CN211838924U - A series structure of eccentric shaft of acoustic wave exciter - Google Patents

Abstract

The utility model relates to a construction machinery technical field specifically is a series connection structure of sound wave vibration exciter eccentric shaft. The utility model provides a series structure of the eccentric shaft of the sound wave vibration exciter, which comprises a vibration unit and a base, wherein the vibration unit comprises an eccentric shaft and a bearing; the vibration unit is arranged in the base mounting hole; the eccentric part of the eccentric shaft of the vibration unit is positioned at the axial middle part; the bearings are symmetrically arranged at the shaft diameters of two ends of the eccentric shaft; the vibration unit comprises an additional vibration unit and a basic vibration unit; the additional vibration unit is connected with the basic vibration unit in series. The utility model discloses can effectively reduce the load of single bearing, can prolong the life of bearing, improve the reliability of acoustic power head product.

Description

A series structure of eccentric shaft of acoustic wave exciter

technical field

The utility model relates to the technical field of construction machinery, in particular to a series structure of an eccentric shaft of an acoustic wave exciter.

Background technique

In the prior art, the sonic power head drilling rig utilizes the rotation of the drill bit and the high-frequency vibration of the axial direction to complete the drilling operation, which can liquefy the soil during drilling and reduce the disturbance to the surrounding geology. Since the vibration frequency of the sonic power head exciter is above 90 Hz, and sufficient excitation force is required during operation, the bearing of the eccentric shaft is easily damaged. Therefore, there is an urgent need for a structure that can improve the service life of the bearing.

Utility model content

The purpose of the utility model is to provide a series structure of the eccentric shaft of the acoustic wave exciter, which can prolong the service life of the bearing and improve the reliability of the acoustic wave power head product.

For achieving the above object, the utility model provides the following technical solutions:

A series structure of an eccentric shaft of a sound wave exciter includes a vibration unit and a machine base, the vibration unit includes an eccentric shaft and a bearing; the vibration unit is installed in the installation hole of the machine base; the eccentric shaft of the vibration unit is The eccentric part is located in the middle part of the axial direction; the bearings are installed symmetrically at the shaft diameters of both ends of the eccentric shaft of the vibration unit;

The vibration unit includes a basic vibration unit and an additional vibration unit; the basic vibration unit includes an end eccentric shaft and a bearing; the basic vibration unit is arranged at the end of the base; one end of the end eccentric shaft is The input end is in the form of a spline or a flat key for power input; the additional vibration unit includes an additional eccentric shaft and a bearing; the additional eccentric shaft is connected in series with the end eccentric shaft; The bearings are also connected in series with each other; the bearings are installed symmetrically at both ends of the eccentric shafts of the basic vibration unit and the additional vibration unit.

Preferably, the eccentric shafts of the additional vibration units are connected in series through a card slot; the additional vibration unit and the basic vibration unit are connected in series through a card slot.

Preferably, the end of the additional vibration unit with a convex groove is connected in series with the end of the additional vibration unit with a groove; the end of the additional vibration unit with a convex groove and the basic vibration unit with a concave end One end of the slot is connected.

Preferably, the mounting hole of the machine base is a cylindrical through hole; the external mounting position of the vibration unit is a cylindrical surface; the outer diameter of the cylindrical surface is matched with the diameter of the cylindrical through hole.

Preferably, the outer ring of the bearing of the vibration unit is provided with a ferrule.

Preferably, retaining rings are also provided on both sides of the outer ring of the bearing for positioning.

Preferably, the series structure of the eccentric shaft of the acoustic wave exciter further comprises a spacer and an end cover; the spacer is used to isolate the adjacent vibration units; A cover is connected to the base and positioned axially.

Compared with the prior art, the utility model has the following beneficial effects:

According to the support method of the present invention, the eccentric shafts after n vibration units are connected in series can obtain 2n supports. Compared with the same type of single eccentric shaft exciter, it has only 2 supports, which can effectively reduce the load of a single bearing. It can prolong the service life of the bearing and improve the reliability of the sonic power head product.

The outer ring of the bearing of the utility model is also installed with a ferrule, in this way, the installation diameter of the vibration unit can be increased, allowing the eccentric shaft to have a larger eccentricity, so as to obtain a larger exciting force.

Description of drawings

Fig. 1 is the axial sectional schematic diagram of the vibration exciter;

Fig. 2 is the radial sectional schematic diagram of the vibration exciter; Fig. 3 is the sectional schematic diagram of the basic vibration unit;

FIG. 4 is a schematic cross-sectional view of an additional vibration unit.

reference number

1. Vibration unit, 2. Machine base, 3. Spacer, 4. End cover, 11. End eccentric shaft, 12. Bearing, 13. Retaining ring, 14. Additional eccentric shaft, 111. Input end, 112. Concave Slot, 113. Convex groove.

Detailed ways

The technical solutions of the present invention will be described in further detail below in conjunction with the accompanying drawings.

In the present invention, the number of additional vibration units is not limited, and can be set as required.

A series structure of an eccentric shaft of a sound wave exciter, comprising a vibration unit 1 and a base 2, the vibration unit 1 includes an eccentric shaft and a bearing; the vibration unit 1 is installed in the installation hole of the base 2; the The eccentric part of the eccentric shaft of the vibration unit 1 is located in the middle part of the axial direction; the bearings are installed symmetrically at the axial diameters of both ends of the eccentric shaft of the vibration unit 1;

The vibration unit 1 includes a basic vibration unit and an additional vibration unit; the basic vibration unit includes an end eccentric shaft 11 and a bearing 12; the basic vibration unit is arranged at the end of the base 2; the end is eccentric One end of the shaft 11 is the input end 111, which is in the form of a spline or a flat key for power input; the additional vibration unit includes an additional eccentric shaft 14 and a bearing 12; the additional eccentric shaft 14 and the end eccentric shaft 11 are connected in series; the additional eccentric shafts 14 are also connected in series with each other; the bearings 12 are installed symmetrically at both ends of the eccentric shafts of the basic vibration unit and the additional vibration unit.

As an embodiment of the present invention, as shown in FIGS. 3 and 4 , the additional eccentric shafts 14 of the additional vibration unit are connected in series through a card slot; the additional vibration unit and the basic vibration unit are connected by a card slot. Slots are connected in series.

As an embodiment of the present invention, as shown in FIGS. 3 and 4 , the end of the additional vibration unit with the convex groove 113 is connected in series with the end of the additional vibration unit with the groove 112 ; The end of the vibration unit with the convex groove 113 is connected with the end of the basic vibration unit with the groove 112 .

As an embodiment of the present invention, as shown in FIG. 2 , the mounting hole of the base 2 is a cylindrical through hole; the external mounting position of the vibration unit is a cylindrical surface; the outer diameter of the cylindrical surface is connected to the cylindrical through hole. match the hole diameter.

As an embodiment of the present invention, as shown in FIG. 3 , the outer ring of the bearing of the vibration unit 1 is provided with a ferrule. In this way, the installation diameter of the vibration unit can be increased, allowing the eccentric shaft to have a larger amount of eccentricity. The two sides of the outer ring of the bearing are also provided with retaining rings 13 for positioning.

The utility model realizes the axial positioning of the vibration unit 1 by installing the end covers 4 at both ends of the machine base 2 together with the spacer 3, the two sides of the outer ring of the bearing 12 are positioned by the retaining rings 13, and the inner ring of the bearing 12 is on the adjacent sides of the two bearings. Use the shaft diameter of the eccentric shaft for positioning.

As an embodiment of the present invention, as shown in FIG. 1 , the series structure of the eccentric shaft of the acoustic wave exciter further includes a spacer 3 and an end cover 4; The sleeve 3 is used for isolation; the two ends of the vibration unit 1 are connected to the base 2 using the end caps 4 .

The utility model also provides a method for using the series structure of the eccentric shaft of the acoustic wave exciter:

When the eccentric shaft of the present invention is used in a sonic power head exciter, two identical basic vibration units and additional vibration units are required to be arranged in parallel on a frame, and by connecting the drive structures at the ends of the two basic vibration units, The desired acoustic vibration can be obtained by driving the two vibration shafts to rotate synchronously at high speed and at the same speed above 5400 rpm in opposite directions.

Claims (7)

1. A series structure of eccentric shafts of a sound wave vibration exciter comprises a vibration unit and a base, and is characterized in that the vibration unit comprises an eccentric shaft and a bearing; the vibration unit is arranged in the base mounting hole; the eccentric part of the eccentric shaft of the vibration unit is positioned at the axial middle part; the bearings are symmetrically arranged at the shaft diameters of two ends of the eccentric shaft of the vibration unit;

the vibration unit comprises a basic vibration unit and an additional vibration unit; the basic vibration unit comprises an end eccentric shaft and a bearing; the basic vibration unit is arranged at the end part of the base; one end of the end eccentric shaft is an input end, and the form of the input end is a spline or a flat key for inputting power; the additional vibration unit comprises an additional eccentric shaft and a bearing; the additional eccentric shaft is connected with the end eccentric shaft in series; the additional eccentric shafts are also mutually connected in series; the bearings are symmetrically arranged at the shaft diameters of the two ends of the eccentric shafts of the basic vibration unit and the additional vibration unit.

2. The series structure of the eccentric shafts of the acoustic vibration exciter according to claim 1, wherein the eccentric shafts of the additional vibration units are connected in series through clamping grooves; the additional vibration unit is connected with the basic vibration unit in series through a clamping groove.

3. The tandem structure of the eccentric shafts of the acoustic vibration exciter according to claim 2, wherein one end of the additional vibration unit having the convex groove is in tandem connection with one end of the additional vibration unit having the concave groove; one end of the additional vibration unit with the convex groove is connected with one end of the eccentric shaft of the basic vibration unit with the groove.

4. The series structure of the eccentric shafts of the acoustic vibration exciter according to claim 1, wherein the base mounting hole is a cylindrical through hole; the outer mounting position of the vibration unit is a cylindrical surface; the outer diameter of the cylindrical surface is matched with the diameter of the cylindrical through hole.

5. The series structure of the eccentric shafts of the acoustic vibration exciter according to claim 1, wherein a bearing outer ring of the vibration unit is provided with a ferrule.

6. The series structure of the eccentric shafts of the acoustic vibration exciter according to claim 5, wherein the outer ring of the bearing is further provided with retaining rings at both sides for axial positioning between the vibration units.

7. The series structure of the eccentric shafts of the acoustic vibration exciter according to any one of claims 1 to 6, further comprising a spacer and an end cap; the adjacent vibration units are isolated by the spacer bushes; and the two ends of the vibration unit are connected with the base by using the end covers and are axially positioned.

Images