Jacking mechanism

Abstract

The utility model discloses a jacking mechanism which comprises a base plate assembly, a top plate assembly and a jacking assembly. Wherein the base plate assembly serves as a load plate of the jacking mechanism, the top face of the base plate assembly is connected with the top plate assembly, the bottom face of the base plate assembly is connected with the jacking assembly, and the jacking assembly drives the base plate assembly and the top plate assembly to move up and down in the vertical direction. Through the matching effect of the jacking assembly and the top plate assembly, the structure is simple, the occupied space is small, the positioning precision on the horizontal plane is high, and the good unbalance loading resisting capacity is achieved.

Description

Technical Field

[0001] This utility model belongs to the technical field of mechanical lifting mechanisms, specifically relating to a lifting mechanism. Background Technology

[0002] In the automation upgrade of machine tools with exchange worktables, the stacker crane faces space constraints when picking up and placing the exchange worktables. It is necessary to lift the exchange worktables inside the machine tool. However, the internal space of the machine tool that the lifting mechanism can utilize is extremely limited, which can easily lead to the stacker crane forks being unable to pick up the worktables. Utility Model Content

[0003] The purpose of this invention is to provide a lifting mechanism that occupies little space, has high positioning accuracy on the horizontal plane, and has good resistance to eccentric loads.

[0004] To solve the above-mentioned technical problems, the technical solution of this utility model is as follows: a lifting mechanism, including a base plate assembly, a top plate assembly, and a lifting component; wherein, the base plate assembly serves as the load plate of the lifting mechanism, the top surface of the base plate assembly is connected to the top plate assembly, the bottom surface of the base plate assembly is connected to the lifting component, and the lifting component drives the top plate assembly to move up and down vertically on the base plate assembly.

[0005] The substrate assembly includes a substrate body and several limiting posts; wherein, the substrate body serves as a load plate for supporting the installation of the limiting posts; the number of limiting posts is greater than or equal to 3, forming a stable structure, and they are equidistantly arranged on the top surface of the substrate body in the circumferential direction, and the top surface of the limiting posts is connected to the bottom surface of the top plate assembly.

[0006] The limiting post is a guide sleeve.

[0007] The top plate assembly includes a top plate body, several guide posts, and positioning rings. The top plate body serves as a load plate, supporting the guide posts and positioning rings. The guide posts are connected to the bottom surface of the top plate body, and their positions and numbers correspond to the guide tubes. Guide sleeves are nested outside the guide posts to restrict their movement. Through the cooperation of the guide posts and guide sleeves, the base plate assembly and the top plate assembly can be detachably connected. The positioning rings are connected to the top surface of the top plate body to limit the load positioning.

[0008] The lifting assembly includes a drive device and a lifting device; wherein, the lifting device is nested on the upper part of the outer side of the drive device, and the top surface of the lifting device is connected to the bottom surface of the substrate assembly; the drive device is used to drive the lifting device to move up and down in the vertical direction, so as to drive the top plate assembly to move up and down.

[0009] The driving device is a hydraulic cylinder, including a cylinder body, a piston rod, and a flange; wherein, the piston rod is connected to the top surface of the cylinder body, the lifting device is nested on the upper outer side of the piston rod, the piston rod body passes through the center of the flange, and the flange is connected to the bottom surface of the lifting device.

[0010] The lifting device includes a guide sleeve, a top column, an end cover, and a piston pressure plate. The top surface of the top column is connected to the bottom surface of the base plate body, the guide sleeve is sleeved on the outside of the top column, and the bottom surface of the guide sleeve is connected to the flange. The end cover is fixed to the bottom surface of the top column, and the piston rod is movably connected to the bottom surface of the end cover through the piston pressure plate. When the piston rod moves up and down, it drives the top column to move up and down inside the guide sleeve through the end cover. When the top column moves up and down inside the guide sleeve, the top column and the guide sleeve are always coaxial.

[0011] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0012] This utility model, through the cooperation of the lifting component and the top plate component, has a simple structure, small space occupation, high positioning accuracy on the horizontal plane, and good resistance to eccentric load. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of an embodiment of the present utility model;

[0014] Figure 2 This is a front sectional view of an embodiment of the present utility model;

[0015] Figure 3 This is a schematic diagram of the substrate assembly in an embodiment of the present invention;

[0016] Figure 4 This is a schematic diagram of the top plate assembly in an embodiment of the present utility model;

[0017] Figure 5 This is a structural schematic diagram of the top plate assembly from another perspective in an embodiment of this utility model;

[0018] Figure 6 This is a schematic diagram of the lifting assembly in an embodiment of the present invention;

[0019] Figure 7 This is a cross-sectional view of the lifting assembly in an embodiment of this utility model;

[0020] Figure 8 This is a cross-sectional view of an embodiment of the present invention at a certain height;

[0021] Figure 9 This is a cross-sectional view of an embodiment of the present invention at another height;

[0022] In the figure, 10-substrate assembly, 11-substrate body, 12-guide sleeve, 20-top plate assembly, 21-top plate body, 22-guide post, 23-positioning ring, 30-lifting assembly, 31-cylinder, 311-cylinder body, 312-piston rod, 313-flange, 32-lifting device, 321-guide sleeve, 322-top post, 323-end cover, 324-piston pressure plate. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model. Furthermore, the technical features involved in the various embodiments of the present utility model described below can be combined with each other as long as they do not conflict with each other.

[0024] The technical solution of this utility model is: a lifting mechanism, as referenced. Figures 1-9 It includes a base plate assembly 10, a top plate assembly 20, and a lifting assembly 30.

[0025] The substrate assembly 10 includes a substrate body 11 and a guide sleeve 12.

[0026] Preferably, the substrate body 11 is made of high-strength carbon steel plate through precision machining, and has the characteristics of high strength, high dimensional accuracy and good form and position tolerance. The substrate body 11 is the foundation of the whole mechanism, and the other components are directly or indirectly mounted on the substrate body 11. The bottom surface of the substrate body 11 is the mechanism mounting surface, and the lifting mechanism is fixed to other equipment or devices through the mounting holes on the substrate body 11.

[0027] Preferably, the guide sleeve 12 is a standard purchased part, and the inner wall can be lubricated with graphite copper sleeve. The guide sleeve 12 is fixed on the base plate body 11 in a symmetrical and equally spaced layout of 4 sets (4 sets are selected in this embodiment), which can provide anti-overturning torque for the top plate body 21.

[0028] The top plate assembly 20 includes a top plate body 21, guide posts 22, and positioning rings 23.

[0029] Preferably, the top plate body 21 is also made of high-strength carbon steel plate and precision machined, featuring high strength, high dimensional accuracy, and good form and position tolerances. The top surface of the top plate body 21 serves as the load-bearing surface for the entire mechanism.

[0030] Preferably, the guide post 22 is made of stainless steel bar with a relatively large outer diameter, and the straightness and surface roughness of the cylindrical surface are strictly guaranteed.

[0031] Preferably, the positioning ring 23 is installed on the top surface of the top plate body 21 to position the load-bearing pallet in the horizontal plane and restrict its degree of freedom.

[0032] The lifting assembly 30 includes a hydraulic cylinder 31 and a lifting device 32. The hydraulic cylinder 31 includes a cylinder body 311, a piston rod 312, and a flange 313; the lifting device 32 includes a guide sleeve 321, a top column 322, an end cap 323, and a piston pressure plate 324.

[0033] Preferably, the hydraulic cylinder 31 is also a heavy-duty tie rod hydraulic cylinder, which can effectively increase the hydraulic oil pressure when the cylinder diameter is limited, thereby increasing the upper limit of the lifting force of the mechanism.

[0034] Preferably, the inner and outer diameters of the core components of the lifting device 32, the guide sleeve 321 and the top column 322, are precision machined, employing a clearance fit while ensuring the surface roughness of the mating surfaces, and certain lubrication measures are taken to ensure smooth sliding between the two while strictly maintaining coaxiality. Even if the load center of gravity on the top plate body 21 is not located on the axis of the top column 322, it can still provide a large anti-overturning moment to ensure that the parallelism of the top plate body 21 relative to the base plate body 11 is within the designed allowable tolerance.

[0035] The cylinder body 311 is fixed to the bottom end face of the guide sleeve 321 via the flange 313. The end cover 323 is installed on the bottom surface of the top column 322. The piston rod 312 drives the end cover 323 and the top column 322 to move horizontally within the guide sleeve 321. The function of the piston pressure plate 324 is to float and connect the piston rod 312 and the end cover 323.

[0036] The lower part of the lifting assembly 30 passes through the central cutout of the base plate body 11 and is fixed to the base plate body 11 by the flange of the guide sleeve 321. The guide posts 22 evenly distributed around the top plate assembly 20 are coaxially installed with the four guide sleeves 12 of the base plate assembly 10. The top posts 322 support the bottom surface of the top plate body 21 and drive the top plate assembly 20 to realize the lifting action of the mechanism.

[0037] In this embodiment, a lifting mechanism, when the piston rod 312 rises, synchronously drives the piston pressure plate 324, end cap 323, top column 322, and top plate assembly 20 to move upward as a whole. Through the coaxial cooperation of the guide sleeve 321 with the top column 322 and the guide sleeve 12 with the guide column 22 (a total of 4 groups of guide sleeves 12 + 1 group of guide sleeves 321), the freedom of the top plate is restricted, allowing only vertical translational lifting movements. All five groups of guide columns and guide sleeves are respectively installed on the base plate body 11 and the top plate body 21, and the relative positional accuracy is ensured by the machining dimensions of the parts, ultimately achieving accurate positioning on the horizontal plane during the lifting process of the top plate. Simultaneously, due to the clearance fit between the guide columns and guide sleeves, and the layout of the large guide sleeve in the center and four groups of small guide sleeves evenly distributed around it, the guide columns and guide sleeves can provide a large anti-overturning moment when the load center of gravity on the top plate shifts, ensuring that the parallelism of the top plate body 21 relative to the base plate body 11 is within the allowable tolerance.

[0038] Those skilled in the art will readily understand that the above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A lifting mechanism, characterized in that, It includes a base plate assembly, a top plate assembly, and a lifting assembly; wherein, the base plate assembly serves as the load plate of the lifting mechanism, the top surface of the base plate assembly is connected to the top plate assembly, the bottom surface of the base plate assembly is connected to the lifting assembly, and the lifting assembly drives the top plate assembly to move up and down vertically on the base plate assembly. The substrate assembly includes a substrate body and several limiting posts; wherein, the substrate body serves as a load plate for supporting the installation of the limiting posts; the number of limiting posts is greater than or equal to 3, forming a stable structure, and they are equidistantly arranged on the top surface of the substrate body in the circumferential direction, and the top surface of the limiting posts is connected to the bottom surface of the top plate assembly.

2. The lifting mechanism according to claim 1, characterized in that, The limiting post is a guide sleeve.

3. A lifting mechanism according to claim 2, characterized in that, The top plate assembly includes a top plate body, several guide posts, and positioning rings. The top plate body serves as a load plate, supporting the guide posts and positioning rings. The guide posts are connected to the bottom surface of the top plate body, and their positions and numbers correspond to the guide tubes. Guide sleeves are nested outside the guide posts to restrict their movement. Through the cooperation of the guide posts and guide sleeves, the base plate assembly and the top plate assembly can be detachably connected. The positioning rings are connected to the top surface of the top plate body to limit the load positioning.

4. A lifting mechanism according to claim 1, characterized in that, The lifting assembly includes a drive device and a lifting device; wherein, the lifting device is nested on the upper part of the outer side of the drive device, and the top surface of the lifting device is connected to the bottom surface of the substrate assembly; the drive device is used to drive the lifting device to move up and down in the vertical direction, so as to drive the top plate assembly to move up and down.

5. A lifting mechanism according to claim 4, characterized in that, The driving device is a hydraulic cylinder, including a cylinder body, a piston rod, and a flange; wherein, the piston rod is connected to the top surface of the cylinder body, the lifting device is nested on the upper outer side of the piston rod, the piston rod body passes through the center of the flange, and the flange is connected to the bottom surface of the lifting device.

6. A lifting mechanism according to claim 5, characterized in that, The lifting device includes a guide sleeve, a top column, an end cover, and a piston pressure plate. The top surface of the top column is connected to the bottom surface of the base plate body, the guide sleeve is sleeved on the outside of the top column, and the bottom surface of the guide sleeve is connected to the flange. The end cover is fixed to the bottom surface of the top column, and the piston rod is movably connected to the bottom surface of the end cover through the piston pressure plate. When the piston rod moves up and down, it drives the top column to move up and down inside the guide sleeve through the end cover. When the top column moves up and down inside the guide sleeve, the top column and the guide sleeve are always coaxial.

7. A lifting mechanism according to claim 5, characterized in that, The hydraulic cylinder is a heavy-duty tie rod hydraulic cylinder.

8. A lifting mechanism according to claim 1, characterized in that, The number of limit posts is 4.

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