A spare tire mounting bracket for a vehicle

Abstract

The application discloses a kind of automobile spare tire mounting bracket, including outer spare tire support, support chassis interface seat, limit metal chain, spare tire passive air release and license plate, outer spare tire support is installed on the support chassis interface seat, support chassis interface seat is fixedly installed on the tail chassis structure;Support chassis interface seat is connected with the outer spare tire support by the limit metal chain, and the spare tire passive air release and license plate are fixedly installed on the outer spare tire support.The application combines the advantages of hard connection and soft connection when the hard connection is broken, the metal chain of soft connection limits the movement of the broken part, improving safety.At the same time, vertical rotation design is adopted, which is convenient for opening the trunk or disassembling the spare tire, avoiding the risk of "door kill".The spare tire passive air release can quickly deflate when high-speed rear-end collision occurs, preventing the spare tire from rolling or bouncing, reducing the risk of traffic accidents.The deflated spare tire also has cushioning, reducing subsequent impact.

Description

Technical Field

[0001] This invention relates to the field of automotive spare tire configuration technology, specifically to an automotive spare tire mounting bracket. Background Technology

[0002] A car equipped with a spare tire is typically referred to as a spare tire system or spare tire configuration. This system includes the spare tire itself and the bracket or device used to secure and store it. As part of a vehicle's emergency equipment, the spare tire is designed to respond quickly to unexpected situations, such as tire damage or a leak, ensuring driving safety and smooth operation. The design and configuration of spare tire systems vary depending on the car model and manufacturer. Some vehicles may also be equipped with spare tire-related tools and instructions to help owners change tires correctly and quickly when needed.

[0003] The location of the spare tire on a car varies depending on the model and manufacturer's design. However, generally speaking, the spare tire is usually located in the following positions:

[0004] The most common way to install a spare tire is in the trunk. After opening the trunk, the spare tire is usually hidden under a mat or partition. This design not only saves space but also doesn't affect the overall aesthetics of the car.

[0005] Rear-mounted: Some models, especially off-road SUVs, opt to mount the spare tire at the rear. This design not only saves interior space and makes it easy to access, but also adds a touch of ruggedness and character.

[0006] Under the chassis: Some vehicles place the spare tire under the chassis. This design is relatively rare, but it also has its unique advantages, such as better protection of the spare tire from external environmental factors.

[0007] Spare tires are not standard equipment on cars, so some older models or specially designed vehicles still do not come equipped with one. However, when a car needs a spare tire, a fixed external spare tire carrier is often installed at the rear. This design not only meets the needs of vehicles that require a spare tire but also ensures that the spare tire can be securely stored outside the vehicle for quick replacement in an emergency.

[0008] While current external spare tire carrier designs take into account avoiding interference with the normal opening of the trunk, the traditional horizontal rotation method still poses certain safety hazards. When opening the trunk or removing the spare tire, this design increases the risk of the spare tire carrier colliding with surrounding objects or pedestrians, thus increasing the risk of "door-opening" accidents. More seriously, when a car equipped with an external spare tire carrier is involved in a high-speed rear-end collision, the spare tire carrier itself is susceptible to severe impact, potentially leading to breakage. Once the spare tire carrier breaks, not only will the carrier itself detach from the car, but the high-pressure spare tire will also fly out. This not only exacerbates the injury rate in accidents but, due to the rolling and bouncing characteristics of the spare tire, may also trigger unpredictable subsequent traffic accidents, posing a serious threat to road safety.

[0009] Therefore, it is essential to invent a car spare tire mounting bracket. Summary of the Invention

[0010] This invention provides a car spare tire mounting bracket, which offers the following technical solution: It includes an external spare tire bracket, a bracket chassis connecting seat, a limiting metal chain, a spare tire passive deflation device, and a license plate. The external spare tire bracket is mounted on the bracket chassis connecting seat, which is fixedly mounted on the rear chassis structure of the vehicle. The bracket chassis connecting seat is connected to the external spare tire bracket via the limiting metal chain. The spare tire passive deflation device and license plate are fixedly mounted on the external spare tire bracket.

[0011] The external spare tire bracket includes a spare tire frame cover, a license plate outer panel, a spare tire fixing plate, deformation slots, A-links, a support rod, and mounting holes. The spare tire passive deflation device and the license plate outer panel are fixedly installed on the spare tire frame cover. The license plate is fixedly installed on the outer side of the license plate outer panel, and the spare tire fixing plate is fixedly installed on the inner side of the license plate outer panel. The deformation slots are evenly spaced on the spare tire frame cover. A-links are symmetrically fixedly installed on the lower part of the spare tire frame cover and connected to one end of a limiting metal chain through the A-links. The upper end of the spare tire frame cover is fixedly connected to the support rod, and the lower end of the support rod has a through mounting hole, through which it is mounted to the bracket chassis connecting seat.

[0012] The bracket chassis connecting seat includes a base, a mounting head, a B-link, a mounting plate, a limiting shaft, a pin hole, and a limiting pin. The base is installed together with the rear chassis structure through the mounting head fixedly installed on one side. The B-link is symmetrically fixedly installed on the other side of the base and connected to the other end of the limiting metal chain through the B-link. The mounting plate is provided between the two B-links and is fixedly installed on the base. The limiting shaft is fixedly installed on the inner side of the two mounting plates, and a pin hole is provided on one side of the limiting shaft. The pin hole is opened on the mounting plate, and the limiting pin and the limiting shaft are both set in the mounting hole opened in the support rod.

[0013] The spare tire passive deflation device includes a spare tire limiting plate, a storage cylinder, a deformation cover, a firing pin, a spring, a reaction shell, a primer, gunpowder, a deflation head, and a deflation chamber. The spare tire limiting plate is fixedly installed on the spare tire frame cover. Storage cylinders are fixedly installed at both ends of the spare tire limiting plate. The deformation cover is installed on the outside of the storage cylinder. The firing pin and spring are installed inside the storage cylinder. The reaction shell is elastically slidably installed inside the storage cylinder by the spring. A primer is installed on the reaction shell, which is filled with gunpowder. A deflation head is installed at one end of the shell. One end of the deflation head passes through the reaction shell, the storage cylinder, and the deformation cover in sequence. A deflation chamber is opened inside the deflation head.

[0014] Preferably, the spare tire frame is circular, and the spare tire limiting plate and the license plate outer plate fixedly installed on the spare tire frame are both "U" shaped structures. The spare tire fixing plate installed on the license plate outer plate is used to fix the spare tire in place by bolts.

[0015] Preferably, the deformation groove on the spare tire frame is an annular groove, and a support rod is provided on one side of the deformation groove; the limiting pin on the support rod is a three-quarter circular through hole, while the limiting shaft and the limiting pin provided on the inner side are respectively a two-quarter semicircular geometric body of the same size and a one-quarter circular geometric body of the same size.

[0016] Preferably, the limiting metal chain is a metal chain composed of multiple ring buckles, and the two ends of the limiting metal chain are connected to link A and link B respectively, and link A and link B are circular rings.

[0017] Preferably, the deformation cover installed at one end of the storage cylinder is a cover body composed of at least three sector plates. The center of the sector plates of the deformation cover is provided with a slot that allows the vent head to pass through. The deformation cover will deform under external pressure.

[0018] Preferably, the spring is located outside the firing pin, the firing pin and the primer are on the same horizontal line, and the primer is an ignition structure consisting of a primer cover, gunpowder, diaphragm and drill base from the outside to the inside.

[0019] Preferably, one end of the reaction shell adopts an inwardly curved arc head, which allows one end of the venting head to be confined inside. One end of the venting head is located on one side of the gunpowder, and the two ends of the venting head are a pointed end and a wide end, respectively. The wide end of the venting head is located inside the arc head of the reaction shell, and the outer surface of the wide end is an arc surface that fits with the arc head of the reaction shell.

[0020] Preferably, the vent head has an overall "T" shaped structure, and the venting cavity inside the vent head is composed of a main venting part and a branch part. The vent head is penetrated by the main venting part of the venting cavity inside, and the branch part of the venting cavity is opened at the tip of the vent head and is connected to the main venting part.

[0021] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0022] 1. The external spare tire bracket of this invention is ingenious, combining a rigid connection of the bracket chassis connector with a flexible connection of a limiting metal chain. When the bracket is involved in a high-speed rear-end collision, if the rigid connection cannot withstand the strong impact and breaks, the limiting metal chain of the flexible connection will immediately come into play, limiting the range of movement of the broken part, effectively reducing the potential harm that may follow, thereby greatly improving the safety of the occupants of the vehicle.

[0023] 2. This invention abandons the traditional horizontal rotation mode and innovatively adopts a vertical rotation method.

[0024] When it's necessary to open the trunk or remove the spare tire, simply pull out the limiting pin, and the external spare tire bracket will rotate along an axis perpendicular to the ground, eventually remaining smoothly parallel to the ground. This design cleverly avoids the risk of traffic accidents such as "door-opening accidents," adding an extra layer of protection for driving safety.

[0025] 3. The spare tire passive deflation device of this invention has a unique passive triggering mechanism, enabling rapid deflation of the spare tire in the event of a high-speed rear-end collision. When the rear of the vehicle is subjected to a high-speed impact, the external spare tire bracket will first deform and move towards the trunk. Once the spare tire passive deflation device contacts the trunk, as the bracket further deforms, its internal propellant will be triggered, and the deflation head will quickly insert into the spare tire to release the air. The deflated spare tire will lose its high-pressure state and will no longer have the ability to roll or bounce, thereby effectively preventing potential subsequent traffic accidents and threats to road safety. At the same time, the deflated spare tire also has a certain degree of cushioning, which can reduce the damage caused by subsequent impact forces to a certain extent. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0027] Figure 2 This is an exploded structural diagram of the present invention.

[0028] Figure 3 This is a schematic diagram of the external spare tire bracket structure of the present invention.

[0029] Figure 4 This is a schematic diagram of the support chassis connecting seat structure of the present invention.

[0030] Figure 5 This is a schematic diagram of the passive deflation device for the spare tire made of steel according to the present invention.

[0031] Figure 6 This is a partial cross-sectional structural diagram of the spare tire passive deflation device of the present invention.

[0032] Figure 7 This is the present invention. Figure 6 A magnified schematic diagram of the structure at point A.

[0033] In the picture:

[0034] External spare tire bracket 1, spare tire frame cover 11, license plate outer plate 12, spare tire fixing plate 13, deformation groove 14, A-link 15, support rod 16, mounting hole 17, bracket chassis connecting seat 2, base 21, mounting head 22, B-link 23, mounting plate 24, limiting shaft 25, pin hole 26, limiting pin 27, limiting metal chain 3, spare tire passive deflation device 4, spare tire limiting plate 41, storage cylinder 42, deformation cover 43, firing pin 44, spring 45, reaction shell 46, primer 47, gunpowder 48, deflation head 49, deflation chamber 40, license plate 5. Detailed Implementation

[0035] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0036] As attached Figure 1-7 As shown:

[0037] This invention provides a car spare tire mounting bracket, comprising an external spare tire bracket 1, a bracket chassis connecting seat 2, a limiting metal chain 3, a spare tire passive deflation device 4, and a license plate 5. The external spare tire bracket 1 is mounted on the bracket chassis connecting seat 2, which is fixedly mounted on the rear chassis structure of the vehicle. The bracket chassis connecting seat 2 is connected to the external spare tire bracket 1 via the limiting metal chain 3. The spare tire passive deflation device 4 and the license plate 5 are fixedly mounted on the external spare tire bracket 1. The external spare tire bracket 1, the bracket chassis connecting seat 2, the limiting metal chain 3, and the spare tire passive deflation device 4 are made of high-strength materials and have excellent impact resistance.

[0038] The external spare tire bracket 1 includes a spare tire frame cover 11, a license plate outer plate 12, a spare tire fixing plate 13, a deformation groove 14, an A-link 15, a support rod 16, and a mounting hole 17. The spare tire passive deflation device 4 and the license plate outer plate 12 are fixedly installed on the spare tire frame cover 11. The license plate 5 is fixedly installed on the outer side of the license plate outer plate 12, and the spare tire fixing plate 13 is fixedly installed on the inner side of the license plate outer plate 12. The deformation grooves 14 are equidistantly opened on the spare tire frame cover 11. The A-link 15 is symmetrically fixedly installed on the lower part of the spare tire frame cover 11 and is connected to one end of the limiting metal chain 3 through the A-link 15. This design allows the bracket to reduce the risk of breakage caused by the hard connection through the flexible connection of the metal chain when subjected to strong impact. The upper end of the spare tire frame cover 11 is fixedly connected to the support rod 16. The lower end of the support rod 16 has a through mounting hole 17 and is installed together with the bracket chassis connecting seat 2 through the mounting hole 17.

[0039] The bracket chassis connecting seat 2 includes a base 21, a mounting head 22, a B-link 23, a mounting plate 24, a limiting shaft 25, a pin hole 26, and a limiting pin 27. The base 21 is installed together with the rear chassis structure through the mounting head 22 fixedly installed on one side. The B-link 23 is symmetrically fixedly installed on the other side of the base 21 and is connected to the other end of the limiting metal chain 3 through the B-link 23. The mounting plate 24 is arranged between the two B-links 23 and is fixedly installed on the base 21. The limiting shaft 25 is fixedly installed on the inner side of the two mounting plates 24, and a pin hole 26 is provided on one side of the limiting shaft 25. The pin hole 26 is opened on the mounting plate 24. The limiting pin 27 and the limiting shaft 25 are both arranged in the mounting hole 17 opened in the support rod 16. The external spare tire bracket 1 rotates along an axis perpendicular to the ground, so that the bracket is parallel to the ground, which greatly avoids the risk of traffic accidents such as "door opening kill".

[0040] The spare tire passive deflation device 4 includes a spare tire limiting plate 41, a storage cylinder 42, a deformation cover 43, a firing pin 44, a spring 45, a reaction shell 46, a primer 47, gunpowder 48, a deflation head 49, and a deflation chamber 40. The spare tire limiting plate 41 is fixedly installed on the spare tire frame cover 11. The storage cylinder 42 is fixedly installed at both ends of the spare tire limiting plate 41. The deformation cover 43 is installed on the outside of the storage cylinder 42. The firing pin 44 and the spring 45 are installed inside the storage cylinder 42. The reaction shell 46 is elastically slidably installed inside the storage cylinder 42 by the spring 45. The primer 47 is installed on the reaction shell 46 and is filled with gunpowder 48. A deflation head 49 is installed at one end of the reaction shell 46. One end of the deflation head 49 passes through the reaction shell 46, the storage cylinder 42, and the deformation cover 43 in sequence. The deflation head 49 has a deflation chamber 40 inside. It adopts a passive triggering mechanism and can quickly deflate the spare tire when subjected to impacts such as high-speed rear-end collisions.

[0041] Example 1:

[0042] Specifically, the spare tire frame cover 11 has a circular structure, and the spare tire limiting plate 41 and the license plate outer plate 12 fixedly installed on the spare tire frame cover 11 are both "U" shaped structures. The spare tire fixing plate 13 installed on the license plate outer plate 12 is used to fix the spare tire in place by bolts.

[0043] Specifically, the deformation slot 14 on the spare tire frame cover 11 is an annular slot. The spare tire frame cover 11 is uniquely designed so that it can not only firmly fix the spare tire, but also deform appropriately through the deformation slot 14 when necessary to absorb impact force. A support rod 16 is provided on one side of the deformation slot 14.

[0044] Specifically, the limiting pin 27 on the support rod 16 is a three-quarter circular through hole, while the limiting shaft 25 and the limiting pin 27 on the inner side are respectively a two-quarter semi-circular geometric body of the same size and a one-quarter circular geometric body of the same size. The setting of the limiting pin 27 and the limiting shaft 25 not only ensures the stable installation of the support rod 16, but also makes it easy to rotate the bracket when the trunk needs to be opened or the spare tire needs to be removed.

[0045] Specifically, the limiting metal chain 3 is a metal chain composed of multiple ring buckles. Both ends of the limiting metal chain 3 are connected to link A 15 and link B 23, respectively. Link A 15 and link B 23 are circular rings. As a flexible connection method, the limiting metal chain 3 plays a crucial role in the event of a hard connection failure. When a car suffers a high-speed rear-end collision or other severe impact, if the hard connection breaks, the limiting metal chain 3 will restrict the range of motion of the fractured structure, reducing potential subsequent damage.

[0046] Specifically, the storage cylinder 42 has a vent hole for leaking the gas inside the spare tire and the high-pressure gas generated by the gunpowder. A deformation cover 43 installed at one end of the storage cylinder 42 is a cover composed of at least three sector-shaped plates. A slot is formed at the center between the sector plates of the deformation cover 43, allowing the vent head 49 to pass through. The deformation cover 43 deforms under external pressure. When the car experiences a strong impact, the deformation cover 43 deforms under external pressure, thereby triggering the working mechanism of the spare tire passive deflation device 4. This design ensures that the vent head 49 can smoothly pass through for deflation, while also absorbing some energy during the impact, reducing damage to the bracket and spare tire.

[0047] Specifically, the spring 45 is located outside the striker 44. The striker 44 and the primer 47 are on the same horizontal line. The primer 47, from the outside in, is an ignition structure consisting of a primer cover, gunpowder, diaphragm, and drill bit. The main function of the spring 45 is to provide restoring force, ensuring that the primer 47 in the reaction shell 46 can quickly return to its original position after colliding with the striker 44. When the car is subjected to a strong impact, the vent head 49 moves inward and drives the reaction shell 46 to compress the spring 45. Subsequently, the primer 47 in the reaction shell 46 collides with the striker 44. This design ensures that the primer 47 can accurately and quickly strike the striker 44 when subjected to sufficient external force, thereby triggering the ignition mechanism. As the core part of the ignition structure, the primer 37's primer cover protects the gunpowder, preventing it from spontaneously combusting without impact. The gunpowder is the key substance for ignition. When impacted by the striker 44, the gunpowder will burn rapidly and produce high-temperature, high-pressure gas. The diaphragm controls the speed and intensity of gunpowder combustion, ensuring the stability and reliability of the ignition process. The drill bit is responsible for fixing the position of the primer, ensuring its stability.

[0048] Specifically, one end of the reaction shell 46 adopts an inwardly curved arc head, which allows one end of the vent head 49 to be confined within it. This confinement ensures that the vent head 49 remains stable under normal operating conditions and will not shift or fall off due to vibration or other external forces. Simultaneously, this design also provides necessary support and guidance when the vent head 49 is triggered, allowing it to move along a predetermined path and direction. One end of the vent head 49 is located on one side of the gunpowder 48, and the two ends of the vent head 49 are a pointed tip and a wide end, respectively. This shape design makes it easier for the vent head 49 to puncture the tire upon impact, achieving a rapid deflation effect. The wide end of the vent head 49 is located inside the arc head of the reaction shell 46. This design not only increases structural stability but also allows the vent head 49 to remain in a safe position when not triggered, preventing accidental tire punctures. The outer surface of the wide end is an arc surface that fits the arc head of the reaction shell 46. This design not only enhances the tightness of the connection between the venting head and the reaction shell, but also allows the venting head 49 to move along a predetermined trajectory by utilizing the interaction between its arc surface and the arc head when the venting head 49 is triggered, ensuring the accuracy and effectiveness of the venting operation.

[0049] Specifically, the venting chamber 40 inside the venting head 49 consists of a main venting section and a branch section. This design makes the venting process more efficient and uniform. The main venting section runs through the entire venting head 49 and is the main venting channel, quickly expelling gas from the tire. The branch section is located at the tip of the venting head 49 and connects to the main venting section, further expanding the venting area and range, making the venting more thorough. When the device is triggered, the venting head 49 quickly punctures the tire, and the gas inside the tire is rapidly discharged through the main venting section and the branch section of the venting chamber 40. Because the branch section is located at the tip of the venting head, it ensures uniform gas distribution during the venting process, avoiding localized high or low pressure. In addition, the "T"-shaped structure design allows the venting head to maintain a certain degree of stability after puncturing the tire, preventing displacement or detachment due to gas impact. This stability ensures the continuity and reliability of the venting process, allowing the entire device to play its maximum role at critical moments.

[0050] Example 2:

[0051] Working principle:

[0052] Deformation slot 14 and support structure: The deformation slot 14 designed on the spare tire cover 11 allows it to deform when subjected to external impact, absorbing the impact force and protecting the spare tire to a certain extent. The mounting structure between the support rod 16 and the base 21 allows the entire bracket to be rotated when necessary, facilitating the opening of the trunk or the removal of the spare tire.

[0053] The buffering effect of the limiting metal chain 3: The limiting metal chain 3 connects the spare tire frame cover 11 and the bracket chassis connecting seat 2. When the bracket is subjected to a strong impact, the metal chain can act as a soft connection to buffer the impact and reduce the risk of hard connection breakage.

[0054] The working mechanism of the spare tire passive deflation device 4: When the car is subjected to a strong impact such as a high-speed rear-end collision, the spare tire cover 11 is deformed under pressure, and the spare tire passively triggers the internal spare tire passive deflation device 4. Under the action of the impact force, the deflation head 49 moves inward and compresses the spring 45, and finally the primer 47 comes into contact with the firing pin 44 and collides. After the primer 47 is ignited, the gunpowder 48 burns rapidly, and the high-temperature and high-pressure gas generated pushes the deflation head 49 outward, puncturing the spare tire and realizing the deflation function.

[0055] Example 3:

[0056] Workflow:

[0057] Normal driving condition:

[0058] The external spare tire bracket 1 is securely mounted on the rear chassis structure. The spare tire is secured by the spare tire cover 11, the spare tire mounting plate 13, and the license plate outer plate 12. The spare tire passive deflation device 4 is in an untriggered state, the deformation cover 43 is intact, and the striker 44 and primer 47 remain separated. The limiting metal chain 3 connects link A 15 and link B 23 to ensure the stability of the bracket structure.

[0059] Impacted:

[0060] When the car is subjected to a strong impact, the deformation groove 14 begins to deform, absorbing part of the impact force. If the impact force is large enough, the spare tire cover 11 is subjected to pressure and undergoes severe deformation, thereby squeezing the spare tire and triggering the spare tire passive deflation device 4. Under the action of the impact force, the deflation head 49 moves inward and compresses the spring 45, and finally the primer 47 comes into contact with the firing pin 44 and collides. After the primer 47 is ignited, the gunpowder 48 burns rapidly, producing high-temperature and high-pressure gas. The high-temperature and high-pressure gas pushes the deflation head 49 outward, puncturing the spare tire and releasing the air.

[0061] Deflating and recovery:

[0062] Gas inside the spare tire is rapidly expelled through the vent chamber 40 inside the vent head 49, reducing the air pressure inside the spare tire. If the impact force is too great and causes the rigid connection to break, the limiting metal chain 3 will restrict the range of motion of the broken structure to prevent further damage.

[0063] Follow-up operations:

[0064] When it is safe to do so, the driver can inspect and replace the damaged spare tire. If it is necessary to open the trunk or remove the spare tire, this can be done by rotating the structure between the support rod 16 and the base 21.

[0065] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A spare tire mounting bracket for automobiles, characterized in that: The vehicle includes an external spare tire bracket (1), a bracket chassis connecting seat (2), a limiting metal chain (3), a spare tire passive deflation device (4), and a license plate (5). The external spare tire bracket (1) is mounted on the bracket chassis connecting seat (2), which is fixedly mounted on the rear chassis structure. The bracket chassis connecting seat (2) is connected to the external spare tire bracket (1) via the limiting metal chain (3). The spare tire passive deflation device (4) and the license plate (5) are fixedly mounted on the external spare tire bracket (1). The external spare tire bracket (1) includes a spare tire frame cover (11), a license plate outer plate (12), a spare tire mounting plate (13), a deformation groove (14), an A-link (15), a support rod (16), and mounting holes (17). The spare tire passive deflation device (4) and the license plate outer plate (12) are fixedly installed on the spare tire frame cover (11). The license plate (5) is fixedly installed on the outer side of the license plate outer plate (12), and the spare tire mounting plate is fixedly installed on the inner side of the license plate outer plate (12). (13); The spare tire frame cover (11) is provided with the deformation slots (14) at equal intervals. The spare tire frame cover (11) is symmetrically fixedly installed with A chain links (15) at the bottom and connected to one end of the limiting metal chain (3) through the A chain links (15); The spare tire frame cover (11) is fixedly connected to the upper end of the support rod (16). The lower end of the support rod (16) is provided with a mounting hole (17) and is installed together with the bracket chassis connecting seat (2) through the mounting hole (17); The bracket chassis connecting seat (2) includes a base (21), a mounting head (22), a B-link (23), a mounting plate (24), a limiting shaft (25), a pin hole (26), and a limiting pin (27). The base (21) is installed together with the rear chassis structure through the mounting head (22) fixedly installed on one side. The B-link (23) is symmetrically fixedly installed on the other side of the base (21) and is connected to the other end of the limiting metal chain (3) through the B-link (23). The mounting plate (24) is provided between the two B chain links (23). The mounting plate (24) is fixedly installed on the base (21). The inner side of the two mounting plates (24) is fixedly installed with a limiting shaft (25). A pin hole (26) is provided on one side of the limiting shaft (25). The pin hole (26) is opened on the mounting plate (24). The limiting pin (27) and the limiting shaft (25) are both provided in the mounting hole (17) opened in the support rod (16). The spare tire passive deflation device (4) includes a spare tire limiting plate (41), a storage cylinder (42), a deformation cover (43), a firing pin (44), a spring (45), a reaction shell (46), a primer (47), gunpowder (48), a deflation head (49) and a deflation cavity (40). The spare tire limiting plate (41) is fixedly installed on the spare tire frame cover (11). Storage cylinders (42) are fixedly installed at both ends of the spare tire limiting plate (41). The deformation cover (43) is installed outside the storage cylinder (42). The firing pin (44) and the spring (45) are installed inside the storage cylinder (42). The reaction shell (46) is elastically slidably installed inside the storage cylinder (42) through the spring (45). A primer (47) is installed on the reaction shell (46), and gunpowder (48) is filled inside it. And a deflation head (49) is installed at one end inside. One end of the deflation head (49) sequentially passes through the reaction shell (46), the storage cylinder (42) and the deformation cover (43). A deflation cavity (40) is opened inside the deflation head (49).

2. The automotive spare tire mounting bracket as described in claim 1, characterized in that: The spare tire frame cover (11) is of a circular structure. The spare tire limiting plate (41) and the license plate outer plate (12) fixedly installed on the spare tire frame cover (11) are both of a "U" - shaped structure. The spare tire fixing disc (13) installed on the license plate outer plate (12) fixes and installs the spare tire through bolts.

3. The automotive spare tire mounting bracket as described in claim 1, characterized in that: The deformation notch (14) opened on the spare tire frame cover (11) is an annular notch. A support rod (16) is provided on one side of the deformation notch (14); the limit pin (27) opened on the support rod (16) is a three - quarters circular through - hole, and the limit shaft (25) and the limit pin (27) provided on the inner side are respectively a two - quarters semi - circular geometric body of the same size and a one - quarters circular geometric body of the same size.

4. The automotive spare tire mounting bracket as described in claim 1, characterized in that: The limiting metal chain (3) is a metal chain composed of multiple annular buckles. Both ends of the limiting metal chain (3) are connected to the A - link (15) and the B - link (23) respectively. The A - link (15) and the B - link (23) are circular rings.

5. The automotive spare tire mounting bracket as described in claim 1, characterized in that: The deformation cover (43) installed at one end of the storage cylinder (42) is a cover body composed of at least three sector - shaped discs. A slot hole allowing the deflation head (49) to pass through is opened at the center between the sector - shaped plates of the deformation cover (43). The deformation cover (43) will deform under external pressure.

6. The automotive spare tire mounting bracket as described in claim 1, characterized in that: The spring (45) is located outside the firing pin (44). The firing pin (44) and the primer (47) are on the same horizontal line. The primer (47) is an ignition structure composed of a primer cover, gunpowder, a diaphragm and a drill base from outside to inside in sequence.

7. The automotive spare tire mounting bracket as described in claim 1, characterized in that: One end of the reaction shell (46) adopts an inward - bent arc head, which allows one end of the deflation head (49) to be restricted inside. One end of the deflation head (49) is located on one side of the gunpowder (48). Both ends of the deflation head (49) are a tip and a wide end respectively. The wide end of the deflation head (49) is located inside the arc head of the reaction shell (46), and the outer surface of this wide end is an arc surface that fits the arc head of the reaction shell (46).

8. The automobile spare tire mounting bracket as described in claim 1, characterized in that: The vent head (49) has a "T" shaped structure. The vent cavity (40) inside the vent head (49) is composed of a main venting part and a branch part. The vent head (49) is penetrated by the main venting part of the vent cavity (40), and the branch part of the vent cavity (40) is opened at the tip of the vent head (49) and is connected to the main venting part.

Images