Three-drive electric vibration exciter

Abstract

The utility model provides a three-drive electric vibration exciter, which comprises a magnetic circuit assembly and a moving coil assembly, the moving coil assembly is arranged in the magnetic circuit assembly, the moving coil assembly comprises a moving coil framework and n groups of driving coils wound on the moving coil framework, n is a positive integer greater than or equal to 2, and n is a positive integer greater than or equal to 2. The moving coil framework comprises a top panel and a center column which are connected up and down, the top panel and the center column are coaxially arranged, n + 1 apron boards are arranged in the axis direction of the center column, the apron board located at the top is connected with the top panel, the bottom face of the apron board located at the bottom is flush with the bottom face of the center column, and n + 1 apron boards are arranged in the axis direction of the center column. A net-shaped ring is arranged between every two adjacent apron boards, and a driving coil is wound on each net-shaped ring; the thrust of the vibration exciter is increased, the utilization efficiency of a magnetic field in the vibration exciter is improved, the strength and the rigidity of the moving coil framework are enhanced, the problem of high heat generated by multiple driving coils is solved, and meanwhile higher vertical vibration precision and smaller transverse vibration are achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of vibration test equipment, in particular to a three-drive electric vibrator. Background Art

[0002] An electric vibration table is a device that uses the principle of electromagnetic induction to generate vibrations. It simulates vibrations in the actual environment to test whether the product can withstand the vibrations during transportation or use during its life cycle. It is widely used in various vibration tests. The electric vibration table mainly includes a table body, an exciter, a support device, etc. Among them, an electric exciter is a type of exciter. It passes an alternating current into the moving coil, causing the coil to vibrate under the action of the electromagnetic excitation force in a given magnetic field. Electric exciters mostly use a single excitation single drive coil or a dual excitation single drive coil structure. In the case of size limitations, if you want to obtain a large thrust, you need to add a drive coil to provide power. Therefore, it is also necessary to design an exciter structure that is suitable for multiple drive coil working conditions. Summary of the Invention

[0003] The purpose of this utility model is to provide a three-drive electric vibrator to solve the above problems.

[0004] The technical solution adopted by this utility model is:

[0005] A three-drive electric vibrator includes a magnetic circuit assembly and a dynamic coil assembly, wherein the dynamic coil assembly is arranged in the magnetic circuit assembly, the dynamic coil assembly includes a dynamic coil frame and n groups of drive coils wound on the dynamic coil frame, n is a positive integer greater than or equal to 2, the dynamic coil frame includes a top panel and a center column connected upper and lower parts, the top panel and the center column are coaxially arranged, and n+1 skirt panels are arranged in the axial direction of the center column, the skirt panel located at the top is connected to the top panel, and the bottom surface of the skirt panel located at the bottom is flush with the bottom surface of the center column, a mesh ring is arranged between two adjacent skirt panels, and a drive coil is wound on each of the mesh rings.

[0006] As a further improved technical solution of the present invention, the outer ring diameter D1 of the mesh ring is smaller than the outer ring diameter D2 of the skirt plate.

[0007] As a further improved technical solution of the present invention, a number of upper ribs and a number of lower ribs are arranged on the central column, there are three groups of drive coils, and there are four skirt plates. The four skirt plates are respectively the first skirt plate, the second skirt plate, the third skirt plate and the fourth skirt plate from top to bottom. The upper ribs are evenly distributed circumferentially with the central column as the center, and the upper ribs connect the central column, the first skirt plate and the second skirt plate. The lower ribs are evenly distributed circumferentially with the central column as the center, and the lower ribs connect the central column, the third skirt plate and the fourth skirt plate.

[0008] As a further improved technical solution of the present invention, the magnetic circuit assembly includes a magnetizer, a first excitation coil, a second excitation coil and a center magnetic pole, the magnetizer includes a first pole plate, a first pole ring, a second pole plate, a second pole ring, a third pole plate and a bottom connecting plate arranged in sequence from top to bottom, the first pole plate, the first pole ring, the second pole plate, the second pole ring, the third pole plate and the bottom connecting plate have the same outer ring diameter D3, the first pole plate, the second pole plate and the third pole plate have the same inner ring diameter d1, the first pole ring and the second pole ring have the same inner ring diameter d2, d1 is smaller than d2, a first annular storage space is formed between the first pole plate, the first pole ring and the second pole plate, the first annular storage space is used to arrange the first excitation coil, a second annular storage space is formed between the second pole plate, the second pole ring and the third pole plate, the second annular storage space is used to arrange the second excitation coil, the center magnetic pole is arranged on the bottom connecting plate, and the moving coil frame is inserted in the annular space formed by the magnetizer and the center magnetic pole.

[0009] As a further improved technical solution of the present invention, a number of upper guide surfaces are provided on the outer side wall of the first skirt plate, a number of upper guide roller assemblies are provided on the first pole plate, and the upper guide roller assemblies cooperate with the upper guide surfaces; a number of lower guide surfaces are provided on the outer side wall of the fourth skirt plate, and a number of lower guide roller assemblies are provided on the third pole plate, and the lower guide roller assemblies cooperate with the lower guide surfaces.

[0010] As a further improved technical solution of the present invention, the upper guide surface corresponds to the upper rib plate one-to-one, and the lower guide surface corresponds to the lower rib plate one-to-one.

[0011] As a further improved technical solution of the present invention, the center magnetic pole includes an upper center magnetic pole, a middle center magnetic pole and a lower center magnetic pole arranged in sequence from top to bottom, the upper center magnetic pole is an equally divided annular structure, the lower center magnetic pole is an equally divided annular structure, and the middle center magnetic pole is an annular structure.

[0012] As a further improved technical solution of the present invention, in the axial position, the upper center magnetic pole corresponds to the first pole plate and the second pole ring, the middle center magnetic pole corresponds to the second pole plate, the center magnetic pole is located between the upper rib plate and the lower rib plate, and the lower center magnetic pole corresponds to the second pole ring and the third pole plate.

[0013] As a further improved technical solution of the present invention, a plurality of first ventilation holes are provided on the first electrode plate, the second electrode plate and the third electrode plate, and the plurality of first ventilation holes are evenly distributed circumferentially; a plurality of second ventilation holes are provided on the bottom connecting plate, and the plurality of second ventilation holes are evenly distributed circumferentially.

[0014] As a further improved technical solution of the present invention, an air suction hood covering the bottom connecting plate is provided at the lower part of the magnetic circuit assembly, and the air suction port of the air suction hood is connected to an external fan.

[0015] The beneficial effects of the utility model are:

[0016] Through the above structure, the three groups of drive coils greatly increase the thrust of the exciter and improve the utilization efficiency of the magnetic field inside the exciter. The dynamic coil frame adapted to the three groups of drive coils is set to enhance the strength and rigidity of the dynamic coil frame. The mesh ring solves the problem of high heat generated by multiple drive coils, and at the same time has higher vertical vibration accuracy and smaller lateral vibration. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the three-drive electric vibrator;

[0018] Figure 2 This is a schematic diagram of the internal structure of a three-drive electric vibrator;

[0019] Figure 3 It is a schematic diagram of the overall structure of the magnetic circuit assembly;

[0020] Figure 4 It is a schematic diagram of the internal structure of the magnetic circuit component;

[0021] Figure 5 It is a schematic diagram of the overall structure of the dynamic coil assembly;

[0022] Figure 6 It is a schematic diagram of the internal structure of the dynamic coil assembly;

[0023] Figure 7 It is a schematic diagram of the overall structure of the dynamic coil frame;

[0024] Figure 8 It is a schematic diagram of the internal structure of the dynamic coil frame.

[0025] Among them: 1-dynamic coil assembly, 11-dynamic coil frame, 111-top panel, 112-center column, 1131-first skirt board, 1132-second skirt board, 1133-third skirt board, 1134-fourth skirt board, 1141-first mesh ring, 1142-second mesh ring, 1143-third mesh ring, 1151-upper rib plate, 1152-lower rib plate, 1161-upper guide surface, 1162-lower guide surface, 12-first drive coil, 13-second drive coil, 14-first Three driving coils, 2-magnetic circuit assembly, 211-first pole plate, 212-first pole ring, 213-second pole plate, 214-second pole ring, 215-third pole plate, 216-bottom connecting plate, 22-first excitation coil, 23-second excitation coil, 24-center magnetic pole, 241-upper center magnetic pole, 242-middle center magnetic pole, 243-lower center magnetic pole, 25-first ventilation hole, 26-second ventilation hole, 3-upper guide roller assembly, 4-lower guide roller assembly, 5-air suction hood. DETAILED DESCRIPTION

[0026] The present invention will be described in detail below with reference to the specific embodiments shown in the accompanying drawings. However, these embodiments do not limit the present invention, and any structural, methodological, or functional modifications made by a person skilled in the art based on these embodiments are all within the scope of protection of the present invention.

[0027] If the present invention involves directions (e.g., up, down, left, right, front, back, outside, inside, etc.), the directions involved need to be defined, for example, "To clearly express the positions and directions described in this invention, the end closest to the operator is the proximal end, and the end away from the operator is the distal end." Or, the paper can be used as a reference for definition. Of course, if the subsequent description defines the positional relationship between the two by mutual reference, this definition does not need to be included here.

[0028] A three-drive electric vibrator, such as Figures 1 to 8As shown, the moving coil assembly 1 includes a magnetic circuit assembly 2 and a moving coil assembly 1. The moving coil assembly 1 is disposed within the magnetic circuit assembly 2. When powered, the moving coil assembly 1 can reciprocate under the drive of the magnetic circuit assembly 2. The magnetic circuit assembly 2 includes a magnetic conductor and two sets of excitation coils disposed within the magnetic conductor. The moving coil assembly 1 includes a moving coil frame 11 and n sets of drive coils wound around the moving coil frame 11, where n is a positive integer greater than or equal to 2. The moving coil frame 11 includes a top panel 111 and a center column 112 connected to each other. The top panel 111 and the center column 112 are coaxially arranged. n+1 skirt panels are disposed along the axis of the center column 112. The top skirt panel is connected to the top panel 111, while the bottom skirt panel is flush with the bottom of the center column 112. A mesh ring is disposed between adjacent skirt panels, and a drive coil is wound around each mesh ring. The mesh ring dissipates heat from the internal structure of the moving coil frame 11 and the drive coils, enhancing heat dissipation and improving heat dissipation efficiency. When direct current is supplied, the excitation coil forms a magnetic field, and when alternating current is supplied, the driving coil can drive the moving coil frame 11 to perform reciprocating motion.

[0029] As an embodiment of the present invention, the outer diameter D1 of the mesh ring is smaller than the outer diameter D2 of the skirt plate so as to provide space for the driving coil to be wound. Specifically, the mesh ring is a mesh hollow structure.

[0030] As an embodiment of the present invention, Figures 5 to 8 As shown, there are three groups of driving coils and four skirt plates, which are respectively the first skirt plate 1131, the second skirt plate 1132, the third skirt plate 1133 and the fourth skirt plate 1134 from top to bottom. The first skirt plate 1131, the second skirt plate 1132, the third skirt plate 1133, the fourth skirt plate 1134 and the top panel 111 are all coaxially arranged with the central column 112 as the axis. The first skirt plate 1131, the second skirt plate 1132, the third skirt plate 1133 and the fourth skirt plate 1134 are separated from each other and are arranged on the central column 112. There are several upper ribs 1151 and several lower ribs 1152, several of the upper ribs 1151 are evenly distributed circumferentially with the central column 112 as the center, several of the upper ribs 1151 extend axially, and the upper ribs 1151 connect the central column 112, the first skirt plate 1131 and the second skirt plate 1132, several of the lower ribs 1152 are evenly distributed circumferentially with the central column 112 as the center, several of the lower ribs 1152 extend axially, and the lower ribs 1152 connect the central column 112, the third skirt plate 1133 and the fourth skirt plate 1134.

[0031] As an embodiment of the present invention, there are four upper ribs 1151 and four lower ribs 1152.

[0032] As an embodiment of the present utility model, there are three mesh rings, namely, a first mesh ring 1141, a second mesh ring 1142 and a third mesh ring 1143. The first mesh ring 1141 is arranged between the first skirt board 1131 and the second skirt board 1132, and the first drive coil 12 is wound on the first mesh ring 1141. The second mesh ring 1142 is arranged between the second skirt board 1132 and the third skirt board 1133, and the second drive coil 13 is wound on the second mesh ring 1142. The third mesh ring 1143 is arranged between the third skirt board 1133 and the fourth skirt board 1134, and the third drive coil 14 is wound on the third mesh ring 1143.

[0033] An arc chamfer is provided at the connection between the upper rib plate 1151 and the first skirt plate 1131, an arc chamfer is provided at the connection between the upper rib plate 1151 and the first mesh ring 1141, an arc chamfer is provided at the connection between the upper rib plate 1151 and the second skirt plate 1132, an arc chamfer is provided at the connection between the lower rib plate 1152 and the third skirt plate 1133, an arc chamfer is provided at the connection between the lower rib plate 1152 and the second mesh ring 1142, and an arc chamfer is provided at the connection between the lower rib plate 1152 and the fourth skirt plate 1134. The above-mentioned arc chamfers are all used to enhance the connection strength and increase the stiffness of the dynamic coil frame 11, thereby increasing the resonance frequency of the dynamic coil assembly 1.

[0034] A plurality of upper guide surfaces 1161 are provided on the outer wall of the first skirt panel 1131. The upper guide surfaces 1161 extend axially and are evenly distributed circumferentially. A plurality of lower guide surfaces 1162 are provided on the outer wall of the fourth skirt panel 1134. The lower guide surfaces 1162 extend axially and are evenly distributed circumferentially. As one embodiment of the present invention, there are four upper guide surfaces 1161, and the number and position of the upper guide surfaces 1161 correspond one-to-one with the number and position of the upper ribs 1151. There are four lower guide surfaces 1162, and the number and position of the lower guide surfaces 1162 correspond one-to-one with the number and position of the lower ribs 1152.

[0035] like Figures 2-4As shown, the magnetic circuit assembly 2 includes a magnetic conductor, a first excitation coil 22, a second excitation coil 23 and a central magnetic pole 24, and the magnetic conductor includes a first pole plate 211, a first pole ring 212, a second pole plate 213, a second pole ring 214, a third pole plate 215 and a bottom connecting plate 216 arranged in sequence from top to bottom, the first pole plate 211, the first pole ring 212, the second pole plate 213, the second pole ring 214, the third pole plate 215 and the bottom connecting plate 216 have the same outer ring diameter D3, the first pole plate 211, the second pole plate 213 and the third pole plate 215 have the same inner ring diameter d1, and the The first pole ring 212 and the second pole ring 214 have the same inner ring diameter d2, d1 is smaller than d2, and a first annular storage space is formed between the first pole plate 211, the first pole ring 212 and the second pole plate 213, and the first annular storage space is used to set the first excitation coil 22. A second annular storage space is formed between the second pole plate 213, the second pole ring 214 and the third pole plate 215, and the second annular storage space is used to set the second excitation coil 23. The center magnetic pole 24 is set on the bottom connecting plate 216, and the dynamic coil frame 11 is inserted into the annular space formed by the magnetic conductor and the center magnetic pole 24.

[0036] As an embodiment of the present invention, a plurality of upper guide surfaces 1161 are provided on the outer wall of the first skirt plate 1131. The upper guide surfaces 1161 extend axially and are evenly distributed circumferentially. A plurality of upper guide roller assemblies 3 are provided on the first pole plate 211. The upper guide roller assemblies 3 cooperate with the upper guide surfaces 1161 to form a guide pair. The outer wall of the fourth skirt plate 1134 is provided with a plurality of lower guide surfaces 1162. The lower guide surfaces 1162 extend axially and are evenly distributed circumferentially. The third pole plate 215 is provided with a plurality of lower guide roller assemblies 4. The lower guide roller assemblies 4 cooperate with the lower guide surfaces 1162 to form a guide pair. There are at least three upper guide roller assemblies 3 and at least three lower guide roller assemblies 4. As an embodiment of the present utility model, there are four upper guide surfaces 1161, and the number and position of the upper guide surfaces 1161 correspond one-to-one to the number and position of the upper ribs 1151; there are four lower guide surfaces 1162, and the number and position of the lower guide surfaces 1162 correspond one-to-one to the number and position of the lower ribs 1152.

[0037] The center magnetic pole 24 includes an upper center magnetic pole 241, a middle center magnetic pole 242 and a lower center magnetic pole 243 arranged in sequence from top to bottom, wherein the upper center magnetic pole 241 is an equally divided annular structure, the lower center magnetic pole 243 is an equally divided annular structure, and the middle center magnetic pole 242 is an annular structure. As an embodiment of the present utility model, the upper center magnetic pole 241 is a four-equally divided annular structure, and the lower center magnetic pole 243 is a four-equally divided annular structure. In terms of axial position, the upper center magnetic pole 241 corresponds to the first pole plate 211 and the second pole ring 214, the middle center magnetic pole 242 corresponds to the second pole plate 213, and the middle center magnetic pole 242 is located between the upper rib 1151 and the lower rib 1152. The lower center magnetic pole 243 corresponds to the second pole ring 214 and the third pole plate 215. The bottom connecting plate 216 connects the lower center magnetic pole 243 and the third pole plate 215. A gap exists between the center magnetic pole 24 and the smallest inner ring of the magnetic conductor, which is used to install the dynamic coil frame 11 and the drive coil. In terms of axial position, the first pole plate 211 corresponds to the first drive coil 12, the second pole plate 213 corresponds to the second drive coil 13, and the third pole plate 215 corresponds to the third drive coil 14.

[0038] The first, second, and third pole plates 211, 213, and 215 are each provided with a plurality of first ventilation holes 25, evenly distributed around the circumference. The bottom connecting plate 216 is provided with a plurality of second ventilation holes 26, evenly distributed around the circumference. An air suction hood 5 is provided below the magnetic circuit assembly 2, covering the bottom connecting plate 216. The air intake of the air suction hood 5 is connected to an external fan.

[0039] The three-drive electric vibrator provided by the present invention adopts three sets of drive coils, which greatly increases the thrust of the vibrator and improves the utilization efficiency of the magnetic field inside the vibrator. A dynamic coil frame 11 adapted for the three sets of drive coils is provided to enhance the strength and rigidity of the dynamic coil frame 11. The mesh ring solves the problem of high heat generated by multiple drive coils, and at the same time has higher vertical vibration accuracy and smaller lateral vibration.

[0040] It should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each implementation method can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

[0041] The series of detailed descriptions listed above are only specific descriptions of feasible implementation methods of the present invention. They are not intended to limit the scope of protection of the present invention. Any equivalent implementation methods or changes that do not deviate from the technical spirit of the present invention should be included in the scope of protection of the present invention.

Claims

1. A three-drive electric vibrator, characterized by: The invention comprises a magnetic circuit component (2) and a dynamic coil component (1), wherein the dynamic coil component (1) is arranged in the magnetic circuit component (2), the dynamic coil component (1) comprises a dynamic coil frame (11) and n groups of driving coils wound on the dynamic coil frame (11), wherein n is a positive integer greater than or equal to 2, the dynamic coil frame (11) comprises a top panel (111) and a center column (112) connected to each other, the top panel (111) and the center column (112) are coaxially arranged, and n+1 skirt panels are arranged in the axial direction of the center column (112), the skirt panel at the top is connected to the top panel (111), and the bottom surface of the skirt panel at the bottom is flush with the bottom surface of the center column (112), a mesh ring is arranged between two adjacent skirt panels, and a driving coil is wound on each mesh ring.

2. The three-drive electric vibrator according to claim 1, characterized in that: The outer diameter D1 of the mesh ring is smaller than the outer diameter D2 of the skirt plate.

3. The three-drive electric vibrator according to claim 1, characterized in that: A plurality of upper ribs (1151) and a plurality of lower ribs (1152) are provided on the central column (112), the driving coils are in three groups, the skirts are in four groups, and the four skirts are respectively, from top to bottom, a first skirt (1131), a second skirt (1132), a third skirt (1133) and a fourth skirt (1134). The plurality of upper ribs (1151) are uniformly distributed circumferentially with the central column (112) as the center, the upper ribs (1151) connect the central column (112), the first skirt (1131) and the second skirt (1132), and the plurality of lower ribs (1152) are uniformly distributed circumferentially with the central column (112) as the center, and the lower ribs (1152) connect the central column (112), the third skirt (1133) and the fourth skirt (1134).

4. The three-drive electric vibrator according to claim 3, characterized in that: The magnetic circuit assembly (2) comprises a magnetic conductor, a first excitation coil (22), a second excitation coil (23) and a central magnetic pole. The magnetic conductor comprises a first pole plate (211), a first pole ring (212), a second pole plate (213), a second pole ring (214), a third pole plate (215) and a bottom connecting plate (216) arranged in sequence from top to bottom. The first pole plate (211), the first pole ring (212), the second pole plate (213), the second pole ring (214), the third pole plate (215) and the bottom connecting plate (216) have the same outer ring diameter D3, and the first pole plate (211), the second pole plate (213) and the third pole plate (215) have the same inner ring diameter D3. d1, the first pole ring (212) and the second pole ring (214) have the same inner ring diameter d2, d1 is smaller than d2, a first annular storage space is formed between the first pole plate (211), the first pole ring (212) and the second pole plate (213), and the first annular storage space is used to set the first excitation coil (22), a second annular storage space is formed between the second pole plate (213), the second pole ring (214) and the third pole plate (215), and the second annular storage space is used to set the second excitation coil (23), the central magnetic pole is arranged on the bottom connecting plate (216), and the dynamic coil frame (11) is inserted into the annular space formed by the magnetic conductor and the central magnetic pole.

5. The three-drive electric vibrator according to claim 4, characterized in that: A plurality of upper guide surfaces (1161) are provided on the outer side wall of the first skirt plate (1131), a plurality of upper guide roller assemblies (3) are provided on the first pole plate (211), and the upper guide roller assemblies (3) cooperate with the upper guide surfaces (1161), a plurality of lower guide surfaces (1162) are provided on the outer side wall of the fourth skirt plate (1134), and a plurality of lower guide roller assemblies (4) are provided on the third pole plate (215), and the lower guide roller assemblies (4) cooperate with the lower guide surfaces (1162).

6. The three-drive electric vibrator according to claim 5, characterized in that: The upper guide surface (1161) corresponds to the upper rib plate (1151) one-to-one, and the lower guide surface (1162) corresponds to the lower rib plate (1152) one-to-one.

7. The three-drive electric vibrator according to claim 4, characterized in that: The central magnetic pole comprises an upper central magnetic pole (241), a middle central magnetic pole (242) and a lower central magnetic pole (243) which are arranged in sequence from top to bottom. The upper central magnetic pole (241) is an equally divided annular structure, the lower central magnetic pole (243) is an equally divided annular structure, and the middle central magnetic pole (242) is an annular structure.

8. The three-drive electric vibrator according to claim 7, characterized in that: In terms of axial position, the upper center magnetic pole (241) corresponds to the first pole plate (211) and the second pole ring (214), the middle center magnetic pole (242) corresponds to the second pole plate (213), the center magnetic pole is located between the upper rib plate (1151) and the lower rib plate (1152), and the lower center magnetic pole (243) corresponds to the second pole ring (214) and the third pole plate (215).

9. The three-drive electric vibrator according to claim 4, characterized in that: A plurality of first ventilation holes (25) are provided on each of the first electrode plate (211), the second electrode plate (213) and the third electrode plate (215), and the plurality of first ventilation holes (25) are evenly distributed in the circumferential direction; and a plurality of second ventilation holes (26) are provided on the bottom connecting plate (216), and the plurality of second ventilation holes (26) are evenly distributed in the circumferential direction.

10. The three-drive electric vibrator according to claim 1, characterized in that: An air suction hood (5) covering a bottom connecting plate (216) is provided at the lower portion of the magnetic circuit assembly (2), and an air suction port of the air suction hood (5) is connected to an external fan.

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