CN220663832U - Excitation mechanism, vibrating feeder and mine feeding equipment - Google Patents

Excitation mechanism, vibrating feeder and mine feeding equipment Download PDF

Info

Publication number
CN220663832U
CN220663832U CN202321482033.5U CN202321482033U CN220663832U CN 220663832 U CN220663832 U CN 220663832U CN 202321482033 U CN202321482033 U CN 202321482033U CN 220663832 U CN220663832 U CN 220663832U
Authority
CN
China
Prior art keywords
bearing seat
main
eccentric shaft
auxiliary
gear
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN202321482033.5U
Other languages
Chinese (zh)
Inventor
商圆圆
陈志国
张志业
苏慧慧
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
China Railway Construction Heavy Industry Group Co Ltd
Original Assignee
China Railway Construction Heavy Industry Group Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by China Railway Construction Heavy Industry Group Co Ltd filed Critical China Railway Construction Heavy Industry Group Co Ltd
Priority to CN202321482033.5U priority Critical patent/CN220663832U/en
Application granted granted Critical
Publication of CN220663832U publication Critical patent/CN220663832U/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Abstract

The utility model discloses an excitation mechanism, a vibration feeder and mine feeding equipment, which comprises a plate body, a fixed bearing seat, a movable bearing seat and a thrust device, wherein the thrust device is used for pushing the movable bearing seat to move away from or close to the fixed bearing seat; the device comprises a main eccentric shaft penetrating through a fixed bearing seat, a main gear arranged on the main eccentric shaft and a main eccentric block; the device comprises a secondary eccentric shaft penetrating through the movable bearing seat, a secondary gear arranged on the secondary eccentric shaft and a secondary eccentric block; the driving assembly is used for driving the main eccentric shaft to rotate when the thrust device drives the movable bearing seat to be far away from the fixed bearing seat and the auxiliary gear is disengaged from the main gear, so that the angular position of the main eccentric block is changed, and the vibration direction angle is changed; and the auxiliary eccentric shaft is also used for driving the main eccentric shaft to rotate and driving the auxiliary eccentric shaft to rotate simultaneously when the auxiliary gear is meshed with the main gear so as to drive the main eccentric block and the auxiliary eccentric block to rotate, thereby generating vibration.

Description

Excitation mechanism, vibrating feeder and mine feeding equipment
Technical Field
The utility model relates to the technical field of mining equipment, in particular to an excitation mechanism, a vibration feeder and mining feeding equipment.
Background
The vibration feeder is a machine which utilizes the mechanical vibration principle to realize the sliding or throwing motion of materials in a feeding box, realize the continuous directional conveying of the materials and play a certain role in loosening the viscous materials and the caking materials. Because of its structure is reliable, exciting force is strong, screening efficiency is high, vibration noise is little, sturdy and durable, easy maintenance, characteristics such as safe in utilization, wide application in industries such as metallurgy, colliery, mine, electric power, artifical grit, construction waste recovery, building materials, chemical industry, grain. At present, in the vibration feeder used in the industries of metallurgy, coal, chemical industry, building materials, electric power, light industry and the like in China, most of the vibration direction angles are fixed, and in the process of conveying materials, the feeding amount is small and uneven, so that the maximum potential of the vibration feeder cannot be exerted. Therefore, the mining machinery needs to be capable of carrying out portable adjustment on the vibration direction angle of the feeder, so that the running speeds of the front end material and the rear end material of the vibration feeder are consistent, the yield of the feeder is improved, and the flexibility of wiring of the feeder is improved.
The vibration direction angle is a key parameter influencing the working efficiency, the conveying speed and other performances of the vibration feeder, and is reasonably selected according to the properties and requirements of the processed materials in order to ensure that the vibration feeder has higher working efficiency and higher yield.
In order to realize dynamic adjustment of the vibration direction angle, application CN203544967U provides an adjustment method of the vibration direction angle of a vibration feeder, when the vibration direction angle of the vibration feeder is adjusted, a fixing bolt of the vibrator is loosened, the vibrator is rotated to a certain angle, and then the fixing bolt is fastened. The method has the advantage that the adjustment of the vibration direction angle of the vibration feeder can be realized without disassembling the machine. The method has the defects that the fixing bolt is required to be detached and installed when the vibration direction angle is adjusted, the operation is convenient, and the tightness of the bolt can be influenced by frequent detachment and installation. When adjusting vibrator angle, need carry out with the help of manpower and frock and specialized tool, waste time and energy, the operation degree of difficulty is big. In addition, in the adjusting process of the vibration direction angle, the adjusting size of the vibration direction angle cannot be accurately adjusted, and the adjusting effect is difficult to control.
Disclosure of Invention
The utility model provides an excitation mechanism, a vibration feeder and mine feeding equipment, and aims to solve the technical problems of high operation difficulty and low adjustment accuracy of the vibration direction angle of the conventional vibration feeder.
The technical scheme adopted by the utility model is as follows:
an excitation mechanism applied to a vibration feeder, comprising:
the first thrust plate assembly comprises a plate body, a fixed bearing seat arranged on the plate body, a movable bearing seat arranged on the plate body and a thrust device arranged on the movable bearing seat, wherein the thrust device is used for pushing the movable bearing seat to move away from or close to the fixed bearing seat;
the second thrust plate assembly has the same structure as the first thrust plate assembly and is symmetrically distributed with the first thrust plate mechanism;
the main eccentric assembly comprises a main eccentric shaft penetrating through the fixed bearing seat, a main gear arranged on the main eccentric shaft and a main eccentric block arranged on the main eccentric shaft;
the auxiliary eccentric assembly comprises an auxiliary eccentric shaft penetrating through the movable bearing seat, an auxiliary gear arranged on the auxiliary eccentric shaft and an auxiliary eccentric block arranged on the auxiliary eccentric shaft, and the auxiliary gear is used for being meshed with the main gear;
the driving assembly is used for driving the main eccentric shaft to rotate when the thrust device drives the movable bearing seat to be away from the fixed bearing seat and the auxiliary gear to be disengaged from the main gear, so that the angular position of the main eccentric block is changed, and the vibration direction angle is changed; and the auxiliary eccentric shaft is also used for driving the main eccentric shaft to rotate and driving the auxiliary eccentric shaft to rotate simultaneously when the auxiliary gear is meshed with the main gear so as to drive the main eccentric block and the auxiliary eccentric block to rotate, thereby generating vibration.
As a further improvement of the technical scheme, the plate body is provided with an identification component for identifying the offset distance of the movable bearing seat relative to the meshing position of the main gear and the auxiliary gear.
As a further improvement of the above technical solution, the marking assembly includes a scale fixedly disposed on the plate body and a first ear plate slidably connected to the plate body along the motion direction of the thrust device, the first ear plate is fixedly connected with the movable bearing seat so as to move along with the movable bearing seat, and a pointer facing the scale of the scale is disposed on the first ear plate.
As a further improvement of the above technical solution, the identification assembly further includes a second ear plate disposed parallel to the first ear plate, and the second ear plate is slidably connected to the plate body and fixedly connected to the movable bearing seat.
As a further improvement of the above technical solution, an arc dial is provided at an end of the main eccentric shaft, and a pointer of the arc dial is used for synchronously rotating when changing the angular position of the main gear along with the rotation of the main eccentric shaft.
As a further improvement of the above technical solution, the main gear is disposed at the first end of the main eccentric shaft, and the auxiliary gear is disposed at the first end of the auxiliary eccentric shaft; the second end of the main eccentric shaft is provided with a belt wheel, and the driving assembly comprises a motor which is in driving connection with the belt wheel at the second end of the main eccentric shaft through a V-belt.
As a further improvement of the technical scheme, the thrust device is an electro-hydraulic push rod, the fixed end of the electro-hydraulic push rod is fixedly connected with the fixed bearing seat, and the piston end of the electro-hydraulic push rod is fixedly connected with the movable bearing seat.
As a further improvement of the technical scheme, the two ends of the main eccentric shaft are respectively provided with a main eccentric block, and the two ends of the auxiliary eccentric shaft are respectively provided with an auxiliary eccentric block.
On the other hand, a vibration feeder is also provided, and the vibration excitation mechanism is applied.
On the other hand, still provide a mine feeding equipment, applied with above-mentioned vibrating feeder.
The utility model has the following beneficial effects: the two ends of a main eccentric shaft of the excitation mechanism are respectively penetrated through a bearing of a fixed bearing seat of a first thrust plate assembly and a bearing of a fixed bearing seat of a second thrust plate assembly, the two ends of a secondary eccentric shaft are respectively penetrated through a bearing of a movable bearing seat of the first thrust plate assembly and a bearing of a movable bearing seat of the second thrust plate assembly, a main gear is meshed with a secondary gear at a preset initial position of the movable bearing seat, when a vibration direction angle needs to be adjusted, the movable bearing seat is moved away from the fixed bearing seat through a thrust device to enable the secondary gear to be disengaged from the main gear, the angular position of a main eccentric block can be changed by rotating the main eccentric shaft through a motor of a driving assembly, the relative angular position of the main eccentric block and the secondary eccentric block is changed, so that the vibration direction angle is changed, and after adjustment is completed, the secondary gear and the main gear are meshed again through the movable bearing seat of the thrust device, and therefore the adjustment of the vibration direction angle of the excitation mechanism is completed; the adjusting operation is simple and quick, the labor intensity is greatly reduced, and the operation efficiency is improved.
In addition to the objects, features and advantages described above, the present utility model has other objects, features and advantages. The utility model will be described in further detail with reference to the accompanying drawings.
Drawings
The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model. In the drawings:
FIG. 1 is a schematic view of the construction of a preferred embodiment of the present utility model;
FIG. 2 is a cross-sectional view of a preferred embodiment of the present utility model;
FIG. 3 is an enlarged view of a portion of FIG. 2;
FIG. 4 is a schematic view of a first thrust plate assembly of a preferred embodiment of the present utility model;
1. the first thrust plate assembly 2, the second thrust plate assembly 3, the driving assembly 4, the triangular belt 5, the main eccentric shaft 6, the auxiliary eccentric shaft 7, the main gear 8, the arc dial 9, the auxiliary gear 10, the auxiliary eccentric block 11, the belt pulley 12, the bearing 13, the oil baffle disc 14, the framework sealing ring 15, the end cover 16, the spacer 17, the plate body 18, the fixed bearing seat 19, the main eccentric block 20, the electro-hydraulic push rod 21, the movable bearing seat 22, the second lug plate 23, the first lug plate 24 and the scale.
Detailed Description
It should be noted that, in the case of no conflict, the embodiments and features in the embodiments may be combined with each other. The utility model will be described in detail below with reference to the drawings in connection with embodiments.
Referring to fig. 1 to 4, a preferred embodiment of the present utility model provides an excitation mechanism applied to a vibratory feeder, comprising:
the first thrust plate assembly 1 comprises a plate body 17, a fixed bearing seat 18 arranged on the plate body 17, a movable bearing seat 21 arranged on the plate body 17 and a thrust device arranged on the movable bearing seat 21, wherein the thrust device is used for pushing the movable bearing seat 21 to move away from or close to the fixed bearing seat 18; the movable bearing seat 21 is connected to the plate body 17 through a sliding rail;
the second thrust plate assembly 2 has the same structure as the first thrust plate assembly 1 and is symmetrically distributed with the first thrust plate mechanism;
the main eccentric assembly comprises a main eccentric shaft 5 penetrating through the fixed bearing seat 18 and a main gear 7 arranged on the main eccentric shaft 5;
the auxiliary eccentric assembly comprises an auxiliary eccentric shaft 6 penetrating through the movable bearing seat 21 and an auxiliary gear 9 arranged on the auxiliary eccentric shaft 6, wherein the auxiliary gear 9 is used for being meshed with the main gear 7;
the driving assembly 3 is used for driving the main eccentric shaft 5 to rotate when the thrust device drives the movable bearing seat 21 to be far away from the fixed bearing seat 18 and the auxiliary gear 9 to be disengaged from the main gear 7 so as to change the angular position of the main eccentric block 19 and further change the vibration direction angle; and is also used for driving the main eccentric shaft 5 to rotate and simultaneously driving the auxiliary eccentric shaft 6 to rotate when the auxiliary gear 9 is meshed with the main gear 7 so as to drive the main eccentric block 19 and the auxiliary eccentric block 10 to rotate to generate vibration.
Wherein, a plurality of vibrators of the excitation mechanism are respectively arranged on the main eccentric shaft 5 and the auxiliary eccentric shaft 6; the thrust device is preferably an electro-hydraulic push rod 20, the fixed end of the electro-hydraulic push rod 20 is fixedly connected with the fixed bearing seat 18, the piston end of the electro-hydraulic push rod 20 is fixedly connected with the movable bearing seat 21, and the electro-hydraulic push rod 20 can control the movement and the positioning of the movable bearing seat 21; the driving assembly 3 comprises a motor which is in driving connection with the main eccentric assembly through a transmission piece;
it can be understood that the two ends of the main eccentric shaft 5 of the excitation mechanism are respectively arranged on the bearing of the fixed bearing seat 18 of the first thrust plate assembly 1 and the bearing of the fixed bearing seat 18 of the second thrust plate assembly 2 in a penetrating way, the two ends of the auxiliary eccentric shaft 6 are respectively arranged on the bearing of the movable bearing seat 21 of the first thrust plate assembly 1 and the bearing of the movable bearing seat 21 of the second thrust plate assembly 2 in a penetrating way, the main gear 7 is meshed with the auxiliary gear 9 at the preset initial position of the movable bearing seat 21, when the vibration direction angle needs to be adjusted, the movable bearing seat 21 is moved away from the fixed bearing seat 18 by the thrust device, so that the auxiliary gear 9 is disengaged from the main gear 7, and the motor of the driving assembly 3 can be driven to rotate the main eccentric shaft 5 to change the angular position of the main eccentric block 19, thereby changing the relative angular position of the main eccentric block 19 and the auxiliary eccentric block 10, and after the adjustment, the auxiliary gear 9 and the main gear 7 are meshed again by the movable bearing seat 21 moved back by the thrust device, so that the adjustment of the vibration direction angle of the excitation mechanism is completed; the adjusting operation is simple and quick, the labor intensity is greatly reduced, and the operation efficiency is improved.
In this embodiment, the plate 17 is provided with a marking component for marking the offset distance of the movable bearing seat 21 relative to the meshing position of the main gear 7 and the auxiliary gear 9, that is, when the electro-hydraulic push rod 20 pushes the movable bearing seat 21 to move away from the movable bearing seat 21 before adjusting the vibration direction angle, whether the main gear 7 is meshed with or out of meshing with the auxiliary gear 9 is judged according to the offset distance marked by the marking component, so as to rotate the main eccentric shaft 5 to adjust the angular position of the main eccentric block 19 or reset after adjustment; the accuracy in the operation process is improved, and equipment faults caused by improper operation are reduced;
specifically, the marking assembly includes a scale 24 fixedly arranged on the plate body 17 and a first ear plate 23 slidingly connected to the plate body 17 along the action direction of the thrust device, the first ear plate 23 is fixedly connected with the movable bearing seat 21 so as to move along with the movable bearing seat 21, a pointer facing the scale of the scale 24 is arranged on the first ear plate 23, that is, the first ear plate 23 moves along with the movable bearing seat 21, and meanwhile, the pointer moves along with the first ear plate 23, and the moving distance of the relative meshing position of the pointer is obtained according to the position of the pointer relative to the scale of the scale 24;
further, the identification assembly further comprises a second lug plate 22 arranged in parallel with the first lug plate 23, the second lug plate 22 is slidably connected to the plate body 17 and fixedly connected with the movable bearing seat 21, and the movement direction of the movable bearing seat 21 is further limited by arranging the first lug plate 23 and the second lug plate 22, so that the electro-hydraulic push rod 20 is prevented from being deformed by radial force to deviate the movement path.
In this embodiment, the end of the main eccentric shaft 5 is provided with the arc dial 8, and the pointer of the arc dial 8 is used for synchronously rotating when changing the angular position of the main gear 7 along with the rotation of the main eccentric shaft 5, that is, judging the current rotation angle of the main eccentric shaft 5 according to the offset angle of the pointer of the arc dial 8 during adjustment, so as to obtain the adjustment of the vibration direction angle, and improve the accuracy of angle adjustment.
In this embodiment, the main gear 7 is disposed at the first end of the main eccentric shaft 5, and the auxiliary gear 9 is disposed at the first end of the auxiliary eccentric shaft 6; the second end of the main eccentric shaft 5 is provided with a belt pulley 11, the driving assembly 3 comprises a motor, and the motor is in driving connection with the belt pulley 11 at the second end of the main eccentric shaft 5 through a triangular belt 4 so as to drive the main eccentric shaft 5 to rotate, and the main eccentric shaft 5 rotates and is driven to drive the auxiliary eccentric shaft 6 to rotate through two meshed gears; the main eccentric shaft 5 is mounted on a fixed bearing seat 18 through a bearing 12, and an oil baffle disc 13, a framework sealing ring 14, an end cover 15 and a spacer bush 16 are mounted on the fixed bearing seat 18 of the two plate bodies 17, and the sealing structure of the movable bearing seat 21 is the same as that of the fixed bearing seat 18.
On the other hand, the embodiment also provides a vibration feeder, which is provided with the excitation mechanism.
On the other hand, this embodiment still provides a mine feeding equipment, has applied above-mentioned vibrating feeder.
The above description is only of the preferred embodiments of the present utility model and is not intended to limit the present utility model, but various modifications and variations can be made to the present utility model by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.

Claims (10)

1. An excitation mechanism for a vibratory feeder, comprising:
the first thrust plate assembly (1) comprises a plate body (17), a fixed bearing seat (18) arranged on the plate body (17), a movable bearing seat (21) arranged on the plate body (17) and a thrust device arranged on the movable bearing seat (21), wherein the thrust device is used for pushing the movable bearing seat (21) to move away from or close to the fixed bearing seat (18);
the second thrust plate assembly (2) has the same structure as the first thrust plate assembly (1) and is symmetrically distributed with the first thrust plate assembly (1);
the main eccentric assembly comprises a main eccentric shaft (5) penetrating through the fixed bearing seat (18), a main gear (7) arranged on the main eccentric shaft (5) and a main eccentric block (19) arranged on the main eccentric shaft (5);
the auxiliary eccentric assembly comprises an auxiliary eccentric shaft (6) penetrating through the movable bearing seat (21), an auxiliary gear (9) arranged on the auxiliary eccentric shaft (6) and an auxiliary eccentric block (10) arranged on the auxiliary eccentric shaft (6), wherein the auxiliary gear (9) is used for being meshed with the main gear (7);
the driving assembly (3) is used for driving the main eccentric shaft (5) to rotate when the thrust device drives the movable bearing seat (21) to be far away from the fixed bearing seat (18) and the auxiliary gear (9) to be disengaged from the main gear (7), so that the angular position of the main eccentric block (19) is changed, and the vibration direction angle is changed; and the auxiliary eccentric shaft is also used for driving the main eccentric shaft (5) to rotate and driving the auxiliary eccentric shaft (6) to rotate when the auxiliary gear (9) is meshed with the main gear (7) so as to drive the main eccentric block (19) and the auxiliary eccentric block (10) to rotate, thereby generating vibration.
2. Excitation mechanism according to claim 1, characterized in that the plate (17) is provided with an identification assembly for identifying the distance of the movable bearing block (21) relative to the meshing position offset of the main gear (7) and the secondary gear (9).
3. Excitation mechanism according to claim 2, characterized in that the identification assembly comprises a scale (24) fixedly arranged on the plate body (17) and a first lug plate (23) slidingly connected to the plate body (17) along the action direction of the thrust device, the first lug plate (23) being fixedly connected with the movable bearing seat (21) so as to move along with the movable bearing seat (21), and a pointer facing the scale of the scale (24) being arranged on the first lug plate (23).
4. A vibration exciting mechanism according to claim 3, wherein said marking assembly further comprises a second lug plate (22) arranged in parallel with said first lug plate (23), said second lug plate (22) being slidably connected to said plate body (17) and fixedly connected to said movable bearing seat (21).
5. Excitation mechanism according to claim 1, characterized in that the end of the main eccentric shaft (5) is provided with an arcuate dial (8), the pointer of the arcuate dial (8) being adapted to rotate synchronously as the main eccentric shaft (5) rotates to change the angular position of the main gear (7).
6. Excitation mechanism according to claim 1, characterized in that the main gear (7) is arranged at the first end of the main eccentric shaft (5), and the secondary gear (9) is arranged at the first end of the secondary eccentric shaft (6); the second end of the main eccentric shaft (5) is provided with a belt wheel (11), and the driving assembly (3) comprises a motor which is in driving connection with the belt wheel (11) at the second end of the main eccentric shaft (5) through a V-belt (4).
7. Excitation mechanism according to any of claims 1-6, characterized in that the thrust device is an electro-hydraulic push rod (20), a fixed end of the electro-hydraulic push rod (20) is fixedly connected with the fixed bearing seat (18), and a piston end of the electro-hydraulic push rod (20) is fixedly connected with the movable bearing seat (21).
8. Excitation mechanism according to any of claims 1-6, characterized in that the main eccentric shafts (5) are provided with main eccentric blocks (19) at both ends, respectively, and the auxiliary eccentric shafts (6) are provided with auxiliary eccentric blocks (10) at both ends, respectively.
9. A vibratory feeder employing the excitation mechanism of any of claims 1-8.
10. A mine feeding apparatus, characterized in that the vibratory feeder of claim 9 is applied.
CN202321482033.5U 2023-06-12 2023-06-12 Excitation mechanism, vibrating feeder and mine feeding equipment Active CN220663832U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202321482033.5U CN220663832U (en) 2023-06-12 2023-06-12 Excitation mechanism, vibrating feeder and mine feeding equipment

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202321482033.5U CN220663832U (en) 2023-06-12 2023-06-12 Excitation mechanism, vibrating feeder and mine feeding equipment

Publications (1)

Publication Number Publication Date
CN220663832U true CN220663832U (en) 2024-03-26

Family

ID=90353664

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202321482033.5U Active CN220663832U (en) 2023-06-12 2023-06-12 Excitation mechanism, vibrating feeder and mine feeding equipment

Country Status (1)

Country Link
CN (1) CN220663832U (en)

Similar Documents

Publication Publication Date Title
CN201325737Y (en) Belt feeder
CN101091948B (en) Three stars vibration exciter in dual frequency
CN101597881A (en) The road roller exciter apparatus that a kind of amplitude is adjustable
CN220663832U (en) Excitation mechanism, vibrating feeder and mine feeding equipment
CN106702862A (en) Automatic vibration and oscillation switching mechanism and vibration and oscillation road roller
CN109939917B (en) Double-shaft inertia vibration exciter
CN201040278Y (en) Three-shaft box type vibrator elliptical vibrating screen
CN209174312U (en) It is online to accelerate variable force vibration excitor
CN210048000U (en) Chain tensioning device of scraper reclaimer
CN211160668U (en) Triaxial excitation device for vibrating screen
CN109622178B (en) Double-machine self-synchronous driving balanced type vibration crusher
CN215429206U (en) Eccentric oscillating structure and building regenerated material crushing device
CN205188769U (en) Vibration vibration tripper and vibration road roller
CN211389290U (en) Vibration device for brick making machine
CN112495514B (en) Industrial solid waste comprehensive treatment system and treatment method
CN205269758U (en) Gyratory breaker
CN104399660A (en) Online magnetic variation force vibration exciter
CN201217772Y (en) Amplitude-adjustable vibration generator apparatus of pavement roller
CN2544836Y (en) Large cylinder vibrating screen with double vibrators
CN212739502U (en) Linear vibration feeder
CN205927745U (en) But amplitude modulation's bolt towards device
CN109174598A (en) It is online to accelerate variable force vibration excitor
CN109356587B (en) Engineering machine for taking stone
CN202317211U (en) Milling device for machining inner arcs
CN108620304B (en) Slide belt type online variable force vibration exciter

Legal Events

Date Code Title Description
GR01 Patent grant
GR01 Patent grant