Aluminum alloy hollow front cabin structure

Abstract

The utility model relates to an aluminum alloy hollow front cabin structure which comprises a cabin left longitudinal beam, a cabin right longitudinal beam, a cabin front middle cross beam and a cabin rear middle cross beam, a left weight reduction cavity is formed in the cabin left longitudinal beam, and a right weight reduction cavity is formed in the cabin right longitudinal beam. The cabin front middle cross beam and the cabin rear middle cross beam are parallel and arranged between the cabin left longitudinal beam and the cabin right longitudinal beam in a front-back spaced mode, and the two ends of the cabin front middle cross beam and the two ends of the cabin rear middle cross beam are fixedly connected to the cabin left longitudinal beam and the cabin right longitudinal beam respectively. According to the front cabin, the technical problem that the weight of the front cabin cannot be reduced while the structural strength and the yield of finished products of the front cabin cannot be ensured by an existing integral or integrated design mode can be solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the lightweight technology field of automobile lower body, especially relates to an aluminum alloy hollow front engine compartment structure. BACKGROUND

[0002] With the rapid development of new energy vehicles, automobile lightweight has become one of the focuses of the industry. In order to improve the endurance mileage and energy efficiency, the lightweight design of the vehicle body structure is particularly important. As a high-quality lightweight material, aluminum alloy has been widely used in the manufacturing of automobile parts due to its excellent mechanical properties, corrosion resistance and processability. Among them, aluminum alloy casting technology gradually occupies an important position in automobile manufacturing due to its high efficiency, precision and batch production advantages.

[0003] At present, the automobile front engine compartment structure generally adopts a steel or aluminum alloy integral design by welding and bolt connection. This structure performs well in strength, rigidity and impact resistance, but due to its use of splicing and welding process, it has the problems of complex processing, high manufacturing cost and large weight, which is difficult to fully meet the requirements of new energy vehicles for lightweight. In addition, the emerging integrated casting design often has various manufacturing problems at the production end, and the good product rate is difficult to improve. The scrapped parts due to quality problems increase the customer's use cost, and are not flexible enough in maintenance and replacement, increasing the maintenance cost. SUMMARY

[0004] The utility model provides an aluminum alloy hollow front engine compartment structure to solve the technical problem that the existing integral or integrated design method cannot reduce the weight of the front engine compartment while ensuring the strength of the front engine compartment structure and the finished product good product rate.

[0005] The technical solution of the utility model to solve the above technical problems is as follows:

[0006] An aluminum alloy hollow front engine compartment structure, comprising a left engine compartment longitudinal beam, a right engine compartment longitudinal beam, a front engine compartment middle beam and a rear engine compartment middle beam, the left engine compartment longitudinal beam is internally provided with a left weight reduction cavity, the right engine compartment longitudinal beam is internally provided with a right weight reduction cavity, the front engine compartment middle beam and the rear engine compartment middle beam are parallel and arranged between the left engine compartment longitudinal beam and the right engine compartment longitudinal beam, and both ends are respectively fixedly connected to the left engine compartment longitudinal beam and the right engine compartment longitudinal beam.

[0007] The utility model discloses beneficial effect is: through setting in the left weight reduction cavity of cabin left stringer and setting in the right weight reduction cavity of cabin right stringer, realize the weight reduction of whole front cabin, and further make it have good lightweight effect, and reduce material cost, and simultaneously because the opening mode of left weight reduction cavity and right weight reduction cavity is integrally formed, makes cabin left stringer and cabin right stringer respectively from an integral whole, has good overall stability, avoids the mode of being constituted left weight reduction cavity and right weight reduction cavity under by multiple structure group splicing, the problem that the strength of the junction is difficult to guarantee is produced, realizes the lightweight front cabin with good structural strength and structural stability to improve the technical problem that the design mode of existing integral type or integral type cannot reduce the weight of front cabin while guaranteeing the structural strength of front cabin, finished product yield.

[0008] On the basis of the above technical scheme, the utility model further can make improvement as follows.

[0009] Further, it further includes two left insertion sections and two right insertion sections, one end of the two left insertion sections is fixedly connected to the right side of the cabin left stringer, one end of the two right insertion sections is fixedly connected to the left side of the cabin right stringer, and the other end of the cabin front middle cross beam and the cabin rear middle cross beam is respectively inserted into the other end of the two left insertion sections and the other end of the two right insertion sections, the two left insertion sections and the two right insertion sections are both through channel structures, and one end of the two left insertion sections is communicated with the left weight reduction cavity, and one end of the two right insertion sections is communicated with the right weight reduction cavity.

[0010] The beneficial effect of the above further scheme is that by fixing two left insertion sections on the right side of the cabin left stringer and forming a through hole structure connected to the left weight reduction cavity by the left insertion sections, a sand discharge hole structure for sand core discharge is formed, and by fixing two right insertion sections on the left side of the cabin right stringer and forming a through hole structure connected to the right weight reduction cavity by the right insertion sections, a sand discharge hole structure for sand core discharge is formed.

[0011] Further, the other end of the two left insertion sections is fixed with a left positioning section, and the two left positioning sections are respectively inserted into one end of the cabin front middle cross beam and the cabin rear middle cross beam, and the other end of the two right insertion sections is fixed with a right positioning section, and the two right positioning sections are respectively inserted into the other end of the cabin front middle cross beam and the cabin rear middle cross beam.

[0012] The beneficial effect of the above further scheme is that the split type cabin left stringer, cabin right stringer, cabin front middle cross beam and cabin rear middle cross beam are connected to form an integral type, and the left positioning section and the right positioning section are respectively used to form the installation and positioning of the cabin left stringer and the cabin right stringer, so as to quickly complete the installation.

[0013] Further, the front side of the left cabin longitudinal beam is provided with a left opening communicating with the left weight-reducing cavity, and the front side of the right cabin longitudinal beam is provided with a right opening communicating with the right weight-reducing cavity.

[0014] The beneficial effect of the further scheme is that the left opening can further reduce the weight of the left cabin longitudinal beam, and the left weight-reducing cavity is completely discharged by the left opening arranged at the front end of the left cabin longitudinal beam; and the right opening can further reduce the weight of the right cabin longitudinal beam, and the right weight-reducing cavity is completely discharged by the right opening arranged at the front end of the right cabin longitudinal beam.

[0015] Further, the lower side of the left cabin longitudinal beam is provided with a plurality of left sand leakage holes each communicating with the left weight-reducing cavity, and the lower side of the right cabin longitudinal beam is provided with a plurality of right sand leakage holes each communicating with the right weight-reducing cavity.

[0016] The beneficial effect of the further scheme is that the left sand leakage hole and the right sand leakage hole can further reduce the weight of the left cabin longitudinal beam and the right cabin longitudinal beam respectively, improve the fuel economy and driving performance of the vehicle; at the same time, the sand particles and sundries in the left weight-reducing cavity and the right weight-reducing cavity during use can be timely discharged through the left sand leakage hole and the right sand leakage hole respectively, so that the left weight-reducing cavity and the right weight-reducing cavity are kept clean and unobstructed, thereby avoiding the problems of imbalance and vibration of the left cabin longitudinal beam and the right cabin longitudinal beam caused by sand accumulation.

[0017] Further, the left side of the left cabin longitudinal beam is fixedly connected with a left mesh rib, and the upper side of the left cabin longitudinal beam is fixedly connected with a left reinforcing rib; and the right side of the right cabin longitudinal beam is fixedly connected with a right mesh rib, and the upper side of the right cabin longitudinal beam is fixedly connected with a right reinforcing rib.

[0018] The beneficial effect of the further scheme is that the left mesh rib and the left reinforcing rib can improve the structural strength of the left cabin longitudinal beam, and the right mesh rib and the right reinforcing rib can improve the structural strength of the right cabin longitudinal beam.

[0019] Further, the front wall plate is fixedly connected to the front cabin middle beam and the rear cabin middle beam at the front and rear ends of the front wall plate.

[0020] The beneficial effect of the further scheme is that the front wall plate can connect the front cabin middle beam and the rear cabin middle beam to improve the structural strength, and can be used as a mounting base for related parts.

[0021] Further, at least one side of the front wall plate is fixedly connected with a plurality of reinforcing plates, and the plurality of reinforcing plates are fixedly connected to the front cabin middle beam and the rear cabin middle beam at the same time.

[0022] The beneficial effect of the further scheme is that the structural strength of the front wall plate is reinforced by the plurality of reinforcing plates, and the structural strength of the front wall plate connected with the front cabin middle beam and the rear cabin middle beam is improved.

[0023] Further, the front cabin middle beam is provided with a front weight-reducing hole along the length direction thereof, and the rear cabin middle beam is provided with a rear weight-reducing hole along the length direction thereof.

[0024] The beneficial effect of the further scheme is that the weight of the front cabin middle beam is further reduced by the front weight-reducing hole, and the weight of the rear cabin middle beam is reduced by the rear weight-reducing hole, so that the structure of the whole front cabin is lightened.

[0025] Further, the front cabin middle beam is provided with a plurality of front insertion holes, and a plurality of auxiliary frame fixing members are fixedly connected in the front weight-reducing hole, and each auxiliary frame fixing member is in communication with the plurality of front insertion holes.

[0026] The beneficial effect of the further scheme is that the plurality of auxiliary frame fixing members fixedly connected with the front cabin middle beam are connected with the auxiliary frame, so that a multi-point distributed mounting support structure is formed, and the whole front cabin is stably mounted. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 is a perspective view of the present application;

[0028] Figure 2 is a perspective view of the present application Figure 1 is a top view of the first angle of the present application;

[0029] Figure 3 is a top view of the second angle of the present application Figure 1

[0030] Figure 4 is a partial sectional view of a left cabin longitudinal beam of the present application;

[0031] Figure 5 is a partial sectional view of a right cabin longitudinal beam of the present application;

[0032] Figure 6 is a partial sectional view of the present application;

[0033] Figure 7 is a partial sectional view of the present application Figure 6 is a partial enlarged view of A part of the present application;

[0034] Figure 8 is a partial structural schematic view of the present application.

[0035] In the drawings, the components represented by each reference numeral are listed as follows:

[0036] ​1, cabin left longitudinal beam; 11, left weight reduction cavity; 12, left plug-in section; 121, left positioning section; 13, left opening; 14, left sand leakage hole; 15, left mesh rib; 16, left reinforcing rib;

[0037] 2, cabin right longitudinal beam; 21, right weight reduction cavity; 22, right plug-in section; 221, right positioning section; 23, right opening; 24, right sand leakage hole; 25, right mesh rib; 26, right reinforcing rib;

[0038] 3, cabin front middle cross beam; 31, front weight reduction hole; 32, front plug hole;

[0039] 4, cabin rear middle cross beam; 41, rear weight reduction hole;

[0040] 5, front wall plate; 51, steering input shaft through hole; 52, air conditioner air port;

[0041] 6, reinforcing plate;

[0042] 7, subframe fixing part; 71, nut plate; 72, sleeve. DETAILED DESCRIPTION

[0043] The principles and characteristics of the present application are described below in conjunction with the accompanying drawings, and the examples are only used to explain the present application and are not used to limit the scope of the present application.

[0044] Example 1

[0045] As Figures 1 to 5 An aluminum alloy hollow front cabin structure, comprising a cabin left longitudinal beam 1, a cabin right longitudinal beam 2, a cabin front middle cross beam 3 and a cabin rear middle cross beam 4, the cabin left longitudinal beam 1 is provided with a left weight reduction cavity 11 inside, the cabin right longitudinal beam 2 is provided with a right weight reduction cavity 21 inside, the cabin front middle cross beam 3 and the cabin rear middle cross beam 4 are parallel and arranged between the cabin left longitudinal beam 1 and the cabin right longitudinal beam 2, and both ends are respectively fixedly connected to the cabin left longitudinal beam 1 and the cabin right longitudinal beam 2.

[0046] The beneficial effects of the embodiment are: by setting the left weight reduction cavity 11 on the cabin left longitudinal beam 1 and the right weight reduction cavity 21 on the cabin right longitudinal beam 2, the weight of the entire front cabin is reduced, thereby achieving good lightweight effect, and reducing material cost. At the same time, due to the integrated setting mode of the left weight reduction cavity 11 and the right weight reduction cavity 21, the cabin left longitudinal beam 1 and the cabin right longitudinal beam 2 are integrally formed, which has good overall stability, avoids the problem that the connection strength is difficult to guarantee in the mode of setting the left weight reduction cavity 11 and the right weight reduction cavity 21 by multiple structure combinations, and realizes the lightweight front cabin with good structural strength and stability, thereby solving the technical problem that the existing overall or integrated design mode cannot reduce the weight of the front cabin while ensuring the structural strength of the front cabin and the yield rate of the finished product.

[0047] In addition, by separately setting and processing the cabin left longitudinal beam 1, the cabin right longitudinal beam 2, the cabin front middle cross beam 3 and the cabin rear middle cross beam 4, and then welding and connecting the two ends of the cabin front middle cross beam 3 and the cabin rear middle cross beam 4 with the cabin left longitudinal beam 1 and the cabin right longitudinal beam 2 respectively, the process complexity is reduced, the functional components can be arranged more flexibly, the space utilization rate is higher, and it is more suitable for the arrangement requirements of batteries and powertrains of new energy passenger vehicles; and the split structure is more easily adapted to the needs of different wheelbases and track widths of different vehicle models, improving the universality and customization ability of the vehicle, reducing the development difficulty of the vehicle chassis, and shortening the development cycle of new vehicle models.

[0048] Due to the setting of the left weight reduction cavity 11 and the right weight reduction cavity 21, the thickness of the cabin left longitudinal beam 1 and the cabin right longitudinal beam 2 is reduced, so that the formed structure is more accurate in various indicators and easy to form when pouring and casting, which is beneficial to reduce casting defects and improve the overall processing quality.

[0049] As a specific scheme of the above embodiment, the left weight reduction cavity 11 extends along the length direction of the cabin left longitudinal beam 1, and the right weight reduction cavity 21 extends along the length direction of the cabin right longitudinal beam 2, so as to ensure that the cabin left longitudinal beam 1 and the cabin right longitudinal beam 2 have sufficient weight reduction degree, thereby improving the lightweight effect of the parts and the whole vehicle.

[0050] On the basis of the above embodiment, the inner wall thickness of the cabin left longitudinal beam 1 and the cabin right longitudinal beam 2 is uniform, so that the front cabin has good structural stability, and the strength and safety in use are improved.

[0051] Embodiment 2

[0052] As Figures 1 to 7The aluminum alloy hollow front cabin structure further comprises two left insertion sections 12 and two right insertion sections 22, one end of the two left insertion sections 12 is fixedly connected to the right side of the cabin left longitudinal beam 1, one end of the two right insertion sections 22 is fixedly connected to the left side of the cabin right longitudinal beam 2, and the other end of the cabin front middle cross beam 3 and the cabin rear middle cross beam 4 is respectively inserted into the other end of the two left insertion sections 12 and the other end of the two right insertion sections 22, the two left insertion sections 12 and the two right insertion sections 22 are both through channel structures, and one end of the two left insertion sections 12 is communicated with the left weight reduction cavity 11, and one end of the two right insertion sections 22 is communicated with the right weight reduction cavity 21.

[0053] The beneficial effect of the preferred scheme in the above embodiment is that two left insertion sections 12 are fixed on the right side of the cabin left longitudinal beam 1, and the left insertion sections 12 form a through hole structure communicating with the left weight reduction cavity 11, so as to form a sand discharge hole structure for the sand core, and at the same time, two right insertion sections 22 are fixed on the left side of the cabin right longitudinal beam 2, and the right insertion sections 22 form a through hole structure communicating with the right weight reduction cavity 21, so as to form a sand discharge hole structure for the sand core.

[0054] On the basis of the above embodiment, the upper side of the two left insertion sections 12 and the two right insertion sections 22 is fixedly connected with a reinforcing rib, the reinforcing rib on the two left insertion sections 12 is fixedly connected to the cabin left longitudinal beam 1, and the reinforcing rib on the two right insertion sections 22 is fixedly connected to the cabin right longitudinal beam 2, so as to improve the installation structure strength of the two left insertion sections 12 and the two right insertion sections 22.

[0055] Embodiment 3

[0056] As Figures 1 to 7 On the basis of embodiments 1 and 2, the other end of the two left insertion sections 12 is fixedly connected with a left positioning section 121, the two left positioning sections 121 are respectively inserted into one end of the cabin front middle cross beam 3 and the cabin rear middle cross beam 4, the other end of the two right insertion sections 22 is fixedly connected with a right positioning section 221, and the two right positioning sections 221 are respectively inserted into the other end of the cabin front middle cross beam 3 and the cabin rear middle cross beam 4.

[0057] The beneficial effect of the preferred scheme in the above embodiment is that the split type cabin left longitudinal beam 1, cabin right longitudinal beam 2, cabin front middle cross beam 3 and cabin rear middle cross beam 4 are connected to form an integrated type, and the installation positioning of the cabin left longitudinal beam 1 and the cabin right longitudinal beam 2 is formed by the left positioning section 121 and the right positioning section 221 respectively, so as to quickly complete the installation.

[0058] The cross sections of the two left positioning segments 121 and the two right positioning segments 221 are all polygons, which are shown as rectangles in the figure, so that the cabin front middle beam 3 and the cabin rear middle beam 4 will not rotate when the two left positioning segments 121 and / or the two right positioning segments 221 are respectively inserted into one end of the cabin front middle beam 3 and the cabin rear middle beam 4.

[0059] Embodiment 4

[0060] As Figure 1 and Figure 2 On the basis of Embodiments 1-3, the front side of the cabin left longitudinal beam 1 is provided with a left opening 13 communicating with the left weight-reducing cavity 11, and the front side of the cabin right longitudinal beam 2 is provided with a right opening 23 communicating with the right weight-reducing cavity 21.

[0061] The beneficial effects of the preferred solutions in the above embodiments are that the left opening 13 can further reduce the weight of the cabin left longitudinal beam 1, and the left opening 13 is provided at the front end of the cabin left longitudinal beam 1 so as to completely discharge the sand core in the left weight-reducing cavity 11, and the right opening 23 can further reduce the weight of the cabin right longitudinal beam 2, and the right opening 23 is provided at the front end of the cabin right longitudinal beam 2 so as to completely discharge the sand core in the right weight-reducing cavity 21.

[0062] Embodiment 5

[0063] As Figure 1 and Figure 2 On the basis of Embodiments 1-4, the lower side of the cabin left longitudinal beam 1 is provided with a plurality of left sand leakage holes 14 each communicating with the left weight-reducing cavity 11, and the lower side of the cabin right longitudinal beam 2 is provided with a plurality of right sand leakage holes 24 each communicating with the right weight-reducing cavity 21.

[0064] The beneficial effects of the preferred solutions in the above embodiments are that the left sand leakage holes 14 and the right sand leakage holes 24 can further reduce the weight of the cabin left longitudinal beam 1 and the cabin right longitudinal beam 2 respectively, improve the fuel economy and driving performance of the vehicle, and timely discharge the sand particles and sundries in the left weight-reducing cavity 11 and the right weight-reducing cavity 21 respectively, so as to keep the left weight-reducing cavity 11 and the right weight-reducing cavity 21 clean and unobstructed, thereby avoiding the problems of imbalance and vibration of the cabin left longitudinal beam 1 and the cabin right longitudinal beam 2 caused by the accumulation of sand particles.

[0065] As a specific solution of the above embodiments, the plurality of left sand leakage holes 14 are arranged at intervals along the length direction of the cabin left longitudinal beam 1, and the number thereof can be three, four, five, etc.

[0066] The plurality of right sand leakage holes 24 are arranged at intervals along the length direction of the cabin right longitudinal beam 2, and the number thereof can be three, four, five, etc.

[0067] On the basis of the above-mentioned embodiments, a hole rib is integrally formed at the opening of each left sand leakage hole 14 and right sand leakage hole 24, the thickness of the hole rib is 2-3mm, and the width of the hole rib is 2-4mm, so as to improve the local structural strength.

[0068] Embodiment 6

[0069] As Figures 1 to 3 On the basis of embodiments 1-5, the left side of the cabin left longitudinal beam 1 is fixedly connected with the left net texture rib 15, and the upper side of the cabin left longitudinal beam 1 is fixedly connected with the left reinforcing rib 16, and the right side of the cabin right longitudinal beam 2 is fixedly connected with the right net texture rib 25, and the upper side of the cabin right longitudinal beam 2 is fixedly connected with the right reinforcing rib 26.

[0070] The beneficial effect of the preferred scheme in the above-mentioned embodiments is to improve the structural strength of the cabin left longitudinal beam 1 through the left net texture rib 15 and the left reinforcing rib 16, and to improve the structural strength of the cabin right longitudinal beam 2 through the right net texture rib 25 and the right reinforcing rib 26.

[0071] Embodiment 7

[0072] As Figures 1 to 8 On the basis of embodiments 1-6, the aluminum alloy hollow front cabin structure further comprises a front wall plate 5, and the front and rear ends of the front wall plate 5 are fixedly connected to the cabin front middle beam 3 and the cabin rear middle beam 4 respectively.

[0073] The beneficial effect of the preferred scheme in the above-mentioned embodiments is to improve the structural strength by connecting the cabin front middle beam 3 and the cabin rear middle beam 4 through the front wall plate 5, and to serve as the installation basis of related parts.

[0074] The front wall plate 5 is made of appropriate aluminum alloy or steel plate material, and is formed by stamping process. The formed front wall plate is subjected to surface treatment and finishing to ensure the surface quality and dimensional accuracy.

[0075] On the basis of the above-mentioned embodiments, a deflector input shaft through hole 51 and a plurality of air conditioner air outlets 52 are provided through the front wall plate 5, so as to install the deflector input shaft through the deflector input shaft through hole 51, and to pass air through the air conditioner air outlets 52.

[0076] Embodiment 8

[0077] As Figures 1 to 8 On the basis of embodiments 1-7, at least one side of the front wall plate 5 is fixedly connected with a plurality of reinforcing plates 6, and the plurality of reinforcing plates 6 are fixedly connected to the cabin front middle beam 3 and the cabin rear middle beam 4 at the same time.

[0078] The beneficial effect of the preferred scheme in the above-mentioned embodiments is to strengthen the structural strength of the front wall plate 5 through the plurality of reinforcing plates 6, and to improve the structural strength of the front wall plate 5 connected to the cabin front middle beam 3 and the cabin rear middle beam 4 respectively.

[0079] Each of the reinforcing plates 6 is made of a hot-formed high-strength steel plate material. The front wall plate 5 and the reinforcing plate 6 can be fixedly connected by using two connection processes, FDS (self-piercing riveting) and SPR (spin pressure riveting), to ensure the reliability and durability of the connection.

[0080] As a specific solution of the embodiment, the plurality of reinforcing plates 6 are simultaneously fixedly connected to the lower side of the front wall plate 5, or the plurality of reinforcing plates 6 are simultaneously fixedly connected to the upper side of the front wall plate 5, or the plurality of reinforcing plates 6 are respectively fixedly connected to the upper and lower sides of the front wall plate 5.

[0081] Embodiment 9

[0082] As Figures 1 to 8 On the basis of Embodiments 1-8, the front cabin middle beam 3 is provided with a front weight-reducing hole 31 through the length direction, and the rear cabin middle beam 4 is provided with a rear weight-reducing hole 41 through the length direction.

[0083] The beneficial effect of the preferred solution in the above embodiment is to further reduce the weight of the front cabin middle beam 3 through the front weight-reducing hole 31, and to reduce the weight of the rear cabin middle beam 4 through the rear weight-reducing hole 41, thereby achieving structural weight reduction of the entire front cabin.

[0084] On the basis of the above embodiment, one of the left positioning sections 121 is adapted and inserted into the front weight-reducing hole 31 at one end of the front cabin middle beam 3, and the other left positioning section 121 is adapted and inserted into the rear weight-reducing hole 41 at one end of the rear cabin middle beam 4. One of the right positioning sections 221 is adapted and inserted into the front weight-reducing hole 31 at the other end of the front cabin middle beam 3, and the other right positioning section 221 is adapted and inserted into the rear weight-reducing hole 41 at the other end of the rear cabin middle beam 4.

[0085] Embodiment 10

[0086] As Figures 1 to 8 On the basis of Embodiments 1-9, the front cabin middle beam 3 is provided with a plurality of front insertion holes 32, and a plurality of auxiliary frame fixing members 7 are fixedly connected in the front weight-reducing hole 31, and each auxiliary frame fixing member 7 is in communication with the plurality of front insertion holes 32.

[0087] The beneficial effect of the preferred solution in the above embodiment is to form a multi-point distributed mounting support structure by connecting the plurality of auxiliary frame fixing members 7 fixedly connected to the front cabin middle beam 3 with the auxiliary frame, thereby achieving stable installation of the entire front cabin.

[0088] The plurality of front insertion holes 32 are simultaneously and penetratively formed on the lower side of the front middle beam 3 of the cabin. As one of the parallel schemes, the plurality of front insertion holes 32 are simultaneously and penetratively formed on the upper side of the front middle beam 3 of the cabin; as the second parallel scheme, the plurality of front insertion holes 32 are simultaneously and penetratively formed on the upper and lower sides of the front middle beam 3 of the cabin.

[0089] On the basis of the above-mentioned embodiments, each auxiliary frame fixing member 7 comprises a nut plate 71 and a sleeve 72 fixedly connected to the nut plate 71. The nut plate 71 is fixedly connected to the corresponding front middle beam 3 of the cabin, and each sleeve 72 is provided with an internally threaded hole, and the internally threaded holes of each sleeve 72 are in one-to-one communication with the front insertion holes 32.

[0090] The nut plate 71 can be fixed by riveting and pressing through a screw.

[0091] When the front middle beam 3 and the rear middle beam 4 of the cabin are connected and installed with the auxiliary frame, one part of the nut is passed through the front insertion hole 32 and is screwed with the corresponding sleeve 72.

[0092] By forming the left weight-reducing cavity 11, the left opening 13 and the plurality of left sand leakage holes 14, when the cabin left longitudinal beam 1 is manufactured, a filling sand core is arranged on the pouring mold, so that the filling sand core is molded in the left weight-reducing cavity 11 when the material of the cabin left longitudinal beam 1 is poured, and the filling sand core is wrapped therein. After the casting of the cabin left longitudinal beam 1 is completed, the sand in the filling sand core can be discharged through the sand discharge hole arranged thereon and in communication with the left weight-reducing cavity 11, so as to finally obtain the lightweight cabin left longitudinal beam 1, and promote the lightweight production of such parts.

[0093] By forming the right weight-reducing cavity 21, the right opening 23 and the plurality of right sand leakage holes 24, when the cabin right longitudinal beam 2 is manufactured, a filling sand core is arranged on the pouring mold, so that the filling sand core is molded in the right weight-reducing cavity 21 when the material of the cabin right longitudinal beam 2 is poured, and the filling sand core is wrapped therein. After the casting of the cabin right longitudinal beam 2 is completed, the sand in the filling sand core can be discharged through the sand discharge hole arranged thereon and in communication with the right weight-reducing cavity 21, so as to finally obtain the lightweight cabin right longitudinal beam 2, and promote the lightweight production of such parts.

[0094] In the description of the utility model, it is understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like is the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the utility model.

[0095] In addition, the terms "first" and "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first" and "second" can explicitly or implicitly include at least one of the features. In the description of the utility model, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise specifically limited.

[0096] In the utility model, unless otherwise specifically defined and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication or interaction relationship between two elements, unless otherwise specifically limited. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0097] In the utility model, unless otherwise specifically defined and limited, the first feature "on" or "under" the second feature can be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature "above", "above" and "above" the second feature can be that the first feature is directly above or obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature can be that the first feature is directly below or obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0098] In the description of the present specification, the description referring to the terms "one embodiment", "some embodiments", "an example", "a specific example", or "some examples" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any appropriate manner in any one or more embodiments or examples. Furthermore, the person skilled in the art can combine and combine the different embodiments or examples described in the present specification and the features of the different embodiments or examples, without contradiction.

[0099] Although the embodiments of the present application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present application, and the person skilled in the art can make changes, modifications, replacements and modifications to the above embodiments within the scope of the present application.

Claims

1. An aluminum alloy hollow forebody structure, characterized by, The cabin left side frame (1) is internally provided with a left weight reduction cavity (11), the cabin right side frame (2) is internally provided with a right weight reduction cavity (21), the cabin front middle cross beam (3) and the cabin rear middle cross beam (4) are parallel and are arranged between the cabin left side frame (1) and the cabin right side frame (2) in a front and back interval, and both ends are fixedly connected to the cabin left side frame (1) and the cabin right side frame (2) respectively.

2. The aluminum alloy hollow forecabin structure according to claim 1, characterized by Further comprising two left insertion sections (12) and two right insertion sections (22), one end of the two left insertion sections (12) is fixedly connected to the right side of the cabin left side frame (1), one end of the two right insertion sections (22) is fixedly connected to the left side of the cabin right side frame (2), and the other end of the cabin front middle cross beam (3) and the cabin rear middle cross beam (4) is inserted into the other end of the two left insertion sections (12) and the other end of the two right insertion sections (22) respectively, the two left insertion sections (12) and the two right insertion sections (22) are both through channel structures, and one end of the two left insertion sections (12) is communicated with the left weight reduction cavity (11), one end of the two right insertion sections (22) is communicated with the right weight reduction cavity (21).

3. The aluminum alloy hollow forecabin structure according to claim 2, characterized by The other end of the two left insertion sections (12) is fixedly provided with a left positioning section (121), the left positioning section (121) is inserted into one end of the cabin front middle cross beam (3) and the cabin rear middle cross beam (4) respectively, the other end of the two right insertion sections (22) is fixedly provided with a right positioning section (221), and the right positioning section (221) is inserted into the other end of the cabin front middle cross beam (3) and the cabin rear middle cross beam (4) respectively.

4. The aluminum alloy hollow forebody structure of claim 1, wherein The front side of the cabin left side frame (1) is provided with a left opening (13) communicated with the left weight reduction cavity (11), and the front side of the cabin right side frame (2) is provided with a right opening (23) communicated with the right weight reduction cavity (21).

5. The aluminum alloy hollow forebody structure of claim 1, wherein The lower side of the cabin left side frame (1) is provided with a plurality of left sand leakage holes (14) communicated with the left weight reduction cavity (11), and the lower side of the cabin right side frame (2) is provided with a plurality of right sand leakage holes (24) communicated with the right weight reduction cavity (21).

6. The aluminum alloy hollow forecabin structure according to claim 1, characterized by The left side of the cabin left side frame (1) is fixedly connected with a left net texture rib (15), and the upper side is fixedly connected with a left reinforcing rib (16), and the right side of the cabin right side frame (2) is fixedly connected with a right net texture rib (25), and the upper side is fixedly connected with a right reinforcing rib (26).

7. The aluminum alloy hollow forecabin structure according to any one of claims 1 to 6, characterized by, Further comprising a front wall plate (5), the front and rear ends of the front wall plate (5) are fixedly connected to the cabin front middle cross beam (3) and the cabin rear middle cross beam (4) respectively.

8. The aluminum alloy hollow forecabin structure according to claim 7, characterized by At least one side of the front wall plate (5) is fixedly connected with a plurality of reinforcing plates (6), and the plurality of reinforcing plates (6) are fixedly connected to the cabin front middle cross beam (3) and the cabin rear middle cross beam (4) simultaneously.

9. The aluminum alloy hollow forecabin structure according to any one of claims 1 to 6, characterized by, The front cabin middle cross beam (3) is provided with a front lightening hole (31) through along the length direction, and the rear cabin middle cross beam (4) is provided with a rear lightening hole (41) through along the length direction.

10. The aluminum alloy hollow forecabin structure according to claim 9, characterized by The front cabin middle cross beam (3) is provided with a plurality of front insertion holes (32) through, and a plurality of auxiliary frame fixing members (7) are fixedly connected in the front lightening hole (31), and each auxiliary frame fixing member (7) is in one-to-one correspondence with the plurality of front insertion holes (32).

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