LINEAR ACTUATOR

• US 20150143934A1
• Filed: 12/26/2013
• Published: 05/28/2015
• Est. Priority Date: 11/28/2013
• Status: Active Grant

• Current Assignee: TiMOTION Technology Co., Ltd.
• Original Assignee: TiMOTION Technology Co., Ltd.
• Inventors: WU, Chou-Hsin
• Granted Patent: US 9,528,580 B2
• Time in Patent Office: Days
• US Class Current: 74/89.29
• CPC Class Codes: A47C 20/041 by electric motors
• CPC Class Codes: A61G 7/018 Control or drive mechanisms
• CPC Class Codes: F16H 2025/2059 Superposing movement by two screws, e.g. with opposite thread direction telescopic screws with three screw members F16H25/2056
• CPC Class Codes: F16H 2025/2084 Perpendicular arrangement of drive motor to screw axis
• CPC Class Codes: F16H 2025/209 using worm gears
• CPC Class Codes: F16H 25/20 Screw mechanisms with automatic reversal F16H25/12
• CPC Class Codes: Y10T 74/18624 Plural inputs, single output

Abstract

A linear actuator includes a housing (100), a base plate (200) disposed in the housing (100), and two actuating mechanisms (310, 320) disposed on the base plate (200) and received in the housing (100). Each actuating mechanism (310/320) comprises a motor (311/321), a transmission assembly (312/322), a screw rod (313/323), and a supporting block (314/324). Two motors (311, 321) and two transmission assemblies (312, 322) are disposed on the base plate (200). Two motors (311, 321) are kinetically connected to two assemblies (312, 322), respectively. One end of the screw rod (313/323) is connected to and rotated by the transmission assemblies (312/322). The other end of the screw rod (313/323) is screwed to the supporting block (314/324). Thus, two supporting blocks (314, 324) are driven to move in the housing (100).

Claims

1. A linear actuator, comprising:

a housing (100);

a base plate (200) disposed in the housing (100); and

two actuating mechanisms (310, 320) disposed on the base plate (200) and received in the housing (100), each of the two actuating mechanisms (310, 320) comprising a motor (311/321), a transmission assembly (312/322), a screw rod (313/323), and a supporting block (314/324), wherein two motors (311/321) and two transmission assemblies (312, 322) are disposed on the base plate (200), the two motors (311, 321) are kinetically connected to the two transmission assemblies (312, 322), respectively, one end of the screw rod (313/323) is connected to and rotated by the transmission assembly (312/322), the other end of the screw rod (313/323) is screwed to the supporting block (314/324), and two supporting blocks (314, 324) are driven to move in the housing (100).

2. The linear actuator according to claim 1, wherein two tracks (110, 120) are formed in the housing (100), the two actuating mechanisms (310, 320) are configured to the two tracks (110, 120), respectively, and the two supporting blocks (314, 324) are received in the two tracks (110, 120), respectively.

3. The linear actuator according to claim 2, wherein two screw rods (313, 323) are disposed coaxially with the two tracks (110, 120), respectively.

4. The linear actuator according to claim 2, wherein the two tracks (110, 120) are disposed coaxially with each other.

5. The linear actuator according to claim 1, wherein the motor (311/321) of the actuating mechanism (310, 320) and the transmission assembly (312/322) are disposed on one of opposite sides of the base plate (200).

6. The linear actuator according to claim 5, wherein the motor (311/321) comprises a driving shaft (315/325) penetrating the base plate (200) to be connected to the transmission assembly (312/322).

7. The linear actuator according to claim 1, further comprising two linkage assemblies (410, 420), each of which being pivoted to the housing (100), wherein one end of each linkage assembly (410/420) is located outside the housing (100), and the other end of the each linkage assembly (410/420) is located inside the housing (100) and pressed against one of the two supporting blocks (314, 324).

8. The linear actuator according to claim 2, further comprising two linkage assemblies (410, 420), each of which being corresponding to a corresponding track (110/120) and being pivoted to the housing (100), wherein one end of each linkage assembly (410/420) is located outside the housing (100), and the other end of the each linkage assembly (410/420) is located inside the housing (100) and configured at one end of the corresponding track (110/120).

9. The linear actuator according to claim 8, wherein each linkage assembly (410/420) comprises a pivot (411/421) penetrating through and being pivoted to the housing (100), wherein the pivot (411/421) extends radially to form an outer linkage (412/422) located outside the housing (100) and an inner linkage (413/423) located inside the housing (100) and configured at one end of the corresponding track (110/120) to be pressed against by a corresponding supporting block (314/324) in the corresponding track (110, 120).

10. The linear actuator according to claim 9, wherein the outer linkage (412/422) is connected to a supporting plate (414/424).

11. The linear actuator according to claim 1, wherein the base plate (200) is connected to the housing (100) by screws.