Roll cage and all terrain vehicle

Abstract

The application belongs to the field of automobiles, and particularly relates to a roll-proof frame and an all-terrain vehicle. The roll-proof frame comprises a cockpit frame, a front engine frame and a rear engine frame. The cockpit frame is of a ball cage type structure. The front engine frame is arranged at the front side of the cockpit frame. The rear engine frame is arranged at the rear side of the cockpit frame and forms a rear engine compartment together with the cockpit frame. The rear engine compartment extends in the front-rear direction and is arranged to accommodate at least the engine and the transmission of the all-terrain vehicle. In the roll-proof frame provided in the application, the rear engine compartment extends in the front-rear direction and has sufficient volume to accommodate the engine and the transmission of the all-terrain vehicle, and the relative positions of the engine and the transmission in the front-rear direction in the rear engine compartment can be adjusted. In this way, the all-terrain vehicle can be arranged in any power layout scheme of mid-mounted rear drive, mid-mounted four-wheel drive, rear-mounted rear drive and rear-mounted four-wheel drive.

Description

Technical Field

[0001] This application belongs to the automotive field, and in particular relates to a roll cage and an all-terrain off-road vehicle. Background Technology

[0002] All-terrain vehicles with roll cage designs are highly safe when driving on complex terrains, as their roll cage design can protect the occupants in the event of a rollover accident.

[0003] The existing roll cage has a relatively compact structure, which limits the layout of the power system. The small size of the rear engine compartment makes it difficult to match the installation of a larger power system, and it can only support a rear-engine, rear-wheel-drive layout, resulting in poor versatility. Utility Model Content

[0004] This application provides a roll cage and an all-terrain vehicle to solve the technical problem of poor versatility of existing frames.

[0005] The first aspect of this application provides a roll cage, including a driver's cab frame, a front engine compartment frame, and a rear engine compartment frame. The driver's cab frame is a ball cage structure. The front engine compartment frame is located on the front side of the driver's cab frame. The rear engine compartment frame is located on the rear side of the driver's cab frame and encloses the driver's cab frame to form a rear engine compartment. The rear engine compartment extends in the front-rear direction and is configured to at least accommodate the engine and transmission of an all-terrain off-road vehicle.

[0006] In an optional embodiment of this application, the width of the aft engine compartment frame is smaller than the rear end width of the cockpit frame.

[0007] In an optional embodiment of this application, the rear width of the forward engine bay frame is greater than the front width of the forward engine bay frame.

[0008] In the optional design of this application, the left and right sides of the forward engine bay are open.

[0009] In an optional embodiment of this application, the cockpit frame includes a main roll bar, a left lateral semi-roll bar, a right lateral semi-roll bar, a left auxiliary roll bar, a right auxiliary roll bar, a left cockpit bottom bar, and a right cockpit bottom bar. The left and right cockpit bottom bars are located on the left and right sides of the bottom of the cockpit frame, respectively. The main roll bar is located at the rear of the cockpit frame and its two ends are connected to the left and right cockpit bottom bars, respectively. The left and right lateral semi-roll bars are located on the left and right sides of the cockpit frame, respectively. The two ends of the left lateral semi-roll bar are connected to the top left side of the main roll bar and the left cockpit bottom bar, respectively. The two ends of the right lateral semi-roll bar are connected to the top right side of the main roll bar and the right cockpit bottom bar, respectively. The left and right auxiliary roll bars face each other and are connected in the middle. The two ends of the left auxiliary roll bar are connected to the top side of the left lateral semi-roll bar, and the two ends of the right auxiliary roll bar are connected to the top side of the right lateral semi-roll bar.

[0010] In the optional embodiment of this application, the cockpit frame also includes a rear reinforcing beam assembly located at the rear, with the rear reinforcing beam assembly consisting of a left rear vertical beam and a rear right vertical beam located on the left and right inner sides of the main anti-roll bar; the rear engine compartment frame includes a left rear anti-collision beam, a right rear anti-collision beam, a left rear support anti-roll bar, a right rear support anti-roll bar, and a rear intermediate beam; the two ends of the rear intermediate beam are respectively connected to the left rear vertical beam and the rear right vertical beam, forming the top opening of the rear engine compartment; the left rear anti-collision beam is located below the rear intermediate beam and its two ends are respectively connected to the left cockpit bottom bar and the rear intermediate beam; the right rear anti-collision beam is located below the rear intermediate beam and its two ends are respectively connected to the right cockpit bottom bar and the rear intermediate beam; the left rear support anti-roll bar and the right rear support anti-roll bar are located on the left and right sides of the rear engine compartment frame, respectively, and their two ends are respectively connected to the top side of the main anti-roll bar and the rear intermediate beam.

[0011] In the optional schemes of this application, the main anti-roll bar, the left transverse half anti-roll bar, the right transverse half anti-roll bar, the left auxiliary anti-roll bar, the right auxiliary anti-roll bar, the left rear anti-collision beam, the right rear anti-collision beam, and the rear middle beam are all bent pipe fittings.

[0012] In an optional embodiment of this application, the front nacelle frame also includes a front bumper beam, which is located at the very front of the front nacelle frame and bends backward at both ends.

[0013] The second aspect of this application provides an all-terrain off-road vehicle, which includes a front suspension, a rear suspension, front wheels, rear wheels, a front drive axle, a rear drive axle, an engine, a transmission, and the aforementioned roll cage; wherein the engine and transmission are arranged in the rear engine compartment, the front wheels and rear wheels are connected to the roll cage through the front suspension and the rear suspension respectively, the left and right front wheels are connected through the front drive axle, the left and right rear wheels are connected to the transmission through the rear drive axle, and the transmission is connected to the engine.

[0014] In the optional configurations of this application, the all-terrain off-road vehicle can be configured with any of the following power layouts: mid-engine rear-wheel drive, mid-engine four-wheel drive, rear-engine rear-wheel drive, and rear-engine four-wheel drive. When using a four-wheel drive configuration, the all-terrain off-road vehicle also includes a driveshaft that connects the front drive axle and the transmission. When using a mid-engine configuration, the engine is close to the cab frame, and the transmission is away from the cab frame. When using a rear-engine configuration, the engine is away from the cab frame, and the transmission is close to the cab frame.

[0015] Compared with the prior art, this application has at least the following beneficial effects:

[0016] The roll cage provided in this application comprises a front engine compartment frame, a driver's cab frame, and a rear engine compartment frame arranged sequentially in the front-rear direction. The driver's cab frame has a ball cage structure. The rear engine compartment frame and the driver's cab frame enclose a rear engine compartment, which extends in the front-rear direction and has sufficient volume to accommodate the engine and transmission of the all-terrain off-road vehicle. The relative front-rear positions of the engine and transmission within the rear engine compartment can also be adjusted. Thus, the all-terrain off-road vehicle can be configured with any of the following powertrain options: mid-engine rear-wheel drive, mid-engine four-wheel drive, rear-engine rear-wheel drive, or rear-engine four-wheel drive. Attached Figure Description

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

[0018] Figures 1a to 1d This is a schematic diagram of an all-terrain vehicle provided according to some embodiments of this application from a one-view perspective; wherein, Figure 1a This is a schematic diagram of a mid-engine, rear-wheel-drive layout. Figure 1b This is a schematic diagram of a mid-engine, four-wheel-drive layout. Figure 1c This is a schematic diagram of a rear-engine, rear-wheel-drive layout. Figure 1d A schematic diagram of a rear-engine, four-wheel-drive layout;

[0019] Figure 2 This is a schematic diagram of a roll cage provided according to one embodiment of this application;

[0020] Figure 3 for Figure 2 A schematic diagram of the roll cage from another perspective;

[0021] Figure 4 for Figure 2 A schematic diagram of the roll cage from another perspective;

[0022] Figure 5 for Figure 2 A schematic diagram of the roll cage from another perspective.

[0023] Figure Labels

[0024] 100. Roll cage;

[0025] 10. Cockpit frame; 11. Main roll bar; 12. Left transverse semi-roll bar; 13. Right transverse semi-roll bar; 14. Left auxiliary roll bar; 15. Right auxiliary roll bar; 16. Left cockpit bottom bar; 17. Right cockpit bottom bar; 18. Rear reinforcing beam assembly; 181. Left rear vertical beam; 182. Rear right vertical beam; 183. Bottom reinforcing crossbeam; 184. Cross beam; 19. Side reinforcing beam assembly; 101. Bottom frame reinforcing beam; 102. Connecting short crossbeam; R1. Cockpit

[0026] 20. Forward engine compartment frame; 21. Forward bumper beam; 22. Lower left front beam; 23. Lower right front beam; 24. Upper left front beam; 25. Upper right front beam; 26. Forward fork arm mounting beam; 27. Forward engine compartment main crossbeam; 28. Forward engine compartment left main longitudinal beam; 29. ​​Forward engine compartment right main longitudinal beam; R2. Forward engine compartment;

[0027] 30. Rear nacelle frame; 31. Left rear bumper beam; 32. Right rear bumper beam; 33. Left rear support roll bar; 34. Right rear support roll bar; 35. Rear center beam; 36. Rear side beam assembly; R3. Rear nacelle;

[0028] 410. Front suspension; 420. Rear suspension; 430. Front wheel; 440. Rear wheel; 450. Front drive axle; 460. Rear drive axle; 470. Engine; 480. Transmission; 490. Drive shaft;

[0029] 1000, All-terrain off-road vehicle. Detailed Implementation

[0030] To make the above and other features and advantages of this application clearer, the application is further described below with reference to the accompanying drawings. It should be understood that the specific embodiments given herein are for the purpose of explanation to those skilled in the art and are exemplary only, not restrictive.

[0031] In the description of this application, the terms "front-rear direction" and "longitudinal direction", "left-right direction" and "lateral direction", and "up-down direction" and "vertical direction" are all determined with reference to the vehicle's orientation. Specifically, the front-rear direction and longitudinal direction refer to the vehicle length direction, the left-right direction and lateral direction refer to the vehicle width direction, and the up-down direction and vertical direction refer to the vehicle height direction.

[0032] Figures 1a to 1d This is a schematic diagram of an all-terrain vehicle provided according to some embodiments of this application from a one-view perspective; wherein, Figure 1a This is a schematic diagram of a mid-engine, rear-wheel-drive layout. Figure 1b This is a schematic diagram of a mid-engine, four-wheel-drive layout. Figure 1c This is a schematic diagram of a rear-engine, rear-wheel-drive layout. Figure 1d This is a schematic diagram of a rear-engine, four-wheel-drive layout.

[0033] Please see Figures 1a to 1dThe all-terrain off-road vehicle 1000 includes a roll cage 100, a front suspension 410, a rear suspension 420, a front wheel 430, a rear wheel 440, a front drive axle 450, a rear drive axle 460, an engine 470, and a transmission 480.

[0034] Figure 2 This is a schematic diagram of a roll cage 100 provided according to one embodiment of this application. Figure 5 for Figure 2 A schematic diagram of the roll cage 100 from another perspective. Please refer to... Figure 2 and Figure 5 The roll cage 100 includes a driver's cab frame 10, a front engine compartment frame 20, and a rear engine compartment frame 30.

[0035] The cockpit frame 10 has a ball cage structure; the front engine compartment frame 20 is located on the front side of the cockpit frame 10; the rear engine compartment frame 30 is located on the rear side of the cockpit frame 10 and encloses the cockpit frame 10 to form the rear engine compartment R3. The rear engine compartment R3 extends in the front-rear direction and is configured to accommodate at least the engine 470 and transmission 480 of the all-terrain off-road vehicle.

[0036] In this embodiment, the roll cage is a structure composed of multiple tubular components. The cab frame 10 is a ball cage structure formed by the splicing of tubular components. The interior of the ball cage structure is the cab R1. The ball cage structure can be understood as having tubular protection arranged in front, rear, left, right, top, and bottom of the cab R1, which can ensure the safety of the occupants in the cab.

[0037] The front engine compartment frame 20, the driver's cab frame 10, and the rear engine compartment frame 30 are arranged sequentially in a front-rear direction. The front engine compartment frame 20 and the driver's cab frame 10 enclose the front engine compartment R1, which is used to house the steering device and other components in specific applications. The rear engine compartment frame 30 and the driver's cab frame 10 form the rear engine compartment R3, which is used to install the engine 470 and transmission 480 of the aforementioned all-terrain off-road vehicle.

[0038] The engine 470 and transmission 480 are located in the rear engine compartment R3. The front wheels 430 and rear wheels 440 are connected to the roll cage 100 via the front suspension 410 and rear suspension 420, respectively. The front wheels 430 on both sides are connected via the front drive axle 450, and the rear wheels 440 on both sides are connected to the transmission 480 via the rear drive axle 460. The transmission 480 is connected to the engine 470.

[0039] In practical applications, the all-terrain off-road vehicle 1000 is a four-wheeled vehicle. The front wheels 430 include the left front wheel and the right front wheel located on the left and right sides of the vehicle, and the rear wheels 440 include the left rear wheel and the right rear wheel located on the left and right sides of the vehicle.

[0040] The front suspension 410 connects the front wheels 430 on both sides to the front engine compartment frame 20 of the roll cage 100, and the rear suspension 420 connects the rear wheels 440 on both sides to the rear bottom of the driver's compartment frame 10 of the roll cage 100. The engine 470 outputs power to the transmission 480, which then transmits the power to the rear drive axle 460. The rear drive axle 460 transmits power to the rear wheels 440 on both sides, and the front drive axle 450 transmits power to the front wheels 430 on both sides.

[0041] In this embodiment, the rear engine compartment R3 extends in the front-rear direction and has sufficient volume to accommodate the engine 470 and the transmission 480, and can adjust the relative front-rear positions of the engine 470 and the transmission 480 in the rear engine compartment R3.

[0042] Thus, the all-terrain vehicle can be configured with any of the following power layouts: mid-engine rear-wheel drive, mid-engine four-wheel drive, rear-engine rear-wheel drive, and rear-engine four-wheel drive.

[0043] In the four-wheel drive configuration, this all-terrain vehicle also includes a driveshaft 490, which connects the front drive axle 450 and the transmission 480. Thus, the power output from the engine 470 can be transmitted to the rear wheels 440 via the transmission 480 and the rear drive axle 460, and also to the front wheels 430 via the driveshaft 490 and the front drive axle 450. Furthermore, the transmission 480 has a transfer case to achieve four-wheel drive. It should be noted that the four-wheel drive configurations mentioned here include the aforementioned mid-engine four-wheel drive and rear-engine four-wheel drive.

[0044] In the mid-engine configuration, the engine 470 is closer to the cockpit frame 10, while the transmission 480 is farther from the cockpit frame 10. In the rear-engine configuration, the engine 470 is farther from the cockpit frame 10, while the transmission is closer to the cockpit frame. In other words, the difference between the mid-engine and rear-engine layouts lies in the mounting position of the engine 470. In the mid-engine layout, the engine 470 is closer to the cockpit frame 10, i.e., relatively forward; in the rear-engine layout, the engine 470 is farther from the cockpit frame 10, i.e., relatively rearward.

[0045] As can be seen, the all-terrain off-road vehicle 1000 equipped with the aforementioned roll cage 100 has a rear engine compartment R3 space sufficient to accommodate the engine 470 and transmission 480, and allows the two to adjust their relative front and rear positions to achieve any of the following power layout schemes: mid-engine rear-wheel drive, mid-engine four-wheel drive, rear-engine rear-wheel drive, and rear-engine four-wheel drive, thus exhibiting good versatility.

[0046] In a further alternative, the width of the aft engine bay frame 30 is smaller than the rear end width of the cockpit frame 10. Please refer to... Figures 1a to 1bThe left and right sides of the rear engine compartment frame 30 and the rear end of the cockpit frame 10 form mounting spaces for arranging the rear suspension 420 in the mounting spaces on both sides. In the illustrated embodiment, the rear engine compartment R3 has approximately the same dimensions in the longitudinal direction, so that there will be no interference when changing the longitudinal relative positions of the engine 470 and the transmission 480.

[0047] Furthermore, the top of the rear engine compartment R3 is open, which facilitates maintenance personnel to perform maintenance on the engine 470 and transmission 480 inside.

[0048] In a further alternative embodiment, the rear end width of the forward engine compartment frame 20 is greater than the front end width. In other words, the forward engine compartment frame 20 has a shape that is wider at the rear end and narrower at the front end. In the illustrated embodiment, the top view cross-section of the forward engine compartment frame 20 is approximately trapezoidal.

[0049] Furthermore, the left and right sides of the forward engine compartment frame 20 are open. This arrangement makes it easier to arrange the front suspension 410 on the left and right sides of the forward engine compartment frame 20. The front suspension 410 compresses the space on the left and right sides of the forward engine compartment R2, making the forward engine compartment frame 20 adopt a shape that is narrow at the front and wide at the rear.

[0050] In practical applications, the front suspension 410 adopts a double wishbone structure, and the rear suspension 420 adopts a trailing arm structure. Of course, it is not limited to these. The required suspension structure can be selected according to the needs, and the structure of the vehicle frame needs to be adjusted accordingly to adapt.

[0051] As can be seen from the above, the roll cage 100 adopts a design with a wide middle section and a narrow front and rear ends, which ensures the vehicle's passability while ensuring the passenger space of the cab R1.

[0052] Figure 3 for Figure 2 A schematic diagram of the roll cage 100 from another perspective. Please refer to... Figure 3 In some optional embodiments, the cockpit frame 10 includes a main roll bar 11, a left transverse half roll bar 12, a right transverse half roll bar 13, a left auxiliary roll bar 14, a right auxiliary roll bar 15, a left cockpit bottom bar 16, and a right cockpit bottom bar 17.

[0053] The left cockpit bottom bar 16 and the right cockpit bottom bar 17 are located on the left and right sides of the bottom of the cockpit frame 10, respectively. The main anti-roll bar 11 is located on the rear side of the cockpit frame 10 and its two ends are connected to the left cockpit bottom bar 16 and the right cockpit bottom bar 17, respectively.

[0054] The left transverse half roll bar 12 and the right transverse half roll bar 13 are located on the left and right sides of the cockpit frame 10, respectively. The two ends of the left transverse half roll bar 12 are connected to the top left side of the main roll bar 11 and the bottom left cockpit frame 16, respectively. The two ends of the right transverse half roll bar 13 are connected to the top right side of the main roll bar 11 and the bottom right cockpit frame 17, respectively.

[0055] The left auxiliary anti-roll bar 14 and the right auxiliary anti-roll bar 15 face each other and are connected in the middle. The two ends of the left auxiliary anti-roll bar 14 are connected to the top side of the left transverse half anti-roll bar 12, and the two ends of the right auxiliary anti-roll bar 15 are connected to the top side of the right transverse half anti-roll bar 13.

[0056] In this embodiment, the cockpit frame 10 is a ball cage structure formed by at least the main anti-roll bar 11, the left transverse half anti-roll bar 12, the right transverse half anti-roll bar 13, the left auxiliary anti-roll bar 14, the right auxiliary anti-roll bar 15, the left cockpit bottom bar 16, and the right cockpit bottom bar 17.

[0057] In this embodiment, the main roll bar 11, the left lateral half roll bar 12, the right lateral half roll bar 13, the left auxiliary roll bar 14, the right auxiliary roll bar 15, the left cockpit bottom bar 16, and the right cockpit bottom bar 17 are all arched, which is more conducive to impact resistance.

[0058] The left transverse half roll bar 12 and the right transverse half roll bar 13 are located on the left and right sides of the cockpit frame 10, respectively. The main roll bar 11 is located on the rear side of the cockpit frame 10. The left cockpit bottom bar 16 and the right cockpit bottom bar 17 are located at the bottom of the cockpit frame 10. The left auxiliary roll bar 14 and the right auxiliary roll bar 15 are connected to the top side of the left transverse half roll bar 12 and the top side of the right transverse half roll bar 13, respectively.

[0059] In some alternative embodiments, the forward engine compartment frame 20 includes at least the lower left front beam 22, the lower right front beam 23, the upper left front beam 24, the upper right front beam 25, the forward engine compartment main crossbeam 27, the forward engine compartment left main longitudinal beam 28, and the forward engine compartment right main longitudinal beam 29.

[0060] Among them, the lower left front beam 22, the upper left front beam 24 and the left main longitudinal beam 28 of the forward engine compartment are connected in sequence to form a left front arched beam structure extending in the front-rear direction. The lower right front beam 23, the upper right front beam 25 and the right main longitudinal beam 29 of the forward engine compartment are connected in sequence to form a right front arched beam structure extending in the front-rear direction, and intersect with the forward engine compartment main cross beam 27.

[0061] The ends of the lower left front beam 22 and the lower right front beam 23 are respectively connected to the left cockpit bottom bar 16 and the right cockpit bottom bar 17. The two ends of the front engine compartment main cross beam 27 are respectively connected to the left transverse half anti-roll bar 12 and the right transverse half anti-roll bar 13. The ends of the left main longitudinal beam 28 and the right main longitudinal beam 29 of the front engine compartment can be connected to the left auxiliary anti-roll bar 14 and the right auxiliary anti-roll bar 15 through pipe fittings.

[0062] The forward engine compartment frame 20 also includes a fork arm mounting beam 26, which is located below the forward engine compartment main crossbeam 27 and extends rearward from the upper left front beam 24 and the upper right front beam 25. In specific applications, the fork arm mounting beam 26 may be provided with upper fork arm mounting points, and the lower left front beam 22 and the lower right front beam 23 may be provided with lower fork arm mounting points.

[0063] In the illustrated embodiment, the forward engine compartment main crossbeam 27 adopts a structure of three sections of tubular components spliced ​​together sequentially, and the fork-arm mounting beam 26 is I-shaped. Of course, the forward engine compartment frame 20 also includes other beams, which will not be described in detail here.

[0064] In some alternative embodiments, the front nacelle frame 20 also includes a front bumper beam 21, which is located at the foremost end of the front nacelle frame 20 and is bent rearward at both ends.

[0065] In this embodiment, the width of the aforementioned front engine compartment frame 20 refers to the length of the front bumper beam 21. The length of the front bumper beam 21 should not be too long and should be curved backward, which is more conducive to increasing the vehicle's approach angle. In specific applications, the front bumper beam 21 is located at the junction of the lower left front beam 22 and the upper left front beam 24, and at the junction of the lower right front beam 23 and the upper right front beam 25. It does not protrude forward much, thus making it more conducive to ensuring a larger approach angle.

[0066] Figure 4 for Figure 2 A schematic diagram of the roll cage 100 from another perspective. Please refer to... Figure 4 In some optional embodiments, the cockpit frame 10 also includes a rear reinforcing beam assembly 18 located at the rear, the rear reinforcing beam assembly 18 being the left rear vertical beam 181 and the rear right vertical beam 182 located on the left and right inner sides of the main anti-roll bar 11.

[0067] The rear cabin frame 30 includes a left rear anti-collision beam 31, a right rear anti-collision beam 32, a left rear support roll bar 33, a right rear support roll bar 34, and a rear center beam 35.

[0068] The two ends of the rear center beam 35 are connected to the left rear vertical beam 181 and the rear right vertical beam 182 respectively, forming the top opening of the rear cabin R3. The left rear anti-collision beam 31 is located below the rear center beam 35 and its two ends are connected to the left cockpit bottom bar 16 and the rear center beam 35 respectively. The right rear anti-collision beam 32 is located below the rear center beam 35 and its two ends are connected to the right cockpit bottom bar 17 and the rear center beam 35 respectively.

[0069] The left rear support anti-roll bar 33 and the right rear support anti-roll bar 34 are located on the left and right sides of the rear engine compartment frame 30, respectively, and both ends are connected to the top side of the main anti-roll bar 11 and the rear intermediate beam 35.

[0070] In this embodiment, the rear side of the cockpit frame 10 is also provided with a rear reinforcing beam assembly 18 to ensure the structural strength of the rear side of the cockpit frame 10. The left rear vertical beam 181 and the rear right vertical beam 182 are located inside the arched main roll bar 11. Therefore, the opening width formed by the rear intermediate beam 35 extending rearward from the left rear vertical beam 181 and the rear right vertical beam 182 is smaller than the width of the cockpit frame 10.

[0071] In practical applications, the upper opening of the rear cabin frame 30 is large and the lower opening is narrow, that is, the distance between the left rear anti-collision beam 31 and the right rear anti-collision beam 32 is smaller than the width of the upper opening.

[0072] In this embodiment, the left rear bumper beam 31 and the right rear bumper beam 32 have the same shape, both having a longitudinal beam segment and a bumper beam segment that extends obliquely upward from the end of the longitudinal beam segment and connects to the rear intermediate beam 35. The bumper beam segments on both sides are located at the rearmost position, serving as both components of the rear engine compartment frame 30 and providing a bumper function. Furthermore, the spacing between the bumper beam segments on both rear sides is small, and the acute angle formed between them and the longitudinal beam segment is greater than 80°. In other words, the bumper beam segments are basically perpendicular to the ground, which is more conducive to increasing the vehicle's departure angle.

[0073] It should be noted that the vertical beam segment extends into the cockpit frame 10 and is directly connected to the arched cockpit bottom bar to form a bottom closed ring on the left and right sides of the bottom. The bottom closed ring on both sides is provided with a bottom frame reinforcing beam 101. The bottom frame reinforcing beam 101 on one side connects the cockpit bottom bar on the same side to the vertical beam segment of the rear anti-collision beam.

[0074] The bottom of the roll cage 100 is also provided with multiple connecting short crossbeams 102, which are located between the straight longitudinal beam segments in the rear anti-collision beams on both sides and are spaced apart.

[0075] In practical applications, the roll cage 100, when matched with suitable wheels and suspension, ensures sufficient ground clearance and allows for an approach angle of 40° to 50° and a departure angle of 45° to 55°, greatly ensuring excellent passability for vehicles using the roll cage 100. Furthermore, the roll cage 100 enables suspension with a travel range exceeding 500mm to further guarantee vehicle passability.

[0076] The left rear support roll bar 33 and the right rear support roll bar 34 can strengthen the connection between the rear engine compartment frame 30 and the cockpit frame 10, and further improve the anti-roll performance.

[0077] In some optional embodiments, the rear reinforcing beam assembly 18 further includes a bottom reinforcing crossbeam 183, and the bottom reinforcing crossbeam 183, the left rear vertical beam 181, the rear right vertical beam 182 and the top side of the main anti-roll bar 11 form a rectangular ring structure, and the rectangular ring structure is provided with cross beams 184 to strengthen the connection.

[0078] In practical applications, the cockpit frame 10 also includes side reinforcing beam assemblies 19 located on the left and right sides. Each side reinforcing beam assembly 19 is located on the cockpit frame 10 and connects the main roll bar 11 with the cockpit floor bar and the transverse semi-roll bar on the same side. The rear cabin frame 30 also includes rear side beam assemblies 36 located on its left and right sides. The rear side beam assemblies 36 are located between the longitudinal section of the rear bumper beam and the rear intermediate beam 35, serving to strengthen the connection.

[0079] It should be noted that both the side reinforcement beam group 19 and the rear side beam group 36 include multiple beams, and the appropriate number and arrangement position can be selected according to the requirements. Each beam will not be described in detail here.

[0080] In a further optional embodiment, the main anti-roll bar 11, the left transverse half anti-roll bar 12, the right transverse half anti-roll bar 13, the left auxiliary anti-roll bar 14, the right auxiliary anti-roll bar 15, the left rear anti-collision beam 31, the right rear anti-collision beam 32, and the rear middle beam 35 are all bent tubular components.

[0081] In this embodiment, using bent tubing reduces the number of tubular beams used, reduces the number of welding operations at the joints of multiple tubular beams in the vehicle, improves the overall vehicle strength, reduces the difficulty of welding during frame prototyping, simplifies prototyping tooling and fixtures, and reduces overall vehicle cost and time cost. In other words, bent tubing formed by bending process replaces the irregularly shaped tubing formed by existing welding processes.

[0082] Secondly, while meeting the requirements of the race regulations for the roll cage structure (1 main roll bar, 2 lateral half roll bars, 1 lateral component (in this case, the left auxiliary roll bar 14 and the right auxiliary roll bar 15 are spliced ​​together), 2 rear support roll bars), the aesthetic appearance of the frame is also taken into account.

[0083] In practical applications, the aforementioned bars, pipes, and beams can all be made of steel pipes, such as round steel pipes with a diameter of 35mm to 45mm. Of course, the aforementioned bent pipe fittings are not limited to these bars and beams and can be adjusted according to requirements.

[0084] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application.

Claims

1. A roll cage, characterized in that, include: The cockpit frame (10) is a ball cage structure; The forward engine bay frame (20) is located on the front side of the cockpit frame (10); as well as The rear engine compartment frame (30) is located on the rear side of the driver's cab frame (10) and encloses the driver's cab frame (10) to form a rear engine compartment (R3). The rear engine compartment (R3) extends in the front-rear direction and is configured to accommodate at least the engine (470) and transmission (480) of the all-terrain vehicle.

2. The roll cage according to claim 1, characterized in that, The width of the rear cabin frame (30) is smaller than the rear end width of the cockpit frame (10).

3. The roll cage according to claim 1, characterized in that, The rear end width of the front engine bay frame (20) is greater than the front end width of the front engine bay frame (20).

4. The roll cage according to claim 1, characterized in that, The left and right sides of the front engine bay frame (20) are open.

5. The roll cage according to any one of claims 1 to 4, characterized in that, The cockpit frame (10) includes a main roll bar (11), a left transverse half roll bar (12), a right transverse half roll bar (13), a left auxiliary roll bar (14), a right auxiliary roll bar (15), a left cockpit bottom bar (16), and a right cockpit bottom bar (17). The left cockpit bottom bar (16) and the right cockpit bottom bar (17) are located on the left and right sides of the bottom of the cockpit frame (10), respectively. The main anti-roll bar (11) is located on the rear side of the cockpit frame (10) and its two ends are connected to the left cockpit bottom bar (16) and the right cockpit bottom bar (17), respectively. The left transverse half roll bar (12) and the right transverse half roll bar (13) are located on the left and right sides of the cockpit frame (10), respectively. The two ends of the left transverse half roll bar (12) are connected to the top left side of the main roll bar (11) and the left cockpit bottom bar (16), respectively. The two ends of the right transverse half roll bar (13) are connected to the top right side of the main roll bar (11) and the right cockpit bottom bar (17), respectively. The left auxiliary anti-roll bar (14) and the right auxiliary anti-roll bar (15) face each other and are connected in the middle. The two ends of the left auxiliary anti-roll bar (14) are connected to the top side of the left transverse half anti-roll bar (12), and the two ends of the right auxiliary anti-roll bar (15) are connected to the top side of the right transverse half anti-roll bar (13).

6. The roll cage according to claim 5, characterized in that, The cockpit frame (10) also includes a rear reinforcing beam assembly (18) located at the rear, which is located on the left rear vertical beam (181) and the rear right vertical beam (182) on the left and right inner sides of the main anti-roll bar (11). The rear cabin frame (30) includes a left rear anti-collision beam (31), a right rear anti-collision beam (32), a left rear support roll bar (33), a right rear support roll bar (34), and a rear center beam (35); The two ends of the rear middle beam (35) are respectively connected to the left rear vertical beam (181) and the rear right vertical beam (182) and form the top opening of the rear cabin (R3). The left rear anti-collision beam (31) is located below the rear middle beam (35) and its two ends are respectively connected to the left cockpit bottom block (16) and the rear middle beam (35). The right rear anti-collision beam (32) is located below the rear middle beam (35) and its two ends are respectively connected to the right cockpit bottom block (17) and the rear middle beam (35). The left rear support anti-roll bar (33) and the right rear support anti-roll bar (34) are located on the left and right sides of the rear engine compartment frame (30), respectively, and both ends are connected to the top side of the main anti-roll bar (11) and the rear intermediate beam (35).

7. The roll cage according to claim 6, characterized in that, The main anti-roll bar (11), the left transverse half anti-roll bar (12), the right transverse half anti-roll bar (13), the left auxiliary anti-roll bar (14), the right auxiliary anti-roll bar (15), the left rear anti-collision beam (31), the right rear anti-collision beam (32), and the rear middle beam (35) are all bent tubular components.

8. The roll cage according to claim 5, characterized in that, The front cabin frame (20) also includes a front bumper beam (21), which is located at the frontmost end of the front cabin frame (20) and bends backward at both ends.

9. An all-terrain off-road vehicle, characterized in that, The all-terrain vehicle includes a front suspension (410), a rear suspension (420), a front wheel (430), a rear wheel (440), a front drive axle (450), a rear drive axle (460), an engine (470), a transmission (480), and a roll cage (100) according to any one of claims 1 to 8. The engine (470) and the transmission (480) are located in the rear engine compartment (R3). The front wheels (430) and the rear wheels (440) are connected to the roll cage (100) via the front suspension (410) and the rear suspension (420), respectively. The front wheels (430) on the left and right sides are connected via the front drive axle (450), and the rear wheels (440) on the left and right sides are connected to the transmission (480) via the rear drive axle (460). The transmission (480) is connected to the engine (470).

10. The all-terrain off-road vehicle according to claim 9, characterized in that, The all-terrain off-road vehicle can be configured with any of the following power layouts: mid-engine rear-wheel drive, mid-engine four-wheel drive, rear-engine rear-wheel drive, and rear-engine four-wheel drive. When using a four-wheel drive system, the all-terrain vehicle also includes a driveshaft (490) that connects the front drive axle (450) to the transmission (480); In the mid-mounted configuration, the engine (470) is close to the cockpit frame (10), and the transmission (480) is away from the cockpit frame (10); in the rear-mounted configuration, the engine (470) is away from the cockpit frame (10), and the transmission (480) is close to the cockpit frame (10).

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