Dynamic vibration absorber for driving shaft

Abstract

The utility model discloses a driving shaft dynamic vibration absorber which comprises a dynamic vibration absorber body, a mass block and an installation cover, a driving shaft body is arranged in the dynamic vibration absorber body in a penetrating mode, a positioning column is integrally and fixedly installed on the outer side of the right end of the dynamic vibration absorber body, and a first fixing bolt is arranged in the positioning column in a penetrating mode; and the mass block is installed at the outer side end of the positioning column, an extension plate is integrally and fixedly installed on the outer surface of the mass block, and a second fixing bolt is arranged in the extension plate in a penetrating mode. The utility model belongs to the technical field of dynamic vibration absorbers, and aims at solving the problems that in the prior art, the adjustability of the vibration frequency is limited, adjustment is complex, and meanwhile the protection effect is poor. The technical effects are that the adjustability of the vibration frequency is improved, and the phenomenon that the extension plate and the second fixing bolt cannot be disassembled due to external corrosion can be effectively avoided.

Description

Technical Field

[0001] The present application relates to the technical field of dynamic vibration absorbers, and in particular to a dynamic vibration absorber for a drive shaft. Background Art

[0002] A dynamic vibration absorber is a device specifically designed to reduce drive shaft vibration. It improves the stability and efficiency of the mechanical system by absorbing and dissipating vibration energy. Currently, dynamic vibration absorbers are usually installed on the drive shaft and rotate with the shaft. When the shaft vibrates during operation, the vibration absorber absorbs the vibration energy through its internal vibration reduction mechanism, thereby reducing the vibration amplitude of the shaft.

[0003] In a dynamic vibration absorber, a crucial component is the mass block, whose main function is to significantly enhance the inertia of the system, thereby optimizing the vibration reduction effect. When in use, different natural frequencies can be obtained by changing the mass of the dynamic vibration absorber. However, the mass of most dynamic vibration absorbers is currently fixed, which limits the adjustability of their vibration frequency, resulting in cumbersome adjustment, poor protection effect, and certain defects. Utility Model Content

[0004] To this end, the present application provides a drive shaft dynamic vibration absorber to solve the existing problem of limited adjustability of its vibration frequency, resulting in cumbersome adjustment and poor protection effect.

[0005] In order to achieve the above objectives, this application provides the following technical solutions:

[0006] A drive shaft dynamic vibration absorber includes a dynamic vibration absorber body, a mass block, and a mounting cover. The drive shaft body is disposed through the interior of the dynamic vibration absorber body. A positioning column is integrally fixedly mounted on the outer side of the right end of the dynamic vibration absorber body. A first fixing bolt is disposed through the interior of the positioning column.

[0007] The mass block is mounted on the outer end of the positioning column, and an extension plate is integrally fixedly mounted on the outer surface of the mass block, and a second fixing bolt is provided through the interior of the extension plate;

[0008] The installation cover is installed at the outer end of the extension plate, and a rubber pad is pasted on the inside of the installation cover.

[0009] Furthermore, a fixing plate located outside the right end of the dynamic vibration absorber body is fixedly mounted on the outer end of the drive shaft body, and the right end of the first fixing bolt extends to the inside of the fixing plate.

[0010] Furthermore, groove structures that match the thickness of the mass block are formed at equal intervals inside the outer wall of the positioning column.

[0011] Furthermore, the longitudinal section of the mass block is semicircular, and the mass blocks are arranged horizontally at equal intervals on the outside of the positioning column.

[0012] Furthermore, positioning blocks are fixedly mounted on the outer sides of the dynamic vibration absorber body and the fixing plate at one end close to the positioning column, and the mounting cover and the positioning block are connected in a plug-in manner.

[0013] Furthermore, a groove structure adapted to the extension plate is provided inside the rubber pad.

[0014] Furthermore, the mounting cover is fixedly connected to the dynamic vibration absorber body and the fixing plate by screws respectively.

[0015] Compared with the prior art, this application has at least the following beneficial effects:

[0016] 1. Grooves that match the thickness of the mass blocks are evenly spaced on the outer wall of the positioning column, and the mass blocks are evenly spaced horizontally on the outside of the positioning column, making it easier to assemble multiple groups of mass blocks according to vibration reduction requirements and improving the adjustability of the vibration frequency.

[0017] 2. The rubber pad can be placed on the outer ends of the extension plate and the second fixing bolt as the installation cover moves, thereby isolating and protecting the extension plate and the second fixing bolt, and preventing the extension plate and the second fixing bolt from being unable to be removed due to external corrosion;

[0018] 3. An extension plate is integrally fixedly installed on the outer surface of the mass block. When the corresponding two sets of mass blocks are aligned, the second fixing bolt is rotated and inserted into the interior of the extension plate, thereby facilitating the fixing of the mass block to the outer end of the positioning column through the extension plate, thereby improving the installation effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] To more intuitively illustrate the prior art and the present application, exemplary drawings are provided below. It should be understood that the specific shapes and structures shown in the drawings should not generally be considered as limiting conditions for implementing the present application; for example, based on the technical concepts disclosed in this application and the exemplary drawings, those skilled in the art are capable of easily making routine adjustments or further optimizations to the addition / reduction / attribution division of certain units, the specific shapes, positional relationships, connection methods, and dimensional ratios.

[0020] Figure 1 A schematic front cross-sectional view of a drive shaft dynamic vibration absorber provided in one embodiment of the present application;

[0021] Figure 2 A schematic side cross-sectional structural diagram of a drive shaft dynamic vibration absorber provided in one embodiment of the present application;

[0022] Figure 3 A drive shaft dynamic vibration absorber provided in one embodiment of the present application Figure 1 Enlarged structural diagram at point A in the middle.

[0023] Description of reference numerals:

[0024] 1. Dynamic vibration absorber body; 2. Drive shaft body; 3. Fixing plate; 4. Positioning column; 5. First fixing bolt; 6. Mass block; 7. Extension plate; 8. Second fixing bolt; 9. Mounting cover; 10. Rubber pad; 11. Positioning block. DETAILED DESCRIPTION

[0025] The present application will be further described below in detail through specific embodiments in conjunction with the accompanying drawings.

[0026] like Figures 1 to 3 As shown, a drive shaft dynamic vibration absorber in the embodiment of the first aspect of the present application comprises: a dynamic vibration absorber body 1, a mass block 6 and a mounting cover 9, a drive shaft body 2 is provided inside the dynamic vibration absorber body 1, and a positioning column 4 is integrally fixedly installed on the outer side of the right end of the dynamic vibration absorber body 1, a first fixing bolt 5 is provided inside the positioning column 4, a fixing plate 3 located on the outer side of the right end of the dynamic vibration absorber body 1 is fixedly installed on the outer end of the drive shaft body 2, and the right end of the first fixing bolt 5 extends to the inside of the fixing plate 3, the dynamic vibration absorber body 1 is installed on the outer end of the drive shaft body 2 and is located on the outer side of the left end of the fixing plate 3. During installation, the right end of the positioning column 4 is tightly connected to the outer side of the left end of the fixing plate 3, and then the first fixing bolt 5 is rotated and inserted into the interior of the dynamic vibration absorber body 1, the positioning column 4 and the fixing plate 3 in sequence, so as to facilitate the fixed installation of the dynamic vibration absorber body 1 and the fixing plate 3 by the first fixing bolt 5;

[0027] The mass block 6 is mounted on the outer end of the positioning column 4. The longitudinal section of the mass block 6 is semicircular. The outer wall of the positioning column 4 is evenly spaced with groove structures that are adapted to the thickness of the mass block 6. The groove structure has a good limiting effect on the mass block 6, which is convenient for positioning the corresponding two groups of mass blocks 6, so as to achieve the purpose of convenient assembly. The outer surface of the mass block 6 is integrally fixedly installed with an extension plate 7. The interior of the extension plate 7 is penetrated by a second fixing bolt 8. After the two groups of mass blocks 6 are aligned, the second fixing bolt 8 is rotated and inserted into the interior of the extension plate 7, so as to facilitate the fixing of the mass block 6 to the outer end of the positioning column 4 through the extension plate 7, so as to facilitate the optimization of the overall vibration reduction effect through the mass block 6.

[0028] The mass blocks 6 are arranged horizontally and evenly spaced outside the positioning column 4, which facilitates the relatively convenient assembly of multiple groups of mass blocks 6 according to the requirements of vibration reduction and improves the adjustability of the vibration frequency.

[0029] The mounting cover 9 is mounted on the outer end of the extension plate 7, and a rubber pad 10 is pasted on the inside of the mounting cover 9. The inside of the rubber pad 10 is provided with a groove structure adapted to the extension plate 7. After the mass block 6 is fixed to the outer side of the right end of the dynamic vibration absorber body 1 through the extension plate 7 and the second fixing bolt 8, the mounting cover 9 is inserted into the gap at the connection between the dynamic vibration absorber body 1 and the fixing plate 3. At this time, the rubber pad 10 can be sleeved on the outer end of the extension plate 7 and the second fixing bolt 8 as the mounting cover 9 moves, thereby facilitating the isolation and protection of the extension plate 7 and the second fixing bolt 8, and preventing the extension plate 7 and the second fixing bolt 8 from being unable to be disassembled due to external corrosion.

[0030] The dynamic vibration absorber body 1 and the fixing plate 3 are fixedly installed with a positioning block 11 on the outer side of one end close to the positioning column 4, and the mounting cover 9 is connected to the positioning block 11 by plugging. The mounting cover 9 is fixedly connected to the dynamic vibration absorber body 1 and the fixing plate 3 by screws respectively. The positioning block 11 plays a good positioning role when the mounting cover 9 is installed to prevent it from shifting. After the installation is completed, the mounting cover 9 can be fixed with screws.

[0031] The technical features of the above embodiments can be combined arbitrarily (as long as there is no contradiction in the combination of these technical features). In order to make the description concise, not all possible combinations of the technical features in the above embodiments are described; these embodiments that are not explicitly written should also be considered to be within the scope of this specification.

Claims

1. A drive shaft dynamic vibration absorber, comprising a dynamic vibration absorber body (1), a mass block (6) and a mounting cover (9), characterized in that: A drive shaft body (2) is provided through the interior of the dynamic vibration absorber body (1), and a positioning column (4) is integrally fixedly installed on the outer side of the right end of the dynamic vibration absorber body (1), and a first fixing bolt (5) is provided through the interior of the positioning column (4); The mass block (6) is mounted on the outer end of the positioning column (4), and an extension plate (7) is integrally fixedly mounted on the outer surface of the mass block (6), and a second fixing bolt (8) is provided through the interior of the extension plate (7); The mounting cover (9) is mounted on the outer end of the extension plate (7), and a rubber pad (10) is adhered to the interior of the mounting cover (9).

2. The drive shaft dynamic vibration absorber according to claim 1, characterized in that: A fixing plate (3) located outside the right end of the dynamic vibration absorber body (1) is fixedly mounted on the outer end of the drive shaft body (2), and the right end of the first fixing bolt (5) extends to the inside of the fixing plate (3).

3. The drive shaft dynamic vibration absorber according to claim 1, characterized in that: Grooved structures matching the thickness of the mass block (6) are provided at equal intervals inside the outer wall of the positioning column (4).

4. The drive shaft dynamic vibration absorber according to claim 3, characterized in that: The longitudinal section of the mass block (6) is semicircular, and the mass block (6) is arranged horizontally and equidistantly on the outside of the positioning column (4).

5. The drive shaft dynamic vibration absorber according to claim 1, characterized in that: A positioning block (11) is fixedly mounted on the outer side of one end of the dynamic vibration absorber body (1) and the fixing plate (3) close to the positioning column (4), and the mounting cover (9) and the positioning block (11) are connected in a plug-in manner.

6. The drive shaft dynamic vibration absorber according to claim 1, characterized in that: The rubber pad (10) is provided with a groove-shaped structure inside that matches the extension plate (7).

7. The drive shaft dynamic vibration absorber according to claim 5, characterized in that: The mounting cover (9) is fixedly connected to the dynamic vibration absorber body (1) and the fixing plate (3) respectively via screws.

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