A motorcycle rectifier head cover

Abstract

The embodiment of the application provides a motorcycle fairing cover, which is used for increasing the adhesion of motorcycle wheels to the ground and improving the steering characteristics of the motorcycle, and comprises a cover main body and two movable side strips, the two movable side strips are symmetrically installed on the two sides of the cover main body, and the movable side strips are movably connected with the cover main body, so that the movable side strips can change the negative angle of attack. In the embodiment of the application, two movable side strips are arranged on the motorcycle fairing cover, the movable side strips interact with air to generate negative lift during the running of the motorcycle, the force direction of the movable side strips is downward, so that the pressure and the adhesion of the motorcycle wheels to the ground are increased under the action of the negative lift, and the stability and the steering performance of the motorcycle are improved. The movable side strips are movably connected with the cover main body, so that the negative lift can be flexibly adjusted.

Description

TECHNICAL FIELD

[0001] The embodiment of the present application relates to the field of motorcycles, in particular to a motorcycle fairing head cover. BACKGROUND

[0002] At present, motorcycle production enterprises and research and development units in China only imitate the vehicle model design of foreign famous manufacturers in the appearance of motorcycles, and do not have complete and systematic research and exploration on the aerodynamics, aerodynamic appearance design, vehicle motion dynamics and other problems of vehicles.

[0003] In recent years, with the rapid development of China's economy, domestic motorcycle products are also developing towards large displacement and high speed. However, due to the lack of research and understanding of the basic aerodynamic characteristics of high-speed motorcycles by most motorcycle production enterprises or research institutions in China, when developing large displacement motorcycles (motorcycles with engine displacement of more than 600 mL in China are generally referred to as large displacement motorcycles), they are limited by appearance and control quality and other factors. A large part of domestic motorcycles have different degrees of wheel handling decline and poor grip when running at high speed (such as speed above 120 kilometers per hour). That is, the so-called "car flying". This has a very important influence on the stability of the motorcycle, and "car flying" will seriously threaten the normal driving of the motorcycle and the safety of the driver.

[0004] How to make the motorcycle wheels firmly contact with the ground (commonly known as "grip") under the premise of not significantly increasing the mass of the motorcycle, ensuring small wind resistance and ensuring the overall appearance of the motorcycle is a problem to be solved at present. SUMMARY

[0005] The embodiment of the present application provides a motorcycle fairing head cover for increasing the adhesion between the motorcycle wheels and the ground and improving the handling characteristics of the motorcycle.

[0006] The embodiment of the present application provides a motorcycle fairing head cover, characterized in that it comprises a head cover main body and two movable edge strips, the two movable edge strips are symmetrically installed on the two sides of the head cover main body, and the movable edge strips are movably connected with the head cover main body, so that the movable edge strips can change the negative angle of attack.

[0007] In one implementation manner of the embodiment of the present application, the movable edge strip is a triangular edge strip, which can generate a detached vortex, and the force direction of the detached vortex acting on the movable edge strip is downward.

[0008] The downward force direction refers to the direction of the force component in the plumb direction.

[0009] In one implementation manner of the embodiment of the present application, the movable edge strip comprises an edge strip main body and a negative angle of attack adjusting piece.

[0010] The negative angle of attack adjusting piece is connected with the edge bar body, so that the edge bar body can change the negative angle of attack under the action of the negative angle of attack adjusting piece.

[0011] In an implementation manner of the embodiment of the application, the negative angle of attack adjusting piece is a wing surface mechanism, so that the negative angle of attack adjusting piece generates lift when moving relative to air.

[0012] In an implementation manner of the embodiment of the application, the movable edge bar further comprises a connecting rod.

[0013] The negative angle of attack adjusting piece is connected with the edge bar body through the connecting rod, so that the negative angle of attack adjusting piece drives the edge bar body to move.

[0014] In an implementation manner of the embodiment of the application, the movable edge bar further comprises a rotating shaft.

[0015] The edge bar body is rotationally connected with the head cover body through the rotating shaft.

[0016] In an implementation manner of the embodiment of the application, the movable edge bar further comprises a locking mechanism.

[0017] The locking mechanism is used for locking when the speed of the motorcycle is less than a preset speed, so that the movable edge bar is fixed on the head cover body; and the locking mechanism is used for unlocking when the speed of the motorcycle is greater than or equal to the preset speed, so that the movable edge bar can move relative to the head cover body.

[0018] In an implementation manner of the embodiment of the application, the locking mechanism comprises an electromagnet, a spring and a locking protrusion.

[0019] The spring makes the locking protrusion protrude from the surface of the head cover body when the locking mechanism is locked, and the electromagnet attracts the locking protrusion to retract into the inside of the head cover body when the locking mechanism is unlocked.

[0020] In an implementation manner of the embodiment of the application, the locking mechanism further comprises a control circuit.

[0021] The input end of the control circuit is connected with a motorcycle speed sensor, and the output end of the control circuit is connected with the electromagnet.

[0022] In an implementation manner of the embodiment of the application, when the locking mechanism is locked, the negative angle of attack of the movable edge bar is less than a preset angle.

[0023] In an implementation manner of the embodiment of the application, the movable edge bar further comprises an angle of attack limiting mechanism.

[0024] The angle of attack limiting mechanism protrudes from the surface of the head cover body and is used for limiting the movement range of the negative angle of attack adjusting piece.

[0025] As can be seen from the above technical solutions, the embodiment of the application has the following advantages:

[0026] In the embodiment of the application, two movable edge strips are arranged on the motorcycle fairing cover, and the movable edge strips interact with air to generate negative lift during the running of the motorcycle. The force direction of the movable edge strips is downward, so that the motorcycle increases the pressure and adhesion of the motorcycle wheels with the ground under the action of the negative lift, and the stability and handling performance of the motorcycle are improved. The movable edge strips are movably connected with the fairing main body, so as to flexibly adjust the negative lift. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 is a schematic diagram of the positive lift flow field generated by the motorcycle in the prior art when running;

[0028] Figure 2 is a schematic diagram of the structure of the motorcycle fairing cover of the embodiment of the application installed on the motorcycle;

[0029] Figure 3 is a perspective view of the motorcycle fairing cover of the embodiment of the application;

[0030] Figure 4 is a schematic diagram of the shed vortex generated by the motorcycle fairing cover of the embodiment of the application;

[0031] Figure 5 is a schematic diagram of the negative lift flow field generated by the motorcycle on which the motorcycle fairing cover of the embodiment of the application is installed when running;

[0032] 1, motorcycle; 2, fairing main body; 3, edge strip main body; 4, negative angle of attack adjusting piece; 5, locking mechanism; 6, rotating shaft; 7, connecting rod; 8, angle of attack limiting mechanism; 9, shed vortex; 10, axis of the shed vortex. DETAILED DESCRIPTION

[0033] The terms "first", "second", "third", "fourth" and the like in the description and claims of the application and in the above drawings, are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the use of these terms in the description and the claims of the application is merely for distinguishing between the comparable objects and these terms can be replaced by other terms such as "one", "another", "at least one", "one or more" and / or the like without departing from the scope of the application. It is to be understood that the data so used in the description and the claims is merely for providing a certain proper understanding of the application and is not to be taken in a restrictive sense. For example, when the expression "comprising" is used in the description and the claims of the application, it is intended to cover the process, method, system, product, or apparatus which comprises the listed steps or units, and also includes those steps or units which do not clearly list, or those other steps or units which are inherent to the process, method, system, product, or apparatus. Further, the term "comprising" is intended to cover the process, method, system, product, or apparatus which comprises the listed steps or units, and also includes those steps or units which do not clearly list, or those other steps or units which are inherent to the process, method, system, product, or apparatus.

[0034] In the field of aerodynamics, the side strip is a narrow triangular shape of vortex lift device. Side strip is a concept from the aviation field, since the 80s of last century, aircraft and other aircraft are widely used in a kind of called aerodynamic side strip (or called side strip wing) aerodynamic layout. Such as the United States F-16 and F-18 fighter aircraft using the design of large side strip wing, side strip vortex lift is larger, significantly improve the air combat maneuverability of fighter.

[0035] The principle of side strip side strip vortex lift: in the case of side strip and airflow direction has angle of attack, airflow relative to the high speed movement of side strip, airflow along the leading edge of side strip, and before the axis to the rear of side strip. The airflow rotates, expands, and then in the rear of side strip, forming a vortex to the downstream, namely the vortex 9. At the preset angle of attack, the vortex 9 will produce vortex lift. Generally speaking, vortex lift is larger and more stable than the attached lift.

[0036] The embodiment of the application combines the latest theory of aerodynamics with the experience of vehicle wind tunnel test for many years, and designs the aerodynamic side strip used on the fairing of high-speed motorcycle, so that the high-speed maneuverability of motorcycle meets the requirements.

[0037] The embodiment of the application provides a motorcycle fairing, which comprises a fairing body 2 and two movable side strips, the two movable side strips are symmetrically installed on the two sides of the fairing body 2, and the movable side strips are movably connected with the fairing body 2, so that the movable side strips can change the negative angle of attack.

[0038] In the embodiment of the application, two movable side strips are arranged on the motorcycle fairing, the movable side strips interact with air to produce negative lift during the driving of the motorcycle, the force direction of the movable side strips is downward, so that the pressure and adhesion of the motorcycle wheels and the ground are increased under the action of the negative lift, and the stability and maneuverability of the motorcycle are improved. The movable side strips are movably connected with the fairing body 2, so that the negative lift can be flexibly adjusted.

[0039] The difference between negative lift and lift is that the component force of negative lift in the plumb direction is downward, and the component force of lift in the plumb direction is upward.

[0040] In combination with the vehicle test of the related manufacturers, starting from the results and theory of aerodynamics, the motorcycle fairing, the aerodynamic layout and the shape of the side strip of the embodiment of the application are designed through numerous aerodynamic wind tunnel tests. It has an attractive appearance, meets the law of aerodynamics, has high efficiency of negative vortex lift, small wind resistance during high-speed driving, and realizes automatic control and adjustment of negative angle of attack.

[0041] The motorcycle is a motor vehicle driving at high speed on the ground, and its performance requirements have very excellent control characteristics. For example Figure 1As shown, the overall shape of the prior art motorcycle is convex upward and flat downward, like a cross-sectional streamline shape of a wing placed in a positive direction. With the increase of the vehicle speed, the effect of the aerodynamic force will be very obvious. In addition to the superposition of the ground effect, the positive lift generated by the motorcycle will have an important influence on the adhesion of the motorcycle wheels, and even the phenomenon of wheel lift-off may occur in severe cases.

[0042] The solution to the problem is to eliminate or reduce the positive lift of the motorcycle at high speed, and to generate a negative lift. The effect of the negative lift is that the faster the motorcycle speed, the greater the negative lift generated by the vehicle. This also means that the negative lift acts downward on the motorcycle, increasing the pressure and adhesion of the wheels to the ground. The ground effect will also contribute to the negative lift. The negative lift is a reliable guarantee for the stable driving of the motorcycle at high speed. In particular, for two-wheeled motorcycles with relatively light mass and only two wheels in contact with the ground, the negative lift is very critical and important to the stability of the motorcycle.

[0043] The movable edge strip is a triangular edge strip. The shape of the edge strip body 3 is an elongated triangle, and the cross section of the edge strip body 3 is triangular or similar to a triangle, and the area of the cross section gradually increases from front to back, that is, the thickness of the edge strip body 3 continuously increases from front to back.

[0044] The embodiment of the application adds a movable edge strip capable of generating a negative lift to both sides of the head cover body. The movable edge strip can also be referred to as an edge strip device, a movable edge strip, an aerodynamic edge strip, an edge strip wing. The fairing head cover is carefully designed according to the aerodynamic characteristics. The fairing head cover mainly consists of an edge strip body 3, a negative angle of attack adjusting piece 4, a connecting rod 7, a locking mechanism 5, an angle of attack limiting mechanism 8, and a rotating shaft 6. The edge strip body 3 can also be referred to as an arc edge strip, and the negative angle of attack adjusting piece 4 can also be referred to as a negative angle of attack automatic adjusting piece. The locking mechanism 5 can also be referred to as a low-speed locking mechanism 5. The movable edge strip can also be referred to as an adjustable edge strip.

[0045] It should be noted that the negative angle of attack of the movable edge strip can be adjusted by using other negative angle of attack adjusting mechanisms in addition to using the negative angle of attack adjusting piece 4, which is not limited here.

[0046] For better illustration, an example is given below. The working process of the motorcycle fairing head cover of the embodiment of the application is as follows:

[0047] As shown in Figure 2 When the vehicle speed is less than 60 km / h, the locking mechanism 5 locks the movable edge strip on the fairing cover in a proper position to minimize the air resistance generated by the movable edge strip at low speed.

[0048] When the speed of the motorcycle is higher than 60 km / h, the locking mechanism 5 is unlocked under the action of wind pressure or under the driving of the electromagnet of the locking mechanism 5, and the negative lift effect of the edge strip begins to appear. The locking mechanism 5 can include a locking protrusion, which is driven by the electromagnet to protrude from the surface of the head cover body 2 when locked and is driven by the electromagnet to retract into the inside of the head cover body 2 when unlocked. When the locking protrusion protrudes from the surface of the head cover body 2, the edge strip body 3 is limited in the initial position, in which the negative angle of attack of the movable edge strip is the smallest. When the locking mechanism 5 is locked, the negative angle of attack of the movable edge strip is smaller than a preset angle, which can be 1 degree, 2 degrees, or 3 degrees, and can be determined according to actual production requirements. When the locking mechanism 5 is locked, the negative angle of attack of the movable edge strip is 0 degrees or as close to 0 degrees as possible.

[0049] It should be noted that the locking mechanism 5 and the angle of attack limiting mechanism 8 can be the same mechanism, which uses the same protrusion to limit the movement of the edge strip body 3 and the negative angle of attack adjusting piece 4. The angle of attack limiting mechanism 8 can also be a mechanism different from the locking mechanism 5. The angle of attack limiting mechanism 8 protrudes from the surface of the head cover body 2 and is used to limit the movement range of the negative angle of attack adjusting piece 4, so that the negative angle of attack of the movable edge strip does not exceed a preset maximum value.

[0050] The locking mechanism 5 includes an electromagnet, a spring, and a locking protrusion. When locked, the spring causes the locking protrusion to protrude from the surface of the head cover body 2, and when unlocked, the electromagnet attracts the locking protrusion to retract into the inside of the head cover body 2.

[0051] The locking mechanism 5 further includes a control circuit. The input end of the control circuit is connected to a motorcycle speed sensor, and the output end of the control circuit is connected to the electromagnet.

[0052] As shown in Figure 3 , the negative angle of attack adjusting piece 4 is a small wing mechanism. When the speed of the motorcycle increases, the lift of the negative angle of attack adjusting piece 4 increases. The wing mechanism rotates around the rotating shaft 6 under the action of the lift, and then the edge strip body changes different negative angles of attack under the driving of the connecting rod 7 connected to the negative angle of attack adjusting piece 4 and the edge strip body, thereby increasing the negative lift and improving the maneuverability and stability of the motorcycle. It should be noted that the numerical value is only an example and is not limiting.

[0053] The flow field of the detached vortex 9 formed by the movable edge strip is shown in Figure 4 for reference. The negative vortex lift is a kind of negative lift, and the negative vortex lift generated by the movable edge strip in the embodiment of the application can be referred to as negative lift. The fairing head cover can also be referred to as a motorcycle head cover.

[0054] As shown in Figure 5As shown, the embodiment of the application adopts the aircraft winglet technology in the aviation field, and successfully solves the problem of insufficient wheel adhesion and difficult control when the motorcycle is running at high speed. The edge strip aerodynamic layout can increase the vortex lift by 70%-80% compared with the ordinary airfoil mechanism under the same projection area, and the flow field is more stable. By reasonably controlling the negative angle of attack of the edge strip, a considerable downward pressure force can be generated. Because the negative angle of attack of the edge strip body is changed by the small negative angle of attack adjusting piece 4, as the vehicle speed increases, the negative angle of attack also increases, and the downward negative lift generated thereby also increases, thereby providing more safety for the motorcycle when running at high speed.

[0055] In the aviation field, the angle of attack refers to the angle between the projection of the aircraft speed direction line in the aircraft symmetry plane and the chord line of the wing. The angle of attack can also be called the angle of incidence or the angle of attack. In the embodiment of the application, the negative angle of attack of the movable edge strip refers to the angle between the chord line of the movable edge strip and the flow direction of the airflow, or the angle between the axis of the movable edge strip and the flow direction of the airflow, for example, the angle between the axis of the edge strip body and the flow direction of the airflow. When the motorcycle is running at high speed, the flow direction of the airflow can be considered as the opposite direction of the forward direction of the motorcycle. The value range of the negative angle of attack of the movable edge strip is 0-30 degrees, such as Figure 5 The negative angle of attack shown is 8 degrees. It should be noted that the numerical value is only an example and is not limited.

[0056] The edge strip body of the embodiment of the application is not fixed, but the angle of the edge strip body is controlled by the feedback of the negative angle of attack adjusting piece 4 as the vehicle speed continuously increases. This forms a good cycle that the faster the vehicle speed, the greater the downward pressure force, and thus the better the stability of the vehicle. The negative angle of attack adjusting piece 4 can also be called an airfoil adjusting piece.

[0057] The above embodiments are only used to illustrate the technical solutions of the application, but not to limit them; although the application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacements for part of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the application.

Claims

1. A motorcycle rectifier head cover characterized by, The helmet (1) comprises: a helmet body (2) and two movable side bars, which are symmetrically installed on two sides of the helmet body (2) and movably connected to the helmet body (2) so that the side bars can change the negative angle of attack; the side bars are triangular side bars, which can generate a vortex (9) acting on the side bars in a downward direction; the side bars comprise a side bar body (3) and a negative angle of attack adjusting piece (4); the negative angle of attack adjusting piece (4) is connected to the side bar body (3) so that the side bar body (3) can change the negative angle of attack under the action of the negative angle of attack adjusting piece (4); the negative angle of attack adjusting piece (4) is a wing surface mechanism so that the negative angle of attack adjusting piece (4) generates lift when moving relative to air; the side bars further comprise a connecting rod (7); the negative angle of attack adjusting piece (4) is connected to the side bar body (3) through the connecting rod (7) so that the negative angle of attack adjusting piece (4) drives the side bar body (3) to move.

2. The motorcycle headlamp housing of claim 1, wherein: the side bars further comprise a rotating shaft (6); the side bar body (3) is rotatably connected to the helmet body (2) through the rotating shaft (6).

3. The motorcycle headlamp housing of claim 1, wherein: the side bars further comprise a locking mechanism (5); the locking mechanism (5) is used to lock when the speed of the motorcycle is less than a preset speed, so that the side bars are fixed to the helmet body (2); the locking mechanism (5) is used to unlock when the speed of the motorcycle is greater than or equal to the preset speed, so that the side bars can move relative to the helmet body (2).

4. The motorcycle headlamp housing of claim 3, wherein: the locking mechanism (5) comprises an electromagnet, a spring and a locking protrusion; when locked, the spring makes the locking protrusion protrude from the surface of the helmet body (2); when unlocked, the electromagnet attracts the locking protrusion to retract into the inside of the helmet body (2).

5. The motorcycle headlamp housing of claim 4, wherein: the locking mechanism (5) further comprises a control circuit; an input end of the control circuit is connected to a motorcycle speed sensor, and an output end of the control circuit is connected to the electromagnet.

6. The motorcycle headlamp housing of claim 3, wherein: when the locking mechanism (5) is locked, the negative angle of attack of the side bars is less than a preset angle.

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