Amplitude-adjustable linear vibration screening device

Abstract

The utility model provides an amplitude-adjustable linear vibration screening device. The amplitude-adjustable linear vibration screening device comprises a power input module, a connecting rod mechanism and a vibration screen, the power input module drives the vibrating screen to do reciprocating motion in the horizontal direction through the connecting rod mechanism; the connecting rod mechanism comprises a crank, a first rocker and a second rocker, one end of the crank is driven by the power input module to rotate, and the other end of the crank is rotationally matched with the rear end of the second rocker. The front end of the second rocker is connected with the rear end of the first rocker, and the connecting position is adjustable, so that the overall length of the first rocker and the second rocker is adjustable; and the front end of the first rocker is in running fit with a screen mesh of the vibrating screen. The amplitude-adjustable linear vibration screening device has the advantages of being adjustable in amplitude and adjustable in screening efficiency.

Description

Technical Field

[0001] This utility model relates to the field of vibrating screening technology, specifically to an amplitude-adjustable linear vibrating screening device. Background Technology

[0002] Linear vibrating screen systems are widely used in the field of material screening, and their screening results can be applied to material structure detection, etc. Existing literature research shows that the material screening efficiency is greatly affected by the amplitude of the screen movement. Adjusting the amplitude is an effective way to improve screening efficiency. This adjustment method can significantly improve the distribution and flow of materials on the screen, promote finer stratification and screening, and thus meet various complex screening needs.

[0003] Existing amplitude regulation technologies primarily focus on adjusting structural parameters and dynamic characteristics. By modifying structural parameters, such as adjusting the screen support structure or vibration transmission components (e.g., link length), differentiated control of amplitude at different positions on the screen can be achieved, thereby optimizing the material accumulation state on the screen. For example, the Chinese dissertation "Research on Anti-clogging Screening Process with Variable Amplitude under Different Feeding Modes" explored a strategy of flexibly changing the amplitude at various points on the screen surface by adjusting link parameters. However, this case is still limited to the preset fixed state of structural and amplitude parameters, and cannot autonomously adjust the amplitude. In terms of dynamic characteristic regulation, several innovative solutions have emerged in recent years, aiming to achieve online stepless adjustment of amplitude. For example, the nonlinear vibration relaxation screen amplitude online stepless adjustment device shown in Chinese patent CN114273219B achieves flexible amplitude control by integrating a stepless adjustable damper device; while CN105855160B proposes a high-frequency screen and method for automatically adjusting amplitude. This method affects the dynamic response of the vibration system by adjusting the current intensity, thereby controlling the amplitude. While these techniques demonstrate flexibility in amplitude adjustment, they are highly dependent on accurate dynamic models, and their effectiveness is directly limited by the accuracy of modeling and the precision of real-time control.

[0004] Designing a mechanism to flexibly adjust the amplitude of vibration, thereby significantly improving material screening efficiency, is a pressing and important technical challenge. To address this problem, researchers and engineers are continuously exploring and experimenting, aiming to find a technical solution that is both efficient and reliable. Utility Model Content

[0005] The purpose of this invention is to address the shortcomings of existing technologies by providing an amplitude-adjustable linear vibrating screen device with adjustable amplitude and screening efficiency.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is: an amplitude-adjustable linear vibrating screen device, comprising a power input module, a linkage mechanism, and a vibrating screen;

[0007] The power input module drives the vibrating screen to perform reciprocating motion in the horizontal direction through a linkage mechanism;

[0008] The linkage mechanism includes a crank, a first rocker arm, and a second rocker arm. One end of the crank is driven to rotate by a power input module, and the other end is rotatably engaged with the rear end of the second rocker arm. The front end of the second rocker arm is connected to the rear end of the first rocker arm, and the connection position is adjustable so that the overall length of the first and second rockers is adjustable. The front end of the first rocker arm is rotatably engaged with the screen of the vibrating screen.

[0009] Based on the above, the rear end of the first rocker or the front end of the second rocker is provided with a plurality of mounting holes arranged along the length direction, and the corresponding front end of the second rocker or the rear end of the first rocker is provided with through holes and / or threaded holes. The first rocker and the second rocker are connected by the cooperation of set screws, mounting holes, and through holes and / or threaded holes.

[0010] Based on the above, the front end of the second rocker arm is in the form of a double fork arm, and the rear end of the first rocker arm is nested inside the insert arm of the second rocker arm.

[0011] Based on the above, the upper end of the mounting hole is chamfered, and the set screw is provided with a corresponding chamfered deformed part, and the deformed part of the set screw fits into the chamfer at the upper end of the mounting hole.

[0012] Based on the above, the rear end of the first rocker and the front end of the second rocker slide together along the length direction, and set screws are provided on the first rocker and the second rocker at the vertical ends of the sliding direction to provide preload from the side for locking the first rocker and the second rocker.

[0013] Based on the above, the power input module includes a motor, a crossed roller bearing, and a base. The motor is fixed on the base, the bracket of the crossed roller bearing is mounted on the base, and the inner and outer ends of the crossed roller bearing are axially positioned by an inner pressure plate and an outer pressure plate, respectively.

[0014] One end of the crank is connected to the output shaft of the motor and is rotatably supported on the bracket by the crossed roller bearing.

[0015] Based on the above, the vibrating screen includes a screen mesh, a guide rail mechanism, and a support frame. The screen mesh is mounted on the support frame via the guide rail mechanism, and the screen mesh performs linear reciprocating motion along the guide rail mechanism.

[0016] Based on the above, the length of the first joystick is greater than the length of the second joystick.

[0017] This utility model has substantial features and progress compared to the prior art. Specifically, this utility model decomposes the crank-connecting rod mechanism of the traditional vibrating screen, mainly focusing on the connecting rod mechanism. The original fixed-length integrated connecting rod structure is replaced with a two-section spliced ​​structure. The total length of the connecting rod mechanism is adjustable by splicing the two sections. Adjusting the total length of the connecting rod mechanism changes the amplitude, which can then be changed according to the needs of vibrating screening, ultimately improving screening efficiency. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of the adjustable linear vibrating screen device of this utility model.

[0019] Figure 2 This is an exploded structural diagram of the core transmission part of the adjustable linear vibrating screen device of this utility model.

[0020] Figure 3 This is a cross-sectional view of the core transmission part of the adjustable linear vibrating screen device of this utility model.

[0021] Figure 4 This is an exploded structural diagram of the drive module of the adjustable linear vibrating screen device in this utility model.

[0022] Figure 5 This is a schematic diagram of the maximum displacement of the screen in the adjustable linear vibrating screen device of this utility model.

[0023] Figure 6 This is a schematic diagram of the minimum displacement of the screen in the adjustable linear vibrating screen device of this utility model.

[0024] In the diagram: 1. Power input module; 2. Linkage mechanism; 3. Vibrating screen; 4. Platform;

[0025] 11. Motor; 12. Bracket; 13. Inner pressure plate; 14. Crossed roller bearing; 15. Outer pressure plate;

[0026] 21. Crank; 22. First rocker arm; 23. Second rocker arm; 24. Set screw; 25. Through hole for the first rocker arm;

[0027] 31. Screen; 32. Guide rail mechanism; 33. Support frame. Detailed Implementation

[0028] The technical solution of this utility model will be further described in detail below through specific embodiments.

[0029] like Figures 1-4 As shown, an amplitude-adjustable linear vibrating screen device includes a power input module 1, a linkage mechanism 2, and a vibrating screen 3.

[0030] The power input module 1 drives the vibrating screen 3 to perform reciprocating motion in the horizontal direction through the linkage mechanism 2.

[0031] Specifically, in this embodiment, the power input module 1 includes a motor 11, a crossed roller bearing 14, and a base 4. The motor 11 is fixed on the base 4, and the bracket 12 of the crossed roller bearing 14 is mounted on the base 4. The inner end and the outer end of the crossed roller bearing 14 are axially positioned by an inner pressure plate 13 and an outer pressure plate 15, respectively.

[0032] The linkage mechanism 2 includes a crank 21, a first rocker arm 22, and a second rocker arm 23. One end of the crank 21 is connected to the output shaft of the motor 11 and is rotatably supported on the bracket 12 through the crossed roller bearing 14. The length of the first rocker arm 22 is greater than the length of the second rocker arm 23.

[0033] The other end of the crank 21 is rotatably coupled to the rear end of the second rocker arm 23 via a bearing.

[0034] The front end of the second rocker 23 is connected to the rear end of the first rocker 22 and the connection position is adjustable so that the overall length of the first rocker 22 and the second rocker 23 is adjustable.

[0035] Specifically, in this embodiment, the rear end of the first rocker 22 or the front end of the second rocker 23 is provided with a plurality of mounting holes 25 arranged along the length direction. Correspondingly, the front end of the second rocker 23 or the rear end of the first rocker 22 is provided with through holes and / or threaded holes. The first rocker 22 and the second rocker 23 are connected by the cooperation of the set screw 24, the mounting holes 25 and the through holes and / or threaded holes.

[0036] To ensure connection stability, the front end of the second rocker 23 is in the form of a double fork arm, and the rear end of the first rocker 22 is nested inside the insert arm of the second rocker 23.

[0037] The upper end of the mounting hole 25 is chamfered, and the set screw 24 is provided with a corresponding chamfered deformed part. The deformed part of the set screw 24 fits into the chamfer at the upper end of the mounting hole 25. After installation, due to the constraint of the chamfered part, the first rocker arm 22 and the second rocker arm 23 are in close contact, thereby avoiding relative sliding between the first rocker arm 22 and the second rocker arm 23.

[0038] The front end of the first rocker arm 22 is rotated with the screen 31 of the vibrating screen 3 through a bearing. Specifically, in this embodiment, the vibrating screen 3 includes a screen 31, a guide rail mechanism 32 and a support frame 33. The screen 31 is mounted on the support frame 33 through the guide rail mechanism 32. The screen 31 moves linearly back and forth along the guide rail mechanism 32. The support frame 33 is mounted on the base 4 and is on the same platform as the power input module 1.

[0039] In other embodiments, the rear end of the first rocker and the front end of the second rocker slide against each other along the length direction, and set screws are provided on the first rocker and the second rocker at the vertical ends of the sliding direction to provide preload from the side for locking the first rocker and the second rocker.

[0040] Technical principle analysis:

[0041] exist Figure 5 and Figure 6 middle, Indicates the length of the first joystick. The length of the second rocker arm is indicated by h, the distance between the screen and the center of the power input module is indicated by x. rmax Indicates the maximum limit position of the sieve, x rmin Indicates the minimum limit position of the sieve. This indicates the rotation angle of the motor.

[0042] Formula for calculating amplitude:

[0043]

[0044] Differentiating the amplitude with respect to the length of the first rocker arm yields the following:

[0045]

[0046] It can be seen that the denominator of the derivative is positive and the numerator is negative; therefore,

[0047]

[0048] It can be seen that the amplitude is inversely proportional to the length of the first rocker arm; as the length of the first rocker arm increases, the amplitude decreases.

[0049] Based on this principle, the position of the first rocker arm through-hole can be parametrically designed to achieve the desired amplitude. Specifically, in this solution, by adjusting the position of the first rocker arm through-hole intersecting with the set screw, the effective length of the first rocker arm is changed, thereby adjusting the overall effective length of the rocker arm and thus adjusting the screen amplitude. The position of the first rocker arm through-hole can be obtained through calculation of the desired amplitude. Based on the desired amplitude, the connection position of the first rocker arm through-hole is adjusted, and the effective length is also adjusted, thereby ensuring that the amplitude adjustment result is within an acceptable range.

[0050] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and not to limit it; although the utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications can still be made to the specific implementation of this utility model or equivalent substitutions can be made to some technical features without departing from the spirit of the technical solution of this utility model, and all such modifications and substitutions should be covered within the scope of the technical solution claimed by this utility model.

Claims

1. An amplitude-adjustable linear vibrating screen device, characterized in that: Includes a power input module, linkage mechanism, and vibrating screen; The power input module drives the vibrating screen to perform reciprocating motion in the horizontal direction through a linkage mechanism; The linkage mechanism includes a crank, a first rocker arm, and a second rocker arm. One end of the crank is driven to rotate by a power input module, and the other end is rotatably engaged with the rear end of the second rocker arm. The front end of the second rocker arm is connected to the rear end of the first rocker arm, and the connection position is adjustable so that the overall length of the first and second rockers is adjustable. The front end of the first rocker arm is rotatably engaged with the screen of the vibrating screen.

2. The amplitude-adjustable linear vibrating screen device according to claim 1, characterized in that: The first rocker arm has a plurality of mounting holes arranged along its length at its rear end or the second rocker arm has a corresponding through hole and / or threaded hole at its front end or the first rocker arm. The first rocker arm and the second rocker arm are connected by the cooperation of the set screw, the mounting holes, and the through hole and / or threaded hole.

3. The amplitude-adjustable linear vibrating screen device according to claim 2, characterized in that: The front end of the second rocker arm is in the form of a double fork arm, and the rear end of the first rocker arm is nested inside the insert arm of the second rocker arm.

4. The amplitude-adjustable linear vibrating screen device according to claim 2 or 3, characterized in that: The upper end of the mounting hole is chamfered, and the set screw is provided with a corresponding chamfered deformed part, which fits into the chamfer at the upper end of the mounting hole.

5. The amplitude-adjustable linear vibrating screen device according to claim 1, characterized in that: The rear end of the first rocker and the front end of the second rocker slide against each other along the length direction. Set screws are provided on the first rocker and the second rocker at the vertical ends of the sliding direction to provide preload from the side for locking the first rocker and the second rocker.

6. The amplitude-adjustable linear vibrating screen device according to claim 4, characterized in that: The power input module includes a motor, a crossed roller bearing, and a base. The motor is fixed on the base, the bracket of the crossed roller bearing is mounted on the base, and the inner and outer ends of the crossed roller bearing are axially positioned by an inner pressure plate and an outer pressure plate, respectively. One end of the crank is connected to the output shaft of the motor and is rotatably supported on the bracket by the crossed roller bearing.

7. The amplitude-adjustable linear vibrating screen device according to claim 6, characterized in that: The vibrating screen includes a screen mesh, a guide rail mechanism, and a support frame. The screen mesh is mounted on the support frame via the guide rail mechanism, and the screen mesh performs linear reciprocating motion along the guide rail mechanism.

8. The amplitude-adjustable linear vibrating screen device according to claim 7, characterized in that: The length of the first joystick is greater than the length of the second joystick.

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