A vibration exciter unit, a three-way vibration exciter and a steerable vibration exciter

Abstract

The present invention relates to an exciter unit, a three-way exciter and a steerable exciter, the exciter unit comprising a motor housing, a stator assembly and a mover assembly; comprising a motor housing, a stator assembly and a mover assembly; a receiving cavity is formed inside the motor housing; the stator assembly comprises a coil box and a coil arranged inside the coil box; the coil box is fixed inside the receiving cavity; the mover assembly is provided with a magnet; the mover assembly is connected to the motor housing through a leaf spring, the leaf spring is used to control the mover assembly to reciprocate in a single plane inside the receiving cavity, and the movement direction of the mover assembly is strictly limited by the leaf spring, which, on the one hand, prevents the mover from moving in different directions, controls the processing accuracy, and reduces the excitation noise, and on the other hand, the leaf spring can achieve a wide-band excitation effect. The three-way exciter and the steerable exciter are formed based on the combination of the above-mentioned exciter units.

Description

Technical Field

[0001] The invention belongs to the technical field of exciter structure design, and in particular relates to an exciter unit, a three-way exciter and a steerable exciter. Background Art

[0002] When a traditional swinging linear motor is used on a vibrator, there is no other limiting device in the specified swinging direction, which causes the mover to have a certain degree of directional movement during movement, resulting in a lot of swinging noise. In severe cases, it may cause the motor to malfunction, and the output accuracy and excitation bandwidth of the traditional vibrator cannot be guaranteed. Summary of the invention

[0003] The present invention aims at the technical problems existing in the prior art and provides a vibration exciter unit to solve the technical problem that the mover of the vibration exciter unit in the prior art has a certain degree of dysdirectional movement during movement, resulting in loud swinging noise and, in severe cases, operating failure.

[0004] The technical solution of the present invention to solve the above technical problems is as follows:

[0005] An exciter unit comprises a motor housing, a stator assembly and a mover assembly;

[0006] A receiving cavity is formed inside the motor housing;

[0007] The stator assembly includes a coil box and a coil disposed inside the coil box; the coil box is fixed inside the accommodating cavity;

[0008] The mover assembly is connected to the motor housing via a leaf spring, and the leaf spring is used to control the mover assembly to perform reciprocating vibration in a single plane inside the accommodating cavity.

[0009] After adopting the above technical solution, this application has at least the following technical effects:

[0010] The present application adopts a leaf spring to connect the mover assembly and the motor housing, so that the mover assembly vibrates back and forth on both sides of the coil box to form a swing. Since the leaf spring is easy to bend in the thickness direction, that is, the minimum stiffness plane, and has large tensile stiffness and bending stiffness in the other two directions, the movement direction of the mover assembly is strictly controlled, so that the mover assembly can only swing in the thickness direction of the leaf spring, thereby preventing the mover assembly from moving in different directions, accurately controlling the output direction, and reducing the excitation noise. Using a voice coil motor as a drive can improve the output accuracy of the exciter, and the precisely designed leaf spring mechanism can improve the excitation bandwidth of the exciter.

[0011] Based on the above technical solution, the present invention can also be improved as follows.

[0012] Furthermore, the mover assembly includes two mass blocks, which are symmetrically arranged on both sides of the coil and are connected and fixed to each other. Magnets are arranged on the two mass blocks. One end of the leaf spring is fixed to the mass block, and the other end is fixed to the motor housing.

[0013] Furthermore, one end of the leaf spring fixedly connected to the motor housing is located on the same side of the accommodating cavity.

[0014] Furthermore, the magnet is arranged on a side of the mass block close to the coil box.

[0015] Furthermore, the motor housing includes a housing body and end covers, the two ends of the housing body are open, the end covers are detachably installed on the two ends of the housing body, the housing body and the end covers are internally enclosed to form a accommodating cavity, and the coil box is fixedly connected to one of the end covers.

[0016] Furthermore, two corresponding fixing platforms are provided inside the shell body, one end of the leaf spring is fixed to the fixing platform through a first pressing block, and the other end is fixed to the mass block through a second pressing block.

[0017] Furthermore, the two mass blocks are both plate-shaped and connected via a transfer block arranged in parallel with the coil box. Leaf springs are arranged on both sides of each mass block.

[0018] Furthermore, the two mass blocks are both L-shaped, and the two mass blocks are buckled together to form a hollow combined structure, and the coil box is arranged inside the cavity of the hollow combined structure.

[0019] The present application also provides a three-way exciter, which includes a support plate and three exciter units as described above, wherein the three exciter units are arranged side by side on the support plate in a horizontal plane, and the thickness directions of the leaf springs in the three exciter units are arranged perpendicularly in pairs.

[0020] The present application also provides a three-way exciter, comprising a support plate and three exciter units as described above, wherein the three exciter units are arranged side by side on the support plate in a vertical direction, and the thickness directions of the leaf springs in the three exciter units are arranged perpendicularly in pairs.

[0021] The present application also provides a steerable vibration exciter, comprising a rotating seat and the vibration exciter unit as described above, wherein the vibration exciter unit is rotatably mounted on the rotating seat, and the rotation axis of the linear motor is arranged perpendicular to the thickness direction of its leaf spring.

[0022] Furthermore, the rotating seat includes a rotating base plate and two oppositely arranged support arms, the linear motor is arranged between the two support arms, the motor housing is rotatably arranged on the support arms corresponding to the two sides of the support arms through a rotating shaft and a bearing, an arc-shaped guide groove is formed on the support arm, and a locking member for locking and limiting the position with the motor housing is arranged in the arc-shaped guide groove. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 A schematic diagram of the structure of an exciter unit provided in Example 1 of the present application;

[0024] Figure 2 This is an optional equipment schematic diagram of the stator assembly and the mover assembly in the first embodiment of the present application;

[0025] Figure 3 for Figure 2 Schematic diagram of the connection structure of the corresponding mass block;

[0026] Figure 4 for Figure 2 Schematic diagram of the corresponding leaf spring installation structure;

[0027] Figure 5 It is another optional equipment schematic diagram of the stator assembly and the mover assembly in the embodiment of the present application;

[0028] Figure 6 This is a schematic diagram of the structure of the stator assembly in Example 1 of the present application;

[0029] Figure 7 A schematic diagram of the first type of structure of a three-way exciter provided in Example 2 of the present application;

[0030] Figure 8 A schematic diagram of the second type of structure of a three-way exciter provided in Example 2 of the present application;

[0031] Fig. 9 A schematic diagram of the third type of structure of a three-way exciter provided in Example 2 of the present application;

[0032] Fig.10 A schematic diagram of the first type of structure of a steerable vibration exciter provided in Example 3 of the present application;

[0033] Fig.11 Schematic diagram of the output characteristic curve of the exciter's driving force and input current. DETAILED DESCRIPTION

[0034] The principles and features of the present invention are described below. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention.

[0035] It should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integrally formed structure. For ordinary technicians in this field, the specific meanings of such terms in this patent can be understood according to specific circumstances.

[0036] Embodiment 1

[0037] like Figures 1 to 6 As shown, the present application provides an exciter unit, which includes a motor housing 10 , a stator assembly 20 and a mover assembly 30 .

[0038] The motor housing 10 has an accommodating cavity 10a formed therein.

[0039] The stator assembly 20 includes a coil box 21 and a coil 22 disposed inside the coil box 21 ; the coil box 21 is fixed inside the accommodating cavity 10 a .

[0040] For example, the coil box 21 includes a box body 211 and a cover body 212 . The coil 22 is disposed in the box body 211 . To ensure the stability of the coil 22 , the outside of the coil 22 is wrapped with glue.

[0041] The movable subassembly 30 is connected to the motor housing 10 via a leaf spring 33 , and the leaf spring 33 is used to control the movable subassembly 30 to reciprocate in a single plane inside the accommodating cavity 10 a .

[0042] Specifically, the stiffness of the leaf spring in the horizontal direction (i.e., the direction perpendicular to the thickness of the leaf spring) is much greater than the stiffness in the vertical direction (i.e., the thickness direction of the leaf spring), so that the leaf spring is easy to bend in the thickness direction, i.e., the minimum stiffness plane, while it has large tensile stiffness and bending stiffness in the other two directions, thereby strictly controlling the movement direction of the mass block so that the mass block can only swing in the thickness direction of the leaf spring, thereby preventing the mover from moving in different directions and accurately controlling the direction of the excitation output.

[0043] The leaf spring 33 is a metal structure. Specifically, in an optional embodiment, its stiffness in the horizontal direction is at least 15 times higher than that in the vertical direction, for example, it can be 20 times, 25 times, 30 times, 35 times...100 times, or even higher.

[0044] As an optional embodiment, the motor housing 10 includes a housing body 11 and an end cover 12, the two ends of the housing body 11 are open, and the end cover 12 is detachably installed on the two ends of the housing body 11, the housing body 11 and the end cover 12 are internally enclosed to form a accommodating cavity 10a, and the coil box 21 is fixedly connected to one of the end covers 12, for example, the coil box 21 is fixed to the end cover 12 by screws.

[0045] The mover assembly 30 includes two mass blocks 31, which are symmetrically arranged on both sides of the coil box 21 and are connected and fixed to each other, and a magnet 32 ​​is arranged on each of the mass blocks 31; leaf springs 33 are arranged on both sides of the mass blocks 31, one end of the leaf spring 33 is fixedly connected to the mass block 31, and the other end is fixedly connected to the motor housing 10, and the end of the leaf spring 33 fixedly connected to the motor housing 10 is located on the same side of the accommodating cavity 10a.

[0046] As a preferred embodiment, the magnet 32 ​​is disposed on a side of the mass block 31 close to the coil box 21 .

[0047] In an optional embodiment, the two mass blocks 31 are both plate-shaped and connected via a transfer block 34 arranged in parallel with the coil box 21. Leaf springs 33 are arranged on both sides of each mass block 31.

[0048] In another optional embodiment, the two mass blocks 31 are both L-shaped blocks, and the two mass blocks 31 are buckled together to form a hollow combined structure, and the coil box 21 is arranged inside the cavity of the hollow combined structure.

[0049] In order to facilitate the installation of the leaf spring 33 , two corresponding fixing platforms 111 are provided inside the shell body 11 . One end of the leaf spring 33 is fixed to the fixing platform 111 through a first clamping block 331 , and the other end is fixed to the mass block 31 through a second clamping block 332 .

[0050] For a single exciter, the output of the exciter for:

[0051]

[0052] In the formula, is the mass of the exciter mover, is the leaf spring stiffness, is the displacement of the device, is the displacement of the exciter mover.

[0053]

[0054] In the formula, is the electromagnetic force, is the output frequency, is the damping ratio of the exciter, j is an imaginary number, Power the vibrator.

[0055] The driving force of the exciter is derived With electromagnetic force The output characteristic curve is as follows Fig.11 As shown, the amplitude ratio is the vertical axis and the frequency ratio is the horizontal axis.

[0056] According to the output characteristic curve, the elastic force of the leaf spring is a part of the driving force of the exciter. When the exciter works near the fundamental frequency of the leaf spring, it can effectively reduce the demand for electromagnetic force and thus achieve the purpose of reducing power consumption. Therefore, in practical applications, when power consumption is not limited, the fundamental frequency of the exciter can be designed to be much lower than the excitation frequency, so that the excitation force is more linear and the design of the controller is simplified. In this application, thanks to the design of parallel leaf springs, the fundamental frequency and the second-order frequency of the exciter can differ by more than 20 times, so that the linear working bandwidth of the exciter is large enough, thereby improving the accuracy of the excitation force.

[0057] This embodiment adopts the design of the coil box 21 and the mass block 31. By controlling the input of current, the mass block 31 is made to reciprocate on both sides of the coil box 21 to form a swing. Since the leaf spring 33 is easy to bend in its thickness direction, that is, the minimum stiffness plane, and has large tensile stiffness and bending stiffness in the other two directions, the movement direction of the mass block 31 is strictly restricted, so that the mass block 31 can only swing in the thickness direction of the leaf spring 33, thereby preventing the mover from moving in different directions and reducing the motor noise.

[0058] It is understandable that the structure of the motor housing 10 and the installation form of the leaf spring 33 can be various other than the present embodiment, which will not be elaborated here. However, the related exciter structures designed with the above-mentioned technical concepts should fall within the scope of protection of this application.

[0059] Embodiment 2

[0060] like Figure 7 As shown, based on the above-mentioned embodiment 1, the present application also provides a three-way exciter, which includes a support plate 100 and three exciter units 200 as described above, and the three exciter units 200 are arranged side by side on the support plate 100 on a horizontal plane, and the thickness directions of the leaf springs 33 in the three exciter units 200 are arranged vertically in pairs.

[0061] According to the description in Example 1, the movable subassembly of the exciter unit 200 can swing strictly in one direction. When the three exciter units 200 are arranged on the same plane and the thickness directions of the leaf springs 33 are perpendicular to each other, the vibration of the motor housing driven by the swing of the three exciter units 200 is transmitted to the support plate, and excitation in three axial directions that are perpendicular to each other can be achieved, thereby forming a three-way exciter.

[0062] The three-way exciter has a simple structure. In actual use, one-way, two-way or three-way excitation selection is realized according to the opening and closing of different exciter units 200. At the same time, more types of excitation states can be realized according to the control of the swing frequency and amplitude of different exciter units 200.

[0063] As another example of this embodiment, Figure 8 As shown, the three exciter units 200 may also be stacked on the support plate 100 in the vertical direction. Except for the structure being different from the above embodiment, the use effect and beneficial effects achieved are similar and will not be elaborated here.

[0064] It is understandable that the three vibration exciter units 200 may also be arranged in other directions, such as one on the side and the other two stacked, and the housings between different vibration exciter units 200 may be designed separately, such as Fig. 9 As shown, it can also be integrally formed, which is not exhaustive here.

[0065] Embodiment 3

[0066] like Fig.10 As shown, the present application also provides a steerable vibration exciter, which includes a rotating seat 300 and the vibration exciter unit 200 as described above, wherein the vibration exciter unit 200 is rotatably mounted on the rotating seat, and the rotation axis of the vibration exciter unit 200 is arranged perpendicular to the thickness direction of its leaf spring 33.

[0067] Furthermore, the rotating seat 300 includes a rotating base plate 310 and two oppositely arranged support arms 320, the exciter unit 200 is arranged between the two support arms 320, and the motor housing 10 is rotatably arranged on the support arms 320 corresponding to the two sides of the support arms 320 through a rotating shaft 321 and a bearing 322, and an arc-shaped guide groove 32a is formed on the support arm 320, and a locking member 323, such as a locking bolt, is arranged in the arc-shaped guide groove 32a for locking and limiting the position with the motor housing 10.

[0068] The steerable vibration exciter has a simple structure. In actual use, according to the vibration exciter unit 200 being locked at different deflection angles on the rotating seat 300, vibration in different directions can be achieved. It can be used alone or in combination to form a richer excitation mode.

[0069] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A steerable vibration exciter, characterized in that: It includes an exciter unit and a rotating seat, wherein the exciter unit includes a motor housing and a voice coil motor, and the voice coil motor includes a stator assembly and a mover assembly; A receiving cavity is formed inside the motor housing; The stator assembly includes a coil box and a coil disposed inside the coil box; the coil box is fixed inside the accommodating cavity; The movable subassembly is provided with a magnet; the movable subassembly is connected to the motor housing through a parallel flat leaf spring, and the leaf spring is used to control the movable subassembly to reciprocate in a single direction in the thickness direction of the leaf spring inside the accommodating cavity; The exciter unit is adjustably rotatably mounted on the rotating seat, and the rotation axis of the exciter unit is arranged perpendicular to the thickness direction of its leaf spring; the rotating seat includes a rotating base plate and two oppositely arranged support arms, the exciter unit is arranged between the two support arms, and the motor housing is rotatably arranged on the support arms through a rotating shaft and a bearing corresponding to the two sides of the support arms, an arc-shaped guide groove is formed on the support arm, and a locking member for locking and limiting with the motor housing is arranged in the arc-shaped guide groove.

2. The steerable vibration exciter according to claim 1, characterized in that: The mover assembly includes two mass blocks, which are symmetrically arranged on both sides of the coil and are connected and fixed to each other. Magnets are arranged on the two mass blocks. One end of the leaf spring is fixed to the mass block, and the other end is fixed to the motor housing.

3. The steerable vibration exciter according to claim 2, characterized in that: One end of the leaf spring fixedly connected to the motor housing is located on the same side of the accommodating cavity, and the two leaf springs are arranged in parallel.

4. The steerable vibration exciter according to claim 2, characterized in that: The magnet is arranged on a side of the mass block close to the coil box.

5. The steerable vibration exciter according to claim 2, characterized in that: The motor housing includes a housing body and end covers, the two ends of the housing body are open, the end covers are detachably installed on the two ends of the housing body, the housing body and the end covers are enclosed to form an accommodating cavity, and the coil box is fixedly connected to one of the end covers.

6. The steerable vibration exciter according to claim 5, characterized in that: Two corresponding fixing platforms are arranged inside the shell body, one end of the leaf spring is fixed to the fixing platform through a first pressing block, and the other end is fixed to the mass block through a second pressing block.

7. The steerable vibration exciter according to claim 2, characterized in that: The two mass blocks are both plate-shaped and connected via a transfer block arranged in parallel with the coil box, and leaf springs are arranged on both sides of each mass block.

8. The steerable vibration exciter according to claim 2, characterized in that: The two mass blocks are both L-shaped blocks, and the two mass blocks are buckled to form a hollow combined structure, and the coil box is arranged inside the cavity of the hollow combined structure.

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