An external split differential case suspension structure and vehicle

Abstract

The utility model discloses a kind of externally-hung transfer case suspension structure and vehicle, belong to vehicle accessories field.Its technical scheme is, a kind of externally-hung transfer case suspension structure, including left support assembly and right support assembly, left support assembly includes left suspension fixed seat and left suspension connecting support, right support assembly includes right suspension fixed seat and right suspension connecting support, left suspension connecting support and right suspension connecting support are respectively used to connect the both ends of transfer case, left suspension fixed seat and right suspension fixed seat are respectively used to connect the frame rail of both sides, and left suspension fixed seat is connected on the outside of frame rail.By connecting support assembly on the outside of frame rail, break through the space limit of traditional beam built-in structure, can be adapted to the transfer case of bulky in large torque vehicle model, without changing frame rail main structure, reduce vehicle model development cost.

Description

Technical Field

[0001] This utility model relates to the field of vehicle parts, and in particular to an external transfer case suspension structure and vehicle. Background Technology

[0002] The transfer case is a core component of the powertrain system in four-wheel drive vehicles, primarily used in off-road vehicles, heavy-duty trucks, and other models requiring multi-wheel drive. It is typically installed between the transmission and the drive axle and is a crucial device for power distribution. Internally, through gear sets, clutches, and other structures, it precisely transmits the engine's power output to the front and rear axles. The transfer case not only performs the core function of power distribution but also adjusts the torque distribution ratio between the front and rear axles according to road conditions, ensuring sufficient traction on complex terrains such as mud, inclines, and icy roads, while also maintaining stability and fuel economy on paved roads.

[0003] The existing transfer case installation method on vehicles is mainly the crossbeam built-in type, that is, it is installed between the two longitudinal beams of the frame. For example, the transfer case suspension structure described in patent CN117485114A has brackets set on both sides of the transfer case, and the brackets on both sides are installed on the inner side of the two longitudinal beams of the frame.

[0004] However, to meet the market demand for high-torque four-wheel drive vehicles, the transfer case in the powertrain needs to have its torque capacity increased accordingly. However, this results in a larger transfer case size, making it unsuitable for traditional beam-mounted structures, thus limiting the development of related vehicle models. Summary of the Invention

[0005] This utility model addresses the problem that current large transfer cases cannot be adapted to the existing beam-in-place installation method, and provides an external transfer case suspension structure.

[0006] To address the aforementioned problems, this utility model employs an externally mounted transfer case suspension structure, comprising a left bracket assembly and a right bracket assembly. The left bracket assembly includes a left suspension fixing seat and a left suspension connecting bracket, while the right bracket assembly includes a right suspension fixing seat and a right suspension connecting bracket. The left and right suspension connecting brackets are respectively used to connect the two ends of the transfer case. The left and right suspension fixing seats are respectively used to connect the longitudinal beams of the vehicle frame on both sides, and at least one of the left and right suspension fixing seats is connected to the outside of the longitudinal beams of the vehicle frame. By connecting at least one bracket assembly to the outside of the longitudinal beams of the vehicle frame, the spatial limitations of the traditional built-in crossbeam structure are overcome, allowing for the adaptation of larger transfer cases in high-torque vehicles without modifying the main structure of the longitudinal beams of the vehicle frame, thus reducing vehicle development costs. Simultaneously, the left and right bracket assemblies respectively connect the two ends of the transfer case to the longitudinal beams of the vehicle frame on both sides, forming a symmetrical support structure, ensuring the stability of the transfer case after installation and avoiding vibration and displacement problems caused by unilateral force.

[0007] As a preferred embodiment of an externally mounted transfer case suspension structure, the left suspension mounting bracket includes a frame connecting plate and two side plates. The two side plates are respectively vertically connected to the two vertical edges of the frame connecting plate, which is fitted and connected to the outer side of the frame longitudinal beam. The left bracket assembly also includes a lower extension bracket, which is fixedly connected to the side plates. The left suspension connecting bracket is installed at the lower end of the lower extension bracket. The design of the frame connecting plate fitting snugly to the outer side of the frame longitudinal beam increases the installation contact area, improves connection stability, and avoids occupying the inner space of the frame longitudinal beam. The combination of the two side plates and the lower extension bracket allows for flexible adjustment of the transfer case installation height, adapting to the layout requirements of transfer cases of different sizes. Furthermore, the two side plates can disperse the torque load during transfer case operation, preventing localized stress concentration and deformation of the left suspension mounting bracket.

[0008] As a preferred implementation of an external transfer case mounting structure, the lower extension bracket is U-shaped, including two connecting arms. A cross arm is provided between the lower ends of the two connecting arms, and the upper ends of the two connecting arms are respectively connected to two side plates. The left suspension connecting bracket is connected to the cross arm. Compared with a flat plate bracket, the U-shaped lower extension bracket is lighter while improving bending and torsional resistance, and can better withstand the weight and vibration impact of the transfer case. The cross arm provides a flat and stable installation reference for the left suspension connecting bracket, ensuring the coaxiality of the connection between the left suspension connecting bracket and the transfer case, reducing eccentric vibration during transfer case operation. At the same time, the design of the cross arm also increases the installation and operation space, facilitating the disassembly and maintenance of the transfer case later.

[0009] As a preferred embodiment of an external transfer case mounting structure, the left suspension connecting bracket includes a first vertical plate, a first horizontal plate on one side of the first vertical plate, and the other side of the first vertical plate for connecting the transfer case. The first horizontal plate is parallel to the horizontal arm vertically, and a square rubber pad is provided between the first horizontal plate and the horizontal arm. The first horizontal plate, the horizontal arm, and the square rubber pad are connected by bolts. The vertical structure of the first vertical plate and the first horizontal plate ensures the vertical connection between the transfer case and the lower extension bracket, guaranteeing the verticality of the transfer case after installation and avoiding power transmission deviation caused by transfer case tilting. The square rubber pad effectively absorbs the vibration generated during the operation of the transfer case, reducing the transmission of vibration to the vehicle frame longitudinal beams and improving vehicle ride comfort. At the same time, the bolt-through connection ensures reliable connection of each component and facilitates the replacement and maintenance of the square rubber pad in the future.

[0010] As a preferred embodiment of an external transfer case mounting structure, the bolt is a bolt with a hole, the bolt head being located below the crossarm. A circular rubber washer is provided between the bolt head and the crossarm. A slotted nut is installed at the upper end of the bolt shank, and a cotter pin is provided in the bolt hole, engaging with the slot of the slotted nut. The combination of the bolt with hole, the slotted nut, and the cotter pin forms a double anti-loosening structure, effectively preventing bolt loosening due to vibration during vehicle operation and ensuring the long-term reliability of the mounting structure. The circular rubber washer further buffers vibration friction between the bolt head and the crossarm, preventing component wear, while filling the gap between the bolt head and the crossarm, improving connection stability and reducing abnormal noise.

[0011] As a preferred embodiment of an external transfer case mounting structure, the first horizontal plate is located in the middle of the first vertical plate, and first reinforcing ribs are provided between the upper and lower surfaces of the first horizontal plate and the first vertical plate. The location of the first horizontal plate in the middle of the first vertical plate ensures that the force of the transfer case is evenly transmitted to the first vertical plate, avoiding force concentration. The first reinforcing ribs on the upper and lower surfaces significantly improve the connection strength and rigidity between the first vertical plate and the first horizontal plate, enabling it to withstand the load impact of a high-torque transfer case, preventing cracking or deformation at the connection between the first horizontal plate and the first vertical plate after long-term use, and extending the service life of the left suspension connection bracket.

[0012] As a preferred implementation of an external transfer case mounting structure, the right suspension mounting bracket is L-shaped, including a third vertical plate and a third horizontal plate that are perpendicular to each other. The right suspension connecting bracket includes a second vertical plate, one side of which has a second horizontal plate, and the other side of which is used to connect the transfer case. The second horizontal plate and the third horizontal plate are parallel vertically, and a square rubber pad is provided between the second horizontal plate and the third horizontal plate. The second horizontal plate, the third horizontal plate, and the square rubber pad are connected by bolts. The L-shaped right suspension mounting bracket has a compact structure and can flexibly adapt to the installation space inside or outside the frame longitudinal beam, improving the compatibility of the structural layout. The cooperation structure of the second vertical plate and the second horizontal plate forms symmetrical support with the left suspension, ensuring the levelness of the transfer case after installation and avoiding uneven loading of the transfer case. The square rubber pad also plays a role in vibration damping and buffering, working together with the left square rubber pad to further reduce the impact of transfer case vibration on the whole vehicle and improve vehicle driving comfort.

[0013] As a preferred embodiment of an external transfer case mounting structure, the bolt head is located below the third horizontal plate, and a circular rubber pad is provided between the bolt head and the third horizontal plate. The design of the bolt head being located below the third horizontal plate prevents the bolt head from being exposed and damaged by impact, while also facilitating bolt installation and removal from above. The circular rubber pad buffers vibration friction between the bolt head and the third horizontal plate, reducing component wear, filling gaps, and improving the stability of the bolt connection. Combined with the square rubber pad on the right side, it further optimizes the vibration damping effect of the right-side mounting.

[0014] As a preferred embodiment of an external transfer case mounting structure, a third reinforcing rib is provided between the third vertical plate and the third horizontal plate; the second horizontal plate is located in the middle of the second vertical plate, and second reinforcing ribs are provided between the upper and lower surfaces of the second horizontal plate and the second vertical plate. The third reinforcing rib between the third vertical plate and the third horizontal plate improves the structural strength of the L-shaped right suspension mounting base and prevents it from deforming due to the load of the transfer case; the second reinforcing ribs on the upper and lower surfaces of the second horizontal plate enhance the connection rigidity between the second vertical plate and the second horizontal plate, enabling the right suspension to stably bear the weight and torque of the transfer case. The symmetrical reinforcing rib design on both sides ensures that the entire suspension system is subjected to balanced forces, further improving the load-bearing capacity and service life of the suspension structure, and adapting to the long-term use requirements of high-torque vehicles.

[0015] On the other hand, this utility model also provides a vehicle, including a frame longitudinal beam and a transfer case, wherein the frame longitudinal beam and the transfer case are connected by the aforementioned external transfer case mounting structure. By adopting this external transfer case mounting structure, the vehicle can smoothly mount a high-torque transfer case, overcoming the bottleneck of traditional models being unable to upgrade the transfer case due to space limitations, thus improving the vehicle's off-road performance and power performance. Simultaneously, the vibration damping design of this mounting structure can reduce the impact of transfer case vibration on the vehicle, improving the vehicle's ride smoothness and comfort. Furthermore, the structure is easy to install and maintain, helping to reduce vehicle production and subsequent maintenance costs.

[0016] As can be seen from the above technical solutions, the advantages of this utility model are as follows: by connecting the left suspension mounting bracket to the outside of the frame longitudinal beam, it breaks through the spatial limitations of the traditional built-in crossbeam structure, and can directly adapt to the increased volume of the transfer case in high-torque vehicles, without modifying the main structure of the frame longitudinal beam, significantly reducing vehicle development costs; the left and right bracket assemblies symmetrically connect the two ends of the transfer case to the two sides of the frame longitudinal beam, and the double-side plate design of the left suspension mounting bracket, U... The bending and torsional resistance of the lower extension bracket, along with the reinforcing ribs at the left and right suspension connection brackets, effectively disperses the torque load and weight impact during the transfer case's operation, preventing deformation or cracking caused by localized stress concentration. This ensures the horizontality, verticality, and coaxiality of the transfer case after installation, preventing unilateral force vibration deviation or power transmission misalignment, and is suitable for the long-term use requirements of high-torque transfer cases. The combination design of square and round rubber pads absorbs transfer case vibration at multiple levels, reducing transmission to the frame and the entire vehicle, improving ride smoothness and comfort. The double anti-loosening structure formed by perforated bolts, slotted nuts, and cotter pins prevents bolts from loosening during vehicle operation, while reducing component wear, minimizing abnormal noise, and extending the structural lifespan. The lower extension bracket's crossarm increases the installation and operation space, and the through-bolt connection facilitates component disassembly and gasket replacement. The L-shaped right suspension mounting bracket can flexibly adapt to the inner and outer spaces of the frame's longitudinal beams, improving the compatibility of different vehicle models. For vehicles, it can be smoothly equipped with a high-torque transfer case to improve off-road and power performance. At the same time, thanks to the structure's vibration damping design and easy maintenance characteristics, it balances driving comfort with production and subsequent maintenance cost control. Attached Figure Description

[0017] To more clearly illustrate the technical solution of this patent, the drawings used in the description will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this patent. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0018] Figure 1 This is a structural schematic diagram of a specific embodiment of the present utility model.

[0019] Figure 2This is an assembly diagram of the left support assembly, right support assembly, and transfer case in a specific embodiment of this utility model.

[0020] Figure 3 This is a schematic diagram of the left support assembly in a specific embodiment of the present invention.

[0021] Figure 4 This is a schematic diagram of the right bracket assembly in a specific embodiment of the present invention.

[0022] Explanation of main figure symbols 1. Right suspension mounting bracket, 1-1. Third vertical plate, 1-2. Third horizontal plate, 1-3. Third reinforcing rib, 2. Right suspension connecting bracket, 2-1. Second vertical plate, 2-2. Second horizontal plate, 2-3. Second reinforcing rib, 3. Transfer case, 4. Left suspension mounting bracket, 4-1. Frame connecting plate, 4-2. Side plate, 5. Lower extension bracket, 5-1. Connecting arm, 5-2. Cross arm, 6. Square rubber pad, 7. Round rubber pad, 8. Left suspension connecting bracket, 8-1. First vertical plate, 8-2. First horizontal plate, 8-3. First reinforcing rib, 9. Bolt, 10. Slotted nut, 11. Cotter pin, 12. Frame longitudinal beam. Detailed Implementation

[0023] To make the objectives, features, and advantages of this patent more apparent and understandable, the technical solutions of this patent will be clearly and completely described below with reference to the accompanying drawings of the specific embodiments. Obviously, the embodiments described below are only some embodiments of this patent, and not all embodiments. Based on the embodiments of this patent, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this patent.

[0024] Example 1 As shown in Figures 1 and 2, an externally mounted transfer case suspension structure includes a left bracket assembly and a right bracket assembly. The left bracket assembly includes a left suspension mounting seat 4 and a left suspension connecting bracket 8, and the right bracket assembly includes a right suspension mounting seat 1 and a right suspension connecting bracket 2. The left suspension connecting bracket 8 and the right suspension connecting bracket 2 are respectively connected to the two ends of the transfer case to form a double-sided fixation of the transfer case. The left suspension mounting seat 4 and the right suspension mounting seat 1 are respectively connected to the longitudinal beams of the vehicle frame on both sides. In order to adapt to the volume requirements of the high-torque transfer case, at least one of the left suspension mounting seat 4 and the right suspension mounting seat 1 is externally mounted and directly connected to the outside of the longitudinal beam of the vehicle frame.

[0025] like Figure 3As shown, the left bracket assembly includes a left suspension mounting base 4, a lower extension bracket 5, and a left suspension connecting bracket 8. The left suspension mounting base 4 includes a frame connecting plate 4-1 and two side plates 4-2. The two side plates 4-2 are vertically connected to the vertical edges of the frame connecting plate 4-1 on both sides. The frame connecting plate 4-1 is attached to and connected to the outer side of the frame longitudinal beam, increasing the contact area to improve the connection strength. The lower extension bracket 5 has a U-shaped structure, specifically including two connecting arms 5-1 and one horizontal arm 5-2. The horizontal arm 5-2 is located between the lower ends of the two connecting arms 5-1. The upper ends of the two connecting arms 5-1 are fixed to the two side plates 4-2 of the left suspension mounting base 4, forming a downwardly extending support structure. The left suspension connecting bracket 8 includes a first vertical plate 8-1 and a first horizontal plate 8-2. The first horizontal plate 8-2 is located on one side of the first vertical plate 8-1 and in the middle position. The other side is used to connect the transfer case. The first horizontal plate 8-2 is parallel to the horizontal arm 5-2 of the lower extension bracket 5. A square rubber pad 6 is provided between the two and they are connected by a bolt 9. The bolt 9 is a bolt with a hole. Its bolt head is located below the horizontal arm 5-2. A circular rubber pad 7 is provided between the bolt head and the horizontal arm 5-2. A slotted nut 10 is installed at the upper end of the bolt. A cotter pin 11 is provided in the opening of the bolt 9. The cotter pin 11 is inserted into the slot of the slotted nut 10 to form an anti-loosening structure. At the same time, a first reinforcing rib 8-3 is provided between the upper and lower sides of the first horizontal plate 8-2 and the first vertical plate 8-1 to improve the structural strength to cope with load impact.

[0026] like Figure 4As shown, the right bracket assembly includes a right suspension mounting base 1 and a right suspension connecting bracket 2, which work together with the left bracket assembly to achieve horizontal fixation of the transfer case. The right suspension mounting bracket 1 has an L-shaped structure, consisting of a third vertical plate 1-1 and a third horizontal plate 1-2 that are perpendicular to each other. A third reinforcing rib 1-3 is provided between the third vertical plate 1-1 and the third horizontal plate 1-2 to enhance the deformation resistance of the L-shaped structure. The right suspension connecting bracket 2 includes a second vertical plate 2-1 and a second horizontal plate 2-2. The second horizontal plate 2-2 is located on one side of the second vertical plate 2-1 and in the middle position. The other side of the second vertical plate 2-1 is used to connect the transfer case. The second horizontal plate 2-2 is parallel to the third horizontal plate 1-2 of the right suspension mounting bracket 1, and a square rubber pad 6 is provided between them. They are connected by a bolt 9. The bolt head of the bolt 9 is located below the third horizontal plate 1-2, and a circular rubber pad 7 is provided between the bolt head and the third horizontal plate 1-2 to achieve buffering and wear prevention. At the same time, a second reinforcing rib 2-3 is provided between the upper and lower surfaces of the second horizontal plate 2-2 and the second vertical plate 2-1 to further enhance the right suspension connecting bracket 2. The structural rigidity ensures that it can stably withstand the weight and torque load of the transfer case.

[0027] Example 2 This embodiment further provides a vehicle, including a frame longitudinal beam 12 and a transfer case 3. The frame longitudinal beam 12 and the transfer case 3 are connected by an external transfer case mounting structure provided in Embodiment 1. By adopting this external transfer case mounting structure, the vehicle can smoothly mount a high-torque transfer case, breaking through the bottleneck of traditional models that cannot upgrade the transfer case due to space limitations, thus improving the vehicle's off-road performance and power performance. At the same time, the vibration damping design of this mounting structure can reduce the impact of transfer case vibration on the vehicle, improving the vehicle's ride smoothness and comfort. Moreover, the structure is easy to install and maintain, which helps to reduce vehicle production and subsequent maintenance costs.

[0028] As can be seen from the above embodiments, the beneficial effects of this utility model are as follows: by connecting the left suspension mounting bracket to the outside of the frame longitudinal beam, it breaks through the spatial limitations of the traditional built-in crossbeam structure, and can directly adapt to the increased volume of the transfer case in high-torque vehicles, without modifying the main structure of the frame longitudinal beam, thus significantly reducing vehicle development costs; the left and right bracket assemblies symmetrically connect the two ends of the transfer case to the two sides of the frame longitudinal beam, and the double-side plate design of the left suspension mounting bracket, U... The bending and torsional resistance of the lower extension bracket, along with the reinforcing ribs at the left and right suspension connection brackets, effectively disperses the torque load and weight impact during the transfer case's operation, preventing deformation or cracking caused by localized stress concentration. This ensures the horizontality, verticality, and coaxiality of the transfer case after installation, preventing unilateral force vibration deviation or power transmission misalignment, and is suitable for the long-term use requirements of high-torque transfer cases. The combination design of square and round rubber pads absorbs transfer case vibration at multiple levels, reducing transmission to the frame and the entire vehicle, improving ride smoothness and comfort. The double anti-loosening structure formed by perforated bolts, slotted nuts, and cotter pins prevents bolts from loosening during vehicle operation, while reducing component wear, minimizing abnormal noise, and extending the structural lifespan. The lower extension bracket's crossarm increases the installation and operation space, and the through-bolt connection facilitates component disassembly and gasket replacement. The L-shaped right suspension mounting bracket can flexibly adapt to the inner and outer spaces of the frame's longitudinal beams, improving the compatibility of different vehicle models. For vehicles, it can be smoothly equipped with a high-torque transfer case to improve off-road and power performance. At the same time, thanks to the structure's vibration damping design and easy maintenance characteristics, it balances driving comfort with production and subsequent maintenance cost control.

[0029] The above description of the disclosed embodiments enables those skilled in the art to implement or use this patent. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this patent. Therefore, this patent is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An external transfer case mounting structure, comprising a left bracket assembly and a right bracket assembly, characterized in that, The left bracket assembly includes a left suspension mounting base (4) and a left suspension connecting bracket (8), and the right bracket assembly includes a right suspension mounting base (1) and a right suspension connecting bracket (2). The left suspension connecting bracket (8) and the right suspension connecting bracket (2) can respectively connect to the two ends of the transfer case. The left suspension mounting base (4) and the right suspension mounting base (1) can respectively connect to the longitudinal beams (12) of the frame on both sides, and at least one of the left suspension mounting base (4) and the right suspension mounting base (1) is connected to the outside of the longitudinal beam (12).

2. The external transfer case mounting structure according to claim 1, characterized in that, The left suspension mounting bracket (4) includes a frame connecting plate (4-1) and two side plates (4-2). The two side plates (4-2) are respectively vertically connected to the vertical edges on both sides of the frame connecting plate (4-1). The frame connecting plate (4-1) can be attached to and connected to the outside of the frame longitudinal beam (12). The left bracket assembly also includes a lower extension bracket (5). The lower extension bracket (5) is fixedly connected to the side plates (4-2). The left suspension connecting bracket (8) is installed at the lower end of the lower extension bracket (5).

3. The external transfer case mounting structure according to claim 2, characterized in that, The lower extension bracket (5) is U-shaped and includes two connecting arms (5-1). A cross arm (5-2) is provided between the lower ends of the two connecting arms (5-1). The upper ends of the two connecting arms (5-1) are respectively connected to two side plates (4-2). The left suspension connecting bracket (8) is connected to the cross arm (5-2).

4. The external transfer case mounting structure according to claim 3, characterized in that, The left suspension connecting bracket (8) includes a first vertical plate (8-1), a first horizontal plate (8-2) is provided on one side of the first vertical plate (8-1), and the other side of the first vertical plate (8-1) is used to connect the transfer case; the first horizontal plate (8-2) is parallel to the horizontal arm (5-2) vertically, and a square rubber pad (6) is provided between the first horizontal plate (8-2) and the horizontal arm (5-2), and the first horizontal plate (8-2), the horizontal arm (5-2) and the square rubber pad (6) are connected by bolts (9).

5. The external transfer case mounting structure according to claim 4, characterized in that, The bolt (9) is a bolt with a hole. The bolt head of the bolt (9) is located below the cross arm (5-2). A circular rubber pad (7) is also provided between the bolt head of the bolt (9) and the cross arm (5-2). A slotted nut (10) is installed on the upper end of the bolt (9). A cotter pin (11) is provided in the opening of the bolt (9). The cotter pin (11) is inserted into the slot of the slotted nut (10).

6. The external transfer case mounting structure according to claim 4, characterized in that, The first horizontal plate (8-2) is located in the middle of the first vertical plate (8-1), and the upper and lower surfaces of the first horizontal plate (8-2) are provided with a first reinforcing rib (8-3) between the first vertical plate (8-1) and the first horizontal plate (8-2).

7. The external transfer case mounting structure according to claim 1, characterized in that, The right suspension mounting bracket (1) is L-shaped and includes a third vertical plate (1-1) and a third horizontal plate (1-2) that are perpendicular to each other; the right suspension connecting bracket (2) includes a second vertical plate (2-1), one side of the second vertical plate (2-1) is provided with a second horizontal plate (2-2), and the other side of the second vertical plate (2-1) is used to connect the transfer case; the second horizontal plate (2-2) is parallel to the third horizontal plate (1-2) vertically, and a square rubber pad (6) is provided between the second horizontal plate (2-2) and the third horizontal plate (1-2), and the second horizontal plate (2-2), the third horizontal plate (1-2) and the square rubber pad (6) are connected by bolts (9).

8. The external transfer case mounting structure according to claim 7, characterized in that, The bolt head of the bolt (9) is located below the third horizontal plate (1-2), and a circular rubber pad (7) is provided between the bolt head of the bolt (9) and the third horizontal plate (1-2).

9. The external transfer case mounting structure according to claim 7, characterized in that, A third reinforcing rib (1-3) is provided between the third vertical plate (1-1) and the third horizontal plate (1-2); the second horizontal plate (2-2) is located in the middle of the second vertical plate (2-1), and a second reinforcing rib (2-3) is provided between the upper and lower surfaces of the second horizontal plate (2-2) and the second vertical plate (2-1).

10. A vehicle comprising a frame longitudinal beam (12) and a transfer case (3), characterized in that, The longitudinal beam (12) of the frame and the transfer case (3) adopt an external transfer case suspension structure as described in any one of claims 1-9.

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