Four-column lead screw elevator with floatable frame

Abstract

The utility model discloses a frame floatable four-column lead screw elevator, which comprises four groups of driving components, the same frame mechanism is arranged on the four groups of driving components, an elevator frame is arranged among the four frame mechanisms, one side of the elevator frame is fixedly connected with two rectangular frames which are arranged in a non-diagonal manner, and the other side of the elevator frame is fixedly connected with the two rectangular frames which are arranged in a non-diagonal manner. Connecting rods are arranged between the other side of the lifting frame and the other two non-diagonal rectangular frames, the lifting frame is hinged to the rectangular frames through connecting rod mechanisms, and spherical thrust bearings for compensating errors are arranged in the four frame mechanisms; according to the utility model, the lifting frame floats in one plane, and the lifting frame floats in the second plane due to the application of the four spherical thrust bearings, so that the influence of the mounting error and the manufacturing error of the lifting machine on the smooth operation of the lifting machine is reduced.

Description

Technical Field

[0001] This utility model relates to the field of conveying equipment technology, and in particular to a four-column screw jack with a floating frame. Background Technology

[0002] A screw jack is a mechanical transmission device that converts rotary motion into linear motion. It is widely used in various industrial fields, such as automation equipment, lifting equipment, conveying equipment, and precision positioning systems.

[0003] Traditional screw jacks typically use two screws, one of which drives the lifting frame on one side. Since the two screws are located on opposite sides to drive the lifting frame, the space between the two screws (assuming the screws are distributed left and right, then the left and right direction) is occupied by the screws and related transmission components (such as motors, couplings, and other devices used to drive the screws to rotate). Therefore, it is difficult for objects to pass through this direction occupied by the screws.

[0004] The load that the screw jack bears for a long time will cause excessive stress on the screw, resulting in bending and tilting deformation. The existing four-column screw jack frame is basically rigidly connected to the column and guide rail, and cannot be adjusted in time according to the changes of the column. Utility Model Content

[0005] To address the aforementioned problems, this invention provides a four-column screw jack with a floating frame.

[0006] To achieve the above objectives, this application provides the following technical solution:

[0007] A four-column screw jack with a floating frame includes four sets of drive components. The same frame mechanism is mounted on the four sets of drive components. A jacking frame is arranged between the four frame mechanisms. One side of the jacking frame is fixedly connected to two non-diagonally arranged rectangular frames, and the other side is connected to two other non-diagonally arranged rectangular frames by a connecting rod. The jacking frame is hinged to the rectangular frames through the connecting rod mechanism. Spherical thrust bearings for compensating for errors are arranged in the four frame mechanisms.

[0008] Further configured as follows: the drive assembly includes a bottom mounting plate, on which a vertically arranged linear guide rail is fixed; a top mounting plate is provided on the upper surface of the linear guide rail; a drive motor is provided on the top mounting plate; the output end of the drive motor is vertically downward and connected to a vertically arranged drive screw; the drive screw is rotatably disposed between the top mounting plate and the bottom mounting plate via a bearing; a screw nut is threadedly connected to the circumferential surface of the drive screw; and the frame mechanism is connected to the screw nut and the linear guide rail.

[0009] Further, the lower surface of the top plate is provided with a frame connecting piece, the screw nut is arranged in the frame mechanism and is provided with a plurality of anti-rotation rods uniformly arranged between the frame connecting piece.

[0010] Further, the anti-rotation rods are vertically arranged on the lower surface of the frame connecting piece, and a plurality of limiting holes are arranged on the screw nut for inserting the anti-rotation rods.

[0011] Further, the spherical thrust bearing is clamped between the frame connecting piece and the screw nut.

[0012] Further, the spherical thrust bearing comprises an upper part of a shaft ring and a lower part of a seat ring in the shape of a circular arc.

[0013] Further, the lower surface of the frame connecting piece is provided with a receiving groove one, the top of the shaft ring is in interference fit with the groove one, and the upper surface of the screw nut is provided with a groove two, and the bottom of the seat ring is in interference fit with the groove two.

[0014] Further, the frame connecting piece or the screw nut is provided with a detection switch, and a controller is further arranged, and the controller is in signal connection with the detection switch and can control the opening and closing of the driving motor.

[0015] Compared with the prior art, the beneficial technical effects of the utility model are:

[0016] The utility model first increases the spherical thrust bearing at the connecting part between the driving screw rod and the frame mechanism, the spherical bearing is the circular arc friction pair, can adjust the angle error generated by the fixed two ends of the long screw rod. Meanwhile, the anti-rotation rod is designed, prevents the relative rotation between the frame connecting piece and the screw nut. The four driving screw rods of the utility model are simultaneously provided with the thrust spherical bearing, and the thrust spherical bearing can compensate the angle error between the four screw rods.

[0017] Furthermore, the utility model adopts the mode that one side is fixed and the other side is hinged with the rectangular frame through the connecting rod, realizes the follow-up floating of the lifting frame, and the whole lifting frame can realize the follow-up floating in the X direction. The floating swing can compensate the environmental error, the installation error and the influence caused by the deformation due to long-time bearing.

[0018] In conclusion, the lifting frame floats in one plane, and the application of the four spherical thrust bearings can make the lifting frame float in the second plane, thereby reducing the influence of the lifting machine installation error and manufacturing error on the smooth operation of the lifting machine. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the specific embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the specific embodiments or the prior art description. Obviously, the drawings described in the following are some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor on the basis of these drawings.

[0020] Figure 1 It is a schematic view of the overall structure of the present application.

[0021] Figure 2 It is a front view of the present application.

[0022] Figure 3 It is a schematic view of the partial structure of the present application. Figure 2

[0023] Figure 4 It is a schematic view of the inside of the frame mechanism.

[0024] Figure 5 It is a schematic view of the installation position of the spherical thrust bearing.

[0025] The drawings show that: 1, the elevator frame; 2, the bottom mounting plate; 3, linear guide; 4, the top mounting plate; 5, drive motor; 6, drive screw; 7, screw nut; 8, top plate; 10, side plate; 11, frame connecting piece; 12, anti-rotation rod; 13, spherical thrust bearing; 14, shaft ring; 15, race; 16, containing slot one; 17, slot two; 18, detection switch; 19, connecting rod. DETAILED DESCRIPTION

[0026] The technical solutions of the present application will be described in detail below with reference to the drawings. Obviously, the described embodiments are some embodiments of the present application, not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0027] In the description of the present application, it should be pointed out that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore it cannot be understood as a limitation on the present application. In addition, the terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0028] ​In the description of the utility model, it is necessary to explain, unless another explicit provision and limitation, term "installation", "link", "connection" should do broad sense understanding, for example, can be fixed connection, also can be detachable connection, or integrally connected, can be mechanical connection, also can be electrical connection, can be direct connection, also can be indirectly connected through intermediate medium, can be two element internal communication. For ordinary skilled person in the art, the specific meaning of the above-mentioned term in the utility model can be understood according to specific circumstances.

[0029] Embodiment

[0030] Refer to Figures 1-5 , the utility model discloses a frame four-column screw lifter that can float, including four groups of drive components, install same frame mechanism on four groups of drive components, set up lifter frame 1 between four frame mechanisms;

[0031] In the embodiment, four groups of drive components are rectangular and are respectively and independently separated, so that the transport member has passability in the X direction and the Y direction;

[0032] Wherein, drive component includes bottom mounting plate 2, bottom mounting plate 2 is installed to ground through expansion screw, vertical linear guide 3 is fixed on bottom mounting plate 2, top mounting plate 4 is arranged on the upper surface of linear guide 3, drive motor 5 is arranged on top mounting plate 4, the output of drive motor 5 is vertically downward and is connected with vertically arranged drive screw 6, and drive screw 6 is rotatably arranged between top mounting plate 4 and bottom mounting plate 2 through bearing, screw nut 7 is threadedly connected on the circumferential surface of drive screw 6, and frame mechanism is connected with screw nut 7 and linear guide 3;

[0033] When lifting and transporting, drive motor 5 drives drive screw 6 to rotate, under the rotation of drive screw 6, screw nut 7 moves up and down, thereby driving frame mechanism to lift;

[0034] In the embodiment, the frame mechanism includes a rectangular shell composed of a top plate 8 and four side plates 10, wherein the top plate 8 is slidably connected with the linear guide 3, and the top plate 8 can move vertically along the linear guide 3.

[0035] The lower surface of the top plate 8 is provided with a frame connecting piece 11 through bolts, the screw nut 7 is arranged in the frame mechanism and has a plurality of evenly arranged anti-rotation rods 12 between the frame connecting piece 11, specifically, the anti-rotation rods 12 are vertically installed on the lower surface of the frame connecting piece 11, a plurality of limiting holes are formed on the screw nut 7 for inserting the anti-rotation rods 12, the anti-rotation rods 12 are inserted into the limiting holes, thereby limiting the rotation of the screw nut 7.

[0036] A spherical thrust bearing 13 is installed between the frame connecting piece 11 and the screw nut 7, and the spherical thrust bearing 13 is in sliding sleeve connection with the driving screw 6;

[0037] Further, the spherical thrust bearing 13 comprises an upper part shaft ring 14 and a lower part seat ring 15 arranged in a circular arc shape, wherein a receiving clamping groove one 16 is formed on the lower surface of the frame connecting piece 11, the top of the shaft ring 14 is in interference fit with the clamping groove one, and the deviation level is J8, and a clamping groove two 17 is formed on the upper surface of the screw nut 7, and the bottom of the seat ring 15 is in interference fit with the clamping groove two 17, and the deviation level is J8;

[0038] In the embodiment, the spherical thrust bearing 13 is a circular arc friction pair, so that the bearing has the ability of automatic alignment, can automatically compensate for a certain degree of shaft inclination, thereby making up for the angle error of the four driving screws 6 due to the bearing inclination;

[0039] A detection switch 18 is arranged on the frame connecting piece 11 or the screw nut 7, and the detection switch 18 is used to detect whether the shaft ring 14 and the seat ring 15 are separated, and the embodiment further comprises a controller, and the controller is in signal connection with the detection switch 18 and can control the opening and closing of the driving motor 5, when the detection switch 18 detects that the gap between the shaft ring 14 and the seat ring 15 is greater than a preset value, the detection switch 18 transmits a signal to the controller, and the controller controls the driving motor 5 to be closed, and the whole equipment is stopped.

[0040] The lifting frame 1 is fixedly connected with two non-diagonally arranged rectangular frames on one side, and a connecting rod 19 is arranged between the other two non-diagonally arranged rectangular frames, and the lifting frame 1 is hingedly arranged on the rectangular frames through the connecting rod 19 mechanism, specifically, one side of the connecting rod 19 is hingedly connected with the lifting frame 1, and the other side is hingedly connected with the rectangular frame.

[0041] The working principle and beneficial effects of the utility model are as follows:

[0042] The utility model four linear guide rails 3 carry screw elevators, four linear guide rails 3 and four driving screws 6 will appear angle deviation due to long time bearing, easily cause over constraint, cannot run smoothly, the utility model first increases spherical thrust bearing 13 between driving screw 6 and frame mechanism, spherical bearing is circular arc friction pair, can adjust the angle error of the fixed two ends of long screw rod. At the same time, the anti-rotation rod 12 is designed to prevent the relative rotation between the frame connecting piece 11 and the screw nut 7. The four driving screws 6 of the utility model are simultaneously provided with thrust spherical bearings, and the thrust spherical bearings can compensate for the angle error between the four screws.

[0043] Furthermore, the elevator frame 1 adopts a mode of fixing one side and hingedly connecting the other side with the rectangular frame through the connecting rod, so that the follow-up floating of the elevator frame 1 is realized, and the whole elevator frame 1 can realize the follow-up floating in the X direction, and the floating swing can compensate the environmental error, the installation error and the influence caused by the deformation due to long-time bearing.

[0044] In summary, the elevator frame 1 floats in one plane, and the application of the four spherical thrust bearings 13 can make the elevator frame 1 float in a second plane, so that the influence of the installation error and the manufacturing error of the elevator on the smooth operation of the elevator is reduced.

[0045] Finally, it should be noted that: the above examples are only used to illustrate the technical solutions of the utility model, and not to limit them; although the utility model has been described in detail with reference to the foregoing examples, those skilled in the art should understand that: they can still modify the technical solutions recorded in the foregoing examples, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the utility model.

Claims

1. A frame-floatable four-column screw-lift characterized by, Including four sets of driving assembly, four sets of the driving assembly is installed with same frame mechanism, setting up between four frame mechanisms is lifting frame (1), one side of the lifting frame (1) is fixedly connected with two non-diagonal setting rectangular frame, the other side is hingedly connected between other two non-diagonal setting rectangular frame, four frame mechanisms are provided with spherical thrust bearing (13) that makes up error.

2. A frame-floating four-column screw-lift according to claim 1, characterized in that, The driving assembly includes a bottom mounting plate (2), a vertical linear guide rail (3) is fixed on the bottom mounting plate (2), a top mounting plate (4) is arranged on the upper surface of the linear guide rail (3), a driving motor (5) is arranged on the top mounting plate (4), the output end of the driving motor (5) is vertically downward and connected with a vertical driving lead screw (6), and the driving lead screw (6) is rotatably arranged between the top mounting plate (4) and the bottom mounting plate (2) through a bearing, and a lead screw nut (7) is threadedly connected with the circumferential surface of the driving lead screw (6), and the frame mechanism is connected with the lead screw nut (7) and the linear guide rail (3).

3. A frame-floating four-column screw-lift according to claim 2, characterized in that, The frame mechanism includes a rectangular housing composed of a top plate (8) and four side plates (10).

4. A frame-floating four-column screw-lift according to claim 3, characterized in that, The top plate (8) is slidably connected with the linear guide rail (3), and the top plate (8) can move vertically along the linear guide rail (3).

5. A frame-floating four-column screw-lift according to claim 4, characterized in that, A frame connecting piece (11) is arranged on the lower surface of the top plate (8), and the lead screw nut (7) is arranged in the frame mechanism and between the frame connecting piece (11), and a plurality of anti-rotation rods (12) are uniformly arranged between the lead screw nut (7) and the frame connecting piece (11).

6. A frame-floating four-column screw-lift according to claim 5, characterized in that, The anti-rotation rods (12) are vertically arranged on the lower surface of the frame connecting piece (11), and a plurality of limiting holes are formed in the lead screw nut (7) for inserting the anti-rotation rods (12).

7. A frame-floating four-column screw-lift according to claim 4, characterized in that, The spherical thrust bearing (13) is clamped between the frame connecting piece (11) and the lead screw nut (7).

8. A frame-floating four-column screw-lift according to claim 7, characterized in that, The spherical thrust bearing (13) includes an upper part of a shaft ring (14) and a lower part of a seat ring (15) arranged in a circular arc shape.

9. A frame-floating four-column screw-lift according to claim 8, characterized in that, An accommodation slot (16) is formed in the lower surface of the frame connecting piece (11), and an interference fit is formed between the top of the shaft ring (14) and the slot (16), and a slot (17) is formed in the upper surface of the lead screw nut (7), and an interference fit is formed between the bottom of the seat ring (15) and the slot (17).

10. A frame-floating four-column screw-lift according to claim 9, characterized in that, A detection switch (18) is arranged on the frame connecting piece (11) or the lead screw nut (7), and a controller is further arranged, and the controller is signal connected with the detection switch (18) and can control the opening and closing of the driving motor (5).

Images