A vibration reduction arrangement method and motorcycle

Abstract

This invention discloses a vibration reduction arrangement method and a motorcycle, relating to the field of motorcycles. The motorcycle includes an engine and a bracket connecting the engine and the frame. The arrangement method includes the following steps: S1, analyzing the forces acting on the rear wheel of the motorcycle during its movement and establishing a force balance equation; S2, calculating the influencing factors of the bracket's support force on the engine based on the force balance equation; S3, adjusting the arrangement of the engine assembly based on the influencing factors to make the bracket's support force on the engine approach zero. This application, through this arrangement method, effectively minimizes the support force of the bracket on the engine, thereby minimizing the deformation of the engine buffer sleeve, bracket buffer sleeve, and bracket limiting rubber, resulting in stronger vibration absorption capacity and reducing vibration in various parts of the entire vehicle. The motorcycle disclosed in this invention uses the above-mentioned vibration reduction arrangement method to arrange the engine assembly and rear shock absorber of the motorcycle.

Description

Technical Field

[0001] This invention relates to the technical field of motorcycles, and more specifically, to an arrangement method for reducing vibration. The invention also relates to a motorcycle in which the engine assembly and rear shock absorber are arranged using the aforementioned vibration-reducing arrangement method. Background Technology

[0002] In existing single-cylinder scooter motorcycles without a balance shaft, there are many arrangements where the front mounting point of the engine is connected to the frame via a bracket, and the rear of the engine is connected to the rear of the frame via a shock absorber. However, due to the unbalanced force generated by the crankshaft piston when the single-cylinder engine without a balance shaft is running, most single-cylinder scooter motorcycles without a balance shaft have a problem with large vibrations, and the vibration problem is not easy to solve.

[0003] Existing solutions to the vibration problem are limited, and can be broadly categorized as follows: 1. Reduce the stiffness of the damper sleeve at the engine mounting point; 2. Reduce the stiffness of the bracket damper sleeve; 3. Adjust the frame structure; 4. Add damper rubber to the footpegs or seat to improve vibration at these locations; 5. Improve handlebar vibration by adjusting the handlebar tubes. All of these solutions have limitations and their effectiveness is not significant. For example, solutions one and two reduce vibration along the path from the excitation source to the rider, improving vibration in various parts of the vehicle, but the effect is relatively minor. Solutions three, four, and five can only locally improve vibration in a specific location, offering no improvement to other areas and increasing the overall cost of the vehicle.

[0004] In conclusion, how to reduce vibration in various parts of a vehicle without increasing the overall vehicle cost is a problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0005] In view of this, the purpose of the present invention is to provide an arrangement method for reducing vibration, which reduces the vibration of various parts of the vehicle by reducing the force on the bracket.

[0006] Another object of the present invention is to provide a motorcycle in which the engine assembly and rear shock absorber are arranged using the above-described vibration reduction arrangement method.

[0007] To achieve the above objectives, the present invention provides the following technical solution:

[0008] A vibration reduction arrangement method is applied to a motorcycle, the motorcycle including an engine and a bracket connecting the engine and the frame;

[0009] The arrangement method includes:

[0010] S1. Analyze the forces acting on the rear wheel of the motorcycle based on its state during motion and establish the force balance equations.

[0011] S2. Analyze the influencing factors of the support force of the bracket on the engine based on the force balance equation;

[0012] S3. Adjust the arrangement of the engine assembly according to the influencing factors so that the support force of the bracket on the engine tends to 0.

[0013] Preferably, the force analysis in step S1 specifically includes:

[0014] With the center of the rear wheel as point O, the compressive force of the rear shock absorber is F1, the ground support force is F2, the support force of the bracket on the engine is F3, and the weight of the engine assembly is G.

[0015] The engine assembly includes an engine, a rear wheel, and related accessories mounted on the engine and the rear wheel.

[0016] Preferably, in step S1, the force balance equations include:

[0017] Horizontal direction: F1 X =F3 X ;

[0018] Vertical direction: F1 Y + G =F3 Y + F2.

[0019] Preferably, step S2 specifically includes:

[0020] By measuring the parameters F1, F2, and G, and based on the force balance equation, the magnitude of the supporting force of the bracket on the engine can be obtained as: F3 2 =F3 X 2 + F3 Y 2 ;

[0021] Taking the moment at point 0, we can calculate the torque as follows: F1·L1 + F3·L3 = G·L2.

[0022] Preferably, step S3 specifically includes:

[0023] By adjusting the value of F1·L1, the value of F3 is reduced and approaches 0, thereby minimizing the deformation at the engine buffer sleeve and bracket buffer sleeve.

[0024] Preferred options also include:

[0025] S4. During the operation of the engine, the unbalanced force generated by the crankshaft piston is analyzed and a force diagram is established. Based on the analysis results, the installation angle between the engine and the bracket is adjusted to reduce the vibration caused by the unbalanced force of the engine.

[0026] Preferably, step S4 specifically includes:

[0027] The unbalanced forces generated by the crankshaft piston during engine operation are analyzed and a force diagram is established.

[0028] Determine the magnitude of the unbalanced force at different locations based on the force diagram.

[0029] Let point A be the mounting point between the bracket and the frame, and point B be the mounting point between the bracket and the engine. Arrange the line connecting points A and B perpendicular to the position where the unbalanced force is greater.

[0030] A motorcycle in which the engine assembly and rear shock absorber are arranged using a vibration reduction arrangement method as described in any of the preceding claims.

[0031] The vibration reduction arrangement method provided by the present invention includes the following steps: S1, performing force analysis on the rear wheel of the motorcycle during the motorcycle's movement and establishing a force balance equation; S2, calculating the influencing factors of the bracket's support force on the engine based on the force balance equation; S3, adjusting the arrangement of the engine assembly based on the influencing factors so that the support force of the bracket on the engine tends to 0.

[0032] The vibration reduction arrangement method provided in this application effectively minimizes the support force of the bracket on the engine, thereby minimizing the deformation of the engine buffer sleeve, bracket buffer sleeve, and bracket limiting rubber, resulting in stronger vibration absorption capacity and ultimately reducing vibration in various parts of the vehicle. The motorcycle disclosed in this invention employs the aforementioned vibration reduction arrangement method for arranging the engine assembly and rear shock absorber. Attached Figure Description

[0033] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0034] Figure 1 This is a schematic diagram of the motorcycle arrangement in this embodiment;

[0035] Figure 2 This is a schematic diagram of the force analysis in this embodiment;

[0036] Figure 3 This is a schematic diagram of the unbalanced force relationship in this embodiment;

[0037] Figure 4 This is a force diagram of the unbalanced force in this embodiment.

[0038] Figures 1-4 In the accompanying drawings, the reference numerals include:

[0039] 1. Rear wheel; 2. Engine; 3. Bracket; 4. Rear shock absorber. Detailed Implementation

[0040] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0041] Unless otherwise defined, the technical or scientific terms used in this application shall have the ordinary meaning understood by one of ordinary skill in the art to which this invention pertains. The terms "first," "second," and similar terms used in this invention do not indicate any order, quantity, or importance. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships; these relative positional relationships may change accordingly when the absolute position of the described object changes. This application discloses an arrangement method for reducing vibration and a motorcycle.

[0042] The core of this invention is to provide an arrangement method that reduces vibration.

[0043] Another core aspect of this invention is to provide a motorcycle in which the engine assembly and rear shock absorber are arranged using the above-described vibration reduction arrangement method.

[0044] Please refer to Figures 1 to 4 .

[0045] The vibration reduction arrangement method provided by the present invention is applied to a motorcycle, which includes an engine 2 and a bracket 3 connected between the engine 2 and the frame.

[0046] Arrangement methods include:

[0047] S1. Analyze the forces acting on the rear wheel 1 of the motorcycle based on its state during motion, and establish the force balance equation.

[0048] S2. Analyze the influencing factors of the support force of bracket 3 on engine 2 based on the force balance equation;

[0049] S3. Adjust the layout of the engine assembly according to the influencing factors so that the support force of the bracket 3 on the engine 2 tends to be 0.

[0050] Specifically, simulating a motorcycle operating with one driver, the rear wheel assembly 1 is balanced by gravity, the thrust of the rear shock absorber 4, the ground support force, and the support force at the bracket 3 when the engine 2 is connected to the frame via the bracket 3 at the front mounting point. The greater the support force at the bracket 3, the more significantly the unbalanced force generated by the engine 2 is transmitted to various parts of the driver's body through the bracket 3. Therefore, force analysis of the rear wheel 1 and establishment of relevant force balance equations facilitate subsequent analysis. Based on the force balance equations, the influencing factors of the support force of the bracket 3 on the engine 2 are calculated. Based on these influencing factors, the arrangement of the engine assembly is adjusted to make the support force of the bracket 3 on the engine 2 approach zero, thereby minimizing the deformation of the engine 2 buffer sleeve, the bracket 3 buffer sleeve, and the bracket 3 limiting rubber, maximizing vibration absorption capacity, and ultimately reducing vibration in all parts of the vehicle.

[0051] The above-mentioned vibration reduction arrangement effectively minimizes the support force of the bracket 3 on the engine 2, thereby minimizing the deformation of the engine 2 buffer sleeve, the bracket 3 buffer sleeve, and the bracket 3 limiting rubber, resulting in a stronger vibration absorption capacity and thus reducing the vibration of various parts of the vehicle.

[0052] The vibration reduction arrangement method provided by the present invention will be described in more detail below with reference to the accompanying drawings and specific embodiments.

[0053] In one specific implementation, reference is made to... Figure 1 and Figure 2 The force analysis in step S1 specifically includes: taking the center of the rear wheel 1 as the 0 point, the compressive force of the rear shock absorber 4 as F1, the ground support force as F2, the support force of the bracket 3 on the engine 2 as F3, and the weight of the engine assembly as G; the engine assembly includes the engine 2, the rear wheel 1, and related accessories mounted on the engine 2 and the rear wheel 1.

[0054] Specifically, since the rear wheel assembly 1 is balanced by gravity, the thrust of the rear shock absorber 4, the support force of the ground, and the support force at bracket 3, the force analysis is performed with the center of the rear wheel 1 as point 0.

[0055] Based on any of the above embodiments, refer to Figure 1 and Figure 2 In step S1, the force balance equations include:

[0056] Horizontal direction: F1 X =F3X ;

[0057] Vertical direction: F1 Y + G =F3 Y + F2.

[0058] in,

[0059] F1: The compressive force of the rear shock absorber;

[0060] F2: Support force from the bottom surface:

[0061] F3: Support force of the bracket on the engine;

[0062] G: The weight of the engine assembly;

[0063] Point O: Center of the rear wheel

[0064] Based on any of the above embodiments, refer to Figure 1 and Figure 2 Step S2 specifically includes: measuring the above parameters F1, F2, and G; and obtaining the magnitude of the support force of the bracket on the engine according to the above force balance equation: F3 2 =F3 X 2 +F3 Y 2 The torque calculation for taking the moment at point 0 yields: F1·L1 + F3·L3 = G·L2.

[0065] Based on any of the above embodiments, refer to Figure 1 and Figure 2 Step S3 specifically includes: adjusting the value of F1·L1 to reduce the value of F3 and make it approach 0, thereby minimizing the deformation at the buffer sleeve of engine 2 and the buffer sleeve of bracket 3.

[0066] Specifically, analysis revealed that in the above arrangement, the direction of F1 (compression force of rear shock absorber 4) needs to be positioned behind the center of rear wheel 1. By adjusting the value of F1·L1, F3 (support force of bracket 3 on engine 2) can be reduced or approached to 0. Through balance calculations, F3 (support force of bracket 3 on engine 2) can be made to approach 0 when there is a driver, minimizing the deformation at the buffer sleeve of engine 2 and the buffer sleeve of bracket 3, thereby reducing the vibration of various parts of the vehicle.

[0067] In one specific embodiment provided in this application, reference is made to Figure 3 and Figure 4The arrangement method for reducing vibration provided by the present invention further includes: S4, analyzing the unbalanced force generated by the crankshaft piston during the operation of the engine 2 and establishing a force diagram, and adjusting the installation angle between the engine 2 and the bracket 3 according to the analysis results to reduce the vibration caused by the unbalanced force of the engine 2.

[0068] Specifically, in the single-cylinder engine 2 without a balance shaft, the unbalanced force generated by the crankshaft piston during operation is the main cause of vibration, and this unbalanced force will always exist. Therefore, it is necessary to change the direction of the unbalanced force to reduce the vibration caused by the unbalanced force in engine 2.

[0069] Furthermore, step S4 specifically includes:

[0070] The unbalanced forces generated by the crankshaft piston during the operation of engine 2 are analyzed and a force diagram is established;

[0071] Determine the magnitude of the unbalanced force at different locations based on the force diagram;

[0072] Let point A be the mounting point between bracket 3 and the vehicle frame, and point B be the mounting point between bracket 3 and engine 2. Arrange the line connecting points A and B perpendicular to the position where the unbalanced force is larger.

[0073] Specifically, after analyzing the unbalanced forces generated by the crankshaft piston and establishing a force diagram, such as... Figure 4 As shown, the unbalanced force is periodic, and its force diagram is elliptical. The unbalanced force is large at the major axis of the ellipse and small at the minor axis. Based on this, it is possible to change the direction of the unbalanced force by arranging the major axis of the unbalanced force of engine 2 perpendicular to the line connecting the mounting points of bracket 3 (line AB). By rotating bracket 3 (point A is the mounting point between bracket 3 and the vehicle frame, and point B can rotate around point A), the vibration caused by the unbalanced force of engine 2 can be effectively reduced.

[0074] The present invention also provides a motorcycle in which the engine assembly and rear shock absorber are arranged using the above-described vibration reduction arrangement method.

[0075] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0076] The above provides a detailed description of the vibration reduction arrangement method and motorcycle provided by the present invention. Specific examples have been used to illustrate the principles and implementation methods of the invention. The descriptions of the embodiments above are merely for the purpose of helping to understand the method and core ideas of the present invention. It should be noted that those skilled in the art can make various improvements and modifications to the present invention without departing from its principles, and these improvements and modifications also fall within the protection scope of the present invention.

Claims

1. A method for arranging components to reduce vibration, characterized in that, Applied to a motorcycle, the motorcycle includes an engine (2) and a bracket (3) connecting the engine (2) and the frame. The arrangement method includes: S1. Analyze the forces acting on the rear wheel (1) of the motorcycle based on its state during the motorcycle's motion, and establish the force balance equation. The force analysis in step S1 specifically includes: With the center of the rear wheel (1) as point 0, the compressive force of the rear shock absorber (4) is F1, the ground support force is F2, the support force of the bracket (3) on the engine (2) is F3, and the weight of the engine assembly is G; The engine assembly includes an engine (2), a rear wheel (1), and related accessories mounted on the engine (2) and the rear wheel (1); In step S1, the force balance equations include: Horizontal direction: F1 X =F3 X ; Vertical direction: F1 Y +G=F3 Y +F2; S2. Analyze the influencing factors of the support force of the bracket (3) on the engine (2) based on the force balance equation; Step S2 specifically includes: By measuring the parameters F1, F2, and G, and based on the force balance equation, the magnitude of the supporting force of the bracket on the engine can be obtained as: F3 2 =F3 X 2 +F3 Y 2 ; The torque calculation with respect to point 0 yields: F1·L1 + F3·L3 = G·L2; S3. Adjust the arrangement of the engine assembly according to the influencing factors so that the support force of the bracket (3) on the engine (2) tends to be 0.

2. The arrangement method for reducing vibration according to claim 1, characterized in that, Step S3 specifically includes: By adjusting the value of F1·L1, the value of F3 is reduced and approaches 0, thereby minimizing the deformation at the engine (2) buffer sleeve and bracket (3) buffer sleeve.

3. A method for reducing vibration according to any one of claims 1-2, characterized in that, Also includes: S4. During the operation of the engine (2), the unbalanced force generated by the crankshaft piston is analyzed and a force diagram is established. Based on the analysis results, the installation angle between the engine (2) and the bracket (3) is adjusted to reduce the vibration caused by the unbalanced force of the engine (2).

4. The arrangement method for reducing vibration according to claim 3, characterized in that, Step S4 specifically includes: During the operation of the engine (2), the unbalanced force generated by the crankshaft piston is analyzed and a force diagram is established; Determine the magnitude of the unbalanced force at different locations based on the force diagram. Let point A be the mounting point of bracket (3) and vehicle frame, and point B be the mounting point of bracket (3) and engine (2). Arrange the line connecting points AB perpendicular to the position with larger unbalanced force.

5. A motorcycle, characterized in that, The motorcycle employs a vibration reduction arrangement method as described in any one of claims 1-4 to arrange the engine assembly and rear shock absorber of the motorcycle.

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