All-terrain vehicle

Abstract

An all-terrain vehicle comprises a vehicle frame, a vehicle body covering part, a walking system, a power system and a transmission system. The frame comprises a frame body and a bottom beam, and the bottom beam is arranged in the length direction of the frame and connected with the frame body. The vehicle body covering part at least partially covers the vehicle frame, the walking system is connected to the vehicle frame and at least partially located below the vehicle frame, the power system is supported by the vehicle frame and provides power for the walking system, and the transmission system is in transmission connection with the power system and the walking system. The bottom beam comprises two variable-diameter sections and two fixed-diameter sections, the two variable-diameter sections are located between the two fixed-diameter sections, the two variable-diameter sections are connected in the extending direction of the bottom beam, and the sectional areas of the two variable-diameter sections are gradually increased in the direction close to each other; the two variable-diameter sections form the middle section, each end of the middle section is connected with the fixed-diameter section, and the average sectional area of the fixed-diameter sections is smaller than that of the variable-diameter sections, so that the strength of the bottom beam is improved, and the frame strength of the all-terrain vehicle is enhanced.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of vehicle technology, in particular to an all-terrain vehicle. BACKGROUND

[0002] The chassis bottom beam of some types of all-terrain vehicles is composed of square tubes, which plays a role in strengthening the strength of the chassis of the entire all-terrain vehicle. With the increasing off-road strength of all-terrain vehicles, the demand for improving the strength of the chassis is also more intense. CONTENT OF THE UTILITY MODEL

[0003] Therefore, the present application provides an all-terrain vehicle with high chassis strength.

[0004] The embodiment of the present application provides an all-terrain vehicle, which comprises a chassis, a vehicle body cover, a walking system, a power system and a transmission system. The chassis comprises a frame body and a bottom beam, the bottom beam is arranged along the length direction of the chassis and connected to the frame body. The vehicle body cover is at least partially covered on the chassis, the walking system is connected to the chassis and at least partially located below the chassis, the power system is supported by the chassis and provides power for the walking system, and the transmission system is transmissionally connected to the power system and the walking system. The bottom beam comprises two variable-diameter sections and two constant-diameter sections, the two variable-diameter sections are located between the two constant-diameter sections, the two variable-diameter sections are connected along the extension direction of the bottom beam, and the cross-sectional area of the two variable-diameter sections gradually increases in the direction of approaching each other; the two variable-diameter sections form a middle section, each end of the middle section is connected to a constant-diameter section, and the average cross-sectional area of the constant-diameter section is smaller than the average cross-sectional area of the variable-diameter section.

[0005] Optionally, the variable-diameter section corresponds to the constant-diameter section one by one, and the variable-diameter section and the corresponding constant-diameter section are integrally formed.

[0006] Optionally, the frame body comprises an outer frame, and the part of the bottom beam connected to the outer frame comprises a front connecting part and a rear connecting part; along the length direction of the chassis, the front connecting part is located on the front variable-diameter section, and the rear connecting part is located on the rear variable-diameter section.

[0007] Optionally, the bottom beam further comprises a splicing section, the splicing section is detachably connected between the two variable-diameter sections, and the cross-sectional area of the splicing section is constant and equal to the maximum cross-sectional area of the variable-diameter section.

[0008] Optionally, in any plane perpendicular to the width direction of the chassis, the orthogonal projection of the splicing section and the orthogonal projection of the outer frame at least partially coincide.

[0009] Optionally, in any plane perpendicular to the width direction of the chassis, the orthogonal projection of the connecting point of the two variable-diameter sections and the orthogonal projection of the outer frame at least partially coincide.

[0010] Optionally, a plane perpendicular to the width direction of the all-terrain vehicle and passing through the center of the width of the all-terrain vehicle is defined as the longitudinal plane. The variable diameter section near the rear of the frame includes connected bending segments and straight segments. The bending segments connect to the variable diameter section near the front of the frame, and the straight segments connect to the fixed diameter section near the rear of the frame. Along the length direction of the frame, in any plane perpendicular to the length direction of the frame, the orthographic projections of the bending segments and the straight segments are located on the side of the orthographic projection of the variable diameter section near the front of the frame that is away from the longitudinal plane.

[0011] Optionally, the straight section has a straight connecting portion that connects to a sizing section near the rear of the frame, and the straight connecting portion and the rear connecting portion are spaced apart along the length of the frame.

[0012] Optionally, along the length of the frame, the distance between the midpoint of the spliced ​​section and the foremost end of the bottom beam is defined as the front length of the beam, and the ratio of the front length of the beam to the total length of the bottom beam along the length of the frame is in the range of 0.25-0.75.

[0013] Optionally, along the length of the frame, the distance between the connection point of the two variable diameter sections and the foremost end of the bottom beam is defined as the local length of the beam, and the ratio of the local length of the beam to the total length of the bottom beam along the length of the frame is in the range of 0.23-0.73.

[0014] The cross-sectional areas of the two variable-diameter sections of the bottom beam gradually increase in the direction of mutual approach, and the average cross-sectional area of ​​the fixed-diameter section is smaller than that of the variable-diameter section, thereby improving the strength of the bottom beam and strengthening the frame of the all-terrain vehicle. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of an all-terrain vehicle in one embodiment of this application;

[0016] Figure 2 This is a schematic diagram of the overall structure of the vehicle frame in one embodiment of this application;

[0017] Figure 3 This is a top view of the overall structure in one embodiment of this application;

[0018] Figure 4 This is a schematic diagram of the overall structure of the bottom beam in one embodiment of this application;

[0019] Figure 5 This is a top view of the overall structure in another embodiment of this application;

[0020] Figure 6 This is a schematic diagram of the overall structure of the bottom beam in another embodiment of this application;

[0021] Figure 7 This is a schematic cross-sectional view of the bottom beam in one embodiment of this application;

[0022] Figure 8 This is a schematic cross-sectional view of the bottom beam in another embodiment of this application;

[0023] Figure 9 This is a schematic cross-sectional view of the bottom beam in another embodiment of this application;

[0024] Figure 10 This is a schematic cross-sectional view of the bottom beam in another embodiment of this application;

[0025] Figure 11 This is a schematic cross-sectional view of the bottom beam in another embodiment of this application;

[0026] Figure 12 This is a cross-sectional schematic diagram of the bottom beam in another embodiment of this application. Detailed Implementation

[0027] To further illustrate the technical means and effects adopted by this application to achieve the intended purpose, the following description, in conjunction with the accompanying drawings and embodiments, is provided. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments.

[0028] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

[0029] The following detailed description of some embodiments of this application is provided in conjunction with the accompanying drawings. Unless otherwise specified, the embodiments and features described below can be combined with each other.

[0030] Please see Figure 1 and Figure 2 An all-terrain vehicle 100 includes a frame 11, a body panel 12, a running system 13, a power system 14, and a transmission system 15.

[0031] For ease of description of the technical solutions in this application, the following definitions are provided: Figure 1 The directions shown are front, back, left, right, up, and down. The front-back direction refers to the length of the frame 11, the left-right direction refers to the width of the frame 11, and the up-down direction refers to the height of the frame 11.

[0032] Body panel 12 at least partially covers frame 11. Running gear 13 is connected to frame 11 along the height of frame 11 and is at least partially located below frame 11. Power system 14 is supported by frame 11, and drivetrain 15 drivesly connects power system 14 and running gear 13, thereby providing power to running gear 13.

[0033] The walking system 13 includes two front wheels 131 located in front of the all-terrain vehicle 100 and two rear wheels 132 located behind the all-terrain vehicle 100, and the front wheels 131 and the rear wheels 132 are respectively rotatably connected to the frame 11.

[0034] In some embodiments, the frame 11 includes a frame body 111 and a bottom beam 112, the bottom beam 112 being arranged along the length of the frame 11 and connected to the frame body 111, thereby supporting the frame body 111.

[0035] Two bottom beams 112 are provided, both extending approximately along the length of the frame 11. A longitudinal plane S is defined as a plane perpendicular to the width of the frame 11 and passing through the center of the width of the frame 11. The two bottom beams 112 are arranged symmetrically along the longitudinal plane S. The two bottom beams 112 simultaneously support the frame 111, which helps to improve the strength of the frame 11.

[0036] The following explanation will take one of the bottom beams, 112, as an example.

[0037] Please see Figure 3 The bottom beam 112 includes two variable-diameter sections 1121 and two fixed-diameter sections 1122. The two variable-diameter sections 1121 are located between the two fixed-diameter sections 1122 and are connected along the extension direction of the bottom beam 112. The cross-sectional area of ​​the two variable-diameter sections 1121 gradually increases as they approach each other. That is, the cross-sectional area of ​​the variable-diameter section 1121 closer to the front of the frame 11 gradually increases from front to rear, and the cross-sectional area of ​​the variable-diameter section 1121 closer to the rear of the frame 11 gradually decreases from front to rear.

[0038] Please see Figure 3 and Figure 4 Two variable-diameter sections 1121 form a middle section 11201. In some embodiments, the cross-sectional areas of the two end faces of the middle section 11201 are the same, and are the minimum cross-sectional areas of the middle section 11201 along the extension direction of the bottom beam 112. Each end of the middle section 11201 is connected to a fixed-diameter section 1122. The cross-sectional area of ​​the fixed-diameter section 1122 is equal to the cross-sectional areas of the two end faces of the middle section 11201, and the average cross-sectional area of ​​the fixed-diameter section 1122 is less than the average cross-sectional area of ​​the variable-diameter section 1121.

[0039] In some other embodiments, the cross-sectional areas of the two end faces of the middle section 11201 are not the same. Each end of the middle section 11201 is connected to a sizing section 1122. The cross-sectional area of ​​the sizing section 1122 near the front of the frame 11 is equal to the cross-sectional area of ​​the front end face of the middle section 11201, and the cross-sectional area of ​​the sizing section 1122 near the rear of the frame 11 is equal to the cross-sectional area of ​​the rear end face of the middle section 11201.

[0040] Compared to increasing the overall cross-sectional area of ​​the bottom beam 112 to improve the strength of the frame 11, this application improves the strength of the all-terrain vehicle 100 frame 11 by placing two variable diameter sections 1121 between two fixed diameter sections 1122, with the cross-sectional area of ​​the two variable diameter sections 1121 gradually increasing in the direction of approaching each other. This reduces the overall weight of the bottom beam 112 while improving the strength of the bottom beam 112.

[0041] In some embodiments, the variable diameter section 1121 corresponds one-to-one with the fixed diameter section 1122, and the variable diameter section 1121 and the corresponding fixed diameter section 1122 are integrally formed. That is, the fixed diameter section 1122 and the variable diameter section 1121 near the front of the frame 11 are integrally formed, and the fixed diameter section 1122 and the variable diameter section 1121 near the rear of the frame 11 are integrally formed.

[0042] In some embodiments, the frame 111 includes an outer frame 1111, and the portion of the bottom beam 112 that connects to the outer frame 1111 includes a front connecting portion 1124 and a rear connecting portion 1125. The front connecting portion 1124 and the rear connecting portion 1125 are connected to the outer frame 1111 by welding.

[0043] The junction between the variable diameter section 1121 and the corresponding fixed diameter section 1122 is prone to stress concentration due to the change in cross-sectional area. Along the length of the frame 11, the front connecting part 1124 is located on the front variable diameter section 1121, and the rear connecting part 1125 is located on the rear variable diameter section 1121. This spacing between the front connecting part 1124 and the rear connecting part 1125 and the aforementioned junction helps to reduce the impact of stress changes at the junction on the welding effect and improves the connection strength between the outer frame 1111 and the bottom beam 112.

[0044] Please see Figure 5 and Figure 6 In some embodiments, the bottom beam 112 further includes a splicing section 1123, which is detachably connected between two variable diameter sections 1121. The cross-sectional area of ​​the splicing section 1123 remains unchanged and is equal to the maximum cross-sectional area of ​​the variable diameter section 1121.

[0045] It is worth noting that the splicing section 1123 is detachably connected between the two variable diameter sections 1121. This means that the splicing section 1123 can be selected in different lengths according to the wheelbase design of the all-terrain vehicle 100, thus adapting to two-seater (short wheelbase) or four-seater (long wheelbase) models. The splicing section 1123 is connected to the two variable diameter sections 1121 by welding.

[0046] Please see Figure 5 and Figure 6In some embodiments, in any plane perpendicular to the width direction of the frame 11, the orthographic projection of the splicing segment 1123 at least partially coincides with the orthographic projection of the outer frame 1111, which is beneficial to strengthen the splicing segment 1123 and the two variable diameter segments 1121 through the outer frame 1111.

[0047] Please see Figure 3 and Figure 4 In some embodiments, the two variable diameter sections 1121 are directly connected. In any plane perpendicular to the width direction of the frame 11, the orthographic projection of the connection point of the two variable diameter sections 1121 at least partially coincides with the orthographic projection of the outer frame 1111, which is beneficial to strengthen the connection strength of the two variable diameter sections 1121 through the outer frame 1111.

[0048] Please see Figure 5 and Figure 6 In some embodiments, the variable diameter section 1121 near the rear of the frame 11 includes connected bent sections 1121a and straight sections 1121b. The bent sections 1121a are connected to the variable diameter section 1121 near the front of the frame 11, and the straight sections 1121b are connected to the fixed diameter section 1122 near the rear of the frame 11.

[0049] Along the length of the frame 11, in any plane perpendicular to the length of the frame 11, the orthographic projections of the bent segment 1121a and the straight segment 1121b are located on the side of the orthographic projection of the variable diameter segment 1121 near the front of the frame 11 that is away from the longitudinal plane S. This is beneficial to increase the distance between the variable diameter segments 1121 near the rear of the frame 11 in the two bottom beams 112, thereby facilitating the arrangement of other structures of the all-terrain vehicle 100.

[0050] In some embodiments, the straight section 1121b has a straight connecting portion 1121b1 connected to the sizing section 1122 near the rear of the frame 11. The straight connecting portion 1121b1 and the rear connecting portion 1125 are spaced apart along the length of the frame 11, thereby offsetting two areas prone to stress concentration and improving the strength of the bottom beam 112.

[0051] Please see Figure 5 and Figure 6 In some embodiments, the distance between the midpoint of the splicing segment 1123 and the foremost end of the bottom beam 112 along the length direction of the frame 11 is defined as the front length of the beam, and the ratio of the front length of the beam to the total length of the bottom beam 112 along the length direction of the frame 11 is in the range of 0.25-0.75.

[0052] Please see Figure 3 and Figure 4In some embodiments, the distance between the connection point of the two variable diameter sections 1121 and the foremost end of the bottom beam 112 along the length direction of the frame 11 is defined as the local length of the beam, and the ratio of the local length of the beam to the total length of the bottom beam 112 along the length direction of the frame 11 is in the range of 0.23-0.73.

[0053] Please see Figure 7 and Figure 8 In some embodiments, the bottom beam 112 is made of two plate-shaped metal materials that are bent and then welded together. The bottom beam 112 includes a first plate 1126 and a second plate 1127, which are bent and then welded together to form an isosceles trapezoid, a rounded rectangle, or a polygonal cross-sectional shape.

[0054] Please see Figures 9 to 12 In some embodiments, the bottom beam 112 is formed by extrusion molding using a die. After the material of the bottom beam 112 is heated to a plastic state, it is extruded through a die to form the desired cross-sectional shape, such as an isosceles trapezoid, a rounded rectangle, or a polygon.

[0055] Furthermore, those skilled in the art should recognize that the above embodiments are merely illustrative of this application and are not intended to limit this application. Any appropriate changes and variations made to the above embodiments within the essential spirit and scope of this application fall within the scope of this application's disclosure.

Claims

1. An all-terrain vehicle, comprising: Frame; A body panel that at least partially covers the vehicle frame; A walking system, the walking system being connected to the frame and at least partially located under the frame; A power system, which is supported by the vehicle frame and provides power to the running gear; A transmission system that drivesly connects the power system and the walking system; The frame includes a frame body and a bottom beam, the bottom beam being arranged along the length of the frame body and connected to the frame body; The bottom beam is characterized in that it comprises two variable-diameter sections and two fixed-diameter sections, the two variable-diameter sections are located between the two fixed-diameter sections, the two variable-diameter sections are connected along the extension direction of the bottom beam, and the cross-sectional areas of the two variable-diameter sections gradually increase in the direction of mutual approach; the two variable-diameter sections form a middle section, and each end of the middle section is connected to a fixed-diameter section, the average cross-sectional area of ​​the fixed-diameter section is smaller than the average cross-sectional area of ​​the variable-diameter sections.

2. The all-terrain vehicle as described in claim 1, characterized in that, The variable diameter section corresponds one-to-one with the fixed diameter section, and the variable diameter section and the corresponding fixed diameter section are integrally formed.

3. The all-terrain vehicle as described in claim 1, characterized in that, The frame includes an outer frame, and the parts on the bottom beam that connect to the outer frame include a front connecting part and a rear connecting part; along the length direction of the frame, the front connecting part is located on the front of the variable diameter section, and the rear connecting part is located on the rear of the variable diameter section.

4. The all-terrain vehicle as described in claim 3, characterized in that, The bottom beam also includes a splicing section, which is detachably connected between the two variable diameter sections. The cross-sectional area of ​​the splicing section remains unchanged and is equal to the maximum cross-sectional area of ​​the variable diameter section.

5. The all-terrain vehicle as described in claim 4, characterized in that, In any plane perpendicular to the width direction of the frame, the orthographic projection of the splicing segment at least partially coincides with the orthographic projection of the outer frame.

6. The all-terrain vehicle as described in claim 3, characterized in that, In any plane perpendicular to the width direction of the frame, the orthographic projection of the connection point of the two variable diameter sections at least partially coincides with the orthographic projection of the outer frame.

7. The all-terrain vehicle as described in claim 3, characterized in that, Define a plane perpendicular to the width direction of the all-terrain vehicle and passing through the center of the width of the all-terrain vehicle as a longitudinal plane. The variable diameter section near the rear of the frame includes connected bending segments and straight segments. The bending segments connect to the variable diameter section near the front of the frame, and the straight segments connect to the fixed diameter section near the rear of the frame. Along the length direction of the frame, in any plane perpendicular to the length direction of the frame, the orthographic projections of the bending segments and the straight segments are located on the side of the orthographic projection of the variable diameter section near the front of the frame that is away from the longitudinal plane.

8. The all-terrain vehicle as described in claim 7, characterized in that, The straight section has a straight connecting portion that connects to the sizing section near the rear of the frame, and the straight connecting portion and the rear connecting portion are spaced apart along the length direction of the frame.

9. The all-terrain vehicle as described in claim 4, characterized in that, Along the length of the vehicle frame, the distance between the midpoint of the splicing segment and the foremost end of the bottom beam is defined as the front length of the beam. The ratio of the front length of the beam to the total length of the bottom beam along the length of the vehicle frame is in the range of 0.25-0.

75.

10. The all-terrain vehicle as described in claim 1, characterized in that, Along the length of the frame, the distance between the connection point of the two variable diameter sections and the foremost end of the bottom beam is defined as the local length of the beam. The ratio of the local length of the beam to the total length of the bottom beam along the length of the frame is in the range of 0.23-0.73.

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