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Linear actuator

A technology for linear actuators and driving motors, which is applied in the direction of transmissions, transmission parts, belts/chains/gears, etc., which can solve the problems of limited internal space and large space occupation of linear actuators, and achieve large thrust, The effect of increasing torque

Pending Publication Date: 2018-09-11
ZHEJIANG JIECHANG LINEAR MOTION TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Many of the existing linear actuators on the market are equipped with a release mechanism between the transmission parts. The purpose of the release mechanism is that when the drive motor loses power, the nut can reversely drive the screw to rotate. The currently disclosed release mechanism is usually through The clutch between two coupling parts is realized, but the internal space of the linear actuator is very limited, adding two additional coupling parts to realize the clutch will take up a lot of space

Method used

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Embodiment 1

[0051] like Figure 1 to Figure 9 As shown, this embodiment is a linear actuator. In this embodiment, the linear actuator includes a driving motor 1, a transmission worm 2, a worm wheel 3, a screw 4, and a nut 5. The driving motor 1 is connected to the transmission worm 2, and the transmission The worm 2 drives the worm wheel 3 to rotate, the worm wheel 3 rotates to drive the screw 4 to rotate, and the screw 4 rotates to drive the nut 5 to move axially. In addition, the present embodiment also includes a casing 6, an outer tube 7, and an inner tube 8. The nut 5 It is connected with the inner tube 8, the shell 6 is connected with the outer tube 7, the driving motor 1 is fixedly installed in the shell 6, and the axial movement of the nut 5 is ultimately expressed as the axial relative displacement between the inner tube 8 and the outer tube 7.

[0052] In this embodiment, a planetary gear 12 assembly is also provided between the worm wheel 3 and the screw rod 4, for details, see...

Embodiment 2

[0104] The difference between this embodiment and Embodiment 1 is that, in the first embodiment, a brake worm is used to brake the inner ring gear. A suit of an inner ring gear outer torsion spring, directly pulls the inner ring gear outer torsion spring through the cable to realize the radial contraction or radial expansion of the inner ring gear outer torsion spring, when the inner ring gear outer torsion spring radially contracts , will brake the ring gear, which is an alternative to the brake in the first embodiment.

Embodiment 3

[0106] The difference between this embodiment and Embodiment 1 is that the structure of the one-way locking coupling between the worm and the screw is different. In this embodiment, the transmission torsion spring is set between the first dial and the second dial In the sheet, the damping ring is set inside the transmission torsion spring. In other words, the damping ring is located on the innermost side, the first paddle and the second paddle are located on the outermost side, and the transmission torsion spring is located on the damping ring and the first paddle. , between the second paddle.

[0107] The bending pins of the transmission torsion spring in this embodiment are bent radially outward. When the first paddle transmits torque to the transmission torsion spring, the bending pins are moved toward the direction of loosening the transmission torsion spring. And when the second paddle transmits torque to the transmission torsion spring, the bent pin is moved towards the ...

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Abstract

The invention discloses a linear actuator. The linear actuator comprises a drive motor, a transmission worm, a worm wheel, a lead screw, a nut, a planetary gear assembly and a brake the drive motor isconnected with the transmission worm, the transmission worm drives the worm wheel to rotate, the worm wheel rotate to drives the lead screw to rotate, and the lead screw rotate to drives the nut to move axially. The planetary gear assembly is arranged between the worm wheel and the lead screw, the planetary gear assembly comprises an inner gear ring, a sun gear, a planetary gear and a planet carrier, the sun gear and the worm wheel rotate synchronously, and the planet carrier and the lead screw rotate synchronously. The brake is used for braking the inner gear ring and comprises an outer gearring. The linear actuator has the advantages that when the planetary gear assembly is used for increasing the thrust, release is performed by the planetary gear assembly, and the structure design ismore compact.

Description

【Technical field】 [0001] The invention relates to a linear actuator and belongs to the technical field of linear transmission. 【Background technique】 [0002] Linear actuators, also known as electric push rods, are widely used in furniture, medical equipment, solar power generation, etc. The main structure includes a drive motor, a drive worm, a worm wheel, a screw, and a nut. The working principle is that the drive motor drives the drive worm Rotation, the transmission worm meshes with the worm wheel to drive the worm wheel to rotate, the worm wheel to drive the screw to rotate, the screw to rotate to drive the nut to move axially, the nut is generally connected to the inner tube, so as to realize the telescopic movement of the inner tube. [0003] Many of the existing linear actuators on the market are equipped with a release mechanism between the transmission parts. The purpose of the release mechanism is that when the drive motor loses power, the nut can reversely drive ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16H37/12F16H25/20F16H35/00F16H57/10
CPCF16H25/20F16H37/124F16H57/10F16H2025/2084F16H2025/2087F16H2025/209F16H2025/2071F16H2035/005
Inventor 陆小健胡仁昌翟鑫石鑫邢科亮
Owner ZHEJIANG JIECHANG LINEAR MOTION TECH
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