Engine suspension cradle structure

Abstract

The utility model discloses an engine suspension cradle structure which comprises a cradle, a left frame, a right frame and an engine, the cradle adopts an aluminum alloy integral forming process, and has the advantages of high strength, good fatigue resistance and capability of greatly reducing the mass; the cradle is of a unilateral structure, so that the strength is guaranteed, the spatial layout is optimized, the cradle is convenient to install, and the cost is reduced. On the basis of a single-side structure, a cavity type design is added, and a reinforcing rib structure is arranged in a cavity, so that the structural strength is ensured, and the mass is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of scooter suspension, especially to an engine cradle structure with light weight and high efficient damping performance. BACKGROUND

[0002] The cradle in the traditional engine suspension system mostly adopts iron material, however, the iron material has obvious shortcomings such as low strength and large mass, which affects the handling and fuel efficiency of the whole vehicle; in addition, the cradle in the traditional technology is mostly single-point connected and has a lever structure, which leads to poor connection stability and poor damping effect, affecting the stability and riding comfort of the vehicle; in the prior art, the bilateral structure is a common structure, which increases the stability to a certain extent, but has not achieved the best balance between reducing the mass, improving the damping effect and installation and disassembly. SUMMARY

[0003] In order to overcome the shortcomings of the prior art, the utility model aims at providing an engine suspension cradle structure. The utility model adopts high-strength aluminum alloy material, which significantly reduces the weight of the suspension system and improves the handling and fuel efficiency of the whole vehicle; at the same time, the utility model adopts a unilateral structure and a cavity type design, which simplifies the installation and disassembly process while ensuring the strength and light weight; finally, the utility model designs a combination of hollow and solid buffer rubbers at the key positions of the structure, which greatly optimizes the damping effect of the suspension system and improves the stability and riding comfort of the motorcycle.

[0004] The utility model technical scheme is as follows: an engine suspension cradle structure, comprising a cradle, a left frame, a right frame and an engine, the cradle adopts an aluminum alloy integrated forming process, has high strength, good fatigue resistance and can greatly reduce the mass; the cradle is a unilateral structure, which optimizes the spatial layout while ensuring the strength, facilitates installation and reduces the cost. On the basis of the unilateral structure, a cavity type design is added, and a reinforcing rib structure is arranged inside the cavity, which not only ensures the structural strength but also reduces the mass.

[0005] Buffer assemblies are arranged in the shaft holes of the cradle, and a bushing is arranged in the shaft holes on the left and right sides of the cradle, a buffer rubber layer is arranged between the inner ring and the outer ring of the bushing; wherein, the first U-shaped port is provided with a hollow structure buffer rubber with free travel, and the hollow rubber provides elasticity to absorb vibration; solid structure buffer rubbers are arranged between the inner and outer rings of the bushings of the second shaft hole, the third shaft hole and the engine lifting lug, the solid rubber ensures the fastening stability of the key positions and makes the stress more uniform, and the parts are not easy to be damaged. The combination of the two kinds of rubbers not only makes the technology flexible and stable, but also effectively absorbs the vibration transmitted by the engine.

[0006] The engine suspension rocker structure, the solid structure buffer rubber outer cylindrical surface and the inner ring hole are made of steel material, and the solid rubber is arranged between the two; the hollow structure buffer rubber is an outer cylindrical surface, an inner ring hole and at least one hollow cavity, the hollow cavity is arranged between the inner ring hole and the outer surface, and the whole structure is integrally formed by rubber.

[0007] The engine suspension rocker structure, before installation, the hollow structure buffer rubber of the first U-shaped port on the left side of the rocker is positioned into the frame limiting block; the included angle between the line connecting the lower bottom surface of the hollow structure buffer rubber of the first U-shaped port on the left side of the rocker and the center of the second shaft hole on the left side and the extension line of the center of the second shaft hole on the left side along the X direction of the vehicle coordinate system is 55°-58°; the included angle between the line connecting the center of the second shaft hole on the left side, the third shaft hole on the right side and the lower end engine mounting shaft hole on the left and right sides and the plumb line of the ground is 39.5°-52.6°.

[0008] The engine suspension rocker structure, the first U-shaped port on the left side is positioned with the frame limiting block; the second shaft hole on the left side is gap-fitted with the mounting hole on the left frame; the third shaft hole on the right side is gap-fitted with the mounting hole on the right frame; and the connection between the lower end mounting shaft hole of the rocker and the lifting lug of the engine is interference-fitted.

[0009] The engine suspension rocker structure, the first U-shaped port on the left side is positioned with the frame limiting block; the second shaft hole on the left side is gap-fitted with the mounting hole on the left frame; the third shaft hole on the right side is gap-fitted with the mounting hole on the right frame; and the connection between the lower end mounting shaft hole of the rocker and the lifting lug of the engine is interference-fitted. BRIEF DESCRIPTION OF DRAWINGS

[0010] Figure 1 It is a structural schematic diagram of the utility model;

[0011] Figure 2 It is a front isometric view of the structure of the utility model;

[0012] Figure 3 It is a reinforcing rib design schematic diagram of the structure inside the utility model;

[0013] Figure 4 It is a structure installation angle schematic diagram of the utility model;

[0014] Figure 5 It is a limiting block installation schematic diagram of the structure of the utility model;

[0015] Figure 6 It is a buffer assembly structure schematic diagram of the structure of the utility model;

[0016] Figure 7Is the schematic diagram of the utility model structure and engine, frame connection. DETAILED DESCRIPTION

[0017] The specific structure of the utility model embodiment is further described below with reference to the drawings.

[0018] Referring to the drawings, the utility model provides a kind of motorcycle engine suspension cradle structure. Its characterized is: cradle (5) is single-side cavity (17) type structure, and cavity inside is equipped with reinforcing rib (14) structure.

[0019] The above-mentioned engine suspension cradle structure, including cradle (5), left frame (7), right frame (10), the left frame (7) is equipped with mounting hole (8);The right frame (10) is equipped with upper mounting hole (11);The upper end of cradle (5) is equipped with mounting shaft hole, the lower end is adopted "ladder type", and is equipped with the mounting shaft hole (4) connected with engine (13) lug (6).

[0020] In the above-mentioned one kind of motorcycle cradle structure, first U-shaped mouth (1) of cradle (5) left side is inserted into frame limiting block (9) first;Then the second shaft hole (2) of cradle (5) left side is connected with the mounting hole (8) of left frame (7) by bolt;The third shaft hole (3) of cradle (5) right side is connected with the mounting hole (11) of right frame (10) by bolt;Cradle lower end mounting shaft hole (4) is connected by installing connecting rod and engine (13) lug (6).

[0021] The angle β between the line connecting the lower bottom surface of the rubber sleeve of the first U-shaped mouth (1) of the cradle (5) left side to the center of the second shaft hole (2) left side and the extension line of the center of the second shaft hole (2) left side along the X direction of the vehicle coordinate system is between 55° and 58°.

[0022] In the above-mentioned one kind of motorcycle cradle structure, the mounting shaft hole of cradle (5) left and right sides is equipped with bushing, and the buffer rubber layer is arranged between the inner ring and the outer ring of the bushing;Among them, the first U-shaped mouth (1) is provided with hollow structure buffer rubber (16) with free travel, and the bushing inner and outer rings between the second shaft hole (2) and the third shaft hole (3) are provided with solid structure buffer rubber (15).

[0023] In the above-mentioned one kind of motorcycle cradle structure, the outer cylindrical surface and the inner ring hole of the solid structure buffer rubber (15) are made of steel material, and the solid rubber is arranged between the two; the hollow structure buffer rubber (16) is provided with outer cylindrical surface, inner ring hole and at least one hollow cavity, the hollow cavity is arranged between the inner ring hole and the outer surface, and the whole structure is integrally formed by rubber.

[0024] The engine suspension cradle structure is characterized in that: the left second shaft hole (2) and the left frame (7) upper mounting hole (8) are in clearance fit; the right third shaft hole (3) and the right frame (10) upper mounting hole (11) are in clearance fit;

[0025] The cradle lower end mounting shaft hole (4) and the engine (13) lifting lug (6) connection is in interference fit, and the lifting lug (6) is provided with a solid structure buffer rubber (15) composed of an elastic deformation body, so that the engine (13) of the motorcycle and the frame (12) are changed from the traditional simple rigid connection to the elastic deformation buffer connection, thereby effectively absorbing the vibration generated during the operation of the engine (13).

[0026] The above is only a preferred embodiment of the present application, and does not limit the structure of the present application in any form. Any simple modification, equivalent change and modification made according to the technical essence of the present application to the above embodiment still belongs to the scope of the technical solution of the present application.

Claims

1. An engine suspension cradle structure, comprising a cradle, a left frame, a right frame, and an engine, characterized in that: The cradle has a single-sided structure, and based on the single-sided structure, it has a cavity, and a reinforcing rib structure is set inside the cavity.

2. The engine suspension cradle structure according to claim 1, characterized in that: The second shaft hole on the left side of the rocker arm is connected to the mounting hole on the left frame by bolts; the third shaft hole on the right side is connected to the mounting hole on the right frame by bolts; the lower end adopts a "stepped" shape and is provided with a mounting shaft hole, which is connected to the engine hanger by a mounting rod.

3. The engine suspension cradle structure according to claim 2, characterized in that: Each of the rocker arm's shaft holes is equipped with a buffer assembly, and the left and right sides of the rocker arm's mounting shaft holes are equipped with bushings. A buffer rubber layer is provided between the inner and outer rings of the bushing. The first U-shaped opening is equipped with a hollow buffer rubber structure with free travel. Solid buffer rubber structure is provided between the inner and outer rings of the bushings of the second shaft hole, the third shaft hole, and the engine hanger.

4. The engine suspension cradle structure according to claim 3, characterized in that: The solid structure buffer rubber has an outer cylindrical surface and an inner ring hole made of steel, with solid rubber in between; the hollow structure buffer rubber has an outer cylindrical surface, an inner ring hole, and at least one hollow cavity, which is located between the inner ring hole and the outer surface, and the entire structure is integrally molded from rubber.

5. The engine suspension cradle structure according to claim 4, characterized in that: The angle between the line connecting the bottom surface of the first U-shaped hollow structure buffer rubber on the left side of the rocker arm to the center of the second shaft hole on the left side and the extended line of the center of the second shaft hole on the left side along the X direction of the vehicle coordinate system is between 55° and 58°; the angle between the line connecting the center of the second shaft hole on the left side, the third shaft hole on the right side, and the center of the lower engine mounting shaft hole on the lower side of the rocker arm and the vertical line of the ground is between 39.5° and 52.6°.

6. The engine suspension cradle structure according to claim 5, characterized in that: The first U-shaped opening on the left side is positioned with the frame limiting block; the second shaft hole on the left side is clearance-fitted with the mounting hole on the left frame; the third shaft hole on the right side is clearance-fitted with the mounting hole on the right frame; and the connection between the mounting shaft hole at the lower end of the rocker arm and the engine hanger lug is interference-fitted.

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