A logistics forklift truck

Abstract

The application discloses a logistics forklift, which comprises a vehicle body and a fork frame, and anti-toppling mechanisms are arranged on both sides of the fork frame, wherein each anti-toppling mechanism comprises a lifting rod, a lifting mechanism for driving the lifting rod to lift, a connecting rod fixed on the lifting rod, and a first clamping assembly in sliding connection with the connecting rod; the connecting rod is parallel to the fork frame; the first clamping assembly comprises X-axis clamping blocks and Z-axis clamping blocks; the lifting rod is an electric telescopic rod; the connecting rod is in sliding connection with a second clamping assembly; the second clamping assembly comprises Y-axis clamping blocks; a transmission shaft is rotatably connected in the Z-axis clamping block; a first roller and a wire reel are fixed on the transmission shaft; a pull rope is arranged between the wire reel and the second clamping assembly; the Z-axis clamping blocks are lowered and jointly act on horizontal parts of the fork frame to clamp long express mails in the vertical direction; the two X-axis clamping blocks are moved to the opposite direction to clamp small express mails on the upper side from the left and right sides; and the Y-axis clamping blocks are tightly attached to the front side of the goods to prevent the express mails from sliding forward.

Description

Technical Field

[0001] This invention relates to the field of logistics technology, specifically to a logistics forklift. Background Technology

[0002] Forklifts are vehicles used to move goods. In the logistics industry, packages are typically placed on pallets and moved using forklifts. During forklift operation, uneven surfaces, sharp turns, or sudden braking can all cause packages to slip.

[0003] In the prior art, for example, patent application number CN202011314894.3 discloses a logistics forklift that can stably insert heavy objects. It clamps the goods by moving two clamping plates to opposite sides to prevent the express delivery from slipping.

[0004] However, for some special-sized packages, such as electric pianos, which are longer and shorter, they are often placed at the bottom to accommodate multiple packages at once, with smaller packages stacked on top. While longer packages increase the floor space of the upper stack, in practice, the total length of the upper stack should not exceed the width of the pallet; otherwise, it may bend the packages below.

[0005] In existing technology, the two clamping plates need to move a sufficient distance to both sides to clamp these long packages. However, after clamping the larger packages at the bottom, the smaller packages at the top cannot be clamped, and they are still prone to falling off during handling. Summary of the Invention

[0006] In order to solve at least one of the technical problems mentioned in the background art, the present invention aims to provide a logistics forklift that solves the problem that the upper layer of express delivery cannot be clamped and that the upper layer of express delivery is easy to fall off during the handling process.

[0007] To achieve the above objectives, the present invention provides the following technical solution: A logistics forklift includes a vehicle body and a fork carriage. Anti-tipping mechanisms are provided on both sides of the fork carriage. Each anti-tipping mechanism includes a lifting rod, a lifting mechanism for driving the lifting rod to rise and fall, a connecting rod fixed to the lifting rod, and a first clamping assembly slidably connected to the connecting rod. The connecting rod is parallel to the fork carriage. The first clamping assembly includes an X-axis clamping block and a Z-axis clamping block. The lifting rod is an electrically telescopic rod that extends and retracts along the X-axis direction. The connecting rod is fixed to the output end of the electrically telescopic rod. The connecting rod is slidably connected to a second clamping assembly, which is located on the side of the first clamping assembly away from the vehicle body. The second clamping assembly includes a Y-axis clamping block and a drive shaft rotatably connected inside the Z-axis clamping block. A first roller and a spool are fixed on the drive shaft, and a pull rope is provided between the spool and the second clamping assembly. When the Z-axis clamping block descends vertically to contact the cargo, the first roller contacts the top of the cargo. When the cargo moves forward, the first roller and the spool rotate clockwise, and the pull rope is wound around the spool.

[0008] Compared with the prior art, the beneficial effects of the present invention are: The Z-axis clamping block descends and works in conjunction with the horizontal part of the forklift to clamp longer packages vertically. The two X-axis clamping blocks move in opposite directions to clamp shorter packages on the upper side from the left and right sides. If the lower package slides forward, it drives the first roller to rotate. The first roller drives the spool to rotate through the drive shaft, winding the pull rope around the spool, thereby pulling the second clamping assembly closer to the forklift. This makes the Y-axis clamping block stick tightly to the front of the goods, preventing the package from slipping forward.

[0009] Preferably, a camshaft is rotatably connected inside the Y-axis clamping block, and a second roller is fixed on the camshaft. A torsion spring is provided between the second roller and the Y-axis clamping block. When the Y-axis clamping block moves towards the side closer to the vehicle body and comes into contact with the cargo, the second roller comes into contact with the front side of the cargo.

[0010] Preferably, a cam is fixed on the camshaft, and an arc-shaped piece is fixed inside the Y-axis clamping block; the cam is provided with a first contact point away from the vehicle body and a second contact point close to the vehicle body, and the arc-shaped piece is provided with a third contact point away from the vehicle body and a fourth contact point close to the vehicle body; the lifting mechanism is electrically connected to a PLC; the first contact point and the third contact point constitute a first switch, and the first switch is connected to the PLC through a wire; the second contact point and the fourth contact point constitute a second switch, and the second switch is connected to the PLC through a wire. When one side of the cargo tilts downwards and the other side tilts upwards, the two second rollers rotate in different directions. The second and fourth contacts on the side of the cargo tilting downwards come into contact, and the PLC controls the lifting mechanism on the tilting side to raise the lifting rod. The first and third contacts on the side of the cargo tilting upwards come into contact, and the PLC controls the lifting mechanism on the tilting side to lower the lifting rod.

[0011] Preferably, the second clamping assembly further includes a second slider slidably connected to the connecting rod, and the second slider is rotatably connected to a second electric wheel for driving the second slider to slide on the connecting rod.

[0012] Preferably, a screw is threadedly connected to the second slider, a limit rod is slidably connected to the second slider, the Y-axis clamping block is fixed to the bottom end of the screw and the limit rod, and a motor for driving the screw to rotate is fixed inside the Y-axis clamping block.

[0013] Preferably, the first clamping assembly further includes a first slider, which is rotatably connected to a first electric wheel for driving the first slider to slide on the connecting rod.

[0014] Preferably, the X-axis clamping block is fixed to the side of the first slider near the fork, and the Z-axis clamping block is fixed to the lower side of the first slider.

[0015] Preferably, the lifting rod is an electric telescopic rod, and the connecting rod is fixed to the output end of the electric telescopic rod.

[0016] Preferably, the lifting mechanism is an electric slide or an electric push rod.

[0017] Preferably, the X-axis clamping block, Y-axis clamping block and Z-axis clamping block are all provided with pads on the side closest to the cargo. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the anti-tipping mechanism of the present invention; Figure 3 This is a schematic diagram of the anti-tipping mechanism of the present invention from another perspective; Figure 4 This is a cross-sectional view of the anti-tipping mechanism of the present invention; Figure 5 for Figure 4 Enlarged view of section “A”; In the picture: 1. Vehicle body; 2. Fork; 3. Anti-tipping mechanism; 31. Lifting mechanism; 32. Lifting rod; 33. Connecting rod; 34. First clamping assembly; 340. Drive shaft; 341. First slider; 3411. First electric wheel; 342. X-axis clamping block; 343. Z-axis clamping block; 344. First roller; 345. Shim; 346. Spool; 35. Second clamping assembly; 350. Camshaft; 351. Second slider; 3511. Second electric wheel; 352. Screw; 3521. Motor; 353. Limiting rod; 354. Y-axis clamping block; 355. Second roller; 357. Cam; 3571. First contact; 3572. Second contact; 358. Arc-shaped piece; 3581. Third contact; 3582. Fourth contact; 36. Pull rope. Detailed Implementation

[0019] The technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] Please see Figure 1 This embodiment provides a logistics forklift, including a vehicle body 1 and a fork carriage 2, which is used to lift logistics pallets.

[0021] During a single forklift operation, packages of different sizes and shapes are stacked on a logistics pallet. Larger packages are usually placed on the bottom layer. If the bottom layer tip over, the packages on top will also fall. Therefore, it is necessary to strengthen the stability of the packages on the bottom layer.

[0022] In this embodiment, to enhance the stability of the lower-level express delivery, please refer to... Figures 1-3 The fork 2 is provided with anti-tipping mechanisms 3 on both sides (the two anti-tipping mechanisms 3 are symmetrically arranged). The anti-tipping mechanism 3 includes a lifting rod 32, a lifting mechanism 31 for driving the lifting rod 32 to rise and fall, a connecting rod 33 fixed on the lifting rod 32, a first clamping assembly 34 slidably connected to the connecting rod 33, and a second clamping assembly 35 slidably connected to the connecting rod 33.

[0023] The lifting rod 32 extends and retracts in the X-axis direction (towards / away from the fork 2), and the lifting rod 32 is an electrically operated telescopic rod. The connecting rod 33 is fixed to the output end of the electrically operated telescopic rod. The lifting mechanism 31 is an electrically operated slide or an electrically operated push rod. If the lifting mechanism 31 is an electrically operated slide, the slide extends vertically and drives the lifting rod 32 to rise and fall. If the lifting mechanism 31 is an electrically operated push rod, the lifting rod 32 is fixed to the output end of the push rod. The connecting rod 33 is parallel to the fork 2.

[0024] Please see Figures 2-4 The first clamping assembly 34 includes a first slider 341 slidably connected to the connecting rod 33, an X-axis clamping block 342 fixed on the first slider 341, and a Z-axis clamping block 343 fixed on the first slider 341. The first slider 341 is rotatably connected to a first electric wheel 3411 for driving the first slider 341 to slide on the connecting rod 33 (it is worth noting that the first slider 341 can only move under the drive of the first electric wheel 3411). The X-axis clamping block 342 is fixed on the side of the first slider 341 near the fork 2, and the Z-axis clamping block 343 is fixed on the lower side of the first slider 341. The working surfaces (the surfaces in contact with the express) of the X-axis clamping block 342 and the Z-axis clamping block 343 are perpendicular to each other, and the working surface of the Z-axis clamping block 343 is horizontal.

[0025] The lifting mechanism 31 drives the lifting rod 32 to rise and fall, causing the working surface of the Z-axis clamping block 343 to abut against the top surface of the longer express package on the lower layer. The longer express package is clamped by the Z-axis clamping block 343 and the horizontal section of the fork 2. Then, by shortening the two lifting rods 32 (electric telescopic rods), the two X-axis clamping blocks 342 clamp the express package on the upper layer from both sides.

[0026] Although the lower, longer packages are clamped vertically and the upper packages are clamped from both sides, the packages generate forward inertial force when the forklift brakes, causing them to tip forward. To overcome this inertial force, this embodiment includes a second clamping assembly 35, located on the side of the first clamping assembly 34 away from the vehicle body 1. The specific structure of the second clamping assembly 35 is as follows: Please see Figures 2-4 The second clamping assembly 35 includes a second slider 351 slidably connected to the connecting rod 33, a screw 352 threadedly connected to the second slider 351, a limiting rod 353 slidably connected to the second slider 351, and a Y-axis clamping block 354 fixed to the bottom ends of the screw 352 and the limiting rod 353. A second electric wheel 3511 for driving the second slider 351 to slide on the connecting rod 33 is rotatably connected inside the second slider 351. A motor 3521 for driving the screw 352 to rotate is fixed inside the Y-axis clamping block 354. The motor 3521 drives the screw 352 to rotate forward and backward. The screw 352 is threadedly connected to the second slider 351, realizing the lifting and lowering of the Y-axis clamping block 354. It is worth noting that the screw 352 and the limiting rod 353 are axially parallel. This lifting and lowering is to prevent the Y-axis clamping block 354 from obstructing loading and unloading, thus preventing difficulties in loading and unloading.

[0027] To further explain, a drive shaft 340 is rotatably connected inside the Z-axis clamping block 343. A first roller 344 and a reel 346 are fixedly mounted on the drive shaft 340. A pull rope 36 is provided between the reel 346 and the second clamping assembly 35 (the first clamping assembly 34 cannot be moved by the pull rope 36). When the Z-axis clamping block 343 descends vertically to contact the goods, the first roller 344 contacts the top of the lower layer of express delivery. If the lower layer of express delivery moves forward, it will cause the first roller 344 to rotate. The first roller 344 drives the reel 346 to rotate via the drive shaft 340, winding the pull rope 36 around the reel 346. 6. Pull the second clamping assembly 35 towards the side closer to the package, so that the Y-axis clamping block 354 is against the front of the package to prevent it from tipping forward. It is worth noting that before the forklift carrying the package moves, the position of the Z-axis clamping block 343 needs to be adjusted by the second electric wheel 3511. The Z-axis clamping block 343 should have a gap of no more than 2 cm between it and the front of the package. After adjusting the position of the Z-axis clamping block 343, rotate the first roller 344 to tension the pull rope 36, but not enough to pull the Z-axis clamping block 343 towards the package. Then raise and lower the Z-axis clamping block 343 to bring the first roller 344 against the top of the package.

[0028] Please see Figure 4 and Figure 5 In this embodiment, a camshaft 350 is rotatably connected inside the Y-axis clamping block 354. A second roller 355 is fixedly mounted on the camshaft 350. A torsion spring is provided between the second roller 355 and the Y-axis clamping block 354 (this torsion spring can reduce the tendency of the express to tilt to the left or right). When the Y-axis clamping block 354 moves towards the side closer to the vehicle body 1 and comes into contact with the cargo, the second roller 355 comes into contact with the front side of the cargo. A cam 357 is fixedly mounted on the camshaft 350, and an arc-shaped cam is fixedly mounted inside the Y-axis clamping block 354. Plate 358; the cam 357 is provided with a first contact 3571 away from the vehicle body 1 and a second contact 3572 close to the vehicle body 1, the arc plate 358 is provided with a third contact 3581 away from the vehicle body 1 and a fourth contact 3582 close to the vehicle body 1, the lifting mechanism 31 is electrically connected to a PLC, the first contact 3571 and the third contact 3581 constitute a first switch, the first switch is connected to the PLC through a wire, the second contact 3572 and the fourth contact 3582 constitute a second switch, the second switch is connected to the PLC through a wire; When one side of the goods tilts downward and the other side tilts upward, the two second rollers 355 rotate in different directions. The second contact 3572 and the fourth contact 3582 on the side of the goods tilting downward abut (the second switch is closed). The PLC controls the lifting mechanism 31 on the tilting side to drive the lifting rod 32 to rise. The first contact 3571 and the third contact 3581 on the side of the goods tilting upward abut (the first switch is closed). The PLC controls the lifting mechanism 31 on the tilting side to drive the lifting rod 32 to fall, pressing down the tilting side and leaving some space to prevent the express delivery from being bent.

[0029] Please see Figures 2-5 In this embodiment, in order to increase the friction between the X-axis clamping block 342, the Y-axis clamping block 354, the Z-axis clamping block 343 and the express delivery, a gasket 345 is provided on the side of the X-axis clamping block 342, the Y-axis clamping block 354 and the Z-axis clamping block 343 near the goods. The material of the gasket 345 is silicone or rubber.

[0030] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within the present invention.

Claims

1. A logistics forklift, comprising a chassis (1) and forks (2), characterized in that, Both sides of the fork (2) are provided with anti-tipping mechanisms (3). The anti-tipping mechanism (3) includes a lifting rod (32), a lifting mechanism (31) for driving the lifting rod (32) to rise and fall, a connecting rod (33) fixed on the lifting rod (32), and a first clamping assembly (34) slidably connected to the connecting rod (33). The connecting rod (33) is parallel to the fork (2). The first clamping assembly (34) includes an X-axis clamping block (342) and a Z-axis clamping block (343). The lifting rod (32) is an electric telescopic rod. The electric telescopic rod extends and retracts along the X-axis direction. The connecting rod (33) is fixed at the output end of the electric telescopic rod. The connecting rod (33) is slidably connected to a second clamping assembly (35). The second clamping assembly (35) is located on the side of the first clamping assembly (34) away from the vehicle body (1). The second clamping assembly (35) includes a Y-axis clamping block (354) and a drive shaft (340) is rotatably connected inside the Z-axis clamping block (343). A first roller (344) and a spool (346) are fixed on the drive shaft (340). A pull rope (36) is provided between the spool (346) and the second clamping assembly (35). When the Z-axis clamping block (343) descends vertically to contact the cargo, the first roller (344) contacts the top of the cargo. When the cargo moves forward, the first roller (344) and the spool (346) rotate clockwise, and the pull rope (36) is wound around the spool (346).

2. A logistics forklift according to claim 1, characterized in that, A camshaft (350) is rotatably connected inside the Y-axis clamping block (354). A second roller (355) is fixed on the camshaft (350). A torsion spring is provided between the second roller (355) and the Y-axis clamping block (354). When the Y-axis clamping block (354) moves to the side closer to the vehicle body (1) and comes into contact with the cargo, the second roller (355) comes into contact with the front side of the cargo.

3. A logistics forklift according to claim 2, characterized in that, A cam (357) is fixed on the camshaft (350), and an arc-shaped piece (358) is fixed inside the Y-axis clamping block (354). The cam (357) has a first contact (3571) away from the vehicle body (1) and a second contact (3572) close to the vehicle body (1). The arc-shaped piece (358) has a third contact (3581) away from the vehicle body (1) and a fourth contact (3582) close to the vehicle body (1). The lifting mechanism (31) is electrically connected to a PLC. The first contact (3571) and the third contact (3581) constitute a first switch. The first switch is connected to the PLC through a wire. The second contact (3572) and the fourth contact (3582) constitute a second switch. The second switch is connected to the PLC through a wire. When one side of the cargo tilts downward and the other side tilts upward, the two second rollers (355) rotate in different directions. The second contact (3572) and the fourth contact (3582) on the side of the cargo tilting downward come into contact. The PLC controls the lifting mechanism (31) on the tilting side to drive the lifting rod (32) to rise. The first contact (3571) and the third contact (3581) on the side of the cargo tilting upward come into contact. The PLC controls the lifting mechanism (31) on the tilting side to drive the lifting rod (32) to fall.

4. A logistics forklift according to claim 1, characterized in that, The second clamping assembly (35) further includes a second slider (351) slidably connected to the connecting rod (33), and the second slider (351) is rotatably connected to a second electric wheel (3511) for driving the second slider (351) to slide on the connecting rod (33).

5. A logistics forklift according to claim 4, characterized in that, The second slider (351) is threaded with a screw (352), and a limit rod (353) is slidably connected to the second slider (351). The Y-axis clamping block (354) is fixed at the bottom end of the screw (352) and the limit rod (353). A motor (3521) for driving the screw (352) to rotate is fixed inside the Y-axis clamping block (354).

6. A logistics forklift according to claim 1, characterized in that, The first clamping assembly (34) further includes a first slider (341), which is rotatably connected to a first electric wheel (3411) for driving the first slider (341) to slide on the connecting rod (33).

7. A logistics forklift according to claim 6, characterized in that, The X-axis clamping block (342) is fixed on the side of the first slider (341) near the fork (2), and the Z-axis clamping block (343) is fixed on the lower side of the first slider (341).

8. A logistics forklift according to claim 1, characterized in that, The lifting mechanism (31) is an electric slide or an electric push rod.

9. A logistics forklift according to claim 1, characterized in that, The X-axis clamping block (342), Y-axis clamping block (354) and Z-axis clamping block (343) are all provided with pads (345) on the side near the cargo.

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