Linear motor bracket structure

Abstract

The objective is to provide a bracket structure for a linear motor. [Solution] The device comprises a top cover, side plates, a mounting base, and a stator core. The top cover consists of two separate and flush top covers. The mounting base is a frame with four closed sides, and fitting openings are provided on the side frames of the mounting base itself. A first protrusion is provided in the center of the stator core, and second protrusions are provided on both sides of the first protrusion. A third protrusion is provided on the outside of the second protrusion of the stator core, which can be inserted into the fitting opening. The top cover, side plates, and mounting base of the present invention are configured to be connected as a single unit, forming a closed loop connection between the three, eliminating the need for a semi-enclosed design. The connection structure consisting of the top cover, side plates, and mounting base is more stable, creating constraints between them, resulting in a more balanced distribution of forces and improved safety during manufacturing and assembly. Furthermore, the stator core and magnet piece are assembled in a fitting manner, eliminating the need for screw tightening and making assembly easier.

Description

Technical Field

[0001] The present invention relates to the technical field of linear motors, and particularly to the bracket structure of linear motors.

Background Art

[0002] As is widely known, a linear motor, also called a magnetic levitation motor, is a conventional motor mainly used in the field of shavers. It mainly depends on a stator coil and two magnet sets provided on the upper cover, and utilizes the principle of like-pole repulsion and unlike-pole attraction of magnets to alternately operate two shaver heads on the upper cover. A schematic diagram of the specific structure is shown in FIG. 1, which mainly includes an upper cover 1A, a bracket side plate 2A, and a mounting base 3A. The shaver head and two magnet sets are attached to the upper cover 1A, the stator coil is attached to the mounting base, and as a whole, it has a semi-closed frame structure. During operation, the upper cover and the bracket side plate 2A support the two-side structure and play a connecting role. Therefore, in the manufacturing process or assembly process of the entire outer frame of the linear motor bracket, due to the influence of external forces and the structure of the bracket itself on the strength, there is no mutual constraint, the forces received are unbalanced, deformation or damage occurs to the linear motor bracket (upper cover), which causes the motor to malfunction. In addition, the overall installation also requires tightening with screws. For example, when attaching a fixed stator core to the mounting base, it is necessary to tighten it to the mounting base with screws, which makes the installation difficult.

Summary of the Invention

Problems to be Solved by the Invention

[0003] Focusing on the drawbacks of the above prior art, the purpose of the present invention is to provide a bracket structure for a linear motor.

Means for Solving the Problems

[0004] To achieve the above object, the present invention adopts the following technical means.

[0005] A bracket structure for a linear motor comprising a top cover, side plates, a mounting base, and a stator core, wherein the top cover comprises two separate and flush top covers, each top cover has a shaver head mounting end face for attaching a shaver head, each top cover has a magnet piece at its bottom, both ends of each top cover are connected to the mounting base via side plates, the mounting base is a frame with four sides closed, the side frame of the mounting base itself has a fitting opening, the stator core has a first projection in its center for passing a coil through, second projections are provided on both sides of the first projection, and a third projection is provided outside the second projection of the stator core that can be inserted into the fitting opening, the distance between the second projections is equal to the distance of the frame opening of the mounting base, the second projections are insertable into the space defined by the mounting base and the top cover, and the stator core is positioned below the magnet piece.

[0006] Preferably, a fitting cavity is provided on the side of the top lid, a silicon steel plate is bonded to the back surface of the magnet piece, there are at least two silicon steel plates, the silicon steel plates are stacked on top of each other, and the silicon steel plates are inserted into the fitting cavity, and a notch is provided in the top lid at a location corresponding to the magnet piece to expose the magnet piece.

[0007] Preferably, a restricting groove is provided on the outer surface of the silicon steel plate, and a through hole for inserting a rod to support the shaver head is provided at a location corresponding to the restricting groove of the top lid. After the rod of the shaver head is inserted through the through hole, the side of the rod of the shaver head is fitted snugly into the restricting groove, thereby preventing the silicon steel plate from coming out of the fitting cavity.

[0008] Preferably, a through cavity is provided on the side plate.

[0009] Preferably, the side edge of the top lid and the side edge of the other top lid are connected via an elastic connecting member.

[0010] Preferably, the elastic connecting member has a "U" shape.

[0011] Preferably, the top cover, side plates, mounting base, and elastic connecting member are all made of PC or PPS material. [Effects of the Invention]

[0012] By employing the above means, the top cover, side plates, and mounting base of the present invention are configured to be connected as a single unit, forming a closed loop connection between the three components. This eliminates the need for a semi-enclosed design, resulting in a more stable connection structure consisting of the top cover, side plates, and mounting base. The constraints between them create a more balanced distribution of forces, improving safety during manufacturing and assembly. Furthermore, the stator iron core and magnet pieces are assembled using a snap-fit ​​system, eliminating the need for screw tightening and simplifying assembly. [Brief explanation of the drawing]

[0013] [Figure 1] This is a schematic diagram of a conventional structure in the background art of the present invention. [Figure 2] This is a schematic diagram of an embodiment of the present invention. [Figure 3] This is a three-dimensional exploded view showing the structure of an embodiment of the present invention. [Figure 4] This is a schematic front view diagram of an embodiment of the present invention. [Modes for carrying out the invention]

[0014] The present invention will be described in detail below with reference to the accompanying drawings and embodiments in order to further clarify its objectives, technical means, and advantages. It should be understood that the specific embodiments described herein are solely for the purpose of clarifying the technical content of the present invention and are not intended to limit it.

[0015] In the description of this invention, the directions or positional relationships indicated by terms such as "center," "vertical," "horizontal," "length," "width," "thickness," "top," "bottom," "front," "back," "left," "right," "vertical," "horizontal," "top," "bottom," "inside," "outside," "clockwise," and "counterclockwise" are merely for the purpose of simplifying the explanation of this invention and do not indicate or suggest that the indicated device or component necessarily has a specific direction or is composed of and operated in a specific direction, and should not be understood as limitations to this invention. Furthermore, the terms "first" and "second" are used merely to describe the purpose and should not be understood as indicating or suggesting relative importance or implicitly indicating the number of indicated technical features. Thus, "first" and "second" indicate or imply that a feature being limited includes one or more such features. Moreover, in this invention, unless otherwise specifically described, "multiple" means two or more, for example, two, three, etc.

[0016] Unless otherwise specified in this invention, the terms “attached,” “joined,” “connected,” etc., should be interpreted broadly, and may include, for example, a solid bond, a removable connection or integration, a mechanical connection, an electrical connection, a direct connection, an indirect connection via an intermediate element, an internal communication between two elements or an interaction relationship between two elements, unless otherwise clearly defined. Those skilled in the art will be able to understand the specific meaning of the above terms in this invention depending on the specific circumstances.

[0017] As shown in Figures 2 to 4, the bracket structure of the linear motor provided in this embodiment comprises a top cover 1, side plates 2, a mounting base 3, and a stator core 4, wherein the top cover 1 comprises two plates that are separated from each other and flush with each other, a shaver head mounting end surface 11 for attaching a shaver head is provided at the top end of each top cover 1, a magnet piece 5 is provided at the bottom end of each top cover 1, both ends of each top cover 1 are connected to the mounting base 3 via the side plates 2, and the mounting base 3 is a frame with four sides closed, and A fitting opening 31 is provided in the side frame of the mounting base 3, a first projection 41 for passing the coil 100 through the center of the stator core 4 is provided, second projections 42 are provided on both sides of the first projection 41, a third projection 43 is provided on the outside of the second projections 42 of the stator core 4 that can be inserted into the fitting opening 31, the distance between the second projections 42 is equal to the distance of the frame opening of the mounting base 3, the second projections 42 can be inserted into the space defined by the mounting base 3 and the top cover 1, and the stator core 4 is positioned below the magnet piece 5.

[0018] In this embodiment, the top cover 1, side plates 2, and mounting base 3 are configured to be connected as a single unit, forming a closed loop. Specifically, the side plates 2 are connected to both ends of the top cover 1, the side plates 2 are connected to the mounting base 3, and the mounting base 3 forms a seamless frame-shaped interface. This eliminates the need for a semi-enclosed design, resulting in a more stable connection structure consisting of the top cover 1, side plates 2, and mounting base 3. The constraints between them create a more balanced distribution of forces, improving safety during manufacturing and assembly. Furthermore, the stator core 4 and magnet pieces 5 are assembled using a fitting mechanism, eliminating the need for screw fastening and simplifying assembly. Specifically, the two second protrusions 42 are inserted into the frame opening of the mounting base 3, and then the third protrusion 43 is inserted into the fitting opening 31. The second protrusions 42 and the third protrusion 43 form a clamping action, allowing the stator core 4 to be directly attached to the mounting base 3 in a fitting manner. This eliminates the need to use screws and eliminates the need for external tools, such as a screwdriver, for assembly.

[0019] Furthermore, in order to improve the utilization rate of the magnetic field, in this embodiment, a fitting cavity 12 is provided on the side of the top cover 1, a silicon steel plate 51 is bonded to the back surface of the magnet piece 5, there are at least two silicon steel plates 51, the silicon steel plates 51 are stacked on top of each other, and the silicon steel plates 51 are inserted into the fitting cavity 12, and a notch 13 is provided in the location of the top cover 1 corresponding to the magnet piece 5 to expose the magnet piece 5. This design, by adding silicon steel plates 51 to the back surface of the magnet piece 5, forms a Halbach arrangement, reduces iron loss, and further improves the utilization rate of the magnetic field and the operating efficiency of the two magnet pieces 5. In addition, a fitting assembly method is also used for attachment to the top cover 1, and by bonding the silicon steel plate 51 to the magnet piece 5 and then inserting it into the fitting cavity, it becomes unnecessary to use screws.

[0020] Furthermore, because the top cover 1 needs to undergo a reciprocating oscillating motion during operation, a restricting groove 52 is provided on the outer surface of the silicon steel plate 51 in this embodiment to prevent it from coming out of the fitting cavity. A through hole 14 for inserting a rod to support the shaver head is provided at a location corresponding to the restricting groove 52 of the top cover 1. After the rod of the shaver head is inserted through the through hole 14, the side of the rod of the shaver head fits snugly into the restricting groove 52, thereby preventing the silicon steel plate 51 from coming out of the fitting cavity 12. This design not only provides a mounting position for the shaver head but also provides a restricting effect on the silicon steel plate 51 after the shaver head is mounted, killing two birds with one stone and being very clever.

[0021] In addition, in order to improve the toughness of the side plate 2, a through hole 21 is provided in the side plate 2 of the present embodiment, and the side plate 2 is formed into two thin plates, so as to satisfy the reciprocating swinging movement of the upper cover 1 and also satisfy the shock absorption and buffering functions. At the same time, the side ends of the upper cover 1 and the side ends of another upper cover 1 are connected via an elastic connecting member 6. In this way, during the reciprocating swinging movement of the upper cover 1, a mutual restraint effect acts between the two upper covers 1, resulting in the effect of balancing the power. That is, when the swinging force of one upper cover 1 becomes greater than the swinging force of the other upper cover 1, the other upper cover 1 pulls and restrains it to suppress excessive swinging. This is mainly because during actual operation, the swinging directions of the two upper covers 1 are opposite to each other and not synchronized at the same time. By connecting them with the elastic connecting member 6, they can mutually restrain each other and balance the power.

[0022] In addition, the elastic connecting member 6 has a "U" shape, and the upper cover 1, the side plate 2, the mounting base 3, and the elastic connecting member 6 are all made of PC or PPS materials. The main reason for adopting these materials is to meet the requirement of high toughness.

[0023] The above is only a preferred embodiment for explaining the present invention, and the scope of implementation of the present invention is not limited thereto. Equivalent structures or equivalent flows obtained by using the content of the specification and drawings of the present invention, or substitutions, or those directly or indirectly applied in other related technical fields, are all included within the scope of patent protection of the present invention.

Claims

1. A bracket structure for a linear motor, comprising a top cover, side plates, a mounting base, and a stator core, The aforementioned top cover comprises two top covers that are separate from each other and are flush with each other. Each of the top covers is provided with a shaver head mounting end face for attaching a shaver head. A magnetic piece is provided at the bottom edge of each of the aforementioned top covers. Both ends of each of the aforementioned top covers are connected to the mounting base via side plates. The mounting base is a frame with all four sides closed, and fitting openings are provided in the side frames of the mounting base itself. A first projection is provided in the center of the stator core for passing a coil through, second projections are provided on both sides of the first projection, and a third projection is provided on the outside of the second projection of the stator core that can be inserted into a fitting opening. The distance between the second protrusions is equal to the distance between the openings in the mounting base frame. The second projection can be inserted into the space defined by the mounting base and the upper cover. The stator core is positioned below the magnet piece, A recess is provided in the upper cover, a silicon steel plate is bonded to the back surface of the magnet piece, and the silicon steel plate is inserted into the recess. A limiting groove is formed on one side of the silicon steel sheet. The aforementioned top cover has a through hole formed in it. The rod of the shaver head passes through the through hole and enters the limiting groove, thereby positioning the silicon steel plate. A bracket structure for a linear motor, characterized by the following features.

2. The bracket structure for a linear motor according to Claim 1, characterized in that the number of silicon steel plates is at least two, the silicon steel plates are laminated together, and a notch is provided in the location of the top cover corresponding to the magnet piece to expose the magnet piece.

3. The bracket structure for a linear motor according to claim 1, characterized in that a through cavity is provided on the side plate.

4. The bracket structure for a linear motor according to claim 1, characterized in that the side end of the upper cover and the side end of the other upper cover are connected via an elastic connecting member.

5. The bracket structure for a linear motor according to claim 4, characterized in that the elastic connecting member has a "U" shape.

6. The bracket structure for a linear motor according to claim 5, characterized in that the top cover, the side plate, the mounting base, and the elastic connecting member are all made of PC or PPS material.

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