CN211247231U

CN211247231U - Vibration exciter

Info

Publication number: CN211247231U
Application number: CN201921288234.5U
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: 2020-08-14
Anticipated expiration: 2029-08-09
Also published as: WO2021027557A1

Abstract

The utility model provides a vibration exciter, belongs to vibrating machinery technical field, including the eccentric oscillator for hold excitation case (6) of eccentric oscillator, be used for driving rotatory excitation motor (8) of eccentric oscillator, still including servo linear motion system (9) that are used for adjusting eccentric oscillator eccentric volume. The eccentric vibrator comprises an outer eccentric body (1), an inner eccentric body (2) and a connecting shaft (5), wherein the inner eccentric body (2) is connected with the connecting shaft (5) through a spiral groove and a boss structure matched with the spiral groove; the outer eccentric body (1) is connected with the connecting shaft (5) through a linear groove and a boss structure matched with the linear groove; the servo linear motion system (9) is fixedly connected with the connecting shaft (5) in the axial direction and is rotatably connected with the surface in the circumferential direction. The utility model provides a vibration exciter can be at the size of static or arbitrary rotational speed adjustment exciting force down.

Description

Vibration exciter

Technical Field

The utility model belongs to the technical field of vibrating machinery, concretely relates to install vibration exciter on vibrating machinery equipment.

Background

The vibration exciter is a device which is arranged on the 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 exciter 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 exciter mainly comprises a motor and an eccentric vibrator, wherein the motor drives the eccentric vibrator to move to generate mechanical vibration. The vibration exciter can only control the vibration frequency by controlling the rotating speed of the exciting motor, and is not easy to carry out amplitude control (exciting force control). The excitation motor needs to be stopped to manually adjust the eccentricity of the vibration exciter 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 singly comprises the steps of loosening the eccentric fastening screw, adjusting the eccentricity, fastening the eccentric fastening 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 exciters is that they must be set to a large eccentricity when stopped when a large exciting 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.

SUMMERY OF THE UTILITY MODEL

The utility model provides a vibration exciter of real-time control exciting force size in equipment working process.

The vibration exciter comprises an eccentric vibrator, a vibration excitation box (6) for accommodating the eccentric vibrator, a vibration 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 excitation motor (8) is fixedly connected with the excitation box (6); and the servo linear motion system (9) is fixedly connected with the excitation box (6).

Further, the eccentric vibrator comprises an outer eccentric body (1), an inner eccentric body (2) and a connecting shaft (5), wherein the outer eccentric body (1) is provided with an inner circumferential surface, the inner 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 outer eccentric body (1) and the outer circumferential surface of the inner eccentric body (2); the centers of gravity of the inner eccentric body (2) and the outer eccentric body (1) are deviated from the centre of rotation formed by the first bearing (41); the inner eccentric body (2) is connected with the connecting shaft (5) through a spiral groove and a boss structure matched with the spiral groove; the outer eccentric body (1) is connected with the connecting shaft (5) through a linear groove and a boss structure matched with the linear groove; the servo linear motion system (9) is fixedly connected with the connecting shaft (5) in the axial direction and is rotatably connected with the surface in the circumferential direction.

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 fifth bearing (15), and the outer ring of the fifth bearing (15) is fixedly connected with the shaft hole (92) through an elastic retainer ring (17); the inner ring of the fifth bearing (15) is fixedly connected with the connecting shaft (5) through a shaft elastic retainer ring (16).

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

Further, the inner eccentric body (2) is provided with a second shaft hole (21) which is coaxial with the first bearing (41); 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 sides of the outer eccentric body (1) and the inner eccentric body (2), and the right end cover (3) is fixedly connected with the outer 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.

Furthermore, a first through hole is formed in the joint of the excitation box (6) and the excitation motor (8), and an output shaft of the excitation motor (8) penetrates through the first through hole and then is fixed in a first shaft hole (11) of a left shaft platform (10) of the outer eccentric body (1); and a third bearing (14) is arranged between the outer peripheral surface of the left pillow block (10) and the first through hole.

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 outer eccentric body (1) through a key slot.

Furthermore, the excitation box (6) is provided with an excitation box cover (7), and the servo linear motion system (9) is fixedly connected with the excitation box cover (7); the excitation box cover (7) is provided with an excitation box cover through hole (71). The servo linear motion system actuating mechanism (91) is connected with one end of the connecting shaft (5) through a fifth bearing (15), and the outer ring of the fifth bearing (15) is fixedly connected with the servo linear motion system actuating mechanism (91) through a hole by an elastic retainer ring (17); the inner ring of the fifth bearing (15) is fixedly connected with the connecting shaft (5) through a shaft elastic retainer ring (16).

The servo linear motion system (9) is fixedly connected with the excitation box cover (7), wherein one specific connection mode is as follows: the periphery of the excitation box cover through hole (71) of the excitation box cover (7) is provided with a flange (72), and the servo linear motion system (9) is fixedly connected with the flange (72).

Another specific connection mode is as follows: the servo linear motion system (9) is provided with a servo linear motion system seat (13), and the servo linear motion system seat (13) is fixedly connected with the excitation box cover (7); the excitation box cover through hole (71) is positioned at the center of the connection position of the excitation box cover (7) and the servo linear motion system seat (13). A servo linear motion system seat through hole (131) is formed in the servo linear motion system seat (13), and a servo linear motion system actuating mechanism (91) of the servo linear motion system (9) penetrates through the servo linear motion system seat through hole (131) and then is connected with one end of the connecting shaft (5) through a fifth bearing (15).

Furthermore, a right end cover bearing pedestal (34) is arranged on the right side of a third shaft hole (31) of which the right end cover (3) and the first bearing (41) are coaxial, and a fourth bearing (141) is arranged between the right end cover bearing pedestal (34) and the excitation box cover through hole 71.

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 fifth bearing (15), and the outer ring of the fifth bearing (15) is fixedly connected with the hole of the servo linear motion system actuating mechanism (91) through an elastic retainer ring (17); the inner ring of the fifth bearing (15) is fixedly connected with the connecting shaft (5) through a shaft elastic retainer ring (16).

Further, be equipped with first interior step face (12) on the interior circumference surface of outer eccentric body (1) to the direction of keeping away from the axle center, be equipped with first outer step face (22) on the outer circumference surface of inner eccentric body (2) to the direction of being close to the axle center, first interior step face (12) with first outer step face (22) form first step face, the inside and outside lane left surface of first bearing (41) is located on the first step face.

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

The other scheme is as follows: outer eccentric body (1) with set up second bearing (42) between the interior eccentric body (2), outer eccentric body (1) interior circumferential surface is equipped with first interior step face (12) in the direction of keeping away from the axle center, interior eccentric body (2) outer circumferential surface intermediate position is equipped with bulge loop (23) in 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 the second shaft hole (21) of the inner 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 that a second spiral groove is formed in the inner wall of a second shaft hole (21) of the inner 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.

The preferred scheme is as follows: 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.

The vibration exciter has the working principle that:

due to the arrangement of the first bearing (41), the second bearing (42), the third bearing (14), the fifth bearing (15) and the fourth bearing (141), the output shaft of the excitation motor (8) drives the outer eccentric body (1) to rotate, the outer eccentric body (1) drives the right end cover (3) to synchronously rotate, the right end cover (3) drives the connecting shaft (5) to synchronously rotate, the connecting shaft (5) drives the inner eccentric body (2) to synchronously rotate, and finally the outer eccentric body (1) and the inner eccentric body (2) are synchronously rotated. That is, the exciting motor (8) drives the whole eccentric vibrator to rotate synchronously, and an exciting force is generated. Meanwhile, due to the arrangement of the bearing, the servo linear motion system actuating mechanism (91) synchronously acts with the connecting shaft (5) in the axial direction, but keeps immovable in the radial direction and does not synchronously rotate with the connecting shaft (5), so that the vibration excitation motor (8) is prevented from transmitting rotation to the servo linear motion system actuating mechanism (91) through the rotating shaft (5).

Under static or arbitrary rotational speed, when the exciting force of vibration exciter needs to be adjusted, servo linear motion system (9) is controlled to make servo linear motion system actuating mechanism (91) linearly move leftwards or rightwards along the axial direction, servo linear motion system actuating mechanism (91) drives connecting shaft (5) axial direction linear motion drives interior eccentric body (2) is relative rotation in circumference to the adjustment outer eccentric body (1) with relative contained angle between interior eccentric body (2) reaches the purpose of adjusting the exciting force.

Compared with the prior art, the utility model provides a vibration exciter can adjust eccentric size under arbitrary rotational speed, adjusts exciting force size promptly. 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 an exploded schematic view of a vibration exciter according to embodiment 1 of the present invention;

fig. 2 is a schematic view of an assembly structure of a vibration exciter of the present invention;

fig. 3 is an exploded schematic view of a vibration exciter according to embodiment 2 of the present invention;

fig. 4 is an assembly structure schematic diagram of a vibration exciter according to embodiment 2 of the present invention;

fig. 5 is a schematic structural view of an eccentric vibrator of a vibration exciter of the present invention;

fig. 6 is a schematic structural diagram of another eccentric vibrator of the vibration exciter of the present invention.

Wherein, 1, the outer eccentric body 10, the left boss 11, the first shaft hole 12, the first inner step surface 2, the inner eccentric body 21, the second shaft hole 22, the first outer step surface 23, the convex ring 24, the second boss 25, the retainer ring 3, the right end cover 31, the third shaft hole 32, the press ring 33, the third boss 34, the right end cover boss 41, the first bearing 42, the second bearing 43, the support ring 5, the connecting shaft 51, the spiral groove 52, the linear groove 6, the excitation box 7, the excitation box cover 71, the excitation box cover through hole 72, the flange 8, the excitation motor 9, the servo linear motion system 91, the servo linear motion system actuating mechanism 92, the shaft hole 13, the servo linear motion system seat 131, the servo linear motion system seat through hole 14, the third bearing 141, the fourth bearing 15, the fifth bearing 16, the servo linear motion system seat through hole 14, a circlip for shaft 17, a circlip for hole.

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, 2 and 5, the vibration exciter comprises an eccentric vibrator, a vibration box 6 for accommodating the eccentric vibrator, a vibration 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 vibrator comprises an outer eccentric body 1, an inner eccentric body 2 and a connecting shaft 5, wherein the outer eccentric body 1 is provided with an inner circumferential surface, the inner eccentric body 2 is provided with an outer circumferential surface, and a first bearing 41 and a second bearing 42 are arranged between the inner circumferential surface of the outer eccentric body 1 and the outer circumferential surface of the inner eccentric body 2; the centers of gravity of the inner eccentric body 2 and the outer eccentric body 1 are offset from the center of rotation formed by the first bearing 41 and the second bearing 42.

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

A support ring 43 is provided between the outer race of the first bearing 41 and the outer race of the second bearing 42.

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 of the outer ring of the first bearing 41.

The left side of the outer 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 inner eccentric body 2 is provided with a second shaft hole 21 coaxial with 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; the inner wall of the third shaft hole 31 is provided with a second boss 33 matched with the first straight groove 52.

Two first bosses 24 are arranged on a track line matched with the first spiral groove 51; the second bosses 33 are two and are disposed on a locus line which is matched with the first straight groove 52.

The excitation motor 8 is fixedly connected with the excitation box 6.

A first through hole is formed at the joint of the excitation box 6 and the excitation motor 8, and an output shaft of the excitation motor 8 passes through the first through hole and then is fixed in a first shaft hole 11 of a left shaft platform 10 of the outer eccentric body 1; a third bearing 14 is arranged between the outer peripheral surface of the left pillow block 10 and the first through hole.

The excitation box 6 is provided with an excitation box cover 7, and the servo linear motion system 9 is fixedly connected with the excitation box cover 7; the center of the excitation box cover 7 is provided with an excitation box cover through hole 71. The excitation box cover 7 is provided with a flange 72 around the excitation box cover through hole 71, and the servo linear motion system 9 is fixedly connected with the flange 72.

A right end cover bearing block 34 is arranged on the right side of a third shaft hole 31 of the right end cover 3 and the first bearing 41, and a fourth bearing 141 is arranged between the right end cover bearing block 34 and the excitation box cover through hole 71.

The excitation box cover 7 is provided with an excitation box cover through hole 71, the servo linear motion system 9 can be a hydraulic cylinder, an air cylinder or a servo linear motor, and the servo linear motor is adopted in the embodiment. The servo linear motor actuator 91 is a screw.

The screw of the servo linear motor actuating mechanism 91 penetrates through the through hole 71 of the excitation box cover and then is connected with one end of the connecting shaft 5 through a fifth bearing 15. The outer ring of the fifth bearing 15 is fixedly connected with the servo linear motor actuator 91 through a hole by an elastic retainer ring 17; the inner ring of the fifth bearing 15 is fixedly connected with the connecting shaft 5 through an elastic retainer ring 16 for a shaft.

The output shaft of the excitation motor 8 is fixed in the first shaft hole 11 of the left shaft platform 10 of the outer eccentric body 1 through key slot matching.

Example 2:

the same as in embodiment 1, except that the servo linear motion system 9 is fixedly connected to the excitation box cover 7 in a different manner. The connection mode provided by the embodiment is as follows: the servo linear motion system 9 is provided with a servo linear motion system seat 13, and the servo linear motion system seat 13 is fixedly connected with the excitation box cover 7; the excitation box cover through hole 71 is positioned at the center of the connection position of the excitation box cover 7 and the servo linear motion system base 13. The servo linear motion system seat 13 is provided with a servo linear motion system seat through hole 131, and a servo linear motion system actuating mechanism 91 of the servo linear motion system 9 penetrates through the servo linear motion system seat through hole 131 and then is connected with one end of the connecting shaft 5 through a fifth bearing 15.

Example 3;

the same as embodiment 1, except that the inner wall of the second shaft hole 21 is provided with a second spiral groove; a second linear groove is formed in the inner wall of the third shaft hole 31; 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 two third bosses are arranged on a track line matched with the second spiral groove; and the number of the fourth bosses is two, and the fourth bosses are arranged on a track line matched with the second linear groove.

Example 4:

the same as embodiment 1, except that only one bearing, i.e., a first bearing 41, is provided between the inner circumferential surface of the outer eccentric body 1 and the outer circumferential surface of the inner eccentric body 2 as shown in fig. 6.

Outer eccentric body 1 the interior circumference surface is equipped with first interior step 12 to the direction of keeping away from the axle center, interior eccentric body 2 the exterior circumference surface is equipped with first outer step 22 to the direction of being close to the axle center, first interior step 12 with first outer step 22 forms first step, the first bearing 41 inside and outside circle left surface is located on the first step. 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 of the outer ring of the first bearing 41.

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

The right side of the outer eccentric body 1 and the right side of the inner eccentric body 2 are provided with a right end cover 3, and the right end cover 3 is fixedly connected with the outer 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.

Example 5:

the same as embodiment 4, except that the inner wall of the second shaft hole 21 is provided with a second spiral groove; a second linear groove is formed in the inner wall of the third shaft hole 31; 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.

Example 6:

the difference from the embodiment 1 is that the servo linear motion system 9 is a servo hydraulic cylinder, the servo hydraulic cylinder actuator 91 is a hydraulic cylinder rod, and the hydraulic cylinder rod 91 passes through the excitation box cover through hole 71 and is connected to one end of the connecting shaft 5 through a fifth bearing 15. The outer ring of the fifth bearing 15 is fixedly connected with the hydraulic cylinder rod 91 through a hole by an elastic retainer ring 17; the inner ring of the fifth bearing 15 is fixedly connected with the connecting shaft 5 through an elastic retainer ring 16 for a shaft.

Example 7:

the same as embodiment 1, except that the servo linear motion system 9 is an air cylinder, the servo linear motor actuator 91 is an air cylinder rod, and the air cylinder rod 91 passes through the excitation box cover through hole 71 and is connected with one end of the connecting shaft 5 through a fifth bearing 15. The outer ring of the fifth bearing 15 is fixedly connected with the cylinder rod 91 through a hole by an elastic retainer ring 17; the inner ring of the fifth bearing 15 is fixedly connected with the connecting shaft 5 through an elastic retainer ring 16 for a shaft.

Claims

1. A vibration exciter comprises an eccentric vibrator, a vibration excitation box (6) for accommodating the eccentric vibrator, and a vibration 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 excitation motor (8) is fixedly connected with the excitation box (6); the servo linear motion system (9) is fixedly connected with the excitation box (6); the eccentric vibrator comprises an outer eccentric body (1), an inner eccentric body (2) and a connecting shaft (5), wherein the outer eccentric body (1) is provided with an inner circumferential surface, the inner 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 outer eccentric body (1) and the outer circumferential surface of the inner eccentric body (2); the centers of gravity of the inner eccentric body (2) and the outer eccentric body (1) are deviated from the centre of rotation formed by the first bearing (41); the inner eccentric body (2) is connected with the connecting shaft (5) through a spiral groove and a boss structure matched with the spiral groove; the outer eccentric body (1) is connected with the connecting shaft (5) through a linear groove and a boss structure matched with the linear groove; the servo linear motion system (9) is fixedly connected with the connecting shaft (5) in the axial direction and is rotatably connected with the surface in the circumferential direction.

2. The vibration exciter according to claim 1, wherein a shaft hole (92) is formed in the tail end of a servo linear motion system actuator (91) of the servo linear motion system (9), the connecting shaft (5) penetrates through the shaft hole (92) and then is connected with the linear motion system actuator (91) through a fifth bearing (15), and the outer ring of the fifth bearing (15) is fixedly connected with the shaft hole (92) through a hole by an elastic check ring (17); the inner ring of the fifth bearing (15) is fixedly connected with the connecting shaft (5) through a shaft elastic retainer ring (16).

3. The vibration exciter according to claim 2, characterized in that the servo linear motion system (9) is a hydraulic cylinder and the servo linear motion system actuator (91) is a hydraulic rod.

4. The vibration exciter according to claim 2, characterized in that said servo linear motion system (9) is a cylinder and said servo linear motion system actuator (91) is a cylinder rod.

5. The vibration exciter according to claim 2, characterized in that the servo linear motion system (9) is a servo linear motor and the servo linear motion system actuator (91) is a screw.

6. The vibration exciter according to claim 5, characterized in that said inner eccentric body (2) is provided with a second axial hole (21) coaxial with said first bearing (41); 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.

7. The vibration exciter according to claim 6, characterized in that right end covers (3) are arranged at the right sides of the outer eccentric body (1) and the inner eccentric body (2), and the right end covers (3) are fixedly connected with the outer 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.

8. The vibration exciter according to claim 7, characterized in that a first through hole is formed at the joint of the excitation box (6) and the excitation motor (8), and an output shaft of the excitation motor (8) passes through the first through hole and then is fixed in a first shaft hole (11) of the left pillow block (10) of the outer eccentric body (1); and a third bearing (14) is arranged between the outer peripheral surface of the left pillow block (10) and the first through hole.

9. The vibration exciter according to claim 8, characterized in that the excitation box (6) is provided with an excitation box cover (7), and the servo linear motion system (9) is fixedly connected with the excitation box cover (7); the excitation box cover (7) is provided with an excitation box cover through hole (71).

10. The vibration exciter according to claim 9, wherein a right end cover boss (34) is arranged on the right side of a third shaft hole (31) of the right end cover (3) which is coaxial with the first bearing (41), and a fourth bearing (141) is arranged between the right end cover boss (34) and the exciting case cover through hole (71).

11. An exciter according to claim 10, characterised in that the servo linear motion system (9) is a hydraulic cylinder and the servo linear motion system actuator (91) is a hydraulic rod.

12. An exciter according to claim 10, characterised in that the servo linear motion system (9) is a cylinder and the servo linear motion system actuator (91) is a cylinder rod.

13. An exciter according to any of claims 8 to 12, wherein the output shaft of the exciting motor (8) is fixed in the first shaft hole (11) of the left pillow block (10) of the outer eccentric body (1) by spline fitting.

14. An exciter according to claim 13, wherein the inner circumferential surface of the outer eccentric body (1) is provided with a first inner step surface (12) in a direction away from the axial center, the outer circumferential surface of the inner eccentric body (2) is provided with a first outer step surface (22) in a direction close to the axial center, 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.

15. An exciter according to claim 14, characterized in that a collar (25) is provided on the outer circumferential surface of the inner eccentric body (2), said collar (25) being located to the right of the inner ring of the first bearing (41), said collar (25) being fixedly connected to the inner eccentric body (2).

16. The vibration exciter according to claim 15, wherein a second bearing (42) is arranged between the outer eccentric body (1) and the inner eccentric body (2), a first inner step surface (12) is arranged on the inner circumferential surface of the outer eccentric body (1) in the direction away from the axis, a convex ring (23) is arranged in the middle position of the outer circumferential surface of the inner eccentric body (2) in the direction away from the axis, a space for accommodating the second bearing (42) is formed between the left step surface of the convex 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 convex ring (23) and the pressing ring (32) of the right end cover (3).

17. An exciter according to claim 16, characterised in that a support ring (43) is provided between the outer race of the first bearing (41) and the outer race of the second bearing (42).

18. An exciter according to claim 17, wherein the connecting shaft (5) is provided with a first spiral groove (51) and a first straight groove (52) in sequence from left to right; 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 inner 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).

19. An exciter according to claim 18, wherein at least two of said first bosses (24) are provided on a locus line cooperating with said first spiral groove (51); at least two second bosses (33) are arranged on a track line matched with the first linear groove (52).

20. An exciter according to claim 19, wherein the inner wall of the second axial hole (21) of the inner 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.

21. An exciter according to claim 20, wherein at least two of said third bosses are provided on a locus line cooperating with said second spiral groove; and at least two fourth bosses are arranged on a track line matched with the second straight line groove.