Composite suspension cushion for fuel tricycle

Abstract

The utility model discloses a composite suspension soft cushion for a fuel oil tricycle, and relates to the field of vehicle engineering, an inner suspension soft cushion is installed in an outer suspension soft cushion through a press fitting process to form the composite suspension soft cushion, and the outer suspension soft cushion with small dynamic stiffness and small damping coefficient is adopted. The high-frequency vibration of the engine is effectively absorbed, the inner suspension cushion with large dynamic stiffness and damping coefficient is adopted, the low-frequency vibration of the engine is effectively absorbed, and the riding comfort of the fuel tricycle is further improved; the outer suspension cushion vibration absorption rubber and the inner suspension cushion vibration absorption rubber are made of high-quality natural rubber and specific compounding agents, necessary mechanical strength is provided, good weather resistance and durability are guaranteed, the performance can be kept even in a severe environment, and therefore the maintenance requirement and the operation cost caused by vibration are reduced, and the service life of the suspension cushion is prolonged. By means of the design, the problems that a traditional fuel oil tricycle is large in vibration and poor in comfort are effectively solved.

Description

Technical Field

[0001] This utility model relates to the field of vehicle engineering, specifically to a composite suspension pad for fuel-powered tricycles. Background Technology

[0002] Gasoline-powered tricycles have become one of the main means of transportation in rural areas and peri-urban areas. These tricycles primarily use single-cylinder engines as their power source, with the engine connected to the vehicle body via suspension pads. Due to the inherent vibration characteristics of single-cylinder engines, the vehicle transmits significant vibrations to the body during operation. As market demands for driving and riding comfort increase, research into reducing vehicle body vibrations has become increasingly important. Engine vibrations can be categorized into low-frequency and high-frequency vibrations. Low-frequency vibrations have larger amplitudes, while high-frequency vibrations have smaller amplitudes, placing increasingly higher demands on the design of engine suspension pads. In the low-frequency vibration range, suspension pads require high dynamic stiffness and damping coefficients to quickly reduce large amplitudes. In the high-frequency vibration range, suspension pads require lower dynamic stiffness and damping coefficients to more effectively absorb vibrations and reduce their transmission rate.

[0003] The prior art discloses a two-stage engine mount device for a fuel-powered tricycle (publication number CN2220005281U), which can effectively reduce engine vibration and improve ride comfort. However, the following problems still need to be solved in actual use:

[0004] The design structure is complex, the machining accuracy requirements are high, and the manufacturing cost is relatively high. Therefore, there is an urgent need for an engine mounting device with a simple structure, low machining accuracy requirements, and low manufacturing cost.

[0005] The installation process involves many steps, the final assembly process requires high standards, and the maintenance is difficult. Therefore, there is an urgent need for an engine composite suspension device that is easy to install and maintain. Utility Model Content

[0006] The main purpose of this invention is to provide a composite suspension pad for fuel-powered tricycles, which can effectively solve the problems in the background art.

[0007] To achieve the above objectives, this utility model provides the following technical solution:

[0008] A composite suspension pad for a fuel-powered tricycle includes: an outer suspension pad and an inner suspension pad; the inner suspension pad and the outer suspension pad are assembled into place by an interference fit process through a press-fitting process.

[0009] The external suspension pad includes an outer sleeve, an inner sleeve, and vibration-absorbing rubber.

[0010] The inner suspension pad includes an inner suspension pad outer sleeve, an inner suspension pad inner spacer, and an inner suspension pad vibration-absorbing rubber.

[0011] Preferably, the outer sleeve of the outer suspension soft pad and the inner sleeve of the outer suspension soft pad are separated by vibration-absorbing rubber. The vibration-absorbing rubber is vulcanized and has a Shore hardness of 60-65. Its shape is such that four stress points are symmetrically distributed and the center line angle is 45° with the vertical line. This design can not only withstand compression deformation but also adapt to shear deformation. While absorbing vibration, it can also better withstand normal stress and shear stress.

[0012] Preferably, the inner suspension soft pad outer sleeve and the inner suspension soft pad inner spacer are separated by inner suspension soft pad vibration-absorbing rubber. The inner suspension soft pad vibration-absorbing rubber is vulcanized and has a Shore hardness of 45-50. Its shape is such that one side is lower than the other side of the two stress points, and the center line angle is 45° with the vertical line. This design can not only withstand compression deformation, but also adapt to shear deformation. While absorbing vibration, it can also better withstand normal stress and shear stress.

[0013] Preferably, the outer sleeve of the outer suspension pad is connected to the engine, and the inner spacer of the inner suspension pad is connected to the vehicle body. When the engine generates high-frequency vibration, it is absorbed by the vibration-absorbing rubber of the outer suspension pad. When the engine generates low-frequency vibration, it is absorbed by the vibration-absorbing rubber of the inner suspension pad, thus achieving good vibration absorption and isolation between the engine and the vehicle body.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] 1. By using an inner suspension pad with high dynamic stiffness and high damping coefficient, the low-frequency vibration generated by the engine can be quickly absorbed and reduced. By using an outer suspension pad with low dynamic stiffness and low damping coefficient, the high-frequency vibration generated by the engine can be quickly absorbed and reduced. This design directly solves the problem of poor driving comfort caused by low-frequency and high-frequency vibrations of the engine in the original fuel tricycle.

[0016] 2. Utilizing high-quality natural rubber and appropriate compounding agents, both the outer and inner suspension pads are not only functionally effective but also guaranteed in terms of durability. The choice of natural rubber provides sufficient elasticity and weather resistance, allowing the suspension pads to maintain good performance even in harsh environments. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the externally suspended soft pad structure of this utility model;

[0019] Figure 3 This is a schematic diagram of the internal suspension cushion structure of this utility model;

[0020] In the diagram: 1. Outer suspension pad; 11. Outer sleeve of the outer suspension pad; 12. Inner sleeve of the outer suspension pad; 13. Vibration-absorbing rubber of the outer suspension pad; 2. Inner suspension pad; 21. Outer sleeve of the inner suspension pad; 22. Inner spacer of the inner suspension pad; 23. Vibration-absorbing rubber of the inner suspension pad. Detailed Implementation

[0021] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0022] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0023] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," and "connected," etc., should be interpreted broadly. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0024] Example

[0025] Please see Figure 1-3 This utility model provides a technical solution:

[0026] A composite suspension pad for a fuel-powered tricycle includes an outer suspension pad and an inner suspension pad. The inner and outer suspension pads are assembled in an interference fit using a press-fit process. The outer suspension pad includes an outer sleeve, an inner sleeve, and vibration-absorbing rubber. The inner suspension pad includes an outer sleeve, an inner spacer, and vibration-absorbing rubber. The vibration-absorbing rubber is located between the outer sleeve and the inner sleeve of the outer suspension pad. The vibration-absorbing rubber is vulcanized, has a Shore hardness of 60-65, and is symmetrically distributed with four stress points. The centerline angle is 45° to the vertical. This design allows it to withstand both compressive deformation and shear deformation, effectively absorbing vibration. While absorbing vibration, it can also better withstand normal and shear stresses. The inner suspension pad's outer sleeve and inner spacer are connected by inner suspension pad vibration-absorbing rubber. This inner suspension pad vibration-absorbing rubber is vulcanized, has a Shore hardness of 45-50, and is shaped with one side lower than the other at the two stress points, with the center line angled at 45° to the vertical. This design not only withstands compressive deformation but also adapts to shear deformation, absorbing vibrations while better withstanding normal and shear stresses. The outer suspension pad's outer sleeve is connected to the engine, and the inner suspension pad's inner spacer is connected to the vehicle body. When the engine generates high-frequency vibrations, the outer suspension pad vibration-absorbing rubber attenuates and absorbs them; when the engine generates low-frequency vibrations, the inner suspension pad vibration-absorbing rubber attenuates and absorbs them, achieving excellent vibration absorption and isolation between the engine and the vehicle body.

[0027] The manufacturing process of this utility model for a composite suspension pad for a fuel-powered tricycle is as follows: First, an appropriate amount of rubber-metal adhesive is evenly applied to the contact surfaces of the inner ring of the outer suspension pad sleeve 11 and the outer ring of the inner suspension pad sleeve 12, and the contact surfaces of the inner ring of the inner suspension pad sleeve 21 and the outer ring of the inner suspension pad spacer 22. Then, it is allowed to dry naturally in clean air at room temperature for 30 to 45 minutes. Next, the treated outer suspension pad sleeve 11 and the inner suspension pad sleeve 12, and the inner suspension pad sleeve 21 and the inner suspension pad spacer 22 are placed in pairs into a mold. Pre-mixed natural rubber and its additives are quickly filled in, and the mold is closed for molding. This process is completed using an extruder and a mold, ensuring the precise molding of the outer suspension pad vibration-absorbing rubber 13 and the inner suspension pad vibration-absorbing rubber 23.

[0028] The molded outer suspension pad 1 and inner suspension pad 2 are then transferred to a vulcanizing tank for vulcanization under heat and pressure. This process, lasting 30 to 45 minutes, is a critical step in the entire manufacturing process. This step aims to ensure that the natural rubber and the rubber-metal adhesive vulcanize simultaneously, thereby achieving optimal adhesion between the outer suspension pad outer sleeve 11 and the outer suspension pad inner sleeve 12, and between the inner suspension pad outer sleeve 21 and the inner suspension pad inner spacer 22. This process not only ensures that the outer suspension pad 1 and the inner suspension pad 2 possess suitable dynamic stiffness and damping coefficients, but also ensures excellent vibration absorption performance under both low-frequency and high-frequency vibration conditions.

[0029] This invention provides a composite suspension pad specifically designed for gasoline-powered tricycles, aiming to effectively reduce low-frequency and high-frequency vibrations generated by single-cylinder engines. The composite suspension pad comprises two main components: an outer suspension pad 1 and an inner suspension pad 2. The outer suspension pad 1 is made of natural rubber and specific compounding agents, possessing a Shore hardness of 60-65 degrees. This design not only withstands compressive deformation but also adapts to shear deformation, thereby effectively absorbing vibrations and rapidly reducing amplitude in the high-frequency vibration zone during engine operation. The inner suspension pad 2 is also made of natural rubber and specific compounding agents. With a Shore hardness of 45-50, this design can withstand both compression and shear deformation, effectively absorbing vibration and rapidly reducing amplitude in the low-frequency vibration zone during engine operation. The inner suspension pad 2 and the outer suspension pad 1 are assembled by press fitting, with the inner suspension pad outer sleeve 21 and the outer suspension pad inner sleeve 22 interlocked to form a composite suspension pad. Together, they absorb the low-frequency and high-frequency vibrations generated by the engine. The composite suspension pad significantly improves the vehicle's ride comfort and significantly reduces the impact of vibration on the vehicle body, making it more suitable for widespread use.

[0030] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A composite suspension pad for a fuel-powered tricycle, comprising an outer suspension pad (1) and an inner suspension pad (2), characterized in that: The outer suspension pad (1) includes an outer sleeve (11), an inner sleeve (12), and a vibration-absorbing rubber (13). The inner suspension pad (2) includes an inner sleeve (21), an inner spacer (22), and a vibration-absorbing rubber (23). The outer suspension pad (1) and the inner suspension pad (2) are assembled in place by press fitting, with the inner sleeve (21) and the inner sleeve (12) of the outer suspension pad being press-fitted together.

2. The composite suspension pad for a fuel-powered tricycle according to claim 1, characterized in that: The outer sleeve (11) of the outer suspension soft pad and the inner sleeve (12) of the outer suspension soft pad are connected by vibration-absorbing rubber (13) of the outer suspension soft pad.

3. The composite suspension pad for a fuel-powered tricycle according to claim 1, characterized in that: The externally suspended soft pad vibration-absorbing rubber (13) is vulcanized and has a Shore hardness of 60-65. Its shape is four force points symmetrically distributed, and the center line angle is 45° with the vertical line.

4. The composite suspension pad for a fuel-powered tricycle according to claim 1, characterized in that: The inner suspension pad outer sleeve (21) and the inner suspension pad inner spacer (22) are connected by the inner suspension pad vibration-absorbing rubber (23).

5. A composite suspension pad for a fuel-powered tricycle according to claim 1, characterized in that: The inner suspension cushion vibration-absorbing rubber (23) is vulcanized and has a Shore hardness of 45-50. Its shape is such that one side of the two stress points is lower than the other side, and the center line angle is 45° with the vertical line.

6. The composite suspension pad for a fuel-powered tricycle according to claim 1, characterized in that: The outer sleeve (11) of the outer suspension soft pad is connected to the engine, and the inner spacer (22) of the inner suspension soft pad is connected to the vehicle body. When the engine generates high-frequency vibration, it is attenuated and absorbed by the vibration-absorbing rubber (13) of the outer suspension soft pad. When the engine generates low-frequency vibration, it is attenuated and absorbed by the vibration-absorbing rubber (23) of the inner suspension soft pad.

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