CN101718322B - Flexible hanging device of engine - Google Patents

Abstract

The invention provides an engine flexible suspension device, comprising an engine bracket beam (1) and an engine mount (2) on a vehicle frame, and bolts ( 3) connected, there is a first damping spring (4) between the engine bracket beam (1) and the engine mount (2), and a second damping spring (5) above the engine bracket beam (1), A first damping rubber sleeve (6) is installed in the first damping spring (4), and a second damping rubber sleeve (7) is installed in the second damping spring (5). The present invention is simple in technology and low in cost. Practice has proved that it can effectively solve the numbness problem caused by the high-frequency vibration of the engine when driving the vehicle. The vibration improvement effect of the unbalanced shaft engine vehicle installed with this device is equivalent to or It is better than the complete vehicle with a balance shaft engine, and the device also ensures the reliability and durability of the suspension device.

Description

Engine flexible suspension

technical field

The invention relates to an engine suspension device, especially an engine flexible suspension device.

Background technique

There are three main structural forms of the existing motorcycle engine suspension device: the first is that the engine is rigidly connected and suspended by the suspension bolt and the vehicle frame; The sleeve and the frame are softly connected and suspended; the third is that the engine is connected to the engine bracket through a suspension bolt and then connected to the frame through a unilateral spring. The first way is that the high-frequency vibration of the engine is directly transmitted to the car body without attenuation, resulting in numb riding feeling and poor comfort; the second way is that the high-frequency vibration of the engine is partially attenuated by rubber damping, and the whole car feels numb when riding. However, because the skeleton in the rubber sleeve is almost inelastic, the vibration attenuation effect is limited, and the rubber is easily separated from the skeleton due to long-term vibration and traction, resulting in suspension failure; the third suspension method is connected by a spring, although it can buffer the vibration However, since there is only a spring between the engine bracket and the frame, it only has a buffering effect on the downward vibration of the engine relative to the frame, and there is no damping medium involved in attenuating the vibration energy transmitted to the frame during the stretching process of the spring. Therefore, the damping effect is still not ideal. At the same time, because there is no positioning entity in the inner hole of the spring, the lateral rigidity of the engine suspension is insufficient. When the engine outputs a large torque, the installation posture of the engine will be obviously abnormal, and the engine will shake too much laterally. .

Contents of the invention

The problem to be solved by the present invention is to provide an engine flexible suspension device with buffering and damping functions in both up and down directions.

In order to solve the above-mentioned technical problems, the engine flexible suspension device provided by the present invention includes an engine bracket crossbeam and an engine mounting seat on the vehicle frame. The engine bracket beam and the engine mounting seat are connected by bolts, and A first damping spring is sleeved on the bolts between the engine mounts, and a second damping spring is sleeved on the bolts above the engine bracket beam.

During the running of the vehicle, due to the bumps and the high-frequency vibration of the engine itself, the engine bracket beam has both downward vibration and upward vibration relative to the engine mounting seat on the frame. In the present invention, the bolts on the upper and lower sides of the engine bracket crossbeam are respectively fitted with the second and first damping springs, the first damping spring is used to buffer the downward vibration of the engine relative to the vehicle frame, and the second damping spring is used to buffer The upward vibration of the engine relative to the frame can significantly reduce the vibration of the whole vehicle and improve the driving comfort of the vehicle.

Further, the first damping spring is installed with a first damping rubber sleeve, and the second damping spring is equipped with a second damping rubber sleeve. The first damping rubber sleeve and the second damping rubber sleeve not only participate in attenuating vibration energy as a damping medium during the stretching process of the spring, so that the compression amount of the spring is easy to control, but also play the role of positioning the entity in the spring, increasing the lateral direction of the spring Stiffness, when the engine outputs a large torque, it prevents the engine from shaking too much sideways and ensures that the engine maintains a normal installation posture.

Further, the lower end of the first damping spring is located in the first positioning race, the upper end of the first damping spring is located in the second positioning race, the lower end of the second damping spring is located in the third positioning race, and the first The positioning seat ring is fixed on the engine mount, and the third positioning seat ring is fixed on the engine bracket beam. With the position limiting function of the positioning seat ring, the vibration damping spring and the damping rubber sleeve are stable in posture during stretching and compression, and work reliably, ensuring that the elastic damping characteristics of each suspension point of the engine are consistent.

Further, the upper end of the first damping spring is in contact with the nylon sleeve, and the nylon sleeve is set on the bolt; the third damping rubber sleeve is set on the bolt below the engine mounting seat; the upper end of the third damping rubber sleeve is located at the fourth positioning seat circle. The nylon sleeve and the third damping rubber sleeve are distributed at the two ends of the bolt, which also play the role of buffering and vibration reduction, and the fourth positioning ring limits the position of the third damping rubber sleeve.

Further, the lower end of the second damping rubber sleeve is provided with a journal extending into the bolt hole of the engine bracket beam, and the upper end of the third damping rubber sleeve is provided with a journal extending into the bolt hole of the engine mount. The journal of the damping rubber sleeve completely isolates the bolt from the wall of the bolt hole, and plays a role of buffering and damping the lateral vibration. When the engine outputs a large torque, it can prevent the engine from excessive lateral vibration and ensure that the engine maintains a normal installation posture. .

Furthermore, the bolts are stepped bolts. When assembling, the nuts are placed on the small-diameter section and stop at the step. The stepped bolts are used and the size is limited, so that the damping rubber sleeve will fill the inner hole of the spring after the nut is tightened in place, and the rigidity of the device in all directions will be increased. Appropriate, so that the device can be in the best working condition.

The present invention is simple in technology and low in cost. Practice has proved that it can effectively solve the numbness problem caused by the high-frequency vibration of the engine when driving the vehicle. The vibration improvement effect of the unbalanced shaft engine vehicle installed with this device is equivalent to or It is better than the complete vehicle with a balance shaft engine, and the device also ensures the reliability and durability of the suspension device.

Description of drawings

Fig. 1 is a structural representation of the present invention;

Fig. 2 is the local schematic diagram that the present invention is applied on the three-wheel motorcycle;

Fig. 3 is the top view of Fig. 2;

In the figure: 1. Engine bracket beam; 2. Engine mount; 3. Bolt; 4. First damping spring; 5. Second damping spring; 6. First damping rubber sleeve; 7. Second damping rubber 8. The first positioning ring; 9. The second positioning ring; 10. The third positioning ring; 11. Nylon sleeve; 12. The third damping rubber sleeve; 13. The fourth positioning ring; 14. Nut ; 15. Flat washer; 16. Engine; 17. Frame keel; 18. Engine front bracket; 19. Engine rear bracket.

Detailed ways

The present invention will be further described below in conjunction with drawings and embodiments.

As shown in Figure 1, the engine flexible suspension device of the present invention has an engine bracket crossbeam 1 and an engine mount 2 on the vehicle frame, and is connected with a bolt 3 between the engine bracket crossbeam 1 and the engine mount 2. The bolt 3 between the engine bracket beam 1 and the engine mount 2 is covered with a first damping spring 4 , and the bolt 3 above the engine bracket beam 1 is sleeved with a second damping spring 5 .

During the running of the vehicle, due to the bumps and the high-frequency vibration of the engine itself, the engine bracket crossbeam 1 has both downward vibration and upward vibration relative to the engine mounting seat 2 on the vehicle frame. In the present invention, the second and first damping springs 5 and 4 are respectively set on the bolts 3 on the upper and lower sides of the engine bracket beam 1. The first damping spring 4 is used to buffer the downward vibration of the engine relative to the vehicle frame. The damping spring 5 is used to buffer the upward vibration of the engine relative to the vehicle frame, so it can obviously reduce the vibration of the whole vehicle and improve the driving comfort of the vehicle.

Referring to Fig. 1, the first damping rubber sleeve 6 is installed in the first damping spring 4, the second damping rubber sleeve 7 is installed in the second damping spring 5, and the bolt 3 passes through the first damping rubber sleeve 6 and the second damping spring 5. The central hole of the second damping rubber sleeve 7. The first damping rubber sleeve 6 and the second damping rubber sleeve 7 not only participate in attenuating vibration energy as a damping medium during the stretching and compression process of the spring, so that the compression amount of the spring is easy to control, but also play a role in positioning the entity in the spring, increasing the force of the spring Lateral stiffness, when the engine outputs a large torque, prevents the engine from shaking too much laterally and ensures that the engine maintains a normal installation posture.

As shown in Figure 1, the lower end of the first damping spring 4 is located in the first positioning seat 8, the upper end of the first damping spring 4 is located in the second positioning seat 9, and the lower end of the second damping spring 5 is located in the second positioning seat 9. Three positioning rings 10, the first positioning ring 8 is fixed on the engine mount 2, and the third positioning ring 10 is fixed on the engine bracket beam 1. With the position limiting function of the positioning seat ring, the vibration damping spring and the damping rubber sleeve are stable in posture during stretching and compression, and work reliably, ensuring that the elastic damping characteristics of each suspension point of the engine are consistent.

As shown in Figure 1, the upper end of the first damping spring 4 abuts against the nylon sleeve 11, and the nylon sleeve 11 is set on the bolt 3, and a thickened flat washer 15 is arranged between the upper side of the nylon sleeve 11 and the bolt head, and the nylon sleeve 11 The lower end of 11 is provided with a journal that extends into the inner hole of the second damping spring 5 , and the lower end of the nylon sleeve 11 abuts against the upper end surface of the second damping rubber sleeve 7 . A third damping rubber sleeve 12 is set on the bolt 3 below the engine mount 2 . The upper end of the third damping rubber sleeve 12 is located inside the fourth positioning race 13 .

The nylon sleeve 11 and the third damping rubber sleeve 12 are distributed at both ends of the bolt 3 and also play a role of buffering and vibration reduction. The fourth positioning race 13 limits the position of the third damping rubber sleeve 12 .

It can also be seen from Figure 1 that the lower end of the second damping rubber sleeve 7 is provided with a journal extending into the bolt hole of the engine bracket beam 1, and the upper end of the third damping rubber sleeve 12 is provided with a journal extending into the engine mounting in the bolt hole of seat 2. The journal of the damping rubber sleeve completely isolates the bolt from the wall of the bolt hole, which has the effect of buffering and damping the lateral sway. When the engine outputs a large torque, it prevents the engine from swaying too much laterally and ensures that the engine maintains a normal installation posture.

The bolt 3 is a step bolt, and the nut 14 is sleeved on the small diameter section and ends at the step during assembly. Stepped bolts are used and the size is limited so that the damping rubber sleeve swells the inner hole of the spring after the nut 14 is tightened in place, and the rigidity of the device is suitable in all directions, so that the device can be in the best working state.

Fig. 2, Fig. 3 are the schematic diagrams that the present invention is applied on the three-wheel motorcycle, there are four suspension points between engine 16 and vehicle frame keel 17, and engine 16 is connected with bolt and supported on engine front bracket 18 and engine rear support On the frame 19, the engine front bracket 18 and the engine rear bracket 19 are respectively fixedly supported on the front and rear engine bracket beams 1, and the two ends of the engine bracket beam 1 are respectively supported on the frame keel 17 by the engine flexible suspension device of the present invention. engine mount 2 on the In the present invention, the engine bracket beam 1 represents a support connected to the engine, and the engine mount 2 represents the support used to install the engine on the vehicle frame. The name is not uniquely limited, and they can also be other structural forms.

Practice has proved that the present invention is simple in technology and low in cost, and can effectively solve the numbness problem caused by the high-frequency vibration of the engine when driving the vehicle. The vibration improvement effect of the unbalanced shaft engine vehicle installed with this device is comparable Or it is better than a complete vehicle with a balance shaft engine, and the device also ensures the reliability and durability of the suspension device.

Claims (6)

1. An engine flexible suspension device, including the engine bracket beam (1) and the engine mounting seat (2) on the frame, and bolts (3) are used between the engine bracket beam (1) and the engine mounting base (2) Connected, the bolt (3) between the engine bracket beam (1) and the engine mount (2) is covered with a first damping spring (4), which is characterized in that: the engine bracket beam (1) above The bolt (3) is covered with a second damping spring (5); the first damping spring (4) is equipped with a first damping rubber sleeve (6), and the second damping spring (5) is equipped with a There is a second damping rubber sleeve (7); the lower end of the first damping spring (4) is located in the first positioning race (8), and the upper end of the first damping spring (4) is located in the second positioning race ( In 9), the lower end of the second damping spring (5) is located in the third positioning seat (10), the first positioning seat (8) is fixed on the engine mount (2), and the third positioning seat (10 ) is fixed on the engine bracket beam (1). 2. The engine flexible suspension device according to claim 1, characterized in that: the upper end of the second damping spring (5) abuts against the nylon sleeve (11), and the nylon sleeve (11) is sleeved on the bolt (3) superior. 3. The engine flexible suspension device according to claim 1, characterized in that: a third damping rubber sleeve (12) is set on the bolt (3) below the engine mount (2). 4. The engine flexible suspension device according to claim 3, characterized in that: the upper end of the third damping rubber sleeve (12) is located in the fourth positioning race (13). 5. The engine flexible suspension device according to claim 3, characterized in that: the lower end of the second damping rubber sleeve (7) is provided with a journal extending into the bolt hole of the engine bracket beam (1), and the second The upper ends of the three damping rubber sleeves (12) are provided with journals that extend into the bolt holes of the engine mount (2). 6. The engine flexible suspension device according to claim 1, characterized in that: the bolt (3) is a stepped bolt, and the nut (14) is sleeved on the small-diameter section and ends at the step when assembled.

Images