A motorcycle steering angle measuring device

Abstract

The present application relates to the technical field of measuring device, particularly relates to a motorcycle steering angle measuring device. The angle measuring assembly of the motorcycle steering angle measuring device is used for measuring the first steering angle of the front wheel of the motorcycle, the correction coefficient measuring assembly is used for measuring the correction coefficient when the front wheel is steered, and the correction coefficient is used for correcting the first steering angle; the first steering angle is corrected by using the correction coefficient, so that the obtained measurement steering angle data is more accurate, and the inaccurate measurement data caused by the movement of the contact point position of the front wheel and the ground during the measurement process is avoided.

Description

Technical Field

[0001] This invention relates to the field of measuring device technology, and in particular to a motorcycle steering angle measuring device. Background Technology

[0002] With increasingly fierce market competition, people are paying more and more attention to the quality of motorcycles. The range of the front wheel steering angle affects many parameters such as handling, steering angle, and safety. Therefore, before a motorcycle leaves the factory, the maximum left and right steering angle of its front wheel must meet national and industry standards and pass inspection before it can be shipped. Existing technology uses measuring devices to detect the steering angle of the motorcycle's front wheel, but these measuring devices have the drawback of inaccurate measurement. Summary of the Invention

[0003] In view of this, the present invention aims to provide a motorcycle steering angle measuring device to solve or partially solve the problem of inaccurate measurement in existing measuring devices.

[0004] To achieve the above objectives, the technical solution of the present invention is implemented as follows:

[0005] A motorcycle steering angle measuring device includes an angle measuring component and a correction coefficient measuring component. The angle measuring component measures a first steering angle of the motorcycle's front wheel, and the correction coefficient measuring component measures a correction coefficient when the front wheel is turning. The correction coefficient is used to correct the first steering angle. The correction coefficient measuring component includes a first light emitter and a first length scale. The first light emitter is fixedly connected to the motorcycle frame. A first light emitted obliquely downwards from the first light emitter illuminates the first length scale. Both the first light emitter and the first length scale are used to measure the correction coefficient. When the front wheel is in its initial position, the projection of the first light emitter onto the plane of the first length scale is the origin position. The angle between the line connecting the first light emitter and the origin position when the front wheel is in its initial position and the line connecting the first light emitter and the origin position after the front wheel has turned is the correction coefficient.

[0006] Furthermore, the formula for calculating the correction coefficient is as follows:

[0007]

[0008]

[0009] Wherein, fcw is the length change of the first light ray (11) illuminating the first length scale (7) when the front wheel (93) turns to the left; fccw is the length change of the first light ray (11) illuminating the first length scale (7) when the front wheel (93) turns to the right; h is the distance from the first light ray emitter (1) to the plane where the first length scale (7) is located; β is the angle between the first light ray (11) and the vertical direction; and η is the correction coefficient.

[0010] Furthermore, the angle measuring component includes a first measuring component and a second measuring component. The first measuring component is used to measure the second steering angle of the motorcycle handlebars, and the second measuring component is used to measure the third steering angle of the front wheel. When the difference between the second steering angle and the third steering angle is less than or equal to a second set value, the second steering angle or the third steering angle is the first steering angle.

[0011] Furthermore, the first measuring component includes a first rotating element and a first display element. The first rotating element is fixedly connected to the handlebar and is located on the rotation axis of the handlebar. The first rotating element rotates with the handlebar. The first display element displays the second steering angle of the first rotating element's rotation.

[0012] Furthermore, the first measuring component also includes a first fixing member, a first connecting rod, and a first suction cup; the first fixing member is located above the first rotating member and is rotatably connected to the first rotating member; the first display member is located above the first fixing member; one end of the first connecting rod is fixedly connected to the first fixing member, the other end of the first connecting rod is fixedly connected to the first suction cup, and the first suction cup is fixedly connected to the frame; when the first rotating member rotates with the handlebars, the first connecting rod keeps the first fixing member stationary relative to the frame, and the rotation angle of the first rotating member relative to the first fixing member is the second steering angle.

[0013] Furthermore, the second measuring component includes a second light emitter and an angle scale. The second light emitter is located on the front side of the front wheel and is fixedly connected to the front wheel. The second light emitted by the second light emitter coincides with the forward direction of the front wheel. The center of the angle scale is located at the contact point between the front wheel and the ground. When the front wheel rotates, the second light shines on the angle scale, and the angle scale displays the third steering angle.

[0014] Furthermore, the motorcycle steering angle measuring device also includes a third light emitter and a second length scale. The third light emitter is connected to the side wall of the front wheel. The third light emitted by the third light emitter is parallel to the line connecting the center of the front wheel and the center of the rear wheel of the motorcycle. The third light illuminates the second length scale, and the first length displayed by the second length scale is used to verify the position of the front wheel.

[0015] Furthermore, the motorcycle steering angle measuring device also includes a fourth light emitter, which is connected to the side wall of the rear wheel. The fourth light emitted by the fourth light emitter is parallel to the line connecting the center of the front wheel and the center of the rear wheel. The fourth light illuminates the second length scale, and the second length displayed on the second length scale is used to verify the position of the rear wheel.

[0016] Furthermore, a first magnetic part is provided in the middle of the second length scale, and a second magnetic part is provided in the middle of the angle scale. The second length scale is located outside the angle scale, and the first magnetic part and the second magnetic part are connected.

[0017] Furthermore, the first light emitter includes an infrared laser head; and / or, the second light emitter includes an infrared laser head; and / or, the third light emitter includes an infrared laser head; and / or, the fourth light emitter includes an infrared laser head.

[0018] Compared with existing technologies, the motorcycle steering angle measuring device of the present invention has the following advantages:

[0019] The motorcycle steering angle measuring device of the present invention, when measuring the steering angle of the front wheel of a motorcycle, in addition to using an angle measuring component to measure the first steering angle of the front wheel of the motorcycle, also uses a correction coefficient measuring component to measure the correction coefficient when the front wheel is steering, and uses the correction coefficient to correct the first steering angle, thereby making the obtained measured steering angle data more accurate, avoiding inaccurate measurement data caused by the movement of the contact point between the front wheel 93 and the ground during the measurement process.

[0020] The above description is merely an overview of the technical solution of the present invention. In order to better understand the technical means of the present invention and to implement it in accordance with the contents of the specification, and in order to make the above and other objects, features and advantages of the present invention more apparent and understandable, specific embodiments of the present invention are described below. Attached Figure Description

[0021] The accompanying drawings, which form part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0022] Figure 1 This is a schematic diagram of the structure of the motorcycle described in an embodiment of the present invention;

[0023] Figure 2 for Figure 1 A structural schematic diagram of the rear view of the motorcycle shown;

[0024] Figure 3 for Figure 2 The diagram shows the movement of the motorcycle as its front wheel rotates.

[0025] Figure 4 This is a schematic diagram of the top view of the motorcycle according to an embodiment of the present invention;

[0026] Figure 5 This is a partial structural schematic diagram of the first measuring component according to an embodiment of the present invention;

[0027] Figure 6 for Figure 1 The diagram shows a top view of the motorcycle.

[0028] Figure 7 The principle of calculating the correction factor is shown below. Figure 1 ;

[0029] Figure 8 The principle of calculating the correction factor is shown below. Figure 2 ;

[0030] Figure 9 The principle of calculating the correction factor is shown below. Figure 3 ;

[0031] Figure 10 The principle of calculating the correction factor is shown below. Figure 4 ;

[0032] Figure 11 The principle of calculating the correction factor is shown below. Figure 5 .

[0033] Explanation of reference numerals in the attached figures:

[0034] 1-First light emitter; 11-First light beam; 2-Second light emitter; 3-Third light emitter; 31-Third light beam; 4-Fourth light emitter; 41-Fourth light beam; 5-Second length scale; 6-Angle scale; 7-First length scale; 81-First rotating component; 82-First fixing component; 83-First display component; 84-First connecting rod; 85-First suction cup; 91-Frame; 92-Handlebars; 93-Front wheel; 94-Rear wheel; 95-Calibrating straight line. Detailed Implementation

[0035] It should be noted that, unless otherwise specified, the embodiments and features described in the present invention can be combined with each other.

[0036] In addition, the "front" and "rear" mentioned in the embodiments of the present invention refer to the front and rear relative to the forward direction of the motorcycle.

[0037] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0038] This application provides a motorcycle steering angle measuring device, including an angle measuring component and a correction coefficient measuring component. The angle measuring component is used to measure the first steering angle of the front wheel 93 of the motorcycle, and the correction coefficient measuring component is used to measure the correction coefficient when the front wheel 93 is turning. The correction coefficient measuring component includes a first light emitter 1 and a first length scale 7. The first light emitter 1 is fixedly connected to the motorcycle frame 91. The first light ray 11 emitted by the first light emitter 1 is obliquely downward and illuminates the first length scale 7. Both the first light emitter 1 and the first length scale 7 are used to measure the correction coefficient. When the front wheel 93 is in the initial position, the projection position of the first light emitter 1 onto the plane where the first length scale 7 is located is the origin position. The angle between the line connecting the first light emitter 1 and the origin position when the front wheel 93 is in the initial position and the line connecting the first light emitter 1 and the origin position after the front wheel 93 turns is the correction coefficient.

[0039] Specifically, the first light emitter 1 is fixedly connected to the frame 91. The specific fixing position can be set according to actual needs. For example, the first light emitter 1 can be fixed at the fuel tank of the frame 91 or at a protruding part on the side of the frame 91, so that the first light 11 can shine obliquely downward.

[0040] The front wheel 93 is in its initial position, i.e., when it is not turning. In this initial position, the angle between the first light ray 11 emitted obliquely downwards from the first light emitter 1 and the vertical direction is the first angle β. The height h from the first light emitter 1 to the plane containing the first length scale 7 is generally the ground. The motorcycle steering angle measuring device of this embodiment can measure the angle when the motorcycle is placed on the ground. The first angle β and height h need to be set according to the size and flatness of the site. For example, the height h of the first light emitter 1 can be relatively smaller when the flat area is large, and relatively larger when the area is uneven and limited. Similarly, the first angle β can be relatively larger when the flat area is large, and relatively smaller when the area is uneven and limited. The first angle β and the height h of the first light emitter 1 must ensure that the scale change value of the first length scale 7 can be clearly read.

[0041] The height h of the first light emitter 1 can also be measured using a first length ruler 7. For example, when the front wheel 93 is in the initial position, after the first length ruler 7 measures the height of the first light emitter 1, it is placed on the ground for the first light 11 emitted obliquely downward from the first light emitter 1 to illuminate it. The changes in the position of the first light 11 illuminating the first length ruler 7 are measured when the front wheel 93 is in the initial position and after the front wheel 93 turns.

[0042] In this embodiment, the first light beam 11 shines obliquely downwards. When the front wheel 93 is not turning, the position of the first light beam 11 is referenced. Figure 2 As shown, when the front wheel 93 turns clockwise and counterclockwise, the frame 91 will tilt to a certain extent, causing the position of the first light ray 11 illuminating the first length scale 7 to change. That is, the position of the first light ray 11 illuminating the first length scale 7 changes, and this change value can be used to calculate the correction coefficient.

[0043] Reference Figure 2 As shown, the first light emitter 1 is fixed to the side of the frame 91 to avoid the influence of other structures on the frame 91 on the propagation of the first light 11, and to ensure that the first light 11 can clearly and accurately illuminate the first length scale 7.

[0044] Furthermore, the correction coefficient can be calculated based on the Pythagorean theorem. This application does not specifically limit the calculation process, but the calculation procedure is as follows:

[0045] Reference Figure 7 The diagram illustrates the calculation principle of the correction factor. Figure 7 for Figure 2 The diagram shown is a simplified representation of the structure when the front wheel 93 is in its initial position. Figure 8 for Figure 3 The diagram shown is a simplified representation of the front wheel 93 steering structure.

[0046] When the front wheels are in their initial position (93), that is, when the front wheels are not turning, refer to... Figure 9 As shown, the first light emitter 1 is located at point B.

[0047] The height of point B is h, and the angle between the first ray 11 and the vertical direction is the first angle β.

[0048] We can determine the length of OA using trigonometric functions: OA = tanβ * h.

[0049] When the front wheel 93 turns to the right, the motorcycle leans to the right (reference). Figure 10 As shown.

[0050] Since the rotation is centered at point O, OD = OB = h, ∠OBA = ∠ODC = β;

[0051] The correction factor is ∠BOD, ∠BOD is η, and ∠DOC = π / 2 – η

[0052] According to the sine theorem in trigonometric functions, a / sinα = b / sinβ = 2R.

[0053] Given OD, ∠ODC, and ∠DOC, then:

[0054]

[0055] Because ∠DCO=π-∠ODC-∠DOC=π–β–π / 2–η, so

[0056]

[0057] As shown in the diagram, AC = OA – OC, where AC is the offset fcw of the first ray 11 when the motorcycle leans to the right.

[0058]

[0059] When the front wheel 93 turns to the left, the motorcycle leans to the left (reference). Figure 11 As shown.

[0060] Referring to the derivation process above, in triangle ΔOFE,

[0061]

[0062]

[0063] As shown in the diagram, AE = OE – OA, where AE is the fccw of the first ray 11 when the motorcycle leans to the left.

[0064]

[0065] Since AC and AE can be read directly from the first length scale 7, η and η′ can be calculated, and η and η′ are correction coefficients.

[0066] In this embodiment of the application, the correction coefficient is used to correct the first steering angle. The correction method in this embodiment of the application is to add the correction coefficient and the first steering angle, that is, the sum of the first steering angle and the correction coefficient is the front wheel steering angle of the motorcycle measured by the motorcycle steering angle measuring device.

[0067] The first light emitter 1 and the frame 91 can be connected by magnetic attraction, that is, the first light emitter 1 is provided with a first magnetic component, which is attracted to the frame 91 by the first magnetic component. This connection method has the advantage of simple operation.

[0068] When using the motorcycle steering angle measuring device of this application embodiment to measure the steering angle of the front wheel 93 of a motorcycle, in addition to using the angle measuring component to measure the first steering angle of the front wheel 93 of the motorcycle, the correction coefficient measuring component is also used to measure the correction coefficient when the front wheel 93 is steering. The first steering angle is corrected by the correction coefficient, so that the obtained measured steering angle data is more accurate and avoids inaccurate measurement data caused by the movement of the contact point between the front wheel 93 and the ground during the measurement process.

[0069] Furthermore, when the motorcycle steering angle measuring device measures the steering of the front wheel 93, if the position change of the first light ray 11 illuminating the first length scale 7 is less than or equal to the first set value, a correction coefficient is calculated. If the position change of the first light ray 11 illuminating the first length scale 7 is greater than the first set value, the measurement process error is too large, the test result is invalid, and retesting is required.

[0070] The first setting value can be set according to usage requirements, and this application embodiment does not specifically limit it. For example, the first setting value is 10mm.

[0071] In one embodiment, the angle measuring component includes a first measuring component and a second measuring component. The first measuring component is used to measure a second steering angle of the motorcycle handlebars 92, and the second measuring component is used to measure a third steering angle of the front wheel 93. When the difference between the second steering angle and the third steering angle is less than or equal to a second set value, the second steering angle or the third steering angle is the first steering angle.

[0072] It is understood that the handlebars 92 and the front wheel 93 rotate simultaneously, and their rotation angles are the same. When the difference between the second and third steering angles is less than the second set value, the test result is valid. In this case, the second and third steering angles can be selected as the first steering angle according to usage requirements or regulations. When the difference between the second and third steering angles is greater than the second set value, the test result has a large error and is invalid. In the event of an invalid test result, retesting is required. The first and second measuring components can be mutually calibrated, thereby making the measured steering angle data more accurate.

[0073] Reference Figure 4 and Figure 5 As shown, in one embodiment, the first measuring component includes a first rotating member 81 and a first display member 83. The first rotating member 81 is fixedly connected to the handlebar 92 and is located on the rotation axis of the handlebar 92. The first rotating member 81 rotates with the handlebar 92. The first display member 83 displays the second steering angle of the rotation of the first rotating member 81.

[0074] The first rotating component 81 is located on the rotation axis of the handlebar 92. When the handlebar 92 rotates, the first rotating component 81 rotates with the handlebar 92 and rotates at the same angle. The rotation angle of the first rotating component 81 is the second steering angle of the handlebar 92. The first display component 83 displays the second steering angle, making the reading simple and convenient.

[0075] Reference Figure 4 and Figure 5 As shown, in one embodiment, the first measuring component further includes a first fixing member 82, a first connecting rod 84, and a first suction cup 85; the first fixing member 82 is located above the first rotating member 81 and is rotatably connected to the first rotating member 81; the first display member 83 is located above the first fixing member 82; one end of the first connecting rod 84 is fixedly connected to the first fixing member 82, and the other end of the first connecting rod 84 is fixedly connected to the first suction cup 85, and the first suction cup 85 is fixedly connected to the frame 91; when the first rotating member 81 rotates with the handlebar 92, the first connecting rod 84 keeps the first fixing member 82 stationary relative to the frame 91, and the rotation angle of the first rotating member 81 relative to the first fixing member 82 is the second steering angle.

[0076] Reference Figure 4 and Figure 5 As shown, the first display element 83 is located above the first fixing element 82, and the first fixing element 82 is located above the first rotating element 81. The first rotating element 81 is fixedly connected to the handlebar 92. In practical applications, the first rotating element 81 and the first fixing element 82 can be rotatably connected in various ways. For example, the first rotating element 81 can be connected to the first fixing element 82 via a rotating shaft or other rotatable component. The first connecting rod 84 keeps the first fixing element 82 stationary relative to the frame 91, meaning the first fixing element 82 does not rotate with the first rotating element 81. During the rotation of the first rotating element 81 with the handlebar 92, a relative rotation occurs between the first rotating element 81 and the first fixing element 82. The first display element 83 displays the relative rotation angle between the first rotating element 81 and the first fixing element 82, which is the second steering angle.

[0077] It is understood that this application does not specifically limit the first display element 83, for example, the first display element 83 is a display screen with an angle.

[0078] In practical applications, the first measuring component is an independent measuring unit that measures the second steering angle of the handlebar 92 separately. The first measuring component can be selected from existing technologies. For example, the first measuring component can be equipped with a portable power source for power supply, such as using a battery. Relative rotation occurs between the first rotating member 81 and the first fixed member 82, causing a change in the resistance of the sliding rheostat within the first measuring component, resulting in a voltage change. The voltage is calibrated with the second steering angle, and the second steering angle is displayed on the first display member 83.

[0079] Understandably, in practical applications, the first measuring component has a zero-reset function, which is convenient for the front wheel 93 and rear wheel 94 of the motorcycle to be aligned and zeroed.

[0080] In one embodiment, the first rotating member 81 is attached to the handlebar 92 by adhesive bonding or by using a connecting fixture to fix it to the handlebar 92.

[0081] Using the first suction cup 85 to fix it to the frame 91 has the advantages of simple and convenient connection. The specific structure of the first suction cup 85 can be selected according to the usage requirements, and this application embodiment does not limit it.

[0082] Reference Figure 6 As shown, in one embodiment, the second measuring component includes a second light emitter 2 and an angle scale 6. The second light emitter 2 is located on the front side of the front wheel 93 and is fixedly connected to the front wheel 93. The second light emitted by the second light emitter 2 coincides with the forward direction of the front wheel 93. The center of the angle scale 6 is located at the contact point between the front wheel 93 and the ground. When the front wheel 93 rotates, the second light shines on the angle scale 6, and the angle scale 6 displays the third steering angle.

[0083] As the front wheel 93 rotates, the direction of the second light emitter 2 remains aligned with the forward direction of the front wheel 93. This makes the reading on the angle scale 6 where the second light shines the third steering angle of the front wheel 93. The operator can quickly read the third steering angle through the angle scale 6.

[0084] Reference Figure 1 and Figure 6 As shown, in one embodiment, the motorcycle steering angle measuring device further includes a third light emitter 3 and a second length scale 5. The third light emitter 3 is connected to the side wall of the front wheel 93. The third light 31 emitted by the third light emitter 3 is parallel to the line connecting the center of the front wheel 93 and the center of the rear wheel 94 of the motorcycle. The third light 31 illuminates the second length scale 5. The first length displayed by the second length scale 5 is used to verify the position of the front wheel 93.

[0085] When the motorcycle is not turning, the third ray 31 illuminates the position on the second length scale 5, displaying the first length. When the front wheel 93 completes the turn and returns to the forward position, the third ray 31 should illuminate the first length again to ensure that the contact point between the front wheel 93 and the ground has not moved, thus ensuring accurate measurement results. If the contact point between the front wheel 93 and the ground has moved, the front wheel 93 needs to be moved back to the initial contact point position with the ground, and the measurement needs to be repeated to ensure accurate measurement results.

[0086] Reference Figure 1 and Figure 6As shown, in one embodiment, the motorcycle steering angle measuring device further includes a fourth light emitter 4, which is connected to the side wall of the rear wheel 94. The fourth light 41 emitted by the fourth light emitter 4 is parallel to the line connecting the center of the front wheel 93 and the center of the rear wheel 94. The fourth light 41 illuminates a second length scale 5, and the second length displayed by the second length scale 5 is used to verify the position of the rear wheel 94.

[0087] When the motorcycle is not turning, the fourth ray 41 illuminates the position of the second length scale 5, displaying the second length. When the front wheel 93 completes the turn and returns to the forward position, the fourth ray 41 should illuminate the second length again to ensure that the contact point between the front wheel 93 and the ground has not moved and the frame 91 has not shifted, thus ensuring accurate measurement results. If the contact point between the front wheel 93 and the ground has moved, the front wheel 93 needs to be moved back to the initial contact point position with the ground, and the measurement needs to be repeated to ensure accurate measurement results.

[0088] In this embodiment, the positions of the front wheel 93 and the rear wheel 94 are verified using the third light emitter 3 and the fourth light emitter 4, thereby verifying the position of the motorcycle. This method has the advantage of being simple and effectively ensures the accuracy of the data during the measurement of the steering angle of the front wheel 93.

[0089] In one embodiment, the third light emitter 3 further includes a third magnetic element, which is attached to the rim surface of the front wheel 93. This connection method has the advantages of being simple and convenient.

[0090] In one embodiment, the fourth light emitter 4 further includes a fourth magnetic element, which is attached to the rim surface of the rear wheel 94. This connection method is simple and convenient.

[0091] In one embodiment, a first magnetic part is provided in the middle of the second length scale 5, a second magnetic part is provided in the middle of the angle scale 6, the second length scale 5 is located outside the angle scale 6, and the first magnetic part and the second magnetic part are connected.

[0092] The arrangement of the first and second magnetic parts allows the second length scale 5 and the angle scale 6 to be easily and conveniently connected, and ensures that the positions of the second length scale 5 and the angle scale 6 are relatively fixed, thereby effectively ensuring the accuracy of the data during the measurement of the front wheel 93 steering angle.

[0093] In one embodiment, the second length scale 5 is a folding scale that can be folded in half at both ends, with a first magnetic part provided at the fold; the angle scale 6 is also a folding scale that can be folded in half at both ends, with a second magnetic part provided at the fold. The above-described structures of the second length scale 5 and the angle scale 6 have the advantage of being easy to carry.

[0094] In one embodiment, the first light emitter 1 includes an infrared laser head; and / or, the second light emitter 2 includes an infrared laser head; and / or, the third light emitter 3 includes an infrared laser head; and / or, the fourth light emitter 4 includes an infrared laser head.

[0095] The infrared laser head emits a strong, directional beam of light. The output port of the infrared laser head can be adjusted to point or line, and the linear width and beam color (e.g., red, yellow, blue) can be adjusted to meet usage requirements for the first, second, third, and fourth beams (11, 31, and 41). It is understood that the first, second, third, and fourth beams (11, 31, and 41) all have the characteristic of propagating along a specific path, enabling rapid and clear data reading.

[0096] The motorcycle steering angle measuring device in this embodiment of the application, in addition to using an angle measuring component to measure the first steering angle of the front wheel 93 of the motorcycle, also uses a correction coefficient measuring component to measure the correction coefficient when the front wheel 93 is turning. This correction coefficient is used to correct the first steering angle, thereby making the obtained steering angle measurement data more accurate. Furthermore, the angle measuring component includes a first measuring component and a second measuring component. The accurate first steering angle is obtained by verifying the data between the first and second measuring components. The motorcycle's position is verified using a third light emitter 3, a second length scale 5, and a fourth light emitter 4. Through the above structure, the motorcycle steering angle measuring device makes the measured steering angle data more accurate, while reducing the cost of testing equipment. It also has a relatively simple structure, is easy to move, occupies a small area, and has a wider range of applications.

[0097] The testing process using a motorcycle steering angle measuring device is as follows:

[0098] Reference Figure 6 As shown, a calibration straight line 95 is set on a flat ground.

[0099] Place the motorcycle under test on a flat surface. Use a jack or the jack that comes with the motorcycle to balance the rear wheel 94 and lift the motorcycle to ensure that the motorcycle does not move and that the motorcycle is balanced. Make sure that the projection of the line connecting the center of the front wheel 93 and the center of the rear wheel 94 on the ground coincides with the calibration line 95.

[0100] Install the first measuring component, fix the first rotating part 81 to the handlebar 92, connect the first suction cup 85 to the motorcycle's fuel tank, and set the first measuring component to zero so that the first display part 83 displays zero.

[0101] Install the first light emitter 1, the second light emitter 2, the third light emitter 3, and the fourth light emitter 4. Install the first length scale 7, the angle scale 6, and the second length scale 5. The first light 11 emitted by the first light emitter 1 illuminates the first length scale 7. The second light emitted by the second light emitter 2 coincides with the calibration line 95. The third light 31 emitted by the third light emitter 3 and the fourth light 41 emitted by the fourth light emitter 4 are both parallel to the calibration line 95. At this time, the distance between the third light 31 and the fourth light 41 is 0.5*(ba), where b is the width of the rear wheel 94 and a is the width of the front wheel 93.

[0102] Rotate the front wheel 93 degrees clockwise or counterclockwise to its maximum angle, then read the second and third steering angles. Compare the second and third steering angles to obtain the first steering angle. Obtain the position change value of the first ray through the first length scale 7, and according to the formula...

[0103]

[0104]

[0105] The correction system η is obtained, and the measured steering angle of the front wheel 93 is the sum of the first steering angle and the correction coefficient η.

[0106] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A motorcycle steering angle measuring device, characterized in that, It includes an angle measuring component and a correction coefficient measuring component; the angle measuring component is used to measure the first steering angle of the front wheel (93) of the motorcycle, and the correction coefficient measuring component is used to measure the correction coefficient when the front wheel (93) is steering, and the steering angle of the front wheel (93) of the motorcycle is the sum of the correction coefficient and the first steering angle; The correction coefficient measuring component includes a first light emitter (1) and a first length scale (7). The first light emitter (1) is fixedly connected to the frame (91) of the motorcycle. The first light ray (11) emitted obliquely downwards from the first light emitter (1) illuminates the first length scale (7). Both the first light emitter (1) and the first length scale (7) are used to measure the correction coefficient. The motorcycle steering angle measuring device measures the steering angle when the motorcycle is placed on the plane where the first length scale (7) is located. Wherein, when the front wheel (93) is in the initial position, the projection position of the first light emitter (1) onto the plane where the first length scale (7) is located is the origin position; the angle between the line connecting the first light emitter (1) and the origin position when the front wheel (93) is in the initial position and the line connecting the first light emitter (1) and the origin position after the front wheel (93) turns is the correction coefficient.

2. The motorcycle steering angle measuring device according to claim 1, characterized in that, The formula for calculating the correction factor is: Wherein, fcw is the length change value of the first light ray (11) illuminating the first length scale (7) when the front wheel (93) turns to the left; fccw is the length change value of the first light ray (11) illuminating the first length scale (7) when the front wheel (93) turns to the right; fcw and fccw are data directly read from the first length scale (7); h is the distance from the first light ray emitter (1) to the plane where the first length scale (7) is located when the front wheel (93) is in the initial position; β is the angle between the first light ray (11) and the vertical direction when the front wheel (93) is in the initial position; η and η′ are correction coefficients.

3. The motorcycle steering angle measuring device according to claim 1, characterized in that, The angle measuring component includes a first measuring component and a second measuring component. The first measuring component is used to measure the second steering angle of the handlebars (92) of the motorcycle, and the second measuring component is used to measure the third steering angle of the front wheel (93). When the difference between the second steering angle and the third steering angle is less than or equal to a second set value, the second steering angle or the third steering angle is the first steering angle.

4. The motorcycle steering angle measuring device according to claim 3, characterized in that, The first measuring component includes a first rotating element (81) and a first display element (83). The first rotating element (81) is fixedly connected to the handlebar (92) and is located on the rotation axis of the handlebar (92). The first rotating element (81) rotates with the handlebar (92). The first display element (83) displays the second steering angle of the first rotating element (81) rotation.

5. The motorcycle steering angle measuring device according to claim 4, characterized in that, The first measuring component further includes a first fixing member (82), a first connecting rod (84), and a first suction cup (85); the first fixing member (82) is located above the first rotating member (81) and is rotatably connected to the first rotating member (81); the first display member (83) is located above the first fixing member (82); one end of the first connecting rod (84) is fixedly connected to the first fixing member (82), the other end of the first connecting rod (84) is fixedly connected to the first suction cup (85), and the first suction cup (85) is fixedly connected to the vehicle frame (91); When the first rotating member (81) rotates with the handlebar (92), the first connecting rod (84) keeps the first fixing member (82) stationary relative to the frame (91), and the rotation angle of the first rotating member (81) relative to the first fixing member (82) is the second steering angle.

6. The motorcycle steering angle measuring device according to claim 3, characterized in that, The second measuring component includes a second light emitter (2) and an angle scale (6). The second light emitter (2) is located on the front side of the front wheel (93) and is fixedly connected to the front wheel (93). The second light emitted by the second light emitter (2) coincides with the forward direction of the front wheel (93). The center of the angle scale (6) is located at the contact point between the front wheel (93) and the ground. When the front wheel (93) rotates, the second light shines on the angle scale (6), which displays the third steering angle.

7. The motorcycle steering angle measuring device according to claim 6, characterized in that, The motorcycle steering angle measuring device also includes a third light emitter (3) and a second length scale (5). The third light emitter (3) is connected to the side wall of the front wheel (93). The third light ray (31) emitted by the third light emitter (3) is parallel to the line connecting the center of the front wheel (93) and the center of the rear wheel (94) of the motorcycle. The third light ray (31) illuminates the second length scale (5). The first length displayed by the second length scale (5) is used to verify the position of the front wheel (93).

8. The motorcycle steering angle measuring device according to claim 7, characterized in that, The motorcycle steering angle measuring device also includes a fourth light emitter (4), which is connected to the side wall of the rear wheel (94). The fourth light ray (41) emitted by the fourth light emitter (4) is parallel to the line connecting the center of the front wheel (93) and the center of the rear wheel (94). The fourth light ray (41) illuminates the second length scale (5), and the second length displayed by the second length scale (5) is used to verify the position of the rear wheel (94).

9. The motorcycle steering angle measuring device according to claim 7, characterized in that, The second length scale (5) has a first magnetic part in the middle, and the angle scale (6) has a second magnetic part in the middle. The second length scale (5) is located outside the angle scale (6), and the first magnetic part and the second magnetic part are connected.

10. The motorcycle steering angle measuring device according to claim 8, characterized in that, The first light emitter (1) includes an infrared laser head; and / or, The second light emitter (2) includes an infrared laser head; and / or, The third light emitter (3) includes an infrared laser head; and / or, The fourth light emitter (4) includes an infrared laser head.

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