Magnetic suspension driving mechanism with guiding and limiting functions

Abstract

The utility model relates to a magnetic suspension driving mechanism with guiding and limiting functions, which is characterized in that a permanent magnet is connected with one end of a swing mechanism, the permanent magnet and an electromagnetic component are arranged at an interval, the swing mechanism can move horizontally and is connected in a base in an automatic resetting manner, and the other end of the swing mechanism is used for driving a workpiece; when the electromagnetic assembly drives the permanent magnet to do linear motion, the swing mechanism can synchronously and horizontally move, and when the current direction in the electromagnetic assembly is changed, the reset acting force of the swing mechanism can synchronously push the permanent magnet to do reverse linear motion, so that the swing mechanism swings back and forth in the base relative to the electromagnetic assembly. The utility model has the beneficial effects that the permanent magnet and the electromagnetic component are arranged at intervals, and the permanent magnet is driven by the magnetic field to linearly move and drive the swing mechanism to horizontally move, so that the swing mechanism is prevented from being directly mechanically connected with a power source, the frictional resistance of mechanical connection can be effectively reduced, and the working noise and the vibration sense are reduced; and the handheld holding feeling and the use comfort of the hair trimming tool are obviously improved.

Description

Technical Field

[0001] The utility model relates to a power device, and more specifically to a magnetic levitation drive mechanism with guiding and limiting functions, which is mainly applied to the fields of reciprocating hair trimming tools such as shavers, hair clippers, and hair trimmers. Background Art

[0002] At present, during the use of reciprocating shavers, hair clippers or hair trimmers, the blades for shearing hair need to reciprocate at a high frequency to achieve hair trimming. The reciprocating motion needs to be realized by means of a motor and a transmission structure installed in the machine body. The existing transmission mechanism is basically a transmission wheel provided with an eccentric shaft. The output shaft of the motor drives the transmission wheel to rotate at a high speed, and the eccentric shaft on the transmission wheel sequentially and alternately repeatedly impacts two opposite surfaces on the knife holder, thereby pushing the knife holder to reciprocate horizontally, realizing the conversion of the rotational motion of the motor into a reciprocating motion.

[0003] Although this structure can achieve reciprocating motion, it needs to rely on the eccentric shaft on the transmission wheel to sequentially and alternately repeatedly impact the entities in two opposite directions on the knife holder. When the eccentric shaft rotates to the other two directions, the eccentric shaft will not contact the knife holder. In this way, it is equivalent that the power output by the motor can only drive the knife holder in two opposite directions, and when the eccentric shaft is in the other two directions, the motor will not do work on the knife holder, resulting in less utilization of the output power of the motor and a lower energy efficiency ratio. Secondly, since the rotational speed of the motor is at least above 3000 revolutions per minute, the working noise is relatively large and the vibration feeling is also relatively strong when the eccentric shaft drives the blade to reciprocate, correspondingly reducing the use comfort of reciprocating hair trimming tools such as shavers, hair clippers, and hair trimmers. Summary of the Utility Model

[0004] In order to solve the above technical problems, the utility model provides a magnetic levitation drive mechanism with guiding and limiting functions, which can not only improve the energy efficiency ratio, but also effectively reduce the working noise and vibration feeling of shavers, hair clippers or hair trimmers, and improve the use comfort of reciprocating hair cutting tools.

[0005] To solve the above technical problems, the technical solution adopted by the utility model is a magnetic levitation drive mechanism with guiding and limiting functions, including an electromagnetic component and at least one permanent magnet; the permanent magnet is connected to one end of the swing mechanism and is arranged at an interval from the electromagnetic component. The swing mechanism is horizontally displaceable and is connected in the base in a manner that can automatically reset, and the other end is used to drive the workpiece; when the electromagnetic component drives the permanent magnet to move linearly, the swing mechanism can horizontally displace synchronously, and when the direction of the current in the electromagnetic component changes, the reset force of the swing mechanism can synchronously push the permanent magnet to move linearly in the opposite direction, so that the swing mechanism forms a reciprocating swing relative to the electromagnetic component in the base.

[0006] Preferably, a reset mechanism is further included. The reset mechanism includes a guide member for guiding and limiting the swing mechanism, and an elastic member for driving the swing mechanism to automatically reset. Both ends of the guide member are fixed to the base, and the swing mechanism is connected to the guide member in a limited way and can horizontally displace along the guide member driven by the permanent magnet; the elastic member is between the base and the swing mechanism, and its elastic force can synchronously push the swing mechanism to move linearly in the reverse direction when the current direction of the electromagnetic component changes, so that the swing mechanism forms a reciprocating swing relative to the electromagnetic component in the base.

[0007] Preferably, the swing mechanism includes a main swing frame and a sub-swing frame. At least one of the main swing frame and the sub-swing frame is connected to the guide member and is fixedly arranged in the base and can horizontally displace along the guide member driven by the permanent magnet; the elastic member is arranged between the main swing frame and the sub-swing frame and the base so that the main swing frame and the sub-swing frame can automatically reset when the external force disappears; the permanent magnet is arranged at the bottom of one of the main swing frame or the sub-swing frame and is spaced from the electromagnetic component.

[0008] Preferably, through holes are provided on the main swing frame and the sub-swing frame. The guide member is in the shape of a cylindrical rod and passes through the through holes at both ends and is connected to the base respectively, so that the main swing frame and the sub-swing frame are fixedly arranged in the base and can horizontally displace; the elastic members are springs respectively sleeved outside the guide member and placed between the base and the main swing frame and the sub-swing frame; permanent magnets are respectively arranged at the bottoms of the main swing frame and the sub-swing frame, and the two permanent magnets move linearly in opposite directions under the electromagnetic force generated by the electromagnetic component.

[0009] Preferably, a linkage member is provided between the main swing frame and the sub-swing frame. A hinge hole is provided at the center of the linkage member and is connected to the base through a hinge shaft; linkage holes are respectively provided on both sides of the hinge hole in the linkage member. A driving shaft is provided on the main swing frame, and a linkage shaft is provided on the sub-swing frame. The driving shaft and the linkage shaft are respectively inserted into the linkage holes so that the main swing frame and the sub-swing frame swing synchronously in opposite directions.

[0010] Preferably, the linkage holes are long holes, the length of which is greater than the diameters of the driving shaft and the linkage shaft, and the width of which matches the diameters of the driving shaft and the linkage shaft, so that the sub-swing frame swings in the opposite direction to the main swing frame.

[0011] Preferably, the base includes a front wall and a rear wall which are oppositely arranged. The lower ends of the front wall and the rear wall are respectively fixed on both sides of the electromagnetic component so that the base and the electromagnetic component are connected to form an integral body. Limiting plates are respectively provided on both sides of the front wall and the rear wall to connect the front wall and the rear wall into one body. Both ends of the guide member are respectively fixed on the limiting plates so that the main swing frame and the sub-swing frame can be horizontally displaced and fixed in the base; the elastic member is sleeved outside the guide member, one end of which abuts against the limiting plate, and the other end abuts against the end faces of the main swing frame and the sub-swing frame.

[0012] Preferably, a reinforcement plate is provided between the ends of both sides of the front wall and the rear wall of the base, and a mounting plate is provided between the reinforcement plates. The mounting plate is provided with a positioning hole and mounting holes on both sides of the positioning hole. The linkage part is placed under the mounting plate and the hinge shaft is inserted into the positioning hole so that the linkage part is hinged and fixed to the mounting plate.

[0013] Preferably, the main swing frame and the auxiliary swing frame are non-metallic parts, which are connected to the metal block as a whole by bolts; the permanent magnets are magnetically connected to the bottom of the metal block respectively, and are located below the limit plate of the base, and the end portions of the permanent magnets and the metal block are flush with or extend beyond the outer side of the limit plate.

[0014] Preferably, the electromagnetic assembly includes a yoke and a coil formed by stacking several silicon steel sheets; fixing holes are respectively provided on both sides of the upper end of each silicon steel sheet so that the front wall and the rear wall of the base are detachably connected and fixed to the yoke; fastening holes are respectively provided on both sides of the lower end of each silicon steel sheet.

[0015] The beneficial effect of the utility model is that the permanent magnet and the electromagnetic component are arranged at intervals, and the magnetic field is used to drive the permanent magnet to move linearly and drive the swing mechanism to move horizontally, thus avoiding the direct mechanical connection between the swing mechanism and the power source, which can effectively reduce the friction resistance of the mechanical connection, reduce working noise and vibration, and significantly improve the hand-held grip and comfort of the shaver, shaver or hair clipper. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A three-dimensional structural diagram of a magnetic suspension drive mechanism with guide limit according to an embodiment of the utility model

[0017] Figure 2 This is a front view of the magnetic suspension drive mechanism with guide limiter according to the embodiment of the utility model.

[0018] Figure 3 for Figure 2 Sectional structure diagram at AA

[0019] Figure 4 The three-dimensional structure diagram of the main swing frame in the embodiment of the utility model

[0020] Figure 5 The three-dimensional structure diagram of the auxiliary swing frame in the embodiment of the utility model

[0021] Figure 6 for Figure 2 Cross-sectional structure diagram at the middle BB

[0022] Figure 6a This is a structural diagram of the main swing frame and the auxiliary swing frame driving the workpiece separately in the embodiment of the utility model

[0023] Figure 7 A three-dimensional structural diagram of the base in the embodiment of the utility model

[0024] Figure 8 This is a three-dimensional structure diagram of the linkage member in the embodiment of the present utility model.

[0025] Figure 9 This is a partial three-dimensional cross-sectional view of the magnetic levitation drive mechanism with guiding and limiting in the embodiment of the present utility model. Detailed implementation manners

[0026] The following further describes the embodiments of the present utility model in conjunction with the attached Figures 1 - 9 drawings:

[0027] The present utility model relates to a magnetic levitation drive mechanism with guiding and limiting, which includes an electromagnetic component 1 and at least one permanent magnet 2; the permanent magnet 2 is connected to one end of a swing mechanism 3, and the other end of the swing mechanism 3 is used to drive a workpiece. In actual use, the swing mechanism 3 is used to drive a moving blade in a shaver, hair clipper or hair trimmer to move along a stationary blade to cut off hair such as beards. The permanent magnet 2 and the electromagnetic component 1 are arranged at intervals, and the swing mechanism 3 is connected in a base 4 in a horizontally displaceable and automatically resetable manner; when the electromagnetic component 1 drives the permanent magnet 2 to move linearly, the swing mechanism 3 can be horizontally displaced synchronously, and when the direction of the current in the electromagnetic component 1 changes, the reset force of the swing mechanism 3 can synchronously push the permanent magnet 2 to move linearly in the opposite direction, so that the swing mechanism 3 forms a reciprocating swing relative to the electromagnetic component 1 in the base 4. During the use process, by inputting a current with continuously alternating positive and negative polarities to the electromagnetic component 1, the electromagnetic component 1 can continuously form magnetic fields with different electromagnetic poles, and the poles of the permanent magnet 2 are fixed. Using the principle of like poles repelling and unlike poles attracting, the permanent magnet 2 can continuously and alternately perform linear motion under the action of the magnetic fields with different electromagnetic poles generated after the electromagnetic component 1 is powered on. Since the permanent magnet 2 is connected to the swing mechanism 3, when the permanent magnet 2 performs an alternating reciprocating linear motion under the action of the magnetic fields with different electromagnetic poles generated by the electromagnetic component 1, the swing mechanism 3 can synchronously follow the displacement of the permanent magnet 2 to form a reciprocating swing, greatly improving the utilization rate of the output power of the drive mechanism and enhancing the energy efficiency ratio; at the same time, it can also ensure that the swing mechanism 3 can continuously drive the moving blade to reciprocate along the stationary blade to realize the trimming of hair such as beards.

[0028] In order to ensure the continuous and smooth movement of the permanent magnet 2 when switching in different linear directions, the swinging mechanism 3 needs to have the ability of automatic reset. For example, if the swinging mechanism 3 does not have a reset force, after the magnetic field generated by the energization of the electromagnetic component 1 drives the permanent magnet 2 to linearly move in one direction and then the current of the electromagnetic component 1 is disconnected, at this time, there is no external magnetic field acting on the permanent magnet 2, and the permanent magnet 2 will stay at the end point of the linear movement and will not automatically reset to the center position. This means that when the electromagnetic component 1 inputs an opposite current and generates a magnetic field with an opposite electromagnetic pole, it is facing the position with relatively weak magnetism near the middle of the permanent magnet 2, and the permanent magnet 2 cannot immediately react to linearly move in the opposite direction, resulting in the discontinuous linear movement of the permanent magnet 2 and the swinging mechanism 3, causing jamming and affecting the hair trimming performance of the reciprocating hair trimming tool. Therefore, endowing the swinging mechanism 3 with an automatic reset force can provide an external thrust or guiding force for the reverse linear movement of the permanent magnet 2, so that the linear movement of the permanent magnet 2 is more stable and continuous when the electromagnetic component 1 switches the current direction, ensuring the hair trimming performance of the razor, hair clipper or hair trimmer.

[0029] Secondly, by arranging the permanent magnet 2 at an interval from the electromagnetic component 1 and driving the linear movement of the permanent magnet 2 through the magnetic field to drive the swinging mechanism 3 to have a horizontal displacement, this avoids the direct mechanical connection between the swinging mechanism 3 and the power source, forming a non-contact magnetic levitation structure, which can effectively reduce the frictional resistance of the mechanical connection, reduce the working noise and vibration caused by friction, and can significantly improve the hand-holding feel and use comfort of hair trimming tools such as razors, hair clippers or hair trimmers.

[0030] To ensure the continuity and stability of the permanent magnet 2 when switching the moving direction, the magnetic levitation drive mechanism further includes a reset mechanism 5. The reset mechanism 5 includes a guide member 51 for guiding and limiting the swing mechanism 3, and an elastic member 52 that can drive the swing mechanism 3 to automatically reset. Both ends of the guide member 51 are fixed on the base 4, and the swing mechanism 3 is connected to the guide member 51 in a limiting manner and can horizontally displace along the guide member 51 under the drive of the permanent magnet 2. By adding the guide member 51 and making the guide member 51 connected to the swing mechanism 3 in a limiting manner, when the permanent magnet 2 performs a linear motion under the drive of the magnetic field generated by the electromagnetic assembly 1, the guide member 51 can guide and limit the swing direction of the swing mechanism 3, effectively preventing the permanent magnet 2 and the swing mechanism 3 from moving erratically or deviating in direction, and improving the running stability of the permanent magnet 2 and the swing mechanism 3. The elastic member 52 is located between the base 4 and the swing mechanism 3, and its elastic force can synchronously push the swing mechanism 3 to perform a reverse linear motion when the current direction of the electromagnetic assembly 1 changes, so that the swing mechanism 3 forms a reciprocating swing relative to the electromagnetic assembly 1 in the base 4. The elastic member 52 mainly provides an external driving force or guiding force to the swing mechanism 3 and the permanent magnet 2 when the current direction of the electromagnetic assembly 1 alternates, so as to make the displacement continuity of the permanent magnet 2 and the swing mechanism 3 when switching the moving direction, prevent the permanent magnet 2 from jamming when losing the action of the external magnetic field at the moment when the input current of the electromagnetic assembly 1 changes, and ensure the hair trimming performance of the hair trimming tool.

[0031] To facilitate the swing mechanism 3 to drive the workpiece to reciprocate and swing to achieve hair trimming, two implementation schemes are provided in this embodiment: The first implementation method is as Figure 6 shown. The swing mechanism 3 includes a main swing frame 31 and a sub-swing frame 32, and a drive shaft 33 for driving the workpiece is arranged on the main swing frame 31. The second implementation method is as Figure 6a shown. A drive shaft 33 is arranged in both the main swing frame 31 and the sub-swing frame 32 to drive the workpiece respectively. There are mainly two differences between using a single drive shaft 33 and two drive shafts 33. One is the number of workpieces installed, and the other is that the reciprocating swing direction of the workpiece will also be different. For example, when setting a single-axis drive shaft 33, whether directly installing a workpiece at the end of the drive shaft 33 or using a one-to-two or one-to-three extended tool holder to install multiple workpieces, the swing direction of the workpiece is the same. If drive shafts 33 are respectively arranged on the main swing frame 31 and the sub-swing frame 32, the workpieces respectively installed on the drive shafts 33 can be made to reciprocate in opposite directions by controlling the reciprocating swing directions of the main swing frame 31 and the sub-swing frame 32. When the main swing frame 31 and the sub-swing frame 32 reciprocate in opposite directions, the vibration feeling formed by the impact force of the moving inertia during the swing process can also be mutually offset, improving the hand-held grip feeling of the hair trimming tool and the comfort during use.

[0032] To prevent axial movement or deviation of the swinging direction from occurring during the reciprocating swing of the main swing frame 31 and the secondary swing frame 32 when following the linear movement of the permanent magnet 2, at least one of the main swing frame 31 and the secondary swing frame 32 is connected to the guide member 51 and is fixedly arranged in the base 4 so as to be horizontally displaceable along the guide member 51 under the drive of the permanent magnet 2; by providing the guide member 51 and using the guide member 51 to be limitedly connected to at least one of the main swing frame 31 and the secondary swing frame 32, when one or both of the main swing frame 31 and the secondary swing frame 32 synchronously follow the permanent magnet 2 to reciprocate in the base 4, the guide member 51 can limit and guide the main swing frame 31 and the secondary swing frame 32, effectively preventing axial movement or deviation or misalignment of the swinging direction of the main swing frame 31 and the secondary swing frame 32, and ensuring the running smoothness and working stability of the swinging mechanism 3.

[0033] To improve the continuity of the reciprocating swing of the main swing frame 31 and the secondary swing frame 32 and avoid jamming when the electromagnetic component 1 switches the current direction and the permanent magnet 2 loses the external driving force, elastic members 52 are respectively provided between the main swing frame 31 and the secondary swing frame 32 and the base 4. The elastic members 52 can not only slow down the impact force generated when the main swing frame 31 and the secondary swing frame 32 switch the swinging direction under the drive of the permanent magnet 2 and reduce the vibration feeling of the swinging mechanism 3; at the same time, under the elastic force of the elastic members 52, when the permanent magnet 2 loses the external force instantaneously when the electromagnetic component 1 switches the current, it can automatically reset and move in the reverse direction, avoiding the jamming phenomenon generated by the permanent magnet 2 at the moment of losing the external force, and ensuring the continuity of the reciprocating swing of the permanent magnet 2, the main swing frame 31 and the secondary swing frame 32. During the actual production and assembly process, the permanent magnet 2 can be arranged at the bottom of one or both of the main swing frame 31 and the secondary swing frame 32 and kept at an interval from the electromagnetic component 1.

[0034] In this embodiment, through holes 34 are provided on the main swing frame 31 and the sub-swing frame 32. The guide members 51 are in the shape of cylindrical rods and pass through both ends of the through holes 34 to be connected to the base 4 respectively, so that the main swing frame 31 and the sub-swing frame 32 are fixedly arranged in the base 4 and can be horizontally displaced; by providing the through holes 34 on the main swing frame and the sub-swing frame 32, and using the rod-shaped guide members 51 to pass through the through holes 34 in the main swing frame 31 and the sub-swing frame 32 and be fixedly connected to the base 4, when the permanent magnet 2 makes a linear motion driven by the electromagnetic force of the electromagnetic assembly 1, the main swing frame 31 and / or the sub-swing frame 32 can synchronously follow the permanent magnet 2 and swing reciprocally along the guide members 51, thus effectively avoiding the axial up-and-down movement of the main swing frame 31 and the sub-swing frame 32, as well as the deviation or dislocation in the reciprocating swing direction, and improving the hair trimming performance of the workpiece. Of course, the guiding and limiting structure is only limited to the above-mentioned through holes 34 and the rod-shaped guide members 51. For example, a matching structure of a dovetail groove and a guide rail can also be adopted, or a row of cylinders protruding from the main swing frame 31 and the sub-swing frame 32 can be inserted into the row of grooves provided on the guide members 51, and the guiding and limiting functions can also be realized. However, it is easy to produce and process by providing the through holes 34 and the rod-shaped guide rods. Therefore, the implementation manner of this embodiment is a preferred implementation manner.

[0035] In order to reduce the production cost, the elastic members 52 are springs which are respectively sleeved outside the guide members 51 and placed between the base 4, the main swing frame 31 and the sub-swing frame 32; of course, other elastic components can also be used to replace the springs, such as a waterproof silica gel sleeve, which is sleeved on the main swing and the sub-swing frame 32. When the main swing frame 31 and / or the sub-swing frame 32 swing reciprocally synchronously following the permanent magnet 2, the two sides of the silica gel sleeve can be alternately stretched and contracted, and the main swing frame 31 and the sub-swing frame 32 can also be automatically reset when the permanent magnet 2 loses the external driving force. However, the springs have a lower cost and are easy to obtain. Therefore, the implementation manner of this embodiment is a preferred implementation manner.

[0036] In a specific embodiment, permanent magnets 2 are respectively provided at the bottoms of the main swing frame 31 and the sub-swing frame 32, and the two permanent magnets 2 make linear motions in opposite directions under the electromagnetic force generated by the electromagnetic assembly 1. Permanent magnets 2 are respectively provided at the bottoms of the main swing frame 31 and the sub-swing frame 32, and driven by the permanent magnets 2, the main swing frame 31 and the sub-swing frame 32 swing in opposite directions at the same time. By using different swing directions, the linear impact forces generated by the main swing frame 31 and the sub-swing frame 32 can be effectively offset, thereby reducing the vibration feeling during the working process of the driving mechanism and improving the hand-held grip feeling and use comfort of the hair trimming tool.

[0037] To ensure the synchronization of the main pendulum frame 31 and the auxiliary pendulum frame 32 during their linear motion driven by their respective permanent magnets 2, a linkage member 35 is provided between the main pendulum frame 31 and the auxiliary pendulum frame 32. An articulated hole 351 is provided at the center of the linkage member 35 and is connected to the base 4 through a hinge shaft 36. On both sides of the articulated hole 351 in the linkage member 35, linkage holes 352 are respectively provided. A drive shaft 33 is provided on the main pendulum frame 31, and a linkage shaft 37 is provided on the auxiliary pendulum frame 32. The drive shaft 33 and the linkage shaft 37 are respectively inserted into the linkage holes 352 to make the main pendulum frame 31 and the auxiliary pendulum frame 32 swing synchronously in opposite directions. Although the electromagnetic assembly 1 can generate an alternating magnetic field after being energized to drive the permanent magnets 2 to perform linear motion in different directions by adjusting the different magnetic pole orientations of the permanent magnets 2 at the bottoms of the main pendulum frame 31 and the auxiliary pendulum frame 32, there may be differences in the magnetic fields borne by each permanent magnet 2. Therefore, the reciprocating swing frequencies of the main pendulum frame 31 and the auxiliary pendulum frame 32 will not be synchronous, and not only cannot cancel out the impact force during the swing process and reduce the vibration feeling of the drive mechanism, but will instead increase the vibration feeling. In view of this, a linkage member 35 is added between the main pendulum frame 31 and the auxiliary pendulum frame 32, and the drive shaft 33 and the linkage shaft 37 installed on the main pendulum frame 31 and the auxiliary pendulum frame 32 are connected to the linkage member 35, so that the reciprocating swing frequencies of the main pendulum frame 31 and the auxiliary pendulum frame 32 can be forced to be consistent, and the impact forces during the reciprocating swing of the main pendulum frame 31 and the auxiliary pendulum frame 32 can be cancelled out to the greatest extent, effectively reducing the vibration feeling and synchronization of the drive mechanism during use. During the actual production of the device, as Figure 6a shown, the length of the linkage shaft 37 in the auxiliary pendulum frame 32 can be increased according to requirements so that it can drive the workpiece to reciprocate swing independently.

[0038] Since the linkage member 35 is fixed on the base 4 through the cooperation of the hinge shaft 36 and the articulated hole 351, its relative position will not displace, and it can only deflect at an angle along the hinge shaft 36. When the drive shaft 33 in the main pendulum frame 31 and the linkage shaft 37 in the auxiliary pendulum frame 32 pass through the linkage holes 352 in the linkage member 35, in order to prevent the linkage member 35 from interfering with the reciprocating swing of the main pendulum frame 31 and the auxiliary pendulum frame 32, the linkage holes 352 are long holes, the length of which is greater than the diameters of the drive shaft 33 and the linkage shaft 37, and the width of which matches the diameters of the drive shaft 33 and the linkage shaft 37, so that the auxiliary pendulum frame 32 swings in the opposite direction to the main pendulum frame 31. By controlling the shape of the linkage holes 352, when the main pendulum frame 31 and the auxiliary pendulum frame 32 swing back and forth synchronously following the permanent magnets 2, the length of the linkage holes 352 is greater than the diameters of the drive shaft 33 and the linkage shaft 37, so that the drive shaft 33 and the linkage shaft 37 can displace along the linkage holes 352 to make the linkage member 35 deflect at an angle along the hinge shaft 36, forcing the reciprocating swing frequencies of the main pendulum frame 31 and the auxiliary pendulum frame 32 to be consistent and reciprocate in opposite directions, thereby avoiding torsion of the main pendulum frame 31 and the auxiliary pendulum frame 32 caused by the linkage member 35 and resulting in jamming.

[0039] For the convenience of the overall assembly of the maglev drive mechanism and to improve the assembly efficiency, the base 4 includes a front wall 41 and a rear wall 42 that are oppositely arranged. The lower ends of the front wall 41 and the rear wall 42 are respectively fixed on both sides of the electromagnetic assembly 1, so that the base 4 and the electromagnetic assembly 1 are connected to form an integral body. Limiting plates 43 are respectively arranged on both sides of the front wall 41 and the rear wall 42 to connect the front wall 41 and the rear wall 42 into one body. In the actual production process, the front wall 41 and the rear wall 42 are frame structures arranged at intervals. The main swing frame 31, the auxiliary swing frame 32, the permanent magnet 2, the guide member 51 and the elastic member 52 are all installed between the front wall 41 and the rear wall 42. The lower ends of the front wall 41 and the rear wall 42 are respectively fixed on both sides of the electromagnetic assembly 1, so that the electromagnetic assembly 1, the swing mechanism 3, the linkage member 35, the reset mechanism 5 and the base 4 are assembled into an integral body. During the assembly process, the assembly efficiency of the maglev mechanism can be greatly improved. By means of the limiting plates 43 arranged at both ends of the front wall 41 and the rear wall 42, both ends of the guide member 51 are respectively fixed on the limiting plates 43, so that the main swing frame 31 and the auxiliary swing frame 32 can be horizontally displaced and fixed in the base 4. This not only facilitates the assembly of the guide member 51, but also can control the gap between the permanent magnet 2 and the electromagnetic assembly 1 through the setting position of the limiting plates 43. Secondly, when assembling the elastic member 52, the elastic member 52 is sleeved outside the guide member 51. One end abuts against the limiting plate 43, and the other end abuts against the end faces of the main swing frame 31 and the auxiliary swing frame 32. In this way, the limiting plate 43 can also play a reference role.

[0040] To improve the working strength of the base 4, a reinforcing plate 44 is further arranged between the end parts on both sides of the front wall 41 and the rear wall 42 of the base 4. By adding the reinforcing plate 44 between the front wall 41 and the rear wall 42, there are respectively a limiting plate 43 and a reinforcing plate 44 between the two ends of the front wall 41 and the rear wall 42 to connect the front wall 41 and the rear wall 42 into one body. This can not only effectively improve the overall working strength of the base 4, but also, an installation plate 45 can be further arranged between the reinforcing plates 44. When the maglev drive mechanism is assembled as a whole, the maglev drive mechanism can be connected and fixed to the housing of the hair trimming tool by using bolts to pass through the installation holes 451 on the installation plate 45. Secondly, the linkage member 35 is placed below the installation plate 45 and the hinge shaft 36 is inserted into the positioning hole 39 to hinge and fix the linkage member 35 to the installation plate 45. In actual production, the hinge shaft 36 and the installation plate 45 are of an integrally formed structure.

[0041] In a specific embodiment, the main swing frame 31 and the auxiliary swing frame 32 are non-metallic parts, which are connected to the metal block 38 as a whole by bolts; the permanent magnets 2 are magnetically connected to the bottom of the metal block 38, and are located below the limit plate 43 of the base 4, and the ends of the permanent magnets 2 and the metal block 38 are flush with or exceed the outer side of the limit plate 43. The main swing frame 31 and the auxiliary swing frame 32 are integrally injection molded with hard plastic materials, which can not only reduce material costs, but also improve production efficiency and reduce production costs. In order to connect and fix the permanent magnet 2 to the main swing frame 31 and the auxiliary swing frame 32, the metal block 38 is connected to the bottom of the main swing frame 31 and the auxiliary swing frame 32 by bolts, and then the permanent magnet 2 is magnetically connected to the metal block 38. Of course, the main swing frame 31 and the auxiliary swing frame 32 can also be made entirely of metal materials, so there is no need to set up a separate metal block 38. However, since the main swing frame 31 and the auxiliary swing frame 32 are irregular shapes, they need to be machined to be realized, which invisibly increases the processing cost. Therefore, the implementation method of this embodiment is the preferred implementation method.

[0042] In a specific embodiment, the electromagnetic assembly 1 includes a yoke 11 and a coil 12 formed by stacking a plurality of silicon steel sheets; fixing holes are respectively provided on both sides of the upper end of each silicon steel sheet so that the front wall 41 and the rear wall 42 of the base 4 are detachably connected and fixed to the yoke 11; and fastening holes 14 are respectively provided on both sides of the lower end of each silicon steel sheet. By directly providing fixing holes and fastening holes 14 at the upper and lower ends of the silicon steel sheet, the bolts in the fixing holes can be used to directly connect with the front wall 41 and the rear wall 42 of the base 4 during assembly, thereby reducing the protective shell wrapped around the yoke 11 and the coil 12, improving assembly efficiency, and reducing the protective shell component, thereby reducing material costs. The fastening hole 14 can ensure the overall firmness of the drive mechanism when it is installed in the housing of the hair trimming tool as a whole. That is, the upper end of the drive mechanism is connected and fixed to the housing of the hair trimming tool by inserting screws through the mounting holes 451 in the mounting plate 45 of the base 4, and the lower end is fixedly connected to the housing of the hair trimming tool by inserting screws into the fastening hole 14, thereby ensuring that the magnetic suspension drive mechanism is firmly fixed in the housing of the hair trimming tool as a whole.

[0043] The above embodiments should not be regarded as limiting the present invention, but any improvements based on the spirit of the present invention should be within the protection scope of the present invention.

Claims

1. A magnetic levitation drive mechanism with guiding and limiting functions, comprising an electromagnetic component (1) and at least one permanent magnet (2); characterized in that The permanent magnet (2) is connected to one end of the swing mechanism (3) and is arranged at an interval from the electromagnetic component (1). The swing mechanism (3) is horizontally displaceable and is connected to the inside of the base (4) in an automatically resetable manner, and its other end is used to drive the workpiece. When the electromagnetic component (1) drives the permanent magnet (2) to move linearly, the swing mechanism (3) can be horizontally displaced synchronously. When the current direction in the electromagnetic component (1) changes, the reset force of the swing mechanism (3) can synchronously push the permanent magnet (2) to move linearly in the reverse direction, so that the swing mechanism (3) forms a reciprocating swing relative to the electromagnetic component (1) in the base (4).

2. The magnetic levitation drive mechanism with guiding and limiting according to claim 1, characterized in that It further includes a reset mechanism (5). The reset mechanism (5) includes a guide member (51) for guiding and limiting the swing mechanism (3), and an elastic member (52) for driving the swing mechanism (3) to automatically reset. Both ends of the guide member (51) are fixed to the base (4), and the swing mechanism (3) is connected to the guide member (51) in a limited manner and can be horizontally displaced along the guide member (51) under the drive of the permanent magnet (2). The elastic member (52) is arranged between the base (4) and the swing mechanism (3), and its elastic force can synchronously push the swing mechanism (3) to move linearly in the reverse direction when the current direction of the electromagnetic component (1) changes, so that the swing mechanism (3) forms a reciprocating swing relative to the electromagnetic component (1) in the base (4).

3. The magnetic levitation drive mechanism with guiding and limiting according to claim 1 or 2, characterized in that The swing mechanism (3) includes a main swing frame (31) and a sub-swing frame (32). At least one of the main swing frame (31) and the sub-swing frame (32) is connected to the guide member (51) and is fixed in the base (4) so as to be horizontally displaceable along the guide member (51) under the drive of the permanent magnet (2). The elastic member (52) is arranged between the main swing frame (31) and the sub-swing frame (32) and the base (4) so that the main swing frame (31) and the sub-swing frame (32) can automatically reset when the external force disappears. The permanent magnet (2) is arranged at the bottom of one of the main swing frame (31) or the sub-swing frame (32) and is kept at an interval from the electromagnetic component (1).

4. The magnetic levitation drive mechanism with guiding and limiting according to claim 3, characterized in that Through holes (34) are provided on the main swing frame (31) and the sub-swing frame (32). The guide member (51) is in the shape of a cylindrical rod and passes through both ends of the through holes (34) to be connected to the base (4), so that the main swing frame (31) and the sub-swing frame (32) are fixed in the base (4) in a horizontally displaceable manner. The elastic member (52) is a spring and is respectively sleeved outside the guide member (51) and is arranged between the base (4) and the main swing frame (31) and the sub-swing frame (32). Permanent magnets (2) are respectively provided at the bottoms of the main swing frame (31) and the sub-swing frame (32), and the two permanent magnets (2) move linearly in opposite directions under the electromagnetic force generated by the electromagnetic component (1).

5. The magnetic levitation drive mechanism with guiding and limiting according to claim 3, characterized in that A linkage member (35) is provided between the main swing frame (31) and the secondary swing frame (32). An articulated hole (351) is provided at the center of the linkage member (35) and is connected to the base (4) through a hinge shaft (36). Linkage holes (352) are respectively provided on both sides of the articulated hole (351) inside the linkage member (35). A drive shaft (33) is provided on the main swing frame (31), and a linkage shaft (37) is provided on the secondary swing frame (32). The drive shaft (33) and the linkage shaft (37) are respectively inserted into the linkage holes (352) so that the main swing frame (31) and the secondary swing frame (32) swing synchronously in opposite directions.

6. The magnetic levitation drive mechanism with guiding and limiting according to claim 5, characterized in that The linkage holes (352) are elongated holes, the length of which is greater than the diameters of the drive shaft (33) and the linkage shaft (37), and the width of which matches the diameters of the drive shaft (33) and the linkage shaft (37), so that the secondary swing frame (32) swings in the opposite direction to the main swing frame (31).

7. The magnetic levitation drive mechanism with guiding and limiting according to claim 3, characterized in that The base (4) includes a front wall (41) and a rear wall (42) which are oppositely arranged. The lower ends of the front wall (41) and the rear wall (42) are respectively fixed on both sides of the electromagnetic assembly (1) so that the base (4) is connected to the electromagnetic assembly (1) to form an integral body. Limit plates (43) are respectively provided on both sides of the front wall (41) and the rear wall (42) to connect the front wall (41) and the rear wall (42) into one body. Both ends of the guiding member (51) are respectively fixed on the limit plates (43) so that the main swing frame (31) and the secondary swing frame (32) can be horizontally displaced and fixed inside the base (4). An elastic member (52) is sleeved outside the guiding member (51), one end of which abuts against the limit plate (43), and the other end abuts against the end faces of the main swing frame (31) and the secondary swing frame (32).

8. The magnetic levitation drive mechanism with guiding and limiting according to claim 7, characterized in that Reinforcing plates (44) are further provided between the ends on both sides of the front wall (41) and the rear wall (42) of the base (4). An installation plate (45) is provided between the reinforcing plates (44). A positioning hole (39) and installation holes (451) on both sides of the positioning hole (39) are provided on the installation plate (45). The linkage member (35) is placed below the installation plate (45) and the hinge shaft (36) is inserted into the positioning hole (39) so that the linkage member (35) is hinged and fixed to the installation plate (45).

9. The magnetic levitation drive mechanism with guiding and limiting according to claim 3, characterized in that The main swing frame (31) and the secondary swing frame (32) are non-metallic members and are connected into one body through bolts with metal blocks (38). The permanent magnets (2) are respectively magnetically connected to the bottoms of the metal blocks (38), are located below the limit plates (43) of the base (4), and the two ends of the permanent magnets (2) and the metal blocks (38) are flush with or extend beyond the outer sides of the limit plates (43).

10. The magnetic levitation drive mechanism with guiding and limiting according to claim 1, characterized in that The electromagnetic assembly (1) includes a magnetic yoke (11) formed by stacking a plurality of silicon steel sheets and a coil (12). Fixing holes are respectively provided on both sides of the upper ends of each silicon steel sheet so that the front wall (41) and the rear wall (42) of the base (4) are detachably connected and fixed to the magnetic yoke (11). Fastening holes (14) are respectively provided on both sides of the lower ends of each silicon steel sheet.

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