阅读说明：本技术 传动轴动力吸振器 (Dynamic vibration absorber of transmission shaft ) 是由 刘国政 张俊 张伟 凌雯 熊云亮 于 2020-12-03 设计创作，主要内容包括：本发明揭示了一种传动轴动力吸振器,包括：外筒、内筒、橡胶筒、刚度调节机构和配重机构。内筒位于外筒的内侧,内筒夹紧传动轴。橡胶筒的内壁与内筒硫化在一起。刚度调节机构的内侧端与橡胶筒的外壁硫化在一起,刚度调节机构安装在外筒上,刚度调节机构能压紧橡胶筒使得橡胶筒产生形变,橡胶筒的径向形变改变橡胶筒的径向刚度,使得传动轴动力吸振器的径向刚度改变。配重机构安装在外筒上,配重机构调节传动轴动力吸振器的质量。本发明的传动轴动力吸振器通过给橡胶施加径向预压缩量,调节动力吸振器的刚度,通过改变配重环的数量调节动力吸振器的质量,从而改变动力吸振器的频率。(The invention discloses a dynamic vibration absorber of a transmission shaft, which comprises: the device comprises an outer cylinder, an inner cylinder, a rubber cylinder, a rigidity adjusting mechanism and a counterweight mechanism. The inner cylinder is positioned at the inner side of the outer cylinder and clamps the transmission shaft. The inner wall of the rubber cylinder and the inner cylinder are vulcanized together. The inner side end of the rigidity adjusting mechanism is vulcanized with the outer wall of the rubber cylinder, the rigidity adjusting mechanism is installed on the outer cylinder, the rigidity adjusting mechanism can tightly press the rubber cylinder to enable the rubber cylinder to deform, and the radial deformation of the rubber cylinder changes the radial rigidity of the rubber cylinder, so that the radial rigidity of the dynamic vibration absorber of the transmission shaft changes. The counterweight mechanism is arranged on the outer barrel and adjusts the mass of the dynamic vibration absorber of the transmission shaft. The dynamic vibration absorber of the transmission shaft of the invention adjusts the rigidity of the dynamic vibration absorber by applying radial precompression quantity to rubber and adjusts the mass of the dynamic vibration absorber by changing the quantity of the counterweight rings, thereby changing the frequency of the dynamic vibration absorber.)

1. A drive shaft dynamic vibration absorber, comprising:

the inner cylinder is positioned on the inner side of the outer cylinder, and the inner cylinder clamps the transmission shaft;

the inner wall of the rubber cylinder and the inner cylinder are vulcanized together;

the inner side end of the rigidity adjusting mechanism is vulcanized with the outer wall of the rubber cylinder, the rigidity adjusting mechanism is installed on the outer cylinder and can tightly press the rubber cylinder to enable the rubber cylinder to deform, and the radial deformation of the rubber cylinder changes the radial rigidity of the rubber cylinder, so that the radial rigidity of the dynamic vibration absorber of the transmission shaft is changed;

and the counterweight mechanism is arranged on the outer barrel and used for adjusting the mass of the transmission shaft dynamic vibration absorber.

2. The driveshaft dynamic vibration absorber of claim 1, wherein said stiffness adjustment mechanism comprises:

the pressing plates are arranged on the outer side surfaces of the tiles, and the pressing plate pins are arranged on the sliding plates;

the gear ring is provided with a boss and gear ring pin columns, each gear ring pin column is connected with one pressing sheet pin column through a connecting rod, the gear ring is installed on the outer barrel and can rotate relative to the outer barrel, the gear ring rotates relative to the outer barrel, the pressing sheet is driven to move radially through the connecting rods, and the pressing sheet moves radially to enable the rubber barrel to deform radially.

3. The propeller shaft dynamic vibration absorber of claim 2,

the inner wall of the outer cylinder is provided with a plurality of sliding grooves which extend along the radial direction, the sliding plate of the pressing sheet is embedded into the sliding grooves, the sliding plate moves in the sliding grooves to drive the pressing sheet to move along the radial direction,

the both ends of urceolus have ring gear mounting structure, ring gear mounting structure includes:

the accommodating groove is a notch positioned at the end part of the outer cylinder, and the boss of the gear ring is placed in the accommodating groove;

the adjusting screw hole and the adjusting screw are formed in two sides of the accommodating groove, the adjusting screw is screwed into the adjusting screw hole and pushes the boss, and the gear ring is driven to rotate relative to the outer barrel through the boss;

the locking screw hole is formed in the wall of the outer barrel, and the locking screw penetrates through the locking screw hole and abuts against the gear ring to lock the gear ring.

4. The driveshaft dynamic vibration absorber of claim 3, wherein said gear ring has a diameter matching a diameter of the outer cylinder, an outer edge of the gear ring being proximate to an inner wall of the outer cylinder, the gear ring having a scale thereon, the outer cylinder having indicia thereon, the scale and indicia indicating an angle of rotation of the gear ring relative to the outer cylinder.

5. The propeller shaft dynamic vibration absorber of claim 3 wherein said outer barrel has a raised mounting flange at a central portion thereof, said mounting flange having a counterweight mounting hole therein.

6. The dynamic vibration absorber of claim 5, wherein said weight means is an annular weight having a diameter matching the diameter of the outer cylinder, the annular weight being fitted over the outside of the outer cylinder and fixed in the weight mounting hole by a fixing screw.

7. The driveshaft dynamic-vibration absorber of claim 6, wherein the number of annular weights is adjusted to adjust the mass of said driveshaft dynamic-vibration absorber.

8. The dynamic vibration absorber of claim 1, wherein the inner tube has a mounting slit parallel to its axis, the mounting slit having clamping screw holes on both sides, and the clamping screws are screwed into the clamping screw holes so that the inner tube clamps the transmission shaft.

9. The driveshaft dynamic vibration absorber of claim 8, wherein the inner cylinder has flanges at both ends thereof, the inner wall of the rubber cylinder is vulcanized to the outer surface of the inner cylinder, the both ends of the rubber cylinder are vulcanized to the inner side of the flanges of the inner cylinder, and the flanges restrict axial deformation of the rubber cylinder such that the deformation of the rubber cylinder is concentrated in the radial direction.

10. The driveshaft dynamic vibration absorber of claim 1, wherein the radial stiffness of the rubber tube increases as the amount of radial compression of the rubber tube increases, the radial stiffness of the rubber tube being non-linear with respect to the amount of radial compression of the rubber tube.

Technical Field

The invention relates to the field of automobile parts, in particular to a vibration reduction part of a transmission shaft.

Background

The dynamic vibration absorber is widely applied to the field of vibration and noise reduction, can attenuate the vibration amplitude of a mechanical structure at specific frequency, and improves the riding comfort of the whole vehicle. For a front-engine front-drive automobile, a transmission shaft is generally of a solid slender shaft structure, and due to excitation of an engine, the transmission shaft can resonate at a specific frequency in a rotating process, so that vibration noise in the automobile is increased abnormally, and the riding comfort of the automobile is influenced. In order to eliminate the resonance of the transmission shaft, a dynamic vibration absorber is generally adopted to reduce the vibration amplitude of the transmission shaft at a specific frequency.

For a traditional transmission shaft dynamic vibration absorber, the traditional transmission shaft dynamic vibration absorber generally comprises cylindrical rubber and a metal block, wherein the rubber is an elastic part, the metal block is a mass block, the inner side of the rubber is vulcanized with a transmission shaft, and the outer side of the rubber is vulcanized with a metal cylinder, so that the resonance of the transmission shaft can be attenuated. But the rubber stiffness of the dynamic vibration absorber and the mass of the metal mass are fixed and therefore the frequency of the dynamic vibration absorber is also fixed. Therefore, one dynamic vibration absorber in the prior art can only be matched with one transmission shaft, and different dynamic vibration absorbers are required to be redesigned and manufactured for different vehicle types, so that the universality of the dynamic vibration absorber is poor.

Disclosure of Invention

The invention provides a dynamic vibration absorber capable of adjusting resonance frequency to adapt to transmission shafts of different vehicle types.

According to an embodiment of the present invention, a dynamic vibration absorber for a transmission shaft is provided, which includes: the device comprises an outer cylinder, an inner cylinder, a rubber cylinder, a rigidity adjusting mechanism and a counterweight mechanism. The inner cylinder is positioned at the inner side of the outer cylinder and clamps the transmission shaft. The inner wall of the rubber cylinder and the inner cylinder are vulcanized together. The inner side end of the rigidity adjusting mechanism is vulcanized with the outer wall of the rubber cylinder, the rigidity adjusting mechanism is installed on the outer cylinder, the rigidity adjusting mechanism can tightly press the rubber cylinder to enable the rubber cylinder to deform, and the radial deformation of the rubber cylinder changes the radial rigidity of the rubber cylinder, so that the radial rigidity of the dynamic vibration absorber of the transmission shaft changes. The counterweight mechanism is arranged on the outer barrel and adjusts the mass of the dynamic vibration absorber of the transmission shaft.

In one embodiment, the stiffness adjustment mechanism comprises: a plurality of pressing sheets and gear rings. Each preforming includes arc tile, slide and preforming round pin post, and the outer wall of a rubber section of thick bamboo is hugged closely and is vulcanized together with the outer wall of a rubber section of thick bamboo to the inside surface of tile, and the slide is located the outside surface of tile, and preforming round pin post is installed on the slide. The gear ring is provided with a boss and gear ring pin columns, each gear ring pin column is connected with one pressing sheet pin column through a connecting rod, the gear ring is installed on the outer barrel and can rotate relative to the outer barrel, the gear ring rotates relative to the outer barrel, the pressing sheet is driven to move radially through the connecting rod, and the pressing sheet moves radially to enable the rubber barrel to deform radially.

In one embodiment, the inner wall of the outer cylinder is provided with a plurality of sliding grooves, the sliding grooves extend along the radial direction, the sliding plates of the pressing sheets are embedded into the sliding grooves, and the sliding plates move in the sliding grooves to drive the pressing sheets to move along the radial direction. Both ends of urceolus have ring gear mounting structure, and ring gear mounting structure includes: the holding tank, adjust screw and adjusting screw, locking screw and locking screw. The holding tank is the breach that is located the urceolus tip, and the boss of ring gear is placed in the holding tank. The both sides of holding tank are opened has the regulation screw, and adjusting screw twists the regulation screw and promote the boss, drives the ring gear through the boss and rotates for the urceolus. The locking screw hole is formed in the wall of the outer barrel, and the locking screw penetrates through the locking screw hole and abuts against the gear ring to lock the gear ring.

In one embodiment, the diameter of the gear ring is matched with that of the outer cylinder, the outer edge of the gear ring is close to the inner wall of the outer cylinder, the gear ring is provided with a graduated scale, the outer cylinder is provided with mark points, and the graduated scale and the mark points indicate the rotation angle of the gear ring relative to the outer cylinder.

In one embodiment, the outer barrel has a raised mounting flange at a central portion thereof, and the mounting flange has a counterweight mounting hole therein.

In one embodiment, the counterweight mechanism is an annular counterweight, the diameter of the annular counterweight is matched with that of the outer barrel, and the annular counterweight is sleeved outside the outer barrel and is fixed in the counterweight mounting hole through a fixing screw.

In one embodiment, the number of annular weights is adjusted to adjust the mass of the driveshaft dynamic absorber.

In one embodiment, the inner cylinder has a mounting slot parallel to its axis, and the mounting slot has clamping screw holes on both sides, and a clamping screw is screwed into the clamping screw holes so that the inner cylinder clamps the transmission shaft.

In one embodiment, the inner cylinder has flanges at both ends, the inner wall of the rubber cylinder is vulcanized with the outer surface of the inner cylinder, the both ends of the rubber cylinder are vulcanized with the inner side of the flange of the inner cylinder, and the flanges limit the axial deformation of the rubber cylinder so that the deformation of the rubber cylinder is concentrated in the radial direction.

In one embodiment, the radial stiffness of the rubber tube increases with increasing radial compression of the rubber tube, and the radial stiffness of the rubber tube is non-linear with respect to radial compression of the rubber tube.

The dynamic vibration absorber of the transmission shaft of the invention adjusts the rigidity of the dynamic vibration absorber by applying radial precompression quantity to rubber and adjusts the mass of the dynamic vibration absorber by changing the quantity of the counterweight rings, thereby changing the frequency of the dynamic vibration absorber. The dynamic vibration absorber for the transmission shaft can effectively avoid the defects of the traditional scheme, is convenient to install and adjust, can be suitable for transmission shafts with different structures, and has wider application prospect in the field of vibration and noise reduction of automobiles.

Drawings

Fig. 1 discloses an exploded structure view of a propeller shaft dynamic vibration absorber according to an embodiment of the present invention.

Fig. 2 discloses a structural view of an inner tube in the propeller shaft dynamic vibration absorber according to an embodiment of the present invention.

Fig. 3 discloses a structural diagram of a rubber tube in the dynamic vibration absorber of a transmission shaft according to an embodiment of the invention.

Fig. 4 discloses a structure diagram of a pressing sheet in the dynamic vibration absorber of a transmission shaft according to an embodiment of the invention.

Fig. 5 discloses a structural view of a ring gear in the propeller shaft dynamic vibration absorber according to an embodiment of the present invention.

Fig. 6 discloses a structural diagram of a connecting rod in the transmission shaft dynamic vibration absorber according to an embodiment of the invention.

Fig. 7 discloses a structural view of an outer cylinder in the propeller shaft dynamic vibration absorber according to an embodiment of the present invention.

Fig. 8 discloses a structural diagram of an annular weight block in a transmission shaft dynamic vibration absorber according to an embodiment of the invention.

Fig. 9 discloses a combined structure of the dynamic vibration absorber of the transmission shaft according to an embodiment of the invention.

Fig. 10 discloses a stiffness curve of the propeller shaft dynamic vibration absorber according to an embodiment of the present invention as the ring gear rotates.

Detailed Description

Referring to fig. 1, fig. 1 is an exploded view of a dynamic vibration absorber of a propeller shaft according to an embodiment of the present invention. The transmission shaft dynamic vibration absorber comprises: the device comprises an outer cylinder 2, an inner cylinder 3, a rubber cylinder 4, a rigidity adjusting mechanism and a counterweight mechanism.

The inner cylinder 3 is positioned at the inner side of the outer cylinder 2, and the inner cylinder 3 clamps the transmission shaft. Fig. 2 discloses a structural view of an inner tube in the propeller shaft dynamic vibration absorber according to an embodiment of the present invention. Referring to fig. 1 and 2, the inner cylinder 3 has a mounting slot 17 parallel to its axis, the mounting slot 17 has clamping screw holes 18 on both sides, and the clamping screw 11 is screwed into the clamping screw holes 18 to clamp the inner cylinder 3 to the transmission shaft. The position of the inner cylinder can be adjusted along the transmission shaft by loosening the clamping screw 11 and loosening the fastening of the inner cylinder and the transmission shaft. With continued reference to figure 2, the inner barrel 3 has flanges at both ends. The rubber tube 4 is arranged outside the inner tube, and the inner wall of the rubber tube 4 and the inner tube 3 are vulcanized together. Fig. 3 discloses a structural diagram of a rubber tube in the dynamic vibration absorber of a transmission shaft according to an embodiment of the invention. The inner wall of the rubber tube 4 and the outer surface of the inner tube 3 are vulcanized together, and both ends of the rubber tube and the inner side of the flange of the inner tube are also vulcanized together. The flange can restrict the axial deformation of rubber cylinder 3, and when the rubber cylinder compressive deformation, because the axial receives the restriction of flange, the deformation of rubber cylinder is more concentrated in radially for radial deformation is showing more, can adjust radial rigidity better.

The inner side end of the rigidity adjusting mechanism is vulcanized with the outer wall of the rubber cylinder, the rigidity adjusting mechanism is installed on the outer cylinder, the rigidity adjusting mechanism can tightly press the rubber cylinder to enable the rubber cylinder to deform, and the radial deformation of the rubber cylinder changes the radial rigidity of the rubber cylinder, so that the radial rigidity of the dynamic vibration absorber of the transmission shaft changes. In one embodiment, the stiffness adjustment mechanism includes a plurality of pressure plates 5, links 6, and ring gears 7. Fig. 4, 5, and 6 disclose structural diagrams of components constituting the rigidity adjusting mechanism, wherein fig. 4 discloses a structural diagram of a pressure sheet, fig. 5 discloses a structural diagram of a ring gear, and fig. 6 discloses a structural diagram of a link. As shown, a plurality of pressing plates 5 are closely attached to the outer side of the rubber tube 4, the plurality of pressing plates 5 substantially surround the entire periphery of the rubber tube 4, and in one embodiment, 8 pressing plates 5 are circularly formed in a cylindrical shape to surround the outer side of the rubber tube 4. Each pressing plate 5 comprises an arc-shaped tile 21, a sliding plate 19 and a pressing plate pin 20. The inner side surface of the tile 21 is tightly adhered to the outer wall of the rubber cylinder 4 and is vulcanized with the outer wall of the rubber cylinder, and the tile 21 forms an arc line and the radian is matched with the radian of the rubber cylinder. A slide plate 19 is located on the outer surface of the tile 21 and a wafer pin 20 is mounted on the slide plate 19. The slide plate 19 is inserted into the slide groove 16 of the outer cylinder 2 to guide the pressing piece 5 to move radially. The gear ring 7 is provided with a boss 23 and a gear ring pin 24. Each ring gear pin 24 is connected to one of the tablet pins 20 by a link 6. The ring gear 7 is mounted on the outer cylinder 2 and can rotate relative to the outer cylinder 2. When the gear ring 7 rotates relative to the outer cylinder 2, the gear ring pin 24 displaces, the gear ring pin 24 drives the pressing sheet 5 to move radially in the sliding groove 16 through the connecting rod 6, and the pressing sheet 5 moves radially (contracts inwards) to press the rubber cylinder 4, so that the rubber cylinder 4 deforms radially.

Fig. 7 discloses a structural view of an outer cylinder in the propeller shaft dynamic vibration absorber according to an embodiment of the present invention. The inner wall of the outer barrel 2 is provided with a plurality of sliding grooves 16, the sliding grooves 16 extend along the radial direction, the number of the sliding grooves 16 is equal to that of the pressing sheets 5, and the sliding grooves 16 correspond to the pressing sheets 5 one to one. The slide plate 19 of the pressing piece 5 is fitted into the slide groove 16, and the slide plate 19 moves in the slide groove 16 to guide the pressing piece 5 to move in the radial direction. Both ends of the outer cylinder 2 have a ring gear mounting structure, which in the illustrated embodiment comprises: the receiving groove 26, the adjustment screw hole 12 and the adjustment screw 1, the locking screw hole 15 and the locking screw 10. In the illustrated embodiment, the diameter of the gear ring 7 matches the diameter of the outer cylinder 2, the outer diameter of the gear ring 7 being slightly smaller than the inner diameter of the outer cylinder 2. The outer edge of the ring gear 7 abuts the inner wall of the outer barrel 2. The receiving groove 26 is a notch at the end of the outer cylinder 2 and the boss 23 of the ring gear 7 is placed in the receiving groove 26. The width of the receiving groove 26 is larger than the width of the projection 23, so that the projection 23 can move in the receiving groove 26, which movement brings the toothed ring 7 into rotation relative to the outer cylinder 2. Adjusting screw holes 12 are formed in two sides of the accommodating groove 26, and the adjusting screws 1 are screwed into the adjusting screw holes 12. The adjusting screw contacts with the boss 23 and pushes the boss 23, and the gear ring 7 is driven to rotate relative to the outer cylinder 2 through the boss 23. A locking screw hole 15 is opened in the wall of the outer cylinder 2, and a locking screw 10 passes through the locking screw hole 15 and abuts against the ring gear 7 to lock the ring gear 7. In the illustrated embodiment, the gear ring 7 has a scale 22 thereon and the outer cylinder has a marker 14 thereon, the scale 22 and marker 14 indicating the angle of rotation of the gear ring 7 relative to the outer cylinder 2. When the radial rigidity needs to be adjusted, the locking screw 10 is loosened, so that the gear ring 7 can rotate, then the adjusting screw 1 is screwed, the boss 23 is pushed to move, the gear ring 7 is driven to rotate, and the graduated scale 22 and the mark point 14 are referred to. After the ring gear 7 is rotated into position, tightening the locking screw 10 fixes the ring gear 7 relative to the outer cylinder 2.

The counterweight mechanism is arranged on the outer barrel and adjusts the mass of the dynamic vibration absorber of the transmission shaft. In the illustrated embodiment, the counterweight mechanism is a ring-shaped counterweight 8. Fig. 8 discloses a structural diagram of an annular weight block in a transmission shaft dynamic vibration absorber according to an embodiment of the invention. The diameter of the annular balancing weight 8 is matched with that of the outer barrel 2, and the outer diameter of the outer barrel 2 is slightly smaller than the inner diameter of the annular balancing weight 8. The middle part of the outer cylinder 2 is provided with a convex mounting flange, and the mounting flange is provided with a counterweight mounting hole 13. The annular balancing weight 8 is sleeved outside the outer barrel 2 and is fixed in the balancing weight mounting hole 13 through the fixing screw 9. The mass of the dynamic vibration absorber of the transmission shaft can be adjusted by adjusting the number of the annular balancing weights 8. Referring to fig. 1 and 7, the transmission shaft dynamic vibration absorber is a left-right pair structure as a whole, the two ends of the outer cylinder 2 are respectively provided with the gear rings 7, the two sides of the outer cylinder 2 can be provided with the annular balancing weights 8, different numbers of the annular balancing weights 8 can be selected according to different required qualities, and in the illustrated embodiment, the number of the annular balancing weights 8 is changed from 1 to 4.

Fig. 9 discloses a combined structure view of the propeller shaft dynamic vibration absorber according to an embodiment of the present invention, showing a state after the propeller shaft dynamic vibration absorber is assembled and molded.

The basic principle of the invention is to adjust the resonance frequency of the dynamic vibration absorber of the transmission shaft by adjusting the radial rigidity and the mass. The radial rigidity of the dynamic vibration absorber of the transmission shaft is realized by adjusting the radial rigidity of the rubber cylinder, and the adjusting quality is realized by adjusting the number of the annular balancing weights. The rubber cylinder is stressed, so that the rubber cylinder is radially deformed, and the radial rigidity of the rubber cylinder is changed. Due to the characteristics of the rubber material of the rubber tube, the radial deformation of the rubber tube can cause the nonlinear change of the radial rigidity of the rubber tube. Fig. 10 discloses a stiffness curve of the propeller shaft dynamic vibration absorber according to an embodiment of the present invention as the ring gear rotates. Wherein the abscissa is a rotational angle θ of the ring gear with respect to the outer cylinder, which can be obtained by the indication of the scale and the mark point. The ordinate is the radial stiffness K. The curve indicated by the broken line in the figure is a curve of the radial rigidity K of the rubber tube with the rotation angle θ. A schematic cross-sectional view of the propeller shaft dynamic vibration absorber is also shown in fig. 10 to demonstrate the meaning of K and θ.

The installation and use processes of the dynamic vibration absorber of the transmission shaft of the invention are briefly described as follows:

firstly, assembling the dynamic vibration absorber, vulcanizing the inner wall of the rubber tube 4 and the outer wall of the inner tube 3 together, vulcanizing the outer wall of the rubber tube 4 and tiles 21 of 8 pressing sheets 5 together, and then loading the pressing sheets 5 into the sliding groove 16 of the outer tube 2. And gear rings 7 are arranged at two ends of the outer cylinder 2, the graduated scale 22 faces outwards, and the gear rings 7 are connected with the pressing sheet 5 through connecting rods 6. Finally, the annular weight 8 is mounted on the outside of the outer cylinder 2 by screws 9.

The dynamic vibration absorber is arranged on the transmission shaft, the inner cylinder 3 is sleeved on the outer side of the transmission shaft, the clamping screw 11 is screwed, and the dynamic vibration absorber is fixed on the transmission shaft.

The adjusting screw 1 is rotated, so that the gear ring 7 rotates around the axis of the outer cylinder 2, and the gear ring 7 drives the pressing sheet 5 to compress the rubber cylinder 4 through the connecting rod 6. According to the scale 22 on the gear ring 7 and the mark point 14 on the outer cylinder 2, the rotation angle theta of the gear ring 7 can be read, and the rigidity of the dynamic vibration absorber can be converted according to the curve graph of the rotation angle and the rigidity.

The locking screw 10 is tightened to fix the ring gear 7 in the outer cylinder 2. In the use process, the rigidity and the mass of the dynamic vibration absorber can be adjusted according to requirements, so that the frequency of the dynamic vibration absorber is changed.

The dynamic vibration absorber of the transmission shaft of the invention adjusts the rigidity of the dynamic vibration absorber by applying radial precompression quantity to rubber and adjusts the mass of the dynamic vibration absorber by changing the quantity of the counterweight rings, thereby changing the frequency of the dynamic vibration absorber. The dynamic vibration absorber for the transmission shaft can effectively avoid the defects of the traditional scheme, is convenient to install and adjust, can be suitable for transmission shafts with different structures, and has wider application prospect in the field of vibration and noise reduction of automobiles.

It should also be noted that the above-mentioned embodiments are only specific embodiments of the present invention. It is apparent that the present invention is not limited to the above embodiments and similar changes or modifications can be easily made by those skilled in the art from the disclosure of the present invention and shall fall within the scope of the present invention. The embodiments described above are provided to enable persons skilled in the art to make or use the invention and that modifications or variations can be made to the embodiments described above by persons skilled in the art without departing from the inventive concept of the present invention, so that the scope of protection of the present invention is not limited by the embodiments described above but should be accorded the widest scope consistent with the innovative features set forth in the claims.