A multifunctional subframe

Abstract

The present invention relates to a multifunctional subframe, which relates to the technical field of vehicle body structure, comprising a subframe, wherein the subframe is provided with two front sleeves and two rear sleeves for connection and installation, and the subframe is provided with a protective device; the protective device comprises an inner protective sleeve inserted from the bottom of the subframe and installed in the front sleeve, the inner protective sleeve is provided with an annular groove, two pressure sensors are symmetrically installed in the annular groove of the inner protective sleeve, two embedded circular grooves for installing the pressure sensors are provided in the annular groove of the inner protective sleeve, an inner resisting ring is slidingly provided in the annular groove of the inner protective sleeve through two push springs, and a resisting sub-part is provided in the front sleeve above the inner protective sleeve; the present invention has the effects of reducing vibration and road noise at the connection of the subframe and improving sound insulation effect, and can monitor the deformation of the connection part of the subframe in real time, and at the same time can optimize the space utilization of the subframe and improve the safety performance during collision.

Description

Technical Field

[0001] The present application relates to the technical field of vehicle body structures, and in particular to a multifunctional subframe. Background Art

[0002] A subframe is a structure that serves as an auxiliary to the main frame in vehicles such as automobiles. It primarily supports and secures components such as the suspension and exhaust systems. It provides excellent suspension connection rigidity, shields against road vibrations, and provides excellent ride comfort. It effectively shares the load of the main frame, enhancing overall vehicle stability and safety. Subframes are typically constructed from materials such as steel or aluminum alloy to ensure sufficient strength and rigidity.

[0003] For example, in the existing Chinese patent application number CN220826586U, a subframe is disclosed, which includes a first insertion slot, a first connector, a second insertion slot, and a second connector. The first connector is provided with a first insertion slot and a second insertion slot, and the second connector is provided with a first connector and a second connector. The first connector and the second connector are mutually engaged and limitedly connected through the first insertion slot, the first connector, and the second insertion slot and the second connector, and the connection between the first connector and the second connector is coated with solder. With the above-mentioned prior art, when in use, the subframe is modularized by docking the various connectors in the corresponding insertion slots. This reduces the waste of raw materials when machining errors result in defective workpieces, and facilitates assembly. If the frame is damaged during daily use, the damaged part can be easily removed and replaced.

[0004] However, the above-mentioned prior art has the following technical defects:

[0005] When using the above-mentioned prior art, it is necessary to first connect the first and second connectors through the first plug slot, the first plug connector, the second plug slot and the second plug connector, and then tighten and fix them with bolts and nuts. Then, a mold is wrapped around the connection between the first and second connectors, and solder is filled into the mold for welding, so that the first and second connectors are connected and fixed to each other to form a subframe. Subsequently, the suspension, exhaust and other related components are fixed to the frame body through the fixing holes at various positions for use. During subsequent driving of the vehicle, road vibrations are continuously transmitted to the subframe through the suspension system. Although the subframe can effectively block vibrations and noise from directly entering the vehicle, vibrations still exist at the connection between the subframe and the main frame, that is, at the location of the fixing holes in the above-mentioned device. In addition, no corresponding shock-absorbing components are provided at the fixing holes. Long-term use under high-frequency vibration conditions can easily reduce the service life of the connection between the subframe and the main frame and related connecting parts.

[0006] Secondly, when a vehicle is involved in a collision or bumps on uneven roads during daily driving, the fixing holes connecting the subframe to the main frame may deform, creating a safety hazard. The above-mentioned prior art fails to alert the vehicle owner to the damaged connection, making it difficult for the owner to promptly inspect and repair the deformed area to eliminate the safety hazard. Furthermore, the above-mentioned device assembles the subframe by fastening the first and second connectors together with bolts and nuts, followed by welding. This makes the welds susceptible to cracks or even collapse in the event of a collision, and the overall strength of the subframe is reduced by tightening only with bolts and nuts.

[0007] Based on this, on the basis of the existing subframe, in order to overcome the above technical defects, there is still room for improvement. Summary of the Invention

[0008] In order to reduce vibration and road noise at the subframe connection, improve sound insulation, monitor the deformation of the subframe connection in real time, optimize the space utilization of the subframe and improve safety performance during collision, the present application provides a multifunctional subframe.

[0009] This application provides a multifunctional subframe, which adopts the following technical solutions:

[0010] A multifunctional subframe comprises a subframe, wherein the subframe has two front sleeves and two rear sleeves for connection and installation, and the subframe is provided with a protective device;

[0011] The protective device includes an inner protective sleeve inserted from the bottom of the subframe and installed in the front sleeve, the inner protective sleeve has an annular groove, two pressure sensors are symmetrically installed in the annular groove of the inner protective sleeve, two embedded circular grooves for installing the pressure sensors are opened in the annular groove of the inner protective sleeve, an inner resistance ring is slidably arranged in the annular groove of the inner protective sleeve through two push springs, and the bottom of the inner resistance ring is symmetrically provided with assembly circular grooves for the contraction installation of the two push springs, and a resistance sub-component is provided in the front sleeve above the inner protective sleeve.

[0012] Preferably, the interference sub-component includes an upper sleeve installed in the front sleeve by two locking bolts, and the upper sleeve is symmetrically provided with end circular holes for installing the two locking bolts. The upper end of the front sleeve has two internal threaded holes adapted to the locking bolts, and a plurality of pressing rods are equidistantly arranged vertically downward at the bottom of the upper sleeve.

[0013] Preferably, the pressing rod is made of glass.

[0014] Preferably, the sub-frame is further provided with a shock absorbing assembly, and the shock absorbing assembly includes rubber gaskets respectively clamped on the upper end of the upper sleeve and the lower end of the inner protective sleeve.

[0015] Preferably, an upper shock-absorbing sleeve and a lower shock-absorbing sleeve are respectively inserted and installed at the upper port and the lower port of the rear sleeve, and a plurality of dispersion holes are penetrated through the lower shock-absorbing sleeve and the upper shock-absorbing sleeve, and the upper end of the upper shock-absorbing sleeve and the lower end of the lower shock-absorbing sleeve respectively have dispersion grooves connected to the plurality of dispersion holes.

[0016] Preferably, a battery compartment for installing a battery is provided at the bottom of the sub-frame, and a closing component is provided at the bottom of the sub-frame at a port of the battery compartment.

[0017] Preferably, the closing assembly includes a closing cover plate that is covered at the battery compartment port by fasteners, a closing slot for installing the closing cover plate is provided at the bottom of the sub-frame, and a middle sound insulation felt is provided on the bottom side of the closing cover plate.

[0018] Preferably, the fastener includes a T-shaped retaining piece symmetrically mounted on the bottom of the closing cover, the closing cover is symmetrically provided with a limit slot for the installation of the T-shaped retaining piece, the T-shaped retaining piece is provided with a fastening bolt, the T-shaped retaining piece is penetrated by an assembly hole for the installation of the fastening bolt, and the bottom of the subframe is provided with an assembly threaded hole adapted for the fastening bolt at the covering slot.

[0019] Preferably, a temperature sensor is installed on the sub-frame, and a connecting slot hole communicating with the battery compartment for installing the temperature sensor is opened on the sub-frame.

[0020] Preferably, a bottom guard is provided at the bottom of the sub-frame, and the bottom guard includes a reinforcing beam symmetrically embedded and installed at the bottom of the sub-frame, and an embedding groove for installing the reinforcing beam is symmetrically opened at the bottom of the sub-frame, and the reinforcing beam has a plurality of rectangular guide grooves, and a side sound insulation felt is provided at the bottom of the reinforcing beam.

[0021] In summary, this application includes at least one of the following beneficial technical effects:

[0022] 1. By clamping the rubber gaskets installed on the upper sleeve and the inner protective sleeve and inserting the upper shock-absorbing sleeve and the lower shock-absorbing sleeve installed in the rear sleeve, the subframe can be connected to the frame body through the front sleeve and the rear sleeve, and the vibration of the connection can be reduced during the vehicle driving.

[0023] 2. After the upper sleeve is installed in the front sleeve using the locking bolt, the bottom ends of the multiple pressing rods will always contact the upper side of the inner ring, so that the lower side of the inner ring contacts and fits on the two pressure sensors. At this time, the front sleeve can be monitored in real time, and when a collision occurs and the deformation is serious, the owner can be warned in time.

[0024] 3. The battery compartment at the bottom of the subframe facilitates battery installation and optimizes space utilization. The reinforcement beam further enhances the overall strength of the subframe, reducing vibration at the joints and improving the subframe's sound insulation by installing side sound insulation felt at the bottom of the reinforcement beam. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is an overall schematic diagram of the present invention.

[0026] Figure 2 It is a schematic diagram of the front sleeve and the rear sleeve of the present invention.

[0027] Figure 3 It is an exploded view of the protective device of the present invention (viewed from bottom to top).

[0028] Figure 4 It is a schematic diagram of the inner protective sleeve and pressure sensor of the present invention.

[0029] Figure 5 It is an exploded view of the push spring and inner push ring of the present invention (viewed from bottom to top).

[0030] Figure 6 It is a cross-sectional view of the conflicting auxiliary component of the present invention.

[0031] Figure 7 It is an exploded view of the conflicting components of the present invention.

[0032] Figure 8 It is a cross-sectional view of the inner protective sleeve of the present invention.

[0033] Figure 9 It is an exploded view of the rubber gasket of the present invention.

[0034] Figure 10 It is an exploded view of the shock absorbing assembly of the present invention.

[0035] Figure 11 It is a cross-sectional view of the rear sleeve of the present invention.

[0036] Figure 12 Schematic diagram of the closure assembly of the present invention (viewed from bottom to top).

[0037] Figure 13 1 is an exploded view of the closure assembly of the present invention (viewed from bottom to top).

[0038] Figure 14 This invention Figure 13 Enlarged view of area A in the middle.

[0039] Figure 15 It is a cross-sectional view of the subframe and an exploded view of the temperature sensor of the present invention.

[0040] Figure 16 It is an exploded view of some components of the bottom guard of the present invention (viewed from bottom to top).

[0041] Figure 17 It is a cross-sectional exploded view of some parts of the protective assembly of the present invention.

[0042] Explanation of reference numerals: 1. Subframe; 11. Front sleeve; 12. Rear sleeve; 2. Protective device; 21. Inner sleeve; 211. Annular groove; 22. Pressure sensor; 212. Inner circular groove; 23. Push spring; 24. Inner ring; 241. Assembly circular groove; 3. Rejection accessory; 31. Locking bolt; 32. Upper sleeve; 321. End circular hole; 111. Internal threaded hole; 33. Pressing rod; 4. Shock absorber assembly; 41. Rubber gasket; 42. Upper shock absorber sleeve; 43. Lower shock absorber sleeve; 431. Dispersion hole; 421. Dispersion groove; 10 1. Battery compartment; 5. Closing assembly; 6. Fastener; 51. Closing cover; 102. Covering slot; 52. Middle sound insulation felt; 61. T-shaped stopper; 511. Limiting slot; 62. Fastening bolt; 611. Assembly hole; 103. Assembly threaded hole; 13. Temperature sensor; 104. Connecting slot; 7. Bottom guard; 71. Reinforcement beam; 105. Embedded slot; 711. Rectangular guide slot; 72. Side sound insulation felt; 8. Protection assembly; 81. U-shaped energy absorption box; 82. Middle energy absorption box; 83. Side energy absorption box; 811. Crushing induction slot; 84. Sound-absorbing cotton. DETAILED DESCRIPTION

[0043] The following is combined with Figures 1-17 This application is described in further detail.

[0044] The embodiments of the present application disclose a multifunctional subframe that can reduce vibration and road noise at the subframe connection to improve sound insulation, and can monitor the deformation of the subframe connection in real time. At the same time, it can optimize the space utilization of the subframe and improve safety performance during collisions.

[0045] Example 1:

[0046] Reference Figure 1 and Figure 2 As shown, the present application provides a multifunctional subframe, including a subframe 1 having two front sleeves 11 and two rear sleeves 12 for connection and installation. When connecting and installing the subframe 1 to the vehicle frame body, bolts or connecting rods can be inserted into the front sleeves 11 and the rear sleeves 12 to connect to the vehicle frame body. The two front sleeves 11 and the two rear sleeves 12 on the subframe 1 can be regarded as connecting portions that facilitate installation with the vehicle frame body. The subframe 1 is provided with a protective device 2; it is used to reduce vibration at the connection portion and can monitor the degree of deformation of the subframe 1 at the front sleeves 11 in real time when the vehicle is impacted, helping the vehicle owner to promptly eliminate potential safety hazards.

[0047] Reference Figures 3 to 5 As shown, specifically, the protective device 2 includes an inner protective sleeve 21 inserted from the bottom of the subframe 1 and installed in the front sleeve 11. The inner protective sleeve 21 is fixedly installed in the front sleeve 11; the inner protective sleeve 21 has an annular groove 211, and two pressure sensors 22 are symmetrically installed in the annular groove 211 of the inner protective sleeve 21. The pressure sensor 22 is a device or apparatus that can sense a pressure signal and convert the pressure signal into a usable output electrical signal according to a certain rule. Since this is an existing well-known technology, it will not be described in detail here. Two inset circular grooves 212 are defined within the annular groove 211 of the inner protective sleeve 21 for mounting the pressure sensor 22. An inner push ring 24 is slidably positioned within the annular groove 211 of the inner protective sleeve 21, interposed between two push springs 23. Symmetrically defined at the bottom of the inner push ring 24 are assembly circular grooves 241 for the two push springs 23 to retract and mount. The inner push ring 24 slides within the annular groove 211, while the upper ends of the push springs 23 are fixedly mounted in the assembly circular grooves 241. The lower ends of the push springs 23 are fixedly connected to the bottom of the annular groove 211, and the push springs 23 consistently exert a driving force to push the inner push ring 24 upward. A contact subassembly 3 is provided within the front sleeve 11 above the inner protective sleeve 21. This component is used to monitor the degree of deformation of the front sleeve 11 caused by a collision in real time. If the deformation becomes severe and poses a safety hazard, the pressure sensor 22 can output an electrical signal to alert the vehicle owner.

[0048] Before installing the subframe 1 on the main frame, the abutment subassembly 3 must first be installed in the front sleeve 11. The abutment subassembly 3 can push the inner abutment ring 24 downward, causing the lower side of the inner abutment ring 24 to abut against the pressure sensor 22, allowing the pressure sensor 22 to sense a pressure signal. Once the vehicle collides and the front sleeve 11 of the subframe 1 experiences severe deformation, posing a safety hazard, the components of the abutment subassembly 3 will release the abutment on the inner abutment ring 24. The inner abutment ring 24 will move upward and reset under the action of the abutment spring 23. At this point, the pressure sensor 22 is no longer under pressure. The pressure change sensed by the pressure sensor 22 alerts the vehicle owner, enabling real-time monitoring of the degree of deformation of the connection portion of the front sleeve 11 of the subframe 1 after a collision. If the deformation is severe and poses a safety hazard, the vehicle owner can be alerted so that they can conduct timely inspections to eliminate the safety hazard.

[0049] Reference Figures 6 to 8As shown, to ensure contact with the inner abutment ring 24, the pressure sensor 22 is used to monitor the deformation of the front sleeve 11. The abutment subassembly 3 includes an upper sleeve 32 mounted in the front sleeve 11 via two locking bolts 31. The upper sleeve 32 is symmetrically provided with end circular holes 321 for mounting the two locking bolts 31. The upper end of the front sleeve 11 has two internally threaded holes 111 that mate with the locking bolts 31. In this embodiment, three pressing rods 33 are preferably arranged vertically and equidistantly from the bottom of the upper sleeve 32. It should be noted that the pressing rods 33 are made of glass and have a certain degree of hardness to resist easy breakage. High borosilicate glass is preferably used, as it has a high melting point, can withstand large temperature fluctuations, and possesses high impact resistance and compressive strength. When the vehicle is driving outdoors in winter and summer, the three pressing rods 33 located in the front sleeve 11 of the subframe 1 will not be naturally damaged by temperature changes.

[0050] During installation, the upper sleeve 32 is inserted from top to bottom into the front sleeve 11, and then the two locking bolts 31 are threaded through the circular holes 321 at the ends and connected to the two internal threaded holes 111 on the front sleeve 11, thereby firmly connecting the upper sleeve 32 to the front sleeve 11. During the process of inserting and installing the upper sleeve 32, the bottom ends of the three pressing rods 33 will enter the annular groove 211 and press against the inner ring 24 to move downward, causing the bottom of the inner ring 24 to press against the two pressure sensors 22. Since the upper sleeve 32 is fixedly installed in the front sleeve 11 at this time, the pressing rods 33 will always press against the upper side of the inner ring 24, so that the pressure sensors 22 always feel pressure. Once the vehicle collides, the subframe 1 is impacted and the front sleeve 11 is deformed. When the deformation is severe and the three pressing rods 33 in the front sleeve 11 are damaged and broken, the inner ring 24 will no longer be restricted by the resistance of the pressing rod 33. At this time, the driving force of the push spring 23 will move up and reset, separating from the pressure sensor 22. The pressure sensor 22 no longer feels pressure, indicating that after this collision, the connection part of the subframe 1 is severely deformed, posing a safety hazard and requiring timely maintenance.

[0051] However, if the deformation is minor, the pressing rods 33 within the front sleeve 11 are not broken, or only one or two pressing rods 33 are broken, and one pressing rod 33 remains in contact with the inner anvil 24, then the inner anvil 24 will not move upward and reset. This indicates that the deformation of the connection portion of the subframe 1 after the collision is minor and does not pose a safety hazard. Therefore, the subframe 1 does not need to be replaced or repaired. However, due to the breakage of some pressing rods 33, the pressure applied to the pressure sensor 22 will change, and new pressing rods 33 can be replaced during subsequent vehicle maintenance.

[0052] It should also be noted that both the inner protective sleeve 21 and the upper sleeve 32 are made of metal. Installing the inner protective sleeve 21 and the upper sleeve 32 in the front sleeve 11 further enhances the strength of the front sleeve 11, making deformation of the front sleeve 11 of the subframe 1 less likely. When the subframe 1 is subsequently mounted on the vehicle body, bolts or connecting rods, which previously required insertion through the front sleeve 11, now only need to be inserted through the inner protective sleeve 21 and the upper sleeve 32. At this point, the inner protective sleeve 21 and the upper sleeve 32 are integrally formed with the front sleeve 11.

[0053] Reference Figure 9 and Figure 10 As shown, after subframe 1 is mounted on the vehicle body, vibration at the connection portion of subframe 1, namely, at front and rear sleeves 11 and 12, is reduced, thereby extending the service life of the components at the connection and reducing some noise. Therefore, subframe 1 is also provided with a shock-absorbing assembly 4. Shock-absorbing assembly 4 includes rubber washers 41 respectively secured to the upper end of upper sleeve 32 and the lower end of inner protective sleeve 21. After subframe 1 is connected to the vehicle body using bolts or connecting rods inserted through inner protective sleeve 21 and upper sleeve 32, the rubber washers 41 can partially absorb vibration transmitted to the front sleeve 11 of subframe 1.

[0054] Reference Figure 10 and Figure 11 As shown, an upper shock-absorbing sleeve 42 and a lower shock-absorbing sleeve 43 are respectively inserted and installed at the upper and lower ports of the rear sleeve 12. It should be noted that the upper and lower shock-absorbing sleeves 42 and 43 are made of the same rubber material as the rubber gasket 41, and are fixedly installed in the rear sleeve 12. A plurality of dispersed holes 431 are formed through the lower and upper shock-absorbing sleeves 43 and 42, and the upper and lower shock-absorbing sleeves 42 and 43 have dispersed grooves 421 connected to the dispersed holes 431. Similarly, whereas bolts or connecting rods were previously required to be inserted through the rear sleeve 12, they are now required to be inserted through the upper and lower shock-absorbing sleeves 42 and 43. The upper and lower shock-absorbing sleeves 42 and 43 are now integrally provided with the rear sleeve 12.

[0055] By inserting multiple sets of bolts or connecting rods through the two front bushings 11 and the two rear bushings 12 at different locations on the subframe 1, and with the help of multiple rubber washers 41, upper shock-absorbing sleeves 42, and lower shock-absorbing sleeves 43, the vibration transmitted to the connection portion of the subframe 1 during vehicle operation after the subframe 1 is connected and installed to the vehicle frame can be effectively reduced. The dispersion holes 431 and dispersion grooves 421 provided in the upper shock-absorbing sleeves 42 and lower shock-absorbing sleeves 43 further help to reduce vibration.

[0056] Reference Figure 12 and Figure 13 As shown, in order to optimize space utilization and facilitate battery installation in electric or hybrid vehicles, a battery compartment 101 is provided at the bottom of the subframe 1 for battery installation. A closure assembly 5 is provided at the bottom of the subframe 1 at the end of the battery compartment 101 for closing the opening of the battery compartment 101. After installing a battery of an appropriate size in the battery compartment 101, the operator can quickly close the opening of the battery compartment 101 using the closure assembly 5.

[0057] Reference Figure 13 and Figure 14 As shown, to ensure that the battery compartment 101 opening is securely closed after installation, and to block some noise and enhance sound insulation, the closure assembly 5 includes a closure cover 51 that is secured to the end of the battery compartment 101 via fasteners 6. A closure slot 102 is defined at the bottom of the subframe 1 for mounting the closure cover 51, and a central sound insulation felt 52 is positioned on the underside of the closure cover 51. First, the two ends of the closure cover 51 are secured within the closure slots 102, and then the closure cover 51 is securely mounted to the end of the battery compartment 101 via fasteners 6. The central sound insulation felt 52 is a high-density, flexible coiled material primarily made from rubber, polymer materials, and the like, which further reduces the ingress of external noise from the vehicle's underside into the vehicle's interior.

[0058] Reference Figure 14 As shown, since it is necessary to conveniently and quickly cover the closing cover 51 firmly on the port of the battery compartment 101, the fastener 6 includes a T-shaped retaining piece 61 symmetrically arranged at the bottom of the closing cover 51, and a limiting slot 511 for installing the T-shaped retaining piece 61 is symmetrically opened on the closing cover 51, a fastening bolt 62 is provided on the T-shaped retaining piece 61, and an assembly hole 611 for installing the fastening bolt 62 is opened through the T-shaped retaining piece 61, and an assembly threaded hole 103 adapted to the fastening bolt 62 is opened at the bottom of the sub-frame 1 at the covering slot 102. After the two ends of the closing cover 51 are clamped in the covering slot 102, the T-shaped retaining piece 61 is embedded in the limiting slot 511, and the rotating fastening bolt 62 is inserted. In cooperation with the assembly threaded hole 103, the T-shaped retaining piece 61 can be fastened and installed in the limiting slot 511 on the closing cover 51, and the closing cover 51 is limited and fixed to the port of the battery compartment 101 by the T-shaped retaining piece 61.

[0059] Reference Figure 15 As shown, to enable real-time monitoring of vehicle status and provide data support for intelligent driving and safety maintenance, a temperature sensor 13 is mounted on subframe 1. Subframe 1 is also provided with a connection slot 104 that connects to battery compartment 101 for mounting temperature sensor 13. Temperature sensor 13 allows vehicle owners to obtain real-time information about the internal temperature of battery compartment 101, ensuring vehicle safety.

[0060] Reference Figure 16 As shown, to enhance the overall strength of the subframe 1 and prevent deformation from impacts, the subframe 1 is provided with a bottom guard 7. This guard 7 comprises a reinforcing beam 71 symmetrically embedded in the bottom of the subframe 1. It should be noted that the reinforcing beam 71 is made of an aluminum alloy. Symmetrical recesses 105 for the reinforcing beam 71 are formed in the bottom of the subframe 1. The reinforcing beam 71 has a plurality of rectangular guide grooves 711. The rectangular guide grooves 711 reduce the weight of the reinforcing beam 71, preventing the subframe 1 from becoming overweight and increasing vehicle energy consumption. Furthermore, when the subframe 1 is impacted, the reinforcing beam 71 deforms to absorb energy. Lateral sound insulation felt 72 is provided at the bottom of the reinforcing beam 71. Made of the same material as the central sound insulation felt 52, the side sound insulation felt 72 also provides sound insulation, reducing external noise and tire noise from entering the vehicle from the bottom.

[0061] Example 2:

[0062] Reference Figure 17 As shown, on the basis of Example 1, in order to further enhance the safety performance of the vehicle during a collision, an energy-absorbing structure is installed on the subframe 1, so that when the subframe 1 is subjected to a collision, its main position can deform and absorb a large amount of energy. A protective component 8 is provided on the subframe 1, and the protective component 8 includes two U-shaped energy-absorbing boxes 81 symmetrically mounted on the subframe 1, and a middle energy-absorbing box 82 and two side energy-absorbing boxes 83 attached to one side of the subframe 1. The U-shaped energy-absorbing box 81, the middle energy-absorbing box 82 and the side energy-absorbing box 83 all have a plurality of crush-inducing grooves 811, and the crush-inducing grooves 811 are filled with sound-absorbing cotton 84. It should be noted that the U-shaped energy-absorbing box 81, the middle energy-absorbing box 82 and the side energy-absorbing box 83 are all made of aluminum alloy. The designed crush-inducing grooves 811 can deform during a collision and absorb a large amount of energy.

[0063] When the subframe 1 is impacted, the U-shaped crash boxes 81, the center crash boxes 82, and the side crash boxes 83 further enhance the subframe's collision resistance. The sound-absorbing foam 84 within the crush-inducing grooves 811 absorbs and mitigates some external noise during normal vehicle operation, enhancing the subframe's sound insulation.

[0064] The implementation principle of this embodiment is:

[0065] (1) Monitoring assembly: The upper sleeve 32 is inserted into the front sleeve 11 and is securely mounted in the front sleeve 11 by two locking bolts 31. During the insertion and mounting process, the bottom end of the pressing rod 33 enters the annular groove 211 and pushes against the inner ring 24, causing the inner ring 24 to push against the pressure sensor 22, and the pressure sensor 22 is always pressed.

[0066] (2) Connection and Installation: Insert the multiple bolts or connecting rods required for connection and installation through the upper sleeve 32 and inner sleeve 21 in the two front sleeves 11, and the upper shock-absorbing sleeve 42 and lower shock-absorbing sleeve 43 in the two rear sleeves 12, respectively, so that the subframe 1 can be firmly installed on the main frame. After a collision occurs during driving, the different electrical signals output by the pressure sensor 22 can be used to determine whether there is a safety hazard at the connection position of the front sleeve 11 of the subframe 1.

[0067] (3) Shock absorption and sound insulation: The rubber gaskets 41, upper shock-absorbing sleeves 42, and lower shock-absorbing sleeves 43 at various locations can reduce the vibration transmitted to the connection between the subframe 1 and the frame body during driving. In conjunction with the central sound insulation felt 52, the side sound insulation felts 72, and the sound-absorbing cotton 84, they can further reduce external noise and tire noise from entering the vehicle from the bottom of the vehicle.

[0068] (4) Collision protection: In the event of a collision, a large amount of energy can be absorbed by the reinforcing beam 71 provided at the bottom of the subframe 1 and the U-shaped energy absorption box 81, the middle energy absorption box 82 and the side energy absorption box 83 installed on both sides of the subframe 1, thereby improving the overall collision strength of the subframe 1.

[0069] The embodiments of this specific implementation method are all preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Therefore, any equivalent changes made based on the structure, shape, and principle of the present invention should be included in the scope of protection of the present invention.

Claims

1. A multifunctional subframe, comprising a subframe (1), wherein the subframe (1) has two front sleeves (11) and two rear sleeves (12) for connection and installation, characterized in that: The auxiliary frame (1) is provided with a protective device (2); The protective device (2) includes an inner protective sleeve (21) inserted from the bottom of the subframe (1) and installed in the front sleeve (11), the inner protective sleeve (21) has an annular groove (211), two pressure sensors (22) are symmetrically installed in the annular groove (211) of the inner protective sleeve (21), two embedded circular grooves (212) for installing the pressure sensors (22) are opened in the annular groove (211) of the inner protective sleeve (21), an inner push ring (24) is slidably arranged in the annular groove (211) of the inner protective sleeve (21) through two push springs (23), and the bottom of the inner push ring (24) is symmetrically opened with an assembly circular groove (241) for the two push springs (23) to be contracted and installed, and a resistance sub-component (3) is provided in the front sleeve (11) above the inner protective sleeve (21); The abutment subassembly (3) comprises an upper sleeve (32) mounted in the front sleeve (11) via two locking bolts (31), the upper sleeve (32) is symmetrically provided with end circular holes (321) for mounting the two locking bolts (31), the upper end of the front sleeve (11) is provided with two internal threaded holes (111) adapted to the locking bolts (31), and a plurality of pressing rods (33) are vertically and equidistantly arranged at the bottom of the upper sleeve (32); The auxiliary frame (1) is further provided with a shock absorbing assembly (4), and the shock absorbing assembly (4) comprises rubber gaskets (41) respectively clamped on the upper end of the upper sleeve (32) and the lower end of the inner protective sleeve (21); An upper shock-absorbing sleeve (42) and a lower shock-absorbing sleeve (43) are respectively inserted and installed at the upper side port and the lower side port of the rear sleeve (12); a plurality of dispersion holes (431) are respectively opened through the lower shock-absorbing sleeve (43) and the upper shock-absorbing sleeve (42); and a dispersion groove (421) communicating with the plurality of dispersion holes (431) is respectively provided at the upper end of the upper shock-absorbing sleeve (42) and the lower end of the lower shock-absorbing sleeve (43).

2. The multifunctional subframe according to claim 1, characterized in that: The pressing rod (33) is made of glass.

3. The multifunctional subframe according to claim 1, characterized in that: A battery compartment (101) for installing a battery is provided at the bottom of the sub-frame (1), and a closing component (5) is provided at the bottom of the sub-frame (1) at the port of the battery compartment (101).

4. The multifunctional subframe according to claim 3, characterized in that: The closing assembly (5) comprises a closing cover (51) which is covered on the port of the battery compartment (101) via a fastener (6); a covering slot (102) for mounting the closing cover (51) is provided at the bottom of the sub-frame (1); and a middle sound insulation felt (52) is provided on the bottom side of the closing cover (51).

5. The multifunctional subframe according to claim 4, characterized in that: The fastener (6) comprises a T-shaped retaining piece (61) symmetrically mounted on the bottom of the closing cover (51); a limiting slot (511) for mounting the T-shaped retaining piece (61) is symmetrically provided on the closing cover (51); a fastening bolt (62) is provided on the T-shaped retaining piece (61); an assembly hole (611) for mounting the fastening bolt (62) is provided through the T-shaped retaining piece (61); and an assembly threaded hole (103) adapted to the fastening bolt (62) is provided at the bottom of the sub-frame (1) at the covering slot (102).

6. The multifunctional subframe according to claim 3, characterized in that: A temperature sensor (13) is installed on the sub-frame (1), and a connecting slot (104) is provided on the sub-frame (1) for installing the temperature sensor (13) and communicating with the battery compartment (101).

7. The multifunctional subframe according to claim 1, characterized in that: The bottom of the sub-frame (1) is provided with a bottom guard (7), the bottom guard (7) comprises a reinforcing beam (71) symmetrically embedded and installed at the bottom of the sub-frame (1), the bottom of the sub-frame (1) is symmetrically provided with an embedding groove (105) for installing the reinforcing beam (71), the reinforcing beam (71) has a plurality of rectangular guide grooves (711), and the bottom of the reinforcing beam (71) is provided with a side sound insulation felt (72).

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