Double fork forklift

Abstract

The present invention discloses a double-fork forklift, wherein the double-fork forklift comprises a vehicle body, an upper mast mechanism, a lower mast mechanism, an upper fork and a lower fork, wherein the upper mast mechanism is arranged on one side of the vehicle body; the lower mast mechanism is arranged on one side of the vehicle body and is located below the upper mast mechanism; the upper fork is arranged on the upper mast mechanism in a manner that it can be raised and lowered; the lower fork is arranged on the lower mast mechanism in a manner that it can be raised and lowered and is located below the upper fork. The technical solution of the present invention aims to improve the efficiency of forklifts in transporting goods by arranging two sets of masts and two sets of forks on one side of the forklift.

Description

Technical Field

[0001] The present invention relates to the technical field of forklifts, and in particular to a double-fork forklift. Background Art

[0002] A forklift is a vehicle that uses a fork as a picking device and can lift goods to a certain height for transportation. Existing forklifts are usually manually operated. In order to avoid the confusion of manual operation logic, only one set of forks can be set on the mast of the forklift.

[0003] However, with the popularization of unmanned forklift technology, the efficiency of forklifts with a single set of forks is extremely low and can no longer meet the needs of existing warehousing operations. Summary of the invention

[0004] The main purpose of the present invention is to provide a double-fork forklift, which aims to improve the efficiency of transporting goods by the forklift by arranging two sets of door frames and two sets of forks on one side of the forklift.

[0005] To achieve the above object, the present invention provides a double-fork forklift, comprising:

[0006] Vehicle body;

[0007] An upper mast mechanism, the upper mast mechanism being arranged on one side of the vehicle body;

[0008] A lower mast mechanism, the lower mast mechanism being arranged on one side of the vehicle body and located below the upper mast mechanism;

[0009] an upper fork, the upper fork being liftably disposed on the upper mast mechanism; and

[0010] The lower fork is liftably arranged on the lower mast mechanism and is located below the upper fork.

[0011] In one embodiment of the present invention, the upper fork comprises:

[0012] A connecting portion, the connecting portion being slidably connected to the upper mast mechanism; and

[0013] A fork arm extends from the connecting portion toward a side away from the connecting portion.

[0014] In one embodiment of the present invention, the fork arm is connected to the lower end of the connecting portion, and the upper end of the connecting portion is slidably connected to the upper mast mechanism, so that the fork arm can sink to the front of the lower mast mechanism.

[0015] In one embodiment of the present invention, an avoidance groove is formed at the bottom of the fork arm, the avoidance groove is adapted to the lower fork, and the lower fork can be received in the avoidance groove.

[0016] In one embodiment of the present invention, the upper door frame mechanism comprises:

[0017] An upper outer door frame, the upper outer door frame is connected to the vehicle body;

[0018] An upper inner door frame, wherein the upper inner door frame is liftably arranged on the inner side of the upper outer door frame, and the connecting portion is liftably arranged on the inner side of the upper inner door frame;

[0019] An upper driving member, the upper driving member is arranged on the upper outer mast, the movable end of the upper driving member is connected to the upper inner mast, and is used to drive the upper inner mast to rise or fall relative to the upper outer mast;

[0020] The upper inner door frame is symmetrically provided with two sprocket wheels, a chain is wound around the sprocket wheels, one end of the chain is connected to the upper outer door frame, and the other end is connected to the upper end of the connecting part.

[0021] In one embodiment of the present invention, the lower mast mechanism comprises:

[0022] Lower outer door frame;

[0023] The lower inner mast is liftably arranged on the inner side of the lower outer mast, and the lower fork is arranged on a side of the lower inner mast away from the vehicle body.

[0024] In one embodiment of the present invention, the double-fork forklift also includes a load-bearing platform, which is arranged on one side of the vehicle body and above the lower mast mechanism, and the upper mast mechanism is arranged on the load-bearing platform. The load-bearing platform is provided with an avoidance hole to avoid the lower inner mast that can be raised and lowered.

[0025] In one embodiment of the present invention, a side plate is provided on one side of the load-bearing platform, the side plate is arranged toward the outside of the upper gantry mechanism and extends along the front and rear direction of the vehicle body, the side plate is connected to the vehicle body, and the avoidance hole is provided between the upper gantry mechanism and the side plate.

[0026] In one embodiment of the present invention, a connecting member is provided on the outer side of the upper mast mechanism, the connecting member is located above the side panel, and the two ends of the connecting member are respectively connected to the upper mast mechanism and the side panel, and the side panel, the connecting member and the outer side of the upper mast mechanism enclose a avoidance space, and the avoidance space is connected to the avoidance hole, and is used to avoid the lower inner mast that can be raised and lowered;

[0027] And / or, the bearing platform further comprises a back plate, the back plate is located between the upper gantry mechanism and the vehicle body and between the two side plates, and the back plate is respectively fixedly connected to the side plates.

[0028] In one embodiment of the present invention, the carrying platform is arranged to be translatably arranged along the front-rear direction of the vehicle body so as to move closer to or away from the vehicle body;

[0029] And / or, the lower door frame mechanism can be arranged to be translated along the front-rear direction of the vehicle body to move closer to or away from the vehicle body.

[0030] The double-fork forklift of the technical solution of the present invention comprises a vehicle body, an upper mast mechanism, a lower mast mechanism, an upper fork and a lower fork, wherein the upper fork and the lower fork are respectively arranged on the upper mast mechanism and the lower mast mechanism in a manner that they can be raised and lowered, and the lower fork is located below the upper fork. When picking up goods, the upper fork and the lower fork are respectively lowered to the bottom along the upper mast mechanism and the lower mast mechanism, and the vehicle body moves forward so that the upper fork completes the forking of the first pallet of goods, the upper fork rises along the upper mast mechanism, and drives the first pallet of goods to be lifted to a certain height, the lower fork completes the forking of the second pallet of goods, and rises along the lower mast mechanism, and drives the second pallet of goods to be lifted to a certain height, and then the double-fork forklift starts to transport the goods and moves to the unloading area.

[0031] In the unloading area, the lower fork descends along the lower mast mechanism, driving the second pallet of goods to descend. After the second pallet of goods is unloaded, the upper fork descends along the upper mast mechanism, driving the first pallet of goods to descend, completing the unloading of the first pallet of goods. The setting of the upper and lower masts and forks enables the double-fork forklift to pick up two pallets of goods in one trip between the pickup area and the unloading area, improving the efficiency of the double-fork forklift in loading and unloading, thereby improving the work efficiency of warehousing and transportation. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0033] Figure 1 It is a structural schematic diagram of an embodiment of a double-fork forklift of the present invention;

[0034] Figure 2 It is a structural schematic diagram of another embodiment of a double-fork forklift of the present invention;

[0035] Figure 3 for Figure 2 Another perspective picture;

[0036] Figure 4 for Figure 2 Another perspective picture;

[0037] Figure 5 It is a structural schematic diagram of an embodiment of the lower door frame mechanism of the present invention.

[0038] Description of Figure Numbers:

[0039]

[0040]

[0041] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0042] 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 described embodiments 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 creative work are within the scope of protection of the present invention.

[0043] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0044] In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0045] In addition, in the present invention, descriptions such as "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the meaning of "and / or" appearing in the full text is to include three parallel solutions. Taking "A and / or B as an example", it includes solution A, or solution B, or solutions that satisfy both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0046] Reference Figures 1 to 5 The present invention provides a double-fork forklift 100, comprising:

[0047] Car body 10;

[0048] An upper mast mechanism 20, wherein the upper mast mechanism 20 is disposed on one side of the vehicle body 10;

[0049] A lower mast mechanism 30, wherein the lower mast mechanism 30 is disposed on one side of the vehicle body 10 and is located below the upper mast mechanism 20;

[0050] An upper fork 40, wherein the upper fork 40 is liftably disposed on the upper mast mechanism 20; and

[0051] The lower fork 50 is liftably disposed on the lower mast mechanism 30 and is located below the upper fork 40 .

[0052] The double-fork forklift 100 of the technical solution of the present invention comprises a vehicle body 10, an upper mast mechanism 20, a lower mast mechanism 30, an upper fork 40 and a lower fork 50, wherein the upper fork 40 and the lower fork 50 are respectively arranged on the upper mast mechanism 20 and the lower mast mechanism 30 in a manner that they can be raised and lowered, and the lower fork 50 is located below the upper fork 40. When picking up goods, the upper fork 40 and the lower fork 50 are respectively lowered to the bottom along the upper mast mechanism 20 and the lower mast mechanism 30, and the vehicle body 10 moves forward to make the upper fork 40 complete the forking of the first pallet of goods, the upper fork 40 rises along the upper mast mechanism 20, and drives the first pallet of goods to be lifted to a certain height, the lower fork 50 completes the forking of the second pallet of goods, and rises along the lower mast mechanism 30, and drives the second pallet of goods to be lifted to a certain height, and the double-fork forklift 100 starts to transport goods and moves to the unloading area.

[0053] In the unloading area, the lower fork 50 descends along the lower mast mechanism 30, driving the second pallet of goods to descend. After the unloading of the second pallet of goods is completed, the upper fork 40 descends along the upper mast mechanism 20, driving the first pallet of goods to descend, and completing the unloading of the first pallet of goods. The arrangement of the upper and lower masts and forks enables the double-fork forklift 100 to fork two pallets of goods in one trip between the pickup area and the unloading area, thereby improving the efficiency of loading and unloading of the double-fork forklift 100, thereby improving the work efficiency of warehousing and transportation.

[0054] A driving assembly (not shown) is disposed inside the vehicle body 10 , and a steering wheel (not shown) is disposed at the bottom of the vehicle body 10 . The driving assembly is in transmission connection with the steering wheel and can drive the steering wheel to rotate so as to move the double-fork forklift 100 .

[0055] The upper fork 40 and the lower fork 50 can be raised and lowered synchronously along the upper frame mechanism 20 and the lower frame mechanism 30, or can be raised and lowered independently on the upper frame mechanism 20 and the lower frame mechanism 30. When the upper fork 40 and the lower fork 50 are raised and lowered synchronously, a synchronization rod (not shown) is provided between the upper fork 40 and the lower fork 50; when the upper fork 40 and the lower fork 50 are raised and lowered independently, the upper fork 40 and the lower fork 50 are raised and lowered along the upper frame mechanism 20 and the lower frame mechanism 30, respectively, thereby improving the cargo transportation efficiency of the double-fork forklift 100.

[0056] The double-fork forklift 100 may be an unmanned forklift, and the operation of the double-fork forklift 100 may be controlled by manual remote control, or the double-fork forklift 100 may be operated and run unmanned by a preset program.

[0057] During the process of forking goods by the double-fork forklift 100, the upper fork 40 can be lifted to a higher height to achieve loading and unloading at a certain height. The lower fork 50 is lifted to a lower height and only carries goods on the ground. The upper fork 40 can be a welded fork, and the lower fork 50 can be a forged fork.

[0058] Reference Figures 1 to 4 In one embodiment of the present invention, the upper fork 40 comprises:

[0059] A connecting portion 41, wherein the connecting portion 41 is slidably connected to the upper door frame mechanism 20; and

[0060] The fork arm 42 extends from the connecting portion 41 to a side away from the connecting portion 41 .

[0061] In the technical solution of an embodiment of the present invention, the upper fork 40 and the lower fork 50 are respectively arranged on the side of the upper mast mechanism 20 and the lower mast mechanism 30 away from the vehicle body 10, and the connecting portion 41 is slidably connected to the inner side of the upper mast mechanism 20, and can be raised and lowered under the drive of the upper mast mechanism 20. The fork arm 42 is used to fork and carry the goods, so that the upper fork 40 drives the goods to be lifted.

[0062] Reference Figures 1 to 4 In one embodiment of the present invention, the fork arm 42 is connected to the lower end of the connecting portion 41, and the upper end of the connecting portion 41 is slidably connected to the upper mast mechanism 20, so that the fork arm 42 can sink to the front of the lower mast mechanism 30.

[0063] In the technical solution of one embodiment of the present invention, the lower end of the connecting part 41 is connected to the fork arm 42, and the upper end of the connecting part 41 is slidably connected to the upper mast mechanism 20. When the connecting part 41 descends to the bottom along the upper mast mechanism 20, the lower end of the connecting part 41 can exceed the bottom of the upper mast mechanism 20 and extend to the front of the lower mast mechanism 30 to reach the ground for forking goods, thereby increasing the forking range of the upper fork 40 and improving the applicability of the upper mast mechanism 20 and the upper fork 40.

[0064] Reference Figures 1 to 4 In one embodiment of the present invention, a avoidance groove 421 is formed at the bottom of the fork arm 42 , and the avoidance groove 421 is adapted to the lower fork 50 , and the lower fork 50 can be received in the avoidance groove 421 .

[0065] In the technical solution of one embodiment of the present invention, the avoidance groove 421 is arranged at the bottom of the fork arm 42 and is arranged toward the lower fork 50. When the upper fork 40 is lowered to the lowest position, the lower fork 50 is accommodated in the avoidance groove 421 of the fork arm 42 to avoid interference between the lower fork 50 and the upper fork 40. The setting of the avoidance groove 421 improves the stability of the internal structure of the double-fork forklift 100.

[0066] Reference Figures 1 to 5 In one embodiment of the present invention, the upper door frame mechanism 20 includes:

[0067] An upper outer door frame 21, wherein the upper outer door frame 21 is connected to the vehicle body 10;

[0068] An upper inner door frame 22, wherein the upper inner door frame 22 is levitationally disposed on the inner side of the upper outer door frame 21, and the connecting portion 41 is levitationally disposed on the inner side of the upper inner door frame 22;

[0069] An upper driving member 23, wherein the upper driving member 23 is disposed on the upper outer mast 21, and a movable end of the upper driving member 23 is connected to the upper inner mast 22, and is used to drive the upper inner mast 22 to rise or fall relative to the upper outer mast 21;

[0070] The upper inner door frame 22 is symmetrically provided with two sprocket wheels 24 , and a chain 25 is wound around the sprocket wheels 24 . One end of the chain 25 is connected to the upper outer door frame 21 , and the other end is connected to the upper end of the connecting portion 41 .

[0071] In the technical solution of an embodiment of the present invention, the upper driving member 23 can be a cylinder or a hydraulic cylinder, and the type of the upper driving member 23 is not limited here. When the upper driving member 23 is a hydraulic cylinder, the hydraulic cylinder is fixed to the upper outer mast 21, and the movable end of the hydraulic cylinder is connected to the top of the upper inner mast 22, which can drive the upper inner mast 22 to rise and fall relative to the upper outer mast 21, and the upper fork 40 can rise and fall along the upper inner mast 22. When the upper inner mast 22 rises, the upper fork 40 increases the upper limit of the lifting height, and the goods can be lifted to a higher position.

[0072] Two sprockets 24 are symmetrically arranged on the inner side of the upper inner mast 22, and a chain 25 is wound around the sprocket 24. Both ends of the chain 25 are respectively connected to the upper outer mast 21 and the connecting part 41 of the upper fork 40. When the upper inner mast 22 drives the sprocket 24 to rise, one end of the chain 25 is fixed to the upper outer mast 21. Since the total length of the chain 25 remains unchanged, the other end drives the connecting part 41 to rise, thereby driving the entire upper fork 40 to rise along the upper inner mast 22. While driving the upper fork 40 to lift the goods, the lifting height of the upper fork 40 is also increased. The setting of the upper mast mechanism 20 enhances the ability of the upper fork 40 to lift goods.

[0073] Reference Figure 5 In one embodiment of the present invention, the lower mast mechanism 30 comprises:

[0074] Lower outer door frame 31;

[0075] The lower inner mast 32 is liftably disposed on the inner side of the lower outer mast 31 , and the lower fork 50 is disposed on a side of the lower inner mast 32 away from the vehicle body 10 .

[0076] In the technical solution of an embodiment of the present invention, the lower fork 50 only carries the goods on the ground, and only needs to lift the goods to a height above the ground, so the lifting height of the lower fork 50 is relatively low. The lower mast mechanism 30 adapted to the lower fork 50 includes a lower outer mast 31, a lower inner mast 32 and a lower driving member (not shown), wherein the lower outer mast 31, the lower inner mast 32 and the lower driving member are all located outside the upper mast mechanism 20 to avoid interference between the lower mast mechanism 30 and the upper mast mechanism 20 located above it during the lifting process, thereby affecting the loading of the double forklift 100. The lower driving member can be a cylinder or a hydraulic cylinder, and the type of the lower driving member is not limited here. When the lower driving member is a hydraulic cylinder, the hydraulic cylinder is fixed to the lower outer mast 31, and the movable end of the hydraulic cylinder is connected to the top of the lower inner mast 32, which can drive the lower inner mast 32 to rise and fall relative to the lower outer mast 31. The lower fork 50 is fixed to the side of the lower inner mast 32 away from the vehicle body 10. The lower fork 50 can rise and fall with the rise and fall of the lower inner mast 32 to drive the goods to be lifted or lowered, thereby completing loading or unloading.

[0077] Reference Figures 1 to 5 In one embodiment of the present invention, the double-fork forklift 100 also includes a load-bearing platform 60, which is disposed on one side of the vehicle body 10 and above the lower mast mechanism 30, and the upper mast mechanism 20 is disposed on the load-bearing platform 60. The load-bearing platform 60 is provided with an avoidance hole 61 to avoid the lower inner mast 32 that can be raised and lowered.

[0078] In the technical solution of an embodiment of the present invention, the upper mast mechanism 20 is arranged above the lower mast mechanism 30 and is arranged off the ground. In order to improve the stability of the upper mast mechanism 20 and prevent it from shaking during the lifting process, a bearing platform 60 is provided above the lower mast mechanism 30. The bearing platform 60 is provided on one side of the vehicle body 10 and is used to carry the upper mast mechanism 20 to prevent the upper fork 40 from losing load when it is lifted to a certain height. The bearing platform 60 is provided with an avoidance hole 61. When the lower inner mast 32 is lifted, the lower inner mast 32 passes through the avoidance hole 61 from below, thereby avoiding interference with the bearing platform 60, thereby improving the stability of the internal structure of the double-fork forklift 100.

[0079] Reference Figures 1 to 5 In one embodiment of the present invention, a side panel 62 is provided on one side of the carrying platform 60, and the side panel 62 is arranged toward the outer side of the upper mast mechanism 20 and extends along the front and rear direction of the vehicle body 10. The side panel 62 is connected to the vehicle body 10, and the avoidance hole 61 is provided between the upper mast mechanism 20 and the side panel 62.

[0080] In the technical solution of one embodiment of the present invention, the load-bearing platform 60 enhances the connection strength with the vehicle body 10 through the side plates 62, and the upper mast mechanism 20 arranges the upper fork 40 and the weight of the lifted cargo on the vehicle body 10 through the load-bearing platform 60 and the side plates 62 to increase the total counterweight of the vehicle body 10, thereby preventing the vehicle body 10 from tipping forward when lifting cargo due to insufficient counterweight, or preventing the upper mast mechanism 20 from losing load due to insufficient counterweight and being unable to lift the cargo to a higher height.

[0081] At the same time, the side plates 62 play a role in auxiliary support of the upper mast mechanism 20 , thereby preventing the upper mast mechanism 20 from shaking in the left-right direction of the vehicle body 10 and causing overturning.

[0082] Reference Figures 1 to 5 In one embodiment of the present invention, a connecting member 63 is provided on the outer side of the upper mast mechanism 20, and the connecting member 63 is located above the side plate 62. The two ends of the connecting member 63 are respectively connected to the upper mast mechanism 20 and the side plate 62. The side plate 62, the connecting member 63 and the outer side of the upper mast mechanism 20 enclose a avoidance space 64, and the avoidance space 64 is connected to the avoidance hole 61, and is used to avoid the lower inner mast 32 that can be raised and lowered;

[0083] There are two side panels 62, which are located on both sides of the carrying platform 60 and are arranged opposite to each other; there are two connecting members 63, which are arranged corresponding to the two side panels 62 respectively;

[0084] The carrying platform 60 further includes a back plate 65 , which is located between the upper gantry mechanism 20 and the vehicle body 10 and between the two side plates 62 . The back plate 65 is fixedly connected to the side plates 62 and the connecting members 63 , respectively.

[0085] In the technical solution of one embodiment of the present invention, when the upper mast mechanism 20 is arranged on the surface of the load-bearing platform 60, in order to improve the stability of the connection between the upper mast mechanism 20 and the load-bearing platform 60, a connecting member 63 is arranged between the side plate 62 and the upper mast mechanism 20, and the two ends of the connecting member 63 are respectively connected to the inner side of the side plate 62 and the outer side of the upper mast mechanism 20, so that part of the weight of the upper mast mechanism 20 is distributed on the side plate 62, thereby optimizing the overall counterweight structure of the forklift. At the same time, the connecting member 63 plays a role in reinforcing the structural strength, thereby preventing the upper mast mechanism 20 from tipping over in the left and right directions when the vehicle body 10 turns, thereby improving the stability of the double-fork forklift 100 during driving.

[0086] The connecting member 63 is also enclosed with the inner wall of the side plate 62 and the outer side of the upper outer mast 21 to form an escape space 64 connected to the escape hole 61. The depth of the escape space 64 is set accordingly according to the lifting height of the lower inner mast 32, and the depth of the escape space 64 is related to the setting of the connecting member 63. The connecting member 63 can be set at an angle to increase the depth of the escape space 64 while making the connection between the upper mast mechanism 20 and the side plate 62 more stable. When the lower inner mast 32 rises and falls, it can extend into and out of the escape space 64 to avoid interference with the load-bearing platform 60, thereby improving the stability of the internal structure of the double-fork forklift 100.

[0087] Reference Figures 1 to 5 In one embodiment of the present invention, the carrying platform 60 is arranged to be translatably disposed along the front-rear direction of the vehicle body 10 so as to move closer to or away from the vehicle body 10;

[0088] And / or, the lower door frame mechanism 30 can be arranged to be translated along the front-rear direction of the vehicle body 10 to move closer to or away from the vehicle body 10.

[0089] In the technical solution of one embodiment of the present invention, the upper gantry mechanism 20 is arranged on the load-bearing platform 60. When a forklift picks up goods, the load-bearing platform 60 and the lower gantry mechanism 30 can move forward away from the vehicle body 10 to fork up the goods. After completing the forklift of the goods, they can move backward close to the vehicle body 10 to reduce the volume of the vehicle body 10 during transportation. The smaller vehicle volume can design a smaller channel for forklift transportation to increase the storage capacity.

[0090] The carrying platform 60 and the lower gantry mechanism 30 can be translated synchronously along the front-rear direction of the vehicle body 10 , or can be translated independently along the front-rear direction of the vehicle body 10 , which is not limited here.

[0091] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the inventive concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A double-fork forklift, characterized in that: include: Vehicle body; An upper mast mechanism, the upper mast mechanism being arranged on one side of the vehicle body; A lower mast mechanism, the lower mast mechanism being arranged on one side of the vehicle body and located below the upper mast mechanism; An upper fork, the upper fork being liftably disposed on the upper mast mechanism; as well as A lower fork, which is liftably disposed on the lower mast mechanism and is located below the upper fork; The lower door frame mechanism comprises: Lower outer door frame; A lower inner mast, wherein the lower inner mast is liftably disposed on the inner side of the lower outer mast, and the lower fork is disposed on a side of the lower inner mast away from the vehicle body; The double-fork forklift also includes a load-bearing platform, which is arranged on one side of the vehicle body and above the lower mast mechanism. The upper mast mechanism is arranged on the load-bearing platform. The load-bearing platform is provided with an avoidance hole to avoid the lower inner mast that can be raised and lowered.

2. The double-fork forklift according to claim 1, characterized in that: The upper fork comprises: A connecting portion, the connecting portion being slidably connected to the upper mast mechanism; and A fork arm extends from the connecting portion to a side away from the connecting portion.

3. The double-fork forklift according to claim 2, characterized in that: The fork arm is connected to the lower end of the connecting portion, and the upper end of the connecting portion is slidably connected to the upper mast mechanism, so that the fork arm can sink to the front of the lower mast mechanism.

4. The double-fork forklift according to claim 3, characterized in that: An avoidance groove is formed at the bottom of the fork arm, the avoidance groove is adapted to the lower fork, and the lower fork can be accommodated in the avoidance groove.

5. The double-fork forklift according to claim 2, characterized in that: The upper door frame mechanism comprises: An upper outer door frame, the upper outer door frame is connected to the vehicle body; An upper inner door frame, wherein the upper inner door frame is liftably arranged on the inner side of the upper outer door frame, and the connecting portion is liftably arranged on the inner side of the upper inner door frame; An upper driving member, the upper driving member is arranged on the upper outer mast, the movable end of the upper driving member is connected to the upper inner mast, and is used to drive the upper inner mast to rise or fall relative to the upper outer mast; The upper inner door frame is symmetrically provided with two sprocket wheels, a chain is wound around the sprocket wheels, one end of the chain is connected to the upper outer door frame, and the other end is connected to the upper end of the connecting part.

6. The double-fork forklift according to claim 1, characterized in that: A side plate is provided on one side of the bearing platform, the side plate is arranged toward the outside of the upper mast mechanism and extends along the front-rear direction of the vehicle body, the side plate is connected to the vehicle body, and the avoidance hole is arranged between the upper mast mechanism and the side plate.

7. The double-fork forklift according to claim 6, characterized in that: A connecting piece is provided on the outer side of the upper mast mechanism, the connecting piece is located above the side plate, and the two ends of the connecting piece are respectively connected to the upper mast mechanism and the side plate, and the side plate, the connecting piece and the outer side of the upper mast mechanism enclose a avoidance space, and the avoidance space is connected to the avoidance hole, and is used to avoid the lower inner mast that can be raised and lowered; And / or, the bearing platform further comprises a back plate, the back plate is located between the upper gantry mechanism and the vehicle body and between the two side plates, and the back plate is respectively fixedly connected to the side plates.

8. The double-fork forklift according to claim 7, characterized in that: The carrying platform is arranged to be translatably arranged along the front-rear direction of the vehicle body so as to move closer to or away from the vehicle body; And / or, the lower door frame mechanism can be arranged to be translated along the front-rear direction of the vehicle body to move closer to or away from the vehicle body.

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