Forklift cab height telescopic adjusting mechanism

Abstract

This utility model discloses a forklift cab height telescopic adjustment mechanism, relating to the field of forklift technology. It includes a chassis, on the top surface of which are mounted four rectangularly distributed hydraulic push rods. Each of the four hydraulic push rods has a telescopic component mounted on its piston rod tip. A common damping component is fixed between the four telescopic components, and a connecting plate is fixed to the top of each of the four telescopic components. This utility model uses the four hydraulic push rods in conjunction with an array of springs within the telescopic components to absorb impacts and dampers to suppress low-frequency oscillations, effectively maintaining the stability of the forklift cab. Simultaneously, the photoelectric sensors of the grading and detection components are linked, allowing the driver to clearly know the cab's height level. It also enables automatic positioning at three height levels, effectively reducing the accident rate. The spiral telescopic protective layer protects the chassis components, greatly isolating them from dust and oil, and increasing the interval between failures.

Description

Technical Field

[0001] This utility model relates to the field of forklift technology, specifically to a forklift cab height telescopic adjustment mechanism. Background Technology

[0002] In forklift warehousing operations, the fixed cab height leads to two major problems: Firstly, maneuverability is limited. When lowering the overall vehicle height in low-ceilinged spaces, the cab cannot be lowered, forcing the driver to bend over, increasing fatigue and safety hazards. Secondly, during high-level stacking, the cab cannot be raised, obstructing the driver's view of the fork tips and increasing the risk of collisions. Therefore, cab height adjustment mechanisms exist to address these issues, but current height adjustment technology has significant shortcomings.

[0003] 1. The cab is raised and lowered using a single hydraulic cylinder, but it lacks a buffer mechanism. When the road surface is bumpy, the cab is prone to shaking, which leads to a decrease in operating accuracy.

[0004] 2. Operators often need to switch between several fixed heights, such as door height, standard stacking height, and high-level picking height. Manual adjustment is time-consuming and may not be accurate. In addition, raising the cab may pose a risk of collision with obstacles above the warehouse. Utility Model Content

[0005] The purpose of this invention is to provide a forklift cab height telescopic adjustment mechanism to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a forklift cab height telescopic adjustment mechanism, comprising a chassis, four rectangularly distributed hydraulic push rods mounted on the top outer surface of the chassis, and telescopic components mounted on the top ends of the piston rods of the four hydraulic push rods, a common damping component fixed between the four telescopic components, and a connecting plate fixed to the top end of each of the four telescopic components, a common mounting plate fixed to the top outer surface of the four connecting plates, and the mounting plate being used to connect the forklift cab, the outer surface of the mounting plate and the top outer surface of the chassis being fitted with the same U-shaped telescopic protective layer, and a grading component mounted in the middle of one side of the mounting plate, and a detection component mounted in the middle of one side of the chassis, the detection component being used to detect the grade of the grading component.

[0007] Furthermore, all four telescopic components include a rectangular box, with a sliding plate slidably connected inside the rectangular box. The bottom inner wall of the rectangular box is equipped with springs that are evenly distributed, and the top outer surface of the rectangular box has two symmetrically distributed sliding openings. The interior of each sliding opening is slidably connected to a connecting post, with the bottom end of the connecting post fixedly connected to the sliding plate and the top end of the connecting post fixedly connected to the connecting plate. The bottom outer surface of the rectangular box is fixedly connected to the top end of the piston rod of the hydraulic push rod.

[0008] Furthermore, the damping assembly includes an I-beam, with its four ends fixedly connected to four rectangular boxes. A mounting frame is installed in the middle of the bottom outer surface of the I-beam, and a circular opening is provided in the middle of the bottom outer surface of the I-beam. A damper is installed inside the circular opening, and the bottom outer surface of the damper is fixedly connected to the mounting frame. The top of the damper contacts the mounting plate.

[0009] Furthermore, the grading component includes an L-shaped plate, which is fixedly connected to the mounting plate. The bottom outer surface of the L-shaped plate has three staggered grading openings, and contact blocks are installed inside the grading openings.

[0010] Furthermore, the detection component includes a fixed plate, a first vertical plate, a second vertical plate, and a third vertical plate. The fixed plate is fixed to the middle of one side of the outer surface of the chassis. The first vertical plate, the second vertical plate, and the third vertical plate are fixed to the top outer surface of the fixed plate in an alternating manner. A fixing block is installed on the top of one side of each of the first vertical plate, the second vertical plate, and the third vertical plate. A circular groove is opened at one end of each of the three fixing blocks, and a photoelectric sensor is installed inside each of the three circular grooves. The signal end of the photoelectric sensor is connected to a microprocessor through a signal line.

[0011] Furthermore, two symmetrically distributed mounting blocks are installed on both sides of the chassis, and the top surface of the mounting blocks has mounting openings.

[0012] Furthermore, two symmetrically distributed telescopic columns are installed in the middle of the top outer surface of the chassis, and spring columns are installed on the top outer surfaces of the chassis on both sides of the hydraulic push rod. The top of the telescopic columns is fixedly connected to the I-beam plate, and the top of the spring columns is fixedly connected to the connecting plate.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] A forklift cab height telescopic adjustment mechanism uses four hydraulic push rods in conjunction with an array of springs within the telescopic assembly to absorb impacts and a damper to suppress low-frequency swaying, effectively maintaining the stability of the forklift cab. At the same time, the photoelectric sensors of the grading and detection components are linked, allowing the driver to clearly know the height level of the cab. It can also achieve automatic positioning of three height levels, effectively reducing the accident rate.

[0015] Meanwhile, the spiral telescopic protective layer can protect the components on the chassis, greatly isolating them from dust and oil, thus increasing the interval between failures. The telescopic rod can limit the movement of the I-beam plate, and the spring column can effectively limit the movement of the connecting plate. The I-beam plate is connected to the four telescopic components to maintain the same height, allowing the damper to effectively contact the mounting plate, reducing the horizontal error of the mounting plate during the lifting process, and solving the problem of single-cylinder drive off-center load. Attached Figure Description

[0016] Figure 1This is a schematic diagram of the overall structure of this utility model;

[0017] Figure 2 This is a schematic diagram of the internal structure of the present invention;

[0018] Figure 3 This is a schematic diagram of the hydraulic push rod, telescopic assembly, and damping assembly of this utility model;

[0019] Figure 4 This is a schematic diagram of the cross-sectional structure of the telescopic component of this utility model;

[0020] Figure 5 This is a schematic diagram of the grading component and the detection component of this utility model.

[0021] In the diagram: 1. Chassis; 2. Hydraulic push rod; 3. Telescopic assembly; 31. Rectangular box; 32. Spring; 33. Slide plate; 34. Connecting column; 4. Connecting plate; 5. Spring column; 6. Telescopic column; 7. I-beam plate; 8. Mounting frame; 9. Damper; 10. Mounting plate; 11. Grading assembly; 111. L-shaped plate; 112. Contact block; 12. Detection assembly; 121. Fixing plate; 122. First vertical plate; 123. Second vertical plate; 124. Third vertical plate; 125. Fixing block; 126. Photoelectric sensor; 13. U-shaped telescopic protective layer. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] like Figures 1-5 As shown, this utility model provides a technical solution: a forklift cab height telescopic adjustment mechanism, including a chassis 1. Four rectangularly distributed hydraulic push rods 2 are installed on the top outer surface of the chassis 1, and telescopic components 3 are installed at the top of the piston rods of the four hydraulic push rods 2. The same damping component is fixed between the four telescopic components 3, and a connecting plate 4 is fixed at the top of the four telescopic components 3. The same mounting plate 10 is fixed on the top outer surface of the four connecting plates 4, and the mounting plate 10 is used to connect the forklift cab. The same U-shaped telescopic protective layer 13 is installed on the outer surface of the mounting plate 10 and the top outer surface of the chassis 1. A grading component 11 is installed in the middle of one side of the mounting plate 10, and a detection component 12 is installed in the middle of one side of the chassis 1. The detection component 12 is used to detect the grade of the grading component 11.

[0024] It should be noted that the rectangular layout of the four hydraulic push rods 2 forms a stable support frame, which, combined with the spiral telescopic protective layer 13, achieves dynamic sealing. The graded component 11 and the detection component 12 constitute a closed-loop height feedback system.

[0025] Each of the four telescopic components 3 includes a rectangular box 31, and a sliding plate 33 is slidably connected inside the rectangular box 31. Springs 32 are evenly distributed on the bottom inner wall of the rectangular box 31, and two symmetrically distributed sliding openings are opened on the top outer surface of the rectangular box 31. A connecting post 34 is slidably connected inside the two sliding openings. The bottom end of the connecting post 34 is fixedly connected to the sliding plate 33, and the top end of the connecting post 34 is fixedly connected to the connecting plate 4. The bottom outer surface of the rectangular box 31 is fixedly connected to the top end of the piston rod of the hydraulic push rod 2.

[0026] It should be noted that the equidistantly distributed springs 32 form a matrix buffer layer, and the double sliding joint design ensures that the connecting column 34 does not swing or rise, effectively decomposing multi-directional impact loads.

[0027] The damping assembly includes an I-beam 7, and the four ends of the I-beam 7 are fixedly connected to four rectangular boxes 31 respectively. A mounting frame 8 is installed in the middle of the bottom outer surface of the I-beam 7, and a circular opening is provided in the middle of the bottom outer surface of the I-beam 7. A damper 9 is provided inside the circular opening, and the bottom outer surface of the damper 9 is fixedly connected to the mounting frame 8. The top of the damper 9 is in contact with the mounting plate 10.

[0028] It should be noted that the I-beam 7 rigidly connects the four sets of expansion joints 3 to form an anti-torsional frame, and the central damper 9 directly transmits the vibration energy of the mounting plate 10 to achieve efficient dissipation.

[0029] The grading component 11 includes an L-shaped plate 111, which is fixedly connected to the mounting plate 10. The bottom outer surface of the L-shaped plate 111 has three staggered grading openings, and contact blocks 112 are installed inside the grading openings.

[0030] It should be noted that the three-level staggered layout of the L-shaped plate 111 corresponds to different working heights, and the contact block 112 uses permanent magnet material to enhance the reliability of signal triggering.

[0031] The detection assembly 12 includes a fixing plate 121, a first vertical plate 122, a second vertical plate 123, and a third vertical plate 124. The fixing plate 121 is fixed to the middle of one side of the outer surface of the chassis 1. The first vertical plate 122, the second vertical plate 123, and the third vertical plate 124 are fixed to the top outer surface of the fixing plate 121 in an alternating manner. A fixing block 125 is installed on the top of one side of each of the first vertical plate 122, the second vertical plate 123, and the third vertical plate 124. A circular groove is opened at one end of each of the three fixing blocks 125, and a photoelectric sensor 126 is installed inside each of the three circular grooves. The signal end of the photoelectric sensor 126 is connected to a microprocessor through a signal line.

[0032] It should be noted that the staggered vertical plate design adapts to the movement trajectory of the L-shaped plate 111, and the circular groove mounting structure of the photoelectric sensor 126 avoids ambient light interference, ensuring millimeter-level positioning accuracy.

[0033] Two symmetrically distributed mounting blocks are installed on both sides of the chassis 1, and the top surface of the mounting blocks has mounting openings.

[0034] It should be noted that the dual mounting blocks provide standardized interfaces, and the mounting ports have built-in rubber damping bushings to reduce transmitted vibrations.

[0035] Two symmetrically distributed telescopic columns 6 are installed in the middle of the top surface of the chassis 1, and spring columns 5 are installed on the top surface of the chassis 1 on both sides of the hydraulic push rod 2. The top of the telescopic column 6 is fixedly connected to the I-beam plate 7, and the top of the spring column 5 is fixedly connected to the connecting plate 4.

[0036] Working principle: The forklift cab can be installed on the top surface of the mounting plate 10. Four hydraulic push rods 2 push the rectangular box 31 of the telescopic assembly 3 to rise. The spring 32 pre-compresses the sliding plate 33 and drives the mounting plate 10 to rise and fall through the connecting column 34 and the connecting plate 4. The L-shaped plate 111 on the side of the mounting plate 10 moves accordingly. Its contact block 112 triggers the corresponding photoelectric sensor 126 to realize height gear recognition and locking. Under bumpy conditions, the spring 32 absorbs high-frequency vibration, the damper 9 dissipates low-frequency energy, the spring column 5 suppresses side tilting, and the spiral telescopic protective layer 13 synchronously expands and contracts to seal the internal components.

[0037] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended embodiments and their equivalents.

Claims

1. A forklift cab height telescopic adjustment mechanism, comprising a chassis (1), characterized in that: The top surface of the chassis (1) is equipped with four rectangularly distributed hydraulic push rods (2), and the piston rods of the four hydraulic push rods (2) are equipped with telescopic components (3). The four telescopic components (3) are fixed with the same damping component, and the top of the four telescopic components (3) is fixed with a connecting plate (4). The top surface of the four connecting plates (4) is fixed with the same mounting plate (10), and the mounting plate (10) is used to connect the forklift cab. The outer surface of the mounting plate (10) and the top surface of the chassis (1) are equipped with the same spiral telescopic protective layer (13). A grading component (11) is installed in the middle of one side of the mounting plate (10), and a detection component (12) is installed in the middle of one side of the chassis (1). The detection component (12) is used to detect the grade of the grading component (11).

2. The forklift cab height telescopic adjustment mechanism according to claim 1, characterized in that: All four telescopic components (3) include a rectangular box (31), and a sliding plate (33) is slidably connected inside the rectangular box (31). Springs (32) are evenly distributed on the bottom inner wall of the rectangular box (31), and two symmetrically distributed sliding openings are opened on the top outer surface of the rectangular box (31). A connecting column (34) is slidably connected inside the two sliding openings. The bottom end of the connecting column (34) is fixedly connected to the sliding plate (33), and the top end of the connecting column (34) is fixedly connected to the connecting plate (4). The bottom outer surface of the rectangular box (31) is fixedly connected to the top end of the piston rod of the hydraulic push rod (2).

3. The forklift cab height telescopic adjustment mechanism according to claim 1, characterized in that: The damping assembly includes an I-beam (7), and the four ends of the I-beam (7) are fixedly connected to four rectangular boxes (31) respectively. A mounting frame (8) is installed in the middle of the bottom outer surface of the I-beam (7), and a round opening is provided in the middle of the bottom outer surface of the I-beam (7). A damper (9) is provided inside the round opening, and the bottom outer surface of the damper (9) is fixedly connected to the mounting frame (8). The top of the damper (9) is in contact with the mounting plate (10).

4. The forklift cab height telescopic adjustment mechanism according to claim 1, characterized in that: The grading component (11) includes an L-shaped plate (111) and the L-shaped plate (111) is fixedly connected to the mounting plate (10). The bottom outer surface of the L-shaped plate (111) has three staggered grading openings, and contact blocks (112) are installed inside the grading openings.

5. The forklift cab height telescopic adjustment mechanism according to claim 1, characterized in that: The detection component (12) includes a fixing plate (121), a first vertical plate (122), a second vertical plate (123), and a third vertical plate (124). The fixing plate (121) is fixed to the middle of one side of the outer surface of the chassis (1). The first vertical plate (122), the second vertical plate (123), and the third vertical plate (124) are fixed to the top outer surface of the fixing plate (121) in an alternating manner. A fixing block (125) is installed on the top of one side of the first vertical plate (122), the second vertical plate (123), and the third vertical plate (124). A circular groove is opened at one end of each of the three fixing blocks (125), and a photoelectric sensor (126) is installed inside each of the three circular grooves. The signal end of the photoelectric sensor (126) is connected to a microprocessor through a signal line.

6. The forklift cab height telescopic adjustment mechanism according to claim 1, characterized in that: The chassis (1) has two symmetrically distributed mounting blocks installed on both sides of its outer surface, and the top of the mounting blocks has an installation opening.

7. The forklift cab height telescopic adjustment mechanism according to claim 1, characterized in that: Two symmetrically distributed telescopic columns (6) are installed in the middle of the top surface of the chassis (1), and spring columns (5) are installed on the top surface of the chassis (1) on both sides of the hydraulic push rod (2). The top of the telescopic column (6) is fixedly connected to the I-beam plate (7), and the top of the spring column (5) is fixedly connected to the connecting plate (4).

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