Die-casting die assembly, rear floor assembly and vehicle

Abstract

The utility model discloses a die-casting die assembly, a rear floor assembly and a vehicle. The die-casting die assembly comprises a first die body and a second die body, a cavity is defined by the first mold body and the second mold body; the sliding block assemblies are arranged at the two ends of the cavity, each sliding block assembly comprises a main sliding block and an auxiliary sliding block, and the auxiliary sliding blocks are movably arranged in the main sliding blocks in the Y direction in the direction away from the cavity. According to the die-casting die assembly, due to the fact that the main sliding block and the auxiliary sliding block are arranged, a product structure which cannot be formed under the condition of a single sliding block is achieved, the production difficulty of a rear floor assembly is lowered, the situation of casting defects of a rear floor body is avoided, and the quality of die-casting products is improved; according to the die-casting die assembly, it is guaranteed that the material thickness of the assembling area of the rear floor assembly is consistent, the product quality of the rear floor assembly is guaranteed, the weight distribution of a vehicle is optimized, the structural strength of important mounting points of a body in white is guaranteed, and the structural design of the die-casting die assembly is ingenious.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicle manufacturing, in particular to a die-casting mold assembly, a rear floor assembly and a vehicle. Background Technique

[0002] It is pointed out in the related technology that in order to pursue lightweight for the automotive body-in-white, lightweight metals, such as aluminum alloy, are gradually becoming the preferred application for lightweighting of body structural parts. At the same time, from the development trend of the forming method of aluminum alloy, high-pressure die-cast aluminum is also more and more widely used in body structural parts, especially in new energy electric vehicles, and there are also more and more integrated large die-casting assemblies (such as the front engine compartment, the rear floor, etc.).

[0003] Typical cases of current integrated die-casting applications, such as the integrated aluminum alloy die-casting structural parts of the front engine compartment and the rear floor, compared with stamping parts, have a shorter manufacturing process and the welding process is omitted. For the integrated die-cast engine compartment and rear floor, the general design idea is that the main demolding direction is the pure Z direction in the absolute coordinate system of the vehicle body. At the same time, due to the negative angle problem on both sides of the wheelhouse, an ejector slide in the Y direction is required. Therefore, the conventional design requires the wheelhouse area to maintain a draft in the Y direction. However, considering aspects such as the sharing rate of the whole vehicle platform, the chassis assembly processability, and the chassis controllability, the pure Y-direction shock absorber installation method will bring certain limitations and sacrifices in performance, etc.

[0004] Integrated die-cast vehicle body structural parts, especially the rear floor, have been successively mass-produced and applied in the industry. Since the integrated die-cast parts are related to the installation of components in multiple fields such as the chassis, interior and exterior trims, and electrical appliances, the die-casting quality has become a key item that needs to be strictly controlled. And the process rationality of the product structure design (including draft, fillet, thickness, etc.), die-casting process, and die-casting mold have become the key factors affecting the quality of the integrated die-cast parts.

[0005] At present, the quality problems of integrated die-cast structural parts are mainly internal pores / shrinkage cavities, unqualified mechanical properties, surface blistering, dimensional out-of-tolerance caused by deformation, etc. There are installation hard points for the chassis subframe, suspension and seats in the integrated die-cast rear floor. Generally, bosses with a diameter of more than 20 mm need to be pre-cast on the vehicle body structural parts, and then threaded holes are machined. Therefore, generally, to avoid shrinkage cavities and pore problems in the casting process of the screw hole bosses at the installation hard point positions, the wall thickness of the bosses is generally guaranteed to be 4-8 mm.

[0006] To avoid the problem of thick wall at the shock absorber installation position of the chassis suspension system, the following solutions mainly exist:

[0007] Solution ①: The installation point area still ensures installation on an inclined plane (forming an angle of approximately 20 - 70 degrees with the XY plane), and the molds in the left and right wheelhouse areas are provided with sliders for ejection in the Y direction. However, there is a thick material thickness in the installation table area, posing risks of casting shrinkage cavities and gas holes. At the same time, to minimize this defect as much as possible, local extrusion pins and high-pressure point cooling need to be added in the process and mold structure, making the mold structure more complex and costly, and the defect cannot be completely solved.

[0008] Solution ②: The shock absorber is adjusted to be installed purely in the Y direction, and the molds in the left and right wheelhouse areas are provided with sliders for ejection in the Y direction. In this solution, since the bolt installation direction is basically perpendicular to the shock absorber movement direction, the bolts are constantly under the action of shear force, and the number of installation bolts needs to be increased from 2 to more than 3, increasing the part cost and assembly man-hours.

[0009] Solution ③: The shock absorber is adjusted to be installed purely in the Z direction, and the molds in the left and right wheelhouse areas are provided with sliders for ejection in the Y direction. This solution mainly has the risks of inconvenient bolt input for final assembly and insufficient installation space, and the drawback of constantly needing to adjust and modify the designs of components such as wheel arches. Utility Model Content

[0010] The present utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the present utility model provides a die-casting mold assembly, and the die-casting mold assembly can improve the quality of die-cast products and reduce the production difficulty.

[0011] The present utility model also provides a rear floor assembly.

[0012] The present utility model also provides a vehicle.

[0013] The die-casting mold assembly according to the first aspect of the present utility model includes: a first mold body; a second mold body, the first mold body and the second mold body cooperate in the Z direction to define a cavity; a slider assembly, the slider assembly is provided at both ends of the cavity, the slider assembly includes a main slider and a sub-slider, and the sub-slider is movably provided in the main slider in the Y direction along a direction away from the cavity.

[0014] With the die-casting mold assembly according to the present utility model, by providing the main slider and the sub-slider, the production difficulty of the rear floor assembly is reduced, the situation of casting defects in the rear floor body is avoided, the quality of die-cast products is improved, the material thickness of the assembly area of the rear floor assembly is ensured to be consistent, thereby ensuring the product quality of the rear floor assembly, optimizing the weight distribution of the vehicle, ensuring the structural strength of important installation points of the white body, and the structural design of the die-casting mold assembly is ingenious.

[0015] In some embodiments, a first guiding portion is formed in the main slider. The first guiding portion extends obliquely downward in a direction away from the cavity in the Y direction. The secondary slider is formed with a second guiding portion, and the second guiding portion is slidably engaged with the first guiding portion.

[0016] In some embodiments, the first guiding portion is formed as a guide rail, and the second guiding portion is formed as a slider. The guide rail and the slider cooperate with each other to enable the secondary slider to move obliquely in the Y direction.

[0017] In some embodiments, the die-casting mold assembly further includes: a pressing plate disposed on the upper portion of the secondary slider for fixing the secondary slider.

[0018] In some embodiments, a protruding portion is formed on one side of the secondary slider facing the cavity. The protruding portion extends obliquely upward in the Y direction in a direction towards the cavity and extends into the cavity.

[0019] The rear floor assembly according to the second aspect of the present invention includes: a rear floor body which is die-cast by the die-casting mold assembly according to the embodiments of the first aspect of the present invention; a shock absorber connected to the rear floor body.

[0020] The rear floor assembly according to the present invention is die-cast by the die-casting mold assembly, which reduces the production difficulty of the rear floor assembly, avoids the occurrence of casting defects in the rear floor body, ensures the uniform thickness of the material in the assembly area of the rear floor assembly, thereby ensuring the product quality of the rear floor assembly, optimizing the weight distribution of the vehicle, and ensuring the structural strength of the important mounting points of the white body.

[0021] In some embodiments, the shock absorber is connected to the rear floor body through a mounting bracket.

[0022] In some embodiments, the rear floor body has a wheelhouse, and an installation boss is formed inside the wheelhouse. The installation boss extends linearly in the Y direction in a direction away from the wheelhouse.

[0023] In some embodiments, an installation hole is formed in the installation boss, and the installation hole is adapted for a fastener to penetrate. The mounting bracket is connected to the installation boss through the fastener.

[0024] The vehicle according to the third aspect of the present invention includes the rear floor assembly according to the second aspect of the present invention as described above.

[0025] The vehicle according to the present invention improves the overall performance of the vehicle and reduces the production difficulty of the vehicle by providing the rear floor assembly according to the second aspect as described above.

[0026] Additional aspects and advantages of the present utility model will be given in part in the following description, become apparent in part from the following description, or be learned through the practice of the present utility model. Brief Description of the Drawings

[0027] Figure 1 is a schematic diagram of a die-casting mold assembly according to an embodiment of the present utility model;

[0028] Figure 2 is Figure 1 a schematic diagram of the die-casting mold assembly shown in

[0029] Figure 3 is Figure 2 a cross-sectional schematic diagram of the die-casting mold assembly shown in

[0030] Figure 4 is Figure 1 an exploded schematic diagram of the slider assembly shown in

[0031] Figure 5 is Figure 1 a schematic diagram of the rear floor body shown in

[0032] Figure 6 is a schematic diagram of a rear floor assembly according to an embodiment of the present utility model;

[0033] Figure 7 is Figure 6 a partially enlarged schematic diagram at location A of the rear floor assembly shown in

[0034] Figure 8 is Figure 6 a schematic diagram of another perspective of the rear floor assembly shown in

[0035] Figure 9 is Figure 8 a schematic diagram of the B-B cross-section of the rear floor assembly shown in

[0036] Figure 10 is Figure 9 a partially enlarged schematic diagram of the rear floor assembly shown in

[0037] Reference Numerals:

[0038] 100, die-casting mold assembly; 1, first mold body; 2, second mold body; 3, slider assembly; 31, main slider; 32, sub-slider; 4, pressure plate; 200, rear floor assembly; 201, rear floor body; 2011, wheel housing; 2012, mounting boss; 20121, mounting hole; 202, shock absorber; 203, mounting bracket; 300, fastener. Detailed Description of the Embodiments

[0039] Embodiments of the present utility model will be described in detail below. Examples of the embodiments are shown in the accompanying drawings, where the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions throughout. The embodiments described below by referring to the accompanying drawings are exemplary and are intended to explain the present utility model, and should not be construed as a limitation of the present utility model.

[0040] First, refer to Figures 6 - 10 A brief description will be given to the rear floor assembly 200 according to the embodiment of the second aspect of the present utility model.

[0041] The rear floor assembly 200 according to the embodiment of the present utility model includes: a rear floor body 201 and a shock absorber 202.

[0042] As Figure 6 shown, the rear floor body 201 is die-cast by the die-casting mold assembly 100 of the first aspect embodiment of the present utility model, and the shock absorber 202 is connected to the rear floor body 201.

[0043] The rear floor assembly 200 according to the embodiment of the present utility model is die-cast by the die-casting mold assembly 100, which reduces the production difficulty of the rear floor assembly 200, avoids the situation of casting defects of the rear floor body 201, ensures the consistent wall thickness of the assembly area of the rear floor assembly 200, thereby ensuring the product quality of the rear floor assembly 200, optimizing the vehicle weight distribution, and ensuring the structural strength of the important installation points of the white body.

[0044] As shown in the figure, the shock absorber 202 is connected to the rear floor body 201 through a mounting bracket 203, which has the function of transmitting and dispersing vibrations and forces from the road surface, ensuring the stability and riding comfort of the vehicle.

[0045] In some embodiments of the present utility model, the rear floor body 201 has a wheelhouse 2011, and an installation boss 2012 is formed inside the wheelhouse 2011. The installation boss 2012 extends linearly in the Y direction along the direction away from the wheelhouse 2011. As Figure 9 shown, the demolding direction of the shock absorber installation boss area is the normal direction of the top surface of the installation boss 2012, realizing the inclined installation of the shock absorber 202. At the same time, the wall thickness around the installation boss can be made consistent, avoiding the casting defect problem caused by excessive wall thickness due to the single Y-direction slider die-casting. In addition, compared with the pure Y-direction shock absorber installation point scheme, the problem of increasing fasteners required for Y-direction slider die-casting is reduced, thereby reducing the production cost.

[0046] Specifically, an installation hole 20121 is formed in the installation boss 2012. The installation hole 20121 is adapted for a fastener to pass through, and the installation bracket 203 is connected to the installation boss 2012 through the fastener. Thus, the installation bracket 203 can be firmly fixed on the rear floor body 201, providing a reliable installation basis for the shock absorber 202 and other suspension system components, and ensuring the handling performance and riding comfort of the vehicle under different driving conditions.

[0047] Reference is made below Figures 1 - 10 to describe a die-casting mold assembly 100 according to an embodiment of the first aspect of the present invention.

[0048] As Figure 1 shown, the die-casting mold assembly 100 according to an embodiment of the first aspect of the present invention includes: a first mold body 1, a second mold body 2, and a slider assembly 3.

[0049] Specifically, the first mold body 1 and the second mold body 2 define a cavity. The slider assembly 3 is disposed at both ends of the cavity. The slider assembly 3 includes a main slider 31 and a sub-slider 32. The sub-slider 32 is movably disposed in the main slider 31 in a direction away from the cavity in the Y direction. As Figure 1 shown, the first mold body 1 is a fixed mold, and the second mold body 2 is a movable mold. After the first mold body 1, the second mold body 2 and the slider assembly 3 are closed, molten metal is injected into the cavity and forms the rear floor body 201 after cooling.

[0050] According to the die-casting mold assembly 100 of the embodiment of the present invention, by providing the main slider 31 and the sub-slider 32, the production difficulty of the rear floor assembly 200 is reduced, the situation of casting defects of the rear floor body 201 is avoided, the quality of the die-cast product is improved, the material thickness of the assembly area of the rear floor assembly 200 is ensured to be consistent, thereby ensuring the product quality of the rear floor assembly 200, optimizing the weight distribution of the vehicle, ensuring the structural strength of the important installation points of the white body, and the structural design of the die-casting mold assembly 100 is ingenious.

[0051] The working sequence of die-casting the rear floor body 201 is as follows: the first mold body 1 and the second mold body 2 are closed → the main slider 31 is pushed in → the sub-slider 32 is pushed in → die-casting production → the sub-slider 32 is withdrawn → the main slider 31 is withdrawn → the first mold body 1 and the second mold body 2 are opened → the ejector pin ejects the rear floor body 201 → the manipulator grabs the rear floor body 201.

[0052] In some embodiments of the present utility model, a first guiding portion is formed inside the main slider 31. The first guiding portion extends obliquely downward in a direction away from the cavity in the Y direction. The secondary slider 32 is formed with a second guiding portion, and the second guiding portion cooperates with the first guiding portion for sliding. It can be understood that the secondary slider 32 moves obliquely in the Y direction, that is, the secondary slider 32 does not move along the Y direction. Thereby, the space is effectively utilized, making the die structure compact, and avoiding the casting defect problem caused by the over-thick material thickness in the case of a single Y-direction slider die casting.

[0053] In some embodiments of the present utility model, the first guiding portion is formed as a guide rail 311, and the second guiding portion is formed as a slider. The guide rail and the slider cooperate with each other to enable the secondary slider 32 to move obliquely in the Y direction. It can be understood that the inclined guide rail allows the secondary slider 32 to be fixedly connected to the main slider 31 at a specific angle when the die is closed, and to withdraw in the opposite direction when the die is opened. Thereby, the structure of the slider assembly 3 is simple, ingeniously designed, and convenient for production.

[0054] In some embodiments of the present utility model, the die-casting mold assembly 100 further includes: a pressing plate 4. The pressing plate 4 is disposed on the upper part of the secondary slider 32 for fixing the secondary slider 32. Thereby, the stability of the secondary slider 32 during die closing and die casting is ensured, and the lateral force generated during die casting is prevented from causing the secondary slider 32 to move or deform.

[0055] In some embodiments of the present utility model, a convex portion is formed on the side of the secondary slider 32 facing the cavity. The convex portion extends obliquely upward in a direction toward the cavity in the Y direction and extends into the cavity. The rear floor body 201 has a wheel housing 2011, and an installation boss 2012 is formed inside the wheel housing 2011. The installation boss 2012 extends linearly in the Y direction in a direction away from the wheel housing 2011. It can be understood that the convex portion is used to form the installation boss 2012, thus realizing the method of installing the shock absorber 202 on an inclined surface, avoiding the casting defect problem caused by the over-thick material thickness in a single pure Y-direction slider process solution, and at the same time solving the problem of the need to increase installation bolts caused by the pure Y-direction slider, resulting in cost increase and reducing the production cost.

[0056] The rear floor assembly 200 according to the second aspect embodiment of the present utility model includes: a rear floor body 201 and a shock absorber 202. The rear floor body 201 is die-cast by the die-casting mold assembly 100 according to the first aspect embodiment of the present utility model, and the shock absorber 202 is connected to the rear floor body 201.

[0057] The rear floor assembly 200 according to the embodiments of the present utility model is die-cast by the die-casting mold assembly 100, which reduces the production difficulty of the rear floor assembly 200, avoids the occurrence of casting defects in the rear floor body 201, ensures the consistent wall thickness of the assembly area of the rear floor assembly 200, thereby ensuring the product quality of the rear floor assembly 200, optimizing the vehicle's weight distribution, and ensuring the structural strength of the important mounting points of the white body.

[0058] Furthermore, the shock absorber 202 is connected to the rear floor body 201 through the mounting bracket 203, which has the function of transmitting and dispersing the vibrations and forces from the road surface, ensuring the stability and riding comfort of the vehicle.

[0059] In some embodiments of the present utility model, the rear floor body 201 has a wheel housing 2011, and an installation boss 2012 is formed inside the wheel housing 2011. The installation boss 2012 extends linearly in the Y direction along the direction away from the wheel housing 2011. As Figure 9 shown, the demolding direction of the shock absorber installation boss area is the normal direction of the top surface of the installation boss 2012, realizing the inclined installation of the shock absorber 202. At the same time, the wall thickness around the installation boss can be made consistent, avoiding the casting defect problem caused by excessive wall thickness in the case of single Y-direction slider die-casting. In addition, compared with the scheme of a pure Y-direction shock absorber mounting point, the problem of increasing fasteners required for Y-direction slider die-casting is reduced, thereby reducing the production cost.

[0060] Specifically, a threaded installation hole 20121 is formed inside the installation boss 2012. The installation hole 20121 is suitable for the penetration of fasteners, and the mounting bracket 203 is connected to the installation boss 2012 through fasteners. Thus, the mounting bracket 203 can be firmly fixed on the rear floor body 201, providing a reliable mounting basis for the shock absorber 202 and other suspension system components, ensuring the handling performance and riding comfort of the vehicle under different driving conditions.

[0061] The vehicle according to the third aspect embodiments of the present utility model includes the rear floor assembly 200 according to the second aspect embodiments of the present utility model as described above.

[0062] The vehicle according to the embodiments of the present utility model improves the overall performance of the vehicle and reduces the production difficulty of the vehicle by providing the rear floor assembly 200 according to the second aspect embodiments as described above.

[0063] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model.

[0064] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, "a plurality of" means two or more, unless otherwise specifically defined.

[0065] In the present utility model, unless otherwise clearly defined and limited, the terms "installed", "connected", "connected to", "fixed", etc. shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection, an electrical connection, or a communication connection; it may be directly connected, or indirectly connected through an intermediate medium, and it may be the internal communication of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0066] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples" 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 utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0067] Although the embodiments of the present utility model have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and purposes of the present utility model. The scope of the present utility model is defined by the claims and their equivalents.

Claims

1. A die-casting mold assembly, characterized in that, Comprising: A first motif; A second motif, the first motif and the second motif cooperate in the Z direction to define a cavity; A slider assembly, the slider assembly is disposed at both ends of the cavity, the slider assembly includes a main slider and a sub-slider, and the sub-slider is movably disposed in the main slider in a direction away from the cavity in the Y direction.

2. The die-casting mold assembly according to claim 1, characterized in that, A first guiding portion is formed in the main slider, the first guiding portion extends obliquely downward in a direction away from the cavity in the Y direction, the sub-slider is formed with a second guiding portion, and the second guiding portion cooperates with the first guiding portion to slide.

3. The die-casting mold assembly according to claim 2, wherein, The first guiding portion is formed as a guide rail, the second guiding portion is formed as a slider, and the guide rail and the slider cooperate with each other to enable the sub-slider to move obliquely in the Y direction.

4. The die-casting mold assembly according to claim 3, characterized in that, Further comprising: A pressing plate, the pressing plate is disposed on the upper part of the sub-slider for fixing the sub-slider.

5. The die-casting mold assembly according to any one of claims 1-4, characterized in that, A convex portion is formed on one side of the sub-slider facing the cavity, the convex portion extends obliquely upward in a direction facing the cavity in the Y direction and extends into the cavity.

6. A rear floor assembly, characterized in that, Comprising: A rear floor body, the rear floor body is die-cast by the die-casting mold assembly according to any one of claims 1-5; A shock absorber, the shock absorber is connected to the rear floor body.

7. The rear floor assembly according to claim 6, wherein The shock absorber and the rear floor body are connected through a mounting bracket.

8. The rear floor assembly according to claim 7, characterized in that, The rear floor body has a wheelhouse, and a mounting boss is formed inside the wheelhouse, and the mounting boss extends linearly in a direction away from the wheelhouse in the Y direction.

9. The rear floor assembly according to claim 8, wherein A mounting hole is formed in the mounting boss, the mounting hole is adapted for a fastener to pass through, and the mounting bracket is connected to the mounting boss through the fastener.

10. A vehicle, characterized in that, Comprising the rear floor assembly according to any one of claims 6-9.

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