Flexible lifting guide mechanism for double-stand-column stacking machine

By using a flexible lifting guide mechanism, elastic elements and an eccentric fixed shaft are used to make the guide wheel adapt to changes in the spacing of the lifting guide rail, which solves the problems of guide wheel jamming and derailment, reduces precision requirements and processing costs, and extends service life.

CN223509573UActive Publication Date: 2025-11-04ROBO TECHAUTOMATION SUZHOU CO LTD
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Patent Information

Application Number
CN202422693662.3
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-11-06
Publication Date
2025-11-04
Estimated Expiration
2034-11-06

AI Technical Summary

Technical Problem

The existing double-column stacker crane's lifting guide wheel mechanism is a rigid structure, which makes it difficult to simultaneously avoid the problems of excessive gap between the guide wheel and the lifting guide rail leading to derailment and insufficient gap leading to jamming. Moreover, as the height of the stacker crane increases, the precision requirements become higher and higher, and the processing cost increases.

Method used

A flexible lifting guide mechanism is adopted, including a first guide wheel module and a symmetrically arranged second guide wheel module. By using elastic elements and an eccentrically set fixed shaft, the guide wheels can move in the Y direction to adapt to changes in the spacing of the lifting guide rails and avoid the risk of jamming and derailment.

Benefits of technology

The accuracy requirements for the parallelism of the lifting guide rails have been reduced, processing costs have been lowered, the service life of the guide wheel module has been extended, and the stability and reliability of the guiding mechanism have been improved.

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Abstract

The utility model relates to the technical field of stacker application, and aims to solve the technical problems that the precision requirement of the parallelism of a lifting guide rail is high, and the processing cost is increased. In order to solve the technical problem, the utility model provides the flexible lifting guide mechanism for the double-stand-column stacking machine. According to the device, a first guide wheel module is connected to the top of a base, the axis of a first guide wheel extends in the X direction and is rotationally connected with the base, and the first guide wheel moves in the Y direction relative to the base; the two second guide wheel modules are connected to the top of the base and arranged on the two sides of the first guide wheel module. The axis of the second guide wheel extends in the Y direction, and the second guide wheel is rotationally connected with the base. Second guide wheels of the two second guide wheel modules are clamped on the two sides of the lifting guide rail, and the second guide wheels are in rolling connection with the lifting guide rail; the first guide wheel is in rolling connection with the inner side face of the lifting guide rail. The precision requirement for the parallelism of the lifting guide rail is lowered, and the machining cost is reduced.
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Description

Technical Field

[0001] This utility model relates to the field of stacker crane application technology, and in particular to a flexible lifting guide mechanism for a double-column stacker crane. Background Technology

[0002] Existing double-column stacker cranes typically employ a rigid lifting guide wheel mechanism. This rigid mechanism requires a high degree of parallelism in the lifting guide rails. Each of the two columns of the stacker crane has a lifting guide rail extending along the Z-direction, and these two rails are parallel to each other. The loading platform is positioned between the two columns, and lifting guide mechanisms are located on both sides of the platform. These mechanisms work in conjunction with the lifting guide rails to provide guidance. The lifting guide mechanism includes a first lifting guide wheel and a second lifting guide wheel. If the gap between the first lifting guide wheel and the lifting guide rail is too large, the second lifting guide wheel risks derailing; conversely, if the gap is too small, the second lifting guide wheel risks jamming with the rail. To simultaneously avoid both risks, the common practice is to increase the precision of the parallelism between the double-column lifting guide rails. However, with the increasing height of stacker cranes (over 30 meters), ensuring this precision becomes increasingly difficult and increases manufacturing costs. Utility Model Content

[0003] Therefore, the technical problem to be solved by this utility model is to overcome the above-mentioned problems existing in the prior art.

[0004] To solve the above-mentioned technical problems, this utility model provides a flexible lifting and guiding mechanism for a double-column stacker crane, comprising:

[0005] The base connects to the loading platform;

[0006] The first guide wheel module is connected to the top of the base. The first guide wheel module includes a first guide wheel. The axis of the first guide wheel extends along the X direction. The first guide wheel is rotatably connected to the base. The first guide wheel moves relative to the base in the Y direction. The X, Y and Z directions form a three-dimensional coordinate system.

[0007] Two second guide wheel modules are connected to the top of the base and symmetrically arranged on both sides of the first guide wheel module; the second guide wheel module includes a second guide wheel, the axis of the second guide wheel extends along the Y direction, and the second guide wheel is rotatably connected to the base;

[0008] The second guide wheels of the two second guide wheel modules are sandwiched on both sides of the lifting guide rail, and the second guide wheels are in rolling connection with the lifting guide rail; the first guide wheel is in rolling connection with the inner side of the lifting guide rail.

[0009] In one embodiment of this utility model, the first guide wheel module further includes a fixed base, a connecting shaft, and an elastic element;

[0010] One end of the fixed base has a groove, and the first guide wheel is disposed in the groove. The first guide wheel is connected to the fixed base through a first fixed shaft. The other end of the fixed base is connected to a connecting shaft.

[0011] The elastic element is sleeved on the connecting shaft. One end of the elastic element is connected to the fixed seat and the other end is connected to the base. The elastic element can extend and retract in the Y direction.

[0012] In one embodiment of this utility model, the elastic element is a disc spring.

[0013] In one embodiment of the present invention, the top of the base is provided with a mounting bracket, which includes two parallel side plates and a back plate connected to one end of the two side plates; the first guide wheel module is installed in the mounting bracket, the two ends of the first fixed shaft are slidably connected to the two side plates respectively, the end of the connecting shaft is connected to the back plate, and the elastic element is connected between the fixed base and the back plate.

[0014] In one embodiment of the present invention, a U-shaped groove is provided at one end of the side plate away from the back plate, and the two ends of the first fixed shaft slide along the Y direction in the U-shaped groove.

[0015] In one embodiment of this utility model, the second guide wheel module further includes a second fixed shaft. The second guide wheel and the second fixed shaft are rotatably connected by a bearing, and the second fixed shaft is connected to the base by a second guide wheel locking nut.

[0016] In one embodiment of this utility model, the second fixed shaft includes a first shaft segment and a second shaft segment, which are eccentrically arranged; a second guide wheel is sleeved on the first shaft segment; and the second shaft segment is connected to the base.

[0017] In one embodiment of the present invention, a hexagonal boss is provided at the end of the second fixed shaft away from the first shaft segment.

[0018] In one embodiment of the present invention, the second guide wheel module further includes an expansion sleeve, which is sleeved on the second fixed shaft and located between the second guide wheel locking nut and the base.

[0019] In one embodiment of this utility model, the base is connected to the loading platform by bolts.

[0020] The above-mentioned technical solution of this utility model has the following advantages compared with the prior art:

[0021] The flexible lifting guide mechanism for the double-column stacker described in this utility model has a first guide wheel that moves in the Y direction relative to the base. This ensures that when the distance between the two lifting guide rails changes, the spacing between the first guide wheels on both sides of the lifting guide rails changes synchronously, thus avoiding the risk of the flexible lifting guide mechanism 1000 jamming or derailing. Therefore, this embodiment can reduce the precision requirements for the parallelism of the lifting guide rails, reduce processing costs, and extend the service life of the first guide wheel module. Attached Figure Description

[0022] To make the content of this utility model easier to understand, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings, wherein:

[0023] Figure 1 This is a structural schematic diagram of a double-column stacker in a preferred embodiment of the present invention;

[0024] Figure 2 This is a structural schematic diagram of a flexible lifting guide mechanism for a double-column stacker crane;

[0025] Figure 3 yes Figure 2 A schematic diagram of the first guide wheel module in the flexible lifting guide mechanism for a double-column stacker crane;

[0026] Figure 4 yes Figure 2 A schematic diagram of the structure of the second guide wheel module in the flexible lifting guide mechanism for a double-column stacker crane;

[0027] Figure 5 yes Figure 4 A sectional view;

[0028] Explanation of reference numerals in the accompanying drawings: 100, base; 110, mounting bracket; 111, side plate; 112, back plate; 113, U-shaped cavity; 114, U-shaped slot;

[0029] 200, First guide wheel module; 210, First guide wheel; 220, Fixed base; 230, Connecting shaft; 240, Elastic element; 250, Groove; 260, First fixed shaft; 270, First guide wheel locking nut;

[0030] 300, Second guide wheel module; 310, Second guide wheel; 320, Second fixed shaft; 321, First shaft section; 322, Second shaft section; 323, Hexagonal boss; 330, Second guide wheel locking nut; 340, Expansion sleeve;

[0031] 400. Cargo loading platform;

[0032] 500. Lifting guide rail. Detailed Implementation

[0033] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, so that those skilled in the art can better understand and implement the present invention. However, the embodiments are not intended to limit the present invention.

[0034] Reference Figures 1-5 As shown, this utility model embodiment provides a flexible lifting guide mechanism for a double-column stacker crane, comprising:

[0035] The base 100 is connected to the loading platform 400;

[0036] The first guide wheel module 200 is connected to the top of the base 100. The first guide wheel module 200 includes a first guide wheel 210, the axis of which extends along the X direction. The first guide wheel 210 is rotatably connected to the base 100 and can move relative to the base 100 in the Y direction. The X, Y, and Z directions form a three-dimensional coordinate system.

[0037] Two second guide wheel modules 300 are connected to the top of the base 100 and symmetrically arranged on both sides of the first guide wheel module 200; the second guide wheel module 300 includes a second guide wheel 310, the axis of the second guide wheel 310 extends along the Y direction, and the second guide wheel 310 is rotatably connected to the base 100.

[0038] Among them, the second guide wheels 310 of the two second guide wheel modules 300 are sandwiched on both sides of the lifting guide rail 500, and the second guide wheels 310 are tactilely connected to the lifting guide rail 500; the first guide wheel 210 is tactilely connected to the inner side of the lifting guide rail 500.

[0039] Flexible lifting guide mechanisms 1000 are symmetrically arranged on both sides of the loading platform 400, with at least one such flexible lifting guide mechanism 1000 on one side of the loading platform 400. For example, one flexible lifting guide mechanism 1000 is arranged at the top and bottom of one side of the loading platform 400, and two flexible lifting guide mechanisms 1000 are symmetrically arranged on the other side of the loading platform 400. Thus, the loading platform 400 moves up and down by means of the rolling connection between the second guide wheels 310 of the four flexible lifting guide mechanisms 1000 and the lifting guide rails 500. The first guide wheels 210 on both sides of the loading platform 400 are respectively in contact with the two lifting guide rails 500. In this embodiment, two second guide wheel modules 300 are sandwiched on both sides of the lifting guide rails 500, and the second guide wheels 310 also bear the bending moment of the loading platform 400 in the Z direction. In this embodiment, the first guide wheel 210 is in contact with the lifting guide rail 500, which serves to guide the lifting of the loading platform 400 and reduce the impact force on the lifting guide rail 500 when the stacker crane accelerates or decelerates in the X direction.

[0040] Specifically, in this embodiment, the first guide wheel 210 moves relative to the base 100 in the Y direction. This ensures that when the distance between the two lifting guide rails 500 changes, the spacing between the first guide wheels 210 on both sides of the lifting guide rail 500 changes synchronously, maintaining constant contact between the first guide wheels 210 and the lifting guide rail 500. This avoids the risk of the flexible lifting guide mechanism 1000 jamming or derailing. Therefore, this embodiment reduces the precision requirements for the parallelism of the lifting guide rails 500, lowers processing costs, and extends the service life of the first guide wheel module 200.

[0041] Furthermore, the first guide wheel module 200 also includes a fixed base 220, a connecting shaft 230, and an elastic element 240; one end of the fixed base 220 is provided with a groove 250, and the first guide wheel 210 is disposed in the groove 250. The first guide wheel 210 is rotatably connected to the fixed base 220 through the first fixed shaft 260; for example, the first guide wheel 210 and the first fixed shaft 260 are rotatably connected through a bearing, and the first fixed shaft 260 is connected to the fixed base 220; the other end of the fixed base 220 is connected to the connecting shaft 230, and the connecting shaft 230 extends in the Y direction; the elastic element 240 is sleeved on the connecting shaft 230, one end of the elastic element 240 is connected to the fixed base 220, and the other end is connected to the base 100. The elastic element 240 extends and retracts in the Y direction.

[0042] Specifically, under the action of the elastic element 240 in this embodiment, the first guide wheels 210 located on both sides of the loading platform 400 are always in contact with the two lifting guide rails 500. When the distance between the two lifting guide rails 500 decreases, the elastic element 240 is compressed, and the distance between the first guide wheels 210 on both sides of the loading platform 400 changes synchronously with the distance between the lifting guide rails 500, thereby avoiding the risk of the flexible lifting guide mechanism 1000 getting stuck or derailing. The structure of this application is simple, stable, and reliable.

[0043] Furthermore, the elastic element 240 is a disc spring. Specifically, the disc spring can absorb part of the impact force on the first guide wheel 210 when the stacker crane accelerates or decelerates in the X direction, thereby extending the service life of the first guide wheel module 200.

[0044] Furthermore, the top of the base 100 is provided with a mounting bracket 110, which includes two parallel side plates 111 and a back plate 112 connected to one end of the two side plates 111; the two side plates 111 and the back plate 112 form a mounting bracket 110 with a U-shaped cavity 113. The first guide wheel module 200 is installed in the U-shaped cavity 113 of the mounting bracket 110. The two ends of the first fixed shaft 260 are slidably connected to the two side plates 111 respectively, and the end of the connecting shaft 230 is connected to the back plate 112 through the first guide wheel locking nut 270. The elastic element 240 is connected between the fixed seat 220 and the back plate 112. Specifically, the mounting bracket 110 in this embodiment allows the first guide wheel module 200 to slide in the mounting bracket 110, making its operation more stable and reliable.

[0045] Furthermore, a U-shaped slot 114 is provided at the end of the side plate 111 away from the back plate 112, and both ends of the first fixed shaft 260 slide along the Y direction in the U-shaped slot 114. Specifically, the U-shaped slot 114 in this embodiment provides guidance for the sliding of the first fixed shaft 260 along the Y direction, resulting in smoother operation.

[0046] Furthermore, the second guide wheel module 300 also includes a second fixed shaft 320. The second guide wheel 310 and the second fixed shaft 320 are rotatably connected via bearings, and the second fixed shaft 320 is connected to the base 100 via a second guide wheel locking nut 330. Specifically, the connection method in this embodiment is stable and reliable, easy to install and disassemble, and has low manufacturing cost.

[0047] Furthermore, the second fixed shaft 320 includes a first shaft segment 321 and a second shaft segment 322, which are eccentrically arranged. A second guide wheel 310 is sleeved on the first shaft segment 321. The base 100 has a mounting hole, and the second shaft segment 322 is installed in the mounting hole. Specifically, in this embodiment, the first shaft segment 321 and the second shaft segment 322 are eccentrically arranged, so that the second guide wheel 310 is eccentrically aligned with the mounting hole, thereby adjusting the loading platform to a horizontal position by rotating the second fixed shaft 320.

[0048] Furthermore, a hexagonal boss 323 is provided at the end of the second fixed shaft 320 away from the first shaft segment 321. Specifically, in this embodiment, the second fixed shaft 320 can be rotated by clamping the hexagonal boss 323 with a tool, which is convenient and quick to operate.

[0049] Furthermore, the second guide wheel module 300 also includes a shrink sleeve 340, which is sleeved on the second shaft section 322 of the second fixed shaft 320 and located between the second guide wheel locking nut 330 and the base 100. Specifically, the design of the shrink sleeve 340 in this embodiment can generate greater friction to prevent the second fixed shaft 320 from rotating during operation.

[0050] Furthermore, the base 100 is connected to the loading platform 400 by bolts.

[0051] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the protection scope of this invention.

Claims

1. A flexible lifting and guiding mechanism for a double-column stacker crane, characterized in that: include: The base connects to the loading platform; A first guide wheel module is connected to the top of the base. The first guide wheel module includes a first guide wheel, the axis of which extends along the X direction. The first guide wheel is rotatably connected to the base and moves relative to the base in the Y direction. The X direction, the Y direction, and the Z direction are a three-dimensional coordinate system. Two second guide wheel modules are connected to the top of the base and symmetrically arranged on both sides of the first guide wheel module; The second guide wheel module includes a second guide wheel, the axis of which extends along the Y direction, and the second guide wheel is rotatably connected to the base; The second guide wheels of the two second guide wheel modules are sandwiched on both sides of the lifting guide rail, and the second guide wheels are in rolling connection with the lifting guide rail; the first guide wheel is in rolling connection with the inner side of the lifting guide rail.

2. The flexible lifting and guiding mechanism for a double-column stacker crane according to claim 1, characterized in that: The first guide wheel module also includes a fixed base, a connecting shaft, and an elastic element; One end of the fixed base has a groove, the first guide wheel is disposed in the groove, and the first guide wheel is connected to the fixed base through a first fixed shaft; the other end of the fixed base is connected to a connecting shaft. The elastic element is sleeved on the connecting shaft. One end of the elastic element is connected to the fixed seat and the other end is connected to the base. The elastic element extends and retracts in the Y direction.

3. The flexible lifting and guiding mechanism for a double-column stacker crane according to claim 2, characterized in that: The elastic element is a disc spring.

4. The flexible lifting and guiding mechanism for a double-column stacker crane according to claim 2, characterized in that: The base is provided with a mounting bracket on its top. The mounting bracket includes two parallel side plates and a back plate connected to one end of the two side plates. The first guide wheel module is installed in the mounting bracket. The two ends of the first fixed shaft are slidably connected to the two side plates respectively. The end of the connecting shaft is connected to the back plate. The elastic element is connected between the fixed base and the back plate.

5. The flexible lifting and guiding mechanism for a double-column stacker crane according to claim 4, characterized in that: A U-shaped slot is provided at one end of the side plate away from the back plate, and both ends of the first fixed shaft slide along the Y direction in the U-shaped slot.

6. The flexible lifting and guiding mechanism for a double-column stacker crane according to claim 1, characterized in that: The second guide wheel module also includes a second fixed shaft. The second guide wheel and the second fixed shaft are rotatably connected by a bearing. The second fixed shaft is connected to the base by a second guide wheel locking nut.

7. The flexible lifting and guiding mechanism for a double-column stacker crane according to claim 6, characterized in that: The second fixed shaft includes a first shaft segment and a second shaft segment, which are eccentrically arranged; the second guide wheel is sleeved on the first shaft segment; and the second shaft segment is connected to the base.

8. The flexible lifting and guiding mechanism for a double-column stacker crane according to claim 7, characterized in that: The second fixed shaft has a hexagonal boss at one end away from the first shaft segment.

9. The flexible lifting and guiding mechanism for a double-column stacker crane according to claim 8, characterized in that: The second guide wheel module also includes an expansion sleeve, which is sleeved on the second fixed shaft and located between the second guide wheel locking nut and the base.

10. The flexible lifting and guiding mechanism for a double-column stacker crane according to claim 1, characterized in that: The base is connected to the cargo platform by bolts.