An article conveying equipment includes: a carrying apparatus, configured to carry one or more articles to be transported; a travelling apparatus, where the travelling apparatus includes at least two driving wheels located at the bottom of the travelling apparatus, the at least two driving wheels are configured to control the travelling apparatus to rotate in a first rotation direction; and a rotation supporting apparatus, which is located between the carrying apparatus and the travelling apparatus and connected to the carrying apparatus and the travelling apparatus respectively, where the rotation supporting apparatus is configured to rotate in a direction opposite to the first rotation direction when the travelling apparatus rotates in the first rotation direction.

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 jack includes a first sleeve, a second sleeve disposed at least partially within the first sleeve, a third sleeve disposed at least partially within the second sleeve, and a translating screw disposed at least partially within the third sleeve. The linear jack may further include a cover sleeve coupled to the translating screw. The first sleeve is threadedly coupled to the second sleeve. The third sleeve is threadedly coupled to the translating screw. The translating screw may be disposed at least partially within the cover sleeve. The cover sleeve may be configured to translate with the translating screw.

A linear jack includes a first sleeve, a second sleeve disposed at least partially within the first sleeve, a third sleeve disposed at least partially within the second sleeve, and a translating screw disposed at least partially within the third sleeve. The linear jack may further include a cover sleeve coupled to the translating screw. The first sleeve is threadedly coupled to the second sleeve. The third sleeve is threadedly coupled to the translating screw. The translating screw may be disposed at least partially within the cover sleeve. The cover sleeve may be configured to translate with the translating screw.

A jack stand apparatus enables operators to screw adjust a load support column relative to a column support base for fully completing load-bearing distances between loads and opposed support surfacing, and thus improving safety of jack stand applications. The various embodiments of the jack stand apparatus according to the present invention may all be said to comprise a shaft support structure, a shaft construction, a pawl assembly, and a screw mechanism. In the preferred embodiment, the shaft construction is a screw type element and includes external threads. A pawl element is cooperable with the external threads, and the screw shaft construction is telescopically positionable relative to the shaft support structure for engaging an overlying load. The pawl element is engagable with the helical threads for preventing downward movement of the screw shaft construction relative to the shaft support structure for supporting loads thereupon.

A shoe tying support assembly includes a frame that is positionable on a floor. A scissor lift is movably coupled to the frame and the scissor lift is actuatable between a lifted position and a lowered position. A platform is positioned on the scissor lift and the platform is spaced upwardly from the frame when the scissor lift is actuated into the lifted position. Thus, a user can position their foot on the platform for assisting with tying shoes. A tilting unit is coupled between the scissor lift and the platform and the tilting unit tilts the platform at a selectable angle of deflection from a horizontal plane to enhance comfort for the user to position the user's foot on the platform. A remote control is provided to remotely control the scissor lift and the tilting unit.

A shoe tying support assembly includes a frame that is positionable on a floor. A scissor lift is movably coupled to the frame and the scissor lift is actuatable between a lifted position and a lowered position. A platform is positioned on the scissor lift and the platform is spaced upwardly from the frame when the scissor lift is actuated into the lifted position. Thus, a user can position their foot on the platform for assisting with tying shoes. A tilting unit is coupled between the scissor lift and the platform and the tilting unit tilts the platform at a selectable angle of deflection from a horizontal plane to enhance comfort for the user to position the user's foot on the platform. A remote control is provided to remotely control the scissor lift and the tilting unit.

The present jack apparatus is particularly adapted for heavy duty lifting. The jack apparatus includes a base; a pair of screw jacks; a yoke supported by the screw jacks; a lifting tube supported on the yoke; a shaft coupler coupling the screw jacks; a power unit driving one of the screw jacks and through the shaft coupler also driving the other screw jack; and a housing covering the screw jacks and other components. The pair of screw jacks each have threaded lifting shafts designed to eliminate risk of unexpected lowering of the jack's lifting tube even if power is lost. A jack system is described including two or more of the jack apparatus controlled by a single control for simultaneous operation.

The present jack apparatus is particularly adapted for heavy duty lifting. The jack apparatus includes a base; a pair of screw jacks; a yoke supported by the screw jacks; a lifting tube supported on the yoke; a shaft coupler coupling the screw jacks; a power unit driving one of the screw jacks and through the shaft coupler also driving the other screw jack; and a housing covering the screw jacks and other components. The pair of screw jacks each have threaded lifting shafts designed to eliminate risk of unexpected lowering of the jack's lifting tube even if power is lost. A jack system is described including two or more of the jack apparatus controlled by a single control for simultaneous operation.

An aircraft lifting assembly includes a jack, a load cell, and a jack adapter. The jack includes an extendable arm having a distal end portion for exerting a force to lift an object. The distal end portion defines a cavity. The jack adapter couples the extendable arm to the load cell and includes a base portion, a cradle portion, and a projection. The base portion defines a jack arm support surface and a load cell support surface. The jack arm support surface opposes the distal end portion of the extendable arm and the load cell support surface opposes the load cell. The cradle portion extends from the base portion to circumscribe a portion of the load cell to secure the jack adapter to the load cell. The projection extends from the base portion into the cavity to secure the jack adapter to the extendable arm of the jack.