Improved structure of linear motor

Abstract

The utility model provides an improved structure of a linear motor, which comprises a support, a stator and two rotors with the same structure are arranged in the support, and the two rotors are arranged above the stator side by side at an interval and move back and forth in a staggered manner under the magnetic action of the stator; wherein the two rotors sequentially comprise fixing frames, connecting pieces, magnet yokes and magnet sets used in cooperation with the stators from top to bottom, each fixing frame comprises a mounting plate, a mounting column and reinforcing ribs, a transmission rod is arranged in at least one fixing frame, the transmission rods penetrate through the fixing frames and the magnet yokes at the same time, and the movement of the magnet yokes can directly drive the transmission rods to swing; therefore, the moving efficiency of the movable cutter is higher and more accurate; according to the utility model, only one limiting piece is arranged on one side, so that the use of parts is reduced, the swing resistance of the movable cutter can be reduced, the energy consumption is reduced, the cost is saved, the noise can be reduced, and the use experience feeling of a user is improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to motor technical field, concretely relates to an improved structure of linear motor. BACKGROUND

[0002] The electric tools such as hair clipper and shaver commonly seen in life are mainly driven by the high-frequency reciprocating movement of linear motor to realize the effect of hair cutting or shaving, and the motor used in the prior art is mostly electromagnetic vibration motor, and the moving knife is not directly connected with the magnetic yoke, so the accuracy of swing amplitude is easily affected by other elements, and the accuracy of moving knife will decrease in long-term use; in addition, in order to ensure the stability of moving amplitude of moving knife, the prior art uses multiple limit pieces in the motor to limit the swing range of moving knife, so as to not only increase the resistance of moving knife swing, increase energy consumption and affect the accuracy of movement, but also increase noise and affect the user's experience. UTILITARY MODEL CONTENTS

[0003] (1) Technical problem to be solved

[0004] The utility model provides an improved structure of linear motor, aims at solving the problems of large swing resistance, large noise and unstable accuracy of electric tool in prior art.

[0005] (2) Technical scheme

[0006] The utility model provides an improved structure of linear motor, including support, be equipped with stator and two structure same mover in the support, two the mover is arranged in the upper of stator and is under the magnetic action of the stator and does the reciprocating movement of staggered,

[0007] Among them, the mover includes fixing frame, connecting piece, magnetic yoke and magnet group used in cooperation with the stator from top to bottom, the fixing frame includes mounting plate, mounting column and reinforcing rib, at least one fixing frame is equipped with transmission rod, the transmission rod simultaneously penetrates the fixing frame and the magnetic yoke, and the movement of the magnetic yoke can directly drive the transmission rod to swing; only one side of the mounting column is provided with the limit piece for limiting the swing amplitude of two movers and is rotatably connected on two connecting pieces.

[0008] Further, the limit piece is further provided with a limiting rod, one end of the limiting rod is rotatably connected with the limit piece, and the other end is fixedly connected with the support.

[0009] Further, the magnetic yoke is provided with a through hole one corresponding to the position of the transmission rod, and the transmission rod is interference connected with the through hole one.

[0010] Further, the magnet group is arranged at the bottom of the magnetic yoke and fixedly connected with the magnetic yoke, the magnet group comprises a magnet one and a magnet two, the magnet one and the magnet two are arranged in the direction of the magnetic yoke and are oppositely polarized near one end of the stator.

[0011] Further, the length of the magnetic yoke is L1, the length of the magnet group is L2, and L1>L2.

[0012] Further, on the swing direction, the both sides of the fixed frame are provided with elastic members one, and the both ends of the elastic members one are respectively abutted with the outside of the fixed frame and the inside of the support.

[0013] Further, the outside of the fixed frame and the inside of the support are respectively provided with protrusions corresponding to the both ends of the elastic members one, and the both ends of the elastic members one are respectively sleeved on the protrusions.

[0014] Further, the outside of the support is further provided with a plurality of elastic members two arranged in a separated mode, one end of the elastic members two is riveted with the support, and the other end is riveted with the corresponding connecting member.

[0015] Further, the connecting member is made of stainless steel material, and the both ends are downwardly bent to form two connecting portions, and the elastic members two are riveted with the connecting portions.

[0016] Further, the stator comprises an iron core, a coil and a wire frame, the iron core is arranged in a mountain shape and is respectively screwed with the support on both sides, the wire frame is sleeved on the middle part of the iron core, and the coil is wound on the wire frame.

[0017] Compared with the prior art, the utility model has the advantages that:

[0018] The utility model only sets up one limiting piece to limit the swing amplitude of the rotor, makes the resistance of motor swing drop, can reduce energy consumption, is more cost-effective, can also reduce noise, improves user experience, in addition, the utility model directly connects the transmission rod connected with the moving knife and the magnetic yoke, can make the driving force generated by the magnetic yoke and the magnet directly transmit to the transmission rod, thereby can make the moving efficiency of the moving knife higher and more accurate. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is the whole structure schematic view of the utility model.

[0020] Figure 2 It is the whole structure explosion drawing of the utility model.

[0021] Figure 3 It is the rotor structure explosion drawing of the utility model.

[0022] Figure 4 It is the exploded view of the limiting piece structure of the utility model.

[0023] Figure 5 It is the partial sectional view of the limiting piece of the utility model.

[0024] Figure 6 It is the schematic diagram of the limiting piece static state of the utility model.

[0025] Figure 7 It is the schematic diagram of the limiting piece motion state of the utility model.

[0026] Figure 8 It is the overall structure sectional view of the utility model.

[0027] Figure 9 It is the magnet yoke and magnet group length schematic diagram of the utility model.

[0028] Figure 10 It is the magnet group under the action of stator of the utility model movement schematic Figure 1 .

[0029] Figure 11 It is the magnet group under the action of stator of the utility model movement schematic Figure 2 .

[0030] Figure 12 It is the stator structure exploded view of the utility model.

[0031] Reference signs: 1 - support, 11 - rod hole, 12 - support one, 13 - support two, 14 - hollow structure, 2 - stator, 21 - iron core, 22 - coil, 23 - wire frame, 3 - mover, 31 - fixed frame, 311 - transmission rod, 312 - side hole three, 313 - mounting plate, 314 - mounting column, 315 - reinforcing rib, 32 - connecting piece, 321 - connecting part, 322 - avoiding groove, 323 - side hole one, 33 - magnet yoke, 331 - through hole one, 332 - side hole two, 34 - magnet group, 341 - magnet one, 342 - magnet two, 4 - limiting piece, 41 - limiting rod, 42 - through hole two, 43 - fastener, 44 - through hole three, 5 - elastic piece one, 51 - protrusion, 6 - elastic piece two. DETAILED DESCRIPTION

[0032] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model.

[0033] As Figures 1-2The utility model provides an improved structure of linear motor, including support 1, be equipped with stator 2 and two structure same mover 3 in support 1, two mover 3 interval parallel setting in the top of stator 2 and under the magnetic action of stator 2 do the interlaced to and fro movement. Two mover 3 include fixed frame 31, connecting piece 32, magnetic yoke 33 and magnet group 34 of cooperation with stator 2 from top to bottom in proper order, the bottom of fixed frame 31 with connecting piece 32 and magnetic yoke 33 three fixed connections, at least one fixed frame 31 still be equipped with transmission rod 311, transmission rod 311 one end penetrates fixed frame 31 after penetrating magnetic yoke 33 last three fixed connection integrations, the other end is connected with external moving knife (the drawing does not show), and transmission rod 311 does not directly connect with magnetic yoke 33 in prior art, transmission rod 311 needs under the drive of magnetic yoke 33 first drive fixed frame 31 to move and move, and the movement of magnetic yoke 33 is as the motive force of drive transmission rod 311 movement, if the motive force of drive is indirect drive, then can make the accuracy of movement exist certain error, thereby influence use effect, and the utility model can make magnetic yoke 33 move directly drive transmission rod 311 move by the transmission rod 311 penetration magnetic yoke 33 after direct fixed connection, make the accuracy of movement higher faster, and the overall connection structure is more stable, even if the connecting piece 32 or fixed frame 31 exists connection slack also can not influence the movement of transmission rod 311, and the practicality is stronger.

[0034] Preferably, as Figure 3 As shown in the embodiment, the magnetic yoke 33 is provided with a through hole one 331 corresponding to the position of the transmission rod 311, and the transmission rod 311 is connected, glued or screwed with the through hole one 331. Alternatively, the magnetic yoke 33 is provided with a matching groove (not shown in the drawing) corresponding to the position of the transmission rod 311, and the transmission rod 311 is clamped with the groove.

[0035] Preferably, the connecting piece 32 is provided with a avoiding slot 322 corresponding to the position of the transmission rod 311, so that the transmission rod 311 can be directly connected with the magnetic yoke 33 without passing through the connecting piece 32, and the moving resistance is smaller, so that the moving accuracy is higher, and the material can be saved in production, and the cost is reduced.

[0036] Further, as Figures 3-7As shown, the utility model only sets the limiting piece 4 which rotates and connects on two connecting pieces 32 on one side of the installation column 314, the limiting piece 4 is used to limit the swing amplitude of two movers 3. Both ends of the limiting piece 4 are respectively equipped with through hole two 42 and fastener 43, one end of the fastener 43 is equipped with a thread, and the other end is a cylinder, wherein the threaded end of the fastener 43 is downwardly threaded through the side hole one 323 of the connecting piece 32 and is screwed, bonded or interference fit connected with the side hole two 332 of the magnetic yoke 33, the side hole two 332 penetrates the magnetic yoke 33, and the side hole one 323 and the side hole two 332 correspond to the side hole three 312 of the fixed frame 31, that is, the threaded end of the fastener 43 sequentially passes through the side hole one 323, the side hole three 312 and the side hole two 332 to realize the fixed connection of the three, and the cylindrical end is adapted to the through hole two 42 and is rotatably connected, in the utility model embodiment, the connecting position of the limiting piece 4 and the connecting piece 32 and the connecting position of the connecting piece 32 and the magnetic yoke 33 and the fixed frame 31 correspond, therefore, the fastener 43 is screwed with the connecting piece 32 at the same time, and is also screwed with the fixed frame 31 and the magnetic yoke 33, thereby, by using the same fastener 43, the above-mentioned elements can be commonly connected and fixed, the use of parts can be reduced, and materials can be saved.

[0037] Specifically, as shown in Figure 3 、 Figure 4 The connecting piece 32 is provided with a avoiding groove 322 matched with the fixed frame 31, the fixed frame 31 is overall inverted T-shaped, the lower part is a horizontal transverse installation plate 313, the upper part is an installation column 314 perpendicular to the horizontal transverse installation plate 313, the installation column 314 and the installation plate 313 form two side right angle parts respectively with two triangular reinforcing ribs 315, the avoiding groove 322 is U-shaped and surrounded around the periphery of the four reinforcing ribs 315, the installation plate 313 is located below the connecting piece 32, and the installation column 314 passes through the avoiding groove 322 and is located above the connecting piece 32.

[0038] Preferably, a through hole three 44 is further arranged in the middle of the limiting piece 4, a limiting rod 41 is arranged in the through hole three 44, a rod hole 11 corresponding to the limiting rod 41 is arranged in the support 1, one end of the limiting rod 41 is rotationally connected with the limiting piece 4, and the other end is screwed or interference fit with the rod hole 11 of the support 1, so that the limiting rod 41 can be fixed on the support 1, the two ends of the limiting piece 4 can move back and forth with the mover 3 as the center of the limiting rod 41, and the two movers 3 can only move within the rotatable range of the limiting piece 4, so as to limit the movement amplitude of the two movers 3, so as to avoid vibration or vibration noise caused by too large movement amplitude, compared with the prior art in which one limiting piece 4 is arranged at each end of the connecting piece 32, the mover 3 can move back and forth with smaller resistance when only one limiting piece 4 is arranged in the utility model, so that the required current is smaller, the energy consumption and noise can be further reduced, and the use experience effect is improved.

[0039] Further, as shown in Figure 8 The elastic member one 5 is arranged on both sides of the fixed frame 31 and the support 1 in the oscillation direction, the two ends of the elastic member one 5 are respectively abutted with the outside of the fixed frame 31 and the inside of the support 1, the outside of the fixed frame 31 and the inside of the support 1 are respectively provided with protrusions 51 corresponding to the two ends of the elastic member one 5, and the two ends of the elastic member one 5 are respectively sleeved on the protrusions 51, in the embodiment of the utility model, the elastic member one 5 is a spring, the protrusions 51 are arranged to prevent the displacement of the elastic member one 5 by sleeving the two ends of the elastic member one 5 on the protrusions 51. When the fixed frame 31 moves back and forth, the elastic member one 5 on both sides is compressed, so that the elastic force of the elastic member one 5 can automatically reset the fixed frame 31, and the movement speed and accuracy of the transmission rod 311 can be further improved.

[0040] Further, as shown in Figure 8 The outside of the support 1 is further provided with elastic members two 6 corresponding to the connecting pieces 32, one end of the elastic member two 6 is riveted with the support 1, and the other end is riveted with the corresponding connecting piece 32, so that the position of the connecting piece 32 can be fixed, so that the fixed frame 31 is suspended above the stator 2 and moves back and forth alternately. Since the one end of the elastic member two 6 connected with the connecting piece 32 also swings back and forth when the connecting piece 32 moves back and forth, the elastic member two 6 is a sheet-shaped elastic piece that can deform, which can realize the fixing and supporting effect and automatically recover when deformed.

[0041] Further, as shown in Figure 9As shown, two ends of the connecting piece 32 are bent downward to form two connecting portions 321, the elastic piece two 6 is riveted with the connecting portions 321 of the connecting piece 32, and the processing of the part and the connection with other parts can be more convenient by setting the two ends of the connecting piece 32 to be bent downward. The magnetic yoke 33 is arranged between the two connecting portions 321 and is screwed with the bottom of the connecting piece 32, the magnet group 34 is fixedly connected with the magnetic yoke 33, wherein the length of the magnetic yoke 33 is L1, the length of the magnet is L2, and L1>L2.

[0042] Preferably, in the embodiment of the utility model, the material of the transmission rod 311 and the connecting piece 32 is preferably stainless steel, which can make the transmission rod 311 and the connecting piece 32 lighter in weight to reduce the resistance of movement, and also waterproof, corrosion-resistant, durable and longer in service life.

[0043] Further, as shown in the figure, Figures 10-11 The magnet group 34 includes magnet one 341 and magnet two 342, the magnet one 341 and the magnet two 342 are arranged at intervals along the direction of the magnetic yoke 33, and the polarity of the magnet one 341 and the magnet two 342 close to one end of the stator 2 is opposite, so as to move back and forth under the magnetic action of the stator 2.

[0044] Specifically, as shown in the figure, Figure 12 The bracket 1 is a detachable connection structure, including bracket one 12 and bracket two 13, the stator 2 is arranged in the cavity formed by the bracket one 12 and the bracket two 13, the stator 2 includes iron core 21, coil 22 and wire frame 23, the iron core 21 is arranged in the shape of a mountain, and the two sides of the iron core 21 are fixedly connected with the bracket one 12 and the bracket two 13 through bolts, the wire frame 23 is sleeved on the middle part of the iron core 21, and the coil 22 is wound on the wire frame 23. In use, alternating current is connected with the coil 22, and then an electromagnetic field is generated under the influence of the iron core 21, and the electromagnetic field respectively repels and attracts the magnet one 341 and the magnet two 342 alternately to drive the mover 3 to move back and forth alternately.

[0045] In the embodiment, after the bracket one 12 and the bracket two 13 are fixedly connected, a hollow structure 14 is formed at the top thereof, the transmission rod 311 moves in the hollow structure 14 and is connected with a moving knife (not shown in the figure) through the hollow structure 14.

[0046] In addition, it should be understood that although the present specification is described in terms of embodiments, not every embodiment contains only one independent technical solution, and the present specification is described in this way only for the sake of clarity, and those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that those skilled in the art can understand.

[0047] It is obvious to those skilled in the art that the present application is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or essential characteristics of the present application. Therefore, from any point of view, the embodiments should be considered as exemplary and non-limiting, and the scope of the present application is defined by the appended claims rather than the above description, and therefore all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present application. Any reference signs in the claims should not be considered as limiting the claims involved.

Claims

1. An improved structure of a linear motor, characterized by comprising: The application relates to a bracket (1) provided with a stator (2) and two identical movers (3) arranged above the stator (2) and moving back and forth under the magnetic action of the stator (2). The mover (3) comprises a fixing frame (31), a connecting piece (32), a magnetic yoke (33) and a magnet group (34) matched with the stator (2) from top to bottom; the fixing frame (31) comprises a mounting plate (313), a mounting column (314) and a reinforcing rib (315); at least one fixing frame (31) is provided with a transmission rod (311) penetrating through the fixing frame (31) and the magnetic yoke (33); the magnetic yoke (33) can directly drive the transmission rod (311) to swing; a limiting piece (4) for limiting the swing amplitude of the two movers (3) is arranged on one side of the mounting column (314) and rotatably connected to the two connecting pieces (32).

2. The improvement in a linear motor according to claim 1 wherein, The limiting piece (4) is further provided with a limiting rod (41) rotatably connected to one end of the limiting piece (4) and fixedly connected to the other end of the bracket (1).

3. The improvement in a linear motor according to claim 1 wherein, The magnetic yoke (33) is provided with a through hole (331) corresponding to the position of the transmission rod (311); the transmission rod (311) is connected with the through hole (331) in an interference mode.

4. The improvement in a linear motor according to claim 3 wherein, The magnet group (34) is arranged at the bottom of the magnetic yoke (33) and fixedly connected to the magnetic yoke (33); the magnet group (34) comprises a magnet (341) and a magnet (342); the magnet (341) and the magnet (342) are arranged in a spaced mode along the direction of the magnetic yoke (33); and the polarities of the magnet (341) and the magnet (342) at the end close to the stator (2) are opposite.

5. The improvement in a linear motor according to claim 4 wherein, The length of the magnetic yoke (33) is L1, and the length of the magnet group (34) is L2, and L1>L2.

6. The improvement in a linear motor according to claim 1 wherein, In the swing direction, the two sides of the fixing frame (31) are provided with elastic pieces (5); the two ends of the elastic pieces (5) are respectively abutted to the outside of the fixing frame (31) and the inside of the bracket (1).

7. The improvement in a linear motor according to claim 6 wherein, The outside of the fixing frame (31) and the inside of the bracket (1) are respectively provided with protrusions (51) corresponding to the two ends of the elastic pieces (5); the two ends of the elastic pieces (5) are respectively sleeved on the protrusions (51).

8. The improvement in a linear motor according to claim 1 wherein, The outside of the bracket (1) is further provided with a plurality of elastic pieces (6) arranged in a spaced mode; one end of the elastic piece (6) is riveted to the bracket (1), and the other end is riveted to the corresponding connecting piece (32).

9. The improvement in a linear motor according to claim 8 wherein, The connecting piece (32) is made of stainless steel material, and the two ends thereof are bent downward to form two connecting portions (321); the elastic piece (6) is riveted to the connecting portion (321).

10. The improvement in a linear motor according to claim 1 wherein, The stator (2) comprises an iron core (21), a coil (22) and a wire frame (23), the iron core (21) is arranged in a'mountain' shape and is screwed with the support (1) on both sides, the wire frame (23) is sleeved on the middle part of the iron core (21), and the coil (22) is wound on the wire frame (23).

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