutually farthest sides of the two first short side plates and the side of the first short middle plate away from the first long unit are respectively disposed within the enclosing space of the second long unit; the mutually farthest sides of the two first short side plates and the side of the first short middle plate away from the first long unit are respectively connected to the second long unit.

[0012] Optionally, a portion of the second short unit is located within the space enclosed by the first long unit.

[0013] Optionally, the subframe further includes a second reinforcing component;

[0014] The second beam assembly further includes a third short unit; the third short unit is connected to the end of the second beam assembly away from the second long unit; the third long unit and the third short unit are arranged sequentially along the first direction of the thickness of the second beam unit; the third long unit and the second reinforcing component are sequentially connected to one end of the third beam assembly along the first direction; a portion of the third beam assembly and at least a portion of the third short units are respectively disposed within the enclosing space of the third long unit and the second reinforcing component; a portion of the third long unit is located within the enclosing space of the second reinforcing component, or a portion of the second reinforcing component is located within the enclosing space of the third long unit; the third beam assembly is connected to the third long unit and the second reinforcing component respectively; the second reinforcing component is connected to the third long unit.

[0015] Optionally, the subframe further includes a first reinforcing component; the first reinforcing component includes a first abutting portion, a supporting portion, and a second abutting portion; the first abutting portion, the supporting portion, and the second abutting portion are connected in sequence; the first abutting portion is connected to the side of the first long unit near the second long unit; the second abutting portion is connected to the side of the second long unit near the first long unit;

[0016] The second beam assembly also includes a clearance opening; the clearance opening extends from the side of the second long unit away from the first long unit to the side of the second long unit closer to the first long unit; at least a portion of the second abutment portion is located within the projection area of ​​the clearance opening along the first direction.

[0017] In a second aspect, the present invention provides a subframe assembly system, the subframe assembly system comprising any of the subframes described in the first aspect, and the subframe assembly system further comprising:

[0018] Assembly components, including support units, connection units, and handling units;

[0019] The assembly state of the assembly system includes the first beam assembly and the third beam assembly being detachably connected to the support unit, the transport unit driving the second beam assembly to move, and the connection unit connecting the second beam assembly to the junctions of the first beam assembly and the third beam assembly.

[0020] Thirdly, the present invention provides a subframe assembly method, wherein the subframe assembly system is applied to the subframe assembly system described in the second aspect, and the subframe assembly method includes:

[0021] The first beam assembly and the third beam assembly are positioned on the support unit; wherein, the positioning is completed by the first beam assembly and the third beam assembly being spaced apart, and the first short unit and the first long unit being arranged sequentially along the first direction;

[0022] The second beam assembly is moved along the first direction to a combined state; wherein, the combined state includes the second long unit and the second short unit being arranged sequentially along the first direction; a portion of the second long unit is located within the enclosing space of the first long unit, or a portion of the first long unit is located within the enclosing space of the second long unit; a portion of the third beam assembly is located within the enclosing space of the third long unit, or a portion of the third long unit is located within the enclosing space of the third beam assembly;

[0023] The connecting unit connects the second beam assembly to the junctions of the first beam assembly and the third beam assembly.

[0024] Optionally, the subframe further includes a second reinforcing assembly; the second beam assembly further includes a third short unit; the third short unit is connected to the end of the second beam unit away from the second long unit;

[0025] The positioning process also includes a portion of the third beam assembly being located within the enclosing space of the second reinforcing assembly; the third beam assembly and the second reinforcing assembly are arranged sequentially along the first direction;

[0026] The combined state includes the second long unit and the second short unit being arranged sequentially along the first direction; a portion of the second long unit is located within the enclosing space of the first long unit; a portion of the third beam assembly and at least a portion of the third short unit are located within the enclosing space of the third long unit and the second reinforcing assembly; the third long unit and the third short unit are arranged sequentially along the first direction of the thickness of the second beam unit;

[0027] The connection unit connects the second beam assembly to the junctions of the first beam assembly and the third beam assembly, respectively, including:

[0028] The connecting unit welds to the first region; wherein, the first region is the junction of the third long unit with the third beam assembly and the second reinforcing assembly;

[0029] The connecting unit welds to the second region; wherein, the second region is the junction of the second long unit with the first short unit and the first long unit respectively;

[0030] The support unit flips the subframe to the first long unit and the first short unit, which are arranged sequentially along the first direction;

[0031] The connecting unit welds the third region; wherein the third region is the junction of the first long unit and the second short unit.

[0032] The connecting unit welds the fourth region to the combined state; wherein the fourth region is the junction of the second reinforcing component with the third beam component and the third short unit.

[0033] To address the problem of low assembly efficiency of subframes, this invention has the following advantages:

[0034] By configuring a subframe comprising a first beam assembly, a second beam assembly, and a third beam assembly, a first short unit and a first long unit are sequentially connected to one end of the first beam unit along a first direction of the thickness of the first beam unit. A second long unit and a second short unit are sequentially connected to one end of the second beam unit along a first direction of the thickness of the second beam unit. A third long unit is connected to the end of the second beam unit away from the second long unit. Part of the second long unit and the first long unit, and part of the third long unit and the third beam assembly, respectively form a cooperative structure in which they are surrounded by each other. At least some of the first long unit, the second long unit, the third long unit, and the third beam assembly are configured as a three-sided semi-enclosed shell with openings. The opening side of the shell can deform, which can compensate for the positional deviation between the components during the assembly process, thereby eliminating the need for precise positioning and alignment operations in multiple directions, simplifying the assembly process, and ultimately solving the problems of time-consuming assembly and low assembly efficiency of existing subframes. At the same time, the connection structure between the first short unit, the first long unit, and the first beam unit can also improve the overall structural strength of the first beam assembly. Attached Figure Description

[0035] Figure 1 A first-view schematic diagram of a subframe according to one embodiment is shown;

[0036] Figure 2 A second-view schematic diagram of a subframe according to one embodiment is shown;

[0037] Figure 3 It shows Figure 2 A partial schematic diagram of the CC section of the subframe in the vehicle;

[0038] Figure 4 It shows Figure 2 A partial schematic diagram of the DD section of the subframe in the vehicle;

[0039] Figure 5 A third-view schematic diagram of a subframe according to one embodiment is shown;

[0040] Figure 6 It shows Figure 5 A partial schematic diagram of the AA section of the subframe in the vehicle;

[0041] Figure 7 It shows Figure 5 A partial schematic diagram of the BB section of the subframe in the vehicle;

[0042] Figure 8 It shows Figure 5 A magnified view of a portion of the subframe;

[0043] Figure 9 A schematic diagram of a first reinforcing component according to one embodiment is shown;

[0044] Figure 10A schematic diagram of a subframe assembly method according to one embodiment is shown.

[0045] Reference numerals: 10 First beam assembly; 11 First beam unit; 12 First long unit; 13 First short unit; 131 First short middle plate; 132 First short side plate; 20 Second beam assembly; 21 Second beam unit; 22 Second long unit; 23 Second short unit; 24 Third long unit; 25 Third short unit; 26 Clearance opening; 30 Third beam assembly; 40 First reinforcing assembly; 41 First abutment part; 42 Support part; 43 Second abutment part; 50 Second reinforcing assembly. Detailed Implementation

[0046] The present disclosure will now be discussed with reference to several exemplary embodiments. It should be understood that these embodiments are discussed only to enable those skilled in the art to better understand and thus implement the present disclosure, and are not intended to imply any limitation on the scope of the disclosure.

[0047] As used herein, the term "comprising" and its variations are to be interpreted as open-ended terms meaning "including but not limited to". The term "based on" is to be interpreted as "at least partially based on". The terms "one embodiment" and "an embodiment" are to be interpreted as "at least one embodiment". The term "another embodiment" is to be interpreted as "at least one other embodiment". The terms "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", "vertical", "horizontal", "lateral", "longitudinal", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. These terms are primarily for the purpose of better describing this application and its embodiments and are not intended to limit the indicated devices, elements, or components to having a specific orientation or being constructed and operated in a specific orientation. Furthermore, some of the above terms may be used to indicate other meanings besides orientations or positional relationships; for example, the term "upper" may in some cases indicate a dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this application according to the specific circumstances. In addition, the terms "installed", "set up", "equipped with", "connected", and "linked" should be interpreted broadly. For example, it can be a fixed connection, a detachable connection, or an integral structure; 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 an internal connection between two devices, elements, or components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances. Furthermore, the terms "first," "second," etc., are mainly used to distinguish different devices, elements, or components (the specific types and structures may be the same or different), and are not used to indicate or imply the relative importance or quantity of the indicated devices, elements, or components. Unless otherwise stated, "a plurality of" means two or more.

[0048] Currently, when assembling a subframe that includes a first beam assembly, a second beam assembly, and a third beam assembly, the conventional processing method involves moving the beams of different beam assemblies relative to each other along their length and interlocking them to form a structure where one type of beam is partially enclosed by another type of beam before connecting and fixing them. In actual operation, this assembly method requires precise positioning and alignment of the beams in both height and width directions. This positioning and alignment process is cumbersome and time-consuming, resulting in generally low overall assembly efficiency for the subframe.

[0049] Example 1:

[0050] This embodiment discloses a subframe, such as Figure 1 As shown, the subframe includes: a first beam assembly 10, a second beam assembly 20, and a third beam assembly 30;

[0051] The first beam assembly 10 includes a first beam unit 11, a first long unit 12, and a first short unit 13; the first short unit 13 and the first long unit 12 are along a first direction along the thickness of the first beam unit 11 (the first direction may be as follows). Figure 7 As shown (from left to right), one end of the first beam unit 11 is connected sequentially; the end of the first long unit 12 away from the first beam unit 11 extends beyond the end of the first short unit 13 away from the first beam unit 11; the first short unit 13 and the first long unit 12 are connected to the first beam unit 11 in a single integral molding manner, thereby improving the strength of the first beam assembly 10; as shown Figure 6 As shown, the second beam assembly 20 includes a second beam unit 21, a second long unit 22, a second short unit 23, and a third long unit 24; the second long unit 22 and the second short unit 23 are sequentially connected to one end of the second beam unit 21 along a first direction of the thickness of the second beam unit 21; the end of the second long unit 22 away from the second beam unit 21 extends beyond the end of the second short unit 23 away from the second beam unit 21; the third long unit 24 is connected to the end of the second beam unit 21 away from the second long unit 22; a portion of the second long unit 22 is located within the enclosing space of the first long unit 12, or a portion of the first long unit 12 is located within the enclosing space of the second long unit 22; the first short unit 13 is connected to the second long unit 22; the second short unit 23 is connected to the first long unit 12.

[0052] A portion of the third beam assembly 30 is located within the enclosing space of the third long unit 24, or a portion of the third long unit 24 is located within the enclosing space of the third beam assembly 30; the third long unit 24 is connected to the third beam assembly 30.

[0053] During the assembly process, the second beam assembly 20 is moved relative to the first beam assembly 10 and the third beam assembly 30 along a first direction, such that a portion of the second long unit 22 is located within the enclosing space of the first long unit 12, or a portion of the first long unit 12 is located within the enclosing space of the second long unit 22, and a portion of the third beam assembly 30 is located within the enclosing space of the third long unit 24, or a portion of the third long unit 24 is located within the enclosing space of the third beam assembly 30, thereby engaging with each other; then the junction between the second long unit 22 and the first long unit 12 is connected, and the junction between the third beam assembly 30 and the third long unit 24 is connected; the aforementioned junctions are located on the outer surface of the subframe, and the connection method can be gluing or welding, preferably the more robust welding;

[0054] In this configuration, during the assembly of the first beam assembly 10, the second beam assembly 20, and the third beam assembly 30 to form a subframe, at least one of the first long unit 12 and the second long unit 22 is configured to form an open shell with three-sided semi-enclosed material, and at least one of the third long unit 24 and the third beam assembly 30 is configured to form an open shell with three-sided semi-enclosed material, allowing for the following to occur on the open side: Figure 7 The deformation in the vertical direction is shown. Even if the first long unit 12 and the second long unit 22 are as shown... Figure 7 The relative positions in the vertical direction shown have a certain error, and the deformation on the opening side can compensate for this error, thereby improving assembly efficiency. Even if the third long unit 24 and the third beam assembly 30... Figure 3 The relative positions in the left and right directions shown have a certain error. The deformation of the opening side can also compensate for this error, thereby improving the assembly efficiency.

[0055] Furthermore, the first beam unit 11 can be divided into two parts along the first direction; the metal base material is processed into a part of the first beam unit 11 and a first short unit 13 with complex shapes and thin walls by casting, stamping, and hydroforming; the metal base material is processed into another part of the first beam unit 11 and a first long unit 12 with complex shapes and thin walls by casting, stamping, and hydroforming; then the part of the first beam unit 11 and the other part of the first beam unit 11 are sequentially arranged and welded along the first direction, and the first short unit 13 and the first long unit 12 are sequentially arranged and welded along the first direction; in this way, such complex-shaped products can be manufactured more efficiently, and the processing method of the first beam assembly 10 can also be used to process the second beam assembly 20.

[0056] Furthermore, such as Figure 5 , Figure 7 As shown, part of the second long unit 22 is located within the space enclosed by the first long unit 12;

[0057] During the assembly process of this subframe structure, the first beam assembly 10 is first positioned, and then the second beam assembly 20 is moved along the first direction until part of the second long unit 22 is located within the space surrounded by the first long unit 12. The first direction can be the direction of gravity. When connecting the second long unit 22 and the first long unit 12, both the adhesive used for bonding and the molten metal generated by welding will slide down due to gravity. The step formed by the first long unit 12 wrapping around the second long unit 22 can support the adhesive and molten metal, allowing them to solidify stably, thereby improving assembly efficiency.

[0058] Furthermore, such as Figure 5 , Figure 7As shown, part of the first short unit 13 is located within the space enclosed by the second long unit 22, which allows the first short unit 13, the first long unit 12, and the second long unit 22 to have a certain overlapping area, thereby improving the strength.

[0059] Furthermore, such as Figure 7 As shown, the first short unit 13 includes a first short middle plate 131 and two first short side plates 132; one first short side plate 132, the first short middle plate 131, and the other first short side plate 132 are connected in sequence; the first short middle plate 131 and the first short side plate 132 are respectively connected to the end of the first beam unit 11 near the first long unit 12; the first short middle plate 131, the first short side plate 132, and the first long unit 12 are arranged in sequence along a first direction; the minimum distance between the two first short side plates 132 on their opposite sides is along the direction from the first beam unit 11 to the second beam unit 21 (i.e., as shown in the figure). Figure 5 The length of the first short unit 13 gradually decreases from right to left, forming a tapered structure. A portion of the first short side plate 132 is positioned within the enclosing space of the first long unit 12. The sides of the two first short side plates 132 that are furthest from each other are connected to the first long unit 12. The sides of the two first short side plates 132 that are furthest from each other and the side of the first short middle plate 131 that is furthest from the first long unit 12 are respectively positioned within the enclosing space of the second long unit 22. The sides of the two first short side plates 132 that are furthest from each other and the side of the first short middle plate 131 that is furthest from the first long unit 12 are respectively connected to the second long unit 22. The tapered structure design of the first short unit 13 can guide the second long unit 22, thereby compensating for the unevenness along the assembly process of the first short unit 13 and the second long unit 22. Figure 7 The positional deviation in the vertical direction shown facilitates interlocking during assembly; the first short unit 13 is a thin-walled object with a complex shape, which can be processed from the base material using processes such as casting, stamping, and hydroforming, which is efficient and simple.

[0060] Furthermore, the first long unit 12, the second long unit 22, the second short unit 23, the third long unit 24, and the third short unit 25 can all be configured as thin-walled structures with a C-shaped cross-section, just like the first short unit 13.

[0061] Furthermore, such as Figure 5 , Figure 6 As shown, part of the second short unit 23 is located within the space enclosed by the first long unit 12, so that the second short unit 23, the first long unit 12, and the second long unit 22 can form an overlapping structure, thereby improving the strength; and when the second beam assembly 20 moves along the first direction to engage with the first beam assembly 10, the first long unit 12 has a certain positioning effect on the bottom surface of the second short unit 23.

[0062] Furthermore, such as Figure 1 , Figure 2As shown, the subframe also includes a second reinforcing component 50;

[0063] The second beam assembly 20 also includes a third short unit 25; the third short unit 25 is connected to the end of the second beam unit 21 near the third long unit 24; the third long unit 24 and the third short unit 25 are arranged sequentially along a first direction of the thickness of the second beam unit 21; the third long unit 24 and the second reinforcing assembly 50 are sequentially connected to one end of the third beam assembly 30 along the first direction; as shown Figure 3 , Figure 4 As shown, a portion of the third beam assembly 30 and at least a portion of the third short unit 25 are respectively disposed within the space enclosed by the third long unit 24 and the second reinforcing assembly 50; a portion of the third long unit 24 is located within the space enclosed by the second reinforcing assembly 50, or a portion of the second reinforcing assembly 50 is located within the space enclosed by the third long unit 24; the third beam assembly 30 is connected to the third long unit 24 and the second reinforcing assembly 50 respectively; the second reinforcing assembly 50 is connected to the third long unit 24; the third beam assembly 30 can be an integrally formed tubular material with high strength. When assembling the subframe, some of the second reinforcing components 50 and some of the third beam components 30 can be sequentially overlapped along the first direction. Then, the second beam component 20 is moved along the first direction until some of the third beam components 30 and at least some of the third short units 25 are respectively placed within the enclosing space of the third long unit 24 and the second reinforcing component 50, thereby completing the fastening. Next, the junctions of the third long unit 24, the third short unit 25, and the third beam component 30 with the second reinforcing component 50 are connected, as well as the junction of the third beam component 30 with the third long unit 24. The aforementioned junctions are located on the outer surface of the subframe, and the connection method can be gluing or welding, preferably the more robust welding. The third long unit 24 and the second reinforcing component 50 are respectively configured as a shell with an opening, partially enclosed by three materials, and the opening side can be subjected to... Figure 3 The deformation in the left and right directions is shown. Even if any two of the second reinforcing component 50, the third beam component 30, and the third long unit 24 are as shown... Figure 3 The relative positions in the left and right directions shown have a certain error, and even if any two of the second reinforcing component 50, the third beam component 30, and the third short unit 25 are as follows: Figure 4 The relative positions in the left and right directions shown have a certain error. The deformation of the opening side can also compensate for this error, thereby improving the assembly efficiency.

[0064] Furthermore, such as Figure 6 , Figure 8 , Figure 9As shown, the subframe also includes a first reinforcing component 40; the first reinforcing component 40 includes a first abutment portion 41, a support portion 42, and a second abutment portion 43; the first abutment portion 41, the support portion 42, and the second abutment portion 43 are connected in sequence; the first abutment portion 41 is connected to the side of the first long unit 12 near the second long unit 22; the second abutment portion 43 is connected to the side of the second long unit 22 near the first long unit 12; after the second long unit 22 and the first long unit 12 are connected, they can surround each other to form a structure with a cavity, and the first reinforcing component 40 can strengthen the strength of the structure along the first direction. The first reinforcing component 40 can be integrally formed.

[0065] The second beam assembly 20 also includes a clearance opening 26; the clearance opening 26 extends from the side of the second long unit 22 away from the first long unit 12 to the side of the second long unit 22 closer to the first long unit 12; at least a portion of the second abutment portion 43 is located within the projection area of ​​the clearance opening 26 along the first direction; during the assembly of the subframe, the first beam assembly 10 is first positioned, then the first abutment portion 41 is connected to the first long unit 12, and then the first beam assembly 10 and the second beam assembly 20 are moved relative to each other along the first direction until a portion of the second long unit 22 is located within the first long unit 12. Within the enclosing space, or part of the first long unit 12 is located within the enclosing space of the second long unit 22, thereby interlocking with each other. Then, the clearance opening 26 is used to connect the junction of the second abutment part 43 and the second long unit 22, and to connect the junctions of the first long unit 12 with the second short unit 23 and the second long unit 22 respectively, and to connect the junction of the second long unit 22 with the first short unit 13. The aforementioned junctions are located on the surface outside the subframe enclosing space, and the connection method can be gluing or welding, preferably more robust welding.

[0066] Example 2:

[0067] This embodiment provides a subframe assembly system, which includes any of the subframes described in Embodiment 1 above. The subframe assembly system may also include assembly components.

[0068] The assembly components include a support unit, a connecting unit, and a transport unit. The support unit can fix the relative positions of the first beam assembly 10, the second beam assembly 20, and the third beam assembly 30, thereby achieving the function of positioning and clamping. The connecting unit can be an automated welding device or an automated gluing device. The transport unit can be an automated transport robot, which can transport the first beam assembly 10, the second beam assembly 20, and the third beam assembly 30 from a designated position to the support unit according to the program.

[0069] The assembly state of the assembly system includes the first beam assembly 10 and the third beam assembly 30 being detachably connected to the support unit, the transport unit driving the second beam assembly 20 to move along the first direction, and the connecting unit connecting the second beam assembly 20 to the junction of the first beam assembly 10 and the third beam assembly 30 respectively; the junction is located on the surface outside the subframe enclosure space, and the connection method can be gluing or welding, preferably the more robust welding.

[0070] Using the above configuration, during the assembly of the first beam assembly 10, the second beam assembly 20, and the third beam assembly 30 into a subframe, at least one of the first long unit 12 and the second long unit 22 is constructed as an open shell partially enclosed by three-sided materials, and at least one of the third long unit 24 and the third beam assembly 30 is constructed as an open shell partially enclosed by three-sided materials, with its open side capable of producing... Figure 7 The deformation is shown in the vertical direction. Even if the first long unit 12 and the second long unit 22 are in... Figure 7 The relative positions in the vertical direction shown have a certain error, and the deformation generated on the opening side can compensate for this error, thereby improving assembly efficiency; even if the third long unit 24 and the third beam assembly 30 are in Figure 3 The relative positions shown in the left and right directions have a certain error. The deformation generated on the opening side can also compensate for this error, thereby improving assembly efficiency.

[0071] Example 3:

[0072] This embodiment provides a subframe assembly method, which is applied to a subframe assembly system in Embodiment 2 described above, such as... Figure 10 As shown, the subframe assembly method may include steps S11 to S13, and each step will be described in detail below.

[0073] Step S11: The transport unit moves the first beam assembly 10 and the third beam assembly 30 onto the support unit, thus completing the positioning of the first beam assembly 10 and the third beam assembly 30 on the support unit; wherein, the positioning is completed by the first beam assembly 10 and the third beam assembly 30 moving along... Figure 5 As shown, the left and right directions are spaced apart, and the first short unit 13 and the first long unit 12 are arranged sequentially along the first direction;

[0074] In step S12, the transport unit moves the second beam assembly 20 along the first direction to the assembled state; wherein, the assembled state includes the second long unit 22 and the second short unit 23 being arranged sequentially along the first direction; a portion of the second long unit 22 is located within the enclosing space of the first long unit 12, or a portion of the first long unit 12 is located within the enclosing space of the second long unit 22; a portion of the third beam assembly 30 is located within the enclosing space of the third long unit 24, or a portion of the third long unit 24 is located within the enclosing space of the third beam assembly 30; when the first beam assembly 10, the second beam assembly 20, and the third beam assembly 30 are assembled to form a subframe, at least one of the first long unit 12 and the second long unit 22 adopts a three-sided material semi-enclosed open shell structure, and at least one of the third long unit 24 and the third beam assembly 30 also adopts a three-sided material semi-enclosed open shell structure, the open side of which has as follows Figure 7 The vertical deformation capability is shown. Based on this deformation capability, the first long unit 12 and the second long unit 22... Figure 7 The relative positional error in the vertical direction shown can be compensated for by the deformation on the opening side. The third long element 24 and the third beam assembly 30 are in Figure 3 The relative positional error in the left and right directions shown can also be compensated by the deformation of the opening side, thereby significantly improving assembly efficiency.

[0075] In step S13, the connecting unit connects the second beam assembly 20 to the junctions of the first beam assembly 10 and the third beam assembly 30 respectively; the junctions are located on the surface outside the subframe enclosure space, and the connection method can be gluing or welding, preferably welding, which is more robust.

[0076] Furthermore, the subframe also includes a second reinforcing component 50; the second beam assembly 20 also includes a third short unit 25; the third short unit 25 is connected to the end of the second beam unit 21 away from the second long unit 22;

[0077] The positioning process also includes the fact that part of the third beam assembly 30 is located within the space enclosed by the second reinforcing assembly 50; the third beam assembly 30 and the second reinforcing assembly 50 are arranged sequentially along the first direction;

[0078] The combined state includes a second long unit 22 and a second short unit 23 arranged sequentially along a first direction; a portion of the second long unit 22 is located within the space enclosed by the first long unit 12, and the first direction can be the direction of gravity. This arrangement allows the first long unit 12 to wrap around the second long unit 22, forming a step. Both adhesives and molten metal produced by welding will slide down under the influence of gravity. The first long unit 12 can bear the adhesive and molten metal, allowing them to solidify stably, thereby improving assembly efficiency. A portion of the third beam assembly 30 and at least a portion of the third short unit 25 are located within the space enclosed by the third long unit 24 and the second reinforcing assembly 50; the third long unit 24 and the third short unit 25 are arranged sequentially along the first direction of the thickness of the second beam unit 21. This arrangement allows the second reinforcing assembly 50 to wrap around the third long unit 24, forming a step. Both adhesives and molten metal produced by welding will slide down under the influence of gravity. The first long unit 12 can bear the adhesive and molten metal, allowing them to solidify stably, thereby improving assembly efficiency.

[0079] Step S13, involving the second beam assembly 20, the first beam assembly 10, and the third beam assembly 30, includes steps S131 to S135. Steps S11, S12, and S131 to S135 are executed sequentially. Each step will be described in detail below:

[0080] Step S131, the connecting unit welds the first region; wherein, the junction of the third long unit 24 with the third beam assembly 30 and the second reinforcing assembly 50 is the first region, the first region is the outer surface of the subframe, and welding the first region from the top of the first region is convenient to operate and reduces the amount of movement of the melt before solidification.

[0081] Step S132, the connecting unit welds the second region; wherein, the second region is the junction of the second long unit 22 with the first short unit 13 and the first long unit 12 respectively, and the second region is the outer surface of the subframe; welding the second region from the top of the second region is convenient to operate and can also reduce the amount of movement of the melt before solidification.

[0082] In step S133, the support unit fixes the relative positions of the first beam assembly 10, the second beam assembly 20, and the third beam assembly 30, and flips the subframe so that the first long unit 12 and the first short unit 13 are arranged sequentially along the first direction, so that the parts to be welded later are located on the top of the subframe, which facilitates the welding operation.

[0083] Step S134: The connecting unit welds the third region; wherein, the junction of the first long unit 12 and the second short unit 23 is the third region, which is the outer surface of the subframe; the welding area of ​​the second region is larger than that of the first, third and fourth regions, resulting in more heat accumulation. During the cooling process after welding, the material deforms severely due to thermal expansion and contraction. Welding the third region after the second region is completed can limit the deformation of the surrounding material of the second region by connecting the third region.

[0084] In step S135, the connecting unit welds the fourth region to the combined state, thereby completing the welding of the subframe; wherein, the fourth region is the junction of the second reinforcing component 50 with the third beam component 30 and the third short unit 25, and the fourth region is the outer surface of the subframe.

[0085] Those skilled in the art will understand that the above embodiments are specific examples of implementing this disclosure, and in practical applications, various changes can be made in form and detail without departing from the scope of this disclosure.

Claims

1. A subframe, characterized in that, The subframe includes: The first beam assembly includes a first beam unit, a first long unit, and a first short unit; the first short unit and the first long unit are sequentially connected to one end of the first beam unit along a first direction of the thickness of the first beam unit; the first long unit extends beyond the first short unit at the end away from the first beam unit. The second beam assembly includes a second beam unit, a second long unit, a second short unit, and a third long unit; the second long unit and the second short unit are sequentially connected to one end of the second beam unit along the first direction of the thickness of the second beam unit; the second long unit extends beyond the second short unit at the end away from the second beam unit; the third long unit is connected to the end of the second beam unit away from the second long unit; a portion of the second long unit is located within the enclosing space of the first long unit, or a portion of the first long unit is located within the enclosing space of the second long unit; the first short unit is connected to the second long unit; the second short unit is connected to the first long unit. The third beam assembly, a portion of which is located within the enclosing space of the third long unit, or a portion of which is located within the enclosing space of the third beam assembly; the third long unit is connected to the third beam assembly.

2. A subframe according to claim 1, characterized in that, A portion of the second long unit is located within the space enclosed by the first long unit.

3. A subframe according to claim 2, characterized in that, Part of the first short unit is located within the space enclosed by the second long unit.

4. A subframe according to claim 3, characterized in that, The first short unit includes a first short middle plate and two first short side plates; one first short side plate, the first short middle plate, and the other first short side plate are connected in sequence; the first short middle plate and the first short side plates are respectively connected to the end of the first beam unit near the first long unit; the first short middle plate, the first short side plates, and the first long unit are arranged in sequence along the first direction; the minimum distance between the two first short side plates on their respective farthest sides gradually decreases along the direction from the first beam unit to the second beam unit; a portion of the first short side plates are disposed within the enclosing space of the first long unit; the respective farthest sides of the two first short side plates are connected to the first long unit; the respective farthest sides of the two first short side plates and the respective farthest side of the first short middle plate are disposed within the enclosing space of the second long unit; the respective farthest sides of the two first short side plates and the respective farthest side of the first short middle plate are connected to the second long unit.

5. A subframe according to claim 2, characterized in that, Part of the second short unit is located within the space enclosed by the first long unit.

6. A subframe according to claim 1, characterized in that, The subframe also includes a second reinforcing component; The second beam assembly further includes a third short unit; the third short unit is connected to the end of the second beam assembly away from the second long unit; the third long unit and the third short unit are arranged sequentially along the first direction of the thickness of the second beam unit; the third long unit and the second reinforcing component are sequentially connected to one end of the third beam assembly along the first direction; a portion of the third beam assembly and at least a portion of the third short units are respectively disposed within the enclosing space of the third long unit and the second reinforcing component; a portion of the third long unit is located within the enclosing space of the second reinforcing component, or a portion of the second reinforcing component is located within the enclosing space of the third long unit; the third beam assembly is connected to the third long unit and the second reinforcing component respectively; the second reinforcing component is connected to the third long unit.

7. A subframe according to claim 3, characterized in that, The subframe also includes a first reinforcing component; the first reinforcing component includes a first abutting portion, a supporting portion, and a second abutting portion; the first abutting portion, the supporting portion, and the second abutting portion are connected in sequence; the first abutting portion is connected to the side of the first long unit near the second long unit; the second abutting portion is connected to the side of the second long unit near the first long unit; The second beam assembly also includes a clearance opening; the clearance opening extends from the side of the second long unit away from the first long unit to the side of the second long unit closer to the first long unit; at least a portion of the second abutment portion is located within the projection area of ​​the clearance opening along the first direction.

8. An assembly system, characterized in that, The assembly system includes a subframe as described in any one of claims 1 to 7, and the assembly system further includes: Assembly components, including support units, connection units, and handling units; The assembly state of the assembly system includes the first beam assembly and the third beam assembly being detachably connected to the support unit, the transport unit driving the second beam assembly to move, and the connection unit connecting the second beam assembly to the junctions of the first beam assembly and the third beam assembly.

9. An assembly method, characterized in that, The assembly method is applied to the assembly system described in claim 8, and the assembly method includes: The first beam assembly and the third beam assembly are positioned on the support unit; wherein, the positioning is completed by the first beam assembly and the third beam assembly being spaced apart, and the first short unit and the first long unit being arranged sequentially along the first direction; The second beam assembly is moved along the first direction to a combined state; wherein, the combined state includes the second long unit and the second short unit being arranged sequentially along the first direction; a portion of the second long unit is located within the enclosing space of the first long unit, or a portion of the first long unit is located within the enclosing space of the second long unit; a portion of the third beam assembly is located within the enclosing space of the third long unit, or a portion of the third long unit is located within the enclosing space of the third beam assembly; The connecting unit connects the second beam assembly to the junctions of the first beam assembly and the third beam assembly.

10. An assembly method according to claim 9, characterized in that, The subframe also includes a second reinforcing assembly; the second beam assembly also includes a third short unit; the third short unit is connected to the end of the second beam unit away from the second long unit; The positioning process also includes a portion of the third beam assembly being located within the enclosing space of the second reinforcing assembly; the third beam assembly and the second reinforcing assembly are arranged sequentially along the first direction; The combined state includes the second long unit and the second short unit being arranged sequentially along the first direction; a portion of the second long unit is located within the enclosing space of the first long unit; a portion of the third beam assembly and at least a portion of the third short unit are located within the enclosing space of the third long unit and the second reinforcing assembly; the third long unit and the third short unit are arranged sequentially along the first direction of the thickness of the second beam unit; The connection unit connects the second beam assembly to the junctions of the first beam assembly and the third beam assembly, respectively, including: The connecting unit welds to the first region; wherein, the first region is the junction of the third long unit with the third beam assembly and the second reinforcing assembly; The connecting unit welds to the second region; wherein, the second region is the junction of the second long unit with the first short unit and the first long unit respectively; The support unit flips the subframe to the first long unit and the first short unit, which are arranged sequentially along the first direction; The connecting unit welds the third region; wherein the third region is the junction of the first long unit and the second short unit. The connecting unit welds the fourth region to the combined state; wherein the fourth region is the junction of the second reinforcing component with the third beam component and the third short unit.

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