Device for preventing a subframe of an electric vehicle with a wireless charging pad from being pushed backwards

Abstract

The present invention relates to a device for preventing a subframe of an electric vehicle having a wireless charging pad from being pushed rearward. The device includes a push bracket member, one side of which is coupled to a front end member provided in front of the subframe of the electric vehicle and extends to be disposed between the subframe and the wireless charging pad installed below the subframe. Upon a front vehicle collision, the device is capable of causing deformation of the subframe equipped with the wireless charging pad to prevent the subframe from being pushed rearward.

Description

Technical Field

[0001] The present invention relates to a device for preventing the subframe from being pushed backward in the event of a collision in a vehicle equipped with a wireless charging pad for charging electric vehicles. Background Technology

[0002] The statements in this section are provided only as background information in relation to the present invention and do not constitute prior art.

[0003] Wireless charging technology using wireless charging pads has been developed to address the long charging times, short range, and inconvenience of charging batteries, which are becoming technical problems with the increasing number of electric vehicles.

[0004] refer to Figure 1 The wireless charging pad 20 is installed in the lower part of the front power electric (PE) compartment, that is, in the subframe 10. The purpose is to position the lower end of the high-voltage battery base plate, limit the ground clearance, ensure the suitability of the wiring layout, and improve the charging convenience for users.

[0005] However, unlike other components that absorb and distribute collision energy when connected to the load path and compressed and deformed in sequence during a collision with a vehicle ahead, the wireless charging plate 20 is not included in the load path of the collision because it is independently fixed to the subframe 10. This increases the rigidity of the subframe 10 and suppresses deformation of the subframe 10 during the collision.

[0006] Therefore, the mounting bolts of the subframe 10 are prone to separating from the longitudinal beam, which increases the rearward swing of the subframe 10 and impacts the high-voltage battery, potentially damaging the high-voltage battery.

[0007] The above description is intended to aid in understanding the background of this invention and may include content previously unknown to those skilled in the art. Summary of the Invention

[0008] The present invention provides a device that can prevent a subframe from being pushed backward in the event of a collision with a vehicle ahead by causing deformation of the subframe equipped with a wireless charging pad.

[0009] Other objects and advantages of the present invention will be understood from the following description and will become apparent with reference to exemplary embodiments of the invention.

[0010] In one embodiment of the invention, a means for preventing the subframe of an electric vehicle with a wireless charging pad from being pushed backward includes a pusher bracket member, one side of which is connected to a front end member disposed in front of the subframe of the electric vehicle and extends to be disposed between the subframe and a wireless charging pad mounted below the subframe.

[0011] Additionally, one side of the pusher bracket component can be connected to the front surface of the front end component.

[0012] In one embodiment, the front bolt passing through the front mounting portion of the wireless charging pad can pass through a front bolt through-hole formed in the push bracket member to engage with the subframe.

[0013] In another form, the intermediate bolt passing through the intermediate mounting portion formed behind the front mounting portion of the wireless charging pad can pass through the intermediate bolt through hole formed in the push bracket member to engage with the subframe.

[0014] In some forms of the invention, the push-support members may be configured as a pair of push-support members arranged at positions corresponding to the two side members constituting the subframe.

[0015] In some forms of the invention, the device may further include: a plastic hinge bracket and a hinge member, the plastic hinge bracket being mounted on the rear mounting portion of the wireless charging pad and having a bracket through-hole therein; the hinge member being hinged to the upper end of the plastic hinge bracket and having a hinge through-hole therein.

[0016] Here, the hinge component can be hinged to the upper rear side of the plastic hinge bracket.

[0017] In another configuration, the rear bolts passing through the rear mounting section can pass through the bracket through-hole and hinge through-hole to engage with the subframe.

[0018] In some forms of the invention, the diameter of the hinge through hole may correspond to the threaded portion of the rear bolt, and the head of the rear bolt may be inserted into the bracket through hole.

[0019] In addition, the rubber component can be inserted between the inner surface of the bracket through hole and the head of the rear bolt.

[0020] In another embodiment of the invention, a device for preventing the subframe of an electric vehicle with a wireless charging pad from being pushed rearward includes: a pusher bracket member, a plastic hinge bracket, and a hinge member. The pusher bracket member is arranged between the subframe and the wireless charging pad mounted below the subframe, and forms a front bolt through hole therein corresponding to the front mounting portion of the wireless charging pad. The plastic hinge bracket is mounted on the rear mounting portion of the wireless charging pad and forms a bracket through hole therein. The hinge member is hinged to the upper end of the plastic hinge bracket and forms a hinge through hole therein.

[0021] In other configurations, the rear bolt passing through the rear mounting section can pass through the bracket through-hole and the hinge through-hole to engage with the subframe. The diameter of the hinge through-hole can correspond to the threaded portion of the rear bolt, and the head of the rear bolt can be inserted into the bracket through-hole.

[0022] In some embodiments of the invention, the rubber component may be inserted between the inner surface of the bracket through-hole and the head of the rear bolt.

[0023] Further applicability will become apparent from the description provided herein. It should be understood that this specification and specific examples are for illustrative purposes only and are not intended to limit the scope of the invention. Attached Figure Description

[0024] To better understand the invention, its various forms will now be described by way of example with reference to the accompanying drawings, in which:

[0025] Figure 1 This is a schematic diagram showing the installation relationship of the wireless charging pad;

[0026] Figure 2 This is a schematic diagram showing the application of a device of one form of the present invention for preventing the subframe from being pushed backward in a vehicle.

[0027] Figure 3 It shows Figure 2 A schematic diagram of the shape of a portion of the side surface;

[0028] Figure 4A , Figure 4B and Figure 4C This is a schematic diagram showing the operational state of a portion of a device for preventing the subframe from being pushed backward, according to one form of the present invention;

[0029] Figure 5 This is a schematic diagram showing the shape of the side surface of the vehicle before a collision. Figure 6 This is a schematic diagram showing the shape of the lower surface of the vehicle before a collision;

[0030] Figure 7 This is a schematic diagram showing the shape of the side surface of a vehicle after a collision. Figure 8 This is a schematic diagram showing the shape of the lower surface of the vehicle after a collision;

[0031] Figure 9A This is a schematic diagram showing the state of one form of the device of the present invention for preventing the subframe from being pushed backward after a vehicle collision;

[0032] Figure 9B yes Figure 9A Enlarged view of the logo section.

[0033] The accompanying drawings described herein are for illustrative purposes only and are not intended to limit the scope of the invention in any way. Detailed Implementation

[0034] The following description is merely exemplary in nature and is not intended to limit the invention, application, or use. It should be understood that in all the drawings, corresponding reference numerals denote the same or corresponding parts and features.

[0035] The invention, its operational advantages, and the objectives achieved by practicing the invention will be fully understood by referring to the accompanying drawings, which show exemplary forms of the invention and the description therein.

[0036] In describing exemplary forms of the invention, known techniques or repetitive descriptions may be omitted or reduced to avoid obscuring the understanding of the invention by those skilled in the art.

[0037] Figure 2 The illustration shows the application of one form of the invention, a device for preventing the subframe from being pushed rearward, to a vehicle. Figure 3 It shows Figure 2 The shape of a portion of the side surface, Figure 4A , Figure 4B and Figure 4C The diagram shows a portion of a device according to one form of the invention for preventing the subframe from being pushed backward, in operation.

[0038] In the following text, reference will be made to Figures 2 to 4C A device for preventing the subframe of an electric vehicle equipped with a wireless charging pad from being pushed backward is described.

[0039] This invention is applied to electric vehicles, wherein a wireless charging pad is installed in the subframe to suppress or prevent the impact from being applied to the high-voltage battery due to the subframe's inability to deform during a collision with a vehicle in front.

[0040] The bumper is mounted on the front side of the vehicle to protect the vehicle and passengers from frontal collisions. A collision energy absorption box 31 is installed to support the rear side of the rear beam that forms the bumper. The impact is transmitted to the front end member 32 installed behind the collision energy absorption box 31.

[0041] The subframe 10 is located behind the front member 32, supporting the engine and transmission at the lower part of the vehicle body and ensuring the structural rigidity of the vehicle to facilitate load transfer. The subframe 10 is made of a generally rectangular frame that includes a front member, a rear member, and longitudinal beams formed on both sides of each of the front and rear members.

[0042] A wireless charging pad 20 for charging the high-voltage battery is installed below the subframe 10.

[0043] In order to install the wireless charging pad 20, the front mounting part 21, the middle mounting part 22 and the rear mounting part 23 are formed sequentially from the front side in the wireless charging pad 20, and the front bolt 41, the middle bolt 42 and the rear bolt 43 pass through the front mounting part 21, the middle mounting part 22 and the rear mounting part 23 to connect to the lower part of the subframe 10.

[0044] Each of the front mounting section 21, the middle mounting section 22, and the rear mounting section 23 is formed in pairs to correspond to the two longitudinal beams of the subframe 10.

[0045] Specifically, the rear mounting bracket 11 is formed at a position corresponding to the rear mounting portion 23 of the wireless charging plate 20 of the subframe 10, and the rear bolt 43 passes through the bolt through hole 24 formed in the rear mounting portion 23 to connect to the welding nut 12 installed in the rear mounting bracket 11.

[0046] In the event of a vehicle collision, the device of the present invention for preventing the subframe from being pushed backward, which is used to disrupt the relationship between the subframe 10 and the wireless charging pad 20 connected as described above, includes a plastic hinge bracket 110, a hinge member 120, a rubber member 130, and a push bracket member 140.

[0047] One side of the push bracket component 140 is fixed to the front end component 32, and the push bracket component 140 is arranged between the subframe 10 and the wireless charging pad 20.

[0048] More specifically, the push bracket member 140 is formed by a fixing part 141 and a bolt cutting part 142, one side of the fixing part 141 is fixed to the front surface of the front end member 32, and the bolt cutting part 142 is bent from the fixing part 141 and formed as an extension to be arranged between the subframe 10 and the wireless charging plate 20.

[0049] In addition, bolt through holes 143 and 144 are formed in the bolt cutting portion 142, so the front bolt 41 and the middle bolt 42 are respectively arranged to pass through the front bolt through hole 143 and the middle bolt through hole 144.

[0050] In other words, when a forward collision occurs with the pusher member 140 connected to the front end member 32 and the position of the pusher member 140 fixed by the front bolt 41 and the middle bolt 42, the collision energy absorption box 31 is compressed due to the collision load path, and then the front end member 32 is compressed and deformed in sequence. The front end member 32 moves backward due to compression and generates shear force in the front bolt 41 and the middle bolt 42, thereby causing the front bolt 41 and the middle bolt 42 to break.

[0051] Therefore, once the front bolt 41 and the middle bolt 42 are cut, the subframe 10 is separated from the wireless charging plate 20, while only the rear mounting remains.

[0052] After the front bolt 41 and the middle bolt 42 are sheared, the plastic hinge bracket 110 causes the subframe 10 to deform only under its own rigidity.

[0053] The plastic hinge bracket 110 is mounted on the rear mounting portion 23 of the wireless charging pad 20, and the hinge component 120 is hinged to one side of the plastic hinge bracket 110.

[0054] In one embodiment, the hinge member 120 may be hinged to the upper rear side of the plastic hinge support 110.

[0055] To correspond to the bolt through-hole 24 of the rear mounting portion 23, a bracket through-hole 111 is formed in the plastic hinge bracket 110, and a hinge through-hole 121 is also formed in the hinge member 120. Therefore, the rear bolt 43 is inserted into the plastic hinge bracket 110 through the bolt through-hole 24, and then the rear bolt 43 passes through the threaded portion of the bracket through-hole 111 and is inserted into the weld nut 12 in the rear mounting bracket 11 of the subframe 10, thereby achieving connection.

[0056] Since the diameter of the hinge through hole 121 corresponds to the diameter of the threaded portion of the rear bolt 43, the diameter of the hinge through hole 121 can be formed to be smaller than the diameter of the bracket through hole 111 of the plastic hinge bracket 110 into which the head of the rear bolt 43 is inserted.

[0057] Additionally, a rubber component 130 is inserted between the head of the rear bolt 43 and the inner surface of the bracket through-hole 111, the head of which is inserted into the bracket through-hole 111 of the plastic hinge bracket 110. In the event of a frontal vehicle collision, the rubber component 130 causes the rear bolt 43 to be smoothly released from the bracket through-hole 111 of the plastic hinge bracket 110.

[0058] As described above, the plastic hinge bracket 110, the push bracket member 140, and other components can be configured in pairs to correspond to the two side components of the subframe 10.

[0059] To further describe the plastic hinge, in a bent beam, when the load increases beyond the elastic limit of the beam material, the plastic region begins at the outermost edge of the beam and eventually the entire cross-section of the beam enters the plastic region. That is, one side of the neutral axis is plastically compressed, while the other side is plastically stretched. In this state, the beam pivots continuously as a hinge while maintaining a constant bending moment. The bending moment in this state is called the full plastic moment, and the mechanical state of a cross-section with a full plastic moment is called a plastic hinge.

[0060] In the following text, reference will be made to Figures 5 to 9B The operational state arising from the device according to the invention for preventing the subframe from being pushed backward during a vehicle collision is described.

[0061] Figure 5 The shape of the side surface of the vehicle before the collision is shown. Figure 6 The shape of the lower surface of the vehicle before the collision is shown. The push bracket member 140 is located between the subframe 10 and the wireless charging pad 20, and the front bolt 41 and the middle bolt 42 pass through the push bracket member 140 to connect to the subframe 10.

[0062] Figure 7 The shape of the side surface of the vehicle after the collision is shown. Figure 8 The shape of the lower surface after a vehicle collision is shown. In a frontal collision, the collision energy-absorbing box 31 is compressed due to the collision load path, and then the front end member 32 is compressed and deformed in sequence.

[0063] Therefore, the extent to which the support member 140 is moved backward is approximately the same as the compression amount L of the front member 32, thereby generating shear force in the front bolt 41 and the intermediate bolt 42, causing shear fracture of the front bolt 41 and the intermediate bolt 42.

[0064] Therefore, the subframe 10 and the wireless charging plate 20 are separated from each other by the cut front bolt 41 and the cut middle bolt 42, while only the rear mounting remains.

[0065] When only the rear installation is maintained, it achieves Figure 4C The state shown. That is to say, as... Figure 9A and Figure 9B As shown, except for the rear mounting portion 23, the wireless charging pad 20 moves downward due to its own weight, thereby changing as shown by the pivoting operation of the hinge member 120. Figure 4C The state shown.

[0066] In this case, the rear bolt 43 is released from the plastic hinge bracket 110 of the rubber component 130 and remains connected to the weld nut 12 of the subframe 10 together with the hinge component 120.

[0067] Therefore, the plastic hinge bracket 110 (that is, the wireless charging plate 20) is supported only by the engagement force between the weld nut 12 and the rear bolt 43, and the subframe 10 is separated from the wireless charging plate 20, thus possessing only its existing rigidity to allow for deformation. This prevents the high-voltage battery from being impacted by rearward thrust.

[0068] According to the device for preventing the subframe of an electric vehicle with a wireless charging pad from being pushed backward according to the present invention, the relationship between the subframe and the wireless charging pad is disrupted in the event of a collision with a vehicle in front, so as to cause deformation by reducing the rigidity of the subframe, thereby ensuring the stability of the high-voltage battery by preventing the subframe from being pushed backward.

[0069] Although the invention has been described with reference to the accompanying drawings, it will be apparent to those skilled in the art that various changes and modifications can be made without departing from the spirit and scope of the invention, and not limited to the exemplary forms disclosed herein. Therefore, it should be noted that such substitutions or modifications fall within the scope of the invention.

Claims

1. An apparatus for a subframe of an electric vehicle having a wireless charging pad, the apparatus comprising: The front-end component is located in front of the subframe of the electric vehicle; A wireless charging pad is installed below the subframe; as well as A push-support component is disposed between the subframe and the wireless charging pad, and one side of the push-support component is connected to the front-end component. The front bolt passing through the front mounting portion of the wireless charging pad is configured to pass through a front bolt through hole formed in the push bracket member to engage with the subframe. The intermediate bolt passing through the intermediate mounting portion formed behind the front mounting portion of the wireless charging pad is configured to pass through the intermediate bolt through hole formed in the push bracket member to engage with the subframe. The device further includes: A plastic hinge bracket is mounted on the rear mounting portion of the wireless charging pad, wherein a through-hole is formed in the plastic hinge bracket; and A hinge component configured to hingely connect to the upper end of the plastic hinge support, wherein a hinge through-hole is formed in the hinge component. In the event of a frontal collision, The front bolt and the middle bolt broke, and The wireless charging pad rotates about the hinge axis of the hinge member.

2. The device for a subframe of an electric vehicle with a wireless charging pad according to claim 1, wherein, One side of the pusher bracket component is connected to the front surface of the front end component.

3. The device for a subframe of an electric vehicle with a wireless charging pad according to claim 1, wherein, The push support components are configured as a pair of push support components, arranged at positions corresponding to the two side components constituting the subframe.

4. The device for a subframe of an electric vehicle with a wireless charging pad according to claim 1, wherein, The hinge component is hinged to the upper rear side of the plastic hinge bracket.

5. The device for a subframe of an electric vehicle with a wireless charging pad according to claim 1, wherein, The rear bolts passing through the rear mounting section are configured to pass through the bracket through-hole and the hinge through-hole for engagement with the subframe.

6. The apparatus for a subframe of an electric vehicle having a wireless charging pad according to claim 5, wherein, Upon a frontal collision, the rear bolt is released from the plastic hinge bracket, allowing the wireless charging pad to move downwards due to its own weight.

7. The apparatus for a subframe of an electric vehicle having a wireless charging pad according to claim 5, wherein: The diameter of the hinge through hole corresponds to the threaded portion of the rear bolt; The head of the rear bolt is inserted into the through hole of the bracket.

8. The apparatus for a subframe of an electric vehicle having a wireless charging pad according to claim 7, wherein, A rubber component is inserted between the inner surface of the bracket through hole and the head of the rear bolt.

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