Classifications

• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
  • F16H—GEARING
  • F16H25/00—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms
  • F16H25/18—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms for conveying or interconverting oscillating or reciprocating motions
  • F16H25/20—Screw mechanisms
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
  • F16H—GEARING
  • F16H25/00—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms
  • F16H25/18—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms for conveying or interconverting oscillating or reciprocating motions
  • F16H25/20—Screw mechanisms
  • F16H25/24—Elements essential to such mechanisms, e.g. screws, nuts
  • F16H25/2418—Screw seals, wipers, scrapers or the like
• • H—ELECTRICITY
  • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • H02K—DYNAMO-ELECTRIC MACHINES
  • H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
  • H02K7/06—Means for converting reciprocating motion into rotary motion or vice versa
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
  • F16H—GEARING
  • F16H25/00—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms
  • F16H25/18—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms for conveying or interconverting oscillating or reciprocating motions
  • F16H25/20—Screw mechanisms
  • F16H2025/2031—Actuator casings
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
  • F16H—GEARING
  • F16H25/00—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms
  • F16H25/18—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms for conveying or interconverting oscillating or reciprocating motions
  • F16H25/20—Screw mechanisms
  • F16H2025/2037—Actuator supports or means for fixing piston end, e.g. flanges
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
  • F16H—GEARING
  • F16H25/00—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms
  • F16H25/18—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms for conveying or interconverting oscillating or reciprocating motions
  • F16H25/20—Screw mechanisms
  • F16H2025/2062—Arrangements for driving the actuator
  • F16H2025/2075—Coaxial drive motors
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
  • F16H—GEARING
  • F16H25/00—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms
  • F16H25/18—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms for conveying or interconverting oscillating or reciprocating motions
  • F16H25/20—Screw mechanisms
  • F16H2025/2062—Arrangements for driving the actuator
  • F16H2025/2087—Arrangements for driving the actuator using planetary gears

Definitions

• the present invention relates to a linear actuator comprising a housing with an electric motor, which through a transmission drives a spindle unit comprising a spindle with a spindle nut and an adjustment element, typically tubular, driven by the spindle unit, and where the actuator further comprises a rear mounting, typically arranged in a rear end of the housing, and a front mounting in the free end of the adjustment element, and where the rear mounting and the front mounting are equipped with an eye for a pin for mounting of the linear actuator.
• the actuators are typically equipped with a rear mounting in the rear end of the housing and a front mounting in the outer end of the activation element, also known as the inner tube.
• the rear mounting is typically a fork mounting while the front mounting typically is a cylindrical projection with an eye secured to the outer end of the activation element.
• Such an example is shown in EP 662 573 Al to Linak. It is however understood that the type of front and rear mounting can be adapted to the specific structure in which the linear actuator should be incorporated.
• the front and rear mounting shown in the linear actuators of EP 531 247 Al to Linak and EP 0 831 250 A2 to Dana Corporation are thus both a cylindrical projection with an eye.
• the linear actuator of DE 94 04 383.3 Ul to Dewert Antriebs- und Systemtechnik has a fork mounting as both front and rear mounting.
• a loose pin, bolt, shaft, locking ring or the like is inserted into a bracket on the structure in which the linear actuator should be incorporated and led through the eye in the front or rear mounting.
• the purpose of the invention is to provide a linear actuator as described in the preamble, which eases the mounting thereof.
• the front mounting and/or the rear mounting is moulded from plastic, where the pin is moulded as one with the entrance of the eye.
• the pin can simply be loosened with a light knock on the end of the pin and be guided into the eye of the bracket on the structure in which the linear actuator should be mounted.
• the front mounting and/or the rear mounting is a cylindrical projection with an eye.
• the activation element is tubular, and the front mounting is provided in the frontmost free end thereof.
• the activation element with front mounting and pin can be moulded in plastic as one single unit.
• the front mounting and/or the rear mounting is a fork mounting, where the pin likewise is moulded as one with the entrance of the eye in one side of the fork mounting.
• the fork mounting is constructed as an integrated part of the rear part of the housing as the side walls as two flanges are guided past the end wall in the housing, and in the two elongated side walls there is a transverse eye for a pin.
• Fig. 1 shows an exploded view of a linear actuator
• fig. 2 shows a longitudinal section through the linear actuator of fig. 1
• fig. 3 shows a fork mounting with a pin.
• the linear actuator shown in the drawing comprises a housing 1 consisting of a front half la and a rear half lb.
• a mounting unit 2 for an electric motor 3 is embedded, a transmission 6 in the form of a planetary gear and a spindle unit.
• the electric motor 3 drives a spindle 7 through a planetary gear 6.
• the planetary gear 6 comprises a sun wheel 8 on the front end of the shaft of the motor 3.
• the rear wall of the recess is equipped with two opposite toothed wheel sets 9 in engagement with the sun wheel 8.
• Moulded as one with each toothed wheel 9 is a planetary wheel 10 in engagement with a ring wheel 11 mounted on the rear end, the shaft of the spindle 7.
• a ball bearing 12 is provided on the rear end of the spindle 7, in front of the ring wheel 11, a ball bearing 12 is provided on the rear end of the spindle 7, in front of the ring wheel 11, a ball bearing 12 is provided on the rear end of the spindle 7, in front of the ring wheel 11, a ball bearing 12 is provided on the rear end of the spindle 7, in front of the ring wheel 11, a ball bearing 12 is provided on the rear end of
• the outer end, the free end of the spindle 7, is equipped with an activation element 13 in the form of a length of tube.
• the end of the activation element 13, which is positioned over the spindle 7, is internally provided with threads 14, which constitute the spindle nut for engagement with the external threads of the spindle 7.
• the outer end, the free end of the activation element 13, is equipped with a front mounting 15 for mounting of the actuator.
• the activation element 13 with internal threads (spindle nut), collar 16 and front mounting 15 is moulded in plastic as one single unit.
• the activation element 13 protrudes out through a hole 17 in the front end of the housing 1, where the hole 17 is constructed as a guide for the activation element 13, just as the hole 17 can be equipped with a sealing for preventing dirt and liquid from the outside from entering into the actuator.
• the front mounting 15 is a fork mounting with a transverse eye 15a for a pin 18 for fixation of the front mounting 15 in the structure in which the linear should be mounted.
• a rear mounting 19 is likewise a fork mounting. This is constructed as an integrated part of the rear half lb of the housing 1 as the side walls as two flanges are guided past the end wall in the housing 1, and in the two elongated side walls there is a transverse eye l9a for a pin 18 for fixation of the rear mounting. With the invention is thus provided a linear actuator which is easier to mount that the previously known constructions of linear actuators.

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• Engineering & Computer Science (AREA)
• General Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Power Engineering (AREA)
• Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
• Transmission Devices (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=65520029

Family Applications (1)

Country Status (2)

Citations (4)

Family Cites Families (2)

• 2019
  • 2019-01-11 WO PCT/DK2019/000010 patent/WO2019137587A1/en active Application Filing
  • 2019-01-11 CN CN201910026450.0A patent/CN110030350B/zh active Active

Patent Citations (4)

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