1. An adaptive dynamic vibration reduction gear, characterized in that: the damping device comprises a gear (1), wherein a plurality of damping modules are embedded in the gear (1), each damping module comprises a damping mass block (2), a centrifugal mass block (5), an upper spring (3) and a lower spring (4), a mounting groove (7) is formed in the gear (1), the damping mass block (2) is fixed in the mounting groove (7), a connecting rod is further fixed on one side of the damping mass block (2), the other end of the connecting rod is fixed in the mounting groove (7), the centrifugal mass block (5) slides on the connecting rod, the upper spring (3) and the lower spring (4) are respectively arranged on two sides of the centrifugal mass block (5), the upper spring (3) and the lower spring (4) are sleeved on the connecting rod, one end of the upper spring (3) is abutted against the damping mass block (2), and the other end of the upper spring (3) is abutted against the centrifugal mass block (5, one end of the lower spring (4) is propped against the centrifugal mass block (5), and the other end of the lower spring is propped against the bottom of the mounting groove (7).

2. An adaptive power vibration reducing gear according to claim 1, wherein: guide rails (10) are fixed on two sides of the mounting groove (7), and the centrifugal mass block (5) is arranged on the guide rails (10) in a sliding mode.

3. An adaptive power vibration reducing gear according to claim 2, wherein: the two sides of the centrifugal mass block (5) are provided with sliding grooves, and the sliding blocks are arranged on the guide rails (10) in a sliding mode through the sliding grooves.

4. An adaptive power vibration reducing gear according to claim 1, wherein: a pin hole (11) is formed in one end, far away from the centrifugal mass block (5), of the connecting rod, a mounting hole (8) is also formed in the gear (1), and a pin shaft (9) penetrates through the mounting hole (8) and the pin hole (11) to fix the connecting rod on the gear (1).

5. An adaptive power vibration reducing gear according to claim 1, wherein: the center of the gear (1) is also connected with a transmission shaft (6).

Background

The gear system transmits power through the meshing of gear teeth, and when the rotating speed is close to or reaches the natural frequency of the system in the transmission process, the system can generate violent vibration noise, and the service life of the system is obviously shortened, even the system is directly broken and damaged.

In order to solve such problems, various vibration reduction gears have been proposed, including vibration reduction measures such as adding a vibration reduction pin, a rubber damping layer, and a dynamic vibration absorber inside the gear. The method of adding the vibration damping pin and the damping layer in the gear has certain effect, but the effect is limited for the working condition that the working speed is near the system resonance frequency. The method of adding the dynamic vibration absorber can realize that the vibration of the rotating speed working condition near the resonant frequency is obviously reduced, but the vibration absorbing frequency cannot be automatically adapted according to the increase of the rotating speed of the system.

Disclosure of Invention

The invention provides a self-adaptive dynamic vibration reduction gear, which aims to solve the problem that the conventional gear cannot automatically adapt to the vibration reduction frequency according to the increase of the system rotating speed, and comprises a gear, wherein a plurality of vibration reduction modules are embedded in the gear, each vibration reduction module comprises a vibration reduction mass block, a centrifugal mass block, an upper spring and a lower spring, a mounting groove is formed in the gear, the vibration reduction mass block is fixed in the mounting groove, a connecting rod is further fixed on one side of the vibration reduction mass block, the other end of the connecting rod is fixed in the mounting groove, the centrifugal mass block slides on the connecting rod, the upper spring and the lower spring are respectively arranged on two sides of the centrifugal mass block, the upper spring and the lower spring are sleeved on the connecting rod, one end of the upper spring abuts against the vibration reduction mass block, the other end abuts against the centrifugal mass block, and one end of the lower spring abuts against the centrifugal mass block, the other end is propped against the bottom of the mounting groove.

Preferably, guide rails are fixed to two sides of the mounting groove, and the centrifugal mass block is slidably disposed on the guide rails. The gear can produce centrifugal force at the rotation in-process, and centrifugal force can make centrifugal mass piece along keeping away from the direction motion at gear center, for making the mass piece can be accurate along keeping away from the direction motion at gear center, at the fixed guide rail that sets up in the both sides of mounting groove, centrifugal mass piece can slide along the direction of guide rail, moves more steadily.

Furthermore, sliding grooves are formed in two sides of the centrifugal mass block, and the sliding blocks are arranged on the guide rails in a sliding mode through the sliding grooves.

Preferably, a pin hole is formed in one end, far away from the centrifugal mass block, of the connecting rod, a mounting hole is also formed in the gear, and a pin shaft penetrates through the mounting hole and the pin hole to fix the connecting rod on the gear.

Further, the center of the gear is also connected with a transmission shaft. The transmission shaft transmits power to the gear,

has the advantages that: the invention realizes the purpose of self-adaptive vibration and noise reduction in a certain rotating speed range in the process of power transmission of the gear, is not limited to a certain fixed rotating speed, and realizes the purpose of vibration and noise reduction under the condition of not increasing the appearance and the space size of the gear.

Drawings

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is another schematic view of the overall structure of the present invention;

FIG. 3 is a schematic structural view of a damping module according to the present invention;

in the figure: 1. a gear; 2. a vibration damping mass block; 3. an upper spring; 4. a lower spring; 5. a centrifugal mass block; 6. a drive shaft; 7. mounting grooves; 8. mounting holes; 9. a pin shaft; 10. a guide rail; 11. a pin hole.

Detailed Description

In order to make the technical solutions of the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Reference herein to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic may be included in at least one implementation of the invention. In the description of the present invention, it is to be understood that the terms "upper", "top", "bottom", and the like, as used herein, refer to an orientation or positional relationship based on that shown in the drawings, which is for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, should not be taken as limiting the present invention. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. Moreover, the terms "first," "second," and the like are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or described herein.

Example 1

A self-adaptive dynamic vibration reduction gear comprises a gear 1, wherein a plurality of vibration reduction modules are embedded in the gear 1, the damping module comprises a damping mass 2, a centrifugal mass 5, an upper spring 3 and a lower spring 4, the gear 1 is provided with an installation groove 7, the vibration reduction mass block 2 is fixed in the installation groove 7, a connecting rod is fixed on one side of the vibration damping mass block 2, the other end of the connecting rod is fixed in the mounting groove 7, the connecting rod is provided with the centrifugal mass block 5 in a sliding manner, the two sides of the centrifugal mass block 5 are respectively provided with the upper spring 3 and the lower spring 4, and the upper spring 3 and the lower spring 4 are sleeved on the connecting rod, one end of the upper spring 3 is propped against the vibration damping mass block 2, the other end is propped against the centrifugal mass block 5, one end of the lower spring 4 is propped against the centrifugal mass block 5, and the other end of the lower spring is propped against the bottom of the mounting groove 7. The effective cantilever length between the centrifugal mass 5 and the damping mass 2 is L1 for controlling the support stiffness of the damping mass 2, the smaller the L1, the greater the support stiffness, wherein the design mass of the centrifugal mass 5 is M2 and the design mass of the damping mass 2 is M1. The eccentric distance of the centrifugal mass 5 is R, and the distance between the centrifugal mass 5 and the bottom surface of the mounting cavity of the gear wheel 1 in the initial non-working condition is L2. When the system starts to rotate, the centrifugal mass 5 generates a centrifugal force F due to the eccentricity R, and the centrifugal force F causes the centrifugal mass 5 to translate along the axial direction of the guide rail 10, i.e. the radial direction of the gear 1, in a direction away from the center of the gear 1, and to reach a static equilibrium state with the upper spring 3 after a certain distance of translation, at which time L1 is reduced, which means that the support stiffness of the damper mass 2 is increased.

Guide rails 10 are fixed on two sides of the mounting groove 7, and the centrifugal mass block 5 is arranged on the guide rails 10 in a sliding mode. In the rotation process of the gear 1, centrifugal force can be generated, the centrifugal mass 5 can move along the direction far away from the center of the gear 1 due to the centrifugal force, in order to enable the mass to accurately move along the direction far away from the center of the gear 1, guide rails 10 are fixedly arranged on two sides of the mounting groove 7, the centrifugal mass 5 can slide along the direction of the guide rails 10, and the movement is more stable.

The two sides of the centrifugal mass block 5 are provided with sliding grooves, and the sliding blocks are arranged on the guide rails 10 in a sliding mode through the sliding grooves.

The end, far away from the centrifugal mass block 5, of the connecting rod is provided with a pin hole 11, the gear 1 is also provided with a mounting hole 8, and a pin shaft 9 penetrates through the mounting hole 8 and the pin hole 11 to fix the connecting rod on the gear 1.

The center of the gear 1 is also connected with a transmission shaft 6. The transmission shaft 6 transmits power to the gear 1 so that the gear 1 can make a rotational motion.

The working principle is as follows:

1) when the gear 1 is in a non-working condition, the system rotating speed is equal to zero, and the centrifugal mass block 5 is positioned at the position closest to the axis under the combined action of the upper spring 3 and the lower spring 4;

2) when the system starts to work, the rotation speed of the gear 1 starts to increase gradually, which means that the working frequency omega of the system is increased gradually₁The synchronization is increased, the centrifugal mass 5 starts to translate axially along the guide rail 10 under the combined action of the centrifugal force F and the upper spring 3, so that L1 is reduced, and L1 is the cantilever length of the damping mass 2, which is reduced, i.e. the support stiffness k of the damping mass 2 is increased, according to the system natural frequency formula:it can be seen that as k increases, the natural frequency ω₂Also synchronously increased, and ensures omega by using detailed structural design₁And ω₂Under different rotating speeds and within a certain rotating speed range, the vibration damping module can be in an approximate or equal state, so that the vibration damping module can automatically adapt to different working rotating speeds, and the optimal vibration damping effect under different rotating speeds is obtained without external interference;

3) when the rotation speed is gradually reduced and reduced to 0, the centrifugal mass 5 returns to the initial position state.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.