Main body frame of all-terrain vehicle

Abstract

The utility model relates to the technical field of all-terrain vehicles, in particular to a main body frame of an all-terrain vehicle, which comprises a vehicle body support, the tail of the vehicle body support is connected with a rear goods shelf, the rear goods shelf comprises a first support and a second support, and the first support and the second support define a closed polygonal structure. Two third supports are fixedly connected between the first support and the second support, the first support comprises a first transverse rod section and two first supporting rod sections arranged at the two ends of the first transverse rod section, the first supporting rod sections are bent sections, and the second support comprises a second transverse rod section arranged at the two ends of the second transverse rod section. A second supporting rod section and a third supporting rod section are sequentially arranged at the two ends of the second transverse rod section respectively; the vehicle body support is connected with an engine buffering device and connected with an engine through the engine buffering device. The rear storage rack with a novel structure is mounted on the main body frame, and the engine is elastically supported, so that the damage of rigid load and rigid impact to the engine is effectively avoided.

Description

Technical Field

[0001] This utility model relates to the field of all-terrain vehicle technology, specifically to a main frame for an all-terrain vehicle. Background Technology

[0002] All-terrain vehicles (ATVs) are vehicles capable of traversing any terrain, moving freely on surfaces where ordinary vehicles struggle. Traditionally, ATVs were designed primarily for carrying people, facilitating rapid movement in snow-covered or rugged areas. Due to their lightweight construction, powerful engines, and wide tracks and skis, they can maneuver nimbly on soft snow or ice, making them essential tools for winter adventures, ski resort transportation, and travel in remote areas.

[0003] However, traditional all-terrain vehicles (ATVs) have significant limitations in cargo capacity, mainly due to the following reasons: First, limited cargo capacity: Traditional ATVs are designed with speed and agility in mind rather than load-bearing capacity. Their compact frame structure lacks dedicated storage boxes or racks for cargo, making them unsuitable for large-scale cargo transportation. Second, stability issues: ATVs need to maintain balance while driving, especially on rough snow or ice. When loaded, the vehicle's center of gravity shifts, increasing the risk of rollover or loss of control. Third, limited purpose: Traditional ATVs are primarily designed for passenger transport, and therefore cargo-carrying functionality was not considered in their design. This makes them inadequate for scenarios requiring the transport of supplies, such as polar expeditions, resupplying remote areas, or winter rescue missions.

[0004] In addition, the engine of an all-terrain vehicle is usually connected to the vehicle frame in a rigid manner. Specifically, the engine and the vehicle frame are directly connected by a fixing device without any elastic elements or other buffer mechanisms in between. The advantage of this connection method is that it is simple in structure and easy to install. However, during driving, there is no effective buffer between the engine and the vehicle frame, which has an adverse effect on the engine and the whole vehicle.

[0005] The impact of rigid connections on the engine is mainly in three aspects: First, vibration and shock: All-terrain vehicles typically travel on complex terrains, such as sand, muddy roads, or rugged mountain roads. Rigid connections cause the engine to directly bear the impact and vibration from the ground. These impact forces are transmitted to internal engine components, such as the crankshaft, connecting rods, and cylinder block, which may lead to fatigue damage to these components. Second, resonance: Due to the lack of buffering, the engine may resonate with the vehicle frame during operation. Resonance will aggravate the engine's vibration amplitude, further affecting the engine's performance and lifespan. Third, high installation precision requirements: Rigid connections require high precision in the installation of the engine and the vehicle frame. If the installation position is inaccurate, it may lead to imbalance during engine operation, thereby affecting its performance and lifespan.

[0006] Therefore, in order to solve the problems caused by rigid connections, the engine of an all-terrain vehicle needs to be installed with a buffer design. Utility Model Content

[0007] The technical problem to be solved by this utility model is to overcome the defects of the prior art and provide a main frame for an all-terrain vehicle.

[0008] To solve the above-mentioned technical problems, this utility model provides the following technical solution:

[0009] A main frame for an all-terrain vehicle includes a vehicle body support frame. A rear rack is connected to the rear of the vehicle body support frame. The rear rack includes a first support frame and a second support frame. The first support frame and the second support frame form a closed polygonal structure. Two third support frames are fixedly connected between the first support frame and the second support frame. The first support frame includes a first crossbar segment and two first support rod segments disposed at both ends of the first crossbar segment. The first support rod segments are bent segments. The second support frame includes a second crossbar segment. The two ends of the second crossbar segment are respectively provided with second support rod segments and third support rod segments. The third support rod segments are bent segments.

[0010] The first crossbar segment, the first support segment, and the third bracket are arranged on the same horizontal plane, and the third support segment is inclined upward relative to the first support segment and the third bracket;

[0011] A support plate is fixedly connected between the first support rod segment, the third bracket, and the third support rod segment. The support plate has several through holes with different structures.

[0012] The second support segment is inclined downward relative to the third support, the height of the second crossbar segment is lower than that of the first crossbar segment, and the second crossbar segment is parallel to the first crossbar segment.

[0013] An engine buffer device is connected to the vehicle body frame, and the engine is connected through the engine buffer device.

[0014] The two ends of the second crossbar segment are respectively connected to the fourth bracket, and the two fourth brackets are respectively connected to the two third brackets. The fourth brackets are set at an angle relative to the second crossbar segment.

[0015] A first U-shaped plate is fixedly connected to the second crossbar segment, and a second U-shaped plate is fixedly connected between the second crossbar segment and the fourth bracket. Both the first U-shaped plate and the second U-shaped plate have connection holes.

[0016] The bottom of each of the two third brackets is fixedly connected to a mounting plate, which has mounting holes and elongated holes.

[0017] The lower part of the second crossbar segment is fixedly connected to a first mounting plate, which has mounting holes for fixing to the vehicle body bracket with bolts.

[0018] The engine buffer device includes four mounting seats. The bottom of the mounting seats is fixedly connected to the vehicle body bracket. A connecting shaft is connected between two mounting seats. Two second mounting plates are fixedly connected to the connecting shaft. The two second mounting plates are respectively fixedly connected to two sides of the engine by bolts. The second mounting plates have a V-shaped structure and are sheet metal parts.

[0019] The other two mounting seats are connected to a first assembly shaft, which passes through the mounting hole on the engine, and the two mounting seats are located at both ends of the engine mounting hole.

[0020] The bottom of the second mounting plate's V-shaped structure is provided with a buffer opening;

[0021] The second mounting plate has bending plates at the lower part of the two sides of the V-shaped structure, and the bending plates are attached to the lower part of the engine.

[0022] The mounting base includes a base body, and a through hole is provided in the middle of the base body;

[0023] Two mounting bases near the connecting shaft have a second assembly shaft connected through their through holes. The second assembly shaft passes through the connecting shaft and is a long bolt rod. One end of the second assembly shaft is provided with an external thread and connected to a nut. The nut is locked onto the surface of the mounting base.

[0024] The first assembly shaft is a long bolt rod with an external thread at one end and a nut connected to it. The nut is locked onto the surface of the mounting base.

[0025] The mounting base has fastening bolts at both ends of its bottom, which are used to fix the base to the base plate of the vehicle body bracket.

[0026] The beneficial effects achieved by this utility model are:

[0027] This utility model features a novel rear rack mounted on its main frame. This rack employs a unique structural design that optimizes the overall weight distribution while ensuring stable load-bearing capacity. It achieves lightweight design while maintaining load-bearing strength, effectively avoiding excessive weight load on the all-terrain vehicle. Specifically, the rack utilizes an integrated main frame structure as its skeleton, with a support plate featuring several through holes serving as a platform. This design ensures safety while maintaining a simple and aesthetically pleasing structure, significantly enhancing the practicality and ease of use of the all-terrain vehicle.

[0028] This invention achieves elastic support for the engine by incorporating a second mounting plate and mounting base, effectively preventing damage to the engine from rigid loads and impacts. Specifically, the engine and mounting base employ an elastic connection structure, which absorbs and buffers vibrations and impacts during engine operation, thereby significantly reducing mechanical stress and extending the engine's service life. Furthermore, this elastic support structure effectively isolates vibration transmission between the engine and the main frame, improving the overall NVH (noise, vibration, and harshness) performance of the vehicle and further enhancing driving comfort.

[0029] Through this design, this utility model not only solves the potential damage to the engine caused by the traditional rigid support method, but also provides a reliable guarantee for the stable operation of the engine. At the same time, it optimizes the layout of the vehicle's power system and lays a technical foundation for the comprehensive improvement of vehicle performance. Attached Figure Description

[0030] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0031] Figure 1 This is a schematic diagram of the structure of this utility model. Figure 1 ;

[0032] Figure 2 This is a structural schematic diagram of the rear shelf of this utility model (top view).

[0033] Figure 3 This is a structural schematic diagram of the rear shelf of this utility model (view from below).

[0034] Figure 4 This is a structural schematic diagram of the rear shelf of this utility model (front view).

[0035] Figure 5 This is a schematic diagram of the structure of this utility model. Figure 2 (Removing part of the structure);

[0036] Figure 6 yes Figure 5 Enlarged view of the structure at point A in the middle;

[0037] Figure 7 This is a schematic diagram of the engine buffer device of this utility model (view from below).

[0038] In the diagram: 1. Vehicle body bracket; 12. First crossbar segment; 13. Support plate; 14. First support rod segment; 15. Third bracket; 16. Third support rod segment; 17. Second support rod segment; 18. Fourth bracket; 19. Second crossbar segment; 110. First U-shaped plate; 111. Second U-shaped plate; 112. Through hole; 113. Hanging plate; 114. First mounting plate; 115. Mounting hole; 21. Second assembly shaft; 22. Engine; 23. Mounting seat; 24. Second mounting plate; 25. Fastening bolt; 26. Connecting shaft; 27. First assembly shaft; 28. Buffer opening; 29. ​​Bending plate; 210. Base plate. Detailed Implementation

[0039] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0040] Example:

[0041] like Figures 1-7 As shown, the main frame of an all-terrain vehicle includes a vehicle body support 1, which is a main frame structure composed of several rods, forming the main structure of the all-terrain vehicle and providing support for the installation of various mechanisms of the all-terrain vehicle.

[0042] The rear of the vehicle body support 1 is connected to a rear rack, which includes a first support and a second support. The first and second supports form a closed polygonal structure, and the first and second supports can be fixedly connected by welding. Two third supports 15 are fixedly connected between the first and second supports, serving as two intermediate support structures.

[0043] The first support includes a first crossbar segment 12 and two first support segments 14 disposed at both ends of the first crossbar segment 12. The first support segments 14 are bent segments. The second support includes a second crossbar segment 19. The two ends of the second crossbar segment 19 are respectively provided with a second support segment 17 and a third support segment 16, which are bent segments.

[0044] It should be noted that both the first and second supports are integral structures. To facilitate the explanation of the specific structure, they are labeled and described in sections in the instruction manual.

[0045] The first crossbar segment 12, the first support segment 14 and the third bracket 15 are arranged on the same horizontal plane. The third support segment 16 is inclined upward relative to the first support segment 14 and the third bracket 15. The third support segment 16 can serve as a handrail structure for passengers to easily grip.

[0046] A support plate 13 is fixedly connected between the first support rod segment 14, the third bracket 15, and the third support rod segment 16. The support plate 13 has several through holes 112. The structures of the several through holes 112 are different. The several through holes 112 can not only serve as reserved installation holes for connection with the box or other structures to be modified later, but also reduce the weight of the support plate 13, thereby reducing the weight of the whole vehicle.

[0047] The first support segment 14, the third bracket 15, and the third support segment 16 form a closed frame, and the support plate 13 is inside the closed frame. The above structure forms a loading platform.

[0048] The second support segment 17 is inclined downward relative to the third bracket 15, the height of the second crossbar segment 19 is lower than that of the first crossbar segment 12, and the second crossbar segment 19 is parallel to the first crossbar segment 12, thereby facilitating the placement of items.

[0049] The second crossbar segment 19 has four fourth supports 18 connected to both ends. The two fourth supports 18 are connected to two third supports 15 respectively. The fourth supports 18 are inclined relative to the second crossbar segment 19. The fourth supports 18 can provide reinforced support for the second crossbar segment 19 and the third supports 15.

[0050] A first U-shaped plate 110 is fixedly connected to the second crossbar segment 19, and a second U-shaped plate 111 is fixedly connected between the second crossbar segment 19 and the fourth bracket 18. Both the first U-shaped plate 110 and the second U-shaped plate 111 are provided with connecting holes, which can be threaded holes. The horizontal surfaces of the first U-shaped plate 110 and the second U-shaped plate 111 are at the top and can be used to support the backrest, providing back support for passengers of the all-terrain vehicle. The backrest and the first U-shaped plate 110 and the second U-shaped plate 111 are all connected by screws, and the connecting holes are used to connect the screws.

[0051] Both of the third brackets 15 are fixedly connected to a mounting plate 113 at their bottom. The mounting plate 113 has mounting holes and elongated holes. The mounting plate 113 is connected to the plastic shell and other structures of the all-terrain vehicle through the mounting holes and elongated holes.

[0052] The lower part of the second crossbar segment 19 is fixedly connected to a first mounting plate 114, which has mounting holes 115 for bolting to the vehicle body bracket 1.

[0053] The structure of this utility model makes the two sides of the entire rear shelf a loading platform, and the middle is set with a downward concave shape, which also makes it easy to place items, thereby increasing the loading space.

[0054] An engine buffer device is connected to the vehicle body support 1, and the engine 22 is connected through the engine buffer device.

[0055] The engine buffer device includes four mounting seats 23. The bottom of the mounting seats 23 is fixedly connected to the vehicle body bracket 1. A connecting shaft 26 is connected between two mounting seats 23. Two second mounting plates 24 are welded on the connecting shaft 26. The two second mounting plates 24 are fixedly connected to the two sides of the engine 22 by bolts. The second mounting plates 24 have a V-shaped structure and are sheet metal parts.

[0056] The aforementioned elastic connection structure can absorb and buffer vibration and impact during engine 22 operation, thereby significantly reducing the mechanical stress of engine 22 and extending its service life.

[0057] The other two mounting seats 23 are connected to a first mounting shaft 27, which passes through the mounting hole on the engine 22. The two mounting seats 23 are located at both ends of the mounting hole on the engine 22.

[0058] Four mounting brackets 23 are respectively distributed at the four corners of the bottom of the engine 22 to support the engine 22.

[0059] The bottom of the V-shaped structure of the second mounting plate 24 is provided with a buffer opening 28, and the gap at the buffer opening 28 can buffer the rigid impact generated by the vibration of the engine 22. The lower part of the two edges of the V-shaped structure of the second mounting plate 24 is provided with a bent plate 29, which fits against the lower part of the engine 22 to further support and protect the engine 22.

[0060] The mounting base 23 includes a base body, and a through hole is provided in the middle of the base body.

[0061] Two mounting seats 23 near the connecting shaft 26 have a second mounting shaft 21 connected through their through holes. The second mounting shaft 21 passes through the connecting shaft 26 and is a long bolt rod. One end of the second mounting shaft 21 is provided with an external thread and connected to a nut. The nut is locked onto the surface of the mounting seat 23. Specifically, the second mounting shaft 21 passes through the through hole of one mounting seat 23, the middle hole of the connecting shaft 26 and the through hole of the other mounting seat 23 in sequence, and is then screwed onto the nut.

[0062] The first assembly shaft 27 is a long bolt rod with an external thread at one end, which is connected to a nut. The nut is locked onto the surface of the mounting base 23. Specifically, the first assembly shaft 27 passes through a through hole in one mounting base 23, an assembly hole in the engine 22, and a through hole in another mounting base 23 in sequence, and is then threaded onto the nut.

[0063] The mounting base 23 has fastening bolts 25 connected to the bottom of both ends of its base body. The fastening bolts 25 are used to fix the base body to the base plate 210 of the vehicle body bracket 1. Specifically, the base plate 210 is connected to the vehicle body bracket 1. The base plate 210 is horizontally set, and the two ends of the base body are set on the upper part of the base plate 210. The fastening bolts 25 pass vertically through the lower part of the base plate 210 and are threaded into the threaded holes at the bottom of both ends of the base body, thereby realizing the connection between the mounting base 23 and the vehicle body bracket 1.

Claims

1. A main frame for an all-terrain vehicle, characterized in that, The vehicle includes a body frame (1), and a rear rack is connected to the rear of the body frame (1). The rear rack includes a first frame and a second frame. The first frame and the second frame form a closed polygonal structure. Two third frames (15) are fixedly connected between the first frame and the second frame. The first frame includes a first crossbar segment (12) and two first support segments (14) set at both ends of the first crossbar segment (12). The first support segment (14) is a bent segment. The second frame includes a second crossbar segment (19). The two ends of the second crossbar segment (19) are respectively provided with a second support segment (17) and a third support segment (16). The third support segment (16) is a bent segment. The first crossbar segment (12), the first support segment (14) and the third bracket (15) are set on the same horizontal plane, and the third support segment (16) is set upward relative to the first support segment (14) and the third bracket (15); A support plate (13) is fixedly connected between the first support rod segment (14), the third bracket (15) and the third support rod segment (16). The support plate (13) has several through holes (112), and the structures of the several through holes (112) are different. The second support segment (17) is inclined downward relative to the third support (15), the height of the second crossbar segment (19) is lower than that of the first crossbar segment (12), and the second crossbar segment (19) is parallel to the first crossbar segment (12); An engine buffer device is connected to the vehicle body support (1), and the engine (22) is connected through the engine buffer device.

2. The main frame of the all-terrain vehicle according to claim 1, characterized in that, The two ends of the second crossbar segment (19) are respectively connected to the fourth bracket (18), and the two fourth brackets (18) are respectively connected to the two third brackets (15). The fourth brackets (18) are inclined relative to the second crossbar segment (19).

3. The main frame of the all-terrain vehicle according to claim 2, characterized in that, A first U-shaped plate (110) is fixedly connected to the second crossbar segment (19), and a second U-shaped plate (111) is fixedly connected between the second crossbar segment (19) and the fourth bracket (18). Both the first U-shaped plate (110) and the second U-shaped plate (111) have connection holes.

4. The main frame of the all-terrain vehicle according to claim 1, characterized in that, The bottom of each of the two third brackets (15) is fixedly connected to a mounting plate (113), and the mounting plate (113) has a mounting hole and a long strip hole.

5. The main frame of the all-terrain vehicle according to claim 1, characterized in that, The lower part of the second crossbar segment (19) is fixedly connected to a first mounting plate (114), and the first mounting plate (114) has a mounting hole (115) for bolting to the vehicle body bracket (1).

6. The main frame of the all-terrain vehicle according to claim 1, characterized in that, The engine buffer device includes four mounting seats (23). The bottom of the mounting seats (23) is fixedly connected to the vehicle body bracket (1). A connecting shaft (26) is connected between two mounting seats (23). Two second mounting plates (24) are fixedly connected to the connecting shaft (26). The two second mounting plates (24) are respectively fixedly connected to the two sides of the engine (22) by bolts. The second mounting plates (24) have a V-shaped structure and are sheet metal parts. The other two mounting seats (23) are connected to a first assembly shaft (27), which passes through the mounting hole on the engine (22). The two mounting seats (23) are located at both ends of the mounting hole on the engine (22).

7. The main frame of the all-terrain vehicle according to claim 6, characterized in that, The second mounting plate (24) has a buffer opening (28) at the bottom of its V-shaped structure.

8. The main frame of the all-terrain vehicle according to claim 6 or 7, characterized in that, The second mounting plate (24) has a V-shaped structure with two lower edges of a bent plate (29) attached to the lower part of the engine (22).

9. The main frame of the all-terrain vehicle according to claim 6, characterized in that, The mounting base (23) includes a base body, and a through hole is provided in the middle of the base body; Two mounting seats (23) close to the connecting shaft (26) have a second assembly shaft (21) connected through their through holes. The second assembly shaft (21) is set through the connecting shaft (26). The second assembly shaft (21) is a long bolt rod with an external thread at one end and a nut connected to it. The nut is locked onto the surface of the mounting seat (23). The first assembly shaft (27) is a long bolt rod with an external thread at one end and a nut connected to it. The nut is locked onto the surface of the mounting base (23).

10. The main frame of the all-terrain vehicle according to claim 6, characterized in that, The mounting base (23) has fastening bolts (25) at both ends of its base. The fastening bolts (25) are used to fix the base to the base plate (210) of the vehicle body bracket (1).

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