A linear actuator includes a back fixture formed of a first part, a second part, and a plastic bearing, the first part connecting with the second part, grooves are disposed inside the first part and the second part, and extra structures are disposed outside the plastic bearing. The plastic bearing is secured inside the first part and the second part with the grooves and extra structures. The back fixture can be directly fitted onto a bed frame by applying a certain force to make an elastic deformation of this back fixture, thereby accelerating the installation of the actuator. This not only significantly reduces the noise caused by the connecting portion during the operation of the actuator, but also reduces the wearing of connecting parts, thereby significantly extending maintenance-free life.

An electromotive linear drive in the form of a dual drive adjust movably mounted parts of reclining and seating furniture. Two threaded spindles (2, 3) driven by a worm gear and which are arranged one behind the other and flush with one another for displacing a lifting element. Bearings are provided at both ends of each threaded spindle (2, 3). The bearings are designed as roller bearings (4, 5) having an inner ring (6) and an outer ring (7). The aim of the invention is to design an electromotive dual drive in such a way that a short overall length is achieved and that the stability of the structure is increased. Said aim is achieved by arranging an abutment between both roller bearings (4, 5), which accommodate the spindle ends, on which the roller bearings are supported on from both sides.

A transmission assembly includes a hollow spindle, an outer wall of which is provided with an outer thread; a transmission worm disposed in the hollow spindle; a first transmission nut which is thread-fitted with the transmission worm, wherein the hollow spindle is rotatably positioned relative to the first transmission nut in an axial direction, and an external portion of the first transmission nut is provided with a locking structure for limiting the first transmission nut from rotating; a second transmission nut which is thread-fitted with the hollow spindle; a bushing which is bushed outside of the hollow spindle, the second transmission nut being fixedly connected with the bushing; and a guide tube which is rotatably limited in the bushing.

A linear drive having a transmission housing and an electric motor which is accommodated in the transmission housing and drives a shaft with a worm. The shaft meshes with a worm gear which can be non-rotatably connected by way of a clutch to a spindle holder non-rotatably connected to a spindle. The clutch is biased by a spring and is adjustable by means of a clutch actuation. To permit simple and rapid operation of the clutch it is proposed that the clutch actuation includes a slide element which bears against the clutch and which is arranged non-rotatably but axially displaceably in relation to the clutch. A rotary element which is axially fixed but rotatable about an axis of rotation engages the slide element at an outside that faces away from the clutch. Run-on bevels of complementary configuration are provided between the slide element and the rotary element. The rotary element is actuable by way of a pulling element.

A linear actuator with an electric motor at one end and an electro-mechanical brake at the other, which is used to deploy and retract expandable rooms of recreational vehicles. When power is applied to the electro-mechanical brake, the leadscrew freewheels and allows manual compression of the actuator to return the expandable room to its highway travel position.

An adjustable strut that includes an outer housing configured to receive an extendable member, and an extending mechanism with a gear system configured to convert rotation motion of an input mechanism into linear translation of the extendable member.

Linear actuator system comprising a linear actuator and at least one box, such as a control box containing a control and possibly also a mains-based power supply or a battery box with a rechargeable battery pack. The linear actuator system further comprises a fastening means for the box, wherein the fastening means is constituted by an elongated item with a rectangular outline and a square cross-section. The box has a groove for receiving the fastening means. The fastening means and the groove are constituted with mutually interacting releasable locking connections. The fastening means can be designed as an independent item that can be fastened where the box is to be placed. The fastening means can also be used to interconnect two or more boxes by fastening the fastening means to a box. Alternatively, the fastening means can be formed as an integral part of the box. The fastening means can also be used to fasten a box to the outer tube on a linear actuator by fastening or, more expediently, by the fastening means being designed as an integral part of a tubular mounting bracket which is slid over an outer tube on the linear actuator.

A linear actuator system comprising a linear actuator having a housing and an outer tube, which with a rear end is secured to a side of the housing at a front end thereof. The outer tube surrounds an electric motor driven spindle unit and an activation element. The linear actuator system further comprises a control box having a control, where the control box is arranged in the angle between the housing and the outer tube on the linear actuator. The control box is fastened with a mounting bracket to the outer tube on the linear actuator. The mounting bracket comprises a tubular portion, whereby it can be pushed in over the outer tube and the mounting bracket and the control box are also designed with interacting fastening means for fastening the control box to the mounting bracket. The tubular portion of the mounting bracket has an axially extending slit and the interacting fastening means between the mounting bracket and the control box are constituted on both sides of the slit. The interacting fastening means are designed such that when the control box is fastened onto the mounting bracket, the slit contracts so that the tubular portion of the mounting bracket tightens around the outer tube on the linear actuator. The construction is characterized in that the control box is only fastened to the mounting bracket on the outer tube of the linear actuator. This simplifies the fastening quite considerably while simultaneously simplifying the design.

A drive apparatus according to an embodiment includes a first rotation unit, a base, a lead screw unit, and a second rotation unit. The first rotation unit includes a gear rotatable in first directions by a drive power source. The base is joined to the gear and is rotatable in the first directions with the gear. The lead screw unit is provided to the base and moves a shaft back and forth in a certain direction. The second rotation unit is pivotally supported by the base, rotates in second directions different from the first directions, and supports a certain supported member rotatably in the second directions.

A linear actuator is described comprising an actuator housing, a driven element moveable at a front end of the linear actuator and a mounting (4) at a rear end of the linear actuator, wherein the mounting (4) comprises two arms (9,10) and an accommodation space (11) between the two arms (9,10). The object underlying the invention is to provide a linear actuator which can easily be mounted with its rear mounting. To this end, at least one arm (9,10) is provided with a lever (12,13) which is rotatable about an axis between an open position and a closed position, wherein in the closed position, an end portion (14,16) of the lever (12,13) at least partly closes an opening (18) between the two arms (9,10) and in the open position makes the opening (18) accessible.