Novel automobile tail door dynamic vibration absorber

Abstract

The utility model relates to the technical field of vibration absorbers, and discloses a novel automobile tail door dynamic vibration absorber which comprises two cantilever beams and a bottom frame, the two cantilever beams are installed on the bottom frame through bolts, and mass unit box bodies are installed on the two cantilever beams. A movable mass block is arranged in the mass unit box body, and a mass adjusting structure for adjusting the weight of the movable mass block is mounted on the movable mass block; the mass unit box body is provided with a mass unit driver, the mass unit driver is used for driving the moving mass block to move, the overall weight of the moving mass block can be increased or decreased through the mass adjusting structure, the situation that the whole moving mass block is dismantled when adjustment is needed is avoided, and the convenience of adjustment is improved; the top limiting piece is in threaded connection with the opening in the upper end of the through groove, the mass adjusting columns can be rapidly disassembled and assembled, the number of the mass adjusting columns can be flexibly adjusted, and then the overall weight of the moving mass block is changed.

Description

Technical Field

[0001] The utility model relates to the technical field of vibration absorbers, in particular to a novel power vibration absorber for a car tailgate. Background Art

[0002] When a car encounters a bump or drives on a bumpy road, the excitation force generated by the road surface is transmitted to the car body through the tires and suspension system, which will excite the body and tailgate panel to vibrate and produce a roaring sound. This roaring sound has an adverse effect on the driving experience of the car. In order to eliminate this roaring sound, a dynamic vibration absorber is needed to reduce the vibration caused by road excitation.

[0003] A dynamic vibration absorber is a vibration reduction device that connects auxiliary mass to a vibration system through elastic elements. It can generally be simplified into a single-degree-of-freedom vibration system consisting of mass, spring, and damping elements. When working, the dynamic vibration absorber changes the vibration state of the main system by adjusting its own structural form, dynamic parameters, and coupling relationship with the main system to achieve the purpose of reducing the forced vibration response of the main vibration system in the expected frequency band. Through the dynamic action of the auxiliary mass, the force generated by the elastic element of the vibration absorber on the main system can offset part or most of the external exciting force acting on the main system to weaken the vibration of the main system. This is equivalent to transferring the vibration energy of the main system to the dynamic vibration absorber.

[0004] In the prior art, there is a wideband dual-frequency semi-active dynamic vibration absorber with the authorization announcement number CN220551427U, which includes two mass units, a cantilever beam, and a mounting base. The cantilever beam is fixedly connected to the mounting base, and the two ends of the cantilever beam are respectively connected to the mass units, and the two mass units use different adjustable mass blocks to form two single-degree-of-freedom systems with different resonant frequencies, thereby realizing the control of the dual-frequency vibration of the mechanical equipment. The utility model can realize the effective control of the dual-frequency vibration; the semi-active dynamic vibration absorber of the utility model has a wider operating frequency, and when the two controlled characteristic frequencies of the mechanical equipment change, it can realize the simultaneous tracking control of the two vibration frequencies.

[0005] In the above technical solution, the vibration frequency is changed by driving the positions of two movable mass blocks. To adapt to vibrations of different frequencies, mass blocks of different masses need to be used. In the above equipment, the weight of the mass blocks needs to be disassembled as a whole to adjust them, which is not conducive to the operation of the staff. For this reason, we propose a new type of automobile tailgate dynamic vibration absorber. Utility Model Content

[0006] The utility model provides a novel automobile tailgate power vibration absorber, which solves the technical problem that the vibration frequency is changed by driving the positions of two movable mass blocks, and mass blocks of different masses are required to adapt to vibrations of different frequencies. In the above device, the weight of the mass block needs to be disassembled as a whole to adjust it, which is not conducive to the operation of the staff.

[0007] In order to solve the above technical problems, the utility model provides a novel automobile tailgate dynamic vibration absorber, comprising two cantilever beams and a base frame, the two cantilever beams are mounted on the base frame by bolts, the two cantilever beams are mounted with a mass unit box, a mobile mass block is arranged inside the mass unit box, and a mass adjustment structure for adjusting the weight of the mobile mass block is mounted on the mobile mass block;

[0008] A mass unit driver is installed on the mass unit box, and the mass unit driver is used to drive the mobile mass block to move.

[0009] As a further technical solution of the utility model, the mass adjustment structure includes a plurality of through slots, and the plurality of through slots are all formed on the upper surface of the movable mass block, and the mass adjustment columns are movably connected inside the through slots.

[0010] As a further technical solution of the utility model, a top limiter is fixedly installed on the upper end of the mass adjustment column, the outer wall of the top limiter is threadedly connected to the upper end opening of the through slot, and the upper end of the top limiter extends to the outside of the through slot.

[0011] As a further technical solution of the utility model, the mass adjustment structure also includes several groups of inner grooves arranged in horizontal rows, each group of the inner grooves is arranged inside the moving mass block, the bottom of each group of the inner grooves is connected through a connecting groove, and a fluid that increases the mass is added inside each group of the inner grooves.

[0012] As a further technical solution of the utility model, the top of each group of the inner grooves is provided with an opening, the opening is provided on the upper surface of the moving mass block, and a sealing member is threadedly connected inside the opening.

[0013] As a further technical solution of the utility model, the mass unit driver includes a driving screw and a screw nut, both ends of the driving screw are rotatably installed inside the mass unit case through bearings, the screw nut is threadedly sleeved on the outer wall of the driving screw, and the screw nut is fixed to the moving mass block through a screw, one end of the driving screw is fixedly connected to a coupling, the end of the coupling is movably extended to the outside of the mass unit case, a servo motor is fixedly installed outside the mass unit case, and the output end of the servo motor is fixedly connected to the coupling.

[0014] As a further technical solution of the utility model, the top of the mass unit box is arranged as a detachable box cover structure, and the detachable box cover structure is fixed to the top of the mass unit box by bolts.

[0015] Compared with the related art, the novel automobile tailgate power vibration absorber provided by the utility model has the following beneficial effects:

[0016] 1. When the utility model is in use, the overall weight of the mobile mass block can be increased or decreased through the mass adjustment structure, avoiding the situation where the entire mass block needs to be dismantled when adjustment is required, thereby improving the convenience of adjustment.

[0017] When the utility model is in use, the top limit piece is threadedly connected to the upper end opening of the through slot, so that the mass adjustment column can be quickly disassembled and assembled, and the number of mass adjustment columns can be flexibly adjusted, thereby changing the overall weight of the mobile mass block. When the servo motor drives the driving screw to rotate through the coupling, the mobile mass block can be driven to move forward and backward along the mass unit box, changing the distance from the fixed end of the cantilever beam to the mobile mass block, thereby changing the resonant frequency of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of a new type of automobile tailgate power vibration absorber;

[0019] Figure 2 It is a schematic diagram of the overall top view of a new type of automobile tailgate power vibration absorber;

[0020] Figure 3 for Figure 2 Schematic diagram of the structure of the cross section at AA;

[0021] Figure 4 It is a schematic diagram of the structure of a moving mass block of a novel automobile tailgate power vibration absorber from a top view;

[0022] Figure 5 A new type of car tailgate power vibration absorber Figure 4 Structural schematic diagram of the cross section at BB;

[0023] Figure 6 It is a structural schematic diagram of a second embodiment of a mobile mass block of a novel automobile tailgate power vibration absorber;

[0024] Figure 7 A new type of car tailgate power vibration absorber Figure 6 Schematic diagram of the structure of the cross section at CC.

[0025] Numbers in the figure: 1. Cantilever beam; 2. Mass unit box; 21. Box cover structure; 22. Bolt; 3. Mass unit driver; 31. Screw nut; 32. Driving screw; 33. Coupling; 34. Servo motor; 4. Moving mass block; 5. Mass adjustment structure; 51. Through groove; 52. Mass adjustment column; 53. Top limiter; 54. Inner groove; 55. Connecting groove; 56. Opening; 57. Seal. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0027] Embodiment 1, by Figure 1-5 The utility model provides a novel automobile tailgate dynamic vibration absorber, comprising two cantilever beams 1 and a base frame, the two cantilever beams 1 are both mounted on the base frame by bolts, the base frame fixes the device to the automobile tailgate steel frame by bolts, when the servo motor 34 drives the driving screw 32 to rotate, the movable mass block 4 can be driven to move forward and backward along the mass unit box 2, and the distance from the fixed end of the cantilever beam 1 to the movable mass block 4 is changed, thereby changing the resonance frequency, the two cantilever beams 1 are both mounted with a mass unit box 2, the movable mass block 4 is arranged inside the mass unit box 2, and the movable mass block 4 is mounted with a mass adjustment structure 5 for adjusting the weight of the movable mass block 4;

[0028] A mass unit driver 3 is installed on the mass unit box 2, and the mass unit driver 3 is used to drive the mobile mass block 4 to move. When in use, the overall weight of the mobile mass block 4 can be increased or decreased through the mass adjustment structure 5, avoiding the situation where the entire mass block 4 needs to be dismantled when adjustment is required, thereby improving the convenience of adjustment.

[0029] In this embodiment, the mass adjustment structure 5 includes a plurality of through grooves 51, and the plurality of through grooves 51 are all opened on the upper surface of the movable mass block 4. A mass adjustment column 52 is movably connected inside the through grooves 51, and a top limiter 53 is fixedly installed on the upper end of the mass adjustment column 52. The outer wall of the top limiter 53 is threadedly connected to the upper end opening of the through groove 51, and the upper end of the top limiter 53 extends to the outside of the through groove 51. When in use, the mass adjustment column 52 can be quickly disassembled and assembled through the threaded connection between the top limiter 53 and the upper end opening of the through groove 51, and the number of mass adjustment columns 52 can be flexibly adjusted, thereby changing the overall weight of the movable mass block 4.

[0030] In this embodiment, the mass unit driver 3 includes a driving screw 32 and a screw nut 31. Both ends of the driving screw 32 are rotatably installed inside the mass unit box 2 through bearings. The screw nut 31 is threadedly sleeved on the outer wall of the driving screw 32. The screw nut 31 is fixed to the moving mass block 4 through a screw. One end of the driving screw 32 is fixedly connected to a coupling 33. The end of the coupling 33 is movably extended to the outside of the mass unit box 2. A servo motor 34 is fixedly installed outside the mass unit box 2. The output end of the servo motor 34 is fixedly connected to the coupling 33. When the servo motor 34 drives the driving screw 32 to rotate, it can drive the moving mass block 4 to move forward and backward along the mass unit box 2, changing the distance from the fixed end of the cantilever beam 1 to the moving mass block 4, thereby changing the resonant frequency of the system.

[0031] In this embodiment, the top of the mass unit box 2 is configured as a detachable box cover structure 21, and the detachable box cover structure 21 is fixed to the top of the mass unit box 2 by bolts 22. By providing the detachable box cover structure 21, it is convenient to open the box cover structure 21 during assembly and adjustment, which is convenient for the staff to adjust and assemble.

[0032] Example 2

[0033] See also Figure 6-7 In this embodiment, the mass adjustment structure 5 also includes a plurality of groups of inner grooves 54 arranged in a horizontal row, each group of inner grooves 54 is arranged inside the moving mass block 4, the bottom of each group of inner grooves 54 is connected through a connecting groove 55, a fluid for increasing mass is added inside each group of inner grooves 54, an opening 56 is provided at the top of each group of inner grooves 54, the opening 56 is arranged on the upper surface of the moving mass block 4, a sealing member 57 is threadedly connected inside the opening 56, and the sealing member 57 can seal the opening portion. In use, the fluid for increasing mass can be added to the inner grooves 54 and the connecting grooves 55 through the openings 56, thereby adjusting the mass of the moving mass block 4.

[0034] The working principle of this utility model:

[0035] When in use, the overall weight of the movable mass block 4 can be increased or decreased through the mass adjustment structure 5, avoiding the situation where the entire mass block 4 needs to be dismantled when adjustment is required, thereby improving the convenience of adjustment.

[0036] When in use, the top stopper 53 is threadedly connected to the upper opening of the through slot 51 , so that the mass adjustment column 52 can be quickly disassembled and assembled, and the number of the mass adjustment columns 52 can be flexibly adjusted, thereby changing the overall weight of the mobile mass block 4 .

[0037] When the servo motor 34 drives the driving screw 32 to rotate through the coupling 33, the movable mass block 4 can be driven to move forward and backward along the mass unit box 2, changing the distance from the fixed end of the cantilever beam 1 to the movable mass block 4, thereby changing the resonant frequency of the system.

[0038] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A novel automobile tailgate dynamic vibration absorber, comprising two cantilever beams (1) and a base frame, wherein the two cantilever beams (1) are mounted on the base frame by bolts, and characterized in that: A mass unit box (2) is installed on each of the two cantilever beams (1), a movable mass block (4) is arranged inside the mass unit box (2), and a mass adjustment structure (5) for adjusting the weight of the movable mass block (4) is installed on the movable mass block (4); A mass unit driver (3) is installed on the mass unit box (2), and the mass unit driver (3) is used to drive the moving mass block (4) to move.

2. The novel automobile tailgate dynamic vibration absorber according to claim 1 is characterized in that: The mass adjustment structure (5) comprises a plurality of through slots (51), wherein the plurality of through slots (51) are all formed on the upper surface of the movable mass block (4), and the mass adjustment columns (52) are movably connected inside the through slots (51).

3. The novel automobile tailgate dynamic vibration absorber according to claim 2 is characterized in that: A top stopper (53) is fixedly mounted on the upper end of the mass adjustment column (52); an outer wall of the top stopper (53) is threadedly connected to an upper opening of the through slot (51); and an upper end of the top stopper (53) extends to the outside of the through slot (51).

4. The novel automobile tailgate dynamic vibration absorber according to claim 3 is characterized in that: The mass adjustment structure (5) further comprises a plurality of groups of inner grooves (54) arranged in a horizontal row, each group of the inner grooves (54) being arranged inside the movable mass block (4), the bottoms of each group of the inner grooves (54) being connected via a connecting groove (55), and a fluid for increasing mass being added inside each group of the inner grooves (54).

5. The novel automobile tailgate dynamic vibration absorber according to claim 4 is characterized in that: The top of each group of inner grooves (54) is provided with an opening (56), the opening (56) is arranged on the upper surface of the moving mass block (4), and a sealing member (57) is threadedly connected inside the opening (56).

6. The novel automobile tailgate dynamic vibration absorber according to claim 1 is characterized in that: The mass unit driver (3) comprises a driving screw (32) and a screw nut (31), both ends of the driving screw (32) are rotatably mounted inside the mass unit housing (2) via bearings, the screw nut (31) is threadedly sleeved on the outer wall of the driving screw (32), the screw nut (31) is fixed to the movable mass block (4) via a screw, one end of the driving screw (32) is fixedly connected to a coupling (33), the end of the coupling (33) movably extends to the outside of the mass unit housing (2), a servo motor (34) is fixedly mounted outside the mass unit housing (2), and the output end of the servo motor (34) is fixedly connected to the coupling (33).

7. The novel automobile tailgate dynamic vibration absorber according to claim 6 is characterized in that: The top of the mass unit box (2) is provided with a detachable box cover structure (21), and the detachable box cover structure (21) is fixed to the top of the mass unit box (2) by bolts (22).

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