CN111250378A

CN111250378A - Vibration excitation device

Info

Publication number: CN111250378A
Application number: CN201910735180.0A
Authority: CN
Inventors: 王阳; 刘秀娟; 赵志明
Original assignee: Jinan Haote Innovative Management Consulting Partnership LP
Current assignee: Jinan Haote Innovative Management Consulting Partnership LP
Priority date: 2019-08-09
Filing date: 2019-08-09
Publication date: 2020-06-09

Abstract

An excitation device belongs to the technical field of vibration machinery and comprises an eccentric vibrator, an excitation motor (8) and a servo linear motion system (9); the eccentric oscillator at least comprises a first eccentric body (1), a second eccentric body (2) and a connecting shaft (5), wherein the first eccentric body (1) and at least one of the second eccentric body (2) are connected with the connecting shaft (5) through spiral grooves and boss structures matched with the spiral grooves, and a servo linear motion system (9) is connected with the connecting shaft (5). The servo linear motion system (9) pushes the connecting shaft (5) to move linearly to drive the second eccentric body (2) to rotate circumferentially, the position of the first eccentric body (1) is fixed, the relative position of the first eccentric body (1) and the second eccentric body (2) in the circumferential direction is adjusted, and the purpose of controlling the size of the exciting force in real time in the working process of equipment is achieved.

Description

Vibration excitation device

Technical Field

The invention belongs to the technical field of vibrating machinery, and particularly relates to an excitation device arranged on vibrating mechanical equipment.

Background

The vibration exciting device is a device which is arranged on vibration mechanical equipment and is used for generating exciting force, is a main component part of the vibration machinery and plays a decisive role in the mechanical vibration mode. The vibrating machine with the vibration excitation device is widely applied to industries such as metallurgical mines, industrial production, engineering construction, experimental equipment and the like, and is used for realizing screening, conveying, tamping, vibration aging, forming and the like of objects. The existing mechanical vibration excitation device mainly comprises a motor and an eccentric vibrator, wherein the motor drives the eccentric vibrator to move to generate mechanical vibration. This type of excitation device can control the vibration frequency only by controlling the rotation speed of the excitation motor, and is not easy to perform amplitude control (excitation force control). The excitation motor needs to be stopped to manually adjust the eccentricity of the excitation device to control the excitation force. The actual operation process is very troublesome for different vibration parameters, and the optimal vibration parameters are approached by continuously stopping, adjusting eccentricity, adjusting frequency and starting. The step of adjusting the eccentricity alone comprises the steps of loosening the eccentric set screw, adjusting the eccentricity, fastening the eccentric set screw and the like. In addition, the adjustment precision is poor, the eccentric amount adjusted in the static state is difficult to achieve the optimal excitation force parameter in the working process, and the excitation force can only be close or almost close, so that the excitation force cannot be dynamically adjusted in the working process. A further disadvantage of conventional excitation devices is that they must be set to a large eccentricity when stopped when a large excitation force is required on the workpiece. The excitation motor is started under larger eccentricity, and the current of the excitation motor is increased due to large starting load, so that electric elements are easily burnt or the motor is easily damaged.

Disclosure of Invention

Aiming at the defects of the prior art, the invention provides the excitation device which can control the magnitude of the excitation force in real time in the working process of equipment.

The excitation device comprises an eccentric vibrator, an excitation motor (8) for driving the eccentric vibrator to rotate, and a servo linear motion system (9) for adjusting the eccentric amount of the eccentric vibrator; the eccentric oscillator at least comprises a first eccentric body (1), a second eccentric body (2) and a connecting shaft (5), wherein the first eccentric body (1) and at least one of the second eccentric body (2) are connected with the connecting shaft (5) through spiral grooves and boss structures matched with the spiral grooves, and a servo linear motion system (9) is connected with the connecting shaft (5).

The first structure of the eccentric vibrator is as follows: the first eccentric body (1) and the second eccentric body (2) are arranged in parallel in the left-right direction, the first eccentric body (1) is a left eccentric body, the second eccentric body (2) is a right eccentric body, and the gravity centers of the second eccentric body (2) and the first eccentric body (1) deviate from the rotation center formed by the connecting shaft (5); the first eccentric body (1) is fixedly connected with an output shaft of the excitation motor (8), and the servo linear motion system (9) is fixedly connected with the connecting shaft (5) in the axial direction and rotatably connected with the connecting shaft in the surface circumferential direction.

The first eccentric body (1) is connected with the connecting shaft (5) through a linear groove and a boss structure matched with the linear groove; the second eccentric body (2) is connected with the connecting shaft (5) through a spiral groove and a boss structure matched with the spiral groove.

The further scheme is as follows: the first eccentric body (1) is provided with a left pillow block (10), and the left pillow block (10) is provided with a first shaft hole (11).

Furthermore, the output shaft of the excitation motor (8) is fixed on the left part of the first shaft hole (11) in a matched mode through a key slot.

Furthermore, a straight groove is formed in the right side of the first shaft hole (11), and a first boss matched with the straight groove is arranged on the left side of the connecting shaft (5); a second shaft hole (21) is formed in the second eccentric body (2), a spiral groove is formed in the second shaft hole (2), and a second boss matched with the spiral groove is arranged on the right side of the connecting shaft (5).

Preferably, at least two first bosses are arranged on a track line matched with the linear groove; and at least two second bosses are arranged on a track line matched with the spiral groove.

Or a linear groove is formed in the left side of the connecting shaft (5), and a third boss matched with the linear groove is arranged in the first shaft hole (11); the right side of the connecting shaft (5) is provided with a spiral groove, and a fourth boss matched with the spiral groove is arranged in the second shaft hole (2).

Preferably, at least two third bosses are arranged on a track line matched with the linear groove; and at least two fourth bosses are arranged on the track line matched with the spiral groove.

The working principle of the excitation device is as follows:

the output shaft of the excitation motor (8) drives the first eccentric body (1) to synchronously rotate around the rotation center, the first eccentric body (1) drives the connecting shaft (5) to synchronously rotate, the connecting shaft (5) drives the second eccentric body (2) to synchronously rotate, the synchronous rotation of the first eccentric body (1) and the second eccentric body (2) is realized, and stable excitation force is output. When the eccentric amount of the eccentric vibrator needs to be adjusted, the servo linear motion system (9) is started to act, the servo linear motion system (9) pushes the connecting shaft (5) to move linearly to drive the second eccentric body (2) to rotate in the circumferential direction, the first eccentric body (1) is fixed in position, the relative position adjustment of the first eccentric body (1) and the second eccentric body (2) in the circumferential direction is realized, when the eccentric vibrator is adjusted to the required eccentric amount, the servo linear motion system (9) is stopped, and the connecting shaft (5) is locked to output the adjusted stable exciting force.

The improvement measures of the scheme are as follows: and a servo linear motion system actuating mechanism (91) of the servo linear motion system (9) is connected with the connecting shaft (5) through a bearing (15). The servo linear motion system (9) controls the axial position of the servo linear motion system actuator (91) and can lock the position at any position within a stroke range.

Furthermore, the tail end of a servo linear motion system actuating mechanism (91) of the servo linear motion system (9) is provided with a shaft hole (92), the connecting shaft (5) penetrates through the shaft hole (92) and then is connected with the linear motion system actuating mechanism (91) through a third bearing (15), and the outer ring of the third bearing (15) is fixedly connected with the shaft hole (92) through an elastic retainer ring (13); and the inner ring of the third bearing (15) is fixedly connected with the connecting shaft (5) through a shaft elastic retainer ring (16).

The servo linear motion system (9) can be a hydraulic cylinder, an air cylinder, a servo linear motor or other servo linear motion systems; correspondingly, the actuating mechanism (91) of the servo linear motion system is respectively a hydraulic rod, a cylinder rod and a screw rod or the like.

Preferably, the servo linear motion system (9) is a servo linear motor, and the servo linear motion system actuator (91) is a screw.

The second structure of the eccentric vibrator is: the first eccentric body (1) and the second eccentric body (2) are arranged in the inner and outer directions, the first eccentric body (1) is an outer eccentric body, the second eccentric body (2) is an inner eccentric body, the first eccentric body (1) is provided with an inner circumferential surface, the second eccentric body (2) is provided with an outer circumferential surface, and at least one first bearing (41) is arranged between the inner circumferential surface of the first eccentric body (1) and the outer circumferential surface of the second eccentric body (2); the centers of gravity of the second eccentric body (2) and the first eccentric body (1) are deviated from the centre of rotation formed by the connecting shaft (5).

And an output shaft of the excitation motor (8) is fixedly connected with the first eccentric body (1).

The second eccentric body (2) is connected with the connecting shaft (5) through a spiral groove and a boss structure matched with the spiral groove.

The first eccentric body (1) is connected with the connecting shaft (5) through a linear groove and a boss structure matched with the linear groove.

The working principle of the excitation device is as follows:

The improvement of the scheme is that a servo linear motion system actuating mechanism (91) of the servo linear motion system (9) is connected with the connecting shaft (5) through a bearing (15). The servo linear motion system (9) controls the axial position of the servo linear motion system actuator (91) and can lock the position at any position within a stroke range.

The servo linear motion system (9) can be a hydraulic cylinder, an air cylinder, a servo linear motor or a servo linear motion system; correspondingly, the actuating mechanism (91) of the servo linear motion system is respectively a hydraulic rod, a cylinder rod and a screw rod or the like.

The first eccentric body (1) is provided with a left shaft platform (10) which is coaxial with the first bearing 41, and the left shaft platform (10) is provided with a first shaft hole (11) which is coaxial with the first bearing 41.

An output shaft of the excitation motor (8) penetrates through the first shaft hole (11) to be fixedly connected with the first eccentric body (1).

Furthermore, an output shaft of the excitation motor (8) is matched and fixed in a first shaft hole (11) of the left shaft platform (10) of the first eccentric body (1) through a key slot.

The second eccentric body (2) is provided with a second shaft hole (21); the connecting shaft (5) is connected with the second shaft hole (21) through a spiral groove and a boss structure matched with the spiral groove.

Furthermore, a right end cover (3) is arranged on the right side of the first eccentric body (1) and the second eccentric body (2), and the right end cover (3) is fixedly connected with the first eccentric body (1); the right end cover (3) is tightly attached to the right side face of the outer ring of the first bearing (41); the right end cover (3) is provided with a third shaft hole (31) which is coaxial with the first bearing (41); the connecting shaft (5) and the third shaft hole (31) are connected through a linear groove and a boss structure matched with the linear groove.

The tail end of a servo linear motion system actuating mechanism (91) of the servo linear motion system (9) is provided with a shaft hole (92), the connecting shaft (5) penetrates through the shaft hole (92) and then is connected with the linear motion system actuating mechanism (91) through a third bearing (15), and the outer ring of the third bearing (15) is fixedly connected with the shaft hole (92) through an elastic retainer ring (13); and the inner ring of the third bearing (15) is fixedly connected with the connecting shaft (5) through a shaft elastic retainer ring (16).

Preferably, a protruding pressing ring (32) is arranged on the left side of the right end cover (3), and the pressing ring (32) abuts against the right side face of the outer ring of the first bearing (41).

The further improvement scheme is as follows: the inner circumference surface of the first eccentric body (1) is provided with a first inner step surface (12) in the direction away from the axis, the outer circumference surface of the second eccentric body (2) is provided with a first outer step surface (22) in the direction close to the axis, the first inner step surface (12) and the first outer step surface (22) form a first step surface, and the left side surface of the inner ring and the outer ring of the first bearing (41) are located on the first step surface.

Furthermore, a retainer ring (25) is arranged on the outer circumferential surface of the second eccentric body (2), the retainer ring (25) is positioned on the right side of the inner ring of the first bearing (41), and the retainer ring (25) is fixedly connected with the second eccentric body (2).

Further, first eccentric body (1) with set up second bearing (42) between second eccentric body (2), first eccentric body (1) interior circumferential surface is equipped with first interior step face (12) to the direction of keeping away from the axle center, second eccentric body (2) outer circumferential surface intermediate position is equipped with bulge loop (23) to the direction of keeping away from the axle center, the left side step face of bulge loop (23) with form between first interior step face (12) and hold the space of second bearing (42), the right side step face of bulge loop (23) with form between clamping ring (32) of right-hand member lid (3) and hold the space of first bearing (41).

Further, a support ring (43) is provided between the first bearing (41) outer ring and the second bearing (42) outer ring.

Further, the connecting shaft (5) is sequentially provided with a first spiral groove (51) and a first straight line groove (52) from left to right; a first boss (24) matched with the first spiral groove (51) is arranged on the inner wall of a second shaft hole (21) of the second eccentric body (2); and a second boss (33) matched with the first linear groove (52) is arranged on the inner wall of a third shaft hole (31) of the right end cover (3).

Preferably, at least two first bosses (24) are arranged on a track line matched with the first spiral groove (51); at least two second bosses (33) are arranged on a track line matched with the first linear groove (52).

The other scheme is as follows: a second spiral groove is formed in the inner wall of a second shaft hole (21) of the second eccentric body (2); a second linear groove is formed in the inner wall of a third shaft hole (31) of the right end cover (3); and the connecting shaft (5) is sequentially provided with a third boss matched with the second spiral groove and a fourth boss matched with the second linear groove from left to right.

Preferably, at least two third bosses are arranged on a track line matched with the second spiral groove; and at least two fourth bosses are arranged on a track line matched with the second straight line groove.

Compared with the prior art, the vibration excitation device provided by the invention can adjust the eccentric magnitude, namely the vibration excitation force, at any rotating speed. The vibration exciter is adjusted to be minimum in eccentricity when being started, and the eccentricity is adjusted to a set value after the vibration exciter is started to reach a set speed, so that an electric element and a vibration exciting motor are effectively protected, and the damage caused by overlarge current is avoided. The parameters can be more accurately controlled by adjusting the exciting force during the operation of the vibration equipment. The whole excitation force adjustment is matched with the electrical control, so that the method is simple and convenient, and is more suitable for the automatic control of the whole vibration process.

Drawings

FIG. 1 is a schematic structural view of example 5 of the present invention;

FIG. 2 is a schematic structural view of embodiment 6 of the present invention;

fig. 3 is a schematic structural diagram of embodiment 7 of the present invention.

The bearing comprises a bearing body 1, a first eccentric body 10, a left boss 11, a first shaft hole 12, a first inner step surface 2, a second eccentric body 21, a second shaft hole 22, a first outer step surface 23, a convex ring 24, a second boss 25, a retainer ring 3, a right end cover 31, a third shaft hole 32, a press ring 33, a third boss 41, a first bearing 42, a second bearing 43, a support ring 5, a connecting shaft 51, a spiral groove 52, a linear groove 8, an excitation motor 9, a servo linear motion system 91, a servo linear motion system actuating mechanism 13, a hole elastic retainer ring 15, a third bearing 16 and a shaft elastic retainer ring.

Detailed Description

The invention will now be described in detail, by way of example, with reference to the accompanying drawings.

Example 1:

as shown in fig. 1, the excitation device comprises an eccentric vibrator, an excitation motor 8 for driving the eccentric vibrator to rotate, and a servo linear motion system 9 for adjusting the eccentric amount of the eccentric vibrator; the eccentric oscillator comprises a first eccentric body 1, a second eccentric body 2 and a connecting shaft 5, wherein the first eccentric body 1 and the second eccentric body 2 are arranged in parallel in the left-right direction, the first eccentric body 1 is a left eccentric body, the second eccentric body 2 is a right eccentric body, and the gravity center of the second eccentric body 2 and the gravity center of the first eccentric body 1 are deviated from a rotation center formed by the connecting shaft 5.

The first eccentric body 1 is provided with a left pillow block 10, and the left pillow block 10 is provided with a first shaft hole 11. The output shaft of the excitation motor 8 is fixed on the left part of the first shaft hole 11 through a key slot in a matching way.

A straight line groove is formed in the right side of the first shaft hole 11, and a first boss matched with the straight line groove is arranged on the connecting shaft 5; a second shaft hole 21 is formed in the second eccentric body 2, a spiral groove is formed in the second shaft hole 2, and a second boss matched with the spiral groove is arranged on the connecting shaft 5. The number of the first bosses is 1, and the first bosses are arranged on a track line matched with the linear grooves; the number of the second bosses is 1, and the second bosses are arranged on a track line matched with the spiral groove.

The servo linear motion system actuator 91 of the servo linear motion system 9 is connected with the connecting shaft 5 through a bearing 15. The servo linear motion system 9 controls the axial position of the servo linear motion system actuator 91 and can lock the position at any position within the stroke range.

The servo linear motion system 9 can be a hydraulic cylinder, an air cylinder, a servo linear motor or a servo linear motion system; correspondingly, the actuating mechanism 91 of the servo linear motion system is a hydraulic rod, a cylinder rod, a screw rod or the like.

In this embodiment, the servo linear motion system 9 is a servo linear motor, and the servo linear motion system actuator 91 is a screw.

The tail end of a servo linear motion system executing mechanism 91 of the servo linear motion system 9 is provided with a shaft hole 92, the connecting shaft 5 is connected with the linear motion system executing mechanism 91 through a third bearing 15 after penetrating through the shaft hole 92, and the outer ring of the third bearing 15 is fixedly connected with the shaft hole 92 through an elastic retainer ring 13; the inner ring of the third bearing 15 is fixedly connected with the connecting shaft 5 through a shaft elastic retainer ring 16.

Example 2:

the same as the embodiment 1, except that there are 1 first bosses arranged on a trajectory line matched with the linear groove; the number of the second bosses is 1, and the second bosses are arranged on a track line matched with the spiral groove

Example 3:

the structure is the same as that in the embodiment 1, except that a linear groove is arranged on the left side of the connecting shaft 5, and a third boss matched with the linear groove is arranged in the first shaft hole 11; the right side of the connecting shaft 5 is provided with a spiral groove, and a fourth boss matched with the spiral groove is arranged in the second shaft hole 2.

The number of the third bosses is 1, and the third bosses are arranged on a track line matched with the linear grooves; the number of the fourth bosses is 1, and the fourth bosses are arranged on a track line matched with the spiral groove.

Example 4:

the same as embodiment 3, except that there are 2 third bosses provided on a locus line fitting the linear groove; and 2 fourth bosses are arranged on a track line matched with the spiral groove.

Example 5:

as shown in fig. 2, the excitation device includes an eccentric oscillator, an excitation motor 8 for driving the eccentric oscillator to rotate, and a servo linear motion system 9 for adjusting the eccentric amount of the eccentric oscillator.

The eccentric vibrator comprises a first eccentric body 1, a second eccentric body 2 and a connecting shaft 5, wherein the first eccentric body 1 and the second eccentric body 2 are arranged in the inner direction and the outer direction. The first eccentric body 1 has an inner circumferential surface, the second eccentric body 2 has an outer circumferential surface, and a first bearing 41 is arranged between the inner circumferential surface of the first eccentric body 1 and the outer circumferential surface of the second eccentric body 2; the centers of gravity of the second eccentric body 2 and the first eccentric body 1 are deviated from the center of rotation formed by the connecting shaft 5.

The first eccentric body 1 is provided with a left pillow block 10 which is coaxial with the first bearing 41, and the left pillow block 10 is provided with a first shaft hole 11 which is coaxial with the first bearing 41; the output shaft of the excitation motor 8 is fixed in the first shaft hole 11 of the left shaft platform 10 of the first eccentric body 1 through key slot matching.

The second eccentric body 2 is provided with a second shaft hole 21 which is coaxial with the first bearing 41; a right end cover 3 is arranged on the right sides of the first eccentric body 1 and the second eccentric body 2, and the right end cover 3 is fixedly connected with the first eccentric body 1; the right end cover 3 is tightly attached to the right side surface of the outer ring of the first bearing 41; the right end cover 3 is provided with a third shaft hole 31 which is coaxial with the first bearing 41; the connecting shaft 5 is provided with a first spiral groove 51 and a first straight line groove 52 from left to right in sequence; a first boss 24 matched with the first spiral groove 51 is arranged on the inner wall of the second shaft hole 21 of the second eccentric body 2; and a second boss 33 matched with the first straight groove 52 is arranged on the inner wall of the third shaft hole 31 of the right end cover 3.

The number of the first bosses 24 may be 1 or more, and is arranged on a trajectory line cooperating with the first spiral groove 51; the number of the second bosses 33 may be 1 or more, and are disposed on a trajectory line that is engaged with the first linear groove 52.

The servo linear motion system 9 is a servo linear motor, the servo linear motion system actuator 91 is a screw, the tail end of the screw is provided with a shaft hole 92, the connecting shaft 5 passes through the shaft hole 92 and then is connected with the screw through a third bearing 15, and the outer ring of the third bearing 15 is fixedly connected with the shaft hole 92 through a hole and an elastic retainer ring 13; the inner ring of the third bearing 15 is fixedly connected with the connecting shaft 5 through a shaft elastic retainer ring 16.

The left side of the right end cover 3 is provided with a raised pressing ring 32, and the pressing ring 32 is abutted against the right side face of the outer ring of the first bearing 41.

The inner circumferential surface of the first eccentric body 1 is provided with a first inner step surface 12 in the direction away from the axis, the outer circumferential surface of the second eccentric body 2 is provided with a first outer step surface 22 in the direction close to the axis, the first inner step surface 12 and the first outer step surface 22 form a first step surface, and the left side surfaces of the inner ring and the outer ring of the first bearing 41 are located on the first step surface.

A retainer ring 25 is arranged on the outer circumferential surface of the second eccentric body 2, the retainer ring 25 is positioned on the right side of the inner ring of the first bearing 41, and the retainer ring 25 is fixedly connected with the second eccentric body 2.

Example 6:

the same as embodiment 5, except that the inner wall of the second shaft hole 21 of the second eccentric body 2 is provided with a second spiral groove; a second linear groove is formed in the inner wall of a third shaft hole 31 of the right end cover 3; and the connecting shaft 5 is sequentially provided with a third boss matched with the second spiral groove and a fourth boss matched with the second linear groove from left to right.

The number of the third bosses can be 1 or more, and the third bosses are arranged on a track line matched with the second spiral groove; the number of the fourth bosses can be 1 or more, and the fourth bosses are arranged on a track line matched with the second straight-line groove.

Example 7:

as shown in fig. 3, the same as embodiment 5, except that a second bearing 42 is provided between the first eccentric body 1 and the second eccentric body 2, a first inner step surface 12 is provided on the inner circumferential surface of the first eccentric body 1 in a direction away from the axis, a protruding ring 23 is provided at a middle position of the outer circumferential surface of the second eccentric body 2 in a direction away from the axis, a space for accommodating the second bearing 42 is formed between the left step surface of the protruding ring 23 and the first inner step surface 12, and a space for accommodating the first bearing 41 is formed between the right step surface of the protruding ring 23 and the pressing ring 32 of the right end cap 3. A support ring 43 is provided between the outer race of the first bearing 41 and the outer race of the second bearing 42.

Example 8:

the same as embodiment 7, except that the inner wall of the second shaft hole 21 of the second eccentric body 2 is provided with a second spiral groove; a second linear groove is formed in the inner wall of a third shaft hole 31 of the right end cover 3; and the connecting shaft 5 is sequentially provided with a third boss matched with the second spiral groove and a fourth boss matched with the second linear groove from left to right.

Claims

1. The excitation device comprises an eccentric vibrator and an excitation motor (8) for driving the eccentric vibrator to rotate, and is characterized by further comprising a servo linear motion system (9) for adjusting the eccentric amount of the eccentric vibrator; the eccentric oscillator at least comprises a first eccentric body (1), a second eccentric body (2) and a connecting shaft (5), wherein the first eccentric body (1) and at least one of the second eccentric body (2) are connected with the connecting shaft (5) through spiral grooves and boss structures matched with the spiral grooves, and a servo linear motion system (9) is connected with the connecting shaft (5).

2. The excitation device as claimed in claim 1, wherein the first eccentric body (1) and the second eccentric body (2) are arranged side by side in the left-right direction, the first eccentric body (1) is a left eccentric body, the second eccentric body (2) is a right eccentric body, and the gravity centers of the second eccentric body (2) and the first eccentric body (1) are deviated from the rotation center formed by the connecting shaft (5); the first eccentric body (1) is fixedly connected with an output shaft of the excitation motor (8), and the servo linear motion system (9) is fixedly connected with the connecting shaft (5) in the axial direction and rotatably connected with the connecting shaft in the surface circumferential direction.

3. The excitation device as claimed in claim 2, characterized in that the first eccentric body (1) is connected to the connecting shaft (5) by means of a linear groove and a cam structure cooperating with the linear groove; the second eccentric body (2) is connected with the connecting shaft (5) through a spiral groove and a boss structure matched with the spiral groove.

4. Excitation device according to claim 3, characterized in that the first eccentric body (1) is provided with a left pillow block (10), and the left pillow block (10) is provided with a first shaft hole (11).

5. The excitation device as claimed in claim 4, wherein the output shaft of the excitation motor (8) is fixed to the left side portion of the first shaft hole (11) by spline fitting.

6. The excitation device as claimed in claim 5, wherein a straight groove is arranged at the right side part of the first shaft hole (11), and a first boss matched with the straight groove is arranged at the left side of the connecting shaft (5); a second shaft hole (21) is formed in the second eccentric body (2), a spiral groove is formed in the second shaft hole (2), and a second boss matched with the spiral groove is arranged on the right side of the connecting shaft (5).

7. The excitation device as claimed in claim 6 wherein there are at least two first bosses disposed on a locus line matching the linear groove; and at least two second bosses are arranged on a track line matched with the spiral groove.

8. The excitation device as claimed in claim 5, wherein a straight groove is arranged on the left side of the connecting shaft (5), and a third boss matched with the straight groove is arranged in the first shaft hole (11); the right side of the connecting shaft (5) is provided with a spiral groove, and a fourth boss matched with the spiral groove is arranged in the second shaft hole (2).

9. The excitation device as claimed in claim 8, wherein at least two of the third bosses are disposed on a locus line matching the linear groove; and at least two fourth bosses are arranged on the track line matched with the spiral groove.

10. Excitation device according to any of claims 1 to 9, characterized in that the servo linear motion system actuator (91) of the servo linear motion system (9) is connected to the connection shaft (5) by means of a bearing (15).

11. The excitation device according to claim 10, wherein a shaft hole (92) is formed at the tail end of a servo linear motion system actuator (91) of the servo linear motion system (9), the connecting shaft (5) passes through the shaft hole (92) and then is connected with the linear motion system actuator (91) through a third bearing (15), and an outer ring of the third bearing (15) is fixedly connected with the shaft hole (92) through an elastic collar (13); and the inner ring of the third bearing (15) is fixedly connected with the connecting shaft (5) through a shaft elastic retainer ring (16).

12. The excitation device as claimed in claim 11, wherein said servo linear motion system (9) is a servo linear motor and said servo linear motion system actuator (91) is a screw.