AGV forklift with buffering function

Abstract

The utility model discloses an AGV forklift with a buffering function, and relates to the technical field of AGV forklifts.The AGV forklift with the buffering function comprises a rack body, a lifting fork is movably connected to the upper portion of the rack body, a protective shell is fixedly connected to the end of the rack body, and an auxiliary escape device is movably connected to the bottom of the protective shell; the rack body comprises a U-shaped frame, two sets of connecting frames are arranged at the bottom of the frame in a rectangular array mode, the distance between the frame and the ground is increased, and the situation that a chassis makes contact with the ground during moving, and the chassis is supported is prevented; according to the utility model, the transmission shaft rod drives the turnover lifting frame to rotate, so that the horizontally placed turnover lifting frame rotates to a vertical state, the end part of the rack body is jacked up and is matched with the auxiliary rollers movably connected with the end part of the turnover lifting frame to move, and the universal moving wheels are quickly moved out of the pits; and the crossing ability of the AGV forklift is improved while the escape time is saved.

Description

Technical Field

[0001] The utility model specifically relates to the technical field of AGV forklifts, in particular to an AGV forklift with a buffer function. Background Art

[0002] AGV forklifts include pallet AGVs, wide-leg stacker AGVs, narrow stacker AGVs, and legless stacker AGVs. Used for the logistics turnover of palletized cargo, they consist of a hydraulic lifting system, differential drive system, PLC control system, guidance system, communication system, warning system, operating system, and power supply. They are programmable wireless dispatchable automated guided vehicles that integrate hydraulic lifting and PLC control.

[0003] However, in practice, people have noticed that due to the low base of the AGV forklift, the base is prone to being lifted up or stuck when going up or down slopes or passing through complex ground with many potholes, which makes the AGV forklift unable to continue moving. In addition, due to the small size of the universal wheel of the front steering, the universal wheel is easy to sink into the pothole when passing through the pothole, making the AGV forklift unable to move. Workers need to manually lift out the universal wheel. When loaded, the weight of the AGV forklift is too heavy to be lifted out by manual labor in a short time, which affects the normal use of the AGV forklift and also affects the efficiency of cargo transportation. Utility Model Content

[0004] The purpose of this utility model is to provide an AGV forklift with a buffer function. A flip-up bracket is installed on the side of the universal wheel. When the universal wheel falls into a pit, the front end of the AGV forklift can be lifted to help the universal wheel at the front end of the AGV forklift escape, thereby achieving automatic escape of the AGV forklift without the need for manual lifting. This solves the technical problems raised in the above-mentioned background technology.

[0005] To achieve the above objectives, the present invention provides the following technical solutions:

[0006] An AGV forklift with a buffering function comprises a frame body, a lifting fork is movably connected to the upper portion of the frame body, a protective shell is fixedly connected to the end of the frame body, and an auxiliary escape device is movably connected to the bottom of the protective shell;

[0007] The frame body includes a U-shaped frame, and the bottom of the frame is provided with two groups of connecting frames in a rectangular array to increase the distance between the frame and the ground and prevent the chassis from contacting the ground and bottoming out during movement. Each group of the connecting frames is provided with two, and each group of the connecting frames is movably connected with moving wheels.

[0008] Cylinder brackets are welded in a rectangular array in the frame, and each of the cylinder brackets is fixedly connected to a hydraulic cylinder. The hydraulic cylinder is located below the lifting fork, and the end of the hydraulic cylinder is fixedly connected to the lifting fork.

[0009] The frame is integrally provided with a steering bracket at one end away from the moving wheel, and the bottom of the steering bracket is fixedly connected to a universal moving wheel, which is located at the bottom of the protective shell;

[0010] A crossbeam fixedly connected to the end of the frame is also provided in the protective shell, and the auxiliary escape device is fixedly connected to the end of the frame through the crossbeam.

[0011] The auxiliary escape device includes a transmission shaft, both ends of which are integrally provided with limiting protrusions, and the limiting protrusions on each side are arranged in a ring array on the outside of the transmission shaft.

[0012] Both ends of the transmission shaft are provided with a flip lifting frame, and each of the flip lifting frames includes an inclined vertical frame, and a spline hole corresponding to the limiting protrusion is opened at the center of the inclined vertical frame;

[0013] The end of the transmission shaft passes through the inclined stand, and the spline hole is correspondingly inserted into the limiting protrusion.

[0014] Both ends of the inclined stand are inclined, and both ends of the inclined stand are integrally provided with symmetrical connecting lugs, and auxiliary rollers are movably connected between each group of connecting lugs.

[0015] Each of the flip lift frames is provided with support frames on both sides, and mounting bearings are embedded in the ends of the support frames, and the inner ring of the mounting bearings is interference fit with the transmission shaft;

[0016] The top of the support frame is fixedly connected to the crossbeam which is fixedly connected to the end of the frame by bolts, and a servo motor is fixedly connected to the middle position of the crossbeam.

[0017] The end of the servo motor is fixedly connected with a driving gear, and the transmission shaft is fixedly connected with a driven gear corresponding to the driving gear, and the driven gear and the driving gear are meshed with each other.

[0018] As a further technical solution of the present utility model, the described.

[0019] Compared with the prior art, the beneficial effects of the present invention are:

[0020] The AGV forklift can be used on roads with complex terrain by quickly moving the universal moving wheel out of the pit, saving time in getting out of trouble and improving the climbing ability of the AGV forklift, so that it can be used on roads with complex terrain; the bottom of the frame is provided with a downwardly extending connecting bracket, and the moving wheel is arranged between the two connecting brackets, so as to increase the ground clearance of the frame, prevent the frame from being lifted or stuck on uphill or downhill during movement, so that the AGV forklift can climb over most of the complex roads, thereby improving the climbing ability of the AGV forklift; the two ends of the drive shaft are provided with limiting protrusions corresponding to the spline holes, so that the drive shaft drives the flip lifting frame to flip, and symmetrical support frames are provided on both sides of each flip lifting frame to support the flip lifting frame, ensure the structural strength of the connection, increase the load-bearing capacity, and prevent damage during the escape process. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of the utility model in use state.

[0022] Figure 2 This utility model Figure 1 Schematic diagram of the bottom structure.

[0023] Figure 3 This utility model Figure 2 A partial enlarged schematic diagram.

[0024] Figure 4 This utility model Figure 2 A partial enlarged schematic diagram.

[0025] Figure 5 This utility model Figure 1 Schematic diagram of part of the structure.

[0026] Figure 6 This utility model Figure 5 A partial enlarged schematic diagram.

[0027] Figure 7 It is a schematic diagram of the three-dimensional structure of the frame body of the utility model.

[0028] Figure 8 It is a schematic diagram of the three-dimensional structure of the frame body of the utility model.

[0029] Figure 9 This utility model Figure 8 A partial enlarged schematic diagram.

[0030] Figure 10It is a schematic diagram of the three-dimensional structure of the flip lifting frame in the utility model.

[0031] In the picture:

[0032] Frame body 1, vehicle frame 11, hydraulic cylinder 12, cylinder bracket 13, steering bracket 14, universal movable wheel 15, movable wheel 2, sprocket 21, lifting fork 3, protective shell 4, drive motor 5, reduction gear 6, transmission chain 7, auxiliary escape device 8, transmission shaft 81, support frame 82, limiting protrusion 811, flip lifting frame 83, tilting frame 831, spline hole 832, auxiliary roller 833, driven gear 84, driving gear 85, servo motor 86. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0034] See also Figure 1-10 The embodiment of the utility model provides an AGV forklift with a buffer function, comprising a frame body 1, a lifting fork 3 movably connected to the top of the frame body 1, a protective shell 4 fixedly connected to the end of the frame body 1, and an auxiliary escape device 8 movably connected to the bottom of the protective shell 4;

[0035] The frame body 1 includes a U-shaped frame 11, and the bottom of the frame 11 is provided with two groups of connecting frames in a rectangular array to increase the distance between the frame 11 and the ground to prevent the chassis from contacting the ground and bottoming out during movement. Each group of the connecting frames is provided with two, and each group of the connecting frames is movably connected with a moving wheel 2.

[0036] In this embodiment, a rectangular array of cylinder brackets 13 are welded in the frame 11, and each of the cylinder brackets 13 is fixedly connected to a hydraulic cylinder 12. The hydraulic cylinder 12 is located below the lifting fork 3, and the end of the hydraulic cylinder 12 is fixedly connected to the lifting fork 3.

[0037] In this embodiment, the end of the frame 11 away from the moving wheel 2 is integrally provided with a steering bracket 14, and the bottom of the steering bracket 14 is fixedly connected to a universal moving wheel 15, which is located at the bottom of the protective shell 4;

[0038] A crossbeam fixedly connected to the end of the vehicle frame 11 is further provided in the protective shell 4, and the auxiliary escape device 8 is fixedly connected to the end of the vehicle frame 11 through the crossbeam.

[0039] In this embodiment, the auxiliary escape device 8 includes a transmission shaft 81 , both ends of which are integrally provided with limiting protrusions 811 , and the limiting protrusions 811 on each side are arranged in a circular array on the outside of the transmission shaft 81 .

[0040] In this embodiment, both ends of the transmission shaft 81 are provided with a flip lift frame 83, and each flip lift frame 83 includes an inclined stand 831, and a spline hole 832 corresponding to the limiting protrusion 811 is opened at the center of the inclined stand 831;

[0041] The end of the transmission shaft 81 passes through the inclined stand 831 , and the spline hole 832 is correspondingly inserted into the limiting protrusion 811 .

[0042] In this embodiment, both ends of the inclined stand 831 are inclined, and both ends of the inclined stand 831 are integrally provided with symmetrical connecting ear plates, and auxiliary rollers 833 are movably connected between each set of the connecting ear plates.

[0043] In this embodiment, each of the flip lift frames 83 is provided with support frames 82 on both sides, and mounting bearings are embedded in the ends of the support frames 82, and the inner rings of the mounting bearings are interference fit with the transmission shaft 81;

[0044] The top of the support frame 82 is fixedly connected to the crossbeam fixedly connected to the end of the frame 11 by bolts, and a servo motor 86 is fixedly connected to the middle position of the crossbeam.

[0045] In this embodiment, a driving gear 85 is fixedly connected to the end of the servo motor 86 , and a driven gear 84 corresponding to the driving gear 85 is fixedly connected to the transmission shaft 81 , and the driven gear 84 and the driving gear 85 are meshed with each other.

[0046] By adopting the above technical solution, the distance between the frame 11 and the ground is increased by the connecting frame provided at the bottom of the frame 11, thereby preventing the bottom of the frame 11 from rubbing against the ground and affecting normal use. During driving, when the universal movable wheel 15 falls into a pit and cannot move, the servo motor 86 drives the transmission shaft 81 to rotate through the transmission connection between the driven gear 84 and the driving gear 85, and rotates the flip lifting frame 83 in the horizontal state at both ends of the transmission shaft 81 to a vertical state. During the rotation process, the flip lifting frame 83 will lift the end of the frame body 1, thereby helping the universal movable wheel 15 at the end of the frame body 1 to quickly get out of trouble.

[0047] In this embodiment, the bottom of the frame 11 is symmetrically fixedly connected to the drive motor 5, and each end of the drive motor 5 is transmission-connected to a reduction box 6, and the reduction box 6 is fixedly connected to the frame 11;

[0048] The input shaft of the speed reducer 6 is drivingly connected to the output shaft of the driving motor 5 through a coupling, and a sprocket 21 is fixedly connected to the end of the output shaft of the driving motor 5.

[0049] In this embodiment, a plurality of the sprockets 21 are provided. One is connected to the speed reducer 6, and the other is fixedly connected to the side surface of the moving wheel 2 by bolts. A transmission chain 7 is sleeved outside the two sprockets 21, and both sides of the transmission chain 7 are drivingly connected to the sprockets 21.

[0050] In this embodiment, a hydraulic oil tank is fixedly connected in the protective housing 4. A hydraulic pump is fixedly connected to the side surface of the hydraulic oil tank. One end of the hydraulic pump extends to the inside of the hydraulic oil tank, and the other end of the hydraulic pump is communicated with the hydraulic cylinder 12 through a hydraulic pipe;

[0051] The hydraulic pump pumps out the hydraulic oil in the hydraulic oil tank, sends it into the hydraulic cylinder 12 through the hydraulic pipe, and pushes the end of the hydraulic cylinder 12 to move, thereby pushing the lifting fork 3 above to lift upward.

[0052] In this embodiment, a power supply is also fixedly connected in the protective housing 4. A controller is provided above the protective housing 4. The controller is electrically connected to the power supply, the driving motor 5, the servo motor 86, and the hydraulic pump through wires respectively;

[0053] The controller controls the power supply to supply power to the driving motor 5, the servo motor 8, and the hydraulic pump respectively. The driving motor 5 drives the moving wheel 2 to rotate through the driving connection between the sprocket 21 and the transmission chain 7, eliminating the need for manual dragging of the forklift and reducing the labor intensity.

[0054] The working principle of the present utility model is as follows: When in use, first move the frame body 1 into the groove at the bottom of the goods tray. The end of the hydraulic cylinder 12 rises through the hydraulic oil in the hydraulic oil tank, and the hydraulic cylinder 12 pushes the lifting fork 3 to lift the goods and the tray. At this time, the power supply supplies power to the driving motor 5. The driving motor 5 transmits the power to the speed reducer 6. After being decelerated by the speed reducer 6, it drives the moving wheel 2 to rotate through the driving connection between the transmission chain 7 and the sprocket 21, thereby carrying the goods. Since a connecting frame extending downward is provided at the bottom of the vehicle frame 11, the distance between the vehicle frame 11 and the ground is increased, preventing the bottom of the vehicle frame 11 from contacting the ground during movement. When the universal moving wheel 15 gets stuck in a pothole and cannot move, through the driving connection between the driven gear 84 and the driving gear 85, the servo motor 86 drives the transmission shaft rod 81 to rotate, and rotates the flipping and lifting frame 83 in the horizontal state at both ends of the transmission shaft rod 81 to the vertical state. During the rotation process, the flipping and lifting frame 83 will lift the end of the frame body 1, thereby helping the universal moving wheel 15 at the end of the frame body 1 to quickly get out of trouble, enabling the AGV forklift to be used on roads with complex terrains.

[0055] For those skilled in the art, it is obvious that the present utility model is not limited to the details of the above-described exemplary embodiments, and the present utility model can be implemented in other specific forms without departing from the spirit or basic characteristics of the present utility model. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present utility model is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be embraced within the present utility model. Any reference signs in the claims should not be construed as limiting the claims involved.

[0056] In addition, it should be understood that although this specification is described according to embodiments, not every embodiment only contains an independent technical solution. This narrative manner of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. An AGV forklift with a buffering function, characterized in that: The machine comprises a frame body (1), the upper portion of the frame body (1) is movably connected to a lifting fork (3), the end portion of the frame body (1) is fixedly connected to a protective shell (4), and the bottom portion of the protective shell (4) is movably connected to an auxiliary escape device (8); The frame body (1) includes a U-shaped frame (11), the bottom of the frame (11) is provided with two groups of connecting frames in a rectangular array, each group of the connecting frames is provided with two, and each group of the connecting frames is movably connected with moving wheels (2).

2. The AGV forklift with a buffering function according to claim 1, characterized in that: Cylinder brackets (13) are welded in a rectangular array in the vehicle frame (11), and each of the cylinder brackets (13) is fixedly connected to a hydraulic cylinder (12). The hydraulic cylinder (12) is located below the lifting fork (3), and the end of the hydraulic cylinder (12) is fixedly connected to the lifting fork (3).

3. The AGV forklift with a buffering function according to claim 2, wherein: The frame (11) is integrally provided with a steering bracket (14) at one end away from the moving wheel (2), and a universal moving wheel (15) is fixedly connected to the bottom of the steering bracket (14), and the universal moving wheel (15) is located at the bottom of the protective shell (4); A crossbeam fixedly connected to the end of the vehicle frame (11) is also provided in the protective shell (4), and the auxiliary escape device (8) is fixedly connected to the end of the vehicle frame (11) via the crossbeam.

4. The AGV forklift with a buffering function according to claim 3, wherein: The auxiliary escape device (8) comprises a transmission shaft (81), both ends of the transmission shaft (81) are integrally provided with limiting protrusions (811), and the limiting protrusions (811) on each side are arranged in a ring array on the outside of the transmission shaft (81).

5. The AGV forklift with a buffering function according to claim 4, characterized in that: Both ends of the transmission shaft (81) are provided with a flip lifting frame (83), and each flip lifting frame (83) includes an inclined stand (831), and a spline hole (832) corresponding to the limiting protrusion (811) is opened at the center of the inclined stand (831); The end of the transmission shaft (81) passes through the inclined stand (831), and the spline hole (832) is correspondingly inserted into the limiting protrusion (811).

6. The AGV forklift with a buffering function according to claim 5, characterized in that: Both ends of the inclined stand (831) are inclined, and both ends of the inclined stand (831) are integrally provided with symmetrical connecting lugs, and auxiliary rollers (833) are movably connected between each set of connecting lugs.

7. The AGV forklift with a buffering function according to claim 6, wherein: Each of the flip lifting frames (83) is provided with a support frame (82) on both sides, and the end of the support frame (82) is embedded with a mounting bearing, and the inner ring of the mounting bearing is interference-fitted with the transmission shaft (81); The top of the support frame (82) is fixedly connected to the crossbeam at the end of the vehicle frame (11) by bolts, and a servo motor (86) is fixedly connected to the middle position of the crossbeam.

8. The AGV forklift with a buffering function according to claim 7, characterized in that: The end of the servo motor (86) is fixedly connected to a driving gear (85), and the transmission shaft (81) is fixedly connected to a driven gear (84) corresponding to the driving gear (85), and the driven gear (84) and the driving gear (85) are meshed with each other.

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