Lifting device with a three-sided kinematic frame system

Abstract

The invention relates to a lifting device for vertically raising and lowering a movable work surface (13) relative to a stationary work surface (14) with essentially no lateral displacement, by means of a three-sided kinematic frame system. This frame system has three spindles (2, 3, 4) arranged essentially at right angles to each other, each with two spindle nuts (6, 7), which are guided linearly in guide profiles (12) attached to the stationary work surface (14) and are rotaryally coupled to a common drive module (1) via bevel gears (5).Ends of lifting elements (9) arranged in pairs in an X are articulated to the spindle nuts (6, 7) via hinges (8), the opposite ends of which are attached via hinges (11) to hinge fixings (10) of the movable work surface (13), so that by rotating the spindles (2, 3, 4) a substantially vertical lifting movement is generated while maintaining the parallelism of the work surfaces (13, 14).

Description

[0001] The invention relates to a device for raising and lowering a work surface vertically and parallel to a stationary work surface without lateral displacement by means of a three-sided kinematic frame system which is connected to both work surfaces, wherein the space between the two work surfaces is freely available and allows the functional design of the work surfaces from one side. 2. State of the art

[0002] Prior art lifting devices used in the construction and transport industries or for private use are equipped with centrally or bilaterally arranged threads, cables, or hydraulic sheave kinematics (sheave lifting tables). The disadvantages of the devices described above are that the space under the movable work surface is largely occupied by the kinematic lifting system, that the movable work surface is horizontally displaced or tilted during the lifting movement, and that obstacles cannot be bypassed while standing in the working area of ​​the device. 2.1 Technical problem of the invention

[0003] The object of the present invention is to describe a device that overcomes some of the disadvantages of existing lifting devices, offers high applicability and usability for performing service and assembly work in industry, construction, and everyday use, facilitates simple lifting and installation, enables the use of the space between stationary and moving work surfaces, improves the stability of the device under external horizontal forces and vibrations by means of a suitable kinematic system, and allows the device to be manufactured using easily manufactured elements and details for the kinematic system. It also enables the device to navigate around obstacles located in the work area. 2.2 Solution to the problem

[0004] This problem is solved according to the invention by means of a device consisting of a stationary work surface, a work surface movable parallel vertically and without lateral displacement and a three-sided kinematic frame system which is connected to both work surfaces, wherein the area between the work surfaces is freely available and allows the functional design of the work surfaces from one side.

[0005] A three-sided kinematic frame system consisting of three spindles arranged at right angles to each other with opposing thread halves and correspondingly two spindle nuts each placed in guide profiles, the spindles of the frame system being coupled successively at 90° by means of angle gears and the guide profiles being connected to the stationary work surface and three pairs of lifting elements arranged in an “X” orientation to each other, each of which is connected to the movable work surface and the corresponding spindle nut by means of a hinge connection. Explanation of the device:

[0006] The elements of the three-sided kinematic frame system are mounted on the stationary work surface Pos. 14 and on the movable work surface Pos. 13 as described: The spindles Pos. 2, Pos. 3, and Pos. 4 with opposing threaded halves, each with two spindle nuts Pos. 6 and Pos. 7 with hinges Pos. 8, and three guide profiles Pos. 12, wherein the spindles are kinematically coupled sequentially by means of two bevel gears Pos. 5 at an angle of 90 degrees. Three pairs of lifting elements Pos. 9, arranged at an "X" to each other, are connected to the movable work surface by means of hinges Pos. 8 to the corresponding spindle nuts Pos. 6 and Pos. 7, and by means of hinge Pos. 11 to the corresponding hinge attachments Pos. 10.

[0007] During rotary drive movement from the drive module Pos. 1 (manual or machine-driven) to the spindle connected thereto, in this specific case to the spindle Pos. 2, thereby to the spindle Pos. 3 connected thereto, and thereby also to the spindle Pos. 4, which are coupled to each other by means of an angle gear Pos. 5, the spindle nuts Pos. 6 and Pos. 7 perform a linear movement towards or away from each other in the guide profiles Pos. 12 and, by means of a hinge Pos. 8, transfer the movement to the lifting elements arranged “X” to each other, which, by means of a hinge 11, cause a vertical lifting movement to the hinge attachment Pos. 10, thereby also causing vertical movement of the movable work surface Pos. 13 to which the hinge attachments are connected. Explanations for the appendix, Figure 1.

[0008] 1. Drive device 2. Right spindle 3. Center spindle 4. Left spindle 5. Angle gear 6. Left spindle nut 7. Right spindle nut 8. Hinge spindle nuts 6 and 7 9. “X” lifting pair element 10. Hinge attachment on the movable work surface 11. Hinge attachment 12. Guide profile 13. Movable work surface 14. Fixed work surface

Claims

1. The invention relates to a device having a center of gravity that is movable parallel to a stationary base without lateral displacement, consisting of a work surface movable parallel to the base surface, characterized in that the displacement of the movable work surface is effected by means of a three-sided kinematic frame system, which consists of three spindles coupled one after the other at 90° with opposing threaded halves, each with two spindle nuts connected to the base surface by means of guide profiles, and of three pairs of rods arranged in an “X” configuration connected to each other by means of hinge connections to the respective spindle nut and to the movable work surface.