A multi-stable eccentric block with online adjustment of exciting force

Abstract

The present invention provides a multi-stable exciting force online adjustment eccentric block, which belongs to the technical field of eccentric blocks. The interior of the eccentric block body of the eccentric block is divided into three fan-shaped spaces, each of which is provided with a counterweight, two electromagnets, two permanent magnets, a power supply and a spring. One side of the counterweight is connected to the spring, and the other end of the spring is fixed at the center position of the outer circular arc of the space sector. An electromagnet and a permanent magnet are respectively installed on both sides of the center position of the outer circular arc of the sector. Another electromagnet and a permanent magnet are installed relative to the electromagnet and permanent magnet at the inner circular arc of the space sector and the center position of the outer circular arc of the sector; a limit block is installed between the electromagnet and the permanent magnet at the inner circular arc of the space sector. The eccentric block can realize real-time adjustment of the eccentricity, is stable, and can be flexibly applied to the screening of various materials.

Description

Technical Field

[0001] The present invention relates to the technical field of eccentric blocks, and in particular to a multi-stable exciting force online regulating eccentric block. Background Art

[0002] Most existing screening machines on the market are manufactured according to specific specifications. Once finalized, they only have one optimal screening efficiency point, making them incapable of adapting to flexible adjustments to production parameters (once the machine is turned on, output and materials suitable for screening cannot be adjusted, resulting in a relatively simple function). This significantly deviates from the market demand for "multi-functional" and "multi-purpose" machines, resulting in energy waste (they do not operate at optimal conditions) and poor economic efficiency. Currently, a small number of eccentric blocks can adjust the eccentricity, such as in Reference 1 (Lu Jinhong. An eccentric block for a vibrating hammer [P]. Jiangsu Province: CN217580140U, 2022-10-14). However, the adjustment process requires manual operation, resulting in low efficiency and certain risks. Furthermore, the adjustable gears are limited. Therefore, if the exciting force can be adjusted in real time, it will be a disruptive technology in the field of vibrating screens, enabling flexible adjustment of the motion of the screen machine, improving the production efficiency of the screen machine, and generating significant economic benefits.

[0003] The existing eccentric blocks for vibrating screens are single, and the main problems are: 1. The eccentric blocks for the original vibrating screen can only be adjusted manually each time, which greatly reduces work efficiency; 2. Since the number of eccentric blocks for the original vibrating screen needs to be changed to change the exciting force, the number of eccentric blocks is generally more than two, which is extremely inconvenient to set. Summary of the Invention

[0004] The present invention provides a multi-stable exciting force online adjustment eccentric block, which can realize real-time adjustment of eccentric distance, is stable, and can be flexibly applied to the screening of various materials.

[0005] In order to solve the above-mentioned purpose of the invention, the technical solution provided by the present invention is as follows:

[0006] A multi-stable exciting force online adjustment eccentric block comprises an eccentric block body, a magnetic counterweight, a spring, an electromagnet, a permanent magnet and a power supply for the electromagnet;

[0007] The interior of the eccentric block is divided into three fan-shaped spaces, each of which contains a counterweight, two electromagnets, two permanent magnets, a power supply and a spring.

[0008] One side of the counterweight is connected to a spring, the other end of the spring is fixed to the center of the outer arc of the space sector, an electromagnet and a permanent magnet are respectively installed on both sides of the center of the outer arc of the sector, and another electromagnet and a permanent magnet are installed at the inner arc of the space sector and opposite to the electromagnet and permanent magnet at the center of the outer arc of the sector;

[0009] A limiting block is installed between the electromagnet and the permanent magnet at the inner arc of the spatial sector.

[0010] The power supply is installed on the side close to the electromagnet.

[0011] The height of the limit block determines the proximal limit distance of the counterweight block.

[0012] The maximum compression position of the spring determines the telecentric limit distance of the counterweight.

[0013] The counterweight block is used to adjust the exciting force of the eccentric block;

[0014] The spring is used to convert centrifugal potential energy into elastic potential energy and store it;

[0015] The electromagnet is used to adjust the position of the counterweight;

[0016] Permanent magnets are used to keep the counterweights in place and not susceptible to interference;

[0017] The power supply is used to power the electromagnet.

[0018] In the fan-shaped space, the N poles and S poles of the two permanent magnets are opposite to each other.

[0019] In the sector-shaped space, the two electromagnets have opposite magnetic poles after being energized, and the electromagnets and the permanent magnets at opposite positions have the same magnetic poles.

[0020] The magnetic pole on one side of the counterweight connecting spring is the same as the magnetic pole of the electromagnet at the center position of the fan-shaped outer arc.

[0021] The adjustment method of the eccentric block is specifically as follows:

[0022] A reverse current is supplied to the electromagnet at the end where the counterweight is located through a wireless power supply, causing the electromagnet to have a repulsive force on the counterweight. When the counterweight is subjected to the force, it breaks the equilibrium state and moves to the other end at a constant speed, thereby adjusting the eccentricity.

[0023] The eccentricity is divided into four gears, among which:

[0024] The first gear is the initial state, the electromagnet is not energized, and the three counterweights are all at the proximal limit position;

[0025] In the second gear, a reverse current is applied to the electromagnet in the middle sector space, breaking the balance between the centrifugal force and the spring force. The counterweight in the middle sector space moves to the telecentric limit position, while the other two counterweights remain in their initial state.

[0026] In the third gear, the electromagnets in the middle sector space and the left sector space are supplied with reverse current, and the counterweights in the middle sector space and the left sector space move to the telecentric limit position. At this time, the counterweight in the right sector space remains in its initial state.

[0027] In the fourth gear, reverse current is applied to the electromagnets in the three sector spaces, and the three counterweights are moved to the telecentric limit position.

[0028] The eccentricity adjustment amount of the second gear is 4.5%-5.0% (generally about 4.7%); the eccentricity adjustment amount of the third gear is 6.5%-7.0% (generally about 6.8%); the eccentricity adjustment amount of the fourth gear is 9.0%-9.5% (generally about 9.4%).

[0029] Compared with the prior art, the above technical solution has at least the following beneficial effects:

[0030] The above scheme can adapt to materials of various densities and different materials. At the same time, the eccentric distance of the eccentric block can be adjusted during the screening process to adapt to different production conditions, thereby improving production efficiency, reducing time waste caused by manual adjustment of the eccentric block, and reducing production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0032] Figure 1 This is a schematic diagram of the structure of an eccentric block for online adjustment of the multi-stable exciting force according to the present invention;

[0033] Figure 2 This is a three-dimensional schematic diagram of the interior of the eccentric block for online adjustment of the multi-stable exciting force of the present invention;

[0034] Figure 3 This is a schematic diagram of the internal space structure of the eccentric block for online adjustment of the multi-stable exciting force of the present invention;

[0035] Figure 4 This is a three-dimensional schematic diagram of the appearance of the multi-stable exciting force online adjustment eccentric block of the present invention;

[0036] Figure 5This is a working diagram of the multi-stable exciting force online adjustment eccentric block of the present invention;

[0037] Figure 6 This is a working gear diagram of the multi-stable exciting force online adjustment eccentric block of the present invention, wherein (a) is the first gear, (b) is the second gear, (c) is the third gear, and (d) is the fourth gear;

[0038] Figure 7 This is a schematic diagram of the connection between the eccentric block power supply and the electromagnet for online adjustment of the multi-stable exciting force of the present invention;

[0039] Figure 8 This is a simplified circuit diagram of the eccentric block power supply and electromagnet for online adjustment of the multi-stable exciting force of the present invention.

[0040] The accompanying drawings are described as follows:

[0041] 1-Counterweight A; 2-Counterweight B; 3-Counterweight C; 4-Electromagnet A; 5-Electromagnet B; 6-Electromagnet C; 7-Electromagnet D; 8-Electromagnet E; 9-Electromagnet F; 10-Power supply A; 11-Power supply B; 12-Power supply C; 13-Spring A; 14-Spring B; 15-Spring C; 16-Permanent magnet A; 17-Permanent magnet B; 18-Permanent magnet C; 19-Permanent magnet D; 20-Permanent magnet E; 21-Permanent magnet F. DETAILED DESCRIPTION

[0042] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the described embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0043] Unless otherwise defined, technical or scientific terms used in this disclosure shall have the ordinary meanings understood by persons of ordinary skill in the art to which this disclosure pertains. It should be noted that the terms "upper," "lower," "left," "right," "front," and "back" used in this disclosure are intended solely to indicate relative positional relationships. When the absolute position of the object being described changes, the relative positional relationship may also change accordingly.

[0044] The invention provides a multi-stable exciting force online regulating eccentric block.

[0045] The eccentric block includes an eccentric block body, a magnetic counterweight, a spring, an electromagnet, a permanent magnet and a power supply for the electromagnet;

[0046] The interior of the eccentric block is divided into three fan-shaped spaces, each of which contains a counterweight, two electromagnets, two permanent magnets, a power supply and a spring.

[0047] like Figure 1 In the left sector-shaped space, one side of the counterweight A1 is connected to the spring A13, and the other end of the spring A13 is fixed at the center of the outer arc of the space sector. An electromagnet A4 and a permanent magnet A16 are installed on both sides of the center of the outer arc of the sector. Another electromagnet B5 and a permanent magnet B17 are installed at the inner arc of the space sector and opposite to the electromagnet A4 and the permanent magnet A16 at the center of the outer arc of the sector; the power supply A10 is installed on the side close to the electromagnet.

[0048] In the middle fan-shaped space, one side of the counterweight B2 is connected to the spring B14, and the other end of the spring B14 is fixed at the center of the outer arc of the space sector. An electromagnet C6 and a permanent magnet C18 are installed on both sides of the center of the outer arc of the sector. Another electromagnet D7 and a permanent magnet D19 are installed at the inner arc of the space sector and opposite to the electromagnet C6 and permanent magnet C18 at the center of the outer arc of the sector; the power supply B11 is installed on the side close to the electromagnet.

[0049] In the fan-shaped space on the right, one side of the counterweight C3 is connected to the spring C15, and the other end of the spring C15 is fixed at the center of the outer arc of the space sector. An electromagnet E8 and a permanent magnet E20 are installed on both sides of the center of the outer arc of the sector. Another electromagnet F9 and a permanent magnet F21 are installed at the inner arc of the space sector and opposite to the electromagnet E8 and permanent magnet E20 at the center of the outer arc of the sector; the power supply C12 is installed on the side close to the electromagnet.

[0050] A limit block is installed between the electromagnet and the permanent magnet at the inner arc of the space sector.

[0051] The height of the limit block determines the proximal limit distance of the counterweight block.

[0052] The maximum compression position of the spring determines the telecentric limit distance of the counterweight.

[0053] The counterweight block is used to adjust the exciting force of the eccentric block;

[0054] The spring is used to convert centrifugal potential energy into elastic potential energy and store it;

[0055] The electromagnet is used to adjust the position of the counterweight;

[0056] Permanent magnets are used to keep the counterweights in place and not susceptible to interference;

[0057] The power supply is used to power the electromagnet.

[0058] In the fan-shaped space, the N poles and S poles of the two permanent magnets are opposite to each other.

[0059] In the sector-shaped space, the two electromagnets have opposite magnetic poles after being energized, and the electromagnets and the permanent magnets at opposite positions have the same magnetic poles.

[0060] The magnetic pole on one side of the counterweight connecting spring is the same as the magnetic pole of the electromagnet at the center position of the fan-shaped outer arc.

[0061] like Figure 2 The internal three-dimensional schematic diagram of the present invention shows that compared with the traditional eccentric block, the present invention divides the interior of the eccentric block into three spaces. This structure can accommodate multiple counterweights in a smaller space, thereby achieving more and a wider range of eccentric distance adjustments.

[0062] like Figure 3 The figure shows a schematic diagram of the internal three-part spatial structure of the present invention. With this structure, multiple counterweights can be installed to achieve more and a wider range of eccentricity adjustments.

[0063] like Figure 4 The figure shows a three-dimensional schematic diagram of the appearance of the present invention. The appearance of the present invention is no different from that of a traditional eccentric block.

[0064] like Figure 5 As shown in FIG, the adjustment method of the eccentric block is as follows:

[0065] A reverse current is supplied to the electromagnet at the end where the counterweight is located through a wireless power supply, causing the electromagnet to have a repulsive force on the counterweight. When the counterweight is subjected to the force, it breaks the equilibrium state and moves to the other end at a constant speed, thereby adjusting the eccentricity.

[0066] like Figure 6 , the eccentricity is divided into four gears, among which:

[0067] The first gear is the initial state, the electromagnet is not energized, and the three counterweights are all at the proximal limit position;

[0068] In the second gear, a reverse current is applied to the electromagnet in the middle sector space, breaking the balance between the centrifugal force and the spring force. The counterweight in the middle sector space moves to the telecentric limit position, while the other two counterweights remain in their initial state.

[0069] In the third gear, the electromagnets in the middle sector space and the left sector space are supplied with reverse current, and the counterweights in the middle sector space and the left sector space move to the telecentric limit position. At this time, the counterweight in the right sector space remains in its initial state.

[0070] In the fourth gear, reverse current is applied to the electromagnets in the three sector spaces, and the three counterweights are moved to the telecentric limit position.

[0071] The eccentricity adjustment amount of the second gear is about 4.7%; the eccentricity adjustment amount of the third gear is about 6.8%; and the eccentricity adjustment amount of the fourth gear is about 9.4%.

[0072] like Figure 7 The diagram shows the wiring diagram of the eccentric block power supply and electromagnet for online excitation force adjustment. The N and S poles of the electromagnet are determined by changing the direction of the current by connecting the power supply in the forward or reverse direction. The internal power supply cable is encapsulated using solid-state adhesive to prevent movement during rotation, improving reliability.

[0073] like Figure 8 Shown is a simplified circuit diagram of the eccentric block power supply and electromagnet for online adjustment of the exciting force according to the present invention.

[0074] The following is an explanation of the specific implementation process.

[0075] First, a wireless battery is used to briefly apply a current to the electromagnet at the counterweight end, creating a short-term repulsive force on the electromagnet. This force disrupts the equilibrium state and causes the counterweight to move to the other end, thereby adjusting the eccentricity. To adjust to the first position (initial state), no further action is required; all three counterweights are located at the bottom. To adjust to the second position, a reverse current is applied to electromagnet D7, disrupting the balance between centrifugal force and spring force. Counterweight B2 moves to the top, while counterweights A1 and C3 remain in their original positions. At this point, the eccentricity adjustment is approximately 4.7% relative to the initial position. Adjust to the third gear, pass reverse current to electromagnet B5 and electromagnet D7, counterweight A1 and counterweight B2 move to the upper end, and the position of counterweight C3 remains unchanged. At this time, the eccentricity adjustment amount is about 6.8%; adjust to the fourth gear, pass reverse current to electromagnet B5, electromagnet D7 and electromagnet F9, counterweight A1, counterweight B2 and counterweight C3 all move to the upper end, and the eccentricity adjustment amount is about 9.4%.

[0076] There are a few points to note:

[0077] (1) The drawings of the embodiments of the present invention only relate to the structures related to the embodiments of the present invention. Other structures may refer to conventional designs.

[0078] (2) For the sake of clarity, the thickness of layers or regions in the drawings used to describe the embodiments of the present invention are exaggerated or reduced, that is, these drawings are not drawn to scale. It is understood that when an element such as a layer, film, region, or substrate is referred to as being "on" or "under" another element, the element may be "directly" "on" or "under" the other element or intervening elements may be present.

[0079] (3) In the absence of conflict, the embodiments of the present invention and the features therein may be combined with each other to form new embodiments.

[0080] The above are only specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. The protection scope of the present invention shall be based on the protection scope of the claims.

Claims

1. A multi-stable exciting force online adjustment eccentric block, characterized in that: It includes an eccentric block body, a magnetic counterweight, a spring, an electromagnet, a permanent magnet and a power supply for the electromagnet; The interior of the eccentric block is divided into three fan-shaped spaces, each of which contains a counterweight, two electromagnets, two permanent magnets, a power supply and a spring. One side of the counterweight is connected to a spring, the other end of the spring is fixed to the center of the outer arc of the space sector, an electromagnet and a permanent magnet are respectively installed on both sides of the center of the outer arc of the sector, and another electromagnet and a permanent magnet are installed at the inner arc of the space sector and opposite to the electromagnet and permanent magnet at the center of the outer arc of the sector; A limit block is installed between the electromagnet and the permanent magnet at the inner arc of the spatial sector; In the fan-shaped space, the N poles and S poles of the two permanent magnets are opposite to each other; In the fan-shaped space, the two electromagnets have opposite magnetic poles after being energized, and the electromagnets and the permanent magnets at opposite positions have the same magnetic poles; The magnetic pole on one side of the counterweight connecting spring is the same as the magnetic pole of the electromagnet at the center position of the fan-shaped outer arc.

2. The multi-stable exciting force online adjustment eccentric block according to claim 1 is characterized in that: The power supply is installed on the side close to the electromagnet.

3. The multi-stable exciting force online adjustment eccentric block according to claim 1 is characterized in that: The height of the limit block determines the proximal limit distance of the counterweight block.

4. The multi-stable exciting force online adjustment eccentric block according to claim 1 is characterized in that: The maximum compression position of the spring determines the telecentric limit distance of the counterweight.

5. The multi-stable exciting force online adjustment eccentric block according to claim 1, characterized in that: The adjustment method of the eccentric block is specifically as follows: A reverse current is supplied to the electromagnet at the end where the counterweight is located through a wireless power supply, causing the electromagnet to have a repulsive force on the counterweight. When the counterweight is subjected to the force, it breaks the equilibrium state and moves to the other end at a constant speed, thereby adjusting the eccentricity.

6. The multi-stable exciting force online adjustment eccentric block according to claim 5, characterized in that: The eccentricity is divided into four gears, among which: The first gear is the initial state, the electromagnet is not energized, and the three counterweights are all at the proximal limit position; In the second gear, a reverse current is applied to the electromagnet in the middle sector space, breaking the balance between the centrifugal force and the spring force. The counterweight in the middle sector space moves to the telecentric limit position, while the other two counterweights remain in their initial state. In the third gear, the electromagnets in the middle sector space and the left sector space are supplied with reverse current, and the counterweights in the middle sector space and the left sector space move to the telecentric limit position. At this time, the counterweight in the right sector space remains in its initial state. In the fourth gear, reverse current is applied to the electromagnets in the three sector spaces, and the three counterweights are moved to the telecentric limit position.

7. The multi-stable exciting force online adjustment eccentric block according to claim 6, characterized in that: The eccentricity adjustment amount of the second gear is 4.5%-5.0%; the eccentricity adjustment amount of the third gear is 6.5%-7.0%; and the eccentricity adjustment amount of the fourth gear is 9.0%-9.5%.

Images