CN203516570U - Dynamic absorber and auxiliary frame structure - Google Patents

Abstract

The utility model provides a dynamic absorber and an auxiliary frame structure. The dynamic absorber comprises a left support, a right support, an absorber support, a mass block and a fastening device, wherein the absorber support comprises a horizontal plate, a left vertical plate and a right vertical plate; the left vertical plate and the right vertical plate are connected to the two ends of the horizontal plate respectively; a left vertical hole is formed in the left support; a right vertical hole is formed in the right support; a first rubber tube is arranged in the left vertical hole; a second rubber tube is arranged in the right vertical tube; the left vertical plate is inserted into the first rubber tube; the right vertical plate is inserted into the second rubber tube. According to the dynamic absorber, under the situation of keeping the mass block, the left support, the right support and the absorber support changeless, the damping ratio of the dynamic absorber is flexibly adjusted by replacing the first rubber tube and the second rubber tube made of different rubber materials, the damping characteristic of the dynamic absorber can be rapidly changed in a test, and the working requirements of measuring adjustment and design setting are met.

Description

Dynamic shock absorber and sub-frame structure

technical field

The utility model belongs to the technical field of dynamic shock absorbers, in particular to a dynamic shock absorber and a sub-frame structure.

Background technique

A dynamic vibration absorber is a device that uses a resonance system to absorb the vibration energy of an object to reduce the vibration of the object. It is usually used to solve the resonance of the local structure of the car, such as the steering wheel, suspension, sub-frame, drive shaft, transmission shaft and exhaust. Tubes and other automotive partial structures.

The basic technical issues closely related to the dynamic vibration absorber are mainly the determination of the three technical parameters of mass, frequency and damping ratio, among which the damping ratio of the dynamic vibration absorber is the most important technical parameter. Before product certification, this technical parameter needs to be determined by calculation and experiment to determine the design scheme.

In the traditional dynamic vibration absorber, the outer bracket of the dynamic vibration absorber and the mass block in the middle are vulcanized rubber materials. The advantages of this dynamic vibration absorber are simple structure, extremely convenient installation and disassembly, and are more effective in solving resonance problems. good. After the rubber inside the shock absorber is vulcanized, its damping ratio is cured accordingly. However, it is generally difficult to guarantee the best vibration and noise reduction effect in one test, and it is often necessary to adjust the parameters repeatedly to meet the design requirements. The disadvantage of the existing solution is that it is difficult to change the damping characteristics of the above-mentioned rubber quickly, so as to flexibly adapt to the requirements of the product development cycle of the dynamic vibration absorber.

Utility model content

The technical problem to be solved by the utility model is to provide a dynamic vibration absorber for the defect that the damping characteristics of the existing dynamic vibration absorber are difficult to change quickly during the test.

The technical solution adopted by the utility model to solve the problems of the technologies described above is as follows:

A dynamic shock absorber is provided, comprising a left bracket, a right bracket, a shock absorber bracket, a mass block and a fastening device for detachably connecting the mass block to the shock absorber bracket, and the shock absorber bracket It includes a horizontal plate and a left vertical plate and a right vertical plate respectively connected to both ends of the horizontal plate, a left vertical hole is formed on the left bracket, a right vertical hole is formed on the right bracket, and the left vertical hole is formed on the right bracket. A first rubber tube is set in the vertical hole, a second rubber tube is set in the right vertical hole, the left vertical plate is inserted into the first rubber tube, and the right vertical plate is inserted into the second rubber tube. Two rubber tubes.

Further, the horizontal plate is provided with at least one first threaded hole, the mass block is provided with a second threaded hole directly below the threaded hole, and the fastening device includes screwing into the first threaded hole and a stud or bolt in the second threaded hole.

Further, the horizontal plate is provided with at least one first threaded hole, and the mass block is provided with a second threaded hole directly below the first threaded hole, and the fastening device includes screwing into the first threaded hole. Studs in the threaded hole and the second threaded hole, and nuts screwed into the studs and pressed against the horizontal plate.

Further, the left vertical plate has an interference fit with the first rubber tube, the right vertical plate has an interference fit with the second rubber tube, and the first rubber tube has an interference fit with the left vertical hole. interference fit, the second rubber tube is interference fit with the right vertical hole.

Further, the left bracket is provided with a left threaded hole, and the right bracket is provided with a right threaded hole.

According to the dynamic vibration absorber of the utility model, under the condition that the mass block, the left bracket, the right bracket and the shock absorber bracket remain unchanged, the power can be realized by replacing the first rubber tube and the second rubber tube of different rubber materials. The flexible adjustment of the damping ratio of the vibration absorber can quickly change the damping characteristics of the dynamic vibration absorber during the test, meeting the needs of measurement, adjustment and design finalization.

In addition, the utility model also provides a sub-frame structure, including a sub-frame, and the above-mentioned dynamic vibration absorber is arranged on the sub-frame.

Further, the left bracket is provided with a left threaded hole, the right bracket is provided with a right threaded hole, and the sub-frame is provided with a first stud threaded with the left threaded hole and connected with the Second stud for threaded connection in right threaded hole.

Description of drawings

Fig. 1 is a schematic diagram of a dynamic vibration absorber provided by an embodiment of the present invention;

Fig. 2 is a schematic diagram of a dynamic vibration absorber provided by another embodiment of the present invention.

The reference signs in the accompanying drawings of the description are as follows:

1. Left bracket; 11. Left vertical hole; 12. Left threaded hole; 2. Right bracket; 21. Right vertical hole; 22. Right threaded hole; 3. Shock absorber bracket; 31. Horizontal plate; 311. 32, left vertical plate; 33, right vertical plate; 4, mass block; 41, second threaded hole; 5, fastening device; 51, stud; 6, first rubber tube; 7 , the second rubber tube; 50, a fastening device; 501, a stud; 502, a nut.

Detailed ways

In order to make the technical problems, technical solutions and beneficial effects solved by the utility model clearer, the utility model will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model, and are not intended to limit the utility model.

Please refer to Fig. 1, the dynamic vibration absorber that one embodiment of the present utility model provides, comprises left support 1, right support 2, shock absorber support 3, mass block 4 and is used to realize described mass block and described shock absorber support A detachably connected fastening device 5, the shock absorber bracket 3 includes a horizontal plate 31 and a left vertical plate 32 and a right vertical plate 33 respectively connected to the two ends of the horizontal plate 31, the left bracket 1 is formed There is a left vertical hole 11, a right vertical hole 21 is formed on the right bracket 2, a first rubber tube 6 is arranged in the left vertical hole 11, and a second rubber tube 6 is arranged in the right vertical hole 21. tube 7 , the left vertical plate 32 is inserted into the first rubber tube 6 , and the right vertical plate 33 is inserted into the second rubber tube 7 . The mass block 4 is detachably connected to the shock absorber bracket 3, so that mass blocks of different masses can be replaced quickly according to design requirements during the test.

The horizontal plate 31 is provided with at least one first threaded hole 311, the mass block 4 is provided with a second threaded hole 41 directly below the first threaded hole 311, and the fastening device 5 includes a The studs or bolts in the first threaded hole 311 and the second threaded hole 41 are described above. In this embodiment, as shown in FIG. 1 , the horizontal plate 31 is provided with two first threaded holes 311 , and two second threaded holes 311 are provided on the mass block 4 directly below the first threaded holes 311 . The threaded hole 41 , the fastening device 5 includes two studs 51 screwed into the first threaded hole 311 and the second threaded hole 41 .

In this embodiment, the left vertical plate 32 has an interference fit with the first rubber tube 6, the right vertical plate 33 has an interference fit with the second rubber tube 7, and the first rubber tube 6 It is interference fit with the left vertical hole 11 , and the second rubber tube 7 is interference fit with the right vertical hole 21 . This ensures that the dynamic shock absorber is firmly installed and meets the reliability of the test vehicle under harsh working conditions such as rapid acceleration on the road.

In this embodiment, the left bracket 1 is provided with a left threaded hole 12 , and the right bracket 2 is provided with a right threaded hole 22 . The left threaded hole 12 and the right threaded hole 22 are used for the connection between the dynamic shock absorber and the partial structure of the vehicle body.

According to the dynamic vibration absorber of the above-mentioned embodiment of the utility model, under the condition that the mass block, the left bracket, the right bracket and the shock absorber bracket are kept unchanged, by replacing the first rubber tube and the second rubber tube of different rubber materials, that is The flexible adjustment of the damping ratio of the dynamic vibration absorber can be realized, and the damping characteristics of the dynamic vibration absorber can be quickly changed during the test to meet the work needs of measurement, adjustment and design finalization.

Before the test, the first rubber tube and the second rubber tube of different rubber materials (with different damping ratios) can be prefabricated. The damping ratio of some rubber materials is shown in Table 1:

Table 1

rubber material Damping ratio (%) SBR 6.2 Mixture of natural rubber and styrene-butadiene rubber 14.1 Isopropyl 8.7 Mixture of natural gum and isoprene gum 11.2

In addition, as shown in Figure 2, the dynamic vibration absorber provided for another embodiment of the present utility model is different from the embodiment shown in Figure 1 in that in this embodiment, the fastening device 50 includes screwing into the The studs 501 in the first threaded hole 12 and the second threaded hole 22 and the nuts 502 screwed into the studs 501 and pressed against the horizontal plate 31 .

Compared with the embodiment shown in FIG. 1 , in this embodiment, a nut is added to limit the axial displacement of the stud, so that the connection between the mass block and the shock absorber bracket is more secure.

In addition, the utility model also provides a sub-frame structure, including a sub-frame, and the above-mentioned dynamic vibration absorber is arranged on the sub-frame.

In this embodiment, the left bracket is provided with a left threaded hole, the right bracket is provided with a right threaded hole, and the sub-frame is provided with a first stud screwed with the left threaded hole and connected with the left threaded hole. The second stud is threaded into the right threaded hole.

The above descriptions are only preferred embodiments of the present utility model, and are not intended to limit the present utility model. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present utility model shall be included in this utility model. within the scope of protection of utility models.

Claims (7)

1. A dynamic shock absorber, characterized in that it comprises a left support, a right support, a shock absorber support, a mass block and a fastening device for realizing the detachable connection between the mass block and the shock absorber support, the The shock absorber support includes a horizontal plate and a left vertical plate and a right vertical plate respectively connected to two ends of the horizontal plate, a left vertical hole is formed on the left support, and a right vertical hole is formed on the right support. hole, the left vertical hole is provided with a first rubber tube, the right vertical hole is provided with a second rubber tube, the left vertical plate is inserted into the first rubber tube, and the right vertical The plate is inserted into the second rubber tube. 2. The dynamic vibration absorber according to claim 1, wherein the horizontal plate is provided with at least one first threaded hole, and the mass block is provided with a second threaded hole just below the first threaded hole holes, and the fastening device includes studs or bolts screwed into the first threaded hole and the second threaded hole. 3. The dynamic vibration absorber according to claim 1, wherein the horizontal plate is provided with at least one first threaded hole, and the mass block is provided with a second threaded hole directly below the threaded hole, The fastening device includes studs screwed into the first threaded hole and the second threaded hole, and nuts screwed into the studs and pressed against the horizontal plate. 4. The dynamic shock absorber according to claim 1, characterized in that, the left vertical plate has an interference fit with the first rubber tube, and the right vertical plate has an interference fit with the second rubber tube , the first rubber tube is interference fit with the left vertical hole, and the second rubber tube is interference fit with the right vertical hole. 5. The dynamic vibration absorber according to any one of claims 1 to 4, characterized in that, the left bracket is provided with a left threaded hole, and the right bracket is provided with a right threaded hole. 6. A subframe structure, comprising a subframe, characterized in that the dynamic vibration absorber according to any one of claims 1 to 4 is arranged on the subframe. 7. The subframe structure according to claim 6, wherein the left bracket is provided with a left threaded hole, the right bracket is provided with a right threaded hole, and the subframe is provided with a The first stud that is threaded to the left threaded hole and the second stud that is threaded to the right threaded hole.

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