An eccentric vibration amplitude adjusting device for a vibration table

Abstract

The utility model discloses an eccentric vibration amplitude adjusting device for vibration table relates to vibration table eccentric amplitude adjusting technical field, including the fixed frame, the one side of fixed frame is provided with the vibration motor, and the other side of fixed frame is provided with the adjusting assembly for adjusting amplitude, adjusting assembly includes with the fixed connection of fixed frame base, and the one end rotation is connected with eccentric seat of base away from fixed frame, and the slide is opened on the base, and the protruding end of eccentric seat is detachable connection through fastener and slide, all the through -hole is seted up on fixed frame, base and eccentric seat, and the eccentric sleeve of vibration motor inserts into the through -hole. The utility model discloses through fastener and adjusts the protruding end of eccentric seat to be in the position change of slide equivalent eccentric distance, can realize the adjustment of amplitude under the condition that the eccentric sleeve is not replaced and keeps vibration motor speed invariant.

Description

Technical Field

[0001] This utility model relates to the field of eccentric amplitude adjustment technology for vibration tables, and in particular to an eccentric vibration amplitude adjustment device for vibration tables. Background Technology

[0002] As an indispensable key piece of equipment in modern industrial production, the vibrating table works by using the centrifugal force generated by the rotation of an eccentric mass block to drive the table surface to vibrate periodically. This vibration mechanism is widely used in various industrial processes such as material conveying, screening, compaction, and testing. However, traditional vibrating tables face many technical bottlenecks in amplitude adjustment, which seriously restricts the improvement of production efficiency and process quality.

[0003] Traditional amplitude adjustment methods mainly include the following three technical solutions: 1. Eccentric Sleeve Replacement Adjustment Method: This method changes the amplitude by replacing eccentric sleeves with different eccentric masses. Although the principle is simple, it requires machine shutdown for disassembly and assembly, severely impacting production continuity. Especially on automated production lines, each replacement takes approximately 30-45 minutes and requires spare eccentric sleeves of various specifications, increasing equipment investment and warehousing costs.

[0004] 2. Motor speed regulation method: This method adjusts the speed of the vibratory motor via a frequency converter to change the amplitude. While this method allows for adjustment without stopping the machine, it has a serious technical flaw—the amplitude and vibration frequency are coupled and change. In actual processes, the vibration frequency often needs to be kept constant to ensure process stability, and speed regulation will disrupt this important parameter.

[0005] 3. Eccentric Sleeve Angle Adjustment Method: This method adjusts the amplitude by changing the relative angle between symmetrically arranged eccentric sleeves. Theoretically, this method can achieve adjustment without stopping the machine, but in practical applications, it suffers from low adjustment accuracy, complex structure, and easy loosening after long-term use. Especially under continuous vibration conditions, the adjustment mechanism is prone to displacement deviation, leading to unstable amplitude.

[0006] The common drawbacks of the above methods include low adjustment accuracy, slow response speed, poor mechanism reliability, and high maintenance costs. Especially in applications requiring high precision, such as laboratory vibration testing and precision sieving, traditional adjustment methods can no longer meet the vibration control accuracy requirements of modern industry.

[0007] Therefore, there is an urgent need for an eccentric vibration amplitude adjustment device for a vibration table that can adjust the amplitude without replacing the eccentric sleeve. Utility Model Content

[0008] The purpose of this invention is to provide an eccentric vibration amplitude adjustment device for a vibration table, so as to solve the problems existing in the prior art.

[0009] To achieve the above objectives, this utility model provides the following solution: This utility model provides an eccentric vibration amplitude adjustment device for a vibration table, including a fixed frame, a vibration motor is provided on one side of the fixed frame, and an adjustment component for adjusting the amplitude is provided on the other side of the fixed frame; the adjustment component includes a base fixedly connected to the fixed frame, an eccentric seat is rotatably connected to one end of the base away from the fixed frame, a slide rail is provided on the base, and the protruding end of the eccentric seat is detachably connected to the slide rail by fasteners; through holes are provided on the fixed frame, the base, and the eccentric seat, and the eccentric sleeve of the vibration motor extends into the through hole.

[0010] Preferably, a limiting plate is fixedly connected to one end of the base near the slide.

[0011] Preferably, the central axis of the through hole of the base and the central axis of the through hole of the fixing frame are on the same central axis.

[0012] Preferably, the central axis of the through hole of the base and the central axis of the through hole of the eccentric seat are not on the same central axis.

[0013] Preferably, the eccentric sleeve extends into the three through holes via multiple bearings.

[0014] Preferably, the bearings are provided in a one-to-one correspondence with the through holes.

[0015] Preferably, the central axis of the output shaft of the vibration motor and the central axis of the eccentric sleeve are not on the same central axis.

[0016] Preferably, the slide is arc-shaped.

[0017] Preferably, the fastener includes a bolt that passes sequentially through the slide rail and the protruding end of the eccentric seat.

[0018] Preferably, a nut is threaded onto one end of the bolt that passes through the protruding end of the eccentric seat.

[0019] The present invention discloses the following technical effects: This invention adjusts the equivalent eccentricity by changing the position of the protruding end of the eccentric seat in the slide rail using fasteners, thus enabling amplitude adjustment without replacing the eccentric sleeve or keeping the vibration motor speed constant. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the structure of this utility model when it is not assembled; Figure 3 This is a side view of the structure of this utility model; Figure 4 This is a schematic diagram of the base structure of this utility model; Figure 5 This is a schematic diagram of the structure of this utility model when it is installed on a vibration table; The components include: 1. Vibration motor; 2. Bearing; 3. Eccentric sleeve; 4. Fixing frame; 5. Base; 6. Eccentric seat; 7. Slide rail; 8. Bolt; 9. Nut; 10. Limiting plate; 11. Vibration table; 12. Support rod. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0024] Example 1 Reference Figures 1 to 5 This utility model discloses an eccentric vibration amplitude adjustment device for a vibration table, including a fixed frame 4, a vibration motor 1 disposed on one side of the fixed frame 4, and an adjustment component for adjusting the amplitude disposed on the other side of the fixed frame 4; the adjustment component includes a base 5 fixedly connected to the fixed frame 4, an eccentric seat 6 rotatably connected to the end of the base 5 opposite to the fixed frame 4, a slide rail 7 provided on the base 5, and a protruding end of the eccentric seat 6 detachably connected to the slide rail 7 by fasteners; through holes are provided on the fixed frame 4, the base 5, and the eccentric seat 6, and the eccentric sleeve 3 of the vibration motor 1 extends into the through hole. The fixed frame 4 is mounted on the vibration table 11.

[0025] Vibration motor 1 is a servo vibration motor.

[0026] This invention adjusts the equivalent eccentricity by adjusting the position of the protruding end of the eccentric seat 6 in the slide rail 7 using fasteners, thereby achieving amplitude adjustment without replacing the eccentric sleeve 3 and keeping the speed of the vibration motor 1 constant.

[0027] To further optimize the design, a limiting plate 10 is fixedly connected to one end of the base 5 near the slide 7. The limiting plate 10 is engaged with the support rod 12 of the vibration table 11 to prevent overall displacement.

[0028] The design is further optimized so that the central axis of the through hole in the base 5 and the central axis of the through hole in the fixing frame 4 are on the same central axis. This allows the eccentric sleeve 3 to rotate stably within the through holes in both the base 5 and the fixing frame 4, ensuring the stability of the eccentric sleeve 3's rotation.

[0029] In order to ensure that the central axis of the through hole of the base 5 and the central axis of the through hole of the fixing frame 4 are stably aligned on the same central axis, a first limiting ring is fixedly connected to one end of the base 5 facing the fixing frame 4. The first limiting ring extends into the through hole of the fixing frame 4, and the outer diameter of the first limiting ring is adapted to the inner diameter of the through hole of the fixing frame 4. By extending the first limiting ring into the through hole of the fixing frame 4, the central axis of the through hole of the base 5 and the central axis of the through hole of the fixing frame 4 are stably aligned on the same central axis.

[0030] In a further optimized design, the central axis of the through hole in base 5 and the central axis of the through hole in eccentric seat 6 are not on the same central axis. That is, the through hole on eccentric seat 6 is eccentrically located.

[0031] A second limiting ring is fixedly connected to one end of the eccentric seat 6 facing the base 5. The second limiting ring extends into the through hole of the base 5 and is rotatably connected to the through hole of the base 5. The outer diameter of the second limiting ring is adapted to the inner diameter of the through hole of the base 5. The eccentric seat 6 can rotate along the through hole of the base 5 through the second limiting ring, which is used to change the position of the central axis of the through hole of the eccentric seat 6.

[0032] In a further optimized design, the eccentric sleeve 3 extends into three through holes via multiple bearings 2. The use of multiple bearings 2 effectively reduces friction and improves concentricity, enabling the eccentric sleeve 3 to rotate stably.

[0033] The design was further optimized so that bearing 2 is set up in a one-to-one correspondence with the through hole. That is, there can be one bearing 2 in each through hole.

[0034] In a further optimized design, the central axis of the output shaft of the vibration motor 1 is not on the same central axis as the central axis of the eccentric sleeve 3. The vibration motor 1 obtains its excitation force by utilizing the centrifugal force generated by the high-speed rotation of the eccentric sleeve 3.

[0035] The design was further optimized by making the slide 7 arc-shaped. By adjusting the position of the protruding end of the eccentric seat 6 in the slide 7, the position of the central axis of the through hole of the eccentric seat 6 is changed; that is, the eccentric seat 6 can move along the arc trajectory, changing the angle between the eccentric direction and the vibration direction.

[0036] The design was further optimized, and the fasteners include bolts 8, which pass through the protruding ends of the slide rail 7 and the eccentric seat 6 in sequence.

[0037] The design was further optimized so that one end of the bolt 8, which passes through the protruding end of the eccentric seat 6, is threaded with a nut 9.

[0038] By tightening the nut 9 onto the bolt 8, the protruding end of the eccentric seat 6 will not move. When the nut 9 is loosened, it is easy to adjust the position of the central axis of the through hole of the eccentric seat 6.

[0039] This utility model adopts a locking mechanism of bolt 8 and nut 9 to avoid displacement deviation caused by long-term vibration, thus effectively improving the service life of the equipment.

[0040] The amplitude adjustment of this invention is accomplished solely through mechanical structural adjustments, while the speed of the vibration motor remains constant, ensuring the stability of the vibration frequency.

[0041] The fixing frame 4 is made of 30mm thick Q235B steel plate, which is CNC cut and then stress-relieved annealed.

[0042] The base 5 is made of 45 steel forgings, and the hardness is HB220-250 after quenching and tempering.

[0043] The eccentric seat 6 is made of ZG310-570 cast steel, which is normalized and then precision machined.

[0044] The slide has a radius of 7 arcs of 150mm, covering an adjustment range of ±30°.

[0045] Assembly process of this utility model: The mounting bracket 4 is fixed to the base of the vibration table 11 with M20×80 high-strength bolts, with a torque requirement of 280 N·m; the vibration motor 1 is a 5.5kW servo vibration motor, which is connected to the mounting bracket 4 through a flange, and the concentricity is adjusted to within 0.05mm; the eccentric sleeve 3 is made of 42CrMo material, which is heat-treated and then precision ground to a dimensional tolerance of h6 grade; the bearing 2 is an SKF6308 type, which is installed using a heat fitting method, with the interference controlled at 0.02-0.03mm; the clearance between the limit plate 10 and the support rod 12 is controlled at 0.2mm to ensure accurate positioning.

[0046] Working process: The eccentric sleeve 3 is driven to rotate by the vibration motor 1 to generate eccentric centrifugal force. This force is transmitted to the vibration fixing frame 4 through the eccentric sleeve 3, and the fixing frame 4 transmits the force to the vibration table 11, causing the vibration table 11 to vibrate. When the eccentric seat 6 is adjusted to be in the position of the slide 7, the effective component of the centrifugal force of the eccentric sleeve 3 changes accordingly by changing the position of the central axis of the through hole of the eccentric seat 6 (such as increasing / decreasing the eccentricity or adjusting the angle between the eccentric direction and the vibration direction of the table), thereby changing the vibration amplitude of the vibration table 11.

[0047] To ensure the balance and stability of amplitude adjustment, the vibration amplitude adjustment device of this invention is symmetrically arranged on both sides of the vibration table 11.

[0048] This invention is applicable to the modification of various standard vibration tables 11 without replacing core components, effectively reducing replacement costs.

[0049] Example 2 The vibration amplitude adjustment device of this utility model is applied to high-precision application scenarios: For laboratory vibration test benches, it is necessary to achieve micron-level adjustment of amplitude. In this embodiment, the curvature accuracy of slide 7 is improved to ±0.1°, and a scale is engraved on the base 5 near slide 7 along the curvature of slide 7. Each rotation corresponds to a change in amplitude of 0.05mm. At the same time, the eccentric seat 6 is made of 7075 aviation aluminum alloy to reduce weight and reduce the influence of inertia.

[0050] Example 3 For heavy equipment such as mining vibrating screens, amplitude adjustment must take into account impact resistance. In this embodiment, bolt 8 is upgraded to a 12.9 grade high-strength bolt, and anti-loosening washers are added to nut 9. The surface of slide 7 is carburized to make the hardness of the inner wall of slide 7 reach HRC60 or higher. Copper sleeves are embedded in the through holes of eccentric seat 6, base 5, and fixing frame 4 to avoid direct friction between the inner walls of the through holes of eccentric seat 6, base 5, and fixing frame 4 and bearing 2.

[0051] Example 4 Bearing 2 features a sealed design, which not only extends the lubrication cycle but also effectively reduces the maintenance frequency.

[0052] The vibration amplitude adjustment device of this invention is easy to modify for existing equipment.

[0053] This invention successfully solves the technical problem of amplitude adjustment in traditional vibration table 11 through the adjustment mechanism of eccentric seat and slide, and realizes efficient, accurate and stable amplitude control. After practical application verification in multiple industries, the vibration amplitude adjustment device of this invention has the characteristics of high adjustment accuracy, fast response speed, good reliability and wide applicability.

[0054] In the description of this utility model, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0055] The embodiments described above are merely preferred embodiments of the present utility model and are not intended to limit the scope of the present utility model. Various modifications and improvements made to the technical solutions of the present utility model by those skilled in the art without departing from the spirit of the present utility model should fall within the protection scope defined by the claims of the present utility model.

Claims

1. An eccentric vibration amplitude adjustment device for a vibration table, characterized in that: Includes a fixed frame (4), on one side of the fixed frame (4) is a vibration motor (1), and on the other side of the fixed frame (4) is an adjustment component for adjusting the amplitude; The adjustment assembly includes a base (5) fixedly connected to the fixed frame (4), an eccentric seat (6) rotatably connected to one end of the base (5) away from the fixed frame (4), a slide (7) is provided on the base (5), and the protruding end of the eccentric seat (6) is detachably connected to the slide (7) by fasteners. The fixing frame (4), the base (5) and the eccentric seat (6) are all provided with through holes, and the eccentric sleeve (3) of the vibration motor (1) extends into the through hole.

2. The eccentric vibration amplitude adjustment device for a vibration table according to claim 1, characterized in that: A limiting plate (10) is fixedly connected to one end of the base (5) near the slide (7).

3. The eccentric vibration amplitude adjustment device for a vibration table according to claim 1, characterized in that: The central axis of the through hole of the base (5) and the central axis of the through hole of the fixing frame (4) are on the same central axis.

4. The eccentric vibration amplitude adjustment device for a vibration table according to claim 1, characterized in that: The central axis of the through hole of the base (5) and the central axis of the through hole of the eccentric seat (6) are not on the same central axis.

5. The eccentric vibration amplitude adjustment device for a vibration table according to claim 1, characterized in that: The eccentric sleeve (3) extends into the three through holes through multiple bearings (2).

6. The eccentric vibration amplitude adjustment device for a vibration table according to claim 5, characterized in that: The bearing (2) is provided in a one-to-one correspondence with the through hole.

7. The eccentric vibration amplitude adjustment device for a vibration table according to claim 1, characterized in that: The central axis of the output shaft of the vibration motor (1) is not on the same central axis as the central axis of the eccentric sleeve (3).

8. The eccentric vibration amplitude adjustment device for a vibration table according to claim 1, characterized in that: The slide (7) is opened in an arc shape.

9. The eccentric vibration amplitude adjustment device for a vibration table according to claim 1, characterized in that: The fastener includes a bolt (8) that passes through the slide (7) and the protruding end of the eccentric seat (6) in sequence.

10. The eccentric vibration amplitude adjustment device for a vibration table according to claim 9, characterized in that: The bolt (8) is threaded to a nut (9) at one end of the protruding end of the eccentric seat (6).

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