Motor suspension mounting frame and electric automobile auxiliary frame

Abstract

The utility model discloses a motor suspension mounting frame and an electric vehicle auxiliary frame. The motor suspension mounting frame comprises a connecting plate, two mounting plates and at least one first concave rib, one ends of the two mounting plates are connected through a connecting plate, the connecting position of each mounting plate and the connecting plate is rounded to form a rounded corner part, a placing space used for containing a motor suspension is formed between the two mounting plates and the connecting plate, and the two mounting plates are used for mounting the motor suspension. At least one of the two mounting plates and the connecting plate is used for connecting an auxiliary frame; the motor suspension mounting frame is formed by stamping a plate, and at least one first concave rib is arranged on at least one fillet part. According to the motor suspension mounting frame, springback generated after stamping manufacturing is completed can be weakened through the first concave ribs, the opening size and parallelism between the two mounting plates are relatively guaranteed, the machining precision is improved, the reliability of motor suspension mounting is improved, side shaping is not needed after stamping is completed, and the production efficiency can be improved.

Description

Technical Field

[0001] The present application relates to the technical field of motor suspension installation, and in particular to a motor suspension mounting frame and an electric vehicle subframe. Background Art

[0002] Electric vehicles usually connect the axle and suspension to the "main frame" through a subframe, and install the engine or motor on the subframe to use the subframe to block the vibration and noise transmitted from the engine or motor and the road surface, reducing their entry into the car. Among them, the motor is generally suspended on the suspension mounting frame of the subframe.

[0003] In the related art, the motor suspension mounting bracket can be U-shaped and is formed by stamping a plate. When the plate used to manufacture the U-shaped motor suspension mounting bracket undergoes plastic bending deformation during the stamping process, it is accompanied by elastic deformation. When the stamping load is removed, the elastic deformation is partially restored. This phenomenon is called stamping rebound. Stamping rebound will cause the shape and size of the motor suspension mounting bracket, for example, the opening size and parallelism between the two mounting surfaces, to be inconsistent with the shape and size corresponding to the stamping die. It is difficult to ensure the processing accuracy of the motor suspension mounting bracket, resulting in low reliability of motor installation. In recent years, the motor power of electric vehicles has become increasingly larger, and the weight of motors has become increasingly heavier. In order to meet the strength requirements of motor installation, the strength of the materials used to manufacture motor suspension mounting brackets has also become increasingly higher, making the above-mentioned stamping rebound phenomenon more serious.

[0004] In order to ensure the opening size and parallelism between the two mounting surfaces of the above-mentioned U-shaped motor suspension mounting frame, it is necessary to add a side shaping process in the stamping production process. For example, the production process of "blanking and punching-forming-flanging-side shaping-trimming and side punching" is adopted. This will increase the production processes and easily reduce production efficiency.

[0005] Therefore, how to provide a solution to overcome or alleviate the above-mentioned defects is still a technical problem that needs to be solved urgently by those skilled in the art. Utility Model Content

[0006] The purpose of the present application is to provide a motor suspension mounting bracket to reduce the springback generated after stamping manufacturing, and to improve processing accuracy and production efficiency. Another purpose of the present application is to provide an electric vehicle subframe.

[0007] In order to solve the above technical problems, the present application provides a motor suspension mounting bracket, comprising: a connecting plate, two mounting plates and at least one first concave rib;

[0008] One ends of the two mounting plates are connected by the connecting plate, the connection position of each mounting plate and the connecting plate is rounded to form a rounded corner, a placement space for accommodating the motor suspension is formed between the two mounting plates and the connecting plate, the two mounting plates are used to install the motor suspension, and at least one of the two mounting plates and the connecting plate is used to connect the sub-frame;

[0009] The motor suspension mounting frame is formed by stamping a plate, and at least one of the rounded corners is provided with at least one of the first concave ribs.

[0010] Optionally, each of the first concave ribs extends from the corresponding mounting plate through the corresponding rounded corner portion to the connecting plate.

[0011] Optionally, at least one of the rounded corners is provided with two or more of the first concave ribs, and the two or more of the first concave ribs are distributed along the length direction of the corresponding rounded corner.

[0012] Optionally, both of the two rounded corners are provided with the first concave ribs, and the first concave ribs corresponding to the two rounded corners are symmetrically arranged with respect to a longitudinal section through the center of the connecting plate.

[0013] Optionally, the connecting plate extends to one side to form a protruding portion, the protruding portion is recessed from outside to inside to form a second concave rib, and the inner surface of the protruding portion facing the second concave rib forms a first mounting surface, and the first mounting surface is used to connect the subframe.

[0014] Optionally, the other side of the connecting plate and the same side of the mounting plate are both provided with outward flanges.

[0015] Optionally, the other end of the mounting plate is provided with an outwardly facing flange, the flange extends outwardly to form a mounting foot, the mounting foot has a second mounting surface, and the two second mounting surfaces are used to connect the sub-frame.

[0016] Optionally, each of the mounting plates is provided with a mounting hole and a positioning hole, two of the mounting holes are used for mounting the motor suspension, and two of the positioning holes are used for positioning the plate during stamping.

[0017] The present application also provides an electric vehicle subframe, comprising a beam body and the motor suspension mounting frame;

[0018] At least one of the two mounting plates and the connecting plate is connected to the beam body.

[0019] The motor suspension mounting frame provided in the present application is provided with a connecting plate, two mounting plates and at least one first concave rib, the two mounting plates are connected by the connecting plate, a rounded corner is formed at the connection position between each mounting plate and the connecting plate, and a placement space for accommodating the motor suspension is formed between the two mounting plates and the connecting plate. The two mounting plates are used to install the motor suspension and to connect the subframe. The motor suspension mounting frame is formed by stamping a plate, and at least one rounded corner is provided with at least one first concave rib.

[0020] When in use, the first concave rib can be used to reduce the springback generated after the stamping of the motor suspension mounting frame, relatively guarantee the opening size and parallelism between the two mounting plates, so as to improve the processing accuracy of the motor suspension mounting frame and increase the reliability of the motor suspension installation. Moreover, no additional side shaping is required after the stamping, which can improve production efficiency. In addition, accordingly, no additional side shaping mold is required, which can relatively reduce the mold cost and help reduce production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the structure of the motor suspension mounting frame of the embodiment provided in this application;

[0022] Figure 2 for Figure 1 Right view of;

[0023] Figure 3 for Figure 2 AA section view;

[0024] Figure 4 This is a schematic diagram of the partial structure of the electric vehicle subframe of the embodiment provided in this application.

[0025] The reference numerals in the above drawings are described as follows:

[0026] 1-connecting plate, 1a-extending portion;

[0027] 2-mounting plate, 2a-mounting hole, 2b-positioning hole;

[0028] 3- first concave rib;

[0029] 4-Rounded corners;

[0030] 5- second concave rib;

[0031] 6-Flanging;

[0032] 7-Installation feet;

[0033] 8-Motor suspension;

[0034] 9- beam body;

[0035] a-storage space, b-first mounting surface, c-second mounting surface, d-third mounting surface. DETAILED DESCRIPTION

[0036] In order to enable those skilled in the art to better understand the present application, the present application is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0037] It should be noted that the terms "upper", "lower", "left", "right", "front", "back" and so on in this application are all based on the Figure 1 For perspective, please refer to Figures 1 to 4 It is understood that the motor suspension mounting bracket of the present application has different orientations according to different installation locations when used, and the above orientation terms are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore, cannot be understood as a limitation on the present application.

[0038] The “inside” and “outside” mentioned in this application refer to positions relative to the placement space a. The position inside the placement space a is “inside”, and the position outside the placement space a is “outside”.

[0039] The terms "first", "second", etc. mentioned in this application are only used to facilitate the description of two or more structures or components with the same or similar structures and / or functions, and do not imply any special limitation on the order and / or importance.

[0040] In this application, unless otherwise clearly specified and limited, the term "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0041] Please refer to Figure 1 , Figure 1 This is a schematic diagram of the structure of the motor suspension mounting frame of the embodiment provided in the present application.

[0042] In the embodiment provided in the present application, the motor suspension mounting frame includes a connecting plate 1, two mounting plates 2 and at least one first concave rib 3. One end of the two mounting plates 2 is connected by the connecting plate 1, corresponding to Figure 1In the figure, a connecting plate 1 is arranged at the upper end of two mounting plates 2 to form a U-shaped motor suspension mounting frame. The connection position of each mounting plate 2 and the connecting plate 1 is rounded to form a fillet portion 4. The provision of the fillet portion 4 can increase the structural strength of the motor suspension mounting frame and make it less prone to cracking. A placement space a for accommodating the motor suspension 8 is formed between the two mounting plates 2 and the connecting plate 1. The two mounting plates 2 are used to install the motor suspension 8. At least one of the two mounting plates 2 and the connecting plate 1 is used to connect to a sub-frame (not shown in the figure), so that the motor suspension can be installed on the sub-frame. The motor suspension mounting frame is formed by stamping a plate, and at least one fillet portion 4 is provided with at least one first concave rib 3.

[0043] It can be understood that the opposite sides of the two mounting plates 2 form a third mounting surface d, and the distance and parallelism between the two third mounting surfaces d are important factors to ensure the installation accuracy and reliability of the motor suspension 8. When the first concave rib 3 is not provided, the plate can be plastically deformed by stamping the plate to obtain the required shape and size, and the plastic deformation will be accompanied by elastic deformation. After the stamping is completed, the applied external stamping load is removed, and after the molded part is taken out of the stamping die, the shape and size of the molded part will change in the opposite direction of the deformation when the stamping load is applied, so that the geometric accuracy of the molded part is impaired. For example, the two mounting plates 2 will rebound outward, so that the distance and parallelism between the two third mounting surfaces d deviate from the distance and parallelism corresponding to the stamping die, making it difficult to ensure the installation accuracy and reliability of the motor suspension 8.

[0044] The motor suspension mounting frame provided in the embodiment of the present application is provided with a first concave rib 3 at the fillet 4 connecting the mounting plate 2 and the connecting plate 1. The first concave rib 3 can be used to offset at least part of the rebound force of the two mounting plates 2 at the position of the fillet 4, reduce the recovery degree of the elastic deformation part, thereby weakening the rebound, relatively guaranteeing the distance and parallelism between the two third mounting surfaces d, and improving the processing accuracy of the entire motor suspension mounting frame. At the same time, the first concave rib 3 can also form a reinforcing rib to improve the strength and structural stability of the motor suspension mounting frame, thereby increasing the accuracy and reliability of the motor suspension 8 installation. In addition, since the first concave rib 3 is a structure provided by the motor suspension mounting frame itself, it is only necessary to provide a corresponding structure at the corresponding position in the concave die and the convex die of the stamping die, and stamp out the first concave rib 3 during the stamping process. After the stamping is completed, there is no need to perform side shaping. Compared with the method of using the side shaping process to alleviate the rebound problem in the prior art, the production process can be simplified to improve the production efficiency of the motor suspension mounting frame. Accordingly, no additional side shaping mold is required, which can relatively reduce the mold cost and reduce the production cost of the motor suspension mounting frame.

[0045] It is not difficult to understand that the concave rib is a concave part processed on the surface of the structure. The first concave rib 3 can be arranged on the outer surface of the motor suspension mounting frame, and is concave from the outer surface to the inner surface. After stamping, the outer surface will be concave and the inner surface will be convex accordingly.

[0046] Please combine Figure 1 It is understood that in the embodiment provided in the present application, each first concave rib 3 can extend from the corresponding mounting plate 2 to the connecting plate 1 through the corresponding fillet portion 4. In this way, the effect of the first concave rib 3 in reducing the rebound is improved, and the processing accuracy of the motor suspension mounting frame can be further guaranteed.

[0047] It is worth noting that the shape of the first concave rib 3 is not limited. Figure 1 The cylindrical surface shown may be similar to a surface formed by a cylinder intersecting the connecting plate 1, the mounting plate 2 and the fillet 4, or may be V-shaped, similar to a surface formed by a triangular prism intersecting the connecting plate 1, the mounting plate 2 and the fillet 4.

[0048] In actual configuration, the number of the first concave ribs 3 provided on each fillet portion 4 is not limited, and can be as follows: Figure 1 As shown, one first concave rib 3 is provided on the rounded corner portion 4, or more than two first concave ribs 3 can be provided on the rounded corner portion 4, and the two or more first concave ribs 3 can be distributed along the length direction of the corresponding rounded corner portion 4. When more than three first concave ribs 3 are provided on the rounded corner portion 4, the three or more first concave ribs 3 can be evenly spaced along the length direction of the corresponding rounded corner portion 4, so that the first concave ribs 3 can reduce the rebound more evenly, thereby improving the effect of reducing the rebound. Among them, the length direction of the rounded corner portion 4 is Figure 1 The front-to-back direction.

[0049] Of course, the number of the rounded corners 4 where the first concave rib 3 is provided is not limited. For example, the first concave rib 3 may be provided in only one rounded corner 4, or Figure 1 As shown, first concave ribs 3 are provided on both rounded corners 4. Obviously, the effect of providing first concave ribs 3 on both rounded corners 4 is better. In this case, the first concave ribs 3 corresponding to the two rounded corners 4 can be symmetrically arranged about the through-center longitudinal section of the connecting plate 1, so that the first concave ribs 3 have a more uniform weakening effect on the rebound, and the weakening effect is better, further ensuring the processing accuracy of the motor suspension mounting frame. Among them, the through-center longitudinal section of the connecting plate 1 is the through-center vertical section of the connecting plate 1.

[0050] Please refer to Figure 2 and Figure 3 , Figure 2 for Figure 1 Right view of Figure 3 for Figure 2 AA section view.

[0051] In the embodiments provided in this application, please combine Figure 1 and Figure 3 Understand that the connecting plate 1 to one side, that is Figure 1 The rear side of the extension portion 1a is extended to form a projection portion 1a, which is recessed from outside to inside, that is, recessed from top to bottom, to form a second concave rib 5. The inner surface of the extension portion 1a facing the second concave rib 5 forms a first mounting surface b, which is used to connect the subframe.

[0052] It is not difficult to understand that a structure corresponding to the second rib 5 can be set on the stamping die to stamp out the second rib 5. In this way, the second rib 5 appears as a concave structure on the upper surface of the connecting plate 1, and the lower surface of the connecting plate 1 bulges downward, and the lower surface of the bulging part forms the above-mentioned first mounting surface b.

[0053] When in use, the first mounting surface b can increase the connection area between the connecting plate 1 and the sub-frame. For example, the first mounting surface b and the sub-frame can be welded. Since the first mounting surface b can increase the weld, the connection strength can be increased, thereby improving the reliability of the installation of the motor suspension 8.

[0054] In addition, the second concave rib 5 can also increase the strength of the motor suspension mounting frame, and further improve the reliability of the installation of the motor suspension 8.

[0055] like Figure 1 and Figure 2 As shown, in the embodiment of the present application, the other side of the connecting plate 1 and the same side of the mounting plate 2, that is, the front sides of both, are provided with outward flanges 6.

[0056] In the embodiments provided in this application, please combine Figures 1 to 3 It is understood that the other end of the mounting plate 2, i.e., the lower end, is provided with an outwardly facing flange 6, which extends outward to form a mounting foot 7, and the mounting foot 7 has a second mounting surface c. Figure 1 Specifically, it is the upper surface of the mounting foot 7, and the two second mounting surfaces c are used to connect the sub-frame.

[0057] When in use, the second mounting surface c can increase the connection area between the mounting plate 2 and the sub-frame. For example, the second mounting surface c and the sub-frame can be welded. Since the second mounting surface c can increase the weld, the connection strength can be increased, thereby improving the reliability of the motor suspension 8 installation.

[0058] In addition, the provision of the flange 6 can also improve the rigidity and stability of the entire motor suspension mounting frame, making it less prone to cracking or wrinkling.

[0059] In the embodiment provided in the present application, each mounting plate 2 is provided with a mounting hole 2a and a positioning hole 2b. The two mounting holes 2a are used for installing the motor suspension 8, and the two positioning holes 2b are used for positioning during plate stamping to improve the processing accuracy of the motor suspension mounting frame.

[0060] In actual setting, the material of the motor suspension mounting frame is not limited. In the embodiment provided in this application, the motor suspension mounting frame can be stamped from high-strength steel plate QStE 420 TM, with a minimum yield strength of 420 MPa, and can carry heavy and powerful motors.

[0061] During specific use, the motor suspension 8 can be arranged in the placement space a between the two third mounting surfaces d, and after the bolts are passed through the two mounting holes 2a and the motor suspension 8, nuts are used for tightening. In order to ensure the reliability of the installation of the motor suspension 8 on the motor suspension mounting frame and reduce the attenuation of the tightening torque of the nut, the distance between the two third mounting surfaces d, that is, the tolerance and parallelism of the opening size are designed within a certain range in this embodiment. The above-mentioned high-strength steel plate QStE 420 TM is prone to rebound due to its high strength, and the first concave rib 3 provided on the motor suspension mounting frame provided in the above embodiment of the present application can weaken the rebound, and can relatively ensure the opening size and parallelism requirements of the two third mounting surfaces d without adding a side shaping process, so as to ensure the reliability of the installation of the motor suspension 8 on the motor suspension mounting frame.

[0062] According to actual calculations, compared with the motor suspension mounting frame without the first concave rib 3, which needs to be side-shaped after stamping, the motor suspension mounting frame provided by the embodiment of the present application can reduce the side shaping process due to the first concave rib 3 provided to reduce the rebound generated after stamping unloading, thereby increasing the production cycle by more than 20% and reducing the mold investment cost by more than 20%. It can be seen that the motor suspension mounting frame provided by the embodiment of the present application can improve production efficiency and reduce production costs to a certain extent.

[0063] Please refer to Figure 4 , Figure 4 This is a schematic diagram of the partial structure of the electric vehicle subframe of the embodiment provided in this application.

[0064] In an embodiment of the present application, an electric vehicle subframe is also provided, comprising a beam body 9 and the motor suspension mounting frame in the above embodiment; at least one of the two mounting plates 2 and the connecting plate 1 is connected to the beam body 9.

[0065] In this way, since the first concave rib 3 provided on the motor suspension mounting frame in the above embodiment can weaken the rebound generated after unloading of the stamping forming, the opening size and parallelism of the two third mounting surfaces d can be guaranteed, and the reliability of the installation of the motor suspension 8 on the motor suspension mounting frame can be relatively guaranteed, so that the electric vehicle sub-frame provided in the embodiment of the present application can relatively guarantee the reliability of the motor installation.

[0066] When used specifically, the beam body 9 can be arranged between the first mounting surface b and the second mounting surface c, the first mounting surface b is welded to one mounting surface of the beam body 9, and the two second mounting surfaces c are welded to the other mounting surface of the beam body 9. Different motors in the car have different mounting positions on the subframe, and the position of the beam body 9 is also different. For example, the beam body 9 can be a front cross beam or a rear cross beam, and there is no specific limitation.

[0067] The principles and implementation methods of the present application are described in this article using specific examples. The description of the above embodiments is only used to help understand the device and its core idea of ​​the present application. It should be pointed out that for ordinary technicians in this technical field, without departing from the principles of the present application, several improvements and modifications can be made to the present application, and these improvements and modifications also fall within the scope of protection of the claims of the present application.

Claims

1. A motor suspension mounting bracket, characterized in that: include: A connecting plate (1), two mounting plates (2) and at least one first concave rib (3); One end of the two mounting plates (2) is connected via the connecting plate (1), and the connection position between each mounting plate (2) and the connecting plate (1) is rounded to form a rounded corner (4); a placement space (a) for accommodating a motor suspension (8) is formed between the two mounting plates (2) and the connecting plate (1), the two mounting plates (2) are used to install the motor suspension (8), and at least one of the two mounting plates (2) and the connecting plate (1) is used to connect to a sub-frame; The motor suspension mounting frame is formed by stamping a plate, and at least one of the rounded corners (4) is provided with at least one of the first concave ribs (3).

2. The motor suspension mounting bracket according to claim 1, characterized in that: Each of the first concave ribs (3) extends from the corresponding mounting plate (2) through the corresponding rounded corner portion (4) to the connecting plate (1).

3. The motor suspension mounting bracket according to claim 1 or 2, characterized in that: At least one of the rounded corner portions (4) is provided with two or more of the first concave ribs (3), and the two or more of the first concave ribs (3) are distributed along the length direction of the corresponding rounded corner portion (4).

4. The motor suspension mounting bracket according to claim 1 or 2, characterized in that: The two rounded corners (4) are both provided with the first concave ribs (3), and the first concave ribs (3) corresponding to the two rounded corners (4) are symmetrically arranged with respect to the central longitudinal section of the connecting plate (1).

5. The motor suspension mounting bracket according to claim 1 or 2, characterized in that: The connecting plate (1) extends to one side to form a protruding portion (1a), the protruding portion (1a) is recessed from the outside to the inside to form a second concave rib (5), and the inner surface of the protruding portion (1a) facing the second concave rib (5) forms a first mounting surface (b), and the first mounting surface (b) is used to connect the subframe.

6. The motor suspension mounting bracket according to claim 5, characterized in that: The other side of the connecting plate (1) and the same side of the mounting plate (2) are both provided with outwardly facing flanges (6).

7. The motor suspension mounting bracket according to claim 1 or 2, characterized in that: The other end of the mounting plate (2) is provided with an outwardly facing flange (6), the flange (6) extending outwardly to form a mounting foot (7), the mounting foot (7) having a second mounting surface (c), and the two second mounting surfaces (c) are used for connecting the sub-frame.

8. The motor suspension mounting bracket according to claim 1 or 2, characterized in that: Each of the mounting plates (2) is provided with a mounting hole (2a) and a positioning hole (2b), the two mounting holes (2a) being used for mounting the motor suspension (8), and the two positioning holes (2b) being used for positioning the plate during stamping.

9. An electric vehicle subframe, comprising a beam body (9), characterized in that: Also includes a motor suspension mounting bracket as claimed in any one of claims 1 to 8; At least one of the two mounting plates (2) and the connecting plate (1) is connected to the beam body (9).

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