WO2016053210A1

WO2016053210A1 - A vertically lifting device

Info

Publication number: WO2016053210A1
Application number: PCT/TH2015/000064
Authority: WO
Inventors: Tanakorn SRISUKSAWAT
Original assignee: Srisawat Engineering Co., Ltd.; I Colour Co., Ltd.
Priority date: 2014-10-03
Filing date: 2015-10-02
Publication date: 2016-04-07

Abstract

A vertically lifting device (100), comprising two arms having balancing point at the center of the vertically lifting device (100) that is at one end of each arm. Another end of each arm is attached to a plate for supporting an object, in particular to the wide object. Only one electric motor is being used and installed at the center of the vertically lifting device in order to make each arms movably together precisely.

Description

TITLE OF THE INVENTION

A VERTICALLY LIFTING DEVICE

TECHNICAL FIELD

The present invention relates to the field of mechanical engineering. BACKGROUND ART

A conventional lifting device or apparatus for lifting small articles mostly is an X-lift device operating by electric motor. The X-lift device (as shown in Fig. 1) comprises two lifting arms having pivot point at a center of each arm so that each arms can be extended or retracted. When the arms are extended, push a plate for supporting the object in a lower position, and when the arms are retracted, push the plate in an elevated position.

In this regard, when an electric motor and a gear drive or the electric motor with sling is installed to the X-lift device, it is possible to control the X-lift device extended or retracted as mentioned above. When the object such as a mirror or a plate for attaching to the objects is placed on the X-lift device, they can be moved as the same direction of the movement of the arms of the X-lift device.

However, there are some limitation and disadvantage regarding the size of the structure, durability and efficiency in using such device. In particular, when comparing the size of the X-lift device with a width of objects that can be raised, in case of it is required to lift the object wider than the width of the x-lifting device, it is required more than one X- lift device (as shown in Fig. 2). When two X-lift devices are in use, it causes imbalance to the device due to each X-lift device has its own electric motor for driving the arms, therefore, it might not work simultaneously cause a disruption during motion. The X-lift structure device is operated by electric motor. The electric motor is installed on one end of one arm. Another end of another arm is mounted to the main structure. Therefore, it causes instability of the X- lift structure device. Although using larger size of X-lift structure device to lift the objects having wider size, it is made more precarious because the structure is anchored to just a single point and not at the center of the structure. In addition, the system consists of numerous parts, making the accuracy of such structures is reduced and required maintenance when used over a long period of time. SUMMARY OF THE INVENTION

The present invention relates to a vertically lifting device for lifting the articles, comprising two arms having pivot point at the center of the vertically lifting device that is at one end of each arm. Another end of each arm is attached to a plate for supporting an object, in particular to the wide object. Only one electric motor is being used and installed at the center of the vertically lifting device in order to make each arms movably together precisely.

BRIEF DESCRIPTION OF THE DRAWINGS

The invention will now be described in more detail with reference to the appended drawings, wherein:

Fig. 1 shows a prior art of a lifting device for lifting an object having similar width to the lifting device;

Fig. 2 shows a prior art of the lifting device comprising two set of the lifting device for lifting the object wider than the lifting device;

Fig. 3 shows a vertically lifting device according to the present invention;

Fig. 4 shows a front view of the vertically lifting device;

Fig. 5 shows an installation of a screw bar, a sliding supporting plate, a lifting arm set and lower rails of the vertically lifting device.

Fig. 6 shows an installation of upper rails attached to a plate for supporting the object and connected to the lifting arms of the vertically lifting device.

Fig. 7 shows a mechanism of the vertically lifting device pushing the plate in lower position.

Fig. 8 shows a mechanism of the vertically lifting device lifting the plate in elevated position.

DETAILED DESCRIPTION OF THE INVENTION

As required, detailed embodiments of the present invention are disclosed herein; however, it is to be understood that the disclosed embodiments are merely exemplary of the invention, which may be embodied in various forms. Therefore, specific structural and functional details disclosed herein are not to be interpreted as limiting but merely as a basis for claims. It should be understood that the drawings and detailed description thereto are not intended to limit the invention to the particular form disclosed, but on the contrary, the invention is to cover all modification, equivalents and alternatives falling within the scope of the present invention as defined by the appended claims. As used throughout this application, the word "may" is used in a permissive sense (i.e., meaning having the potential to), rather than the mandatory sense (i.e., meaning must). Similarly, the words "include," "including," and "includes" mean including, but not limited to. Further, the words "a" or "an" mean "at least one" and the word "plurality" means one or more, unless otherwise mentioned. Where the abbreviations of technical terms are used, these indicate the commonly accepted meanings as known in the technical field. For ease of reference, common reference numerals will be used throughout the figures when referring to the same or similar features common to the figures. The present invention will now be described with reference to Figs. 1-8. A vertically lifting device (100) comprises a main frame (102), lower rails (15), upper rails (6), a lifting arm set (104), a screw set (106) and electric motor (9).

As shown in Figs. 3 and 4, the main frame (102) comprising a base (1) and a supporting rail (2) for supporting an object attached at two ends of the base (1), center frame

(4) attached at a center of the base (1), wherein the center frame (4) comprising two side rods (4a) and two center rods (4b) wherein each end of the side rods (4a) and the center rod

(4b) attached to the base (1) and another end is attached with upper rod (4c);

As shown in Fig. 5, two lower rails (15), wherein one end attached to the side rod (4a) and another end attached to the center rod (4b); in which the lower rails (15) are for supporting the arms (5) in order for the arms (5) is movable along the lower rails (15);

As shown in Fig. 3 and 6, two upper rails (6) attached to a plate (7) for supporting the object, wherein the upper rails (6) are for supporting the arms (5) in order for the arms

(5) is movable along the upper rails (6).

The lower rails (15) and the upper rails (6) are for specifying the movable range of the arms (5) to be in the predetermined range. The pivot point of the arms (5) on the lower rails (15) will cause commuting distance of movement between upper end of the arms (5) and the lower end of the arms (5).

As shown in Figs. 3, 4, 5, and 6, the lifting arm set (104) comprises two arms (5) wherein one end of each arms (5) attached to a sliding supporting plate (14) and another end of each arms (5) attached to the upper rails (6) by sliding knot (8) in order for the arms (5) is movable along the upper rails (6); the center of the arms (5) is attached to the lower rails (15) by sliding knot (16) in order for the arms (5) is movable along the lower rails (15). 15 000064

4

An electric motor (9) is attached to the center rod (4b), wherein the electric motor (9) having a motor shaft for coupling with a screw bar (12) and vibration absorber (10) is provided between motor shaft and the screw bar (12).

As shown in Fig. 5, the screw set (106) comprises the screw bar (12) wherein one end coupled with the motor shaft and another end attached to the upper rod (4c) and covered by bearing (11); two supporting rods (13) in which one end attached to the upper rod (4c) and another end attached to a motor cover plate (21), the two supporting rods (13) has parallel alignment with the screw bar (12) and wherein the sliding supporting plate (14) is coupled with the screw bar (12) and supporting rods (13);

In use, when an electric power is supplied to the electric motor (9), the motor shaft will be rotated resulting in rotating the screw bar (12), the sliding supporting plate (14) is moved up or down according the rotation direction of the electric motor (9). As shown in Fig. 7, when the screw bar (12) is rotated, the sliding supporting plate (14) is elevated along the screw bar (12). The arms (5) which is attached to the sliding supporting plate (14) is also elevated. The arms (5) is rotated around the sliding knot (16) caused the upper end of the arms (5) which is attached to the upper rails (6) is movable downward bringing the object in the lower position. When supplying electric power to the electric motor (9) in opposite direction, as shown in Fig. 8, the screw bar (12) is rotated in opposite direction. The sliding supporting plate (14) is movable downwardly and the lower end of the arms (5) is moved in the lower position. The arms (5) is rotated around the sliding knot (16) and the upper end of the arms (5) is elevated bringing the object is the upper position.

The upper rails (6) will serve to balance both sides of the plane of lifting when the arms (5) move cause the object being lifted or pulled down simultaneously on both sides. The supporting rail (2) is for supporting the object to smoothly movably.

As described above, in considering of the structure of the vertically lifting device

(100) according to the present invention, when the arms (5) is in a higher position to lift the object upward, it can be seen that the position of both arms (5) is angled in such a V - Shaped, in which one each of the arms (5) is attached to the sliding supporting plate (14) and another end of each arms (5) is attached to the plate for supporting the object.

Claims

1. A vertically lifting device (100), comprising:

- a main frame (102) comprising a base (1) and a supporting rail (2) for supporting an object attached at two ends of the base (1), center frame (4) attached at a center of the base (1), wherein the center frame (4) comprising two side rods (4a) and two center rods (4b) wherein each end of the side rods (4a) and the center rod (4b) attached to the base (1) and another end is attached with upper rod (4c);

- two lower rails (15), wherein one end attached to the side rod (4a) and another end attached to the center rod (4b);

- two upper rails (6) attached to a plate (7) for supporting the object;

- a lifting arm set (104) comprising two arms (5) wherein one end of each arms (5) attached to a sliding supporting plate (14) and another end of each arms (5) attached to the upper rails (6) by sliding knot (8) in order for the arms (5) is movable along the upper rails (6); the center of the arms (5) is attached to the lower rails (15) by sliding knot (16) in order for the arms (5) is movable along the lower rails (15);

- an electric motor (9) attached to the center rod (4b), wherein the electric motor (9) having a motor shaft for coupling with a screw bar (12) and vibration absorber (10) is provided between motor shaft and the screw bar (12)

- a screw set (106) comprising the screw bar (12) wherein one end coupled with the motor shaft and another end attached to the upper rod (4c) and covered by bearing (11); two supporting rods (13) in which one end attached to the upper rod (4c) and another end attached to a motor cover plate (21), the two supporting rods (13) has parallel alignment with the screw bar (12) and wherein the sliding supporting plate (14) is coupled with the screw bar (12) and supporting rods (13); wherein when the motor shaft is rotated resulting in rotating the screw bar (12), the sliding supporting plate (14) is moved up or down according the rotation direction of the electric motor (9).

2. A vertically lifting device (100) according to claim 1, wherein the electric motor (9) is servo motor or stepping motor.

3. A vertically lifting device (100) according to claim 1, wherein the screw bar (12) and the sliding supporting plate (14) is feed screw or ball screw.