Linear actuating device

Abstract

The embodiment of the utility model discloses a linear actuating device which comprises a shell, a motor, a connecting block, an output shaft and a conductive structure. The shell is provided with a through hole; the motor is located in the shell and comprises a stator and a rotor, the stator is fixedly connected with the shell, and the rotor can be driven by the stator to linearly move; the connecting block is located in the shell, and the connecting block is fixedly connected with the rotor; the output shaft is arranged on the connecting block, and the connecting block can linearly move along with the stator so as to drive the output shaft to stretch out and draw back through the through hole. The conductive structure is connected with the output shaft and the connecting block, a wire is arranged in the shell, one end of the wire is connected with the connecting block, the other end of the wire is connected with the shell, and the output shaft is communicated with the shell sequentially through the conductive structure, the connecting block and the wire. The linear actuating device is small in electrostatic discharge resistance value and reasonable and compact in structure.

Description

Technical Field

[0001] The present application relates to the field of motor technology, and in particular to a linear actuating device. Background Art

[0002] In modern industry and automation, actuators (such as motors and servo systems) are widely used in various machines and equipment to achieve precise motion control. These actuators typically contain one or more output shafts, which can generate static electricity during operation due to mechanical movements such as friction, contact, and separation. The accumulation of static electricity can cause a variety of problems, including decreased device performance, data transmission errors, and even equipment damage.

[0003] While existing technologies have implemented some measures to reduce the generation and accumulation of static electricity, these measures are still insufficient in some cases. Static electricity on the output shaft is particularly problematic in high-speed or high-precision applications. For example, in precision instruments, semiconductor manufacturing equipment, medical devices, and aerospace, static electricity can cause serious operational errors or equipment failure.

[0004] In the prior art, a bearing or other supporting structure is generally provided between the output shaft and the slider that drives it to move, and discharge is performed through the supporting structure. However, the internal resistance of these supporting structures is large, which is not conducive to electrostatic discharge and is therefore not suitable for scenarios where a smaller electrostatic discharge resistance value is required.

[0005] For example, in bearings, the contact area between the rolling elements and the inner and outer rings is relatively small, which restricts the flow path of current and increases resistance.

[0006] Furthermore, the output shaft of the actuator is often required to move at high speeds, which makes it difficult to mount a static eliminator directly on the shaft.

[0007] Therefore, there is an urgent need for a linear actuator with a small electrostatic discharge resistance value and a reasonable and compact structure. Summary of the Invention

[0008] The purpose of the present application is to provide a linear actuator with a small electrostatic discharge resistance value and a compact and stable structure.

[0009] To achieve the above-mentioned purpose, an embodiment of the present application provides a linear actuator device, including a shell, a motor, a connecting block, an output shaft and a conductive structure; the shell has a through hole; the motor is located in the shell, the motor includes a stator and a mover, the stator is fixedly connected to the shell, and the mover can move linearly under the drive of the stator; the connecting block is located in the shell, and the connecting block is fixedly connected to the mover; the output shaft is provided on the connecting block, and the connecting block can move linearly following the stator to drive the output shaft to perform telescopic movement through the through hole; the conductive structure is respectively connected to the output shaft and the connecting block, a wire is provided in the shell, one end of the wire is connected to the connecting block, and the other end of the wire is connected to the shell, and the output shaft is connected to the shell in sequence through the conductive structure, the connecting block and the wire.

[0010] In some embodiments of the present application, the connecting block is provided with a connecting hole, the output shaft is partially inserted into the connecting block and extends into the connecting hole, and the conductive structure is inserted into the connecting hole and electrically connected to the output shaft.

[0011] In some embodiments of the present application, the output shaft is rotatably disposed on the connecting block, and the output shaft is always electrically connected to the conductive structure when rotating.

[0012] In some embodiments of the present application, the conductive structure includes a fixing seat and a brush fixedly connected to the fixing seat, the fixing seat is electrically connected to the connecting block, and the brush is rotatably electrically connected to the output shaft.

[0013] In some embodiments of the present application, a slip ring is mounted on the output shaft. The slip ring can rotate along with the output shaft, and the slip ring is rotatably electrically connected to the brush filament.

[0014] In some embodiments of the present application, two brush filaments are provided, and the two brush filaments are symmetrically arranged.

[0015] In some embodiments of the present application, the linear actuating device further includes a rotation drive assembly, which is located in the housing, fixedly connected to the connecting block, and drives the output shaft to rotate.

[0016] In some embodiments of the present application, a first conductive area is provided on the inner wall of the shell, the wire is electrically connected to the first conductive area, and a second conductive area is provided on the outer wall of the shell for electrically connecting to an external conductive structure.

[0017] In some embodiments of the present application, the housing has a mounting portion, and the first conductive area is located on the mounting portion.

[0018] In some embodiments of the present application, both the first conductive region and the second conductive region are bare surfaces.

[0019] Compared with the prior art, in the linear actuator device of the embodiment of the present application, the output shaft is arranged on the connecting block, the conductive structure is respectively connected to the output shaft and the connecting block, the connecting block is connected to one end of the wire, and the other end of the wire is connected to the shell, and the output shaft is connected to the shell through the conductive structure, the connecting block and the wire in sequence, so that the static electricity on the output shaft can be transmitted to the external conductive structure through the conductive structure, the connecting block, the wire and the shell in sequence to realize electrostatic discharge, so that the electrostatic discharge resistance value of the linear actuator device of the present application is small and the structure is reasonable and compact. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments of the present application. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work.

[0021] Figure 1 2 is a perspective view of a linear actuator according to an embodiment of the present application.

[0022] Figure 2 for Figure 1 A perspective view of the linear actuator is shown with part of the housing hidden.

[0023] Figure 3 for Figure 2 Partial exploded view shown.

[0024] Figure 4 for Figure 1 A three-dimensional diagram of the output shaft, conductive structure, and slip ring assembly connection in the linear actuator is shown. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application.

[0026] In the description of this application, it should be noted that the terms "inner" and "outer" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, or the orientations or positional relationships in which the product of this application is typically placed when in use. These terms are intended solely to facilitate the description of this application and simplify the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first" and "second" and the like are used solely for distinction and should not be construed as indicating or implying relative importance.

[0027] It should also be noted that, unless otherwise expressly specified or limited, the terms "disposed" and "connected" should be understood broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to direct connections, indirect connections through an intermediate medium, or internal connections between two components. Those skilled in the art will understand the specific meanings of these terms in this application based on the specific circumstances.

[0028] The linear actuator device of the embodiment of the present application includes a housing, a motor, a connecting block and an output shaft; the housing has a through hole; the motor is located in the housing, the motor includes a stator and a mover, the stator is fixedly connected to the housing, and the mover can move linearly under the drive of the stator; the connecting block is located in the housing, and the connecting block is fixedly connected to the mover; the output shaft is provided on the connecting block, and the connecting block can move linearly following the stator to drive the output shaft to perform telescopic movement through the through hole; wherein, a conductive structure is provided on the connecting block, and the conductive structure is respectively connected to the output shaft and the connecting block, and the connecting block is also connected to one end of the wire, and the other end of the wire is connected to the housing, so that the output shaft is connected to the housing through the conductive structure, the connecting block and the wire in sequence.

[0029] The output shaft is partially passed through the connecting block, a mounting groove is provided on the connecting block, the conductive structure is arranged in the mounting groove, and the conductive structure is also connected to the output shaft through the mounting groove.

[0030] The output shaft is rotatably arranged on the connecting block, and the conductive structure is rotatably connected to the output shaft.

[0031] The conductive structure includes a fixing seat and a brush fixedly connected to the fixing seat. The fixing seat is fixedly connected to the connecting block, and the brush is rotatably connected to the output shaft.

[0032] The conductive structure also includes a slip ring, which is sleeved on the output shaft and can rotate along with the output shaft. The slip ring is rotationally connected to the brush wire.

[0033] There are two brush wires, which are symmetrically arranged.

[0034] The linear actuator further includes a rotary drive assembly, which is located in the housing and fixedly connected to the connecting block. The rotary drive assembly drives the output shaft to rotate.

[0035] In some embodiments of the present application, a first conductive area is provided on the inner side of the shell, the wire is connected to the first conductive area, and a second conductive area is provided on the outer side of the shell for connecting to an external conductive structure.

[0036] In some embodiments of the present application, the housing has a mounting portion, and the first conductive area is located on the mounting portion.

[0037] In some embodiments of the present application, both the first conductive region and the second conductive region are bare surfaces.

[0038] Compared with the prior art, in the linear actuator device of the embodiment of the present application, the output shaft is arranged on the connecting block, and a conductive structure is provided on the connecting block. The conductive structure is connected to the output shaft and the connecting block respectively. The connecting block is also connected to one end of the wire, and the other end of the wire is connected to the shell. The output shaft is connected to the shell through the conductive structure, the connecting block and the wire in sequence, so that the static electricity on the output shaft is transmitted to the external conductive structure through the conductive structure, the connecting block, the wire and the shell in sequence, so that the linear actuator device of the present application has a small electrostatic discharge resistance value and a reasonable and compact structure.

[0039] See also Figure 1-4 The linear actuator 100 of the embodiment of the present application includes a housing 10, a motor 20, a connecting block 30, an output shaft 40 and a conductive structure 50; the housing 10 has a through hole 11; the motor 20 is located in the housing 10, and the motor 20 includes a stator 21 and a mover 22, the stator 21 is fixedly connected to the housing 10, and the mover 22 can move linearly under the drive of the stator 21; the connecting block 30 is located in the housing 10, and the connecting block 30 is fixedly connected to the mover 22; the output shaft 40 is provided on the connecting block 30, and the connecting block 30 can move linearly following the stator 21 , to drive the output shaft 40 to perform telescopic movement through the through hole 11; the conductive structure 50 is respectively connected to the output shaft 40 and the connecting block 30, and a wire 60 is provided in the housing 10, one end of the wire 60 is connected to the connecting block 30, and the other end of the wire 60 is connected to the housing 10, so that the output shaft 40 is connected to the housing 10 through the conductive structure 50, the connecting block 30 and the wire 60 in sequence, thereby allowing the static electricity and / or current on the output shaft 40 to be transferred to the external conductive structure through the conductive structure 50, the connecting block 30, the wire 60 and the housing 10 in sequence. More specifically, as follows:

[0040] like Figure 3-4 As shown, the connection block 30 is provided with a connection hole 30a, the output shaft 40 is partially inserted into the connection block 30 and extends into the connection hole 30a, the conductive structure 50 is inserted into the connection hole and electrically connected to the output shaft 40, so that the structure between the connection block 30, the output shaft 40 and the conductive structure 50 is reasonable and compact, and the output shaft 40 is connected to the outside of the connection block through the wire structure 50, while ensuring a reliable connection, further reducing the influence of the resistance between the inside and outside of the connection block 30. Specifically, as Figure 3-4 As shown, the wire structure 50 is inserted into the connection hole 30a and fixedly connected to the connection block 30a by bolts, so that the structure between the connection block 30 and the wire structure 50 is more reasonable and compact, but not limited to this.

[0041] like Figure 2-3As shown, the output shaft 40 is rotatably disposed on the connecting block 30 . The output shaft 40 is always electrically connected to the conductive structure 50 when rotating, thereby preventing poor electrical connection between the output shaft 40 and the conductive structure 50 due to high-speed rotation.

[0042] like Figure 3-4 As shown, the conductive structure 50 includes a fixing base 51 and a brush filament 52. The brush filament 52 is fixedly connected to the fixing base 51, so that the fixing base 51 and the brush filament 52 are electrically connected and provide stable support for the brush filament 52. The fixing base 51 is electrically connected to the connecting block 30, and the brush filament 52 is rotatably electrically connected to the output shaft 40, further ensuring a stable and reliable electrical connection between the conductive structure 50 and the rotating output shaft 40, and making the conductive structure 50 reasonably compact. It is understood that the fixing base 51 is fixedly connected to the connecting block 30 by bolts to ensure a stable and reliable electrical connection between the fixing base 51 and the connecting block 30, but this is not limited to this.

[0043] like Figure 4 As shown, a slip ring 70 is mounted on the output shaft 40 and rotates with the output shaft 40. The slip ring 70 is rotatably electrically connected to the brush filament 52 to further ensure a reliable and stable electrical connection between the output shaft 40 and the conductive structure 50 during rotation. Preferably, the slip ring 70 and the output shaft 40 have an interference fit to reduce resistance at the connection between the slip ring 70 and the output shaft 40, thereby preventing excessive resistance due to poor contact, but the present invention is not limited thereto.

[0044] like Figure 3-4 As shown, two brushes 52 are provided, and the two brushes 52 are symmetrically arranged to facilitate cooperation with the rotating output shaft 40 to ensure reliable connection.

[0045] like Figure 2-3 As shown, the linear actuator 100 further includes a rotary drive assembly 80 . The rotary drive assembly 80 is located in the housing 10 and is fixedly connected to the connecting block 30 so that the rotary drive assembly 80 drives the output shaft 40 to rotate.

[0046] like Figure 1-3 As shown, a first conductive area 10a is provided on the inner wall of the housing 10 so that the wire 60 is electrically connected to the first conductive area 10a, thereby ensuring that the electrical connection structure between the wire 60 and the housing 10 is simple and compact; specifically, one end of the wire 60 is fixed to the first conductive area 10a by a bolt, ensuring that the connection between the wire 60 and the first conductive area 10a is simple and compact, but the present invention is not limited to this.

[0047] like Figure 1-3 As shown, the outer wall of the housing 10 is provided with a second conductive area 10b for electrically connecting to an external conductive structure, thereby conducting static electricity or current on the housing 10 to the external conductive structure. Figure 1As shown, the housing 10 has a mounting portion 12 , and the first conductive region 10 a is located on the mounting portion 12 , so that when the linear actuator 100 is mounted on an external structure through the mounting portion 12 , electrical conduction between the housing 10 and the external structure is simultaneously achieved.

[0048] For example, the first conductive region 10a and the second conductive region 10b are both bare surfaces, ie, plain surfaces without coating or surface treatment, to prevent the coating or surface treatment layer from increasing the resistance between the housing 10 and the external conductive structure.

[0049] like Figure 3 As shown, the wire 60 is fixedly connected to the connection block 30 by bolts to ensure that the electrical connection between the wire 60 and the connection block 30 is simple and reliable.

[0050] For example, under the premise of ensuring the electrical conductivity, in order to further ensure the reliability of the output shaft 40 under high load or high speed operation, the output shaft 40 is made of steel material, such as but not limited to carbon steel, alloy steel, etc.

[0051] For example, to ensure the conductive performance of the conductive structure, the slip ring 70 is made of copper.

[0052] For example, under the premise of ensuring the conductive performance, in order to further reduce the weight of the connection block 30, the connection block 30 is made of aluminum.

[0053] Compared with the prior art, in the linear actuator device 100 of the embodiment of the present application, the output shaft 40 is arranged on the connecting block 30, the conductive structure 50 is respectively connected to the output shaft 40 and the connecting block 30, the connecting block 30 is connected to one end of the wire 60, and the other end of the wire 60 is connected to the housing 10. The output shaft 40 is connected to the housing 10 through the conductive structure 50, the connecting block 30 and the wire 60 in sequence, so that the static electricity or current on the output shaft 40 can be transmitted to the external conductive structure 50 through the conductive structure 50, the connecting block 30, the wire 60 and the housing 10 in sequence, thereby realizing electrostatic discharge, so that the linear actuator device 100 of the present application has a small electrostatic discharge resistance value and a reasonable and compact structure.

[0054] The above description is merely an embodiment of the present application and is not intended to limit the scope of protection of the present application. For those skilled in the art, various modifications and variations of the present application are possible. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application shall be included in the scope of protection of the present application.

Claims

1. A linear actuator, characterized in that: The linear actuator comprises: a housing having a through hole; a motor located in the housing, the motor comprising a stator and a mover, the stator being fixedly connected to the housing, and the mover being capable of linear motion driven by the stator; A connecting block is located in the housing and is fixedly connected to the mover; an output shaft, disposed on the connecting block, wherein the connecting block can move linearly with the stator to drive the output shaft to perform telescopic movement through the through hole; and A conductive structure is provided, wherein the conductive structure is connected to the output shaft and the connecting block respectively, a wire is provided in the shell, one end of the wire is connected to the connecting block, and the other end of the wire is connected to the shell, and the output shaft is connected to the shell through the conductive structure, the connecting block and the wire in sequence.

2. The linear actuator according to claim 1, wherein: The connecting block is provided with a connecting hole, the output shaft is partially inserted into the connecting block and extends into the connecting hole, and the conductive structure is inserted into the connecting hole and electrically connected to the output shaft.

3. The linear actuator according to claim 2, wherein: The output shaft is rotatably disposed on the connecting block, and the output shaft is always electrically connected to the conductive structure when rotating.

4. The linear actuator according to claim 3, wherein: The conductive structure includes a fixing seat and a brush fixedly connected to the fixing seat, the fixing seat is electrically connected to the connecting block, and the brush is rotatably electrically connected to the output shaft.

5. The linear actuator according to claim 4, wherein: The output shaft is sleeved with a slip ring, which can rotate along with the output shaft, and the slip ring is rotatably electrically connected to the brush filament.

6. The linear actuator according to claim 4, wherein: There are two brush filaments, and the two brush filaments are symmetrically arranged.

7. The linear actuator according to claim 3, wherein: The linear actuating device further includes a rotation drive assembly, which is located in the housing and fixedly connected to the connecting block, and drives the output shaft to rotate.

8. The linear actuator according to claim 1, wherein: The inner wall of the shell is provided with a first conductive area, the wire is electrically connected to the first conductive area, and the outer wall of the shell is provided with a second conductive area for electrically connecting to an external conductive structure.

9. The linear actuator according to claim 8, wherein: The housing has a mounting portion, and the first conductive area is located on the mounting portion.

10. The linear actuator according to claim 8, wherein: The first conductive region and the second conductive region are both bare surfaces.

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