All-terrain vehicle

Abstract

The utility model provides an all-terrain vehicle. The all-terrain vehicle comprises a vehicle body, a walking assembly, a power assembly and a continuously variable transmission. The vehicle body includes a frame and a vehicle body cover. The vehicle body covering part is arranged on the vehicle frame. The walking assembly is at least partially connected to the frame. The power assembly is supported by the frame and is in transmission connection with the walking assembly. The continuously variable transmission is in transmission connection with the walking assembly and the power assembly. The continuously variable transmission includes an intake duct. The continuously variable transmission further comprises a silencing branch pipe. One side of the silencing branch pipe is arranged on the air inlet pipe and communicates with the air inlet pipe. The other sides of the silencing branch pipes are of a closed structure. According to the all-terrain vehicle, the noise of the continuously variable transmission can be reduced.

Description

Technical Field

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

[0002] All-terrain vehicles (ATVs), also known as all-terrain four-wheeled off-road vehicles, are simple, practical vehicles with excellent off-road capabilities. Their wide tires not only increase the contact area with the ground, generating greater friction, but also reduce the pressure exerted by the vehicle on the ground, making them easier to navigate in harsh terrain such as beaches, riverbeds, forest trails, streams, and deserts.

[0003] To reduce driver difficulty and adjust the engine's power output ratio to suit driving conditions, all-terrain vehicles are equipped with a continuously variable transmission (CVT) to adapt to changing output conditions. During operation, a CVT draws large amounts of air through the intake duct to reduce the engine's temperature. This process generates noticeable noise, which not only violates regulations but can also be transmitted into the cockpit, causing irritation to the driver and passengers and affecting ride comfort. Utility Model Content

[0004] In view of this, the present application provides an all-terrain vehicle with better riding comfort.

[0005] One embodiment of the present application provides an all-terrain vehicle. The all-terrain vehicle includes a vehicle body, a running assembly, a power assembly, and a continuously variable transmission (CVT). The vehicle body includes a frame and a body cover. The body cover is mounted on the frame. The running assembly is at least partially connected to the frame. The power assembly is supported by the frame and is transmission-connected to the running assembly. The CVT is transmission-connected to the running assembly and the power assembly. The CVT includes an intake pipe. The CVT also includes a silencer branch pipe. One side of the silencer branch pipe is disposed on the intake pipe and communicates with the intake pipe. The other side of the silencer branch pipe is a closed structure.

[0006] Furthermore, the air intake pipe is bent to form a concave area, and the muffler branch pipe is arranged in the concave area.

[0007] Furthermore, multiple silencer branch pipes are provided. The centerline lengths of different silencer branch pipes are different. Along the vertical direction of the vehicle frame, the air intake pipe has a head end and a tail end. The line connecting the lowest point of the head end and the lowest point of the tail end is defined as the lower boundary line. There is a base point on the air intake pipe. The length of the shortest line connecting the base point and the lower boundary line is greater than the length of the shortest line connecting other points on the air intake pipe and the lower boundary line. The connection position between the silencer branch pipe with a longer centerline and the air intake pipe is closer to the base point than the connection position between the silencer branch pipe with a shorter centerline and the air intake pipe.

[0008] Furthermore, the concave area is located above the lower boundary line, and the silencer branch pipe is located above the lower boundary line.

[0009] Furthermore, a plurality of silencer branch pipes are provided. A connecting piece is fixed to the outer wall of the air inlet pipe. The connecting piece is fixedly connected to at least two silencer branch pipes.

[0010] Furthermore, the connecting member includes a plurality of connecting portions. At least one connecting portion is fixedly connected between two adjacent silencer branch pipes. The connecting portion is connected to the air intake pipe.

[0011] Furthermore, a plurality of silencer branch pipes are provided, and the center lines of the plurality of silencer branch pipes are located in the same reference plane, and the reference plane is arranged vertically.

[0012] Furthermore, the included angle between the center line of the silencer branch pipe and any vertical line is a, and the range of a is 0° to 60°.

[0013] Furthermore, a ranges from 2° to 30°.

[0014] Furthermore, the outer contour of the projection of the silencer branch pipe on a reference plane perpendicular to the center line of the silencer branch pipe is substantially rectangular, circular or elliptical.

[0015] In an embodiment of the present application, the silencer branch pipe is connected to the intake pipe and sealed off from the external environment, so that when the air flow flows in the intake pipe and passes through the silencer branch pipe, vibrations of some frequencies pass through the silencer branch pipe and are reflected back to the intake pipe, and can cancel each other out, thereby eliminating the vibrations of the corresponding frequencies, thereby reducing the noise of the continuously variable transmission and improving driving comfort. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope.

[0017] Figure 1 A schematic structural diagram of an all-terrain vehicle provided in one embodiment of the present application;

[0018] Figure 2 A schematic structural diagram of a continuously variable transmission provided in one embodiment of the present application;

[0019] Figure 3 A schematic diagram of the structure of the air intake pipe and the silencer branch pipe provided in one embodiment of the present application;

[0020] Figure 4 A schematic structural diagram of another form of cooperation between the air intake pipe and the muffler branch pipe provided in one embodiment of the present application;

[0021] Figure 5A schematic diagram of the structure of the continuously variable transmission provided in one embodiment of the present application in conjunction with the frame and the traveling assembly;

[0022] Figure 6 for Figure 5 A schematic diagram of the structure of the continuously variable transmission, frame and running components from another perspective. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the present application will be described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments.

[0024] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application.

[0025] In the description of this application, it should be noted that the terms "inside" and "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on this application.

[0026] Furthermore, the terms "first," "second," "third," etc. are used for descriptive purposes only and are not to be understood as indicating or implying relative importance.

[0027] The following describes some embodiments of the present application in detail with reference to the accompanying drawings. In the absence of conflict, the following embodiments and features of the embodiments may be combined with each other.

[0028] In the following, the length direction of the all-terrain vehicle is taken as the front-back direction, the width direction of the all-terrain vehicle is taken as the left-right direction, and the height direction of the all-terrain vehicle is taken as the up-down direction. Figure 1 The front, back, left, right, top and bottom are defined in .

[0029] See also Figure 1 and Figure 2 One embodiment of the present application provides an all-terrain vehicle 100. The all-terrain vehicle 100 includes a vehicle body 10, a traveling assembly 20, a power assembly (not shown), and a continuously variable transmission 30. The vehicle body 10 includes a frame 11 and a body cover 12. The body cover 12 is provided on the frame 11. At least a portion of the traveling assembly 20 is connected to the frame 11. The power assembly is supported by the frame 11 and is transmission-connected to the traveling assembly 20. The continuously variable transmission 30 is transmission-connected to the traveling assembly 20 and the power assembly, respectively.

[0030] See also Figure 2 In some embodiments, the continuously variable transmission 30 includes an intake pipe 31 and a muffler branch pipe 32. The intake pipe 31 is used to draw air during operation to cool the continuously variable transmission 30. One side of the muffler branch pipe 32 is disposed on and communicates with the intake pipe 31. The other side of the muffler branch pipe 32 is a closed structure. Specifically, the muffler branch pipe 32 is a quarter-wavelength pipe.

[0031] By connecting the silencer branch 32 to the intake pipe 31 and sealing it from the external environment, when the air flow flows in the intake pipe 31 and passes through the silencer branch 32, vibrations of some frequencies pass through the silencer branch 32 and are reflected back to the intake pipe 31, which can offset the vibrations of the same frequency in the intake pipe 31, thereby reducing the sound of this part of the corresponding frequency from being transmitted into the air through the intake pipe 31, thereby reducing the noise of the continuously variable transmission 30, which is beneficial to avoid noise violations or interference with drivers and passengers.

[0032] See also Figures 2 to 4 In some embodiments, the silencer branch pipe 32 has a first end 321 and a second end 322 located at both ends, and a peripheral side 323 located between the first end 321 and the second end 322. The first end 321 is fixed to the air intake pipe 31 and is in communication with the air intake pipe 31. The second end 322 and the peripheral side 323 are both closed structures, that is, the gas cannot flow out of the silencer branch pipe 32 from the second end 322 and the peripheral side 323. The second end 322 and the peripheral side 323 of the silencer branch pipe 32 adopt a closed structure so that after the vibration in the air intake pipe 31 is transmitted from the first end 321 into the silencer branch pipe 32, it cannot be transmitted to the outside through the silencer branch pipe 32, and is eventually reflected back into the air intake pipe 31. After being reflected by the silencer branch pipe 32 of a set length, the peaks and troughs of the vibration of the same frequency overlap and cancel each other out, thereby achieving a noise reduction effect.

[0033] In some embodiments, within a certain range, the relationship between the structural parameters of the muffler branch 32 and the sound to be reduced can be determined by the following formulas (1) and (2):

[0034]

[0035] Wherein, λ is the wavelength, c is the speed of sound, f is the frequency, l is the length of the silencer branch pipe 32, and n is a fixed coefficient.

[0036] Therefore, within a certain range, the frequency of the sound that can be reduced is only affected by the length of the silencer branch pipe 32 .

[0037] See also Figures 2 to 4In some embodiments, the length of the muffler branch pipe 32 is the length from the first end 321 to the second end 322, and the length of the centerline 324 of the muffler branch pipe 32 can be equivalent to the length of the muffler branch pipe 32. It is understood that in some embodiments, when the muffler branch pipe 32 is disposed perpendicular to the intake pipe 31, the length of the centerline 324 of the muffler branch pipe 32 is equal to the distance from the first end 321 to the second end 322. When the muffler branch pipe 32 is not disposed perpendicular to the intake pipe 31, the length of the centerline 324 of the muffler branch pipe 32 is equivalent to the distance from the first end 321 to the second end 322. The centerline 324 of the muffler branch pipe 32 is the line connecting the midpoint of the first end 321 and the midpoint of the second end 322.

[0038] See also Figures 2 to 4 In some embodiments, a plurality of silencer branches 32 are provided. The plurality of silencer branches 32 is beneficial for improving the noise reduction effect of the continuously variable transmission 30.

[0039] See also Figure 2 In some embodiments, the center lines 324 of different muffler branches 32 have different lengths.

[0040] Different lengths of the centerline 324 of the silencer branch 32 result in different frequencies of vibrations that can be eliminated by the silencer branch 32. By providing silencer branch 32 with different centerline lengths, the frequency range of vibrations eliminated by the intake pipe 31 is expanded, thereby improving the noise reduction effect of the continuously variable transmission 30.

[0041] See also Figure 2 It is understood that in some embodiments, the centerline 324 of each of the multiple silencer branch pipes 32 has a different length. In other embodiments, the centerline 324 of some of the multiple silencer branch pipes 32 has different lengths, while the centerline 324 of some of the multiple silencer branch pipes 32 has the same length.

[0042] See also Figure 2 In some embodiments, among the multiple different silencer branches 32, the silencer branch 32 with the longest centerline 324 corresponds to the lower limit of the sound frequency range to be reduced, and the silencer branch 32 with the shortest centerline 324 corresponds to the upper limit of the sound frequency range to be reduced. Optionally, in some embodiments, among the multiple silencer branch pipes 32, the centerline 324 lengths of some silencer branch pipes 32 are between the longest and shortest centerline 324 lengths, so as to improve the noise reduction effect on sounds in the middle part of the sound frequency range to be reduced. As an exemplary example, Figure 2In the figure, the lengths of the center lines 324 of the four silencer branches 32 are all different. The lengths of the center lines 324 of the four silencer branches 32 from left to right in the drawing are 70 mm, 80 mm, 90 mm and 50 mm respectively. The four silencer branches 32 can reduce noise in the frequency range of 1000 Hz-1500 Hz.

[0043] See also Figure 3 In some embodiments, along the extending direction of the air intake pipe 31, the plurality of muffler branches 32 are arranged in a straight line or in a plurality of parallel straight lines (the arrangement in a plurality of parallel straight lines is not shown). Figure 4 In some embodiments, the angles along the circumference of the air intake pipe 31 are different, and the multiple silencer branch pipes 32 can be divided into two groups, and the two groups of silencer branch pipes 32 are interlaced along the extension direction of the air intake pipe 31.

[0044] In some embodiments, within a certain range, the relationship between the structural parameters of the air intake pipe 31 and the muffler branch pipe 32 and the sound to be reduced can be determined by the following formula (III):

[0045]

[0046] Wherein, TL is the transmission loss, m is the ratio of the cross-sectional area of ​​the silencer branch pipe 32 to the cross-sectional area of ​​the intake pipe 31, l is the length of the silencer branch pipe 32, and λ is the wavelength.

[0047] Therefore, combining formulas (1), (2) and (3), the noise reduction effect of a certain frequency of sound is basically related to the ratio of the cross-sectional area of ​​the intake pipe 31 to the cross-sectional area of ​​the silencer branch pipe 32.

[0048] See also Figures 2 to 4 In some embodiments, the outer contour of the projection of the muffler branch pipe 32 onto a reference plane perpendicular to its centerline 324 is substantially rectangular, circular, or elliptical. The rectangular, circular, or elliptical cross-section of the muffler branch pipe 32 minimizes the cross-sectional area of ​​the muffler branch pipe 32 while also minimizing the space occupied by the muffler branch pipe 32 on the reference plane perpendicular to its centerline 324, thereby improving space utilization.

[0049] It is understood that in some embodiments, the outer contour of the projection of the muffler branch pipe 32 onto a reference plane perpendicular to its centerline 324 is rectangular, including a right-angled rectangle and a rounded-corner rectangle. The side edges of the cross section of the muffler branch pipe 32 may not extend along a standard straight line, but may be slightly curved, so that the overall shape is approximately rectangular.

[0050] In other embodiments, the outer contour of the projection of the silencer branch pipe 32 on the reference plane perpendicular to the center line 324 of the silencer branch pipe 32 may also be substantially in the shape of a triangle, a pentagon or a special shape.

[0051] See also Figure 2 In some embodiments, the continuously variable transmission 30 further includes a connector 33. The connector 33 is fixed to the outer wall of the intake pipe 31. The connector 33 is fixedly connected to at least two silencer branches 32.

[0052] By providing a connector 33 to fix the multiple silencer branches 32 and the intake pipe 31 to each other, it is beneficial to avoid independent vibration and shaking of each silencer branch 32, thereby reducing the possibility of local tearing, thereby improving the structural stability of the continuously variable transmission 30.

[0053] See also Figure 2 In some embodiments, the connector 33 includes a plurality of connectors 331 . At least one connector 331 is fixedly connected between two adjacent muffler branches 32 , and the connector 331 is connected to the air intake pipe 31 .

[0054] By providing the connecting portion 331 , each silencer branch pipe 32 is fixed to other silencer branch pipes 32 , and each silencer branch pipe 32 is fixed to the intake pipe 31 , so as to further improve the structural stability of the continuously variable transmission 30 .

[0055] See also Figure 2 In some embodiments, the connecting member 33 is a plate-shaped structure to improve the stability of the fixing of the muffler branch pipe 32. In some embodiments, the plate-shaped connecting member 33 is provided with a hollow structure (not shown) to help reduce weight.

[0056] See also Figure 2 In some embodiments, the air inlet pipe 31 is bent to form a concave area 311. The muffler branch pipe 32 is provided in the concave area 311. Figure 2 The dotted line portion is the concave area 311 .

[0057] On the one hand, the intake pipe 31 is bent to adapt to the structural shape of the assembly position of the intake pipe 31, so as to facilitate the fixation of the intake pipe 31; on the other hand, the silencer branch pipe 32 is arranged in the concave area 311 to effectively utilize the space occupied by the intake pipe 31, improve the space utilization rate inside the all-terrain vehicle 100, and enable the silencer branch pipe 32 to be protected by the intake pipe 31, which is beneficial to protect the silencer branch pipe 31 from being affected by other structures or foreign objects of the all-terrain vehicle 100 to a certain extent.

[0058] See also Figure 1 、 Figure 5 and Figure 6 In some embodiments, the traveling assembly 20 includes wheels 21. The air intake duct 31 is provided at a position of the vehicle frame 11 corresponding to the wheel 21.

[0059] The position of the air intake pipe 31 corresponds to the position of the wheel 21, and the muffler branch pipe 32 is arranged in the concave area 311 to avoid the wheel 21. In this way, the noise of the continuously variable transmission 30 is reduced while reducing the impact on the running of the running assembly 20.

[0060] See also Figure 2 In some embodiments, the intake pipe 31 has a head end 312 and a tail end 313. The line connecting the lowest point of the head end 312 and the lowest point of the tail end 313 is defined as the lower boundary line L. The intake pipe 31 has a base point P. The length of the shortest line connecting the base point P and the lower boundary line L is greater than the length of the shortest line connecting any other point on the intake pipe 31 and the lower boundary line L. The connection location between the muffler branch pipe 32 with a longer centerline 324 and the intake pipe 31 is closer to the base point P than the connection location between the muffler branch pipe 32 with a shorter centerline 324 and the intake pipe 31.

[0061] The base point P is located at the deepest position in the concave area 311. The silencer branch pipe 32 with a longer centerline 324 is arranged at a position with a deeper concave depth to further reduce the installation space occupied by the silencer branch pipe 32 relative to the intake pipe 31 and further improve the space utilization inside the all-terrain vehicle 100.

[0062] See also Figure 2 It is understandable that, in some embodiments, the connection position between the muffler branch pipe 32 and the intake pipe 31 where the center line 324 is the longest is the base point P.

[0063] See also Figure 2 In some embodiments, the concave area 311 is located above the lower boundary line L. The muffler branch pipe 32 is located above the lower boundary line L.

[0064] The recessed area 311 and the silencer branch pipe 32 are located above the lower boundary line L so that, based on the space occupied by the air intake pipe 31 in the vehicle body 10, the recessed area 311 and the silencer branch pipe 32 can be avoided as much as possible from exceeding the space occupied by the air intake pipe 31, thereby reducing the space occupied by other structures of the all-terrain vehicle 100 and improving space utilization.

[0065] See also Figure 3 In some embodiments, the center lines 324 of the plurality of muffler branches 32 are located in the same reference plane S. The reference plane S is vertically arranged.

[0066] The centerlines 324 of the multiple silencer branches 32 lie within the same reference plane S, reducing the horizontal width of the space occupied by the multiple silencer branches 32. This helps prevent the silencer branches 32 from encroaching on the space available for other structures on the ATV 100. The intake duct 31 occupies a certain width horizontally, roughly equal to its diameter. The silencer branches 32 are arranged vertically to ensure they are positioned as closely as possible within the space occupied by the intake duct 31. This helps prevent the silencer branches 32 from encroaching on the space available for other structures on the ATV 100. The vertical orientation of the reference plane S does not necessarily mean that the reference plane S is completely parallel to the vertical direction; the reference plane S may also be slightly inclined relative to the vertical direction.

[0067] See also Figure 4 In some embodiments, the angle a between the centerline 324 of the silencer branch pipe 32 and any vertical line b ranges from 0° to 60°. The vertical line b is parallel to the vertical direction. The silencer branch pipe 32 is tilted relative to the vertical direction to utilize horizontal space, thereby reducing the amount of longitudinal space occupied. This facilitates the placement of other structures of the all-terrain vehicle 100 below the intake pipe 31 and the silencer branch pipe 32.

[0068] See also Figure 4 In some embodiments, the angle a ranges from 2° to 30°. This reduces the amount of longitudinal space occupied by the muffler branch pipe 32 in the concave area 311 and also reduces the amount of transverse space occupied by the vehicle body 10.

[0069] As an illustrative example, a can be 0°, 1°, 2°, 3°, 5°, 10°, 15°, 20°, 30°, 45°, 60°, etc.

[0070] In addition, those skilled in the art should recognize that the above embodiments are merely intended to illustrate the present application and are not intended to limit the present application. As long as they are within the spirit of the present application, appropriate changes and modifications to the above embodiments are within the scope of disclosure of the present application.

Claims

1. An all-terrain vehicle comprising: A vehicle body, the vehicle body comprising a vehicle frame and a vehicle body covering, the vehicle body covering being arranged on the vehicle frame; a traveling assembly, the traveling assembly being at least partially connected to the vehicle frame; A power assembly, the power assembly being supported by the frame and being transmission-connected to the traveling assembly; A continuously variable transmission, the continuously variable transmission being in transmission connection with the travel assembly and the power assembly, the continuously variable transmission including an intake pipe; It is characterized in that the continuously variable transmission also includes a silencer branch pipe, which is fixed to the intake pipe; the silencer branch pipe has a first end and a second end located at both ends and a peripheral side located between the first end and the second end; the first end is fixed to the intake pipe and is connected to the intake pipe; the second end and the peripheral side are both closed structures.

2. The all-terrain vehicle according to claim 1, wherein: The air intake pipe is bent to form a concave area, and the muffler branch pipe is arranged in the concave area.

3. The all-terrain vehicle according to claim 2, wherein: There are multiple silencer branch pipes, and the centerline lengths of different silencer branch pipes are different; the intake pipe has a head end and a tail end, and along the vertical direction of the frame, the line connecting the lowest point of the head end and the lowest point of the tail end is defined as the lower boundary line; the intake pipe has a base point, and the length of the shortest line between the base point and the lower boundary line is greater than the length of the shortest line between other points on the intake pipe and the lower boundary line; the connection position between the silencer branch pipe with a longer centerline and the intake pipe is closer to the base point than the connection position between the silencer branch pipe with a shorter centerline and the intake pipe.

4. The all-terrain vehicle according to claim 3, wherein: The concave area is located above the lower boundary line, and the silencer branch pipe is located above the lower boundary line.

5. The all-terrain vehicle according to claim 1 or 2, characterized in that: There are multiple silencer branches; a connecting piece is fixed to the outer wall of the air intake pipe, and the connecting piece is fixedly connected to at least two of the silencer branches.

6. The all-terrain vehicle according to claim 5, wherein: The connecting member includes a plurality of connecting parts, at least one of the connecting parts is fixedly connected between two adjacent silencer branch pipes, and the connecting part is connected to the air intake pipe.

7. The all-terrain vehicle according to claim 1 or 2, characterized in that: There are multiple silencer branch pipes, and the center lines of the multiple silencer branch pipes are located in the same reference plane, and the reference plane is vertically arranged.

8. The all-terrain vehicle according to claim 1 or 2, characterized in that: The included angle between the center line of the silencer branch pipe and any vertical line ranges from 0° to 60°.

9. The all-terrain vehicle according to claim 8, wherein: The angle ranges from 2° to 30°.

10. The all-terrain vehicle according to claim 1 or 2, characterized in that: The outer contour of the projection of the muffler branch pipe on a reference plane perpendicular to the center line of the muffler branch pipe is substantially rectangular, circular or elliptical.

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