Linear motor with stable structure

Abstract

The utility model relates to a linear motor with a stable structure, which comprises a support base, an electromagnet, a plurality of groups of movable assemblies and a plurality of groups of spring assemblies, and the support base, the plurality of groups of movable assemblies and the plurality of groups of spring assemblies are connected to form an integrated frame structure. Each movable assembly comprises a movable head and a permanent magnet fixed to the movable head, the permanent magnets and the electromagnets are arranged in an up-down corresponding mode, the multiple movable assemblies are distributed side by side in the position perpendicular to the moving direction of the movable heads, and the multiple spring assemblies are distributed on the two sides of the supporting base side by side in the position perpendicular to the moving direction of the movable heads. Each spring assembly is connected with the supporting base and the movable assembly. The electromagnet comprises an iron core and a coil, the coil is arranged on the supporting base and under the permanent magnet, and the supporting base is provided with a through hole allowing the iron core to penetrate from bottom to top. The utility model has the following advantages: by adopting the integrated structure, the overall dimension of the motor can be properly reduced while the stability of the bottom structure is ensured, and the assembly is convenient.

Description

Technical Field

[0001] The utility model belongs to the field of motors, and in particular relates to a linear motor with a stable structure. Background Art

[0002] A motor is a type of machine that converts electrical energy directly into linear motion mechanical energy. It has the advantages of fast startup speed, low power consumption, low noise, and excellent product reliability. It is suitable for applications in industries such as thin and light consumer electronics and long battery life. When current is passed through the coil of a linear motor, the electromagnet generates a magnetic field, which in turn generates an interaction force with the permanent magnet. This force drives the movable head to reciprocate left and right, thereby driving the output end to work.

[0003] The existing linear motor structure, refer to Figure 6 The upper two parts of the connecting arm (spring assembly) made of elastic material connect the permanent magnet and the external power output (active assembly), and the lower end engages the electromagnetic part. In order to assemble the electromagnet as a whole, the bottom of the connecting arm is disconnected, and the bottom connection is unstable. The connecting arm and the base are fixed with bolts, and the assembly is cumbersome. There is a risk of bolt loosening during vibration. In addition, in order to ensure sufficient Z-direction stiffness to resist the suction of the iron core and the permanent magnet, this structural design requires multiple support springs on one side, which cannot reduce the shape of the motor and has limited use. Utility Model Content

[0004] The purpose of the utility model is to overcome the above-mentioned deficiencies and provide a linear motor with a stable structure. The integrated structure is adopted to ensure the stability of the bottom structure while appropriately reducing the motor's external dimensions and facilitating assembly.

[0005] The purpose of the utility model is achieved through the following technical solutions: a linear motor with stable structure, comprising a support base, an electromagnet, multiple groups of movable components and multiple groups of spring components, wherein the support base, the multiple groups of movable components and the multiple groups of spring components are connected to form an integrated frame structure;

[0006] Each group of movable components includes a movable head and a permanent magnet fixed to the movable head, the permanent magnet and the electromagnet are arranged in correspondence with each other up and down, multiple groups of movable components are arranged side by side along a position perpendicular to the moving direction of the movable head, multiple groups of spring components are arranged side by side on both sides of the support base along the moving direction of the movable head, and each group of spring components is connected to the support base and the movable components;

[0007] The electromagnet comprises an iron core and a coil. The coil is placed on a supporting base and directly below the permanent magnet. The supporting base is provided with a through hole for allowing the iron core to penetrate from bottom to top.

[0008] A further improvement of the utility model is that the iron core includes an iron core main body and three iron core column parts extending from the iron core main body, the three iron core column parts are distributed side by side along the moving direction of the movable head, the bottom of the support base has a slot body part in which the iron core column parts are embedded, the slot body part is communicated with the through hole, the three iron core column parts on the iron core main body pass through the through hole and are connected to the coil, the coil is sleeved on the middle iron core column part, and the upper and lower ends of the coil are provided with insulating pads.

[0009] A further improvement of the utility model is that: the upper end of the support base near the positions of the core columns on both sides has a U-shaped boss covering the outer sides of the two core columns, and the two U-shaped bosses are arranged facing each other.

[0010] A further improvement of the utility model is that: the movable components are divided into two groups, the movable components further include magnetic conductors, the magnetic conductors are placed between the corresponding movable heads and the permanent magnets, and the magnetic poles of the permanent magnets of the two groups of movable components are arranged in opposite directions.

[0011] A further improvement of the utility model is that: each movable head has connecting parts with openings facing each other at both sides of the lower end along the moving direction thereof, and the magnetic conductor is placed between the two corresponding connecting parts.

[0012] A further improvement of the utility model is that the spring assembly is divided into two groups and arranged on both sides of the movable head along its moving direction. The spring assembly includes two supporting springs respectively connected to the side ends of the two movable heads, and the outer sides of the two supporting springs are commonly connected with a coupling spring.

[0013] A further improvement of the utility model is that: there is a gap between the coupling spring and the supporting spring, the coupling spring includes an upper horizontal portion extending horizontally outward from the inner side of the upper end of the corresponding supporting spring, a lower horizontal portion is provided directly below the two upper horizontal portions, and the ends of the upper horizontal portion and the lower horizontal portion are connected to two opening arc portions arranged facing each other.

[0014] A further improvement of the utility model is that: a gap is provided between the upper end of the support spring and the corresponding connecting portion, and a gap is provided between the lower end of the support spring and the corresponding U-shaped boss.

[0015] Compared with the prior art, the utility model has the following advantages:

[0016] 1. The utility model connects the support base, the movable component and the spring component to form an integrated frame structure, which improves the overall structural stability, reduces the number of support springs, can effectively reduce the motor's overall dimensions, eliminates the bottom fixing method by bolts, and avoids the risk of loosening during vibration. During assembly, the core column penetrates the support base from bottom to top to achieve cooperation with the coil, completing the overall installation of the motor, and the assembly is convenient and fast.

[0017] 2. A coupling spring is set outside the supporting spring. When the amplitudes of the two movable heads are inconsistent, the coupling spring plays the role of transmitting resistance, which helps to keep the forces on both sides balanced, thereby reducing the amplitude difference on both sides. When users use it, the vibration feel is weaker and the experience is comfortable. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the structure of Example 1 of the utility model.

[0019] Figure 2 for Figure 1 Schematic diagram of the structure of the electromagnet.

[0020] Figure 3 for Figure 1 Schematic diagram of the connection between the middle support base, movable component and spring component.

[0021] Figure 4 This is a schematic diagram of the structure of Example 2 of the utility model.

[0022] Figure 5 for Figure 4 Side view of.

[0023] Figure 6 It is a structural schematic diagram of the prior art in the background technology of the utility model.

[0024] Numbers in the figure:

[0025] 1-support base, 2-electromagnet, 3-movable component, 4-spring component;

[0026] 11-through hole, 12-groove body, 13-U-shaped boss;

[0027] 21- iron core, 22- coil; 211- iron core body, 212- iron core column, 213- insulation pad;

[0028] 31-movable head, 32-permanent magnet, 33-magnetic conductor, 34-connecting part;

[0029] 41 - supporting spring, 42 - coupling spring, 421 - upper horizontal portion, 422 - lower horizontal portion, 423 - arc portion. DETAILED DESCRIPTION

[0030] In order to deepen the understanding of the present invention, the present invention will be further described in detail below in conjunction with embodiments and drawings. The embodiments are only used to explain the present invention and do not constitute a limitation on the protection scope of the present invention.

[0031] In the description of the present invention, it is necessary to understand that terms indicating orientation or positional relationships, such as orientation or positional relationships based on the drawings, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the structure or unit referred to must have a specific orientation. Therefore, it cannot be understood as a limitation on the present invention.

[0032] In the present utility model, unless otherwise clearly stipulated and limited, terms such as "connected", "provided with", "having" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection. It can be said to be a mechanical connection, or it can be directly connected, or it can be connected through an intermediate medium. For those skilled in the art, the basic meaning of the above terms in the present utility model can be understood according to the specific circumstances. Embodiment 1

[0033] A linear motor with a stable structure, such as Figures 1 to 3 As shown, it includes a support base 1, an electromagnet 2, multiple groups of movable components 3 and multiple groups of spring components 4, and the support base 1, multiple groups of movable components 3 and multiple groups of spring components 4 are connected to form an integrated frame structure;

[0034] Each group of movable components 3 includes a movable head 31 and a permanent magnet 32 ​​fixed to the movable head 31, the permanent magnet 32 ​​and the electromagnet 2 are arranged in correspondence with each other up and down, multiple groups of movable components 3 are arranged side by side along a position perpendicular to the moving direction of the movable head 31, multiple groups of spring components 4 are arranged side by side on both sides of the support base 1 along the moving direction of the movable head 31, and each group of spring components 4 is connected to the support base 1 and the movable component 3;

[0035] The electromagnet 2 includes an iron core 21 and a coil 22 . The coil 22 is placed on the support base 1 and directly below the permanent magnet 32 ​​. The support base 1 has a through hole 11 through which the iron core 21 passes from bottom to top.

[0036] The utility model connects the support base 1, the movable component 3 and the spring component 4 to form an integrated frame structure, which improves the overall structural stability, reduces the number of support springs 41, can effectively reduce the motor's overall dimensions, eliminates the bottom fixing method by bolts, and avoids the risk of loosening during vibration.

[0037] Based on this implementation, the iron core includes an iron core main body 211 and three iron core column portions 212 extending from the iron core main body 211. The three iron core column portions 212 are distributed side by side along the moving direction of the movable head 31. The bottom of the support base 1 has a slot body portion 12 in which the iron core column portions 212 are embedded. The slot body portion 12 is communicated with the through hole 11. The three iron core column portions 212 on the iron core main body 211 pass through the through hole 11 and are connected to the coil 22. The coil 22 is sleeved on the middle iron core column portion 212, and the upper and lower ends of the coil 22 have insulating pads 213.

[0038] During assembly, the insulating pad 213 and the coil 22 are placed on the support base 1 in sequence, and the core column 212 penetrates the support base 1 from bottom to top to cooperate with the coil 22, completing the overall installation of the motor, and the assembly is convenient and fast.

[0039] It should be noted that after the iron core 21 is inserted into the coil 22 from bottom to top, the iron core 22 and the support base 1 can be fixed by gluing, or gluing is not required, because the permanent magnet 32 ​​has a large suction force (about 20N) on the iron core 22. Finally, the linear motor is assembled into the whole machine. After the support base 1 is fixed to the whole machine, the iron core 21 is closed and limited in the whole machine and the support base 1. Moreover, the support base can be made of elastic plastic, and the iron core 21 and the support base 1 can be set with a slight interference fit, which also satisfies the fixation between the iron core 21 and the support base 1.

[0040] On the basis of this embodiment, the upper end of the support base 1 near the core column parts 212 on both sides has a U-shaped boss 13 covering the outer sides of the two core column parts 212, and the two U-shaped bosses 13 are arranged facing each other.

[0041] On the basis of this embodiment, the movable components 3 are divided into two groups, and the movable components 3 also include magnetizers 33, which are placed between the corresponding movable heads 31 and permanent magnets 32, and the magnetic poles of the permanent magnets 32 of the two groups of movable components 3 are arranged in opposite directions.

[0042] When alternating current is passed through the coil 22, the electromagnet 2 generates a magnetic field, which in turn generates an interaction force with the permanent magnet 32. This force drives the movable head 31 to move back and forth left and right. The magnetic poles of the permanent magnets 32 of the two groups of movable components 3 are arranged in opposite directions, so the two movable heads 31 move back and forth in an alternating manner, thereby offsetting part of the vibration.

[0043] On the basis of this embodiment, each movable head 31 has connecting parts 34 with openings facing each other at both sides of the lower end along the moving direction thereof, and the magnetic conductor 33 is placed between the two corresponding connecting parts 34 . Embodiment 2

[0044] Based on the above embodiment 1, Figure 4 , Figure 5 The preferred solution is that the spring assembly 4 is divided into two groups and is arranged on both sides of the movable head 31 along its moving direction. The spring assembly 4 includes two supporting springs 41 respectively connected to the side ends of the two movable heads 31, and the outer sides of the two supporting springs 41 are commonly connected with a coupling spring 42.

[0045] In this embodiment, there is a gap between the coupling spring 42 and the support spring 41. The coupling spring 42 includes an upper horizontal portion 421 extending horizontally outward from the inner side of the upper end of the corresponding support spring 41. A lower horizontal portion 422 is provided directly below the two upper horizontal portions 421. The ends of the upper horizontal portion 421 and the lower horizontal portion 422 are connected to two opening arc portions 423 arranged opposite to each other.

[0046] Reciprocating linear motors generally use two moving heads with opposite movement directions (the moving heads are connected to the movable heads) to offset the vibration. In theory, the movements on both sides are completely symmetrical and in opposite directions, and the vibrations cancel each other out. However, in actual use, the loads on the moving heads on both sides are inconsistent, and the swing amplitude is often larger on one side and smaller on the other, and the vibration cannot be completely eliminated. In the present application, a coupling spring 42 is arranged on the outer side of the two support springs on one side. When the amplitudes of the two movable heads are inconsistent, the coupling spring 42 transmits resistance, which helps to balance the forces on both sides, thereby reducing the difference in amplitude on both sides. When the user uses it, the vibration feel is weaker and the experience is comfortable.

[0047] Among them, there is a gap between the upper end of the support spring 41 and the corresponding connecting part 34, and there is a gap between the lower end of the support spring 41 and the corresponding U-shaped boss 13. When the two movable heads 31 move relative to each other, the support spring 41 swings with the reciprocating movement of the movable head 31. The setting of the gap between the support spring 41 and the connecting part 34 and the U-shaped boss 13 avoids mutual contact and wear during the swinging process.

[0048] Those skilled in the art should understand that the present invention is not limited by the above embodiments. The above embodiments and the description are only for explaining the principle of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which are within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A linear motor with a stable structure, characterized in that: It comprises a support base (1), an electromagnet (2), a plurality of groups of movable components (3) and a plurality of groups of spring components (4), wherein the support base (1), the plurality of groups of movable components (3) and the plurality of groups of spring components (4) are connected to form an integrated frame structure; Each group of movable components (3) comprises a movable head (31) and a permanent magnet (32) fixed to the movable head (31), the permanent magnet (32) and the electromagnet (2) being arranged in correspondence with each other up and down, the multiple groups of movable components (3) being arranged side by side along a position perpendicular to the moving direction of the movable head (31), the multiple groups of spring components (4) being arranged side by side on both sides of the support base (1) along the moving direction of the movable head (31), and each group of spring components (4) being connected to the support base (1) and the movable component (3); The electromagnet (2) comprises an iron core (21) and a coil (22); the coil (22) is placed on a support base (1) and directly below a permanent magnet (32); the support base (1) has a through hole (11) through which the iron core (21) passes from bottom to top.

2. A structurally stable linear motor according to claim 1, characterized in that: The iron core comprises an iron core main body (211) and three iron core column parts (212) extending from the iron core main body (211), the three iron core column parts (212) being arranged side by side along the moving direction of the movable head (31), the bottom of the support base (1) having a slot body part (12) in which the iron core column parts (212) are embedded, the slot body part (12) being communicated with the through hole (11), the three iron core column parts (212) on the iron core main body (211) passing through the through hole (11) and being connected to the coil (22), the coil (22) being sleeved on the middle iron core column part (212), and the upper and lower ends of the coil (22) both having insulating pads (213).

3. A linear motor with a stable structure according to claim 2, characterized in that: The upper end of the support base (1) close to the two side core column parts (212) has a U-shaped boss (13) covering the outer sides of the two core column parts (212), and the two U-shaped bosses (13) are arranged facing each other.

4. A linear motor with a stable structure according to claim 3, characterized in that: The movable components (3) are divided into two groups. The movable components (3) further include a magnetic conductor (33). The magnetic conductor (33) is placed between the corresponding movable head (31) and the permanent magnet (32). The magnetic poles of the permanent magnets (32) of the two groups of movable components (3) are arranged in opposite directions.

5. A linear motor with a stable structure according to claim 4, characterized in that: Each movable head (31) has connecting parts (34) with openings facing each other at both sides of the lower end along the moving direction of the movable head, and the magnetic conductor (33) is disposed between the two corresponding connecting parts (34).

6. A linear motor with a stable structure according to claim 5, characterized in that: The spring assembly (4) comprises two groups, which are arranged at two sides of the movable head (31) along its moving direction. The spring assembly (4) comprises two support springs (41) respectively connected to the side ends of the two movable heads (31). The outer sides of the two support springs (41) are commonly connected to a coupling spring (42).

7. A linear motor with a stable structure according to claim 6, characterized in that: There is a gap between the coupling spring (42) and the supporting spring (41), and the coupling spring (42) comprises an upper horizontal portion (421) extending horizontally outward from the inner side of the upper end of the corresponding supporting spring (41), and a lower horizontal portion (422) is provided directly below the two upper horizontal portions (421), and the ends of the upper horizontal portion (421) and the lower horizontal portion (422) are connected to two openings and circular arc portions (423) arranged facing each other.

8. A structurally stable linear motor according to claim 7, characterized in that: There is a gap between the upper end of the support spring (41) and the corresponding connecting portion (34), and there is a gap between the lower end of the support spring (41) and the corresponding U-shaped boss (13).

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