Forklift mast lift balance adjustment device

Abstract

The utility model relates to the technical field of fork truck portal, concretely relates to a fork truck portal lifting balance adjusting device, including outer portal, the both ends of the top of outer portal all are established with sliding slot, the inside slide connection of sliding slot has inner portal, both ends of outer portal inner wall all are installed with oil cylinder, the one side of inner portal bottom is installed with fork frame, the both ends of the other side of inner portal bottom all are installed with adjusting seat, install movable sliding mechanism on adjusting seat and oil cylinder, movable sliding mechanism includes movable assembly and positioning assembly, movable assembly is used for to the height difference between two groups of oil cylinder output end and inner portal between supplement, positioning assembly is used for after adjusting the position fixed, the utility model discloses simple structure, convenient operation has reduced the screw structure, has lightened the labor of staff, is convenient for staff to adjust locking fast, has further improved the adjustment efficiency.

Description

Technical Field

[0001] This utility model relates to the field of forklift mast technology, specifically to a forklift mast lifting balance adjustment device. Background Technology

[0002] The forklift mast is the main load-bearing structure for forklifts, responsible for lifting and lowering goods. During operation, the piston rod of the lifting cylinder extends, pushing the inner mast upwards along the outer mast. The fork carriage and forks mounted on the inner mast rise accordingly, thus lifting the goods. During descent, the piston rod retracts, and the inner mast slides downwards along the outer mast under gravity, lowering the forks and goods. Throughout the lifting and lowering process, the mast must withstand the weight of the goods and various external forces during operation. A well-designed structure ensures stability. Existing forklift masts adjust their height using cylinders at both ends. After a period of use, these cylinders may become asynchronous, causing the mast to tilt horizontally and affecting its usability.

[0003] To solve the above-mentioned technical problems, Chinese Patent No. CN217264663U discloses a forklift mast lifting balance adjustment device, which includes a fixing bolt, an adjusting nut and a locking screw. Adjusting screw holes are vertically opened at both ends of the inner mast at the top of the forklift mast cylinder. The adjusting holes are coaxial with the cylinder. The adjusting nut is threaded in the adjusting screw hole. The fixing bolt passes through the adjusting nut and is threadedly connected to the top of the cylinder.

[0004] Although the existing technical solution can compensate for the manufacturing error of the inner mast and the cylinder support point, it requires turning each set of fixing bolts, adjusting nuts and locking screws one by one to adjust and position the position, which is cumbersome and time-consuming, thus affecting the adjustment efficiency. Utility Model Content

[0005] The purpose of this utility model is to provide a forklift mast lifting balance adjustment device to solve the problem mentioned in the background art that the adjustment device requires twisting each set of fixing bolts, adjusting nuts and locking screws one by one to adjust and position, which is cumbersome and time-consuming, thus affecting the adjustment efficiency.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A forklift mast lifting and balancing adjustment device includes an outer mast, with sliding grooves at both ends of the top of the outer mast. An inner mast is slidably connected to the inner side of the sliding grooves. Hydraulic cylinders are installed at both ends of the inner wall of the outer mast. A fork carriage is installed on one side of the bottom of the inner mast, and adjusting seats are installed at both ends of the other side of the bottom of the inner mast. A movable sliding mechanism is installed on the adjusting seats and the hydraulic cylinders. The movable sliding mechanism includes a movable component and a positioning component. The movable component is used to compensate for the height difference between the output ends of the two sets of hydraulic cylinders and the inner mast. The positioning component is used to fix the position after adjustment.

[0008] As a preferred embodiment of this utility model, the movable component includes an adjustment groove formed on one side of the outer wall of the adjustment seat, an adjustment plate slidably connected to the inner side of the adjustment groove, a locking seat installed on one side of the outer wall of the adjustment plate, a synchronization groove formed on the outer wall of the adjustment plate on the side of the locking seat, a synchronization block slidably connected to the inner side of the synchronization groove, the cross-section of the synchronization block and the synchronization groove being T-shaped, and one end of the outer wall of the adjustment plate being fixedly connected to the output end of the hydraulic cylinder.

[0009] As a preferred embodiment of this utility model, the positioning component includes a crimping seat installed at the other end of the synchronization block. A first rubber pad is installed on the side of the crimping seat near the locking seat. A through hole is opened at one end of the first rubber pad. A pressure block is installed on the outer wall of the crimping seat at the through hole.

[0010] As a preferred embodiment of this utility model, a pressure groove is provided on one side of the outer wall of the locking seat, the pressure block is slidably connected to the pressure groove, and abutment grooves are provided on both sides of the pressure groove inside the locking seat. An abutment plate is slidably connected to the inner side of the abutment groove, and a first spring is installed between one side of the outer wall of the abutment plate and the inner wall of the abutment groove.

[0011] As a preferred embodiment of this utility model, the opposite ends of the abutment plate and the pressure block are provided with corresponding slopes, the other end of the inner side of the pressure groove is embedded with a second rubber pad, both ends of the top side of the locking seat are provided with movable grooves extending to the inner side of the abutment groove, the inner side of the movable groove is slidably connected with a movable rod, the other end of the movable rod is fixedly connected to one side of the abutment plate, and the other end of the movable rod is rotatably connected to a pull ring.

[0012] As a preferred embodiment of this utility model, a pushing groove is provided on one side of the adjusting groove on the outer wall of the adjusting seat, a rubber column is slidably connected to the inner side of the pushing groove, an extension plate is installed at the other end of the rubber column, and the other end of the extension plate is fixedly connected to one side of the outer wall of the pressing seat.

[0013] As a preferred embodiment of this utility model, a positioning plate is installed on one side of the outer wall of the extension plate, and a threaded hole is opened inside the positioning plate, and a positioning screw is threadedly connected to the inner side of the threaded hole.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] In this invention, the height difference between the output ends of the two sets of hydraulic cylinders and the inner mast is compensated by the movable component, and the position is fixed after the adjustment is completed. The structure is simple and easy to operate, reducing the thread structure, reducing the workload of the staff, and making it easier for the staff to quickly adjust and lock, thus further improving the adjustment efficiency. Attached Figure Description

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

[0017] Figure 2 This is a partial three-dimensional structural diagram of the adjustment seat of this utility model;

[0018] Figure 3 This is a schematic diagram of the locking seat and pressing seat of this utility model.

[0019] In the diagram: 1. Outer mast; 2. Inner mast; 3. Hydraulic cylinder; 4. Positioning screw; 5. Adjusting seat; 6. Adjusting plate; 7. Locking seat; 8. Synchronizing block; 9. Pressing seat; 10. First rubber pad; 11. Pressing block; 12. Abutment plate; 13. First spring; 14. Second rubber pad; 15. Movable rod; 16. Rubber column; 17. Extension plate; 18. Positioning plate. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0021] Example: Please refer to Figures 1-3 This utility model provides a technical solution:

[0022] A forklift mast lifting and balancing adjustment device includes an outer mast 1. Sliding grooves are provided at both ends of the top of the outer mast 1. An inner mast 2 is slidably connected to the inner side of the sliding grooves. Hydraulic cylinders 3 are installed at both ends of the inner wall of the outer mast 1. A fork carriage is installed on one side of the bottom of the inner mast 2, and adjusting seats 5 are installed at both ends of the other side of the bottom of the inner mast 2. Movable sliding mechanisms are installed on the adjusting seats 5 and the hydraulic cylinders 3. The movable sliding mechanism includes a movable component and a positioning component. The movable component is used to compensate for the height difference between the output ends of the two sets of hydraulic cylinders 3 and the inner mast 2. The positioning component is used to fix the position after adjustment. This device is simple in structure and easy to operate, reducing threaded structures, lessening the workload of workers, facilitating quick adjustment and locking, and further improving adjustment efficiency.

[0023] In this embodiment, as Figure 1 , Figure 2 and Figure 3 As shown, the movable component includes an adjustment groove on one side of the outer wall of the adjustment seat 5. An adjustment plate 6 is slidably connected to the inner side of the adjustment groove. A locking seat 7 is installed on one side of the outer wall of the adjustment plate 6. A synchronization groove is opened on the outer wall of the adjustment plate 6 on one side of the locking seat 7. A synchronization block 8 is slidably connected to the inner side of the synchronization groove. The cross-section of the synchronization block 8 and the synchronization groove is T-shaped. One end of the outer wall of the adjustment plate 6 is fixedly connected to the output end of the hydraulic cylinder 3. First, the adjustment groove is opened on one side of the outer wall of the adjustment seat 5. The adjustment plate 6 slides inside the adjustment groove. Since one end of the outer wall of the adjustment plate 6 is fixedly connected to the output end of the hydraulic cylinder 3, when a height difference occurs during the process of the hydraulic cylinder 3 pushing the inner gantry 2, the adjustment plate 6 will slide accordingly in the adjustment groove to supplement the height difference.

[0024] In this embodiment, as Figure 1 , Figure 2 and Figure 3 As shown, the positioning component includes a crimping seat 9 installed at the other end of the synchronizing block 8. A first rubber pad 10 is installed on the side of the crimping seat 9 near the locking seat 7. A through hole is opened at one end of the first rubber pad 10. A pressing block 11 is installed on the outer wall of the crimping seat 9 at the through hole. Then, when the adjusting plate 6 slides, the synchronizing block 8 slides in the synchronizing groove on the outer wall of the adjusting plate 6. The cross-section of the synchronizing block 8 and the synchronizing groove is T-shaped to ensure sliding stability and drive other connected components to move together to ensure smooth and coordinated adjustment.

[0025] In this embodiment, as Figure 1 , Figure 2 and Figure 3As shown, a pressure groove is provided on one side of the outer wall of the locking seat 7, and the pressure block 11 is slidably connected to the pressure groove. Abutment grooves are provided on both sides of the pressure groove inside the locking seat 7. An abutment plate 12 is slidably connected to the inner side of the abutment groove. A first spring 13 is installed between one side of the outer wall of the abutment plate 12 and the inner wall of the abutment groove. Corresponding slopes are provided at the opposite ends of the abutment plate 12 and the pressure block 11. A second rubber pad 14 is embedded at the other end of the inner side of the pressure groove. A pushing groove is provided on one side of the outer wall of the adjusting seat 5 located in the adjusting groove. A rubber column 16 is slidably connected to the inner side of the sliding groove. An extension plate 17 is installed at the other end of the rubber column 16. The other end of the extension plate 17 is fixedly connected to one side of the outer wall of the pressing seat 9. A positioning plate 18 is installed on one side of the outer wall of the extension plate 17. A threaded hole is opened inside the positioning plate 18, and a positioning screw 4 is threadedly connected inside the threaded hole. Furthermore, after the movable component completes the adjustment of the height difference, the positioning component starts to work. The pressing seat 9 installed at the other end of the synchronous block 8 moves with the synchronous block 8. As the pressing seat 9 moves closer to the locking seat 7, it presses the first rubber pad 10 against the side of the locking seat 7. The pressing block 11 located at the through hole on the outer wall of the pressing seat 9 is inserted into the pressing groove on one side of the outer wall of the locking seat 7 as the pressing seat 9 moves closer and slides in the pressing groove. The locking seat 7 is located in the abutment grooves on both sides of the pressing groove. Under the elastic force of the first spring 13, the slope of the abutment plate 12 and the slope of the pressing block 11 cooperate to abut against each other. When the pressing block 11 is inserted into the pressing groove, the abutment plate 12 is squeezed. Press down, compress the first spring 13 and slide it into the abutment groove until the pressure block 11 reaches the innermost side of the pressure groove and squeezes the second rubber pad 14 back a certain distance. At this time, the elastic force of the first spring 13 causes the abutment plate 12 to pop out and tightly abut against the protruding ends on both sides of the pressure block 11. The rubber column 16 on the extension plate 17 is pressed against the inner side of the push groove to achieve quick positioning. Then, the positioning screw 4 is screwed into the threaded hole so that the end of the positioning screw 4 tightly abuts against the outer wall of the adjustment seat 5 to complete the locking of the adjustment position.

[0026] In this embodiment, as Figure 1 , Figure 2 and Figure 3 As shown, both ends of the top side of the locking seat 7 are provided with movable grooves extending into the inner side of the abutment groove. Movable rods 15 are slidably connected to the inner side of the movable grooves. The other end of the movable rods 15 is fixedly connected to one side of the abutment plate 12. The other end of the movable rods 15 is rotatably connected to a pull ring. Furthermore, if fine adjustment or unlocking is required later, the movable rods 15 extending into the movable grooves at both ends of the top side of the locking seat 7 can be pulled by the pull ring. The pull ring drives the movable rods 15 to slide in the movable grooves. The movable rods 15 pull the abutment plate 12, causing it to overcome the elastic force of the first spring 13 and move away from the pressure block 11, so that the pressure block 11 is no longer tightly locked. The rebound of the first rubber pad 10 and the second rubber pad 14 can bring the pressure block 11 out a distance. Then the relative positions of the adjusting plate 6 and the adjusting seat 5 can be readjusted.

[0027] The implementation principle of the forklift mast lifting balance adjustment device in this application embodiment is as follows: An adjustment groove is formed on one side of the outer wall of the adjustment seat 5. The adjustment plate 6 slides inside the adjustment groove. Since one end of the outer wall of the adjustment plate 6 is fixedly connected to the output end of the hydraulic cylinder 3, when a height difference occurs during the process of the hydraulic cylinder 3 pushing the inner mast 2, the adjustment plate 6 will slide accordingly within the adjustment groove to compensate for the height difference. While the adjustment plate 6 slides, the synchronizing block 8 slides within the synchronizing groove on the outer wall of the adjustment plate 6. The cross-section of the synchronizing block 8 and the synchronizing groove is T-shaped to ensure sliding stability and drive other connected components. The coordinated action ensures smooth and coordinated adjustment. After the moving component completes the adjustment of the height difference, the positioning component begins to work. The pressing seat 9, installed at the other end of the synchronizing block 8, moves closer to the locking seat 7 as the synchronizing block 8 moves. The side of the pressing seat 9 that is close to the locking seat 7 presses the first rubber pad 10. The pressing block 11 located at the through hole on the outer wall of the pressing seat 9 is inserted into the pressing groove opened on one side of the outer wall of the locking seat 7 as the pressing seat 9 moves closer and slides in the pressing groove. The locking seat 7 is located in the abutment groove on both sides of the pressing groove. The abutment plate 12 is under the elastic force of the first spring 13. Under the action, its slope surface and the slope surface of the pressure block 11 cooperate and abut against each other. When the pressure block 11 is inserted into the pressure groove, the abutment plate 12 is squeezed, compressing the first spring 13 and sliding into the abutment groove until the pressure block 11 reaches the innermost side of the pressure groove and squeezes the second rubber pad 14 to retract a certain distance. At this time, the elastic force of the first spring 13 causes the abutment plate 12 to pop out and tightly abut against the protruding ends on both sides of the pressure block 11. The rubber column 16 on the extension plate 17 is pressed against the inner side of the push groove to achieve quick positioning. Then, the positioning screw 4 is screwed into the threaded hole, so that the end of the positioning screw 4 tightly abuts against the adjustment seat. The outer wall of 5 completes the locking of the adjustment position. If fine adjustment or unlocking is required later, the pull ring is used to pull the movable rod 15, which extends from both ends of the top side of the locking seat 7 into the movable groove inside the abutment groove. The pull ring drives the movable rod 15 to slide in the movable groove. The movable rod 15 pulls the abutment plate 12, causing it to overcome the elastic force of the first spring 13 and move away from the pressure block 11, so that the pressure block 11 is no longer tightly locked. The rebound of the first rubber pad 10 and the second rubber pad 14 can bring the pressure block 11 out a distance. Then the relative position of the adjustment plate 6 and the adjustment seat 5 can be readjusted.

[0028] The control method of this utility model is through a controller. The control circuit of the controller can be implemented by simple programming by those skilled in the art. The power supply is also common knowledge in the field. Since this utility model is used to protect mechanical devices, the control method and circuit connection will not be explained in detail.

[0029] 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 claims and their equivalents.

Claims

1. A forklift mast lifting balance adjustment device, comprising an outer mast (1), characterized in that: The outer mast (1) has sliding grooves at both ends of its top. The inner mast (2) is slidably connected to the inner side of the sliding groove. The outer mast (1) has cylinders (3) installed at both ends of its inner wall. The inner mast (2) has a fork carriage installed on one side of its bottom. The inner mast (2) has adjusting seats (5) installed at both ends of the other side of its bottom. The adjusting seats (5) and cylinders (3) are equipped with movable sliding mechanisms. The movable sliding mechanism includes a movable component and a positioning component. The movable component is used to compensate for the height difference between the output ends of the two sets of cylinders (3) and the inner mast (2). The positioning component is used to fix the position after adjustment.

2. The forklift mast lifting balance adjustment device according to claim 1, characterized in that: The movable component includes an adjustment groove on one side of the outer wall of the adjustment seat (5), an adjustment plate (6) is slidably connected to the inner side of the adjustment groove, a locking seat (7) is installed on one side of the outer wall of the adjustment plate (6), a synchronization groove is provided on the outer wall of the adjustment plate (6) on the side of the locking seat (7), a synchronization block (8) is slidably connected to the inner side of the synchronization groove, the cross section of the synchronization block (8) and the synchronization groove is T-shaped, and one end of the outer wall of the adjustment plate (6) is fixedly connected to the output end of the oil cylinder (3).

3. The forklift mast lifting balance adjustment device according to claim 2, characterized in that: The positioning component includes a crimping seat (9) installed at the other end of the synchronization block (8). A first rubber pad (10) is installed on the side of the crimping seat (9) near the locking seat (7). A through hole is opened at one end of the first rubber pad (10). A pressure block (11) is installed on the outer wall of the crimping seat (9) at the through hole.

4. The forklift mast lifting balance adjustment device according to claim 3, characterized in that: A pressure groove is provided on one side of the outer wall of the locking seat (7), and the pressure block (11) is slidably connected to the pressure groove. An abutment groove is provided on both sides of the pressure groove inside the locking seat (7). An abutment plate (12) is slidably connected to the inner side of the abutment groove. A first spring (13) is installed between one side of the outer wall of the abutment plate (12) and the inner wall of the abutment groove.

5. A forklift mast lifting balance adjustment device according to claim 4, characterized in that: The opposite ends of the abutment plate (12) and the pressure block (11) are provided with corresponding slopes. The other end of the inner side of the pressure groove is embedded with a second rubber pad (14). Both ends of the top side of the locking seat (7) are provided with movable grooves extending to the inner side of the abutment groove. The movable groove is slidably connected with a movable rod (15). The other end of the movable rod (15) is fixedly connected to one side of the abutment plate (12). The other end of the movable rod (15) is rotatably connected to a pull ring.

6. The forklift mast lifting balance adjustment device according to claim 5, characterized in that: The outer wall of the adjusting seat (5) is provided with a pushing groove on one side of the adjusting groove. A rubber column (16) is slidably connected to the inner side of the pushing groove. An extension plate (17) is installed at the other end of the rubber column (16). The other end of the extension plate (17) is fixedly connected to one side of the outer wall of the pressing seat (9).

7. A forklift mast lifting balance adjustment device according to claim 6, characterized in that: A positioning plate (18) is installed on one side of the outer wall of the extension plate (17). A threaded hole is provided inside the positioning plate (18), and a positioning screw (4) is threadedly connected to the inside of the threaded hole.

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