Forklift suspension locking device

Abstract

The utility model relates to the technical field of forklifts, in particular to a forklift suspension locking device which comprises a locking rod and a limiting seat, a plurality of inserting plates are fixedly connected to one side of the locking rod, a plurality of inserting grooves are formed in one side of the limiting seat, the inserting grooves are used for allowing the inserting plates to be installed and inserted, and the limiting seat is fixedly connected with the locking rod. A groove is formed in one end of the locking rod, a connecting block is installed and inserted into the groove, one end of the connecting block is fixedly connected with one side of a bearing plate, and a plurality of pulleys are rotatably installed on the other side of the bearing plate. According to the locking device, traditional single-point stress is converted into multi-direction dispersed bearing through rigid connection of the multiple inserting plates and the corresponding inserting grooves, then the service life of the locking device can be prolonged, the lower end of the locking rod fixes the bearing plate through the connecting blocks inserted into the grooves, the multiple pulleys on the bearing plate make rolling contact with the suspension plate spring, sliding friction is converted into rolling friction, and therefore the locking device is stable and reliable. And frictional resistance and abnormal sound in the dynamic locking process are reduced.

Description

Technical Field

[0001] This utility model relates to the field of forklift technology, specifically to a forklift suspension locking device. Background Technology

[0002] The forklift suspension system is a collective term for all force-transmitting connections between the forklift's frame and axles or wheels. Its function is to transmit forces and torques acting between the wheels and frame, buffer impacts transmitted from uneven road surfaces to the frame or body, and dampen the resulting vibrations to ensure smooth forklift operation. When a forklift is handling goods (especially heavy loads or high-level stacking), if the suspension system is in a free-dampening state, the forklift body may sway due to inertia or uneven road surfaces, causing the goods to shift or even tip over. Locking suspension can suppress unnecessary elastic deformation, maintain a rigid connection between the forks and the body, and ensure smooth lifting and movement of goods.

[0003] Application number CN202210324184.1 discloses a suspension locking device for a high-speed telescopic forklift, comprising a cylinder mounting base fixedly connected to the vehicle frame and located above the left side of the front axle axis; a limiting seat fixedly connected to the vehicle frame and located above the left side of the front axle axis; and a locking rod hinged to the vehicle frame at its upper center and directly opposite the front axle axis, the locking rod being close to the right side of the limiting seat and its lower end corresponding to the middle of the suspension leaf spring. The device also includes a locking cylinder whose base is hinged to the cylinder mounting base via a pin, the piston of which is hinged to the upper end of the locking rod. A two-way hydraulic lock is provided on the locking cylinder, and electrically operated two-way hydraulic lock can extend or retract the piston of the locking cylinder. This device can lock the suspension leaf spring during high-speed telescopic forklift operation, ensuring reliable integrity, improving the safety of forklift operations, and achieving an organic combination of high-speed mobility and low-speed loading and unloading functions.

[0004] However, in the locked state, the upward thrust of the suspension leaf spring on the locking rod is entirely transferred to the pin shaft. This may cause excessive stress on the pin shaft, which can easily lead to wear, deformation, or even breakage under long-term use, affecting reliability and lifespan. Furthermore, the lack of a sliding system between the locking rod and the suspension leaf spring results in a significant increase in frictional resistance between them due to rigid contact. This can easily cause abnormal noise or jamming during dynamic locking. Therefore, a forklift suspension locking device is proposed. Utility Model Content

[0005] To address the problems in the existing technology, this utility model provides a forklift suspension locking device.

[0006] The technical solution adopted by this utility model to solve its technical problem is a forklift suspension locking device, including a locking rod and a limiting seat. A plug plate is fixedly connected to one side of the locking rod. Multiple plug plates are provided. A slot is opened on one side of the limiting seat. Multiple slots are provided for the insertion of plug plates.

[0007] One end of the locking rod has a groove for inserting the connecting block. One end of the connecting block is fixedly connected to one side of the pressure plate. Multiple pulleys are rotatably mounted on the other side of the pressure plate.

[0008] By adopting the above technical solution, the rigid connection between multiple insert plates and corresponding slots transforms the traditional single-point force into multi-directional distributed load bearing, thereby extending the service life of the locking device.

[0009] The lower end of the locking rod is fixed to the pressure plate by a connecting block inserted through a groove. Multiple pulleys on the pressure plate are in rolling contact with the suspension plate spring, which converts sliding friction into rolling friction, reducing frictional resistance and abnormal noise during the dynamic locking process.

[0010] Specifically, a magnetic plate is provided on one side of the locking rod, and the magnetic plate is magnetically connected to the limiting seat.

[0011] By adopting the above technical solution, the magnetic plate is fixed by magnetic attraction when the locking rod contacts the limiting seat.

[0012] Specifically, the connecting block has a first threaded hole inside, and the locking rod has a second threaded hole on one side. The first threaded hole and the second threaded hole are compatible and are both used for screwing in bolts.

[0013] By adopting the above technical solution, after the connecting block is inserted into the groove, it can be quickly tightened by the bolts passing through the first threaded hole and the second threaded hole. This detachable connection method not only ensures the stable installation of the pressure plate, but also facilitates the individual replacement of worn parts during later maintenance.

[0014] Specifically, the locking rod is rotatably connected to the forklift beam via a third pin, and the limiting seat is fixedly connected to one side of the forklift beam via a bolt set.

[0015] By adopting the above technical solution, the third pin serves as the rotation fulcrum of the locking rod, allowing for precise angle adjustment under hydraulic drive.

[0016] Specifically, the end of the locking rod away from the pressure plate is rotatably connected to one end of the piston push rod via a second pin, and the other end of the piston push rod is fixedly connected to the output end of the locking cylinder.

[0017] Specifically, the base of the locking cylinder is rotatably connected to the cylinder mounting seat via a first pin, and the cylinder mounting seat is fixedly connected to one side of the forklift beam via a bolt group.

[0018] By adopting the above technical solution, the locking cylinder outputs a smooth thrust through the piston push rod, and with the hinge design of the second pin shaft, the linear motion is efficiently converted into the rotational motion of the locking rod.

[0019] The beneficial effects of this utility model are:

[0020] (1) The forklift suspension locking device described in this utility model transforms the traditional single-point force into multi-directional distributed bearing through the rigid connection of multiple insert plates with corresponding slots, thereby extending the service life of the locking device.

[0021] (2) The forklift suspension locking device described in this utility model has a pressure plate fixed at the lower end of the locking rod by a connecting block inserted into a groove. Multiple pulleys on the pressure plate roll into contact with the suspension plate spring, converting sliding friction into rolling friction, thereby reducing frictional resistance and abnormal noise during the dynamic locking process. Attached Figure Description

[0022] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0023] Figure 1 This is a schematic diagram of the planar structure of the present invention;

[0024] Figure 2 This is a schematic diagram of the locking state structure of this utility model;

[0025] Figure 3 This is a schematic diagram of the pressure plate structure of this utility model;

[0026] In the diagram: 1. First pin; 2. Cylinder mounting seat; 3. Locking cylinder; 4. Piston push rod; 5. Second pin; 6. Third pin; 7. Locking rod; 8. Pressure plate; 9. Pulley; 10. Magnetic plate; 11. Insert plate; 12. Slot; 13. Limiting seat; 14. Connecting block; 15. First threaded hole; 16. Second threaded hole; 17. Groove. Detailed Implementation

[0027] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0028] As one embodiment of this utility model, such as Figures 1-3As shown, the forklift suspension locking device of this utility model includes a locking rod 7 and a limiting seat 13. A plug plate 11 is fixedly connected to one side of the locking rod 7. Multiple plug plates 11 are provided. A slot 12 is opened on one side of the limiting seat 13. Multiple slots 12 are provided for the insertion of plug plates 11.

[0029] One end of the locking rod 7 is provided with a groove 17, which is used for the installation and insertion of the connecting block 14. One end of the connecting block 14 is fixedly connected to one side of the pressure plate 8, and multiple pulleys 9 are rotatably installed on the other side of the pressure plate 8.

[0030] In use, when the locking rod 7 is rotated to a vertical position, the multiple insert plates 11 on its side are precisely inserted into the corresponding slots 12 of the limiting seat 13, forming a multi-point rigid connection. This multi-insertion structure can disperse the upward thrust generated by the suspension spring to multiple contact points, effectively avoiding stress concentration, while enhancing the overall structure's shear resistance. The lower end of the locking rod 7 is fixed to the pressure plate 8 by the connecting block 14 inserted into the groove 17. The multiple pulleys 9 on the pressure plate 8 are in rolling contact with the suspension spring, converting sliding friction into rolling friction, reducing frictional resistance and abnormal noise during the dynamic locking process.

[0031] The present invention also includes a magnetic suction plate 10 on one side of the locking rod 7, and the magnetic suction plate 10 is magnetically connected to the limiting seat 13.

[0032] In use, the magnetic plate 10 is fixed by magnetic attraction when the locking rod 7 contacts the limiting seat 13.

[0033] The present invention also includes a first threaded hole 15 inside the connecting block 14 and a second threaded hole 16 on one side of the locking rod 7. The first threaded hole 15 and the second threaded hole 16 are adapted to each other and are both used for screwing in bolts.

[0034] When in use, after the connecting block 14 is inserted into the groove 17, it is quickly tightened by the bolts passing through the first threaded hole 15 and the second threaded hole 16. This detachable connection method not only ensures the stable installation of the pressure plate 8, but also facilitates the individual replacement of worn parts during later maintenance.

[0035] The present invention also includes that the locking rod 7 is rotatably connected to the forklift beam via the third pin 6, and the limiting seat 13 is fixedly connected to one side of the forklift beam via a bolt group.

[0036] In use, the third pin 6 serves as the fulcrum for the rotation of the locking rod 7, allowing for precise angle adjustment under hydraulic drive.

[0037] This utility model also includes that the end of the locking rod 7 away from the pressure plate 8 is rotatably connected to one end of the piston push rod 4 through the second pin 5, and the other end of the piston push rod 4 is fixedly connected to the output end of the locking cylinder 3.

[0038] The present invention also includes that the base of the locking cylinder 3 is rotatably connected to the cylinder mounting seat 2 via the first pin 1, and the cylinder mounting seat 2 is fixedly connected to one side of the forklift beam via a bolt group.

[0039] In use, the locking cylinder 3 outputs a smooth thrust through the piston rod 4, and with the hinge design of the second pin 5, the linear motion is efficiently converted into the rotational motion of the locking rod 7.

[0040] In use, the forklift suspension locking device drives the piston push rod 4 to extend and retract through the locking cylinder 3, causing the locking rod 7 to rotate around the third pin 6, thereby locking and unlocking the suspension system. When the locking rod 7 rotates to a vertical position, it presses against the upper pressure plate above the middle of the suspension leaf spring, locking the suspension leaf spring. Multiple insert plates 11 on the side of the locking rod 7 are inserted into the corresponding slots 12 of the limiting seat 13 to form a multi-point rigid connection, dispersing the upward thrust of the suspension leaf spring to multiple contact points and preventing the third pin 6 from bearing concentrated stress. The lower end of the locking rod 7 is fixed to the pressure plate 8 by the connecting block 14 inserted through the groove 17. Multiple pulleys 9 on the pressure plate 8 roll in contact with the suspension leaf spring, converting sliding friction into rolling friction, reducing frictional resistance and abnormal noise during the dynamic locking process.

[0041] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The descriptions of the above embodiments and specifications are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of protection claimed by this utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A forklift suspension locking device, comprising a locking rod (7) and a limiting seat (13), characterized in that, A plug plate (11) is fixedly connected to one side of the locking rod (7). The plug plate (11) is provided in multiple pieces. A slot (12) is provided on one side of the limiting seat (13). The slot (12) is provided in multiple places. The multiple slots (12) are used for the plug plate (11) to be installed and inserted. One end of the locking rod (7) is provided with a groove (17) for the insertion of the connecting block (14). One end of the connecting block (14) is fixedly connected to one side of the pressure plate (8). A pulley (9) is rotatably installed on the other side of the pressure plate (8). Multiple pulleys (9) are provided.

2. The forklift suspension locking device according to claim 1, characterized in that, A magnetic plate (10) is provided on one side of the locking rod (7), and the magnetic plate (10) is magnetically connected to the limiting seat (13).

3. The forklift suspension locking device according to claim 1, characterized in that, The connecting block (14) has a first threaded hole (15) inside, and the locking rod (7) has a second threaded hole (16) on one side. The first threaded hole (15) and the second threaded hole (16) are compatible and are both used for screwing in bolts.

4. A forklift suspension locking device according to claim 1, characterized in that, The locking rod (7) is rotatably connected to the forklift beam via the third pin (6), and the limiting seat (13) is fixedly connected to one side of the forklift beam via a bolt group.

5. A forklift suspension locking device according to claim 1, characterized in that, The locking rod (7) is rotatably connected to one end of the piston push rod (4) via the second pin (5) at one end away from the pressure plate (8), and the other end of the piston push rod (4) is fixedly connected to the output end of the locking cylinder (3).

6. A forklift suspension locking device according to claim 5, characterized in that, The base of the locking cylinder (3) is rotatably connected to the cylinder mounting seat (2) via the first pin (1), and the cylinder mounting seat (2) is fixedly connected to one side of the forklift beam via a bolt group.

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