CN217076841U

CN217076841U - Scissor-fork type lifting structure and lifter

Info

Publication number: CN217076841U
Application number: CN202220221565.2U
Authority: CN
Inventors: 冯旭东; 辛小臣; 李军; 田冬冬
Original assignee: Beijing Metallurgical Equipment Research Design Institute Co Ltd
Current assignee: Beijing Metallurgical Equipment Research Design Institute Co Ltd
Priority date: 2022-01-26
Filing date: 2022-01-26
Publication date: 2022-07-29
Anticipated expiration: 2032-01-26

Abstract

The utility model relates to the technical field of elevators, and discloses a scissor type lifting structure, which comprises two groups of lifting fork arms which are respectively rotatably arranged at two ends of a first rotating shaft; the driving mechanism is horizontally fixed on the first rotating shaft, is a hydraulic driving device or a screw rod driving device, and is provided with a driving rod perpendicular to the first rotating shaft at one end; the power seat is arranged on the driving rod; and one end of the power arm is hinged on the power seat, the other end of the power arm is hinged on the lifting fork arm, and the included angle between the power arm and the lifting fork arm is larger than that between the driving rod and the lifting fork arm. The scissor type lifting structure has a short overall dimension after contraction and reduction, and simultaneously has a large load capacity.

Description

Scissor-fork type lifting structure and lifter

Technical Field

The utility model relates to a lift technical field, it is specific, relate to a cut fork elevation structure and lift.

Background

The hydraulic cylinder inclined strut is adopted by most common fork lifts to drive the fork arms, but the hydraulic cylinder inclined strut needs a higher installation space, and when the lift is in the lowest state, the height of the lower guide rail frame to the upper guide rail frame is larger, so that the fork lifts are not convenient to store and transport, and cannot be used in the lower occasions. For example, when a stacker is used and needs to fork and store lower goods, the height of the elevator on the stacker needs to be reduced to a lower height, and the traditional elevator cannot meet the application scenario even in the lowest state. Therefore, an elevator which adopts an electric screw rod to drive the fork arms appears, the electric screw rod directly drives the moving shaft at the lower guide rail, and the distance between the lower ends of the two fork arms is further shortened, so that the elevator is lifted. However, when the elevator is in the lowest state, the included angle between the driving force direction provided by the electric screw rod and the fork arm axis is small, so that the ratio of the driving force required by the elevator to the load when the elevator starts to lift from the lowest position is large, and the elevator can only be applied to the occasions with low loads.

SUMMERY OF THE UTILITY MODEL

The utility model relates to a solve above-mentioned technical problem and make, its purpose provides a cut fork lift structure and lift, can adapt to the goods highly lower and the great application scenario of goods weight.

In order to achieve the above object, in a first aspect, the present invention provides a scissor lift structure, including: the two groups of lifting fork arms are respectively and rotatably arranged at two ends of the first rotating shaft; the driving mechanism is horizontally fixed on the first rotating shaft, is a hydraulic driving device or a screw rod driving device, and is provided with a driving rod perpendicular to the first rotating shaft at one end; the power seat is arranged on the driving rod; and one end of the power arm is hinged on the power seat, the other end of the power arm is hinged on the lifting fork arm, and the included angle between the power arm and the lifting fork arm is larger than that between the driving rod and the lifting fork arm.

Preferably, two crossed power arms are arranged between the power base and the lifting fork arm.

Preferably, the power arms are arranged on two sides of the power seat.

Preferably, the driving mechanism is a hydraulic driving device, the driving rod is a telescopic rod, and the power seat is fixedly arranged on the telescopic rod.

Preferably, the driving mechanism is a screw driving device including: the base is fixedly arranged on the first rotating shaft, the driving motor is arranged on the base, and the driving rod is connected with the output end of the driving motor; the power seat is in threaded connection with the driving rod.

In order to achieve the above object, in a second aspect, the present invention provides an elevator, comprising:

a scissor lift structure as described above; the lower guide rail frame is provided with a guide rail parallel to the driving rod, one side of the lower end of the lifting fork arm is hinged with the lower guide rail frame, and the other side of the lower end of the lifting fork arm is arranged in the guide rail in a sliding manner; the upper guide rail frame is provided with a guide rail parallel to the driving rod, one side of the upper end of the lifting fork arm is hinged with the upper guide rail frame, and the other side of the upper end of the lifting fork arm is arranged in the guide rail in a sliding manner.

Preferably, a tray is further arranged on the upper guide rail bracket.

In order to achieve the above object, according to a third aspect of the present invention, there is provided a further elevator comprising:

the two or more scissor-type lifting structures are characterized in that the lifting fork arms which are adjacent up and down are hinged with each other; the lower guide rail frame is provided with a guide rail parallel to the driving rod, one side of the lower end of the lifting fork arm at the bottom end is hinged with the lower guide rail frame, and the other side of the lower end of the lifting fork arm is arranged in the guide rail in a sliding manner; the upper guide rail frame is provided with a guide rail parallel to the driving rod, one side of the upper end of the lifting fork arm positioned at the top end is hinged with the upper guide rail frame, and the other side of the upper end of the lifting fork arm is arranged in the guide rail in a sliding manner.

According to the above description and practice, it can be seen that scissors fork lift structure, set up horizontally actuating mechanism in the pivot of connecting two sets of lift yoke, when the lift yoke will be minimum state, actuating mechanism is in between two sets of lift yoke, can not extend to the upper and lower end of lift yoke, consequently has shorter overall dimension. In addition, an inclined power arm is arranged between the power base and the lifting fork arm, so that the acting force applied to the lifting fork arm by the power base has a large vertical component force, and a large load can be borne. After the scissor type lifting structure is applied to a lifter, the scissor type lifting structure can be suitable for application occasions with lower cargo height and larger cargo weight.

Drawings

Fig. 1a and 1b are schematic structural diagrams of a scissor lift structure according to an embodiment of the present invention at two viewing angles.

Fig. 2 is a schematic structural view of an elevator according to an embodiment of the present invention.

The reference numbers in the figures are:

1. lifting fork arm 2, driving mechanism 3, power seat

4. Power arm 5, first rotating shaft 6 and second rotating shaft

7. Upper rail support 8, lower rail support 9, rail

21. Base 22, driving motor 23, driving rod

Detailed Description

Exemplary embodiments will now be described more fully with reference to the accompanying drawings. The exemplary embodiments, however, may be embodied in many different forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art. The described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

Furthermore, the drawings are merely schematic illustrations of the present disclosure and are not necessarily drawn to scale. The same reference numerals in the drawings denote the same or similar parts, and thus their repetitive description will be omitted. In the present disclosure, the terms "include", "arrange", "disposed" and "disposed" are used to mean open-ended inclusion, and mean that there may be additional elements/components/etc. in addition to the listed elements/components/etc.; the terms "first," "second," and the like are used merely as labels, and are not limiting as to the number or order of their objects; the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus should not be construed as limiting the present invention.

Unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are intended to be inclusive and mean, for example, that they may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Referring to fig. 1a and 1b, the scissor lift structure in this embodiment includes: the lifting fork arm comprises a lifting fork arm 1, a driving mechanism 2, a power base 3, a power arm 4 and a first rotating shaft 5. The two groups of lifting fork arms 1 are arranged, and the two groups of lifting fork arms 1 are respectively and rotatably arranged at two ends of the first rotating shaft 5. Each group of lifting fork arms 1 comprises two support rods with the middle parts crossed together, and the crossed part of the two support rods is rotatably arranged on the first rotating shaft 5. The driving mechanism 2 is horizontally and fixedly arranged on the first rotating shaft 5, and one end of the driving mechanism is provided with a driving rod vertical to the first rotating shaft 5.

In this embodiment, the drive mechanism 2 is a screw drive device including: a base 21, a drive motor 22 and a drive rod 23. Wherein, the base 21 is fixedly arranged on the first rotating shaft 5 and positioned between the two groups of lifting fork arms 1; the driving motor 22 is installed on the base 21, and the output end of the driving motor is connected with the driving rod 23, so that the driving rod 23 can be driven to rotate around the self axial direction. An external thread is arranged on the driving rod 23 and is used for connecting with the power seat 3.

The power base 3 is sleeved on the driving rod 23, and internal threads are arranged on the power base 3, so that the power base 3 is in threaded connection with the driving rod 23. The power arm 4 is arranged between the power base 3 and the lifting yoke 1, and two ends of the power arm are respectively hinged with the power base 3 and the lifting yoke 1. Specifically, in this embodiment, two crossed power arms 4 are respectively provided between the power base 3 and each set of lifting yoke 1. As shown in fig. 1a and fig. 1b, a second rotating shaft 6 is arranged between the parallel supporting rods in the two groups of lifting fork arms 1, one end of the power arm 4 is hinged on the second rotating shaft 6, and the other end is hinged on the power seat 3.

The power arm 4 in this embodiment prevents the power base 3 from rotating about the drive rod 23. When the driving rod 23 is rotated by the driving motor 22, the driving rod 23 can move in the axial direction because the rotation of the power base 3 is limited. By controlling the rotation direction of the drive lever 23, the power base 3 can be moved forward or backward along the drive lever 23. When the power base 3 is driven to move to one side close to the lifting fork arm 1, the power arm 4 can drive the lifting fork arm 1 to lift; when the power base 3 is driven to move to the side far away from the lifting yoke 1, the power arm 4 can drive the lifting yoke 1 to descend.

Since the driving mechanism 2 in this embodiment is horizontally disposed, the vertical height of the scissor lift structure can be greatly reduced when the scissor lift structure is at the lowest position, compared to a conventional hydraulic strut driving mechanism that is disposed at an inclined position. In addition, two crossed power arms 4 are arranged in the embodiment, the included angle between each power arm 4 and the corresponding lifting fork arm 1 is large, the horizontal acting force applied to the power base 3 by the driving mechanism 2 can be transferred to the lifting fork arms 1 through the power arms 4, and large vertical component force is generated, so that the load capacity of the scissor type lifting structure is improved.

It should be noted that in this embodiment, crossed power arms 4 are provided between the power base 3 and each set of lifting yoke 1, and in other embodiments, only one power arm 4 may be provided between the power base 3 and the lifting yoke 1, which also enables the scissor lift structure to be raised or lowered. At this time, the included angle between the power arm 4 and the lifting yoke 1 is ensured to be larger than the included angle between the driving rod 23 and the lifting yoke 1, so that the load capacity of the scissor type lifting structure is higher than that of a traditional lifter which adopts an electric screw rod to drive the yoke.

In another embodiment, the driving mechanism 2 can be a hydraulic driving device, and accordingly, the driving rod 23 is a telescopic rod, and the front end of the telescopic rod can be extended and retracted. The hydraulic drive is likewise fastened horizontally to the first shaft 5, and the power base 3 is fastened to the telescopic rod. The power seat 3 is driven to move horizontally by the extension and contraction of the telescopic rod, so that the lifting fork arm 1 is lifted or lowered.

In addition, in this embodiment, a lift is also shown, and fig. 2 shows a three-dimensional structure of the lift, and in order to show more detailed structures, a group of lifting yoke arms 1 and a part of the structure of the lower rail bracket are hidden in the drawing.

As shown in fig. 2, the elevator adopts the scissor-type lifting structure, and an upper guide rail frame 7 and a lower guide rail frame 8 are respectively arranged at the upper end and the lower end of the scissor-type lifting structure. The upper guide rail frame 7 and the lower guide rail frame 8 are both in frame type structures. The upper guide rail bracket 7 and the lower guide rail bracket 8 are both provided with guide rails 9 parallel to the driving rod 23. One side of the lower end of the lifting fork arm 1 is hinged on the lower guide rail frame 8, and the other side is arranged in the guide rail 9 in a sliding manner; one side of the upper end of the lifting fork arm 1 is hinged on the upper guide rail frame 7, and the other side is arranged in the guide rail 9 in a sliding manner. A tray is arranged on the upper guide rail frame 7, and goods on the tray can be lifted or descended through the scissor type lifting structure. The lift can be lowered to a lower height to carry lower positioned cargo. Simultaneously, when the lift descends to a lower position, heavier goods can also be lifted.

In another embodiment, more than two scissor lift structures may be connected together in sequence, with the lift forks being hinged to each other. An upper guide rail bracket 7 and a lower guide rail bracket 8 are respectively arranged at the upper end and the lower end, and guide rails 9 parallel to the driving rod 23 are respectively arranged on the upper guide rail bracket 7 and the lower guide rail bracket 8. One side of the lower end of the lifting fork arm 1 at the bottom end is hinged on the lower guide rail frame 8, and the other side is arranged in the guide rail 9 in a sliding manner; one side of the upper end of the lifting yoke 1 at the top end is hinged on the upper guide rail bracket 7, and the other side is arranged in the guide rail 9 in a sliding manner. The elevator with the structure can be lifted to a higher height and has higher load capacity.

It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Claims

1. A scissor lift structure comprising:

the two groups of lifting fork arms are respectively and rotatably arranged at two ends of the first rotating shaft;

the driving mechanism is horizontally fixed on the first rotating shaft, is a hydraulic driving device or a screw rod driving device, and is provided with a driving rod perpendicular to the first rotating shaft at one end;

the power seat is arranged on the driving rod;

and one end of the power arm is hinged on the power seat, the other end of the power arm is hinged on the lifting fork arm, and the included angle between the power arm and the lifting fork arm is larger than that between the driving rod and the lifting fork arm.

2. A scissor lift structure as claimed in claim 1,

two crossed power arms are arranged between the power seat and the lifting fork arm.

3. A scissor lift structure as claimed in claim 2,

the power arms are arranged on two sides of the power seat.

4. A scissor lift structure according to any of claims 1 to 3,

the driving mechanism is a hydraulic driving device, the driving rod is a telescopic rod, and the power seat is fixedly arranged on the telescopic rod.

5. A scissor lift structure according to any of claims 1 to 3,

the actuating mechanism is a lead screw actuating device, including: the base is fixedly arranged on the first rotating shaft, the driving motor is arranged on the base, and the driving rod is connected with the output end of the driving motor;

the power seat is in threaded connection with the driving rod.

6. An elevator, comprising:

a scissor lift structure according to any one of claims 1 to 5;

the lower guide rail frame is provided with a guide rail parallel to the driving rod, one side of the lower end of the lifting fork arm is hinged with the lower guide rail frame, and the other side of the lower end of the lifting fork arm is arranged in the guide rail in a sliding manner;

the upper guide rail frame is provided with a guide rail parallel to the driving rod, one side of the upper end of the lifting fork arm is hinged with the upper guide rail frame, and the other side of the upper end of the lifting fork arm is arranged in the guide rail in a sliding manner.

7. The elevator as claimed in claim 6,

and a tray is also arranged on the upper guide rail frame.

8. An elevator, comprising:

a scissor lift structure as claimed in any one of claims 1 to 5, wherein two or more of the lifting forks are hingedly connected to each other;

the lower guide rail frame is provided with a guide rail parallel to the driving rod, one side of the lower end of the lifting fork arm positioned at the bottom end is hinged with the lower guide rail frame, and the other side of the lower end of the lifting fork arm is arranged in the guide rail in a sliding manner;

the upper guide rail frame is provided with a guide rail parallel to the driving rod, one side of the upper end of the lifting fork arm positioned at the top end is hinged with the upper guide rail frame, and the other side of the upper end of the lifting fork arm is arranged in the guide rail in a sliding manner.