CN211314970U

CN211314970U - Centrifugal pendulum type double-mass flywheel

Info

Publication number: CN211314970U
Application number: CN201921936908.8U
Authority: CN
Inventors: 周孟祥; 刘燚军; 李必刚; 黎凡
Original assignee: HUBEI LIOHO-TIANLUN MACHINERY CO LTD
Current assignee: HUBEI LIOHO-TIANLUN MACHINERY CO LTD
Priority date: 2019-09-06
Filing date: 2019-11-12
Publication date: 2020-08-21
Anticipated expiration: 2029-11-12
Also published as: CN111120574B; CN111120574A

Abstract

The utility model discloses a centrifugal pendulum formula dual mass flywheel, including the primary mass flywheel and the secondary mass flywheel of coaxial setting, set up the elastic damping mechanism between primary mass flywheel and secondary mass flywheel, elastic damping mechanism can take place elastic deformation when primary mass flywheel and secondary mass flywheel rotate relatively, a serial communication port, the one side hookup that primary mass flywheel was kept away from to secondary mass flywheel has the holder, there is at least one centrifugal pendulum along circumference evenly distributed on the holder. The utility model provides a two quality flywheel of centrifugal pendulum-type simple structure, low in manufacturing cost, the stable performance influences product overall structure for a short time, can further promote two quality flywheel to the suppression and the isolation effect of putting in order the car vibration, improves and drives the travelling comfort.

Description

Centrifugal pendulum type double-mass flywheel

Technical Field

The utility model relates to an automobile spare and accessory part makes the field, and is concrete, relates to a two mass flywheels of centrifugal pendulum formula.

Background

A dual mass flywheel is a new configuration that has appeared in automobiles in the last 80 th century, and is known by the acronym dmfw (double mass flywheel). It has great effect on vibration isolation and vibration damping of the automobile power transmission system.

The metal disc with the gear ring at the rear end of the engine is called a flywheel. The flywheel is made of cast steel, has a certain weight (called mass in automobile engineering), is fixed on the rear end face of the crankshaft by bolts, and the gear ring of the flywheel is embedded on the outer edge of the flywheel. When the engine is started, the flywheel gear ring is meshed with the starter gear to drive the crankshaft to rotate and start. Many believe that the flywheel is only active at start-up, and that it not only acts at engine start-up, but also stores and releases energy to improve the uniformity of engine operation after engine start-up, while transferring engine power to the clutch. It is known that the four-stroke engine only produces power in power stroke, other intake, compression and exhaust strokes consume power, the multi-cylinder engine works in alternate wheel flow, and the torque is output in pulse, so that a periodically changing torsion external force is applied to the crankshaft, the crankshaft rotates slowly and rapidly, and the smaller the number of cylinders is, the more obvious the engine is. In addition, when the automobile starts, the engine speed is suddenly reduced and the automobile is flamed out due to the sudden and sharp increase of the torque force. By utilizing the larger inertia of the flywheel, when the rotating speed of the crankshaft is increased, part of energy is absorbed to block the reduction of the rotating speed of the crankshaft, and when the rotating speed of the crankshaft is reduced, part of energy is released to accelerate the crankshaft, so that the rotation uniformity of the crankshaft is improved. When the engine runs at a constant speed, the torsional external force acted on the crankshaft by each cylinder is periodically changed, so that the crank wheel generates forced torsional vibration relative to the flywheel, and meanwhile, the crankshaft generates free torsional vibration due to the elasticity of the crankshaft and the inertia effect of the mass of moving parts such as the crankshaft, a balance block, a piston connecting rod and the like, and the two vibrations generate resonance. Therefore, some engines have torsional dampers attached to the front end of the crankshaft where the torsional vibration amplitude is greatest, absorbing energy in the form of rubber, silicone oil, or dry friction to damp the torsional vibration.

However, since the resonance of an automotive drive train depends on the moments of inertia of all the rotating discs in the drive train, the lower the critical speed, the greater the moment of inertia, and the greater the resonance. The torsional damper arranged on the clutch has two limitations, namely, the natural frequency between an engine and a transmission cannot be reduced below the idle speed, namely, the possibility of generating resonance at the idle speed cannot be avoided; secondly, because the spring corner in the clutch driven plate is limited, the rigidity of the spring cannot be reduced, and the damping effect is poor. In order to solve the two problems and achieve the aims of vibration isolation and vibration reduction more effectively, the dual-mass flywheel is produced.

The dual-mass flywheel is characterized in that an original flywheel is divided into two parts, one part is reserved on one side of an original engine and plays the role of the original flywheel for starting and transmitting the rotating torque of the engine, and the part is called as a primary mass. The other part is arranged at one side of the transmission of the power train and is used for improving the rotational inertia of the transmission, and the part is called a secondary mass dual-mass flywheel. An annular oil cavity is arranged between the two parts of flywheels, a spring damper is arranged in the cavity, the two parts of flywheels are connected into a whole by the spring damper, and the natural frequency of an engine and a gearbox system is changed by the spring damper, so that the transmission of vibration is reduced, and the comfort of the whole vehicle is improved. For the idle working condition that the rotating speed of the engine is low and various running working conditions that the rotating speed of the engine is high, the dual-mass flywheel can effectively inhibit and isolate vibration of the whole vehicle relative to the single-mass flywheel. However, a disadvantage of single spring damping is that it is generally only effective over a narrow frequency range and does not provide a good damping experience at certain engine speeds.

SUMMERY OF THE UTILITY MODEL

The utility model provides a two mass flywheels of centrifugal pendulum formula for solve among the prior art spring damping and only be effective in narrower frequency range usually, can not provide the problem that better damping was experienced under certain engine speed.

In order to solve the technical problem, the technical scheme of the utility model is that: a centrifugal pendulum type dual-mass flywheel comprises a primary mass flywheel and a secondary mass flywheel which are coaxially arranged, and an elastic damping mechanism arranged between the primary mass flywheel and the secondary mass flywheel, wherein the elastic damping mechanism can generate elastic deformation when the primary mass flywheel and the secondary mass flywheel rotate relatively, one surface of the secondary mass flywheel, which is far away from the primary mass flywheel, is connected with a retainer, and at least one centrifugal pendulum is uniformly distributed on the retainer along the circumference; a guide window corresponding to the centrifugal pendulum is arranged on the retainer;

the centrifugal pendulum comprises two mass blocks and a roller, a roller gasket is arranged in the guide window in a penetrating mode, the roller is arranged in the guide window and matched with the roller gasket, two ends of the roller gasket are respectively connected with the mass blocks, and the retainer is clamped between the two mass blocks.

Preferably, a limiting block is further arranged in the guide window, the limiting block is in interference fit with the roller liner, the limiting block and two ends of the roller liner are pressed on the mounting hole of the mass block, and a friction gasket is arranged between the mass block and the end face of the retainer.

Preferably, the primary mass flywheel comprises a main flywheel and a cover disc which is coaxially arranged with the main flywheel and fixedly connected with the main flywheel, a cavity is formed between the outer ring of the main flywheel and the outer ring of the cover disc, and a gear ring and a signal gear ring are sleeved on the main flywheel; the secondary mass flywheel comprises a driving plate and a spline hub, the driving plate is arranged between the cover plate and the main flywheel, the spline hub and the driving plate are coaxially arranged and fixedly connected, and two or more blocking parts are distributed on the periphery of the driving plate along the circumferential direction of the driving plate.

Preferably, the elastic damping mechanism comprises an arc-shaped spring and a spring slide, the spring slide is arranged on the main flywheel and is located in the cavity, the blocking portion divides the spring slide into a plurality of sub-slides, and the arc-shaped spring is arranged in the sub-slides.

Preferably, the cage is coupled to the secondary mass flywheel via a flange.

Preferably, the flange plate is riveted and fixed with a drive plate and a spline hub in the secondary mass flywheel through rivets.

Preferably, the retainer is provided with two or more than two guide windows, and the guide windows are symmetrically distributed on the retainer.

Preferably, the limiting block is a rubber limiting block.

Preferably, the rubbing pad is a plastic rubbing pad.

Preferably, a centrifugal pendulum protection cover is arranged on the retainer.

The utility model provides a two mass flywheels of centrifugal pendulum formula have following advantage:

1. simple structure, manufacturing cost is lower relatively, and the performance is more stable.

2. The suppression and isolation effect of the double-mass flywheel on the vibration of the whole vehicle can be further improved, and the driving and riding comfort is improved.

3. The centrifugal pendulum vibrates in a predetermined resonance range due to centrifugal force, and when the vibration of the centrifugal pendulum in the resonance range is superposed with the rotation motion of the dual mass flywheel, the vibration of the centrifugal pendulum causes the superposed vibration to be eliminated.

Drawings

Fig. 1 is a schematic structural diagram of the present invention;

FIG. 2 is a cross-sectional view taken along A-A of FIG. 1;

fig. 3 is a schematic diagram of a centrifugal pendulum structure.

Shown in the figure: 1. a primary mass flywheel; 11. a main flywheel; 12. a ring gear; 13. a signal gear ring; 14. a cover plate; 2. a secondary mass flywheel; 21. a splined hub; 22. a dial; 221. a blocking portion; 3. a holder; 31. a guide window; 4. performing centrifugal pendulum; 41. a mass block; 42. a rubbing pad; 43. a roller; 44. a limiting block; 45. a roller liner; 5. an elastic damping mechanism; 51. a spring slide; 52. a circular arc shaped spring; 6. a flange plate; 7. centrifugal pendulum protection casing.

Detailed Description

In order to make the above objects, features and advantages of the present invention more comprehensible, embodiments of the present invention are described in detail below with reference to the accompanying drawings. It should be noted that the drawings of the present invention are simplified and use non-precise ratios, and are only used for the purpose of facilitating and clearly assisting the description of the embodiments of the present invention.

The utility model provides a centrifugal pendulum formula dual mass flywheel, includes coaxial primary mass flywheel 1 and the secondary mass flywheel 2 that sets up, sets up the elasticity damper 5 between primary mass flywheel 1 and secondary mass flywheel 2, and elasticity damper 5 connects two parts flywheel as an organic whole, elasticity damper 5 can take place elastic deformation when primary mass flywheel 1 and secondary mass flywheel 2 rotate relatively. The primary mass flywheel 1 comprises a main flywheel 11 and a cover disc 14 which is coaxially arranged with the main flywheel 11 and fixedly connected with the main flywheel 11, wherein a cavity is formed between the outer ring of the main flywheel 11 and the outer ring of the cover disc 14, and a gear ring 12 and a signal gear ring 13 are sleeved on the main flywheel; the secondary mass flywheel comprises a dial plate 22 and a spline hub 21, the dial plate 22 is arranged between the cover plate 14 and the main flywheel 11, the spline hub 21 and the dial plate 22 are coaxially arranged and fixedly connected, and two or more blocking parts 221 are uniformly distributed on the dial plate 22 along the circumferential direction of the dial plate. The primary mass flywheel 1 is positioned on one side of an automobile engine and used for starting and transmitting the rotating torque of the engine, and the secondary mass flywheel 2 is positioned on one side of a transmission system and used for improving the rotating inertia of the transmission. Elastic damping mechanism 5 sets up in the cavity, and it includes circular arc spring 52 and spring slide 51, spring slide 51 sets up on the main flywheel 11 and be located in the cavity, stop part 221 will spring slide 51 evenly separates into a plurality of branch slides, circular arc spring 52 sets up in a plurality of branch slides after separating. The number of the branch chutes is adjusted by adjusting the number of the blocking parts 221 of the dial plate 22, so that the torsional rigidity of the dual-mass flywheel is adjusted.

The side of the secondary mass flywheel 2, which is far away from the primary mass flywheel 1, is connected with a retainer 3, preferably, the retainer 3 is connected to the secondary mass flywheel 2 through a flange plate 6, and the flange plate 6 is riveted with the drive plate 22 and the spline hub 21 through rivets.

At least one centrifugal pendulum 4 is uniformly distributed on the retainer along the circumference, a guide window 31 corresponding to the centrifugal pendulum 4 is arranged on the retainer 3, and the centrifugal pendulum 4 is arranged on the guide window 31.

The centrifugal pendulum comprises: the centrifugal pendulum 4 comprises two mass blocks 41 and a roller 43, the roller liner 45 penetrates through the guide window 31, the roller 43 is arranged in the guide window 31 and is matched with the roller liner 45, the roller 43 is used for guiding the centrifugal pendulum 4 to radially deflect along the guide window 31, in order to avoid the roller liner 45 from impacting the window to generate abnormal noise in the deflection process, a limiting block 44 is arranged in the guide window 31, the limiting block 44 is in interference fit with the roller liner 45, two ends of the limiting block 444 and two ends of the roller liner 45 are pressed on mounting holes of the mass blocks 41, and preferably, the limiting block 44 is a rubber limiting block. The two ends of the roller gasket 45 are respectively connected with the mass blocks 41, and the retainer 3 is clamped between the two mass blocks 41.

A friction gasket 42 is arranged between the mass block 41 and the end face of the retainer 3, and preferably, the friction gasket 42 is a plastic friction gasket. The guide window comprises two windows which are symmetrically distributed, and a roller 43, a roller gasket 45 and a limiting block 44 are arranged in each window. And a centrifugal pendulum protective cover 7 is arranged on the retainer.

When the engine runs, the torque and the rotating speed are sequentially transmitted to the primary flywheel 1 and the secondary flywheel 2 through the crankshaft, namely the secondary flywheel 2 is driven by the engine to run, so that certain inertia is provided for normal running of the engine, and certain energy is reserved.

Firstly, adopt the utility model discloses a dual mass flywheel, at the lower idle operating mode of engine speed, the rotatory centrifugal force that centrifugal pendulum 4 received is less, evenly distributed's centrifugal pendulum forms on the holder is also less, engine output less energy can maintain normal operation this moment, need not the great power of external output, consequently under the condition that does not influence the overall performance of engine, the oil consumption of idle operating mode has been reduced, dual mass flywheel's reduction of inertia, be favorable to reducing the oil consumption of engine. Under the running working condition that the rotating speed of the engine is high, the rotating centrifugal force borne by the centrifugal pendulum is large, the rotational inertia formed by the centrifugal pendulums uniformly distributed on the retainer is also large, the large rotational inertia of the dual-mass flywheel is beneficial to the running stability of the engine, the self vibration of the engine is effectively inhibited, and the comfort of the whole vehicle is improved.

Under the working condition that the rotating speed or the torque of the engine suddenly changes, such as the situation that a clutch driven disc is separated and combined, the emergency brake is carried out, and an accelerator pedal is stepped on suddenly, larger engine vibration and noise are formed, due to the action of centrifugal force, the centrifugal pendulum 4 moves along the radial direction of the retainer 3, the centrifugal pendulum 4 can instantaneously change the position of the centrifugal pendulum, the total inertia of the dual-mass flywheel is changed, the vibration caused by the torque or the sudden change of the rotating speed of the engine is absorbed, and the comfort of the whole vehicle is improved.

The utility model provides a two quality flywheel of centrifugal pendulum-type simple structure, manufacturing cost is lower relatively, and the performance is more stable. The centrifugal pendulum vibrates in a predetermined resonance range due to centrifugal force, and when the vibration of the centrifugal pendulum in the resonance range is superposed with the rotary motion of the dual-mass flywheel, the superposed vibration is eliminated by the vibration of the centrifugal pendulum, so that the suppression and isolation effects of the dual-mass flywheel on the vibration of the whole vehicle can be further improved, and the driving comfort is improved.

Various changes and modifications can be made by those skilled in the art without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims and their equivalents, the present invention is also intended to include such modifications and variations.

Claims

1. A centrifugal pendulum type dual-mass flywheel comprises a primary mass flywheel and a secondary mass flywheel which are coaxially arranged, and an elastic damping mechanism arranged between the primary mass flywheel and the secondary mass flywheel, wherein the elastic damping mechanism can generate elastic deformation when the primary mass flywheel and the secondary mass flywheel rotate relatively; a guide window corresponding to the centrifugal pendulum is arranged on the retainer; the centrifugal pendulum comprises two mass blocks and a roller, a roller gasket is arranged in the guide window in a penetrating mode, the roller is arranged in the guide window and matched with the roller gasket, two ends of the roller gasket are respectively connected with the mass blocks, and the retainer is clamped between the two mass blocks.

2. The centrifugal pendulum type dual mass flywheel of claim 1, wherein a stopper is further disposed in the guide window, the stopper is in interference fit with the roller pad, the stopper and the roller pad are press-fitted at two ends of the mass block into the mounting hole, and a friction pad is disposed between the mass block and the end face of the holder.

3. The centrifugal pendulum type dual mass flywheel of claim 1, wherein the primary mass flywheel comprises a main flywheel and a cover disc coaxially disposed and fixedly connected with the main flywheel, a cavity is formed between an outer ring of the main flywheel and an outer ring of the cover disc, and a gear ring and a signal gear ring are sleeved on the main flywheel; the secondary mass flywheel comprises a driving plate and a spline hub, the driving plate is arranged between the cover plate and the main flywheel, the spline hub and the driving plate are coaxially arranged and fixedly connected, and two or more blocking parts are distributed on the periphery of the driving plate along the circumferential direction of the driving plate.

4. The centrifugal-pendulum dual-mass flywheel of claim 3, wherein the elastic damping mechanism comprises a circular arc spring and a spring slideway, the spring slideway is disposed on the main flywheel and located in the cavity, the blocking portion divides the spring slideway into a plurality of sub-slideways, and the circular arc spring is disposed in the sub-slideway.

5. A centrifugal-pendulum dual mass flywheel according to claim 2 wherein said carrier is coupled to the secondary mass flywheel by a flange.

6. A centrifugal pendulum type dual mass flywheel according to claim 5 wherein said flange plate is riveted to a drive plate and a splined hub in the secondary mass flywheel by rivets.

7. The centrifugal-pendulum type dual mass flywheel of claim 1, wherein two or more guide windows are provided on the holder, and the guide windows are symmetrically distributed on the holder.

8. The centrifugal pendulum type dual mass flywheel of claim 2, wherein the stopper is a rubber stopper.

9. A centrifugal-pendulum dual mass flywheel according to claim 2 wherein said friction pads are plastic friction pads.

10. The centrifugal-pendulum type dual mass flywheel of claim 1, wherein said holder is provided with a centrifugal-pendulum shield.