Miniature clutch device based on magnetic circuit control

Abstract

The utility model discloses a miniature clutch device based on magnetic circuit control, which comprises an input end coil, an output end coil, a rotating piece, a hard magnetic clutch sliding block, a clutch connector and a self-locking piece, the clutch connector is provided with a joint groove, and the self-locking piece comprises a permanent magnet piece and a locking piece used for magnetic isolation. A mounting groove communicated with the joint groove is formed in the circumferential groove wall in the joint groove, the locking piece is movably assembled in the mounting groove, and the output end coil is sequentially electrified to form two magnetic fields in opposite directions to be respectively applied to the permanent magnet piece; the hard magnetic clutch sliding block is driven to be switched between a separation position where the hard magnetic clutch sliding block is prevented from being connected with the connecting groove and a connecting position where the hard magnetic clutch sliding block is allowed to be connected with the connecting groove, and at least a magnetic field formed by electrifying the input end coil is applied to the hard magnetic clutch sliding block, so that the hard magnetic clutch sliding block extends out when the locking piece is switched to the connecting position; in this way, the clutch function is achieved through electromagnetic interaction, the working current is small, and the electromagnetic clutch is applied to the harsh environment.

Description

TECHNICAL FIELD

[0001] The utility model relates to clutch technical field, especially relates to a micro clutch device based on magnetic circuit control. BACKGROUND

[0002] At present, most micro clutches adopt motor or electromagnet to realize driving, wherein the waterproof effect of motor driving is poor, easy to cause metal contact corrosion, and cannot be applied to severe environment.

[0003] In addition, the electromagnet driving mode cannot be self-locked, and when strong mechanical vibration is encountered, the micro clutch is easy to appear abnormal engagement phenomenon, that is, the reliability and shock resistance of such micro clutch are poor. SUMMARY

[0004] Therefore, the utility model provides a micro clutch device based on magnetic circuit control to solve the above problems, which can be used in severe environment, has small working current, and can realize clutch function through electromagnetic interaction.

[0005] To achieve the above purpose, the utility model provides the technical scheme as follows:

[0006] The utility model provides a micro clutch device based on magnetic circuit control, including input end coil, output end coil, clutch slider assembly, clutch adapter and self locking piece, the clutch slider assembly includes rotating part and the hard magnetic clutch slider of slidable assembly in the rotating part, and the hard magnetic clutch slider with the rotating part is configured as synchronous rotation, the rotating part with the clutch adapter is spaced from each other, the clutch adapter is provided with the engagement groove that cooperation hard magnetic clutch slider in the one end of rotating part, and at least one side opening of the engagement groove faces the rotating part, the self locking piece includes permanent magnet and the locking piece for magnetic separation, the permanent magnet is assembled in the one side of the locking piece away from the rotating part, the circumferential groove wall in the engagement groove is provided with the installation groove that contains the locking piece, the installation groove is connected with the engagement groove, and the locking piece is movably assembled in the installation groove, the output end coil is sequentially electrified to form two opposite direction magnetic field and is applied to the permanent magnet respectively to drive the locking piece switches between the separation position of the hard magnetic clutch slider that blocks the engagement groove and the engagement position that allows the hard magnetic clutch slider to engage the engagement groove, at least the magnetic field that input end coil is electrified is applied to the hard magnetic clutch slider to make the hard magnetic clutch slider extend when the locking piece switches to the engagement position and is engaged in the clutch adapter.

[0007] Further, the installation slot is provided with a central rotating shaft, the locking piece is provided with a central installation hole matched with the central rotating shaft and a side installation hole matched with the permanent magnet, the side installation hole is a one-way opening and the opening direction thereof is away from the rotating piece, the central rotating shaft is inserted into the central installation hole so that the locking piece is rotatably assembled in the installation slot, and the permanent magnet is assembled in the side installation hole.

[0008] Further, the rotating piece is provided with a guide sliding groove opening towards the side of the clutch adapter, and the hard magnetic clutch sliding block is slidably assembled in the guide sliding groove.

[0009] Further, the locking piece comprises two oppositely arranged straight edge portions and arc-shaped portions respectively located at two ends of the straight edge portions, the circumferential groove wall of the installation slot comprises a first arc-shaped wall and a second arc-shaped wall oppositely arranged and an abutting wall located between the first arc-shaped wall and the second arc-shaped wall, the outer shape of the straight edge portion matches the circumferential groove wall of the engagement groove, the first arc-shaped wall and the second arc-shaped wall are arranged in gaps with the corresponding arc-shaped portions respectively, and the arc length of the first arc-shaped wall is greater than that of the second arc-shaped wall, and the abutting wall is used for limiting the locking piece so that the locking piece is rotatably switched between the separation position and the engagement position.

[0010] Further, the locking piece is a magnetically isolated metal piece.

[0011] Further, the clutch adapter is provided with a soft magnetic core.

[0012] Further, the input end coil is arranged at one end of the rotating piece away from the clutch adapter, and the output end coil is arranged at one end of the clutch adapter away from the rotating piece.

[0013] Further, the utility model also comprises a shell, the input end coil, the output end coil, the rotating piece and the clutch adapter are arranged in the shell, and the rotating piece and the clutch adapter are rotatably arranged in the shell respectively.

[0014] The technical scheme provided by the utility model has the following beneficial effects:

[0015] The input end coil, the output end coil, the clutch sliding block assembly, the clutch adapter and the self-locking piece are cooperated to ensure that the clutch function is realized through electromagnetic interaction, the structure of the utility model is simple and the metal contact corrosion problem can be avoided, the utility model can be used in a severe environment, the working current of the utility model is small, and the utility model is suitable for power transmission control of a miniature machine.BRIEF DESCRIPTION OF DRAWINGS BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 A structural schematic diagram of a micro clutch device based on magnetic circuit control in an embodiment is shown.

[0017] Figure 2 An exploded view of a micro clutch device based on magnetic circuit control in an embodiment is shown.

[0018] Figure 3 A first perspective view of a micro clutch device based on magnetic circuit control in an embodiment is shown.

[0019] Figure 4 A second perspective view of a micro clutch device based on magnetic circuit control in an embodiment is shown.

[0020] Figure 5 A schematic diagram of a self-locking piece in an embodiment is shown.

[0021] Figure 6 A schematic diagram of a hard magnetic clutch slider in an embodiment is shown. DETAILED DESCRIPTION

[0022] To further illustrate the embodiments, the utility model provides the accompanying drawings. These accompanying drawings are part of the utility model disclosure, which mainly serves to illustrate the embodiments, and can be used to explain the operating principle of the embodiments in conjunction with the related description of the specification. With reference to these contents, those skilled in the art should be able to understand other possible embodiments and the advantages of the utility model. The components in the drawings are not drawn to scale, and similar component symbols are usually used to represent similar components.

[0023] The utility model will be further illustrated in conjunction with the accompanying drawings and specific embodiments.

[0024] Reference Figures 1 to 6 As shown, the present embodiment provides a micro clutch device based on magnetic circuit control (hereinafter referred to as micro clutch device) for the power transmission control of micro mechanical.

[0025] As Figure 1 , Figure 2 and Figure 3 shown, the micro clutch device of the present embodiment includes an input end coil 2, an output end coil 7, a clutch slider assembly, a clutch adapter 6, and two self-locking pieces 5. Of course, in other embodiments, the number of self-locking pieces 5 can also be 1 or more than 3.

[0026] The specific clutching slider assembly comprises a rotating member 3 and a hard magnetic clutching slider 4 slidably assembled in the rotating member 3, and the hard magnetic clutching slider 4 and the rotating member 3 are configured to rotate synchronously, so that the hard magnetic clutching slider 4 can slide left and right on the rotating member 3, and the rotating member 3 can drive the hard magnetic clutching slider 4 to rotate synchronously, thereby driving the clutching adapter 6 to rotate to transmit power when the clutching adapter 6 is in the engaged position.

[0027] The rotating member 3 and the clutching adapter 6 are arranged at a distance from each other, and the clutching adapter 6 is provided with an engaging groove 61 matching the hard magnetic clutching slider 4 in the left end of the rotating member 3, and the left side opening of the engaging groove 61 faces the rotating member 3. Specifically, the rotating member 3 is provided with an inwardly recessed guide sliding groove 31, and the opening of the guide sliding groove 31 faces the right side. The hard magnetic clutching slider 4 is slidably assembled in the guide sliding groove 31. The cross-sectional shape of the hard magnetic clutching slider 4 is hexagonal, and the cross-sectional shape of the circumferential groove wall in the guide sliding groove 31 and the engaging groove 61 respectively matches the cross-sectional shape of the hard magnetic clutching slider 4, so that the outer circumferential surface of the hard magnetic clutching slider 4 is limited by the guide sliding groove 31, i.e. the hard magnetic clutching slider 4 is limited to freely rotate in the circumferential direction in the guide sliding groove 31, thereby ensuring that the hard magnetic clutching slider 4 and the rotating member 3 can rotate synchronously. Of course, in other embodiments, the cross-sectional shape of the hard magnetic clutching slider 4 can also be triangular or quadrangular or other polygonal shapes.

[0028] As shown in Figure 5 Each self-locking member 5 comprises a permanent magnet 51 and a locking member 52 for magnetic isolation. The permanent magnet 51 is assembled on the right side of the corresponding locking member 52. The circumferential groove wall in the engaging groove 61 is provided with a mounting groove 62 for accommodating the locking member 52. The mounting groove 62 is in communication with the engaging groove 61. The locking member 52 is movably assembled in the mounting groove 62. At this time, the permanent magnet 51 is located between the locking member 5 and the bottom groove wall of the mounting groove 62.

[0029] As shown in Figure 1 The input end coil 2 is arranged at the left end of the rotating member 3 away from the clutching adapter 6, and the output end coil 7 is arranged at the right end of the clutching adapter 6 away from the rotating member 3.

[0030] The output end coil 7 is sequentially energized to form two magnetic fields in opposite directions, which are respectively applied to the permanent magnets 51 to drive the locking members 52 to switch between the separation position of blocking the hard magnetic clutching slider 4 from engaging the engaging groove 61 and the engagement position of allowing the hard magnetic clutching slider 4 to engage the engaging groove 61. At least the magnetic field formed by energizing the input end coil 2 is applied to the hard magnetic clutching slider 4 to make the hard magnetic clutching slider 4 extend and engage the clutching adapter 6 when the locking member 52 switches to the engagement position. Therefore, the micro clutching device does not have metal contacts, which can avoid the corrosion problem of metal contacts, and the structure is simple and reliable.

[0031] As shown in Figure 4As shown, when the output coil 7 is connected with the current in the first direction and forms the first magnetic field, the first magnetic field drives the self-locking piece 5 to move in the first movement direction to the engagement position, at this time the locking piece 52 no longer extends into the engagement slot 61, that is, the locking piece 52 no longer blocks the hard magnetic clutch slider 4, so as to allow the hard magnetic clutch slider 4 to engage the clutch adapter 6 to complete the engagement position.

[0032] When the output coil 7 is connected with the current in the second direction opposite to the first direction and forms the second magnetic field, the second magnetic field drives the self-locking piece 5 to move in the second movement direction opposite to the first movement direction to the disengagement position, at this time the locking piece 52 extends into the engagement slot 61 to block the hard magnetic clutch slider 4 from being inserted into the engagement slot 61 of the clutch adapter 6, thereby ensuring that the clutch adapter 6 and the rotating piece 3 cannot be connected in transmission at all, that is, the disengagement position is maintained.

[0033] When the input coil 2 is connected with the current in the third direction and forms the third magnetic field, the third magnetic field drives the hard magnetic clutch slider 4 to extend or slide towards the clutch adapter 6, and the first magnetic field drives the self-locking piece 5 to move to the engagement position, so that the hard magnetic clutch slider 4 directly inserts into the engagement slot 61 without being blocked by the locking piece 52, and engages with the clutch adapter 6 to complete the engagement position action.

[0034] When the input coil 2 is connected with the current in the fourth direction opposite to the third direction and forms the fourth magnetic field, the fourth magnetic field drives the hard magnetic clutch slider 4 to move away from the clutch adapter 6 and retract into the rotating piece 3 to complete the disengagement position action.

[0035] Through the cooperation of the input coil 2, the output coil 7, the clutch slider assembly, the clutch adapter 6 and the self-locking piece 5, the clutch function is realized through electromagnetic interaction, and the structure of the embodiment is simple and can avoid the corrosion problem of metal contacts, so that it can be used in harsh environments, and the working current is small, so it is suitable for power transmission control of micro-machines.

[0036] Of course, the magnetic field formed by the energization of the input coil 2 and the output coil 7 can also act on the hard magnetic clutch slider 4 to drive the hard magnetic clutch slider 4 to engage the clutch adapter 6.

[0037] In another preferred embodiment, as shown in Figure 1 and Figure 5 Each mounting slot 62 is provided with a central rotating shaft 621, each locking piece 52 is provided with a central mounting hole 521 matched with the central rotating shaft 621 and a side mounting hole 522 matched with the permanent magnet 51, the side mounting hole 522 is a one-way opening, and the opening direction of the side mounting hole 522 is away from the rotating piece 3, that is, each side mounting hole 522 is only opened to the right side, and the permanent magnet 51 is assembled in the side mounting hole 522.

[0038] The center rotating shaft 621 is inserted into the center mounting hole 521, so that the locking member 52 is rotatably assembled in the mounting groove 62.

[0039] In addition, the locking member 52 is a magnetic isolation metal member, such as a copper metal locking member, the permanent magnet 51 is located on the side of the locking member 52 away from the input coil 2, and each side mounting hole 522 is only open to the right side, so as to ensure that the magnetic field formed by the input coil 2 and the magnetic field formed by the hard magnetic clutch slider 4 are all isolated by the locking member 52, thereby ensuring that the permanent magnet 51 is only limited by the magnetic field formed by the output coil 7, that is, the magnetic field formed by the input coil 2 and the magnetic field formed by the hard magnetic clutch slider 4 cannot act on the permanent magnet 51, so the input coil 2 and the hard magnetic clutch slider 4 cannot affect the rotation of the self-locking member 5.

[0040] Further, as shown in Figure 4 and Figure 5 Each locking member 52 includes two oppositely arranged straight edge portions and arc-shaped portions 525 located at both ends of the straight edge portions, and the straight edge portion of the locking member 52 close to the engagement groove 61 is defined as the first straight edge portion 523, and the other straight edge portion of the locking member 52 away from the engagement groove 61 is defined as the second straight edge portion 524.

[0041] As shown in Figure 4 Figure 5 The circumferential groove wall of the mounting groove 62 includes oppositely arranged first and second arc-shaped walls 622 and 623 and an abutting wall 624 located between the first and second arc-shaped walls 622 and 623, the first straight edge portion 523 matches the circumferential groove wall of the engagement groove 61, the first and second arc-shaped walls 622 and 623 are respectively arranged in gaps with the corresponding arc-shaped portions 525, and the arc length of the first arc-shaped wall 622 is greater than that of the second arc-shaped wall 623, so as to ensure that the mounting groove 62 has sufficient rotating space for the locking member 52 to rotate between the disengaged position and the engaged position.

[0042] And the abutting wall 624 is used to limit the locking member 52, so that the locking member 52 rotates between the disengaged position and the engaged position.

[0043] When the self-locking member 5 rotates in the first magnetic field in the first movement direction, the end of the second straight edge portion 524 close to the second arc-shaped wall 623 abuts against the abutting wall 624, so as to limit the self-locking member 5 from continuing to rotate in the first movement direction, and to keep the self-locking member 5 stationary, at this time, the first straight edge portion 523 rotates and retracts into the mounting groove 62, and the locking member 52 no longer extends into the engagement groove 61, that is, the self-locking member 5 moves to the engaged position, at this time, the locking member 52 no longer extends into the engagement groove 61, that is, the locking member 52 no longer blocks the hard magnetic clutch slider 4, so as to allow the hard magnetic clutch slider 4 to insert into the engagement groove 61 and engage the clutch adapter 6, so as to complete the engagement.

[0044] When the self-locking piece 5 rotates in the second movement direction in the second magnetic field, the second straight edge 524 abuts against the abutting wall 624 near the end of the first arc-shaped wall 622, so as to limit the self-locking piece 5 from rotating in the second movement direction and keep the self-locking piece 5 stationary, at this time, the first straight edge 523 rotates and turns out of the mounting groove 62, and the locking piece 52 partially extends into the engaging groove 61, that is, the self-locking piece 5 moves to the separation position, the locking piece 52 blocks the hard magnetic clutched slider 4 from entering the engaging groove 61, so as to block the hard magnetic clutched slider 4 from extending towards the clutched adapter 6, thereby ensuring that the clutched adapter 6 and the rotating piece 3 cannot be engaged all the time, that is, the separation position is kept.

[0045] In summary, when the self-locking piece 5 is in the first magnetic field or the second magnetic field formed by the energization of the output end coil 7, each permanent magnet 51 generates rotation in different directions under the electromagnetic action of the first magnetic field or the second magnetic field, thereby driving the locking piece 52 to rotate correspondingly, and finally realizing the rotation switching of the locking piece 52 between the separation position and the engaging position.

[0046] More specifically, the micro clutch device of the embodiment further comprises a shell 1 and a total control system, the input end of the input end coil 2 and the output end coil 7 are respectively electrically connected to the output end of the total control system, so as to control the on-off and current direction of the input end coil 2 and the output end coil 7.

[0047] The input end coil 2, the output end coil 7, the rotating piece 3 and the clutched adapter 6 are all arranged in the shell 1, and the rotating piece 3 and the clutched adapter 6 are respectively arranged to be rotatable in the shell 1.

[0048] In another preferred embodiment, the clutched adapter 6 is provided with a soft magnetic core.

[0049] When the hard magnetic clutched slider 4 has been engaged with the clutched adapter 6, the input end coil 2 and the output end coil 7 are synchronously de-energized by the total control system, and since the hard magnetic clutched slider 4 itself has hard magnetism, the hard magnetic clutched slider 4 and the soft magnetic core of the clutched adapter 6 are magnetically attracted, so as to make the hard magnetic clutched slider 4 be adsorbed on the clutched adapter 6, thereby ensuring that the rotating piece 3 and the clutched adapter 6 are stably engaged, that is, the engaging position is kept.

[0050] When the hard magnetic clutched slider 4 has been retracted into the rotating piece 3, if the input end coil 2 and the output end coil 7 are de-energized or have no current, and the whole micro clutch device is in strong vibration, since the permanent magnet 51 and the soft magnetic core of the clutched adapter 6 are magnetically attracted, the permanent magnet 51 and the locking piece 52 always keep a stationary state and are in the initial separation position, so as to ensure that the hard magnetic clutched slider 4 is blocked by the self-locking piece 5 and cannot be inserted into the engaging groove 61 or cannot be engaged with the clutched adapter 6, that is, the micro clutch device always keeps in the separation position by the blocking effect of the self-locking piece 5, thereby forming a self-locking function.

[0051] Therefore, when the micro clutch encounters strong mechanical shock, even if the input coil 2 and the output coil 7 are powered off, abnormal engagement phenomenon will not occur due to the self-locking function, so as to ensure the reliability and good shock resistance of the micro clutch.

[0052] Of course, when the micro clutch switches from the engaged position to the disengaged position, the magnetic force between the magnetic field formed by the input coil 2 and the output coil 7 and the hard magnetic clutch slider 4 needs to overcome the magnetic force limit between the hard magnetic clutch slider 4 and the soft magnetic core of the clutch adapter 6, so as to ensure that the hard magnetic clutch slider 4 is pulled back to the guide groove 31 to the left, away from the engagement groove 61.

[0053] Although the utility model is specifically shown and introduced in combination with the preferred embodiments, it should be understood by those skilled in the art that various changes can be made to the utility model in form and details without departing from the spirit and scope of the utility model defined in the appended claims, and all of them are within the protection scope of the utility model.

Claims

1. A micro clutch device based on magnetic circuit control, characterized by: The clutching device comprises an input coil, an output coil, a clutching slider assembly, a clutching adapter and a self-locking part. The clutching slider assembly comprises a rotating part and a hard magnetic clutching slider which is slidably assembled in the rotating part, and the hard magnetic clutching slider and the rotating part are configured to rotate synchronously. The rotating part and the clutching adapter are arranged at a distance from each other, and an engaging groove which matches the hard magnetic clutching slider is arranged in one end of the clutching adapter which faces the rotating part, and at least one side of the engaging groove is open towards the rotating part. The self-locking part comprises a permanent magnet and a locking part for magnetic isolation, and the permanent magnet is assembled on the side of the locking part which is away from the rotating part. A circumferential groove wall in the engaging groove is provided with a mounting groove which accommodates the locking part, the mounting groove is communicated with the engaging groove, and the locking part is movably assembled in the mounting groove; the output coil is sequentially energized to form two magnetic fields in opposite directions which are respectively applied to the permanent magnet, so as to drive the locking part to switch between a separation position which blocks the hard magnetic clutching slider from engaging the engaging groove and an engaging position which allows the hard magnetic clutching slider to engage the engaging groove. At least the input coil is energized to form a magnetic field which is applied to the hard magnetic clutching slider, so that the hard magnetic clutching slider is extended and engaged with the clutching adapter when the locking part switches to the engaging position.

2. The magnetic circuit control based micro clutch device according to claim 1, wherein: The mounting groove is provided with a central rotating shaft, the locking part is provided with a central mounting hole which matches the central rotating shaft and a side mounting hole which matches the permanent magnet; the side mounting hole is unidirectionally open, and the opening direction thereof is away from the rotating part; the central rotating shaft is inserted into the central mounting hole, so that the locking part is rotatably assembled in the mounting groove; and the permanent magnet is assembled in the side mounting hole.

3. The magnetic circuit control based micro clutch device according to claim 2, wherein: The rotating part is provided with a guide sliding groove which is open towards the side of the clutching adapter, and the hard magnetic clutching slider is slidably assembled in the guide sliding groove; the cross-sectional shape of the hard magnetic clutching slider is polygonal, and the cross-sectional shapes of the circumferential groove walls in the guide sliding groove and the engaging groove respectively match the cross-sectional shape of the hard magnetic clutching slider.

4. The magnetic circuit control based micro clutch device according to claim 3, wherein: The locking part comprises two oppositely arranged straight edge portions and two arc-shaped portions which are respectively located at the two ends of the straight edge portions, the circumferential groove wall of the mounting groove comprises a first arc-shaped wall and a second arc-shaped wall which are oppositely arranged and an abutting wall which is located between the first arc-shaped wall and the second arc-shaped wall; the outer shape of the straight edge portion matches the circumferential groove wall of the engaging groove; the first arc-shaped wall and the second arc-shaped wall are arranged at a gap from the corresponding arc-shaped portions, and the arc length of the first arc-shaped wall is greater than the arc length of the second arc-shaped wall; and the abutting wall is used to limit the locking part, so that the locking part is rotatably switched between the separation position and the engaging position.

5. The micro-clutch device based on magnetic circuit control according to any one of claims 1-4, characterized in that: The locking part is a magnetic isolation metal part.

6. The micro-clutch device based on magnetic circuit control according to any one of claims 1-4, characterized in that: The clutching adapter is provided with a soft magnetic core.

7. The micro-clutch device based on magnetic circuit control according to any one of claims 1-4, characterized in that: The input coil is arranged at one end of the rotating part which is away from the clutching adapter, and the output coil is arranged at one end of the clutching adapter which is away from the rotating part.

8. The micro-clutch device based on magnetic circuit control according to any one of claims 1-4, characterized in that: Also include a shell; the input coil, the output coil, the rotating part and the clutch adapter are all arranged in the shell, and the rotating part and the clutch adapter are respectively arranged as rotatable in the shell.

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