A polyhedral voice coil motor

Abstract

The utility model discloses a kind of polyhedral guiding voice coil motor, including shell and sequentially assembled mover motion shaft, guide column and base according to from top to bottom order;Base is assembled at the bottom of shell, to form a closed chamber in shell;In the closed chamber, guide column is coaxially arranged with the mover motion shaft, the upper end of guide column is inserted into the lower end of the mover motion shaft and extends to the inside of the mover motion shaft, and the lower end of guide column is positioned on the base;The upper end of base is provided with a hole at corresponding position of mover motion shaft;Mover motion shaft has two states of upward stretching and downward contraction, since lead screw, slider and feedback fourth sensor in prior art are all independent, leading to large structure, and the utility model can make mechanism compact small volume by the coordination of stator, mover motion shaft and guide column three.

Description

Technical Field

[0001] This utility model relates to the field of voice coil motor technology, specifically to a polyhedral guided voice coil motor. Background Technology

[0002] With the continuous development of society, air pollution in some areas has become increasingly serious. At the same time, due to diseases and other reasons, respiratory diseases such as lung diseases have increased, which has increased the demand for ventilators and also driven a sharp increase in the demand for key components of ventilators.

[0003] Traditional ventilators use electromagnets to control the opening and closing of proportional valves, and a rotary motor drives a crank-slider mechanism to generate reciprocating motion, thereby driving the piston pump. In an ideal linear electromagnet, the strength of the magnetic field has a linear relationship with the current; that is, the magnetic field strength increases or decreases linearly with changes in current. However, in practical electromagnets, the magnetic field strength is not uniquely related to changes in current; it is also affected by the previous magnetization state. When the direction or magnitude of the current changes, the magnetic field strength of the electromagnet does not respond immediately but exhibits a certain hysteresis effect. This hysteresis effect leads to a nonlinear relationship, meaning the magnetic field strength no longer increases or decreases linearly with changes in current. This results in low valve opening control accuracy, and the crank-slider mechanism also generates significant noise during motion transmission. Therefore, high-end ventilators generally use voice coil motors to regulate the valve opening degree and provide the reciprocating motion required by the pump.

[0004] A representative example is patent document CN202111472056.3, which discloses a linear reciprocating voice coil motor. This patent provides a low-friction guiding scheme and a long-life electrical connection scheme for the voice coil motor. Specifically, one end of the mover is flexibly supported, while the other end is guided by a bearing, employing a flexible-low-friction bearing composite guiding scheme to reduce system friction. Furthermore, this patent uses a flexible electrical connection between the coil and the external environment, transferring motion deformation from the conductor to a deformation-resistant flexible electrical adapter, avoiding conductor fatigue breakage and improving the lifespan of the electrical connection.

[0005] The aforementioned patent document discloses a voice coil motor; however, the technical solution provided in the aforementioned patent document still has limitations in practical implementation, for the following reasons:

[0006] First, the flexible guide is limited by the deformation range of the flexible support plate, which means it can only perform short-stroke movements and cannot achieve longer-stroke movements.

[0007] Secondly, the lifespan of the flexible guide motor depends on the actual lifespan of the flexible support plate. The fatigue strength of high-quality support plates and good-quality support plates are different, so their lifespans are also different. This results in the lifespan being linked to a certain component, meaning that the quality of a certain component can affect the lifespan of the equipment.

[0008] Secondly, the assembly process of the flexible support sheet requires high precision and must not involve bending. If it is bent, creases will appear on the flexible support sheet, affecting its service life.

[0009] Finally, the power output shaft described in the aforementioned patent document is a cylindrical structure. During linear reciprocating motion, since there is no axial restriction, if the working frequency is high, there is a chance of self-rotation, which causes the power output shaft to vibrate and generate noise. This is because the radial constraint force applied to the power output shaft by the flexible support plate is small. During the up-and-down movement, the power output shaft is prone to radial oscillation. This oscillation is a vibration phenomenon, which results in significant noise and affects the positional accuracy.

[0010] Therefore, how to overcome the shortcomings of the existing technology mentioned above has become the subject of this utility model. Utility Model Content

[0011] This invention provides a multi-faceted guided voice coil motor, which aims to solve the technical problems mentioned in the background art.

[0012] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a multi-faceted guided voice coil motor, comprising a housing and a mover shaft, a guide post, and a base assembled sequentially from top to bottom; the base is assembled at the bottom of the housing to form a closed chamber inside the housing; in this closed chamber, the guide post is coaxially arranged with the mover shaft, the upper end of the guide post is inserted into the lower end of the mover shaft and extends into the interior of the mover shaft, and the lower end of the guide post is positioned on the base; the upper end of the housing is coaxially provided with a through hole corresponding to the upper end of the mover shaft; the mover shaft has an upward extension and a downward extension. The motor has two retracted states. In the extended state, the upper end of the moving shaft extends out of the through hole. The guide post has a limiting surface arranged along the axial direction. The moving shaft has a positioning surface inside that cooperates with the limiting surface. The rotation of the moving shaft around the guide post is limited by the cooperation between the limiting surface and the positioning surface. The multi-faceted guide voice coil motor also includes a stator, which is sleeved on the inner wall of the closed chamber and is correspondingly arranged with the moving shaft. The stator includes a stator ring fixedly installed on the inner wall of the closed chamber. The stator ring serves as the magnetic field driving part for the axial reciprocating motion of the moving shaft.

[0013] In the above scheme, the specific method for restricting the rotation of the moving shaft around the guide post is as follows: the guide post has a limiting surface or limiting groove arranged along the axial direction, and the moving shaft has a positioning surface or rolling element that cooperates with the limiting surface or limiting groove. The rotation of the moving shaft around the guide post is restricted by the cooperation between the limiting surface or limiting groove and the positioning surface or rolling element.

[0014] In the above scheme, the stator ring sleeve is a ring structure, and the motion principle between the stator ring sleeve and the mover shaft can refer to the working principle of the magnetic shuttle in the prior art.

[0015] Specifically, the magnetic field generated by the energized stator ring interacts with the magnetic field generated by the permanent magnet (i.e., the moving axis) to produce regular linear motion. The magnitude of the driving force is controlled by changing the magnitude of the energized current, and the direction of motion is controlled by changing the direction of the energized current.

[0016] The difference between the above solution and traditional lead screw drives lies in the fact that traditional lead screw drives use a rotary motor connected to the lead screw via a coupling, and the rotation of the lead screw drives a slider to move the load linearly. Because there are multiple mechanical links between the motor and the load, the accuracy is inevitably directly affected.

[0017] This application uses the cooperation between the stator ring sleeve and the mover shaft to achieve linear motion of the load, eliminating intermediate transmission machinery and removing various error factors caused by intermediate links.

[0018] A further technical solution is that the moving shaft includes a guide sleeve and a moving sleeve coaxially assembled; the guide sleeve is coaxially sleeved on the guide post, and the upper end of the guide sleeve is inserted into the lower end of the moving sleeve for positioning, the positioning surface is disposed on the inner side of the guide sleeve, and the upper end of the moving sleeve has an output shaft for extending out of the through hole.

[0019] This design ensures that there is no wear between the mover sleeve and the guide post. In other words, the only structure in the mover shaft that mainly cooperates with the stator ring sleeve is the mover sleeve, while the guide sleeve only serves a guiding function. This reduces vibration and noise.

[0020] A further technical solution involves a clearance fit between the stator ring sleeve and the mover sleeve. This design prevents friction between the stator ring sleeve and the mover sleeve.

[0021] In a further technical solution, a support portion is provided on the outer side of the guide sleeve, and the surface of the support portion abuts against the lower end face of the moving sleeve.

[0022] This design allows the guide sleeve and the moving sleeve to fit together perfectly, preventing vibration during reciprocating linear motion (especially during resetting).

[0023] In a further technical solution, the stator further includes a stator frame coaxially arranged with the mover's motion shaft, the stator frame being positioned and connected to the inner sidewall of the housing; a fixing area is provided on the upper outer circumferential surface of the stator frame, and the top end of the stator frame is located within the through hole, the stator ring being sleeved on the outside of the fixing area; the lower end of the stator frame is positioned and connected to the upper surface of the base, and viewed from the longitudinal section of the housing, the enclosed chamber is arranged along the axial direction of the stator frame and passes through the lower end of the stator frame; a limiting through hole is coaxially formed at the upper end of the stator frame corresponding to the upper end of the mover's motion shaft.

[0024] This design ensures that the stator ring sleeve is fixed in the position corresponding to the mover sleeve, preventing any change in position.

[0025] In a further technical solution, a receiving groove is provided on the outer peripheral surface of the stator frame, and a position sensor is installed in the receiving groove.

[0026] Specifically, the position sensor serves as a position feedback function.

[0027] In one embodiment of the position sensor, the position sensor is a third sensor (e.g., a reading head) installed in the receiving slot for reading / counting; at the same time, in order to enable the third sensor to perform sufficient reading operations, a fourth sensor (e.g., a grid ruler) is provided on the outer side of the guide sleeve at a position corresponding to the third sensor.

[0028] In the second embodiment of the position sensor, the position sensor includes a first sensor installed at the bottom of the guide sleeve; in order to fully respond to the first sensor, a second sensor corresponding to the first sensor is provided on the lower circumference of the guide post. The cooperation between the first sensor and the second sensor can be selected as contact type, inductive type, or other sensors that can provide position feedback function.

[0029] The relationship between the fourth sensor and the third sensor is as follows: the third sensor is responsible for acquiring and processing signals, while the fourth sensor provides the signal data required for measurement. There is relative motion between the third sensor and the fourth sensor, that is, the third sensor is fixed and the fourth sensor is installed on the moving body. The third sensor acquires signals from different positions of the fourth sensor and transmits the acquired signals to the control system to achieve position feedback and precision control.

[0030] The terms "first," "second," etc., used in this article do not specifically refer to order or sequence, nor are they intended to limit this case; they are merely used to distinguish components or operations described using the same technical terms.

[0031] The terms “connection,” “restriction,” or “positioning” used in this article can refer to two or more components or devices making direct physical contact with each other, or making indirect physical contact with each other, or to two or more components or devices operating or acting on each other.

[0032] The terms “include,” “including,” and “have” used in this article are all open-ended, meaning they include but are not limited to.

[0033] Unless otherwise specified, the terms used herein generally have their ordinary meaning in the context of the art, the subject matter, and the specific context. Certain terms used to describe this case will be discussed below or elsewhere in this specification to provide additional guidance to those skilled in the art in describing the case.

[0034] The terms “front,” “back,” “up,” “down,” “left,” and “right” used in this article are directional terms. In this case, they are only used to describe the positional relationship between the structures and are not intended to limit the specific direction of the protection scheme or its actual implementation.

[0035] The working principle and advantages of this utility model are as follows:

[0036] 1. The difference between this application and traditional lead screw drives lies in the following: Traditional lead screw drives use a rotary motor, which connects to the lead screw via a coupling. The rotation of the lead screw drives a slider to move the load linearly. Because there are multiple mechanical links between the motor and the load, the accuracy is inevitably directly affected.

[0037] This application uses direct drive, and the mover sleeve and output shaft are rigidly guided. That is, after the coil is energized, it directly drives the load to move linearly, eliminating intermediate transmission machinery, eliminating backlash, reducing vibration and noise, and thus reducing control and adjustment links, which can ensure better performance than lead screw adjustment.

[0038] 2-1. The linear reciprocating voice coil motor provided in the above background technology adopts flexible guidance (one end of the mover is flexible support). Although it can reduce the friction of the system, it can only perform short-stroke motion (limited by the deformation range of the flexible support plate) and cannot achieve long-stroke motion.

[0039] In this application, the mover sleeve (e.g., a magnetic sleeve or other metal components) is rigidly connected to the output shaft, eliminating the need to consider material deformation. As long as the stator ring sleeve is long enough, the mover sleeve can move throughout its entire stroke with the output shaft, and there is no need to worry about material fatigue life.

[0040] Secondly, the integrated design of the mover sleeve and output shaft makes the moving body both a guide and a power source, eliminating the need for transitional connections, making the structure more compact, effectively reducing the links that affect motion accuracy, and making the overall product more integrated.

[0041] 2-2. In the linear reciprocating voice coil motor provided in the above background technology, the coil on it moves together with the mover while the magnet remains stationary; in this application, the stator (e.g., the coil) remains stationary while the mover shaft moves. The advantage of this movement is that it does not involve the movement of cables, so there is no need to consider the wiring problem.

[0042] 3. In this application, the guide post, guide sleeve and moving part sleeve are connected in sequence to complete the assembly. The whole process is quick and convenient, and the precision requirements during assembly are not high.

[0043] 4. The limiting surface on the guide post in this application mainly serves to guide and prevent rotation, thereby limiting the moving sleeve in the radial direction. Even if the working frequency is high, there is no chance of self-rotation, so there will be no phenomenon of vibration of the power output shaft affecting the position accuracy.

[0044] 5. In summary, unlike the prior art, the mover shaft and guide column in this application are smaller in size and have greater rigidity after assembly and positioning. Greater rigidity will result in a larger load on the electric cylinder. At the same time, the magnetic field drive will reduce the friction between the mover shaft and guide column, resulting in relatively lower noise, a more compact structure, and higher precision. Furthermore, the polyhedral constraint between the mover shaft and guide column can reduce the wobble and radial runout of the mover shaft during movement. Attached Figure Description

[0045] Appendix Figure 1 This is a schematic diagram of the main structure of the outer shell in an embodiment of the present utility model (first embodiment of the polyhedral guide voice coil motor);

[0046] Appendix Figure 2 for Figure 1 A schematic diagram of the longitudinal section structure of the outer shell along the AA direction (first embodiment of the polyhedral guided voice coil motor);

[0047] Appendix Figure 3 This is a schematic diagram of the main structure of the guide sleeve in the embodiment of the present utility model (first embodiment of the polyhedral guide voice coil motor);

[0048] Appendix Figure 4 for Figure 3 A schematic diagram of the longitudinal section structure of the guide sleeve along the BB direction (first embodiment of the polyhedral guide voice coil motor);

[0049] Appendix Figure 5 for Figure 3A schematic diagram of the longitudinal section structure of the guide sleeve along the CC direction (first embodiment of the polyhedral guide voice coil motor);

[0050] Appendix Figure 6 This is a perspective view of the guide sleeve in an embodiment of the present utility model (first embodiment of a polyhedral guide voice coil motor);

[0051] Appendix Figure 7 This is a perspective view of the stator frame in an embodiment of the present invention (first embodiment of a polyhedral guided voice coil motor);

[0052] Appendix Figure 8 This is a schematic diagram of the longitudinal section structure of the stator frame in an embodiment of the present invention (first embodiment of a polyhedral guided voice coil motor).

[0053] Appendix Figure 9 This is a schematic diagram of a second embodiment of the position sensor provided in this utility model (first embodiment of a polyhedral guided voice coil motor).

[0054] Appendix Figure 10 This is a schematic diagram of a first embodiment of the position sensor provided in this utility model (first embodiment of a polyhedral guided voice coil motor).

[0055] Appendix Figure 11 This is a schematic diagram of a second embodiment of the polyhedral guide voice coil motor provided in this utility model.

[0056] In the above attached figures: 1. Outer shell; 2. Base; 3. Guide post; 4. Moving shaft; 5. Stator; 6. Through hole; 7. Positioning surface; 8. Restricting surface; 9. Stator ring; 10. Guide sleeve; 11. Moving sleeve; 12. Output shaft; 13. Support part; 14. Stator frame; 15. Third sensor; 16. Fourth sensor; 17. Cavity; 18. Receiving groove; 19. Fixing area; 20. Limiting through hole; 21. First sensor; 22. Second sensor; 101. Second outer shell; 601. Through port; 901. Second stator ring; 1001. Second guide sleeve. Detailed Implementation

[0057] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0058] Example: The present invention will be clearly described below with illustrations and detailed description. Any person skilled in the art who understands the examples of the present invention can make changes and modifications based on the technology taught in the present invention without departing from the spirit and scope of the present invention.

[0059] The terminology used herein is for the purpose of describing specific embodiments only and is not intended to limit the scope of this work. Singular forms such as “a,” “this,” “this,” “the,” and “the” as used herein also include plural forms.

[0060] See appendix Figures 1-11 As shown, a multi-faceted guided voice coil motor includes a housing 1 and a mover shaft 4, a guide post 3, and a base 2, which are assembled sequentially from top to bottom. The base 2 is mounted on the bottom of the housing 1 to form a closed chamber inside the housing 1. In this closed chamber, the guide post 3 is coaxially arranged with the mover shaft 4, the upper end of the guide post 3 is inserted into the lower end of the mover shaft 4 and extends into the interior of the mover shaft 4, and the lower end of the guide post 3 is positioned on the base 2. The upper end of the housing 1 is coaxially provided with a through hole 6 corresponding to the upper end of the mover shaft 4. The mover shaft 4 has two states: extending upwards and retracting downwards. In the extended state, the upper end of the mover shaft 4 extends out through the through hole 6; the guide post 3 has a limiting surface 8 arranged along the axial direction, and the interior of the mover shaft 4 is provided with a positioning surface 7 that cooperates with the limiting surface 8. The cooperation between the limiting surface 8 and the positioning surface 7 restricts the rotation of the mover shaft 4 around the guide post 3; the multi-faceted guide voice coil motor also includes a stator 5, which is sleeved on the inner wall of the closed chamber and is arranged correspondingly to the mover shaft 4; wherein, the stator 5 includes a stator ring 9 fixedly installed on the inner wall of the closed chamber, and the stator ring 9 serves as the magnetic field driving part for the axial reciprocating motion of the mover shaft 4.

[0061] In existing technologies, the lead screw, slider, and feedback fourth sensor are all independent components, resulting in a large structure. This invention, however, achieves a compact and small-sized mechanism through the coordinated operation of the stator 5, the mover shaft 4, and the guide post 3. Furthermore, the stator 5 can be optionally configured as a coil core sleeve, and the stator ring sleeve 9 can be optionally configured as a coil ring sleeve.

[0062] Specifically, the stator 5, the mover shaft 4, and the guide post 3 are assembled by sequentially connecting them. The assembly process has low precision requirements. During use, the magnetic field generated by the energized stator 5 interacts with the magnetic field generated by the mover shaft 4 to produce regular linear motion (refer to a magnetic shuttle for details). The magnitude of the driving force is controlled by changing the magnitude of the energizing current, and the direction of motion is controlled by changing the direction of the energizing current. During the entire operation, the guide post 3 can restrict the radial rotation of the mover shaft 4 around the axis of the guide post 3 through the cooperation of the limiting surface 8 and the positioning surface 7, avoiding vibration during the reciprocating motion of the mover shaft 4. At the same time, this combination of the mover shaft 4 and the guide post 3 realizes both guiding and motion operations, with high integration and reduced equipment size.

[0063] It should be noted that the cross-section of the guide post 3 can be polygonal (as per this application). Figure 4 The guide post 3 shown is hexagonal, but it can also be a cylinder with a plane on the outside (see the specific cross-sectional structure for reference). Figure 4 (Outer contour of guide sleeve 10).

[0064] The mover shaft 4 can simultaneously function as a guide, a power source, and an output shaft 12. In other words, the guide sleeve 10 and the mover sleeve 11 can be an integral design or separate designs. However, an integral design presents certain difficulties in processing. To reduce costs, the following embodiment is provided for the mover shaft 4:

[0065] The moving shaft 4 includes a guide sleeve 10 and a moving sleeve 11 coaxially assembled; the guide sleeve 10 is coaxially sleeved on the guide post 3, and the upper end of the guide sleeve 10 is inserted into the lower end of the moving sleeve 11 for positioning. The positioning surface 7 is set inside the guide sleeve 10, and the upper end of the moving sleeve 11 has an output shaft 12 for extending out of the through hole 6.

[0066] The mover sleeve 11 and the output shaft 12 are designed as a single unit, and both are made of magnets.

[0067] In existing lead screw drive technology, traditional lead screw drives use a rotary motor connected to the lead screw via a coupling. The rotation of the lead screw drives the slider to move the load linearly. Due to the existence of various mechanical links between the motor and the load, the accuracy is inevitably directly affected, that is, there is a movement gap during the movement, which cannot be completely eliminated.

[0068] This application uses direct drive, and the mover sleeve 11 and output shaft 12 in the mover motion shaft 4 are rigidly guided. That is, after the coil is energized, it directly drives the load to move linearly, eliminating intermediate transmission machinery, eliminating backlash, reducing vibration and noise, and thus reducing control and adjustment links, which can ensure better performance than lead screw adjustment.

[0069] In order to achieve the reciprocating motion of the moving shaft 4, specifically, the magnetic field generated by the energized stator 5 interacts with the magnetic field generated by the moving sleeve 11, causing the moving sleeve 11 to move axially along the side wall of the guide post 3 along the guide sleeve 10. At this time, since the moving sleeve 11 is fixedly connected to the output shaft 12 (e.g., an integrated design), the output shaft 12 can extend or retract from the outer shell 1. At the same time, the rigid integrated design of the moving sleeve 11 and the output shaft 12 makes the mechanism compact and small in size.

[0070] Preferably, the stator ring sleeve 9 and the mover sleeve 11 are in clearance fit. That is, the inner sidewall of the stator frame 14 is in clearance fit with the mover sleeve 11.

[0071] This design is to prevent the inner wall of the stator ring sleeve 9 (and stator frame 14) from rubbing against the outer wall of the mover sleeve 11, which would cause noise and damage the components and reduce their service life.

[0072] Furthermore, the size of the air gap is a predetermined interval that is responsible for the transmission of the magnetic field. The size of this interval (technically known as the air gap) directly affects the magnetic flux density, so it cannot be too large or too small. A specific, detailed range is not available and must be determined based on a comprehensive consideration of the motor's performance. For example, a larger motor can have an air gap of 1 mm, while a smaller motor generally has a smaller air gap, such as 0.5 mm or 0.3 mm.

[0073] Preferably, a support portion 13 is provided on the outer side of the guide sleeve 10, and the surface of the support portion 13 abuts against the lower end face of the mover sleeve 11.

[0074] The support part 13 makes the movement sleeve 11 more stable when it extends and retracts.

[0075] Preferably, the stator 5 further includes a stator frame 14 coaxially arranged with the mover shaft 4, and the stator frame 14 is positioned and connected to the inner wall of the outer shell 1; a fixing area 19 is provided on the outer peripheral surface of the upper end of the stator frame 14, and the top end of the stator frame 14 is located in the through hole 6, and the stator ring 9 is sleeved on the outside of the fixing area 19; the lower end of the stator frame 14 is positioned and connected to the upper surface of the base 2, and when viewed from the longitudinal section of the outer shell 1, the enclosed cavity is arranged along the axial direction of the stator frame 14 and passes through the lower end of the stator frame 14; a limiting through hole 20 is coaxially opened at the upper end of the stator frame 14 corresponding to the upper end of the mover shaft 4.

[0076] The upper outer circumferential surface of the stator frame 14 is provided with a fixing area 19, and the top end of the stator frame 14 is located inside the through hole 6. This means that after the fixing area 19 is provided on the upper outer circumferential surface of the stator frame 14, the diameter of the top end of the stator frame 14 exactly matches the inner diameter of the through hole 6. For details, please refer to [reference needed]. Figure 2 .

[0077] The portion of the enclosed chamber that passes through the stator frame 14 can be referred to as cavity 17. That is, the subsequent third sensor 15 is preferably located here, and the stator frame can be optionally set as a coil frame.

[0078] The stator frame 14 can fix the position of the stator ring 9, so that the stator ring 9 will not easily wobble. At the same time, the cavity 17 is set to ensure that the output shaft 12 will not be incomplete when it retracts.

[0079] Multiple stator frames 14 can be configured, each of which is placed vertically and arranged around the guide sleeve 10.

[0080] References can also be set. Figure 7 and Figure 8 The stator frame 14 is a cylindrical structure, and the specific configuration is determined according to the requirements during use.

[0081] The length of the fixed area 19 is the same as that of the stator ring 9. The limiting through hole 20 is used to limit the upper end of the mover shaft 4 to prevent the upper end of the mover shaft 4 from shaking. At the same time, the upper inner wall of the stator frame 14 is used to axially limit the upper end of the mover shaft 4 to prevent the upper end of the mover shaft 4 from sliding out of the through hole 6.

[0082] Preferably, the outer peripheral surface of the stator frame 14 is provided with a receiving groove 18, and a position sensor is installed in the receiving groove 18.

[0083] Specifically, a first embodiment is provided for a position sensor:

[0084] The position sensor can be a third sensor 15 installed in the receiving groove 18; at the same time, in order to enable the third sensor 15 to perform reading operations, a fourth sensor 16 is provided on the outer side of the guide sleeve 10 at the position corresponding to the third sensor 15.

[0085] The relationship between the fourth sensor 16 and the third sensor 15: The third sensor 15 is responsible for acquiring and processing signals, while the fourth sensor 16 provides the signal data required for measurement. There is relative motion between the third sensor 15 and the fourth sensor 16, that is, the third sensor 15 is fixed and the fourth sensor 16 is installed on the moving body (i.e., the guide sleeve 10). The third sensor 15 acquires signals from different positions of the fourth sensor 16 and transmits the acquired signals to the control system to realize position feedback and precision control.

[0086] A second embodiment is also provided for the position sensor: see reference Figure 9 Compared to the first embodiment, this embodiment places the position sensor at the bottom of the guide sleeve 10, eliminating the need for slots on the stator frame 14, thus further improving the strength of the stator frame 14.

[0087] The position sensor (which can be a contact type, an inductive type, etc., depending on the requirements) includes a first sensor 21 installed at the bottom of the guide sleeve 10; in order to fully respond to the first sensor 21, a second sensor 22 corresponding to the first sensor 21 is provided on the lower periphery of the guide post 3.

[0088] It should be noted that traditional voice coil modules (i.e., existing technology) mostly use rectangular guide rails with the guide rails offset from the drive shaft. The drawback is that the size is too large due to the offset of the guide rails. In contrast, the stator 5, mover shaft 4 and guide post 3 provided in this application have good compactness and rigidity after assembly. At the same time, the stator 5, mover shaft 4 and guide post 3 are coaxially arranged, which can effectively reduce Abbe error and improve accuracy.

[0089] It should be noted that the second embodiment and the first embodiment of the position sensor can be used independently (e.g., Figure 9 and Figure 10 ), can also be used together (e.g. Figure 5 ).

[0090] Furthermore, another embodiment of the polyhedral guided voice coil motor is provided: (i.e., the second embodiment of the polyhedral guided voice coil motor).

[0091] In this embodiment, reference is made to Figure 11 In the second embodiment of the motor, the upper end of the second housing 101 has only one through-hole 601 (i.e., the diameter of the through-hole 601 is smaller than that of the through-hole 6). During assembly, the second stator ring 901 is disposed on the upper end of the second housing 101 and abuts against the upper end of the second housing 101. A corresponding opening is also provided on the second stator ring 901 at the position corresponding to the through-hole 601, allowing the upper end of the mover shaft 4 (i.e., the output shaft 12) to pass through. A fixing area 19 is provided on the outer circumferential surface of the upper end of the stator frame 14 for fixing the second stator ring 901. The lower end of the stator frame 14 is connected to the base.

[0092] Assembly can be completed by sequentially connecting the moving sleeve 11, the second guide sleeve 1001, and the guide post from the outside to the inside.

[0093] Referring to the first embodiment of the polyhedral guided voice coil motor, the difference in the second embodiment is:

[0094] The second outer shell 101, the through port 601, the second stator ring 901, and the second guide sleeve 1001, that is, the second guide sleeve 1001 has no support part 13 on the outside, and the upper end of the second stator ring 901 does not extend out of the through port 601.

[0095] The advantage of this embodiment is that the smaller diameter of the through-hole 601 provides better sealing to the output shaft 12 compared to the through-hole 6.

[0096] Working principle: Refer to Figure 2 The following description uses a first embodiment of a polyhedral guided voice coil motor as an example. Assembly is completed by sequentially connecting the stator 5, the mover shaft 4, and the guide post 3 from the outside in. The assembly process requires low precision. During use, the magnetic field generated by the energized stator 5 interacts with the magnetic field generated by the mover shaft 4, producing a regular linear motion (refer to a magnetic shuttle for details). The magnitude of the driving force is controlled by changing the magnitude of the energizing current, and the direction of motion is controlled by changing the direction of the energizing current. Throughout the operation, the guide post 3, through the cooperation of the limiting surface 8 and the positioning surface 7, restricts the rotation of the mover shaft 4 around the guide post 3, preventing vibration during the reciprocating motion of the mover shaft 4. Simultaneously, this design, where the mover shaft 4 and the guide post 3 simultaneously achieve guidance and motion operations, demonstrates high integration and reduces the size of the equipment.

[0097] The reciprocating motion of the moving shaft 4 is specifically as follows: the magnetic field generated by the energization of the stator 5 interacts with the magnetic field generated by the moving sleeve 11, causing the moving sleeve 11 to move axially along the side wall of the guide post 3 along the guide sleeve 10. At this time, the moving sleeve 11 is fixedly connected to the output shaft 12 (e.g., an integrated design), which allows the output shaft 12 to extend or retract from the outer shell 1. At the same time, the rigid integrated design of the moving sleeve 11 and the output shaft 12 makes the mechanism compact and small in size.

[0098] The above embodiments are only for illustrating the technical concept and features of this utility model, and are intended to enable those skilled in the art to understand the content of this utility model and implement it accordingly. They should not be construed as limiting the scope of protection of this utility model. All equivalent changes or modifications made in accordance with the spirit and essence of this utility model should be included within the scope of protection of this utility model.

Claims

1. A multi-faceted guide voice coil motor, characterized in that: It includes a housing (1) and a moving shaft (4), a guide post (3) and a base (2) assembled in order from top to bottom. The base (2) is assembled at the bottom of the outer shell (1) to form a closed chamber inside the outer shell (1); In the enclosed chamber, the guide post (3) is coaxially arranged with the moving shaft (4), the upper end of the guide post (3) is inserted into the lower end of the moving shaft (4) and extends into the interior of the moving shaft (4), and the lower end of the guide post (3) is positioned on the base (2). The upper end of the outer shell (1) is coaxially provided with a through hole (6) corresponding to the upper end of the moving shaft (4). The moving shaft (4) has two states: extending upward and retracting downward. In the extended state, the upper end of the moving shaft (4) extends out through the hole (6). The guide post (3) has a limiting surface (8) arranged along the axial direction. The inside of the moving shaft (4) is provided with a positioning surface (7) that cooperates with the limiting surface (8). Through the cooperation between the limiting surface (8) and the positioning surface (7), the moving shaft (4) is restricted from rotating around the guide post (3). The polyhedral guide voice coil motor also includes a stator (5), which is sleeved on the inner wall of the closed chamber and is correspondingly arranged with the moving shaft (4); The stator (5) includes a stator ring (9) fixedly installed on the inner side wall of the closed cavity. The stator ring (9) serves as the magnetic field driving part for the axial reciprocating motion of the mover shaft (4).

2. The polyhedral guide voice coil motor according to claim 1, characterized in that: The moving shaft (4) includes a guide sleeve (10) and a moving sleeve (11) that are coaxially assembled. The guide sleeve (10) is coaxially sleeved on the guide post (3), and the upper end of the guide sleeve (10) is inserted into the lower end of the moving sleeve (11) for positioning. The positioning surface (7) is set on the inner side of the guide sleeve (10). The upper end of the moving sleeve (11) has an output shaft (12) for extending out of the through hole (6).

3. The polyhedral guide voice coil motor according to claim 2, characterized in that: The stator ring (9) and the moving ring (11) are fitted with a clearance.

4. The polyhedral guide voice coil motor according to claim 2, characterized in that: The outer side of the guide sleeve (10) is provided with a support part (13), and the surface of the support part (13) abuts against the lower end face of the moving sleeve (11).

5. The polyhedral guided voice coil motor according to claim 1, characterized in that: The stator (5) also includes a stator frame (14) coaxially arranged with the mover shaft (4), and the stator frame (14) is positioned and connected to the inner wall of the outer shell (1); The upper outer circumferential surface of the stator frame (14) is provided with a fixing area (19), and the top of the stator frame (14) is located in the through hole (6), and the stator ring (9) is sleeved on the outside of the fixing area (19). The lower end of the stator frame (14) is positioned and connected to the upper surface of the base (2). When viewed from the longitudinal section of the outer shell (1), the enclosed chamber is arranged along the axial direction of the stator frame (14) and passes through the lower end of the stator frame (14). The upper end of the stator frame (14) is coaxially provided with a limit hole (20) corresponding to the upper end of the mover motion shaft (4).

6. The polyhedral guide voice coil motor according to claim 5, characterized in that: The stator frame (14) has a receiving groove (18) on its outer peripheral surface, and a position sensor is installed in the receiving groove (18).

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