Dual-axis linear actuator

Abstract

The utility model provides a double-axis linear actuator, and relates to the field of linear actuators. The double-axis linear actuator comprises a shell, two linear motors, two output shafts, two connecting assemblies and two elastic pieces. The linear motors are arranged on the two sides of the shell respectively, and the two output shafts are parallel and penetrate through two through holes in the shell. The output shaft is located between the two linear motors, and the connecting assembly is connected with the linear motors and the output shaft; the two elastic pieces are arranged in the axial direction of the output shaft. One elastic piece is connected to one connecting assembly and located between the linear motor and the output shaft which are connected with the elastic piece; the other elastic piece is connected to the other connecting assembly and located between the linear motor connected with the other connecting assembly and the output shaft. The connecting assembly is driven by the linear motor to drive the output shaft connected with the connecting assembly to stretch out of and retract into the shell through the corresponding through hole. The biaxial linear actuator provided by the utility model has the characteristic of compact structure.

Description

TECHNICAL FIELD

[0001] The utility model relates to linear actuator field, specifically, relate to a kind of double-shaft linear actuator. BACKGROUND

[0002] In existing engineering applications, when multiple shafts need to be processed, the commonly used solution is to install two parallel motors for operation, but this will occupy a large space. SUMMARY

[0003] The utility model aims to, for example, provide a kind of double-shaft linear actuator, it has the characteristics of small space occupation.

[0004] Embodiments of the utility model can be implemented as follows:

[0005] The utility model discloses a kind of double-shaft linear actuator, the double-shaft linear actuator includes shell, two linear motors, two output shafts, two connecting components and two elastic pieces;The two linear motors are respectively arranged in the two sides in the shell, the two output shafts are arranged in parallel, the shell is opened with the two through holes corresponding to the two output shafts, the two output shafts are correspondingly placed in the two through holes, and can be respectively extended out of the shell by the corresponding through hole;The two output shafts are located between the two linear motors, one connecting component connects one linear motor and one output shaft connection, another connecting component connects another linear motor and another output shaft connection;The two elastic pieces are located in the shell, and are connected with the shell;The two elastic pieces are arranged along the axial direction of the output shaft;One elastic piece is connected to one connecting component, and is located between the linear motor and the output shaft connected thereto;Another elastic piece is connected to another connecting component, and is located between the linear motor and the output shaft connected thereto;Any connecting component can be driven by the linear motor connected thereto to move along a straight line, to drive the output shaft connected thereto to extend and retract the shell through the corresponding through hole along the axial direction of the output shaft.

[0006] Further, in optional embodiments, the elastic piece is a magnetic spring, and the magnetic spring is arranged in overlap with the connecting component.

[0007] Further, in optional embodiments, the connecting component is provided with a mounting groove, the mounting groove extends along the axial direction of the output shaft, and the magnetic spring is embedded in the mounting groove.

[0008] Further, in an optional embodiment, the connecting assembly comprises a connecting piece and a sleeve pressing piece, the connecting piece is connected with the linear motor and the output shaft respectively, the mounting groove is arranged on the connecting piece, and the sleeve pressing piece is arranged on the connecting piece and located at the opening of the mounting groove, so as to press the sleeve of the magnetic force spring embedded in the mounting groove.

[0009] Further, in an optional embodiment, the connecting assembly further comprises a sleeve limiting piece, the mounting groove extends along the axial direction of the output shaft and penetrates through the connecting piece, and the sleeve limiting piece is arranged on the connecting piece and located at one end of the mounting groove away from the through hole.

[0010] Further, in an optional embodiment, the dual-shaft linear actuator further comprises a circuit board arranged in the housing, the circuit board is electrically connected with the linear motor, the linear motor comprises a motor rotor and a motor stator, the bracket of the motor rotor is fixedly connected with the connecting assembly, the coil of the motor rotor is at least partially exposed outside the motor stator and electrically connected with the circuit board, and the motor stator is fixedly connected with the housing.

[0011] Further, in an optional embodiment, the dual-shaft linear actuator further comprises a homing sensor, the homing sensor is fixed to the connecting assembly and / or the bracket of the motor rotor, the homing sensor is located between the magnetic force spring and the motor stator and on the side of the connecting assembly close to the motor stator, the homing sensor is arranged in overlap with the coil of the motor rotor and electrically connected with the circuit board.

[0012] Further, in an optional embodiment, the circuit board is fixed to the connecting assembly and / or the bracket of the motor rotor, the circuit board is located between the magnetic force spring and the motor stator and on the side of the connecting assembly close to the motor stator, and the circuit board is arranged in overlap with the coil of the motor rotor.

[0013] Further, in an optional embodiment, the circuit board is electrically connected with the linear motor through a circuit flat cable, and the dual-shaft linear actuator further comprises a flat cable guide, the flat cable guide is located on the side of the connecting assembly close to the motor stator, the flat cable guide is fixedly connected with the connecting assembly and used for limiting and guiding the circuit flat cable.

[0014] Further, in an optional embodiment, the dual-shaft linear actuator further comprises a linear encoder, which is located on the side of the connecting assembly away from the magnetic spring and on the side of the magnetic spring close to the linear motor, the linear encoder comprises an encoder ruler and a sensor, the encoder ruler is fixedly connected with the connecting assembly, and the sensor is fixedly connected with the shell; and / or,

[0015] The dual-shaft linear actuator further comprises a guide assembly, which is located on the side of the connecting assembly away from the magnetic spring and corresponds to the position of the magnetic spring; the guide assembly comprises a sliding block and a guide rail, the guide rail extends along the axial direction of the output shaft, the guide rail is fixedly connected with the connecting assembly, and the sliding block is slidably arranged on the guide rail, and the sliding block is fixedly connected with the shell; and / or,

[0016] The dual-shaft linear actuator further comprises a rotary driving assembly, which is connected with the connecting assembly and is used for driving the output shaft to rotate; and / or,

[0017] The dual-shaft linear actuator further comprises an air suction assembly, which is located between the two output shafts, the output shaft is provided with a first air channel, the shell is provided with a second air channel, and the air suction assembly is in air communication with the first air channel and the second air channel, respectively.

[0018] The dual-shaft linear actuator has the following beneficial effects: the dual-shaft linear actuator has two linear motors, the two linear motors are installed on the two sides in the shell, the connecting assembly and the output shaft are both two, the output shaft is connected with the linear motor through the connecting assembly, two through holes are arranged on the shell, the two output shafts correspond to the two through holes one by one, and the two output shafts extend out of the corresponding through holes or retract into the shell under the action of the linear motor. The dual-shaft linear actuator provided in the embodiment has two output shafts and can simultaneously process multiple shafts. Compared with the scheme in the prior art that two motors are arranged side by side for operation, the dual-shaft linear actuator provided in the embodiment has the characteristics of more compact structure and smaller space occupation, and can be arranged more flexibly. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical scheme of the embodiment of the utility model, the following will be briefly introduced the drawings needed to be used in the embodiment. It should be understood that the following drawings only show some embodiments of the utility model, and therefore should not be regarded as a limitation on the scope. For ordinary skilled in the art, other related drawings can be obtained without creative labor according to these drawings.

[0020] Figure 1The structure schematic view of the double-shaft linear actuator is described in the embodiment of the utility model.

[0021] Figure 2 For Figure 1 The structure schematic view of the double-shaft linear actuator is described in the embodiment of the utility model.

[0022] Figure 3 The structure schematic view of the double-shaft linear actuator is described in the embodiment of the utility model.

[0023] Figure 4 The structure schematic view of the double-shaft linear actuator is described in the embodiment of the utility model.

[0024] Figure 5 For Figure 3 The structure schematic view of the double-shaft linear actuator is described in the embodiment of the utility model.

[0025] Figure 6 For Figure 5 The structure schematic view of the double-shaft linear actuator is described in the embodiment of the utility model.

[0026] Icon: 10, double-shaft linear actuator;11, shell;111, through hole;12, linear motor;121, motor mover;122, motor stator;13, output shaft;14, connecting assembly;140, mounting groove;141, connecting piece;142, sleeve pressing piece;143, sleeve limiting piece;15, elastic piece;16, circuit board;160, circuit wire;17, direction sensor;18, wire guiding piece;19, linear encoder;191, encoding ruler;192, sensor;20, guiding assembly;201, sliding block;202, guide rail;21, rotary driving assembly;22, air suction assembly;221, first air channel;222, second air channel. DETAILED DESCRIPTION

[0027] In order to make the above object, features and advantages of the utility model more obvious and easy to understand, the specific embodiments of the utility model will be described in detail below with reference to the drawings.

[0028] In order to make the above object, features and advantages of the utility model more obvious and easy to understand, the specific embodiments of the utility model will be described in detail below with reference to the drawings.

[0029] Therefore, the following detailed description of the embodiments of the application provided in the drawings is not intended to limit the scope of the application claimed, but merely represents selected embodiments of the application. Based on the embodiments in the application, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of the application.

[0030] It should be noted that: similar reference numbers and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0031] It should be noted that the features in the embodiments of the application can be combined with each other without conflict.

[0032] The specific embodiments of the application will be described in detail below with reference to the accompanying drawings.

[0033] Please refer to Figures 1 to 6 , the embodiment provides a double-shaft linear actuator 10, which has the characteristics of compact structure.

[0034] As Figures 1 to 3 shown, the double-shaft linear actuator 10 includes a housing 11, two linear motors 12, two output shafts 13, two connecting assemblies 14 and two elastic members 15; the two linear motors 12 are arranged on both sides of the housing 11 respectively, the two output shafts 13 are arranged in parallel, the housing 11 is provided with two through holes 111 corresponding to the two output shafts 13, the two output shafts 13 are correspondingly arranged in the two through holes 111 and can respectively extend out of the housing 11 through the corresponding through holes 111; the two output shafts 13 are located between the two linear motors 12, one connecting assembly 14 connects one linear motor 12 and one output shaft 13, and the other connecting assembly 14 connects the other linear motor 12 and the other output shaft 13; the two elastic members 15 are located in the housing 11 and connected with the housing 11; the two elastic members 15 are arranged along the axial direction of the output shaft 13; one elastic member 15 is connected to one connecting assembly 14 and located between the linear motor 12 and the output shaft 13 connected thereto; the other elastic member 15 is connected to the other connecting assembly 14 and located between the linear motor 12 and the output shaft 13 connected thereto; any connecting assembly 14 can move linearly under the drive of the linear motor 12 connected thereto, so as to drive the output shaft 13 connected thereto to extend out of and retract into the housing 11 through the corresponding through hole 111 along the axial direction of the output shaft 13.

[0035] That is to say, in the embodiment of the utility model, the double shaft linear actuator 10 has two linear motors 12, the two linear motors 12 are installed on both sides in the casing 11 respectively, and the connecting assembly 14 and the output shaft 13 are both two, the output shaft 13 is connected with the linear motor 12 through the connecting assembly 14 respectively, two through holes 111 are arranged on the casing 11, the two output shafts 13 correspond to the two through holes 111 one by one, under the action of the linear motor 12, the two output shafts 13 extend out of the corresponding through hole 111 or retract into the casing 11 from the corresponding through hole 111. The double shaft linear actuator 10 provided by the embodiment of the utility model has two output shafts 13, and multiple shaft machining can be simultaneously performed. Compared with the scheme that two motors are used for parallel operation in the prior art, the double shaft linear actuator 10 provided by the embodiment of the utility model has the characteristics of more compact structure and smaller space occupation, and can be arranged more flexibly.

[0036] It should be pointed out that in the embodiment, the two linear motors 12, the two output shafts 13, the two connecting assemblies 14 and the two elastic members 15 are arranged in axial symmetry, and in the following description, one set of linear motor 12, output shaft 13, connecting assembly 14 and elastic member 15 are described in detail, and the other set of linear motor 12, output shaft 13, connecting assembly 14 and elastic member 15 can be referred to the corresponding setting, so it is not described.

[0037] In addition, it should be pointed out that the two output shafts 13 of the double shaft linear actuator 10 provided by the embodiment of the utility model can also be connected with a rotary motor in transmission, and the output shaft 13 is driven to rotate by the rotary motor. The number of the rotary motor is two, and it is connected with the two output shafts 13 correspondingly.

[0038] In the optional embodiment, the elastic member 15 is a magnetic spring, and the magnetic spring is arranged in overlap with the connecting assembly 14, so as to reduce the space occupation in the width direction. It should be understood that the embodiment of the utility model arranges two linear motors 12 in the casing 11, in order to reduce the space occupation in the width direction, the magnetic spring is arranged in overlap with the connecting assembly 14, which can reduce the overall width. Alternatively, the magnetic spring is arranged above the connecting assembly 14 in the manner of overlap between the magnetic spring and the connecting assembly 14.

[0039] As shown in the figure, further, the connecting assembly 14 is provided with a mounting groove 140, the mounting groove 140 extends along the axial direction of the output shaft 13, and the magnetic spring is embedded in the mounting groove 140. The mounting groove 140 can fix the magnetic spring, and the groove structure can reduce the space occupation in the thickness direction, so as to make the overall structure more compact.

[0040] As shown in the figure, in the optional embodiment, the connecting assembly 14 comprises a connecting piece 141 and a sleeve pressing piece 142, the connecting piece 141 is connected with the linear motor 12 and the output shaft 13 respectively, a mounting groove 140 is opened on the connecting piece 141, the sleeve pressing piece 142 is arranged on the connecting piece 141 and located at the opening of the mounting groove 140, so as to press the sleeve of the magnetic force spring embedded in the mounting groove 140. Further, the connecting assembly 14 can also comprise a sleeve limiting piece 143, the mounting groove 140 extends to the connecting piece 141 along the axial direction of the output shaft 13, and the sleeve limiting piece 143 is arranged on the connecting piece 141 and located at the end of the mounting groove 140 away from the through hole 111. The sleeve limiting piece 143 limits the sleeve of the magnetic force spring arranged in the mounting groove 140, and the inventor has found through long-term research that the sleeve of the magnetic force spring is subjected to greater force at the end away from the through hole 111, so that the sleeve limiting piece 143 arranged at the end of the mounting groove 140 away from the through hole 111 can ensure that the sleeve of the magnetic force spring is stably arranged on the connecting piece 141, thereby ensuring the stability and reliability of the overall structure.

[0041] As shown in the figure, in the optional embodiment, the dual-shaft linear actuator 10 further comprises a circuit board 16 located in the housing 11, the circuit board 16 is electrically connected with the linear motor 12, the linear motor 12 comprises a motor rotor 121 and a motor stator 122, the bracket of the motor rotor 121 is fixedly connected with the connecting assembly 14, the coil of the motor rotor 121 is at least partially exposed outside the motor stator 122 and electrically connected with the circuit board 16, and the motor stator 122 is fixedly connected with the housing 11. Exposing the coil of the motor rotor 121 at least partially outside the motor stator 122 can provide space for the installation of other components, reduce the space occupation of other components in the width direction, so that the dual-shaft linear actuator 10 occupies less space.

[0042] As shown in the figure, the dual-shaft linear actuator 10 further comprises a phase sensor 19217, the phase sensor 19217 is fixed to the connecting assembly 14 and / or the bracket of the motor rotor 121, the phase sensor 19217 is located between the magnetic force spring and the motor stator 122 and on the side of the connecting assembly 14 close to the motor stator 122, the phase sensor 19217 is arranged in overlap with the coil of the motor rotor 121 and electrically connected with the circuit board 16. Arranging the phase sensor 19217 in overlap with the coil of the motor rotor 121 can reduce the space occupation of the phase sensor 192 in the width direction. Optionally, in the embodiment, the phase sensor 19217 is located above the coil of the motor rotor 121.

[0043] As shown in the figure, in the embodiment, the circuit board 16 is fixed to the bracket of the connecting assembly 14 and / or the motor mover 121, the circuit board 16 is located between the magnetic spring and the motor stator 122, and is located on the side of the connecting assembly 14 close to the motor stator 122, and the circuit board 16 is arranged in overlap with the coil of the motor mover 121.

[0044] In an optional embodiment, the circuit board 16 is electrically connected with the linear motor 12 through the circuit flat cable 160, and the biaxial linear actuator 10 further comprises a flat cable guide 18, the flat cable guide 18 is located on the side of the connecting assembly 14 close to the motor stator 122, and the flat cable guide 18 is fixedly connected with the connecting assembly 14, and is used for limiting and guiding the circuit flat cable 160. The circuit flat cable 160 is arranged in a meandering shape, and the flat cable guide 18 can avoid the circuit flat cable 160 from interfering with other components during movement. It should be noted that the rotary motor can also be electrically connected with the circuit board 16 through the circuit flat cable 160.

[0045] In an optional embodiment, the biaxial linear actuator 10 further comprises a linear encoder 19, the linear encoder 19 is located on the side of the connecting assembly 14 away from the magnetic spring, and is located on the side of the magnetic spring close to the linear motor 12. The linear encoder 19 is located on the side of the magnetic spring close to the linear motor 12, which can make the structure more reasonable and compact, and facilitate electrical connection with the above-mentioned meandering circuit flat cable 160. In the embodiment, the linear encoder 19 comprises an encoding ruler 191 and a sensor 192, the encoding ruler 191 is fixedly connected with the connecting assembly 14, and the sensor 192 is fixedly connected with the housing 11.

[0046] In an optional embodiment, the biaxial linear actuator 10 further comprises a guide assembly 20, the guide assembly 20 is located on the side of the connecting assembly 14 away from the magnetic spring, and corresponds to the position of the magnetic spring, so that the structure is more reasonable and compact. In the embodiment, the guide assembly 20 comprises a sliding block 201 and a guide rail 202, the guide rail 202 extends along the axial direction of the output shaft 13, the guide rail 202 is fixedly connected with the connecting assembly 14, and the sliding block 201 is slidably arranged on the guide rail 202, and the sliding block 201 is fixedly connected with the housing 11.

[0047] In an optional embodiment, the biaxial linear actuator 10 further comprises a rotary driving assembly 21, the rotary driving assembly 21 is connected with the connecting assembly 14, and the rotary driving assembly 21 is used for driving the output shaft 13 to rotate.

[0048] In an optional embodiment, the biaxial linear actuator 10 further comprises an air suction assembly 22, the air suction assembly 22 is located between the two output shafts 13, a first air channel 221 is formed in the output shaft 13, a second air channel 222 is formed in the housing 11, and the air suction assembly 22 is in air communication with the first air channel 221 and the second air channel 222 respectively.

[0049] Please refer to Figures 1 to 6 The double-shaft linear actuator 10 provided by the embodiment has two linear motors 12, which are respectively installed on two sides in a shell 11, and the connecting assemblies 14 and the output shafts 13 are both two, the output shafts 13 are respectively connected with the linear motors 12 through the connecting assemblies 14, two through holes 111 are arranged on the shell 11, the two output shafts 13 correspond to the two through holes 111 one by one, and the two output shafts 13 extend out of the corresponding through holes 111 or retract into the shell 11 under the action of the linear motors 12. The double-shaft linear actuator 10 provided by the embodiment has two output shafts 13 and can simultaneously perform multiple shaft machining. Compared with the scheme in the prior art that two motors are arranged side by side to work, the double-shaft linear actuator 10 provided by the embodiment has the characteristics of more compact structure and smaller space occupation, and can be more flexibly arranged.

[0050] It should be noted that, in the description of the utility model, the terms "upper", "lower", "inner", "outer", "left", "right" and the like indicate the orientation or positional relationship shown in the drawings, or the orientation or positional relationship commonly used when the utility model product is used, or the orientation or positional relationship commonly understood by those skilled in the art, and are merely intended to facilitate the description of the utility model and simplify the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the utility model.

[0051] In addition, the terms "first", "second" and the like are merely used for differentiation in description and cannot be understood as indicating or implying relative importance.

[0052] It should also be noted that, in the description of the utility model, unless otherwise explicitly specified and limited, the terms "arranged", "connected" and the like should be understood in a broad sense, for example, "connected" can be fixed connection, can also be detachable connection, or integrally connected; can be mechanical connection, can also be electrical connection; can be direct connection, can also be indirect connection through an intermediate medium, or can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0053] Although the utility model discloses as above, the utility model is not limited to this. Any person skilled in the art, without departing from the spirit and scope of the utility model, can make various changes and modifications, therefore the protection scope of the utility model should be limited by the range defined by the claims.

Claims

1. A dual-axis linear actuator, comprising: The double-shaft linear actuator comprises a housing, two linear motors, two output shafts, two connecting assemblies and two elastic members; the two linear motors are arranged on two sides of the housing respectively, the two output shafts are arranged in parallel, two through holes corresponding to the two output shafts are formed on the housing, the two output shafts are arranged in the two through holes respectively and can extend out of the housing through the corresponding through hole; the two output shafts are located between the two linear motors, one connecting assembly connects one linear motor and one output shaft, and the other connecting assembly connects the other linear motor and the other output shaft; the two elastic members are located in the housing and connected with the housing; the two elastic members are arranged along the axial direction of the output shaft; one elastic member is connected to one connecting assembly and located between the linear motor and the output shaft connected by the connecting assembly; the other elastic member is connected to the other connecting assembly and located between the linear motor and the output shaft connected by the connecting assembly; any connecting assembly can move linearly under the drive of the linear motor connected by the connecting assembly to drive the output shaft connected by the connecting assembly to extend out of and retract into the housing through the corresponding through hole along the axial direction of the output shaft.

2. The dual-axis linear actuator of claim 1, wherein, The elastic member is a magnetic force spring, and the magnetic force spring is arranged in overlap with the connecting assembly.

3. The dual-axis linear actuator of claim 2, wherein, The connecting assembly is provided with a mounting groove extending along the axial direction of the output shaft, and the magnetic force spring is embedded in the mounting groove.

4. The dual-axis linear actuator of claim 3, wherein, The connecting assembly comprises a connecting piece and a sleeve compression piece, the connecting piece is connected with the linear motor and the output shaft respectively, the mounting groove is formed on the connecting piece, and the sleeve compression piece is arranged on the connecting piece and located at the opening of the mounting groove to compress the sleeve of the magnetic force spring embedded in the mounting groove.

5. The dual-axis linear actuator of claim 4, wherein, The connecting assembly further comprises a sleeve limiting piece, the mounting groove extends along the axial direction of the output shaft to penetrate through the connecting piece, and the sleeve limiting piece is arranged on the connecting piece and located at one end of the mounting groove away from the through hole.

6. The dual-axis linear actuator of any of claims 2-5, wherein, The double-shaft linear actuator further comprises a circuit board located in the housing, the circuit board is electrically connected with the linear motor, the linear motor comprises a motor rotor and a motor stator, the bracket of the motor rotor is fixedly connected with the connecting assembly, the coil of the motor rotor is at least partially exposed outside the motor stator and electrically connected with the circuit board, and the motor stator is fixedly connected with the housing.

7. The dual-axis linear actuator of claim 6, wherein, The double-shaft linear actuator further comprises a direction sensor, the direction sensor is fixed to the connecting assembly and / or the bracket of the motor rotor, the direction sensor is located between the magnetic force spring and the motor stator and on the side of the connecting assembly close to the motor stator, the direction sensor is arranged in overlap with the coil of the motor rotor and electrically connected with the circuit board.

8. The dual-axis linear actuator of claim 6, wherein, The circuit board is fixed to the support of the connecting assembly and / or the motor stator, and is located between the magnetic force spring and the motor stator and on the side of the connecting assembly close to the motor stator, and overlaps the coil of the motor stator.

9. The dual-axis linear actuator of claim 8, wherein, The circuit board is electrically connected to the linear motor through a circuit wire, and the double-shaft linear actuator further comprises a wire guide, which is located on the side of the connecting assembly close to the motor stator and is fixedly connected to the connecting assembly for limiting and guiding the circuit wire.

10. The dual-axis linear actuator of any of claims 2-5, wherein, The double-shaft linear actuator further comprises a linear encoder, which is located on the side of the connecting assembly away from the magnetic force spring and on the side of the magnetic force spring close to the linear motor, and comprises an encoding ruler and a sensor, wherein the encoding ruler is fixedly connected to the connecting assembly, and the sensor is fixedly connected to the shell; and / or, The double-shaft linear actuator further comprises a guide assembly, which is located on the side of the connecting assembly away from the magnetic force spring and corresponds to the position of the magnetic force spring; the guide assembly comprises a sliding block and a guide rail, the guide rail extends along the axial direction of the output shaft, the guide rail is fixedly connected to the connecting assembly, the sliding block is slidably arranged on the guide rail, and the sliding block is fixedly connected to the shell; and / or, The double-shaft linear actuator further comprises a rotary driving assembly, which is connected to the connecting assembly and is used to drive the output shaft to rotate; and / or, The double-shaft linear actuator further comprises an air suction assembly, which is located between the two output shafts, a first air duct is formed in the output shaft, and a second air duct is formed in the shell, and the air suction assembly is in air communication with the first air duct and the second air duct, respectively.

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