Automatic leveling device for forklift gantry
By designing an automatic leveling device in the forklift, using hydraulic cylinders and pressure sensors and PLC controllers, the automatic leveling of the forklift door frame is achieved, solving the stability and reliability problems caused by drivers' lack of operating experience, and improving the overall performance of the forklift.
Patent Information
- Application Number
- CN202420974734.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-08
- Publication Date
- 2025-03-18
- Estimated Expiration
- 2034-05-08
AI Technical Summary
The existing forklift gantry leveling method depends on the driver's operating experience. Inexperienced or careless drivers find it difficult to accurately level the forklift, resulting in a decrease in stability and reliability of the forklift.
An automatic leveling device for the forklift gantry is designed, using hydraulic cylinder and pressure sensor combined with PLC controller to automatically detect the tilt state of the gantry and realize automatic leveling through the hydraulic control system.
It improves the accuracy and consistency of forklift gantry leveling, reduces the dependence on driver's operating experience, and enhances the stability and reliability of forklifts.
Smart Images
Figure CN222630971U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of forklift technology, and in particular to an automatic leveling device for forklift masts. Background Technology
[0002] Forklifts, as industrial handling vehicles, are used for loading, unloading, stacking, and short-distance transport of palletized goods. Battery-powered electric forklifts, due to their lack of pollution and low noise, are widely used in indoor operations and other environmentally demanding conditions. Existing forklifts typically use a mast with a vertical position as the center, controlled by hydraulic cylinders to tilt the mast forward or backward. When lifting goods, the mast's tilt angle needs to be adjusted for operational needs and forklift stability. After lifting, the mast needs to be leveled back to a vertical position. This leveling often relies on the driver's experience; for less experienced or careless drivers, failure to accurately level the mast can reduce the forklift's stability and reliability. Utility Model Content
[0003] To address the aforementioned issue of leveling the mast to a vertical position, which often relies on the operator's experience, for less experienced or careless drivers, failure to accurately level the mast can reduce the stability and reliability of the forklift. This application provides an automatic mast leveling device for forklifts.
[0004] The automatic leveling device for forklift masts provided in this application adopts the following technical solution:
[0005] An automatic leveling device for a forklift mast includes a forklift body, a forklift mast body, a U-shaped block, and a fixing rod. The forklift mast body is located on one side of the forklift body. A support mechanism for supporting the forklift mast body is provided at one end of the bottom of the forklift body. Two hydraulic cylinders for tilting the forklift mast body are movably installed at the top of one side of the forklift body. The U-shaped block is installed on one side of the forklift mast body through a first mounting member. The fixing rod is installed at one corner of the top of the forklift body through a second mounting member.
[0006] A first pressure sensor and a second pressure sensor are respectively installed at one end of the top and one end of the bottom of the fixing rod. Both the first pressure sensor and the second pressure sensor are located inside the C-shaped block. A mounting plate is welded to the inner top of the forklift body. A PLC controller is installed on one side of the mounting plate. The first pressure sensor and the second pressure sensor are electrically connected to the input terminal of the PLC controller through two wires.
[0007] Preferably, the support mechanism consists of two first connecting blocks, two second connecting blocks, and a threaded rod. The two first connecting blocks are welded to the bottom of the forklift body, and the two second connecting blocks are respectively welded to two corners on one side of the forklift mast. The opposite sides of the two second connecting blocks are respectively attached to the opposite sides of the two first connecting blocks. The threaded rod movably passes through the two first connecting blocks and the two second connecting blocks, and a nut is threaded onto one end of the threaded rod.
[0008] Preferably, the first mounting component consists of a first mounting block, a connecting rod, and first bolts. The first mounting block is located on one side of the forklift mast body. One end of the connecting rod is welded to one side of the first mounting block, and the U-shaped block is welded to the other end of the connecting rod. There are four first bolts, each threaded through one of the four corners of the first mounting block. All four first bolts are threadedly connected to the forklift mast body.
[0009] Preferably, the second mounting component consists of a second mounting block and a second bolt. The second mounting block is located at one corner of the top of the forklift body. There are four second bolts, each threaded through one of the four corners of the top of the second mounting block, and each of the four second bolts is threadedly connected to one corner of the top of the forklift body.
[0010] Preferably, a corrugated flexible hose is provided between the forklift body and the forklift mast body. One end of the corrugated flexible hose is bonded to one side of the fixing rod, and the other end of the corrugated flexible hose is bonded to one side of the PLC controller. Both of the wires pass through the corrugated flexible hose.
[0011] Preferably, one end of each of the two hydraulic cylinders is movably hinged to the top of one side of the forklift body via two of the hinges, and the ends of the hydraulic rods of the two hydraulic cylinders are movably hinged to the middle of one side of the forklift mast via the other two hinges.
[0012] In summary, this application includes the following beneficial technical effects: During the tilting process of the U-shaped block along with the forklift mast, the inner top wall or inner bottom wall of the U-shaped block will touch the first pressure sensor or the second pressure sensor and be pressurized. The pressurized first pressure sensor or the second pressure sensor will feed back the data value to the PLC controller. At this time, the PLC controller will analyze the data value and send a control command to the hydraulic control system, thereby controlling the two hydraulic cylinders to drive the two forklift masts to tilt. If the data value fed back by the first pressure sensor and the second pressure sensor to the PLC controller is zero during this process, it means that the forklift mast has been leveled. Then the PLC controller will send a control command to the hydraulic control system, thereby controlling the two hydraulic cylinders to stop working. Attached Figure Description
[0013] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the application.
[0014] Figure 2 This is a side view structural diagram of an embodiment of the application.
[0015] Figure 3 This is a partial structural diagram of the application embodiment.
[0016] Figure 4 This is an example of the application. Figure 1 A magnified structural diagram of point A in the middle.
[0017] Explanation of reference numerals in the attached drawings: 1. Forklift body; 2. Forklift mast; 3. Support mechanism; 31. First connecting block; 32. Second connecting block; 33. Threaded rod; 34. Nut; 4. Hydraulic cylinder; 51. U-shaped block; 52. Fixing rod; 53. First pressure sensor; 54. Second pressure sensor; 55. Mounting plate; 56. PLC controller; 57. Corrugated hose; 6. First mounting component; 61. First mounting block; 62. Connecting rod; 63. First bolt; 7. Second mounting component; 71. Second mounting block; 72. Second bolt. Detailed Implementation
[0018] The following is in conjunction with the appendix Figure 1-4 This application will be described in further detail.
[0019] This application discloses an automatic leveling device for a forklift mast, referring to... Figure 1-4The system includes a forklift body 1, a forklift mast body 2, a U-shaped block 51, and a fixing rod 52. The forklift mast body 2 is located on one side of the forklift body 1. A support mechanism 3 for supporting the forklift mast body 2 is provided at one end of the bottom of the forklift body 1. The support mechanism 3 consists of two first connecting blocks 31, two second connecting blocks 32, and a threaded rod 33. The two first connecting blocks 31 are welded to the bottom of the forklift body 1. The two second connecting blocks 32 are respectively welded to two corners on one side of the forklift mast body 2. The opposite sides of the two second connecting blocks 32 are respectively attached to the opposite sides of the two first connecting blocks 31 to prevent the two second connecting blocks 32 from moving left and right. The threaded rod 33 moves through the two first connecting blocks 31 and the two second connecting blocks 52. Block 32 serves as a movable connection between the two first connecting blocks 31 and the two second connecting blocks 32. A nut 34 is threaded onto one end of the threaded rod 33 to prevent it from disengaging from the two first connecting blocks 31 and the two second connecting blocks 32. Then, with the cooperation of the two first connecting blocks 31, the two second connecting blocks 32, and the threaded rod 33, it provides support for the forklift mast body 2. Two hydraulic cylinders 4 for tilting the forklift mast body 2 are movably mounted on the top of one side of the forklift body 1. One end of each hydraulic cylinder 4 is hinged to the top of one side of the forklift body 1 via two hinges, and the ends of the hydraulic rods of the two hydraulic cylinders 4 are hinged to the middle of one side of the forklift mast body 2 via two other hinges. Next, after the hydraulic rods of the two hydraulic cylinders 4 extend or retract from inside the two hydraulic cylinders 4, they can drive the forklift mast body 2 to tilt around the threaded rod 33 as the axis. The C-shaped block 51 is installed on one side of the forklift mast body 2 through the first mounting member 6. The first mounting member 6 consists of a first mounting block 61, a connecting rod 62, and first bolts 63. The first mounting block 61 is located on one side of the forklift mast body 2. One end of the connecting rod 62 is welded to one side of the first mounting block 61, and the C-shaped block 51 is welded to the other end of the connecting rod 62. There are four first bolts 63, and the four first bolts 63 are threaded through the four corners of one side of the first mounting block 61. All four first bolts 63 are threadedly connected to the forklift mast body 2, thereby allowing the first C-shaped block 51 to tilt. A mounting block 61 is fixedly installed on one side of the forklift mast body 2, and at the same time, the connecting rod 62 is fixed, so that the connecting rod 62 can support the C-shaped block 51 in real time. The fixed rod 52 is installed on one of the corners of the top of the forklift body 1 through the second mounting member 7. The second mounting member 7 consists of a second mounting block 71 and a second bolt 72. The second mounting block 71 is located at one of the corners of the top of the forklift body 1. There are four second bolts 72, and the four second bolts 72 are threaded through the four corners of the top of the second mounting block 71. The four second bolts 72 are all threadedly connected to one of the corners of the top of the forklift body 1, so that the second mounting block 71 can be fixedly installed on one of the corners of the top of the forklift body 1, thereby supporting the fixed rod 52.
[0020] Reference Figure 2 and Figure 3 A first pressure sensor 53 and a second pressure sensor 54 are respectively installed at one end of the top and one end of the bottom of the fixing rod 52. Both the first pressure sensor 53 and the second pressure sensor 54 are located inside the U-shaped block 51. A mounting plate 55 is welded to the inner top of the forklift body 1. A PLC controller 56 is installed on one side of the mounting plate 55. The first pressure sensor 53 and the second pressure sensor 54 are electrically connected to the input terminal of the PLC controller 56 through two wires. In this way, the PLC controller 56 can receive the feedback values of the first pressure sensor 53 and the second pressure sensor 54 and then analyze and process them. The PLC controller 56 is equipped with a hydraulic control system for controlling the action of the two hydraulic cylinders 4. By setting the pressure range value on the PLC controller 56, when the forklift mast 2 tilts, it will drive the U-shaped block 51 to tilt through the first mounting part 6. At this time, the inner top wall or inner bottom wall of the U-shaped block 51 will touch the first pressure sensor 54. The pressure sensor 53 or the second pressure sensor 54 pressurizes the forklift mast 2, indicating that the forklift mast 2 is tilted. The pressure sensor 53 or the second pressure sensor 54 will feed back the data value to the PLC controller 56. The PLC controller 56 will analyze the data value and, if leveling is required, will send a control command to the hydraulic control system to control the two hydraulic cylinders 4. This will cause the hydraulic rods of the two hydraulic cylinders 4 to extend or retract from inside the two hydraulic cylinders 4. At this time, the forklift mast 2 will be tilted in the opposite direction by the hydraulic rods of the two hydraulic cylinders 4. If the data value fed back by the first pressure sensor 53 and the second pressure sensor 54 to the PLC controller 56 is zero, it means that the forklift mast 2 has been leveled. Then, the PLC controller 56 will send a control command to the hydraulic control system to stop the two hydraulic cylinders 4 from working.
[0021] Reference Figure 2 and Figure 3 A corrugated hose 57 is provided between the forklift body 1 and the forklift mast body 2. One end of the corrugated hose 57 is bonded to one side of the fixing rod 52, and the other end of the corrugated hose 57 is bonded to one side of the PLC controller 56. Both wires pass through the corrugated hose 57, thereby protecting the two wires.
[0022] The implementation principle of the automatic leveling device for the forklift mast in this embodiment is as follows: During use, the PLC controller 56 is activated, and a hydraulic control system for controlling the actions of the two hydraulic cylinders 4 is set in the PLC controller 56. Simultaneously, a pressure range value is set. The PLC controller 56 is preferably a CTSC-100 type. When the forklift mast body 2 tilts, it will drive the U-shaped block 51 to tilt via the first mounting component 6. At this time, the inner top or bottom wall of the U-shaped block 51 will touch the first pressure sensor 53 or the second pressure sensor 54 and increase pressure. If the U-shaped block 51 touches the first pressure sensor 53, it indicates that the top of the forklift mast body 2 is tilted towards the forklift body 1. If the U-shaped block 51 touches the second pressure sensor 54, it indicates that the top of the forklift mast body 2 is tilted away from the forklift body 1. Both the first pressure sensor 53 and the second pressure sensor 54 are preferably HD. In the YL-400A-T model, this indicates that the forklift mast 2 is tilted. The first pressure sensor 53 or the second pressure sensor 54 will send data values back to the PLC controller 56. The PLC controller 56 will analyze the data values and send control commands to the hydraulic control system, thereby controlling the two hydraulic cylinders 4. Both hydraulic cylinders 4 are preferably TN16-20 type, so that the hydraulic rods of the two hydraulic cylinders 4 extend from or retract into the two hydraulic cylinders 4. At this time, the forklift mast 2 will be tilted in the opposite direction by the hydraulic rods of the two hydraulic cylinders 4. If the data values fed back by the first pressure sensor 53 and the second pressure sensor 54 to the PLC controller 56 are zero during this process, it means that the forklift mast 2 has been leveled. Then the PLC controller 56 will send control commands to the hydraulic control system, thereby controlling the two hydraulic cylinders 4 to stop working.
[0023] Finally, the following points should be noted: First, in the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installation", "connection", and "linkage" should be interpreted broadly, and can be mechanical or electrical connections, or internal connections between two components, or direct connections. "Up", "down", "left", "right", etc. are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may change.
[0024] Secondly: The accompanying drawings of the embodiments disclosed in this utility model only involve the structures involved in the embodiments disclosed in this utility model. Other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of this utility model can be combined with each other.
[0025] Finally: The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
[0026] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.
Claims
1. The automatic leveling device for a forklift mast, comprising a forklift body (1), a forklift mast body (2), a C-shaped block (51) and a fixing rod (52), is characterized in that, The forklift mast body (2) is located on one side of the forklift truck body (1). One end of the bottom of the forklift truck body (1) is provided with a support mechanism (3) for supporting the forklift mast body (2). Two hydraulic cylinders (4) for tilting the forklift mast body (2) are movably installed at the top end of one side of the forklift truck body (1). The U-shaped block (51) is installed on one side of the forklift mast body (2) through a first mounting member (6). The fixed rod (52) is installed at one of the corners at the top end of the forklift truck body (1) through a second mounting member (7). One end of the top of the fixed rod (52) and one end of the bottom are respectively installed with a first pressure sensor (53) and a second pressure sensor (54). Both the first pressure sensor (53) and the second pressure sensor (54) are located inside the U-shaped block (51). The mounting plate (55) is welded to the inner top of the forklift truck body (1). A PLC controller (56) is installed on one side of the mounting plate (55). The first pressure sensor (53) and the second pressure sensor (54) are respectively electrically connected to the input end of the PLC controller (56) through two wires.
2. The automatic leveling device for a forklift mast according to claim 1, characterized in that: The support mechanism (3) consists of two first connecting blocks (31), two second connecting blocks (32) and a threaded plug (33). The two first connecting blocks (31) are welded to the bottom end of the forklift truck body (1). The two second connecting blocks (32) are respectively welded to two of the corners on one side of the forklift mast body (2). The opposite sides of the two second connecting blocks (32) are respectively in contact with the opposite sides of the two first connecting blocks (31). The threaded plug (33) movably penetrates through the two first connecting blocks (31) and the two second connecting blocks (32). A nut (34) is threadedly sleeved on one end of the threaded plug (33).
3. The automatic leveling device for a forklift mast according to claim 1, characterized in that: The first mounting member (6) consists of a first mounting block (61), a connecting rod (62) and a first bolt (63). The first mounting block (61) is located on one side of the forklift mast body (2). One end of the connecting rod (62) is welded to one side of the first mounting block (61). The U-shaped block (51) is welded to the other end of the connecting rod (62). There are four first bolts (63). The four first bolts (63) respectively threadedly penetrate through the four corners on one side of the first mounting block (61). The four first bolts (63) are all threadedly connected to the forklift mast body (2).
4. The automatic leveling device for a forklift mast according to claim 1, characterized in that: The second mounting member (7) consists of a second mounting block (71) and a second bolt (72). The second mounting block (71) is located at one of the corners at the top end of the forklift truck body (1). There are four second bolts (72). The four second bolts (72) respectively threadedly penetrate through the four corners at the top end of the second mounting block (71). The four second bolts (72) are all threadedly connected to one of the corners at the top end of the forklift truck body (1).
5. The automatic leveling device for a forklift mast according to claim 1, characterized in that: A corrugated hose (57) is provided between the forklift body (1) and the forklift door frame (2), one end of the corrugated hose (57) is bonded to one side of the fixing rod (52), and the other end of the corrugated hose (57) is bonded to one side of the PLC controller (56), and both of the two wires pass through the corrugated hose (57).
6. The automatic leveling device for a forklift mast according to claim 1, characterized in that: One end of the two hydraulic cylinders (4) is movably hinged to the top of one side of the forklift body (1) through two hinges, and the ends of the hydraulic rods of the two hydraulic cylinders (4) are movably hinged to the middle of one side of the forklift door frame (2) through the other two hinges.