Gravity center adjusting device controlled by PLC (Programmable Logic Controller)

Abstract

The utility model is suitable for the technical field of heavy-load AGV forklifts, and provides a PLC control gravity center adjusting device which comprises a heavy-load AGV forklift body. The PLC is fixed to the top of the heavy-load AGV forklift body through bolts; the gravity center adjusting assembly is arranged on the inner side of the heavy-load AGV forklift body; the gravity center adjusting assembly comprises a fixing frame fixed to the outer side wall of the heavy-load AGV forklift body through bolts. The motor is fixed at the central position of the outer side wall of the fixed frame through a bolt; the ball screw is fixed at the output end of the motor; the balancing weight is fixed on a nut seat on the ball screw through a nut; the inclination state of the heavy-load AGV forklift body when a heavy object is forked is detected through the pressure sensors, the overall gravity center of the heavy-load AGV forklift body and the overall gravity center of the heavy object are adjusted through horizontal transverse movement of the balancing weight, pressure values detected by the four pressure sensors are gradually balanced through adjustment of the gravity center, and it is guaranteed that the heavy-load AGV forklift body moves stably.

Description

Technical Field

[0001] The utility model belongs to the technical field of heavy-load AGV forklifts, and in particular relates to a PLC controlled gravity center adjusting device. Background Art

[0002] AGV refers to a transport vehicle equipped with an automatic guided device that can automatically travel along a specified guide path and has multiple automatic transfer functions. Since the goods that the AGV grabs or carries during transportation are different, the length, width, height, density, and placement of the goods are also different, so the center of gravity of the goods carried on the AGV pallet is dynamically changing. If the center of gravity of the AGV is unstable during operation, it is easy to cause the AGV to swing or even roll over, especially when the AGV is traveling at high speed or turning.

[0003] If the weight on the existing AGV forklift is heavy, the overall center of gravity will move forward. If it moves forward too much, it will tip over.

[0004] Therefore, a PLC-controlled center of gravity adjustment device is proposed. Utility Model Content

[0005] The utility model provides a PLC controlled gravity center adjusting device, aiming to solve the above-mentioned problem.

[0006] The utility model is implemented as follows: a PLC-controlled center-of-gravity adjustment device comprises: a heavy-duty AGV forklift body; a PLC controller fixed to the top of the heavy-duty AGV forklift body by bolts; and a center-of-gravity adjustment component arranged on the inner side of the heavy-duty AGV forklift body; wherein the center-of-gravity adjustment component comprises: a fixing frame fixed to the outer side wall of the heavy-duty AGV forklift body by bolts; a motor fixed to the central position of the outer side wall of the fixing frame by bolts; a ball screw fixed to the output end of the motor; a counterweight fixed to the nut seat on the ball screw by a nut; a recessed hole opened at the top of the heavy-duty AGV forklift body; a pressure sensor fixed to the top of the recessed hole by bolts; a spring arranged at the bottom of the pressure sensor; a lifting column arranged at the bottom of the spring; and a ball embedded in the bottom of the lifting column.

[0007] The PLC controlled center of gravity adjustment device also includes an electric push rod embedded and fixed to the bottom of the counterweight block by bolts; a horizontal plate fixed to the output end of the electric push rod; and a universal wheel fixed to the bottom of the horizontal plate by bolts.

[0008] Preferably, the heavy-load AGV forklift body and the fixing frame are both slidably connected to the counterweight block.

[0009] Preferably, there are four concave holes in total, and the four concave holes are symmetrically opened at the bottom of the heavy-load AGV forklift body.

[0010] Preferably, a groove for rolling of the ball is formed at the bottom of the lifting column.

[0011] Preferably, there are two electric push rods in total, and the two electric push rods are symmetrically embedded in the bottom of the counterweight block.

[0012] Preferably, the motor, pressure sensor and electric push rod are all electrically connected to the PLC controller.

[0013] Compared with the prior art, the embodiments of the present application have the following beneficial effects:

[0014] The pressure sensor is used to detect the tilt state of the heavy-loaded AGV forklift body when forking heavy objects, and the overall center of gravity of the heavy-loaded AGV forklift body and the heavy objects is adjusted through the horizontal lateral movement of the counterweight block. Through the adjustment of the center of gravity, the pressure values ​​detected by the four pressure sensors are gradually balanced to ensure the smooth movement of the heavy-loaded AGV forklift body and avoid the problem of tilting or even tipping over of the heavy-loaded AGV forklift body during movement. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of the utility model;

[0016] Figure 2 This is a schematic diagram of the main structure of the heavy-duty AGV forklift of the utility model;

[0017] Figure 3 It is a schematic diagram of the structure of the counterweight block of the utility model;

[0018] Figure 4 This utility model Figure 2 Enlarged view of point A in .

[0019] In the figure: 1. Heavy-load AGV forklift body; 2. PLC controller; 3. Center of gravity adjustment component; 31. Fixed frame; 32. Motor; 33. Ball screw; 34. Counterweight; 35. Concave hole; 36. Pressure sensor; 37. Spring; 38. Lifting column; 39. Ball; 4. Electric push rod; 5. Cross plate; 6. Universal wheel. DETAILED DESCRIPTION

[0020] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by technicians in the technical field of this application; the terms used in the specification of the application herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned drawings are intended to cover non-exclusive inclusions. The terms "first", "second", etc. in the specification and claims of this application or the above-mentioned drawings are used to distinguish different objects, not to describe a specific order.

[0021] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0022] The utility model embodiment provides a PLC controlled center of gravity adjustment device, such as Figure 1-4 As shown, it includes a heavy-duty AGV forklift body 1, the top of the heavy-duty AGV forklift body 1 is fixedly connected to a PLC controller 2 by bolts, and a fixing frame 31 in a gravity center adjustment component 3 is fixedly connected to an outer wall of one side of the heavy-duty AGV forklift body 1 by bolts, a motor 32 is fixedly connected to an outer wall of the fixing frame 31 away from the heavy-duty AGV forklift body 1 by bolts, a ball screw 33 is fixedly connected to the output end of the motor 32, a nut seat on the ball screw 33 is fixedly connected to a counterweight 34 by a nut, and a concave hole 35 is opened at the bottom of the heavy-duty AGV forklift body 1, and a total of four concave holes 35 are provided, and the four concave holes 35 are symmetrically opened at the bottom of the heavy-duty AGV forklift body 1, and the inner of the concave hole 35 A pressure sensor 36 is fixed to the top of the part by bolts, a spring 37 is fixed to the bottom of the pressure sensor 36 by adhesive, a lifting column 38 is fixed to the bottom of the spring 37 by adhesive, a ball 39 is in rolling contact with the bottom of the lifting column 38, and a groove for the ball 39 to roll is provided at the bottom of the lifting column 38. An electric push rod 4 is embedded and fixed to the bottom of the counterweight block 34 by bolts. There are two electric push rods 4, and the two electric push rods 4 are symmetrically embedded in the bottom of the counterweight block 34. A cross plate 5 is fixed to the output end of the electric push rod 4, and a universal wheel 6 is fixed to the bottom of the cross plate 5 by bolts. The motor 32, the pressure sensor 36 and the electric push rod 4 are all electrically connected to the PLC controller 2.

[0023] It should be noted that, since the weight on the existing AGV forklift is heavy, the overall center of gravity will move forward. If it moves forward too much, it will tip over. This embodiment detects the tilt state of the heavy-loaded AGV forklift body 1 when forking heavy objects through the pressure sensor 36, and adjusts the overall center of gravity of the heavy-loaded AGV forklift body 1 and the heavy objects through the horizontal lateral movement of the counterweight block 34. Through the adjustment of the center of gravity, the pressure values ​​detected by the four pressure sensors 36 are gradually balanced, ensuring the smooth movement of the heavy-loaded AGV forklift body 1 and avoiding the problem of the heavy-loaded AGV forklift body 1 tilting or even tipping during the movement.

[0024] Specifically, in this embodiment, the scheme mainly includes a PLC controller 2 and a center of gravity adjustment component 3. When in use, when the heavy-duty AGV forklift body 1 forks a heavy object, due to the gravity of the heavy object, the heavy-duty AGV forklift body 1 tilts forward, and the lifting column 38 moves toward the inside of the concave hole 35 after being compressed. The spring 37 between the pressure sensor 36 and the lifting column 38 is compressed, and the rebound force of the spring 37 after deformation is transmitted to the pressure sensor 36. The pressure sensor 36 detects the pressure information. The pressure information of the four end corners at the bottom of the heavy-duty AGV forklift body 1 is detected by four pressure sensors 36. When the pressure is unbalanced, the PL The C controller 2 controls the operation of the motor 32, and the motor 32 drives the ball screw 33 to rotate through its output end. The counterweight block 34 on the ball screw 33 moves in the horizontal direction. After the counterweight block 34 moves backward, the center of gravity of the heavy-loaded AGV forklift body 1 is adjusted. Through the adjustment of the center of gravity, the pressure values ​​detected by the four pressure sensors 36 are gradually balanced, thereby ensuring the smooth movement of the heavy-loaded AGV forklift body 1 and avoiding the heavy-loaded AGV forklift body 1 from tilting during the movement. The universal wheel 6 that can be raised and lowered at the bottom of the counterweight block 34 can be made to touch the ground without adjusting the center of gravity, thereby reducing the load of the heavy-loaded AGV forklift body 1.

[0025] In a further preferred embodiment of the present invention, Figure 1-3 As shown, the heavy-load AGV forklift body 1 and the fixing frame 31 are both slidably connected to the counterweight block 34 .

[0026] In this embodiment, the stability of the lateral movement of the counterweight block 34 can be ensured by the sliding arrangement, thereby enabling the counterweight block 34 to move forward and backward stably.

[0027] It should be noted that, for the above-mentioned embodiments, for the sake of simplicity, they are all described as a series of action combinations, but those skilled in the art should know that the utility model is not limited by the described action sequence, because according to the utility model, some steps may be performed in other sequences or simultaneously. Secondly, those skilled in the art should also know that the embodiments described in the specification are all preferred embodiments, and the actions and modules involved are not necessarily required by the utility model.

[0028] In the several embodiments provided in the present application, it should be understood that the disclosed devices can be implemented in other ways. For example, the device embodiments described above are merely schematic, such as the division of the above-mentioned units. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or communication connection shown or discussed can be through some interfaces, and the indirect coupling or communication connection between devices or units can be in the form of telecommunication or other forms.

[0029] The units described above as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0030] The above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit the protection scope of the utility model. Obviously, the described embodiments are only some embodiments of the utility model, rather than all embodiments. Based on these embodiments, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model. Although the utility model has been described in detail with reference to the above embodiments, ordinary technicians in this field can still combine, add, delete or make other adjustments to the features in the various embodiments of the utility model according to the circumstances without conflict, without making creative work, so as to obtain different other technical solutions that do not deviate from the concept of the utility model in essence, and these technical solutions also belong to the scope of protection of the utility model.

Claims

1. PLC controlled center of gravity adjustment device, characterized in that: include: Heavy-duty AGV forklift body (1); A PLC controller (2) fixed to the top of the heavy-duty AGV forklift body (1) by bolts; and A center of gravity adjustment component (3) arranged inside the heavy-duty AGV forklift body (1); Wherein, the center of gravity adjustment component (3) comprises: A fixing frame (31) fixed to the outer side wall of the heavy-duty AGV forklift body (1) by means of bolts; A motor (32) fixed to the center of the outer wall of the fixing frame (31) by means of bolts; A ball screw (33) fixed to the output end of the motor (32); A counterweight block (34) fixed to a nut seat on the ball screw (33) via a nut; A recessed hole (35) is formed on the top of the heavy-duty AGV forklift body (1); A pressure sensor (36) fixed to the top of the recessed hole (35) by means of bolts; a spring (37) disposed at the bottom of the pressure sensor (36); A lifting column (38) disposed at the bottom of the spring (37); A ball (39) is embedded in the bottom of the lifting column (38).

2. The PLC controlled center of gravity adjustment device according to claim 1, characterized in that: It also includes an electric push rod (4) embedded and fixed to the bottom of the counterweight block (34) by bolts; A horizontal plate (5) fixed to the output end of the electric push rod (4); A universal wheel (6) is fixed to the bottom of the transverse plate (5) by bolts.

3. The PLC controlled center of gravity adjustment device according to claim 1, characterized in that: The heavy-load AGV forklift body (1) and the fixing frame (31) are both slidably connected to the counterweight block (34).

4. The PLC controlled center of gravity adjustment device according to claim 1, characterized in that: There are four recessed holes (35) in total, and the four recessed holes (35) are symmetrically opened at the bottom of the heavy-load AGV forklift body (1).

5. The PLC controlled center of gravity adjustment device according to claim 1, characterized in that: The bottom of the lifting column (38) is provided with a groove for the rolling of the ball (39).

6. The PLC controlled center of gravity adjustment device according to claim 2, characterized in that: There are two electric push rods (4) in total, and the two electric push rods (4) are symmetrically embedded in the bottom of the counterweight block (34).

7. The PLC controlled center of gravity adjustment device according to claim 1, characterized in that: The motor (32), the pressure sensor (36) and the electric push rod (4) are all electrically connected to the PLC controller (2).

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