CN218041158U

CN218041158U - Linear actuator and electric shearing device

Info

Publication number: CN218041158U
Application number: CN202222299453.1U
Authority: CN
Inventors: 叶洪新
Original assignee: Shenzhen Shuye Innovation Technology Co ltd
Current assignee: Shenzhen Shuye Innovation Technology Co ltd
Priority date: 2022-08-30
Filing date: 2022-08-30
Publication date: 2022-12-13
Anticipated expiration: 2032-08-30

Abstract

The embodiment of the application discloses a linear actuator and an electric shearing device, wherein the linear actuator comprises a shell, a base, a stator assembly and a rotor assembly suspended above the stator assembly, and the base, the stator assembly and the rotor assembly are arranged in the shell; the rotor assembly can reciprocate along a preset direction under the electromagnetic action of the rotor assembly and the stator assembly; the base extends along the preset direction, the lower end of the stator assembly is fixedly arranged on the base, the linear actuator further comprises two flexible connecting pieces, and two ends of the base are respectively connected to the shell in a hanging mode through the flexible connecting pieces. The utility model discloses the swing amplitude of the relative shell of linear actuator's flexonics spare is littleer, and whole shock attenuation effect is better.

Description

Linear actuator and electric shearing device

Technical Field

The application relates to the technical field of linear motors, in particular to a linear actuator and an electric shearing device.

Background

The linear actuator is also called a linear motor and mainly comprises a rotor assembly and a stator assembly, wherein the rotor assembly comprises a permanent magnet, the stator assembly comprises an electromagnet formed by winding coils on an iron core, and a certain gap is formed between the permanent magnet and the iron core coils. The permanent magnet of the reciprocating linear motor reciprocates at a certain frequency with respect to the iron core coil. When the reciprocating linear motor is used in an electric cutting device, such as a shaver, the biggest problems are that the vibration amplitude is large, the vibration sense is strong, and the user feel is poor.

In the related art, in order to reduce the vibration sense, the permanent magnet mounting frame is connected with the machine body through the flexible connecting piece, but the mass of the permanent magnet and the end of the tool bit is light, so that the swing amplitude of the flexible connecting piece is large, and the damping effect is poor.

The above is only for the purpose of assisting understanding of the technical solutions of the present invention, and does not represent an admission that the above is prior art.

SUMMERY OF THE UTILITY MODEL

In view of the above problems, the present invention provides a linear actuator, which aims to solve the technical problem of strong vibration of the linear actuator.

In order to achieve the above object, the present invention provides a linear actuator, which includes a housing, a base, a stator assembly, and a mover assembly suspended above the stator assembly, wherein the base, the stator assembly, and the mover assembly are disposed in the housing; wherein, the first and the second end of the pipe are connected with each other,

the rotor assembly can reciprocate along a preset direction under the electromagnetic action of the rotor assembly and the stator assembly;

the base extends along the preset direction, the lower end of the stator assembly is fixedly installed on the base, the linear actuator further comprises two flexible connecting pieces, and two ends of the base are respectively connected to the shell in a hanging mode through the flexible connecting pieces.

In an embodiment, the linear actuator further includes two sets of elastic suspension portions, and two ends of the mover assembly in the preset direction are respectively connected to the base through one set of elastic suspension portions.

In one embodiment, the flexible connecting piece is positioned at the outer side of the elastic suspension part, and the stator assembly is fixedly connected to the upper end or the middle part of the elastic suspension part; the lower end of the elastic suspension part is fixedly connected with the base, the upper end of the flexible connecting piece is fixedly connected with the shell, and the lower end of the flexible connecting piece is fixedly connected with the base.

In one embodiment, a length of the flexible coupling connected between the base and the housing is greater than or equal to a length of the elastic suspension connected between the mover assembly and the base.

In one embodiment, the flexible connecting member includes a plurality of longitudinal cantilevers connected to each other, upper ends of the plurality of longitudinal cantilevers are fixedly connected to the housing, and lower ends of the plurality of longitudinal cantilevers are fixedly connected to the base.

In an embodiment, the housing includes two opposite side frames extending along the predetermined direction, and two cross beams, the two side frames are respectively disposed on two sides of the stator assembly, the two cross beams are respectively disposed at two ends of the side frames, two ends of the cross beam are respectively detachably connected to upper ends of the two side frames, an upper end of the flexible connecting member is fixedly connected to the cross beam, and a lower end of the flexible connecting member is fixedly connected to the base.

In an embodiment, the linear actuator further includes a wire fixing clip for fixing the cable, the wire fixing clip is fixedly mounted at the bottom of the base, and the housing is provided with a moving space corresponding to the wire fixing clip.

In one embodiment, the stator assembly includes an iron core and a coil wound on the iron core, the iron core is fixedly connected to the base, and the cross section of the coil is rectangular.

The utility model also provides an electric shearing device, including linear actuator and tool bit subassembly, wherein, linear actuator includes shell, base, stator module and hangs the active cell subassembly above the stator module, the base, the stator module and the active cell subassembly are located in the shell; wherein the content of the first and second substances,

the base extends along the preset direction, the lower end of the stator assembly is fixedly arranged on the base, the linear actuator further comprises two flexible connecting pieces, and two ends of the base are respectively connected to the shell in a hanging mode through one flexible connecting piece;

and a rotor assembly of the linear actuator is connected with the cutter head assembly so as to drive the cutter head assembly to reciprocate.

In one embodiment, the sum of the masses of the cutter head assembly and the mover assembly is less than the sum of the masses of the stator assembly and the base.

The utility model discloses linear actuator passes through stator module fixed mounting in the base, the active cell subassembly hangs in stator module's top, make the both ends of base hang through a flexonics spare respectively and connect in the shell, compare in flexonics spare one end and connect the active cell subassembly, the scheme of shell is connected to the other end, the base adds the weight of active cell subassembly and is greater than the weight that the active cell subassembly adds the tool bit subassembly far away, make the initial acceleration that the active cell subassembly gave flexonics spare littleer, thereby the amplitude of oscillation of the relative shell of flexonics spare is littleer, the shock attenuation effect is better.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

Fig. 1 shows a schematic structural diagram of an embodiment of the linear actuator of the present invention;

FIG. 2 is an exploded view of the linear actuator of FIG. 1;

FIG. 3 is a top view of the linear actuator of FIG. 1;

FIG. 4 is a cross-sectional view taken along line IV-IV of FIG. 3;

FIG. 5 is a partial enlarged view of the portion A in FIG. 4;

fig. 6 is a schematic view of the linear actuator of fig. 1 at another angle.

The reference numbers illustrate:

reference numerals	Name (R)	Reference numerals	Name(s)	Reference numerals	Name (R)
						100	Linear actuator	120	Base seat	150	Flexible connecting piece
110	Outer casing	130	Stator assembly	151	Longitudinal cantilever
						111	Side frame	131	Iron core	160	Elastic suspension part
112	Cross beam	132	Coil	170	Wire fixing clamp
						113	Moving space	140	Mover assembly

The realization, the functional characteristics and the advantages of the utility model are further explained by combining the embodiment and referring to the attached drawings.

Detailed Description

The technical solutions in the embodiments of the present application will be described clearly and completely with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only some embodiments of the present application, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application. In addition, the technical solutions in the embodiments may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory to each other or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.

It should be noted that, if directional indications (such as up, down, left, right, front, and back) are involved in the embodiments of the present invention, the directional indications are only used for explaining the relative position relationship between the components in a specific posture, the motion condition, and the like, and if the specific posture is changed, the directional indications are changed accordingly.

In addition, if there is a description relating to "first", "second", etc. in the embodiments of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, the expression "and/or" as used throughout is meant to encompass three juxtaposed aspects, exemplified by "A and/or B" and encompasses either A aspect, or B aspect, or both A and B aspects.

The utility model provides a linear actuator.

In an embodiment of the present invention, referring to fig. 1 to 4, the linear actuator 100 includes a housing 110, a base 120, a stator assembly 130, and a mover assembly 140 suspended above the stator assembly 130, wherein the base 120, the stator assembly 130, and the mover assembly 140 are disposed in the housing 110. Wherein, the mover assembly 140 can reciprocate along a preset direction under the electromagnetic action of the mover assembly and the stator assembly 130; the base 120 extends along a predetermined direction, the lower end of the stator assembly 130 is fixedly mounted to the base 120, the linear actuator 100 further includes two flexible connectors 150, and both ends of the base 120 are respectively connected to the outer casing 110 through one flexible connector 150 in a hanging manner.

In this embodiment, the base 120 is used to provide a mount for the stator assembly 130. The base 120 is a long strip extending in a predetermined direction. The shape of the housing 110 may be various, and is not limited in particular, and the housing 110 forms a frame of the entire linear actuator 100 to protect the mover assembly 140 and the stator assembly 130, etc. The mover assembly 140 may specifically include a permanent magnet fixed to a mounting bracket, and two ends of the mounting bracket may be respectively connected to the base 120 or the housing 110 through a set of elastic suspensions 160, so that the mover assembly 140 is suspended above the stator assembly 130. The elastic suspension portion 160 may have many structures, for example, may be a plastic member, a plate spring, or the like, and the suspension mechanism of the mover assembly 140 is not particularly limited, but only needs to provide a certain elastic force and a certain supporting force. The stator assembly 130 specifically includes a core 131, a bobbin, and a coil 132, and the coil 132 is wound around the bobbin and mounted on the core 131 through the bobbin. The core 131 may be a U-shaped core 131, an E-shaped core 131, etc., and different types of cores 131 may be selected according to actual needs, which is not specifically limited herein.

The stator assembly 130 may be provided as only one set, and in this case, the mover assembly 140 may be provided as only one set or may be provided as two sets. When the mover assemblies 140 are arranged in two sets, the corresponding magnetic poles of the permanent magnets of the two sets of mover assemblies 140 are made to be opposite. Thus, the stator assembly 130 can drive the two sets of mover assemblies 140 to reciprocate in opposite directions. Of course, the stator assemblies 130 may also be arranged in two or more groups, when the stator assemblies 130 are arranged in two groups, the mover assemblies 140 are also arranged in two groups, each group of the mover assemblies 140 is arranged above the stator assembly 130, and then the two groups of the stator assemblies 130 respectively drive the corresponding stator assemblies 130 to reciprocate in opposite directions. The specific number of stator assemblies 130 and mover assemblies 140 is not limited herein and may be selected and designed according to the specific type of linear actuator 100.

After the coils 132 of the stator assembly 130 are supplied with alternating currents, the stator assembly 130 forms an electromagnet, and the stator assembly 130 drives the mover assembly 140 to reciprocate along a preset direction through the magnetic induction effect of the electromagnet and the permanent magnet. In practical use, the linear actuator 100 can drive the blades of the shearing apparatus to rapidly reciprocate by mounting the cutter head assembly on the mounting bracket of the mover assembly 140. The flexible connecting member 150 is made of an elastic material and has a certain rigidity. For example, the flexible connecting element 150 may be a plastic element. The flexible connecting member 150 may be fixedly connected to the base 120 and the housing by heat fusion, ultrasonic welding, screwing, or the like. It can be appreciated that the mass of the stator assembly 130 is substantially greater than the mass of the mover assembly 140.

The utility model discloses linear actuator 100 passes through stator module 130 fixed mounting in base 120, make the both ends of base 120 hang through a flexonics spare 150 respectively and connect in shell 110, compare in flexonics spare 150 one end connection active cell subassembly 140, the scheme of shell 110 is connected to the other end, base 120 adds the weight of stator module 130 and is greater than active cell subassembly 140 and adds the weight of tool bit subassembly far away, make the initial acceleration that active cell subassembly 140 gave flexonics spare 150 littleer, thereby the amplitude of oscillation of the relative shell 110 of flexonics spare 150 is littleer, the shock attenuation effect is better.

In one embodiment, the linear actuator 100 further includes two sets of elastic suspension portions 160, and both ends of the mover assembly 140 in the preset direction are respectively connected to the base 120 through one set of elastic suspension portions 160.

In the present embodiment, the elastic suspension portion 160 may have many structures, such as a metal sheet, a helical spring sheet, a plastic member, and the like, and is not limited herein. By having the mover assembly 140 coupled to the base 120 through the elastic suspensions 160, the weight of both the mover assembly 140 and the stator assembly 130 is pressed against the base 120. Therefore, when the mover assembly 140 reciprocates along the preset direction, the initial acceleration given to the flexible connector 150 by the mover assembly 140 is further reduced, so that the swing amplitude of the flexible connector 150 can be further reduced, and the shock absorption is effective. In addition, two ends of the mover assembly 140 are respectively connected to the base 120 through a set of elastic suspension portions 160, and two ends of the base 120 are suspended to the housing 110 through the flexible connectors 150, so that the vibration of the mover assembly 140 is transmitted to the base 120 through the elastic cantilever portions, and is transmitted to the flexible connectors 150 for further absorption after being absorbed by most of the stator assembly 130 on the base 120, and finally transmitted to the housing 110. In this way, the vibration of the whole linear actuator 100 is substantially absorbed by the stator assembly 130 and the flexible connecting member 150, so that the vibration of the whole housing 110 is greatly reduced, and the electric shearing apparatus using the linear actuator 100 of the present application has a weaker vibration sense and a more comfortable hand feeling.

Further, as shown in fig. 1 to 6, the flexible connection member 150 is located at an outer side of the elastic hanging portion 160, and the stator assembly 130 is fixedly connected to an upper end or a middle portion of the elastic hanging portion 160; the lower end of the elastic hanging part 160 is fixedly connected with the base 120, the upper end of the flexible connecting member 150 is fixedly connected with the outer shell 110, and the lower end is fixedly connected with the base 120.

In this embodiment, referring to fig. 4 and fig. 5 specifically, the motion trajectory of the mover assembly 140 is an arc trajectory taking a coil 132 point of the permanent magnet relative to the coil 132 of the core 131 as a center, and the motion trajectory of the stator assembly 130 is an arc trajectory taking a connection end point of the housing 110 and the flexible connector 150 as a center, and the trajectories of the two are exactly in opposite directions, so that when the mover assembly 140 horizontally reciprocates, the displacements of the two in the vertical direction can be partially or completely cancelled, that is, the up-and-down vibration of the whole mover assembly 140 and the stator assembly 130 is partially or completely cancelled, and is not transmitted to the housing 110. The use of the electric shearing apparatus using the linear actuator 100 is more comfortable, and is particularly apparent under high frequency vibrations. Optionally, the ratio of the sum of the masses of the tool bit assembly and the mover assembly 140 to the sum of the masses of the mover assembly 140 and the base 120 is 3 to 6. Thus, when the mover assembly 140 horizontally reciprocates, the displacements of the mover assembly 140 and the stator assembly 130 in the vertical direction are exactly offset, that is, the vertical vibration of the entire mover assembly 140 and the entire stator assembly 130 are offset, and the overall vibration is weak.

In one embodiment, referring to fig. 4 and 5, the length of the flexible connection 150 connected between the base 120 and the housing 110 is greater than or equal to the length of the elastic suspension 160 connected between the mover assembly 140 and the base 120.

In this embodiment, it should be noted that the length of the flexible connector 150 connected between the base 120 and the casing 110 is equal to the length of the elastic suspension 160 connected between the mover assembly 140 and the base 120, and the two lengths may be completely equal to each other, or may have an error of not greater than 5 mm. The length of the flexible connector 150 connected between the base 120 and the housing 110 is the effective swing length of the flexible connector 150. The elastic suspension 160 is coupled to a length between the mover assembly 140 and the base 120, i.e., an effective swing length of the elastic suspension 160. It will be appreciated that the longer the length of the flexible connector 150, the smaller its excursion. When the effective swing length of the flexible link 150 is smaller than the effective swing length of the elastic suspension portion 160, the vibration transmitted to the flexible link 150 by the base 120 causes the swing amplitude of the flexible link 150 to be large, thereby making the housing 110 feel strong. By making the effective swing length of the flexible connector 150 greater than or equal to the effective swing length of the elastic suspension portions 160, the swing amplitude of the flexible connector 150 is relatively smaller, and the vibration sensation of the housing 110 can be further reduced.

In one embodiment, as shown in fig. 1, 2 and 6, the flexible connecting member 150 includes a plurality of longitudinal cantilevers 151 connected to each other, wherein the upper ends of the plurality of longitudinal cantilevers 151 are fixedly connected to the housing 110, and the lower ends of the plurality of longitudinal cantilevers 151 are fixedly connected to the base 120.

In this embodiment, the overall shape of the flexible connecting member 150 may be various, for example, the flexible connecting member 150 may have a rectangular ring shape, a W shape, a U shape, or the like. The longitudinal cantilever 151 may be a straight arm, a curved arm, a serpentine arm, or the like. The number of longitudinal cantilevers 151 can also be selected and designed according to practical requirements, for example, each flexible connecting member 150 can include two, three, four, etc. longitudinal cantilevers 151. The upper/lower ends of the plurality of longitudinal cantilevers 151 may be directly connected or may be connected by a transverse cantilever, or one of the upper and lower ends of the plurality of cantilevers may be separated from each other and the other may be connected to each other, and the connection manner of the plurality of longitudinal cantilevers 151 is not particularly limited herein. The longitudinal cantilever 151 and the housing 110 and the base 120 may be attached by bonding, heat staking, ultrasonic welding, screws, etc. By making the flexible connection 150 include a plurality of longitudinal cantilevers 151 connected to each other, the effective swing length of the flexible connection 150 can be greatly increased, and the swing of the flexible connection 150 is further reduced, and the vibration of the housing 110 of the entire linear actuator 100 is further reduced.

In an embodiment, referring to fig. 1 to 6 again, the housing 110 includes two opposite side frames 111 and two cross beams 112 extending along a predetermined direction, the two side frames 111 are respectively disposed at two sides of the stator assembly 130, the two cross beams 112 are respectively disposed at two end portions of the side frames 111, two ends of the cross beam 112 are respectively detachably connected to upper ends of the two side frames 111, an upper end of the flexible connecting member 150 is fixedly connected to the cross beam 112, and a lower end of the flexible connecting member is fixedly connected to the base 120.

In this embodiment, the side frame 111 may have many forms, for example, the side frame 111 may have a plate-shaped structure, or may have a frame structure formed by connecting several arms, and is not limited in this embodiment. The cross beam 112 and the side frame 111 can be detachably and fixedly connected in a clamping, inserting and other modes. By making the two transverse ends detachably connected to the upper end of the side frame 111, the upper end of the flexible connecting member 150 is fixedly connected to the cross beam 112, and the lower end is fixedly connected to the base 120, which facilitates the connection of the flexible connecting member 150 to the base 120 and the housing 110. Specifically, the upper end of the flexible connecting member 150 is fixedly connected to the inner wall surface of the cross beam 112, and the lower end of the flexible connecting member 150 is fixedly connected to the outer wall surface of the cross beam 112, so that the flexible connecting member 150 is not easily detached from the housing 110 and the base 120 even if it swings for a long time.

In an embodiment, as shown in fig. 2, 4 and 6, the linear actuator 100 further includes a wire fixing clip 170 for fixing a cable, the wire fixing clip 170 is fixedly installed at the bottom of the base 120, and the housing 110 is provided with a moving space 113 corresponding to the wire fixing clip 170.

In this embodiment, the fixing clip 170 is fixedly installed at the bottom of the base 120, so as to further increase the weight of the base 120, further reduce the swing of the flexible connector 150, and make the fixing clip 170 adjacent to the coil 132, so as to facilitate wire fixing. The structure of the wire fixing clip 170 may be various, and will not be described in detail. The casing 110 is provided with a moving space 113 corresponding to the wire fixing clip 170, so that when the base 120 drives the wire fixing clip 170 to vibrate, the vibration will not be transmitted to the casing 110 through the wire fixing clip 170, thereby further reducing the vibration of the casing 110.

In an embodiment, referring to fig. 2 and 4, the stator assembly 130 includes a core 131 and a coil 132 wound around the core 131, the core 131 is fixedly connected to the base 120, and a cross section of the coil 132 is rectangular. The cross section of the coil 132 is rectangular, that is, the coil 132 is a flat coil 132, so that compared with a circular coil 132, the winding density can be greatly increased under the same size, the overall energy of the electromagnet can be improved, and the motor performance can be enhanced.

The utility model also provides an electric shearing device, this electric shearing device include tool bit subassembly and linear actuator 100, and the concrete structure of this linear actuator 100 refers to above-mentioned embodiment, and linear actuator 100's active cell subassembly 140 is connected with the tool bit subassembly to drive tool bit subassembly reciprocating motion, because this electric shearing device has adopted the whole technical scheme of above-mentioned all embodiments, consequently have all beneficial effects that the technical scheme of above-mentioned embodiment brought at least, no longer give unnecessary detail here.

The electric cutting device may be a shaver, a hair cutter, a hair trimmer, etc., and is not limited herein. When the linear actuator 100 has only one mover assembly 140, a movable blade and a stationary blade may be provided, such that the movable blade is connected to the mover assembly 140 of the linear actuator 100, and the movable blade is driven by the linear actuator 100 to reciprocate relative to the stationary blade, so as to achieve shearing. When the linear actuator 100 has two mover assemblies 140, the tool bit assembly includes two moving tool bits, and the two moving tool bits are respectively connected to the two mover assemblies 140, so that the linear actuator 100 drives the two moving tool bits to respectively perform a reverse reciprocating motion to realize shearing.

In one embodiment, the sum of the masses of the cutter head assembly and the mover assembly 140 is less than the sum of the masses of the base 120 and the stator assembly 130. Because one end of the flexible connector 150 is connected to the base 120 and the other end is connected to the housing 110, compared with a scheme that one end of the flexible connector 150 is connected to the mover assembly 140 and the other end is connected to the housing 110, the weight of the base 120 plus the stator assembly 130 is far greater than the weight of the mover assembly 140 plus the cutter head assembly, so that the initial acceleration given to the flexible connector 150 by the mover assembly 140 is smaller, and thus the swing of the flexible connector 150 relative to the housing 110 is smaller, which is more beneficial to shock absorption. The electric shearing device has more comfortable hand feeling in use and is particularly obvious under the condition of high-frequency vibration.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit the same; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art will understand that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the corresponding technical solutions in the embodiments of the present application.

Claims

1. A linear actuator comprises a shell, a base, a stator assembly and a rotor assembly suspended above the stator assembly, wherein the base, the stator assembly and the rotor assembly are arranged in the shell; it is characterized in that the preparation method is characterized in that,

the base extends along the preset direction, the lower end of the stator assembly is fixedly installed on the base, the linear actuator further comprises two flexible connecting pieces, and two ends of the base are connected to the shell in a hanging mode through the flexible connecting pieces respectively.

2. The linear actuator of claim 1, further comprising two sets of elastic suspensions, and wherein both ends of the mover assembly in the preset direction are connected to the base through one set of elastic suspensions, respectively.

3. The linear actuator of claim 2, wherein the flexible linkage is located outside of the elastic suspension, the stator assembly being fixedly attached to an upper or middle portion of the elastic suspension; the lower end of the elastic suspension part is fixedly connected with the base, the upper end of the flexible connecting piece is fixedly connected with the shell, and the lower end of the flexible connecting piece is fixedly connected with the base.

4. Linear actuator according to claim 3, ch a racterized i n that the length of the flexible connection between the base and the housing is larger than or equal to the length of the elastic suspension between the mover assembly and the base.

5. The linear actuator of any one of claims 1 to 4, wherein the flexible linkage comprises a plurality of interconnected longitudinal cantilevers, the plurality of longitudinal cantilevers having upper ends fixedly connected to the housing and lower ends fixedly connected to the base.

6. The linear actuator of claim 1, wherein the housing includes two opposite side frames extending along the predetermined direction and two cross beams, the side frames are respectively disposed at two sides of the stator assembly, the cross beams are respectively disposed at two ends of the side frames, two ends of the cross beam are respectively detachably connected to upper ends of the side frames, an upper end of the flexible connecting member is fixedly connected to the cross beam, and a lower end of the flexible connecting member is fixedly connected to the base.

7. The linear actuator according to any one of claims 1 to 4 and 6, further comprising a wire fixing clip for fixing a cable, wherein the wire fixing clip is fixedly mounted on the bottom of the base, and the housing is provided with a moving space corresponding to the wire fixing clip.

8. The linear actuator of claim 1, wherein the stator assembly includes a core and a coil wound around the core, the core being fixedly coupled to the base, the coil having a rectangular cross-section.

9. An electric shearing apparatus comprising a linear actuator according to any one of claims 1 to 8 and a cutter head assembly, wherein the rotor assembly of the linear actuator is connected to the cutter head assembly to reciprocate the cutter head assembly.

10. The electrical shearing apparatus as recited in claim 9, wherein a sum of the masses of said cutter head assembly and said mover assembly is less than a sum of the masses of a stator assembly and a base of said linear actuator.