Automatic quick change device for a forklift truck accessory latch

Abstract

The utility model relates to engineering machinery technical field discloses a fork truck accessory latch automatic quick change device, including the connecting plate, the bottom fixed connection of connecting plate has the square box no.

Description

Technical Field

[0001] This utility model relates to the field of engineering machinery technology, and in particular to an automatic quick-change device for forklift attachment pins. Background Technology

[0002] Forklift attachment pins are cylindrical or irregularly shaped metal components installed at the connection point between forklift attachments and the main equipment to achieve quick fixing and separation of the two. They are usually made of high-strength steel and have specific diameters, lengths, and end structures. By inserting them into corresponding pin holes and cooperating with locking mechanisms, they ensure the stability of the connection between the attachment and the forklift. They are the core components connecting the forklift body and various attachments and are widely used in logistics, construction, ports, and other fields, adapting to the attachment replacement and safe operation requirements in different operating scenarios.

[0003] The hydraulic drive or mechanical transmission mechanism moves the pin axially, allowing it to insert into or pull out of the pin hole at the connection point between the attachment and the forklift. With the help of the locking assembly, it achieves mechanical locking after insertion, ensuring a secure connection between the attachment and the main equipment. When the attachment needs to be replaced, the pin is unlocked and retracted, thus completing the fixing and separation of the attachment and enabling quick switching between different working attachments.

[0004] In existing technologies, changing attachments requires manual insertion and removal of pins, which is not only time-consuming, but also significantly slows down the work pace, especially in scenarios with frequent changes. It also increases the physical exertion and labor intensity of operators. Furthermore, manual operation is prone to uneven force and misalignment, which can lead to improper installation or insecure locking of the pins, posing a safety hazard of loose or even detached attachments. Therefore, an automatic quick-change device for forklift attachment pins is proposed to solve the above problems. Utility Model Content

[0005] To overcome the above shortcomings, this utility model provides an automatic quick-change device for forklift attachment pins, aiming to improve the problems of excessive time consumption, impact on continuity, and high labor intensity in the existing technology.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] An automatic quick-change device for forklift attachment pins includes a connecting plate. A square box is fixedly connected to the bottom end of the connecting plate. A fixing rod is fixedly connected to the inner wall of the square box. A hydraulic cylinder is rotatably connected to the outer wall of the fixing rod. A fixing block is fixedly connected to the drive end of the hydraulic cylinder. A transmission rod is rotatably connected to the outer wall of the fixing block. A fixing rod is fixedly connected to the inner wall of the square box. A connecting rod is rotatably connected to the outer wall of the fixing rod. Connecting rods are rotatably connected to the outer sides of both ends of the connecting rod. A pin shaft is rotatably connected to the outer wall of the other end of the two connecting rods. Fixing components for fixing are installed at both ends of the outer wall of the connecting plate.

[0008] As a further description of the above technical solution:

[0009] The fixing assembly includes two square boxes, each with a cylinder fixedly connected to its inner wall, a wedge fixedly connected to the drive end of each cylinder, two guide rods fixedly connected to the inner wall of each square box, a sliding block slidably connected to the outer wall of each guide rod, a fixing block fixedly connected to the bottom inner wall of each square box, a fixing plate fixedly connected to the top of each sliding block, and springs sleeved on the outer walls of the two guide rods.

[0010] As a further description of the above technical solution:

[0011] A mounting plate is slidably connected to the outer wall of the connecting plate, and a fork is fixedly connected to the front end of the mounting plate;

[0012] As a further description of the above technical solution:

[0013] The top end of the second fixed block contacts the outer wall of the pin shaft, and the top end of the sliding block contacts the outer wall of the pin shaft.

[0014] As a further description of the above technical solution:

[0015] The outer wall of the sliding block is slidably connected to the inner wall of the square box II, and the outer wall of the inclined block is in contact with the inner wall of the fixed plate;

[0016] As a further description of the above technical solution:

[0017] The outer wall of the inclined block is slidably connected to the inner wall of the square box 2, and the outer wall of the fixing plate is slidably connected to the inner wall of the square box 2.

[0018] As a further description of the above technical solution:

[0019] One end of the spring is fixedly connected to the inner wall of the square box 2, and the other end of the spring is fixedly connected to the top of the sliding block;

[0020] As a further description of the above technical solution:

[0021] The outer walls of the two pin shafts are slidably connected to the inner wall of the second square box, and the outer walls of the two pin shafts are slidably connected to the inner wall of the first square box.

[0022] This utility model has the following beneficial effects:

[0023] 1. In this utility model, the hydraulic cylinder is activated, and its driving end pushes the fixed block one to move, which drives the transmission rod to rotate. The transmission rod pulls the connecting rod one to rotate around the fixed rod two, thereby causing the connecting rod two at both ends to move, driving the pin shaft to extend or retract, realizing the quick insertion and removal of forklift attachments. The entire process is completed efficiently by hydraulic power and linkage transmission, which can significantly shorten the attachment replacement time. There is no need for manual insertion and removal of the pin, reducing manpower input and operation intensity. It is especially suitable for operation scenarios where attachments are frequently changed. At the same time, the pin movement is precisely controlled by mechanical or electronic control components, which can avoid problems such as incomplete insertion and insecure locking that may occur during manual operation, improve connection safety, and reduce the risk of attachment falling off.

[0024] 2. In this utility model, the starting cylinder drives the inclined block to move. The inclined surface of the inclined block causes the sliding fixed plate to slide along the guide rod, compressing the spring and clamping and fixing the component. When the cylinder moves in the reverse direction, the spring rebounds, the fixed plate resets and loosens, completing the quick fixing and disassembly. This ensures that the pin shaft is stably kept in the locked position during operation, avoiding loosening or displacement of the pin shaft due to vibration, impact and other environmental factors. This ensures the stability of the connection between the attachment and the forklift, reduces the safety risk of attachment falling off during operation, and reduces attachment replacement failures caused by accidental movement of the pin shaft. It also improves the reliability of equipment operation and adapts to the needs of high-intensity and high-frequency operation scenarios. Attached Figure Description

[0025] Figure 1 This is a three-dimensional schematic diagram of an automatic quick-change device for forklift attachment pins proposed in this utility model.

[0026] Figure 2 This is a schematic diagram of the mounting plate of an automatic quick-change device for forklift attachment pins proposed in this utility model.

[0027] Figure 3 This is a structural schematic diagram of a square box for an automatic quick-change device for forklift attachment pins proposed in this utility model.

[0028] Figure 4 This is a schematic diagram of the square box 2, which is an automatic quick-change device for forklift attachment pins proposed in this utility model.

[0029] Legend:

[0030] 1. Connecting plate; 2. Square box one; 3. Fixing rod one; 4. Hydraulic cylinder; 5. Fixing block one; 6. Transmission rod; 7. Fixing rod two; 8. Connecting rod one; 9. Connecting rod two; 10. Pin shaft; 11. Square box two; 12. Cylinder; 13. Inclined block; 14. Guide rod; 15. Sliding block; 16. Fixing block two; 17. Fixing plate; 18. Spring; 19. Mounting plate; 20. Forks. Detailed Implementation

[0031] 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.

[0032] Reference Figures 1 to 3 This utility model provides an embodiment of an automatic quick-change device for forklift attachments, including a connecting plate 1. The connecting plate 1 serves as the connection hub between the entire automatic quick-change device and the forklift. A square box 2 is fixedly connected to the bottom end of the connecting plate 1. The square box 2 provides a stable installation space and protective shell for the internal transmission mechanism, ensuring that the power of the forklift can be stably transmitted to the components inside the square box 2. A fixing rod 3 is fixedly connected to the inner wall of the square box 2. The fixing rod 3 provides a rotation fulcrum for the hydraulic cylinder 4. Securely installed inside square box 2, a hydraulic cylinder 4 is rotatably connected to the outer wall of fixed rod 3. The hydraulic cylinder 4 is rotatably connected to the outer wall of fixed rod 3 and generates driving force through its own extension and retraction. A fixed block 5 is fixedly connected to the driving end of hydraulic cylinder 4. The extension and retraction of hydraulic cylinder 4 is converted into linear movement of fixed block 5. A transmission rod 6 is rotatably connected to the outer wall of fixed block 5. When fixed block 5 is driven to move linearly by hydraulic cylinder 4, it drives transmission rod 6 to swing.

[0033] A fixing rod 7 is fixedly connected to the inner wall of the square box 2. The fixing rod 7 fixed to the inner wall of the square box 2 cooperates with the fixing rod 3 to provide a rotation support point for the connecting rod 8. The connecting rod 8 is rotatably connected to the outer wall of the fixing rod 7. The connecting rod 8 is rotatably connected to the outer wall of the fixing rod 7. Under the pull of the transmission rod 6, it rotates around the fixing rod 7. The outer sides of both ends of the connecting rod 8 are rotatably connected to the connecting rod 9. When the connecting rod 8 rotates, it drives the connecting rod 9 to swing. The outer walls of the other ends of the two connecting rods 9 are rotatably connected to the pin shaft 10. The pin shaft 10 is extended or retracted under the drive of the connecting rod 9. The two ends of the outer wall of the connecting plate 1 are equipped with fixing components for fixing. The fixing components installed at both ends of the outer wall of the connecting plate 1 are used to firmly fix the entire automatic quick change device on the forklift.

[0034] Reference Figures 2 to 4 The fixing component includes two square boxes 11, which serve as the basic frame of the fixing component. Cylinders 12 are fixedly connected to the inner walls of both square boxes 11. The cylinders 12 are fixedly fixed to the inner walls of the square boxes 11 to provide a stable installation environment for the cylinders 12. The drive ends of the two cylinders 12 are fixedly connected to inclined blocks 13. When the cylinders 12 are started, the drive ends push the inclined blocks 13 to make linear motion, converting the horizontal thrust of the cylinders 12 into a vertical component force, providing a power conversion mechanism for the movement of the sliding block 15. Two guide rods 14 are fixedly connected to the inner walls of the square boxes 11. The two guide rods 14 are fixed to the inner walls of the square boxes 11 by interference fit or key connection to ensure that the axes of the guide rods 14 are parallel and have high positional accuracy.

[0035] Both guide rods 14 have sliding blocks 15 slidably connected to their outer walls. The sliding blocks 15 are slidably connected to the guide rods 14 via linear bearings or copper sleeves. The clearance between the blocks is controlled at the micrometer level to ensure smooth sliding without jamming. A fixing block 16 is fixedly connected to the bottom inner wall of the square box 11. The fixing block 16 is fixed to the bottom inner wall of the square box 11 and serves as the support base for the entire fixing assembly. A fixing plate 17 is fixedly connected to the top of the sliding block 15. When the sliding block 15 slides on the guide rod 14, it drives the fixing plate 17 to move synchronously, realizing the clamping or releasing operation of the forklift. Springs 18 are sleeved on the outer walls of the two guide rods 14 to ensure that sufficient elastic potential energy can be stored during compression.

[0036] Reference Figures 2 to 4A mounting plate 19 is slidably connected to the outer wall of the connecting plate 1. The outer wall of the connecting plate 1 is slidably connected to the mounting plate 19 through a sliding groove. A fork 20 is fixedly connected to the front end of the mounting plate 19, thus securely mounting the fork 20 onto the mounting plate 19 to form a structure for carrying goods. This allows the fork 20 to slide and adjust its position on the connecting plate 1 as the mounting plate 19 slides. The top end of the fixing block 16 contacts the outer wall of the pin shaft 10, providing a fixing function during the movement of the pin shaft 10 and preventing excessive movement of the pin shaft 10. The top end of the sliding block 15 is also connected to the pin shaft 10. The outer wall of the sliding block 15 contacts the outer wall of the pin shaft 10. When the fixing component is activated, the sliding block 15 is fixed to the fixing block 16 through contact with the pin shaft 10. The outer wall of the sliding block 15 is slidably connected to the inner wall of the square box 11. The outer wall of the sliding block 15 slides on the inner wall of the square box 11. The square box 11 provides a sliding track and limiting space for the sliding block 15. The outer wall of the inclined block 13 contacts the inner wall of the fixing plate 17. When the inclined block 13 moves, it pushes the fixing plate 17 with the inclined surface, converting the thrust of the cylinder 12 into the clamping force of the fixing plate 17, thereby fixing the attachment.

[0037] The outer wall of the inclined block 13 is slidably connected to the inner wall of the square box 11. The outer wall of the inclined block 13 slides on the inner wall of the square box 11, which restricts the movement trajectory of the inclined block 13 and ensures that the inclined block 13 moves in a straight line. The outer wall of the fixing plate 17 is slidably connected to the inner wall of the square box 11, which provides sliding guidance and support for the fixing plate 17. One end of the spring 18 is fixedly connected to the inner wall of the square box 11, and the other end is fixedly connected to the top of the sliding block 15. The inner wall of square box 11 is connected to the other end, and the top of sliding block 15 is connected to the other end. When sliding block 15 moves, it is compressed and stored. After the cylinder 12 releases the force, the spring 18 releases the elastic potential energy to push sliding block 15 to reset. The outer walls of the two pin shafts 10 are slidably connected to the inner wall of square box 11 and the outer walls of the two pin shafts 10 are slidably connected to the inner wall of square box 2. The outer walls of the pin shafts 10 slide on the inner walls of square box 11 and square box 2. The two boxes together provide sliding guidance and limit for the pin shafts 10, ensuring that the insertion and removal of the pin shafts 10 is accurate and enabling quick replacement of attachments.

[0038] Working principle: When it is necessary to change the forklift attachment, the hydraulic cylinder 4 in the square box 2 is activated. It rotates around the fixed rod 3 as the fulcrum, and the drive end pushes the fixed block 5 to move, which drives the transmission rod 6 to swing. The transmission rod 6 pulls the connecting rod 8 to rotate around the fixed rod 7. The connecting rods 9 at both ends of the connecting rod 8 move accordingly, which drives the pin shaft 10 to extend or retract, realizing the quick insertion and removal of the forklift attachment connection hole. Through the synergistic effect of hydraulic power and linkage mechanism, the attachment replacement is completed quickly and stably, improving the work efficiency and realizing the quick insertion and removal of forklift attachments. The whole process is completed efficiently by relying on hydraulic power and linkage transmission, which can significantly shorten the attachment replacement time. There is no need to manually insert and remove the pin, reducing the labor input and operation intensity, which is especially suitable for operation scenarios where attachments are frequently changed.

[0039] When the fixing assembly is activated, the cylinders 12 inside the two square boxes 11 operate, and their driving ends push the inclined blocks 13 forward. Utilizing the inclined surface structure of the inclined blocks 13, and the sliding grooves opened inside the fixing plate 17, the sliding block 15 slides downward along the guide rod 14, while the spring 18 is stretched. When the cylinders 12 retract, the pressure of the inclined blocks 13 is lost, and the spring 18 releases its elastic potential energy, causing the fixing plate 17 and the sliding block 15 to reset upward along the guide rod 14, thus releasing the fixation of the attachment. Through the coordinated cooperation of the cylinder 12 drive, inclined surface transmission, spring 18 reset, and guide rod 14 limit, the fast fixing and loosening process of the forklift attachment is completed, ensuring the stability of the attachment during use and the convenience of replacement.

[0040] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. 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.

Claims

1. An automatic quick-change device for forklift attachment pins, comprising a connecting plate (1), characterized in that: The bottom end of the connecting plate (1) is fixedly connected to a square box (2). The inner wall of the square box (2) is fixedly connected to a fixing rod (3). The outer wall of the fixing rod (3) is rotatably connected to a hydraulic cylinder (4). The driving end of the hydraulic cylinder (4) is fixedly connected to a fixing block (5). The outer wall of the fixing block (5) is rotatably connected to a transmission rod (6). The inner wall of the square box (2) is fixedly connected to a fixing rod (7). The outer wall of the fixing rod (7) is rotatably connected to a connecting rod (8). Both ends of the connecting rod (8) are rotatably connected to connecting rods (9). The outer walls of the other ends of the two connecting rods (9) are rotatably connected to pin shafts (10). The two ends of the outer wall of the connecting plate (1) are equipped with fixing components for fixing.

2. The automatic quick-change device for forklift attachment pins according to claim 1, characterized in that: The fixing assembly includes two square boxes (11), each with a cylinder (12) fixedly connected to its inner wall, a wedge (13) fixedly connected to the driving end of each cylinder (12), two guide rods (14) fixedly connected to the inner wall of each square box (11), a sliding block (15) slidably connected to the outer wall of each guide rod (14), a fixing block (16) fixedly connected to the bottom inner wall of each square box (11), a fixing plate (17) fixedly connected to the top of each sliding block (15), and a spring (18) sleeved on the outer wall of each guide rod (14).

3. The automatic quick-change device for forklift attachment pins according to claim 1, characterized in that: The outer wall of the connecting plate (1) is slidably connected to the mounting plate (19), and the front end of the mounting plate (19) is fixedly connected to the fork (20).

4. The automatic quick-change device for forklift attachment pins according to claim 2, characterized in that: The top end of the fixed block (16) is in contact with the outer wall of the pin shaft (10), and the top end of the sliding block (15) is in contact with the outer wall of the pin shaft (10).

5. An automatic quick-change device for forklift attachment pins according to claim 2, characterized in that: The outer wall of the sliding block (15) is slidably connected to the inner wall of the square box (11), and the outer wall of the inclined block (13) is in contact with the inner wall of the fixing plate (17).

6. An automatic quick-change device for forklift attachment pins according to claim 2, characterized in that: The outer wall of the inclined block (13) is slidably connected to the inner wall of the square box two (11), and the outer wall of the fixing plate (17) is slidably connected to the inner wall of the square box two (11).

7. An automatic quick-change device for forklift attachment pins according to claim 2, characterized in that: One end of the spring (18) is fixedly connected to the inner wall of the square box (11), and the other end of the spring (18) is fixedly connected to the top of the sliding block (15).

8. An automatic quick-change device for forklift attachment pins according to claim 2, characterized in that: The outer walls of the two pin shafts (10) are slidably connected to the inner wall of the square box two (11), and the outer walls of the two pin shafts (10) are slidably connected to the inner wall of the square box one (2).

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