CN111927921A - Planetary gear type centrifugal pendulum damper - Google Patents

Abstract

The invention discloses a planetary gear type centrifugal pendulum damper. At least one pendulum sub-assembly is mounted on a bushing plate, and the number of planetary gears equal to the number of pendulum sub-assemblies is mounted on the bushing plate. A scroll spring is installed in the middle, the outer gear of the planetary gear meshes with the intermediate plate gear of the pendulum subassembly, and the movement of the planetary gear controls the movement track of the pendulum subassembly. The advantage of the invention is that the planetary gear structure is used to limit the working track of the centrifugal pendulum, so that the pendulum can only work on the track that produces the vibration damping effect, so as to prevent the occurrence of abnormal knocking noise.

Description

Planetary gear type centrifugal pendulum damper

technical field

The invention relates to a torsional shock absorber of an automobile powertrain system, in particular to a planetary gear type centrifugal pendulum shock absorber.

Background technique

The centrifugal pendulum shock absorber is mainly used in the powertrain system of the car, and is usually installed between the engine and the gearbox to provide the car with the function of reducing vibration and noise.

Due to its own structural characteristics, the current centrifugal pendulum shock absorber requires the pendulum to swing freely during the vibration reduction effect. If the matching is good, it generally has good vibration reduction performance at high engine speeds. However, because of the flexible swing of the pendulum, in the working area with low rotation speed such as engine starting, due to factors such as relatively low centrifugal force and large engine vibration, the pendulum cannot guarantee the ideal motion trajectory, and may cause knocking due to irregular motion. Abnormal noise, poor vibration reduction effect, etc. With the continuous improvement of the comfort requirements of the whole vehicle, it is necessary to provide a more stable and reliable centrifugal pendulum shock absorber to meet the demand.

The Chinese patent (CN102141113B) discloses a centrifugal pendulum shock absorber, which is implemented by movably connecting a plurality of pendulums through the first plate to realize the function of centrifugal pendulum, because there is no good structure between the pendulum and the first plate Constraint and positioning, in the state of low centrifugal force and high speed fluctuation of the centrifugal pendulum caused by low speed conditions such as engine start, flameout, downhill, etc., the vibration reduction effect will become poor due to the pendulum not moving according to the ideal working trajectory. noise, etc.

This is where this application needs to focus on improving.

SUMMARY OF THE INVENTION

The technical problem to be solved by the present invention is to provide a planetary gear type centrifugal pendulum shock absorber, which can improve the working stability and vibration reduction performance of the centrifugal pendulum.

In order to solve the above technical problems, the present invention provides a planetary gear type centrifugal pendulum damper. At least one pendulum sub-assembly is installed on the sleeve plate, and the number of pendulum sub-assemblies is installed on the sleeve plate. The planetary gear is equipped with a scroll spring, the outer gear of the planetary gear meshes with the intermediate plate gear of the pendulum subassembly, and the movement of the planetary gear controls the movement track of the pendulum subassembly. The pendulum can only work on the trajectory that produces the vibration reduction effect, so as to prevent the occurrence of abnormal knocking.

The scroll spring is provided with an inner flanging, an outer flanging and a limit surface of the scroll spring, the outer flanging passes through the scroll spring mounting hole of the planetary gear, and the inner flanging is embedded in the scroll of the planetary gear. The spring fixes the shaft, the scroll spring is installed in the scroll spring installation groove of the planetary gear, and the outer flange moves in the swing angle space of the planetary gear. When the pendulum sub-assembly moves to the limit position, the scroll spring The limit surface is in contact with the limit surface of the planetary gear to control the movement track of the pendulum sub-assembly.

The planetary gear is also provided with a sliding step and a sliding surface. The sliding step clamps the upper end surface and the lower end surface of the bushing plate to position the planetary gear axially. The hole-surface contact produces damping during the centrifugal pendulum operation and ensures the normal operation of the planetary gear; the intermediate plate gear of the pendulum sub-assembly drives the planetary gear to move, and the planetary gear drives the scroll spring to generate additional stiffness and damping.

The pendulum sub-assembly includes at least one intermediate plate and at least one pendulum weight, the intermediate plate is provided with a mass block and an intermediate plate gear, and the mass block adjusts the overall mass of the pendulum sub-assembly according to requirements.

The pendulum sub-assembly is assembled with the bushing plate through at least one roller, and the rollers respectively pass through the fixing holes on the bushing plate and the pendulum weight block.

The shaft sleeve plate is provided with a semicircular hole and a groove on the sleeve plate, and the outer flange of the scroll spring is embedded in the groove and fixed.

The superior effect of the structure of the present invention is:

1) This application uses the planetary gear structure to limit the working trajectory of the centrifugal pendulum, so that the pendulum can only work on the trajectory that produces the vibration damping effect, preventing the generation of abnormal knocking noise;

2) In this application, the scroll spring is used to provide additional stiffness and damping for the centrifugal pendulum, and there is more room for optimization in the process of vehicle matching;

3) The application is applied to the structure of parts and components that transmit power such as dual-mass flywheels, clutches, and torque converters, which reduces the vibration and noise of the powertrain and improves the service life of the parts.

Description of drawings

The accompanying drawings forming a part of the present application are used to provide further understanding of the present invention, and the exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the attached image:

1 is a schematic cross-sectional view of an assembly of an embodiment of the present invention;

FIG. 2 is a schematic cross-sectional view of the assembly in the direction A-A of FIG. 1;

3 is a partial schematic diagram of a pendulum sub-assembly according to an embodiment of the present invention;

4 is a schematic diagram of a middle plate of a pendulum sub-assembly according to an embodiment of the present invention;

5 is a schematic diagram of a planetary gear according to an embodiment of the present invention;

6 is a schematic diagram of a spiral spring according to an embodiment of the present invention;

1 - Bushing plate;

101-semi-circular hole of bushing plate; 102-groove;

2- roller; 3- pendulum weight;

4 - middle plate;

401 - rivet hole; 402 - mass block;

403 - Intermediate plate gear;

5 - rivet pin;

6 - planetary gear;

601-External gear; 602-Scroll spring fixed shaft;

603 - sliding step; 604 - planetary gear limit surface;

605 - scroll spring installation groove; 606 - sliding surface;

607-swing angle space; 608-scroll spring mounting hole;

7 - scroll spring;

701 - inner flange; 702 - outer flange;

703 - Scroll spring limit surface.

Detailed ways

The embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

1 is a schematic cross-sectional view of the assembly of the present invention, FIG. 2 is a schematic cross-sectional view of the assembly in the direction A-A of FIG. 1 , FIG. 3 is a partial schematic view of the assembly of the present invention, FIG. 4 is a schematic view of the intermediate plate parts of the present invention, and FIG. Schematic diagram of gear parts, FIG. 6 is a schematic diagram of the scroll spring parts of the present invention.

As shown in FIG. 1 and FIG. 2 , the planetary gear type centrifugal pendulum damper includes a bushing plate 1 , a roller 2 , a pendulum weight 3 , an intermediate plate 4 , a rivet pin 5 , a planetary gear 6 , and a scroll spring 7 In this embodiment, two intermediate plates 4, two pendulum weights 3 and four rivet pins 5 are riveted through the rivet holes 401 to form a pendulum sub-assembly as an example, and four pendulum sub-assemblies are composed of centrifugal pendulum vibration damping Taking the pendulum as an example, in practical applications, the number of pendulum sub-assemblies used and the components included in the pendulum sub-assembly can be adjusted arbitrarily according to specific conditions.

As shown in FIG. 3 , the pendulum sub-assembly is assembled with the bushing plate 1 through two rollers 2 , and the rollers 2 pass through the waist-shaped holes arranged on the bushing plate 1 and the pendulum weight 3 respectively.

The scroll spring 7 is assembled in the planetary gear 6 . As shown in FIG. 6 , the scroll spring 7 is provided with an inner flange 701 , an outer flange 702 and a scroll spring limiting surface 703 . As shown in FIG. 5, the planetary gear 6 is provided with an external gear 601, a scroll spring fixed shaft 602, a sliding step 603, a planetary gear limiting surface 604, a scroll spring mounting groove 605, a sliding surface 606, a swing angle space 607, The scroll spring installation hole 608, the outer flange 702 passes through the scroll spring installation hole 608, the inner flange 701 is embedded in the scroll spring fixing shaft 602, and the entire scroll spring 7 is installed into the scroll spring installation groove 605 by this.

As shown in Figure 1, the sleeve plate 1 is provided with a semicircular hole 101 and a groove 102. The sleeve plate 1 has two end faces in the thickness direction, which are the upper end face and the lower end face, respectively. The distance between the two end faces is Thickness of the bushing sheet. As shown in FIG. 4 , the intermediate plate 4 is provided with a mass block 402 and an intermediate plate gear 403 , and the mass block 402 adjusts the overall mass of the pendulum sub-assembly according to requirements. The planetary gear 6 equipped with the scroll spring 7 is inserted into the semicircular hole 101 of the sleeve plate, the outer flange 702 is embedded in the groove 102 and fixed, and the sliding step 603 is stuck on the upper end surface and the lower end surface of the sleeve plate 1 , plays the role of the axial positioning of the planetary gear 6, the sliding surface 606 is in contact with the inner hole surface of the semicircular hole 101 of the bushing plate, damping is generated during the centrifugal pendulum operation and the normal operation of the planetary gear structure is ensured. The gear 601 meshes with the intermediate plate gear 403, and the pendulum sub-assembly has a stable movement track through the movement of the planetary gear. During the movement of the pendulum sub-assembly, the intermediate plate gear 403 drives the planetary gear 6 to move, and the planetary gear 6 drives the scroll spring 7 to generate stiffness during the back and forth rotation. Moving in the angular space 607, when the pendulum sub-assembly moves to the limit position, the scroll spring limiting surface 703 contacts the planetary gear limiting surface 604 to limit the movement space of the pendulum sub-assembly.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims (6)

1. The utility model provides a planetary gear formula centrifugation pendulum shock absorber, is equipped with at least one pendulum sub-assembly on the axle sleeve board, its characterized in that: planetary gears with the same number as the pendulum bob subassemblies are mounted on the shaft sleeve plate, volute spiral springs are mounted in the planetary gears, outer gears of the planetary gears are meshed with gears of a middle plate of the pendulum bob subassemblies, and the motion of the planetary gears controls motion tracks of the pendulum bob subassemblies.

2. The planetary gear centrifugal pendulum absorber of claim 1, wherein: the pendulum bob sub-assembly is characterized in that an inner flanging, an outer flanging and a volute spring limiting surface are arranged on the volute spring, the outer flanging penetrates through a volute spring mounting hole of the planetary gear, the inner flanging is embedded into a volute spring fixing shaft of the planetary gear, the volute spring is installed in a volute spring mounting groove of the planetary gear, the outer flanging moves in a swing angle space of the planetary gear, and when the pendulum bob sub-assembly moves to a limit position, the volute spring limiting surface is in contact with the planetary gear limiting surface to control the motion track of the pendulum bob sub-assembly.

3. The planetary gear centrifugal pendulum absorber according to claim 1 or 2, wherein: the pendulum bob sub-assembly is characterized in that the planetary gear is further provided with a sliding step and a sliding surface, the sliding step clamps the upper end surface and the lower end surface of the shaft sleeve plate to axially position the planetary gear, the sliding surface is in contact with an inner hole surface of a semicircular hole of the shaft sleeve plate, the intermediate plate gear of the pendulum bob sub-assembly drives the planetary gear to move, and the planetary gear drives the volute spiral spring to generate extra rigidity and damping in the process of back-and-forth rotation.

4. The planetary gear centrifugal pendulum absorber of claim 1, wherein: the pendulum sub-assembly comprises at least one middle plate and at least one pendulum weight, a mass block and a middle plate gear are arranged on the middle plate, and the mass block adjusts the overall mass of the pendulum sub-assembly according to requirements.

5. The planetary gear centrifugal pendulum absorber of claim 4, wherein: the pendulum sub-assembly is assembled with the shaft sleeve plate through at least one roller, and the rollers respectively penetrate through the shaft sleeve plate and the fixing holes in the pendulum weights.

6. The planetary gear centrifugal pendulum absorber of claim 1, wherein: the shaft sleeve plate is provided with a shaft sleeve plate semicircular hole and a groove, and an outward flange of the volute spiral spring is embedded into the groove for fixing.

Images