Self-adaptive eccentric screening device

Abstract

The utility model provides a self-adaptive eccentric screening device. The self-adaptive eccentric screening device comprises a driving motor, a base, a first eccentric piece and a second eccentric piece. The driving motor is provided with an output shaft capable of rotating forwards and backwards. The base is connected with an output shaft of the driving motor; the first eccentric sheet is fixed on the base; the second eccentric sheet is rotationally connected to an output shaft of the driving motor, and a wind resistance sheet is arranged on the second eccentric sheet; when the driving motor rotates in the first direction, the first eccentric piece is in contact connection with the second eccentric piece under the inertia effect to form an eccentric balancing weight. When the driving motor rotates in the second direction, the second eccentric piece is separated from the first eccentric piece under the action of centrifugal force and wind resistance and located on the two symmetrical sides, and the first direction is opposite to the second direction. According to the self-adaptive eccentric screening device, by automatically changing the position of the balance weight in the self-adaptive eccentric screening device, automatic switching of the self-adaptive eccentric screening device between the screening state and the discharging state is achieved, and the automation degree is improved.

Description

Technical Field

[0001] This application relates to the field of material screening technology, and in particular to an adaptive eccentric screening device. Background Technology

[0002] Vibrating screens are primarily based on the principles of vibration dynamics. A motor drives an eccentric weight to rotate, generating centrifugal force that causes the material within the screen to jump, thus achieving material screening. However, in some technologies, switching between screening and discharge processes requires operators to shut down the vibrating screen and manually adjust the eccentric position of the eccentric weight. This process is cumbersome, has a low degree of automation, and impacts operational efficiency. Utility Model Content

[0003] In view of this, this application provides an adaptive eccentric screening device to improve the problem that the adaptive eccentric screening device cannot automatically switch between the screening and discharge processes.

[0004] The technical solution adopted in this application to solve the above-mentioned technical problems is as follows:

[0005] Embodiments of this application provide an adaptive eccentric screening device, comprising:

[0006] The drive motor has a reversible output shaft;

[0007] The base is connected to the output shaft of the drive motor;

[0008] The first eccentric piece is fixed on the base;

[0009] The second eccentric plate is rotatably connected to the output shaft of the drive motor, and the second eccentric plate is provided with a wind resistance plate;

[0010] When the drive motor rotates in the first direction, the first eccentric piece contacts and connects with the second eccentric piece under the action of inertia to form an eccentric counterweight; when the drive motor rotates in the second direction, the second eccentric piece separates from the first eccentric piece under the action of centrifugal force and wind resistance and is located on both sides of the symmetrical axis, with the first direction and the second direction being opposite.

[0011] In some embodiments of this application, the first eccentric piece is provided with a first magnetic element along the first direction toward the side of the second eccentric piece, and the second eccentric piece is provided with a second magnetic element along the second direction toward the side of the first eccentric piece, wherein the magnetism of the first magnetic element is opposite to that of the second magnetic element.

[0012] In some embodiments of this application, the output shaft of the drive motor is fitted with a bearing, and the second eccentric piece is fixedly connected to the bearing.

[0013] In some embodiments of this application, the base is provided with a limiting block, and when the adaptive eccentric screening device is in the screening state, the second eccentric piece abuts against the limiting block.

[0014] In some embodiments of this application, the first direction is clockwise, the second direction is counterclockwise, and the limiting block is disposed between the first eccentric piece and the second eccentric piece, with the limiting block located on the side of the second eccentric piece facing the clockwise direction.

[0015] In some embodiments of this application, the second eccentric piece is provided with an anti-collision block, and when the adaptive eccentric screening device is in the screening state, the anti-collision block abuts against the limiting block.

[0016] In some embodiments of this application, both the first eccentric piece and the second eccentric piece are fan-shaped, and the angle range of the central angle of the first eccentric piece and the second eccentric piece is 20° to 50°. The rotation angle range of the first eccentric piece and the rotation angle range of the second eccentric piece are both 0° to 135°.

[0017] In some embodiments of this application, when the adaptive eccentric screening device is in the screening state, the first eccentric piece and the second eccentric piece are symmetrically arranged with the central axis of the base as the axis of symmetry.

[0018] In some embodiments of this application, the base is provided with a plurality of weight-reducing holes arranged in an array along the first direction.

[0019] In some embodiments of this application, a material screening and discharge assembly is also included for screening and discharging materials. The output shaft of the drive motor is a two-ended output shaft, with one end of the output shaft extending into the material screening and discharge assembly and connected to an eccentric pendulum, and the other end connected to the base.

[0020] Specifically, when the drive motor rotates along the first direction, the adaptive eccentric screening device is in the discharge state, and when the drive motor rotates along the second direction, the adaptive eccentric screening device is in the screening state.

[0021] In summary, the adaptive eccentric screening device provided in this application improves automation and thus operational efficiency by automatically switching between screening and discharge states by changing the position of the counterweight. Specifically, by fixing the first eccentric piece to the base, which is connected to the output shaft of the drive motor, the output shaft of the drive motor can drive the base to rotate, thereby causing the first eccentric piece to rotate. Furthermore, by rotatably connecting the second eccentric piece to the output shaft of the drive motor, a difference in angular velocity exists between the second and first eccentric pieces. When the base rotates in the first direction, the first eccentric piece moves towards the second eccentric piece under inertia until they connect to form an eccentric counterweight. The eccentric movement of the counterweight enables the discharge function of the adaptive eccentric screening device. When the base rotates in a second direction opposite to the first direction, the first eccentric piece will move away from the second eccentric piece due to inertia, and the second eccentric piece will move away from the first eccentric piece due to the action of the wind resistance plate. This causes the first and second eccentric pieces to separate and move away from each other, thus disassembling the eccentric counterweight and changing the counterweight ratio on the base, thereby realizing the screening function of the adaptive eccentric screening device. Attached Figure Description

[0022] Figure 1 A schematic diagram of the structure of an adaptive eccentric screening device provided for an embodiment of this application;

[0023] Figure 2 A schematic diagram showing the positions of two eccentric plates in a screening state in an adaptive eccentric screening device provided for an embodiment of this application;

[0024] Figure 3 for Figure 2 A cross-sectional schematic diagram;

[0025] Figure 4 A schematic diagram showing the positions of two eccentric plates in the discharge state of an adaptive eccentric screening device provided for an embodiment of this application;

[0026] Figure 5 This is a schematic diagram of the structure of the second eccentric piece provided in an embodiment of this application.

[0027] Explanation of reference numerals in the attached figures:

[0028] 100. Material screening and discharge assembly; 110. Upper housing; 111. First discharge arm; 120. Lower housing; 121. Second discharge arm; 130. Screen; 200. Drive motor; 300. Adaptive eccentric screening device; 310. Base; 311. Limiting block; 312. Weight reduction hole; 320. First eccentric plate; 321. First magnetic component; 330. Second eccentric plate; 331. Wind resistance plate; 332. Anti-collision block; 333. Second magnetic component; 400. Eccentric pendulum; 500. Protective shell. Detailed Implementation

[0029] The technical solutions in the embodiments of this application will now be described with reference to the accompanying drawings.

[0030] In the description of this application, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or specifying the number of technical features indicated. Therefore, features defined with "first" and "second" may explicitly or implicitly include one or more features. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0031] This application uses specific terms to describe embodiments of the application. Terms such as "an embodiment," "one embodiment," and / or "some embodiments" refer to a particular feature, structure, or characteristic associated with at least one embodiment of the application. Therefore, it should be emphasized and noted that references to "an embodiment," "one embodiment," or "an alternative embodiment" in different locations throughout this specification do not necessarily refer to the same embodiment. Furthermore, certain features, structures, or characteristics in one or more embodiments of the application can be appropriately combined.

[0032] Please see Figure 1 The embodiments of this application provide an adaptive eccentric screening device, including a material screening and discharging assembly 100, a drive motor 200, an adaptive eccentric assembly, and a protective shell 500.

[0033] The material screening and discharge assembly 100 is used for screening and discharging materials. The assembly includes an upper housing 110, a lower housing 120, and a screen 130. The upper housing 110 and lower housing 120 are connected and overlapped. An inlet is provided at the top of the upper housing 110 for feeding materials. A first discharge arm 111 extends from one side of the upper housing 110 for discharging materials located within it. A second discharge arm extends from one side of the lower housing 120 for discharging materials located within it.

[0034] The drive motor 200 has an output shaft with outputs at both ends and can be a vertical motor. One end of the output shaft of the drive motor 200 extends into the material screening assembly 100, specifically into the lower housing 120, and is connected to an eccentric pendulum 400. The eccentric pendulum 400 abuts against the screen 130, so that the movement of the eccentric pendulum 400 can be transmitted to the screen 130, thereby driving the screen 130 to move to complete the screening and discharge of materials.

[0035] An adaptive eccentric component 300 is housed within a protective shell 500, which is connected to the lower shell 120. The adaptive eccentric component 300 is connected to the output shaft of the drive motor 200, away from the eccentric pendulum 400. The adaptive eccentric component 300 can adjust its eccentric position according to the direction of rotation of the drive motor 200's output shaft. Since the eccentric position of the eccentric pendulum 400 is fixed, different movements of the screen 130 can be achieved by unilaterally adjusting the eccentric position of the adaptive eccentric component 300. These movements include, but are not limited to, causing the screen 130 to vibrate and move the material towards the discharge arm or towards the interior of the upper and lower shells 120, thereby separating materials of different sizes. Multiple springs are installed between the lower shell 120 and the protective shell 500 to maintain a safe distance between the lower shell 120 and the protective shell 500 during eccentric movement of the adaptive eccentric component 300 and the pendulum. The elasticity of the springs also makes the movement of the screen 130 more stable. The adaptive eccentric component 300 can adjust the eccentric position according to the rotation direction of the vertical motor, so that the eccentric pendulum 400 and the adaptive eccentric component 300 can drive the screen 130 to vibrate in different directions according to the rotation direction of the vertical motor. This enables the adaptive eccentric screening device to automatically switch between screening and discharge states without the need for manual shutdown, thus improving work efficiency.

[0036] In some embodiments, see Figures 2 to 5 The adaptive eccentric component 300 includes a base 310, a first eccentric piece 320, and a second eccentric piece 330.

[0037] The base 310 is connected to the output shaft of the drive motor 200, which drives the base 310 to rotate. A first eccentric piece 320 is fixed to the base 310, allowing it to rotate with the base 310. A second eccentric piece 330 is rotatably connected to the output shaft of the drive motor 200, ensuring it does not rotate at the same angular velocity as the output shaft. This allows the first and second eccentric pieces 320 to have a difference in angular velocity when the output shaft of the drive motor 200 rotates, providing conditions for their subsequent engagement or disengagement. A wind resistance plate 331 is provided on the second eccentric piece 330, primarily used to provide rotational power and facilitate the separation of the two eccentric pieces.

[0038] Specifically, please see Figure 4 When the adaptive eccentric screening device is in the discharge state, the base 310 rotates along the first direction. The first eccentric piece 320 moves towards the second eccentric piece 330 under inertia. The first eccentric piece 320 moves until it connects with the second eccentric piece 330 to form an eccentric counterweight. At this time, due to the presence of the wind resistance plate 331, the two eccentric pieces are more tightly connected under the rotation in the first direction. At this time, the eccentric state of the adaptive eccentric component 300 and the position of the eccentric pendulum 400 are coordinated to rotate, so that the screen 130 vibrates outward, thereby realizing the discharge. How to set the positions of the upper and lower eccentric pendulums 400 in the adaptive eccentric screening device to achieve discharge is existing technology. The specific positional relationship between the eccentric pendulum 400 and the adaptive eccentric component 300 will not be elaborated here. It is clear that the position of the eccentric pendulum 400 is constant. By changing the position of the adaptive eccentric component 300, the vibration direction of the entire adaptive eccentric screening device can be adjusted. When the adaptive eccentric screening device is in screening mode, the base 310 rotates in the second direction, and the first eccentric piece 320 moves away from the second eccentric piece 330 under the action of inertia. The second eccentric piece 330 moves away from the first eccentric piece 320 under the wind resistance formed by the wind resistance plate 331, so that the first eccentric piece 320 and the second eccentric piece 330 separate and move in the direction away from each other. After the first eccentric piece 320 and the second eccentric piece 330 separate, the first eccentric piece 320 will be stationary relative to the base 310 due to the uniform rotation of the drive motor 200. The second eccentric piece 330 will continue to move away from the first eccentric piece 320 due to wind resistance and its own rotational inertia, until the inertia of the second eccentric piece 330 disappears and the resistance disappears as well. At this time, the two eccentric pieces reach a balanced state, and the counterweight position of the base 310 also changes accordingly, so that the adaptive eccentric screening device and the eccentric pendulum 400 switch to the arrangement state.

[0039] It should be noted that the first direction and the second direction are opposite directions of rotation. Specifically, the first direction is a clockwise rotation direction, and the second direction is a counterclockwise rotation direction. Of course, in other embodiments, the first direction can also be a counterclockwise rotation direction, and the second direction can be a clockwise rotation direction.

[0040] The technical solution provided in this application achieves automatic switching between screening and discharging states in an adaptive eccentric screening device by changing the position of the counterweight in the adaptive eccentric component 300, thereby improving automation and operational efficiency. Specifically, by fixing the first eccentric piece 320 to the base 310, which is connected to the output shaft of the drive motor 200, the output shaft of the drive motor 200 can drive the base 310 to rotate, which in turn drives the first eccentric piece 320 to rotate. Furthermore, by rotatably connecting the second eccentric piece 330 to the output shaft of the drive motor 200, a difference in angular velocity exists between the second eccentric piece 330 and the first eccentric piece 320. When the base 310 rotates in the first direction, the first eccentric piece 320 moves towards the second eccentric piece 330 under inertia until they connect to form an eccentric counterweight. The eccentric movement of the counterweight enables the discharging function of the adaptive eccentric screening device. When the base 310 rotates in a second direction opposite to the first direction, the first eccentric piece 320 will move away from the second eccentric piece 330 under the action of inertia. The second eccentric piece 330 will move away from the first eccentric piece 320 under the action of the wind resistance plate 331. This causes the first eccentric piece 320 and the second eccentric piece 330 to separate and move away from each other. The eccentric counterweight is disassembled, the counterweight ratio on the base 310 is changed, and the screening function of the adaptive eccentric screening device is realized.

[0041] In some embodiments, see Figure 2 , Figure 4 as well as Figure 5The first eccentric piece 320 has a first magnetic element 321 on its side facing the second eccentric piece 330 along a first direction, and the second eccentric piece 330 has a second magnetic element 333 on its side facing the first eccentric piece 320 along a second direction. The magnetic properties of the first magnetic element 321 and the second magnetic element 333 are opposite. In this embodiment, both the first magnetic element 321 and the second magnetic element 333 are ordinary magnets. In other embodiments, electromagnets or other magnetic objects can also be used. By providing magnetic elements with opposite magnetic properties on the two eccentric pieces, it is helpful to combine and fix the two eccentric pieces. Specifically, when the adaptive eccentric screening device is in the discharge state, the base 310 rotates along the first direction, and the first eccentric piece 320 moves toward the second eccentric piece 330 under the action of inertia. As the distance between the first eccentric piece 320 and the second eccentric piece 330 decreases, the magnetic effect between the first magnetic element 321 and the second magnetic element 333 increases, and finally the two eccentric pieces are attracted and connected together by the magnetic elements to form a stable eccentric counterweight block, thereby realizing the change of position of the two eccentric pieces and preventing the two eccentric pieces from separating in the discharge process.

[0042] In some embodiments, the output shaft of the drive motor 200 is fitted with a bearing, and the second eccentric piece 330 is fixedly connected to the bearing, thereby enabling the second eccentric piece 330 to be rotatably connected to the output shaft of the drive motor 200. This allows the second eccentric piece 330 to be fixed on the base 310 while remaining unaffected by the rotation of the output shaft of the drive motor 200, ensuring an angular velocity difference between the two eccentric pieces. The bearing can be a ball bearing.

[0043] In some embodiments, a limiting block 311 is provided on the base 310. See also... Figure 2When the adaptive eccentric screening device is in screening mode, the second eccentric piece 330 abuts against the limiting block 311 to prevent the second eccentric piece 330 from moving excessively or even colliding with the first eccentric piece 320. Furthermore, the first direction is clockwise and the second direction is counterclockwise. The limiting block 311 is located between the first eccentric piece 320 and the second eccentric piece 330, and is positioned on the side of the second eccentric piece 330 facing clockwise. This ensures that when the base 310 rotates clockwise, the second eccentric piece 330 will not be affected by the base 310 and will not move clockwise, thus ensuring that the first eccentric piece 320 and the second eccentric piece 330 can quickly adhere and connect. Additionally, when the base 310 rotates counterclockwise, it also prevents the second eccentric piece 330 from experiencing excessive wind resistance and centrifugal force, which could cause the second eccentric piece 330 to move too far and fail to maintain balance with the first eccentric piece 320. To ensure that the second eccentric piece 330 and the first eccentric piece 320 remain balanced when the base 310 rotates counterclockwise, the position of the limiting block 311 is preferably more than 135° away from the first eccentric piece 320 along the first direction, and as close as possible to 135°, so that when the second eccentric piece 330 abuts against the limiting block 311, the second eccentric piece 330 and the first eccentric piece 320 are symmetrically or approximately symmetrically arranged.

[0044] In some embodiments, the second eccentric piece 330 is provided with an anti-collision block 332. When the adaptive eccentric screening device is in the screening state, the anti-collision block 332 abuts against the limiting block 311 to avoid the second eccentric piece 330 directly colliding with the limiting block 311, which is beneficial to protecting the second eccentric piece 330.

[0045] In some embodiments, both the first eccentric piece 320 and the second eccentric piece 330 are fan-shaped, and the central angle of both the first eccentric piece 320 and the second eccentric piece 330 ranges from 20° to 50°. The rotation angle range of both the first eccentric piece 320 and the second eccentric piece 330 ranges from 0° to 135°. In this embodiment, the central angle between the first eccentric piece 320 and the second eccentric piece 330 is 45°. When the adaptive eccentric screening device is in screening mode, the first eccentric piece 320 and the second eccentric piece 330 are separated from each other, and at this time, the angle between the center line of the first eccentric piece 320 and the center line of the second eccentric piece 330 is 135°, that is, the first eccentric piece 320 and the second eccentric piece 330 are symmetrically arranged with the central axis of the base 310 as the axis of symmetry. When the adaptive eccentric screening device is in the discharge state, the first eccentric piece 320 and the second eccentric piece 330 are magnetically connected. At this time, the position angle of the first eccentric piece 320 relative to the limiting block 311 remains unchanged, while the position angle of the second eccentric piece 330 relative to the limiting block 311 rotates by 135°.

[0046] In some embodiments, the base 310 is provided with a plurality of weight-reducing holes 312 arranged in an array along the first direction, which helps to reduce the weight of the base 310, thereby reducing the load on the drive motor 200, while also ensuring that the base 310 itself is a mass-balanced structure and will not interfere with the polarization motion of the adaptive eccentric screening device.

[0047] In summary, the technical solution provided in this application utilizes inertia, magnetic attraction, and wind resistance to achieve adaptive adjustment of the positions of the two polarizers. By controlling the clockwise and counterclockwise rotation of the motor, the positions of the two polarizers are changed, thereby achieving automatic switching of the adaptive eccentric screening device's state. During this process, there is no need for manual adjustment of the position of the eccentric pendulum 400, nor is it necessary to stop the operation of the adaptive eccentric screening device, which helps to improve the smoothness and efficiency of the operation.

[0048] It should be noted that, in order to simplify the description of the embodiments of this application and thus aid in the understanding of one or more embodiments, the foregoing description of the embodiments of this application sometimes combines multiple features into a single embodiment, drawing, or description thereof. However, this method of description does not imply that the subject matter of this application requires more features than those mentioned in the claims. In fact, the embodiments have fewer features than all the features of the single embodiments disclosed above.

Claims

1. An adaptive eccentric screening device, characterized in that, include: The drive motor has a reversible output shaft; The base is connected to the output shaft of the drive motor; The first eccentric piece is fixed on the base; The second eccentric plate is rotatably connected to the output shaft of the drive motor, and the second eccentric plate is provided with a wind resistance plate; When the drive motor rotates in the first direction, the first eccentric piece contacts and connects with the second eccentric piece under the action of inertia to form an eccentric counterweight; when the drive motor rotates in the second direction, the second eccentric piece separates from the first eccentric piece under the action of centrifugal force and wind resistance and is located on both sides of the symmetrical axis, with the first direction and the second direction being opposite.

2. The adaptive eccentric screening device as described in claim 1, characterized in that, The first eccentric piece is provided with a first magnetic element on the side of the second eccentric piece along the first direction, and the second eccentric piece is provided with a second magnetic element on the side of the first eccentric piece along the second direction. The magnetism of the first magnetic element is opposite to that of the second magnetic element.

3. The adaptive eccentric screening device as described in claim 1, characterized in that, The output shaft of the drive motor is fitted with a bearing, and the second eccentric piece is fixedly connected to the bearing.

4. The adaptive eccentric screening device as described in claim 1, characterized in that, The base is provided with a limiting block. When the adaptive eccentric screening device is in screening state, the second eccentric piece abuts against the limiting block.

5. The adaptive eccentric screening device as described in claim 4, characterized in that, The first direction is clockwise, the second direction is counterclockwise, and the limiting block is located between the first eccentric piece and the second eccentric piece, with the limiting block situated on the side of the second eccentric piece facing the clockwise direction.

6. The adaptive eccentric screening device as described in claim 4, characterized in that, The second eccentric plate is provided with an anti-collision block. When the adaptive eccentric screening device is in the screening state, the anti-collision block abuts against the limiting block.

7. The adaptive eccentric screening device according to any one of claims 1 to 6, characterized in that, Both the first eccentric piece and the second eccentric piece are fan-shaped, and the angle range of the central angle of the first eccentric piece and the second eccentric piece is 20° to 50°. The rotation angle range of the first eccentric piece and the rotation angle range of the second eccentric piece are both 0° to 135°.

8. The adaptive eccentric screening device according to any one of claims 1 to 6, characterized in that, When the adaptive eccentric screening device is in screening mode, the first eccentric piece and the second eccentric piece are symmetrically arranged with the central axis of the base as the axis of symmetry.

9. The adaptive eccentric screening device as described in claim 1, characterized in that, The base has multiple weight-reduction holes arranged in an array along the first direction.

10. The adaptive eccentric screening device as described in claim 1, characterized in that, It also includes a material screening and discharge assembly for screening and discharging materials. The output shaft of the drive motor is a double-ended output shaft. One end of the output shaft extends into the material screening and discharge assembly and is connected to an eccentric pendulum, while the other end is connected to the base. Specifically, when the drive motor rotates along the first direction, the adaptive eccentric screening device is in the discharge state, and when the drive motor rotates along the second direction, the adaptive eccentric screening device is in the screening state.

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