Forklift moving quick-change type suspension arm device and forklift

Abstract

The forklift movable quick-change type suspension arm device comprises a suspension arm mechanism and a quick-change mechanism which are movably connected, and the suspension arm mechanism comprises two symmetrically-arranged suspension arm bodies and a fixing pipe; the suspension arm body is of a tubular structure integrally formed by a vertical arm and a horizontal arm, the end of the horizontal arm is slidably connected with a movable pipe, and a hook is fixedly arranged in the center of the movable pipe. And an upper hook assembly connected with a forklift is fixedly arranged on the outer side of the vertical arm. The quick change mechanism is used for supporting the suspension arm mechanism and comprises a bottom frame and a side frame which are connected together to form an L-shaped structure, the vertical arm is erected on the bottom frame, and a port of the horizontal arm is movably connected with the side frame. The hook can move in the front-back direction, and the laterally-moving distance adjusting fork can drive the suspension arm mechanism to move in the left-right direction; when the forklift gantry is lifted up and down, the lifting arm mechanism is driven to move up and down, so that the position of a lifting ladle is adjusted in multiple directions to lift the lifting ladle, and finally the lifting ladle is carried through the driving of the forklift.

Description

Technical Field

[0001] The utility model relates to the technical field of forklifts, in particular to a forklift mobile quick-change jib device and a forklift. Background Art

[0002] With the rapid development of China's industry, more and more products are exported. Forklifts, cranes and other equipment are needed for transshipment in warehouses, ports and other places. For goods with large weight, large volume or irregular shape, due to their physical characteristics, it is difficult to ship them through traditional packaging and transportation methods during transportation. Therefore, a special packaging and transportation method of sling bags needs to be adopted. Sling bags usually have sufficient load-bearing capacity and stability to ensure the safety of goods during transportation.

[0003] Forklifts are currently widely used in handling operations in industries such as electronics, automobiles, chemicals, pharmaceuticals, printing, tobacco, warehousing logistics, etc. For sling bag handling, due to its large volume, the existing forklift forks, buckets, fork sleeves, boom poles, flat clamps, etc. on forklifts cannot meet the requirements. Therefore, a matching forklift attachment needs to be designed, such as a jib for lifting sling bags. And making the jib be conveniently and quickly assembled with the forklift and the sling bag is the technical problem we need to solve. Summary of the Utility Model

[0004] Based on the above problems, the utility model provides a forklift mobile quick-change jib device and a forklift, which are used for quickly handling sling bags by the forklift, thereby improving the operation efficiency of sling bag handling.

[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is as follows:

[0006] A forklift mobile quick-change jib device includes a jib mechanism and a quick-change mechanism which are movably connected. The jib mechanism includes two symmetrically arranged jib bodies and a fixed pipe connected between the two jib bodies. The jib body is a tubular structure integrally formed by a vertical arm and a horizontal arm. An activity pipe is slidably connected to the end of the horizontal arm, and a hook is fixedly arranged at the center of the activity pipe. An upper hook assembly connected to the forklift is fixedly arranged on the outer side of the vertical arm. The quick-change mechanism is used to support the jib mechanism. The quick-change mechanism includes a bottom frame and a side frame connected together to form an L-shaped structure. The vertical arm is erected on the bottom frame, and the port of the horizontal arm is movably connected to the side frame.

[0007] In a further aspect, a driving device is installed inside the jib body. The movable end of the driving device is connected to the activity pipe to drive the activity pipe to move horizontally along the length direction of the horizontal arm.

[0008] In a further solution, the driving device is an oil cylinder. Oil cylinder bases are respectively installed at both ends of the movable pipe, and fixing holes for inserting the movable end of the oil cylinder are formed in the oil cylinder bases.

[0009] In a further solution, a connecting plate is fixedly arranged on the inner side of the boom body, and a U-shaped fixing bracket is sleeved on the driving device. The open end of the U-shaped fixing bracket is fixedly connected with the connecting plate.

[0010] In a preferred solution, the U-shaped fixing bracket includes a U-shaped frame. Fixing blocks are respectively fixedly arranged at both ends of the open end of the U-shaped frame, and connecting holes are formed in the fixing blocks; a rubber pad groove is formed in the inner ring of the U-shaped frame for clamping a rubber pad.

[0011] In a further solution, notch openings are respectively formed at the ends of the opposite sides of the horizontal arm; rollers are respectively installed at both ends of the movable pipe, and the rollers are arranged inside the inner cavity of the horizontal arm and move horizontally along the notch openings.

[0012] In a further solution, the upper hook assembly includes a clamping plate clamped on the vertical arm. The bottom end of the clamping plate is connected with a hook limiting plate through a transition plate, and the hook limiting plate is used for hanging and connecting the side-shifting and distance-adjusting fork of the forklift; a stop block mounting hook is installed at the bottom end of the vertical arm, and a stop block is installed on the stop block mounting hook for limiting the side-shifting and distance-adjusting fork.

[0013] In a further solution, a group of limiting columns are vertically and fixedly arranged at the end of the bottom frame, and a connecting rod is horizontally and fixedly arranged at the top end of the side frame; the bottom end of the vertical arm of the boom body is placed between the group of limiting columns for longitudinally limiting the boom body, and the connecting rod is movably inserted into the port of the horizontal arm of the boom body for horizontally limiting the boom body.

[0014] In a further solution, a reinforcing rod is connected between the bottom frame and the side frame, and an upper lifting hook is installed at the top end of the side frame.

[0015] The second object of the present invention is to provide a forklift, which is equipped with the above-mentioned forklift mobile quick-change boom device.

[0016] Therefore, the present application has the following advantages

[0017] 1) The movable rod of the present application realizes the movability of the hook, so that it is not necessary to manually operate to hang and pick up the lifting bag, and the quick handling of the lifting bag can be realized.

[0018] 2) The boom mechanism of the present application is matched with the quick-change mechanism, so that the quick replacement of the boom mechanism between the quick-change mechanism and the forklift is realized.

[0019] 3) The quick-change mechanism in this application serves as a placement rack for the boom mechanism, enabling the boom mechanism with a special-shaped structure to stand upright and achieve rapid docking with the side-shifting and distance-adjusting fork of the forklift; moreover, the overall occupied space is small, and the placement is more beautiful and tidy.

[0020] 4) The hook on the boom mechanism in this application can move in the front-back direction, while the side-shifting and distance-adjusting fork on the forklift can shift laterally in the left-right direction. After connecting the boom mechanism and the side-shifting and distance-adjusting fork, the side-shifting and distance-adjusting fork can drive the boom mechanism to move in the left-right direction; when the forklift mast rises and falls vertically, it drives the boom mechanism to move in the up-down direction, thereby realizing multi-directional position adjustment of the suspended package for lifting, and finally achieving transportation through the driving of the forklift.

[0021] 5) The shapes of the boom mechanism and the quick-change mechanism in this application are adapted to each other, and they are connected together to form a frame structure; and they are movably connected, that is, the bottom end of the vertical arm of the boom body is placed between the limit post groups for longitudinal limit of the boom body, and the port of the horizontal arm of the boom body is movably inserted into the connecting rod for horizontal limit of the boom body, thus facilitating the connection or separation operation between the two. Description of the Drawings

[0022] The schematic diagrams in the specification that form a part of this application are used to provide a further understanding of this application. The illustrative embodiments of this application and their descriptions are used to explain this application and do not constitute an improper limitation to this application.

[0023] Figure 1 Structural schematic of the boom mechanism in the present utility model Figure 1 ;

[0024] Figure 2 Structural schematic of the boom mechanism in the present utility model Figure 2 ;

[0025] Figure 3 Structural schematic diagram of the boom part in the present utility model;

[0026] Figure 4 Structural schematic diagram of the movable pipe in the present utility model;

[0027] Figure 5 Structural schematic diagram of the U-shaped fixing bracket in the present utility model;

[0028] Figure 6 Structural schematic diagram of the upper hook assembly in the present utility model;

[0029] Figure 7 Cooperation schematic of the boom mechanism, quick-change mechanism and side-shifting and distance-adjusting fork in the present utility model Figure 1 ;

[0030] Figure 8Schematic diagram of the cooperation between the boom mechanism, quick-change mechanism and side-shifting distance-adjusting fork of the present utility model Figure 2 ;

[0031] Figure 9 Schematic structural diagram of the quick-change mechanism in the present utility model;

[0032] Figure 10 Schematic diagram of hoisting a sling bag by the present utility model.

[0033] Description of marks in the figure:

[0034] 1 - Boom mechanism, 11 - Boom body, 111 - Notch, 112 - Connecting plate, 113 - Reinforcing plate, 114 - Stopper mounting hook, 12 - Movable pipe, 121 - Steel pipe, 122 - Hook, 123 - Cylinder base, 124 - Roller shaft head, 125 - Fixed hole; 13 - Fixed pipe, 14 - Roller, 15 - U-shaped fixing bracket, 151 - U-shaped frame, 152 - Fixed block, 153 - Connecting hole, 154 - Rubber pad groove; 16 - Cylinder, 17 - Upper hook assembly, 171 - Clamping plate, 172 - Transition plate, 173 - Hook limit plate, 18 - Stopper;

[0035] 2 - Quick-change mechanism, 21 - Bottom frame, 22 - Reinforcing rod, 23 - Side frame, 24 - Connecting rod, 25 - Upper lifting hook, 26 - Limit column group;

[0036] 3 - Side-shifting distance-adjusting fork;

[0037] 4 - Sling bag. Specific implementation mode

[0038] The following will refer to the accompanying drawings and combine with embodiments to detail the present application. It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments can be combined with each other.

[0039] Embodiment 1:

[0040] Referring to Figures 1-6 , this embodiment discloses a forklift mobile quick-change boom device, including a boom mechanism 1 and a quick-change mechanism 2 that are movably connected. The boom mechanism 1 includes two symmetrically arranged boom bodies 11, and a fixed pipe 13 connected between the two boom bodies 11; the fixed pipe 13 is arranged at intervals between the boom bodies 11. Among them, the fixed pipe located at the lower part of the vertical arm is directly welded to the inner side wall of the boom body 11 because there will be interference with the bracket of the side-shifting distance-adjusting fork 3 after passing through the boom body 11; the other parts of the fixed pipe 13 (located above the upper hook assembly 17) can be passed through the boom body 11 for convenient installation. A cover is installed at the end of the fixed pipe 13 passing through the outer end of the boom body 11 to prevent rainwater, dust, garbage, etc. from entering the interior of the boom body.

[0041] The two boom bodies 11 are tubular structures formed by integrally shaping a vertical arm and a horizontal arm. To improve the overall strength, a reinforcing plate 113 is connected between the vertical arm and the horizontal arm to prevent it from bending and deforming due to stress. One end of the horizontal arm is slidably connected with a movable pipe 12. The movable pipe 12 is as Figure 4 shown. It includes a steel pipe 121, and a hook 122 is welded at the center of the steel pipe 121 to ensure the stability of the device; an upper hook assembly 17 connected to a forklift is fixedly arranged on the outer side of the vertical arm. Both ends of the movable rod 12 are connected with roller axles 124 for installing rollers 14.

[0042] The quick-change mechanism 2 is used to support the boom mechanism 1. The quick-change mechanism 2 includes a bottom frame 21 and a side frame 23 connected together to form an L-shaped structure. The vertical arm is erected on the bottom frame 21, and the port of the horizontal arm is movably connected with the side frame 23. That is, the quick-change mechanism serves as a placement rack for the boom mechanism, enabling the boom mechanism with a special-shaped structure to stand upright and achieve quick docking with the side-shifting and distance-adjusting fork of the forklift; at the same time, in cooperation with the quick-change mechanism, it facilitates the quick replacement of the boom mechanism between the quick-change mechanism and the forklift.

[0043] In a further solution, a driving device is installed inside the boom body 11. The movable end of the driving device is connected to the movable pipe 12 to drive the movable pipe 12 to move horizontally along the length direction of the horizontal arm.

[0044] In this embodiment, the driving device is preferably an oil cylinder 16. Oil cylinder bases 123 are respectively installed at both ends of the movable pipe 12. The oil cylinder bases 123 are located inside the boom body 11. Fixing holes 125 for inserting the movable end of the oil cylinder 16 are opened on the oil cylinder bases 123, and then bolts are used for limiting and locking. The oil cylinder 16 drives the movable pipe 12 to move horizontally, thereby realizing the hanging and taking of the lifting bag 4.

[0045] To fix the oil cylinder 16, a connecting plate 112 is fixedly arranged inside the boom body 11. A U-shaped fixing frame 15 is sleeved on the driving device. As Figure 5 shown, the U-shaped fixing frame 15 includes a U-shaped frame 151. Fixed blocks 152 are fixedly arranged at both ends of the open end of the U-shaped frame 151. Connecting holes 153 are opened on the fixed blocks 152. The open end of the U-shaped fixing frame 15 supports the bottom end of the oil cylinder 16, and then is connected to the connecting plate 112. After bolts pass through the connecting plate 112 and the connecting holes 153 on the fixed blocks 152, they are fixed. That is, the cylinder block of the oil cylinder 16 is connected to the connecting plate 112 on the boom body 11 through the U-shaped fixing frame 15 to achieve fixed support. The movable end of the oil cylinder 16 is connected to the oil cylinder base 123, and the end different from the movable end can be fixed on the fixed pipe 3. Similarly, a mounting seat is fixed on the fixed pipe 3 for fixed connection.

[0046] A rubber pad groove 154 is provided in the inner ring of the U-shaped frame 151 for clamping a rubber pad. The rubber pad groove 154 is to prevent the rubber pad from detaching and ensure aesthetic installation; while the rubber pad mainly plays a buffering and protective role, because there is a rigid contact between the oil cylinder 16 and the U-shaped fixing frame 15, which will damage the paint on the surface of the oil cylinder 16.

[0047] In a further solution, notches 111 are provided at the ends of the opposite sides of the horizontal arm; rollers 14 are respectively installed at both ends of the movable tube 12, and the rollers 14 are arranged inside the inner cavity of the horizontal arm and move horizontally along the notches 111. Among them, the rollers 14 are installed on the roller shaft heads 124 of the movable rod 12 by bolts.

[0048] In a further solution, the upper hook assembly 17 includes a clamping plate 171 clamped on the vertical arm. The bottom end of the clamping plate 171 is connected with a hook limiting plate 173 through a transition plate 172. The hook limiting plate 173 is used for hanging and connecting the side-shifting distance-adjusting fork 3 of the forklift; a stop block mounting hook 114 is installed at the bottom end of the vertical arm, and a stop block 18 is installed on the stop block mounting hook 114 for limiting the side-shifting distance-adjusting fork 3, thereby realizing the up-and-down direction limit of the lifting arm mechanism 1.

[0049] The upper hook assembly 17 is used to hang the lifting arm mechanism 1 on the bracket of the side-shifting distance-adjusting fork 3. Among them, the upper hook assembly 17 is clamped on the lifting arm body 11 by the clamping plate 171 and welded, and is also strengthened by a reinforcing rib to ensure the welding strength of the upper hook assembly 17 and prevent the weld from cracking.

[0050] As Figure 9 shown, the quick-change mechanism 2 includes a bottom frame 21 and a side frame 23 connected in an L-shaped structure. A limiting post group 26 is vertically fixed at the end of the bottom frame 21, and a connecting rod 24 is horizontally fixed at the top end of the side frame 23; the bottom end of the vertical arm of the lifting arm body 11 is placed between the limiting post group 26 for longitudinally limiting the lifting arm body 11, and the connecting rod 24 is movably inserted into the port of the horizontal arm of the lifting arm body 11 for horizontally limiting the lifting arm body 11.

[0051] In a further solution, a reinforcing rod 22 is connected between the bottom frame 21 and the side frame 23. Both the bottom frame 21 and the side frame 23 are frame structures welded by longitudinal steel pipes and transverse rectangular steel pipes. The whole structure stability is further ensured by the reinforcing rod 22. Seals are installed at the ports of the exposed longitudinal steel pipes and transverse rectangular steel pipes to prevent rainwater from entering and causing internal corrosion. An upper lifting hook 25 is installed at the top end of the side frame 23. Since the quick-change mechanism 2 is relatively heavy, the upper lifting hook 25 is used for the lifting work of the quick-change mechanism 2 during welding and transportation, avoiding manual operation.

[0052] Refer to Figure 7 、8 1. As shown in Figure 10, the jib mechanism 1 is used to carry the lifting bag 4. The quick-change mechanism 2 is used to support the jib mechanism 1 and assist the jib mechanism 1 to be quickly replaced and installed on the side-shifting and distance-adjusting fork 3 of the forklift. The hook 122 on the jib mechanism 1 can move in the front-back direction; while the side-shifting and distance-adjusting fork 3 can shift laterally in the left-right direction, thereby driving the jib mechanism 1 to move in the left-right direction. When the forklift mast moves up and down, it drives the jib mechanism 1 to move in the up-down direction, so as to realize multi-directional adjustment of lifting or handling the lifting bag 4.

[0053] Embodiment 2:

[0054] A forklift is provided with the forklift mobile quick-change jib device as described in Embodiment 1, wherein the jib mechanism 1 is used as an attachment of the forklift, and the quick-change mechanism 2 is used as a placement rack for the jib mechanism 1, enabling the jib mechanism with a special-shaped structure to stand upright and achieve quick docking and installation with the side-shifting and distance-adjusting fork of the forklift.

[0055] Embodiment 3:

[0056] Specifically, as shown in Figure 7 and 8 Figure 18 is a schematic diagram of the quick-change process of the jib mechanism 1. In the figure, the forklift mast and the forklift body part are omitted. The side-shifting and distance-adjusting fork 3 is provided on the forklift mast (where the side-shifting and distance-adjusting fork 3 is an existing component on the forklift, and this application does not involve improving its structure). A bracket for connecting the forklift forks and the fork carriage is provided on the side-shifting and distance-adjusting fork 3, which is responsible for the side-shifting and distance-adjusting function of the forklift forks.

[0057] When the forklift needs to install the jib mechanism 1, it is necessary to remove the forklift forks equipped on the side-shifting and distance-adjusting fork 3 and lower the forklift mast; make the forklift slowly drive to the front of the jib assembly 1, and through the side-shifting function of the side-shifting and distance-adjusting fork 3 on the forklift, move the bracket therein to the lower end of the upper hook assembly 17 of the jib mechanism 1. The hook limit plate 173 on the upper hook assembly 17 hooks on the welding plate on the bracket, realizing the front-back direction limit of the bracket; raise the mast to ensure that the jib mechanism 1 is hung on the bracket of the side-shifting and distance-adjusting fork 3. Then, install the upper stop block 18 on the stop block mounting hook 114 through bolts. The stop block 18 supports the middle cross beam on the bracket, realizing the up-down direction limit of the bracket; finally, connect the jib mechanism 1 with the bracket. Finally, move the bracket laterally to the middle position of the forklift, that is, the center of the jib mechanism 1 coincides with the center of the side-shifting and distance-adjusting fork 3, and then make the forklift reverse, so as to separate the jib mechanism 1 from the quick-change mechanism 2, that is, the bottom end of the vertical arm of the jib body 11 moves out from between the limit post groups 26, and the port of the horizontal arm of the jib body 11 is separated from the connecting rod 24. Thus, the installation of the jib mechanism 1 on the forklift is completed.

[0058] As shown in Figure 10As shown in the figure, it is a working schematic diagram of a movable hook-type boom mechanism. The oil cylinders 16 on both sides of the boom mechanism 1 are controlled by a single-piece valve to ensure the synchronization of the oil cylinders, and then drive the movable rod 12 to move smoothly and linearly. When the forklift travels to the front of the hanging bag 4, the left and right side-shifting brackets are used to realize the left and right movement of the boom mechanism 1; then the telescoping of the oil cylinders 16 is controlled to realize the front and rear movement of the movable rod 12; through the above two actions, the hook 122 on the movable rod 12 is used to hang and pick up the hanging bag 4; then the hanging bag 4 is lifted by the mast lifting. Finally, the hanging bag 4 is transported by the forklift driving. The boom mechanism 1 of the present application is in a "7"-shaped structure, and the hook 122 is located at the front end, thus forming a space for accommodating the hanging bag 4, which is convenient for the rotation of the hanging bag 4.

[0059] When the boom mechanism 1 does not need to be installed on the forklift for lifting and transporting operations, it is separated from the side-shifting and distance-adjusting fork 3 of the forklift. Specifically, the forklift slowly travels to the front of the quick-change mechanism 2, the forklift mast descends, and through the side-shifting function of the side-shifting and distance-adjusting fork 3 on the forklift, the boom mechanism 1 connected to the bracket is moved to one side, so that the bottom end of the vertical arm of the boom body 11 of the boom mechanism 1 is placed between the limit post groups 26 on the quick-change mechanism 2, and then the forklift moves forward slightly to push the boom mechanism 1 forward. Due to the limitation and guidance of the two limit post groups 26 on the two boom bodies 11, during the forward movement, the port of the horizontal arm of the boom body 11 is connected to the connecting rod 24 on the quick-change mechanism 2, and the bottom end of the vertical arm of the boom body 11 is exactly located between the limit post groups 26, so that the boom mechanism 1 is erected on the quick-change mechanism 2. Then the stop block 18 is removed, and after the mast continues to descend, the bracket is separated from the upper hook assembly 17. The forklift retreats, and the boom mechanism 1 is supported on the quick-change mechanism 2 and separated from the forklift.

[0060] The above are only the preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present application are within the scope of protection of the pending claims of the present application.

Claims

1. A forklift mobile quick-change jib device, characterized in that: It includes a boom mechanism (1) and a quick-change mechanism (2) connected movably. The boom mechanism (1) includes two symmetrically arranged boom bodies (11), and a fixed pipe (13) connected between the two boom bodies (11); the boom body (11) is a tubular structure integrally formed by a vertical arm and a horizontal arm. An end of the horizontal arm is slidably connected with a movable pipe (12), and a hook (122) is fixedly arranged at the center of the movable pipe (12); an upper hook assembly (17) connected with a forklift is fixedly arranged on the outer side of the vertical arm; the quick-change mechanism (2) is used to support the boom mechanism (1), and the quick-change mechanism (2) includes a bottom frame (21) and a side frame (23) connected together in an L-shaped structure. The vertical arm is erected on the bottom frame (21), and the port of the horizontal arm is movably connected with the side frame (23).

2. The forklift mobile quick-change jib device according to claim 1, characterized in that: A driving device is installed inside the boom body (11), and the movable end of the driving device is connected with the movable pipe (12) to drive the movable pipe (12) to move horizontally along the length direction of the horizontal arm.

3. The forklift mobile quick-change jib device according to claim 2, characterized in that: The driving device is an oil cylinder (16). Oil cylinder bases (123) are respectively installed at both ends of the movable pipe (12), and fixing holes (125) for inserting the movable end of the oil cylinder (16) are formed in the oil cylinder bases (123).

4. A forklift mobile quick-change jib device according to claim 2, characterized in that: A connecting plate (112) is fixedly arranged inside the boom body (11), and a U-shaped fixing frame (15) is sleeved on the driving device. The open end of the U-shaped fixing frame (15) is fixedly connected with the connecting plate (112).

5. The forklift mobile quick-change jib device according to claim 4, characterized in that: The U-shaped fixing frame (15) includes a U-shaped frame (151). Fixing blocks (152) are fixedly arranged at both ends of the open end of the U-shaped frame (151), and connecting holes (153) are formed in the fixing blocks (152); a rubber pad groove (154) is formed in the inner ring of the U-shaped frame (151) for clamping a rubber pad.

6. A forklift mobile quick-change jib device according to claim 1, characterized in that: Notches (111) are formed at the ends of the opposite sides of the horizontal arm; rollers (14) are respectively installed at both ends of the movable pipe (12), and the rollers (14) are arranged inside the inner cavity of the horizontal arm and move horizontally along the notches (111).

7. A forklift mobile quick-change jib device according to claim 1, characterized in that: The upper hook assembly (17) includes a clamping plate (171) clamped on the vertical arm. The bottom end of the clamping plate (171) is connected with a hook limiting plate (173) through a transition plate (172). The hook limiting plate (173) is used for hanging and connecting a side-shifting and distance-adjusting fork (3) of a forklift; a stop block mounting hook (114) is installed at the bottom end of the vertical arm, and a stop block (18) is installed on the stop block mounting hook (114) for limiting the side-shifting and distance-adjusting fork (3).

8. A forklift mobile quick-change jib device according to claim 1, characterized in that: A limiting post group (26) is vertically and fixedly arranged at the end of the bottom frame (21), and a connecting rod (24) is horizontally and fixedly arranged at the top end of the side frame (23); the bottom end of the vertical arm of the boom body (11) is placed between the limiting post group (26) for longitudinally limiting the boom body (11), and the connecting rod (24) is movably inserted into the port of the horizontal arm of the boom body (11) for horizontally limiting the boom body (11).

9. The forklift mobile quick-change jib device according to claim 8, characterized in that: A reinforcing rod (22) is connected between the bottom frame (21) and the side frame (23), and an upper lifting hook (25) is installed at the top of the side frame (23).

10. A forklift, characterized in that: It is equipped with the forklift mobile quick-change jib device described in any one of claims 1-9.

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