Forklift mast structure

Abstract

The utility model relates to a kind of forklift gantry structure, including pallet fork structure, blocking goods board and buffer structure;It is connected with pallet fork structure on inner gantry, it is simultaneously provided with a blocking goods board on the gantry board of inner gantry inboard top, blocking goods board is perpendicular to gantry board and is set and blocking goods board covers up the window in the upper portion of inner gantry and outer gantry, after goods are taken by pallet fork, since goods are inclined to inner gantry inboard, blocking goods rack blocks goods from falling from window;Buffer structure is arranged on inner gantry, and buffer structure includes elastic member and airbag layer;The lower surface of the top plate of inner gantry is provided with multiple elastic members, and the lower surface of multiple elastic members is connected with airbag layer;When working, airbag layer is inflated, inner gantry is lowered to its top plate is close to the upper end of outer gantry and is adhered, airbag layer and elastic member buffer the two, to avoid collision damage.The utility model reaches the beneficial effect is: avoid goods slide and the collision caused by buffer lifting, improve structural stability.

Description

Technical Field

[0001] This utility model relates to the field of forklift mast technology, and in particular to a forklift mast structure. Background Technology

[0002] A forklift is an engineering machine used for loading, unloading, stacking, and transporting packaged or boxed goods. It is widely used in production workshops, construction, roads, mines, and ports. It is usually powered by a fuel engine or battery. One of the most important components of a forklift is the mast, which consists of an outer mast, an inner mast, and a fork carriage. The forklift loads and transports goods by operating the mast. The outer mast is hinged to the forklift via a hydraulic cylinder structure, enabling it to tilt forward and backward. The outer mast is also connected to the inner mast via a hydraulic cylinder structure, allowing it to rise and fall. The inner mast is equipped with a fork carriage, which is used to lift goods.

[0003] Currently, when a forklift is transporting goods normally, the outer mast is stable and does not need to tilt. However, to prevent the goods from slipping outwards due to inertia after being lifted by the forks (at which time the outer mast needs to tilt forward and backward), the fork ends are usually set to be upturned, causing the goods to tilt towards the cab. At this time, because the current inner mast is generally low in height and the gaps between the frame plates are too large, and the gap between the inner mast and the outer mast is also too large, it is not conducive to blocking some stacked goods or a large number of small bottles or boxes, which may fall or collide with the front of the cab. At the same time, when the hydraulic cylinder in the outer mast raises and lowers the inner mast, it is easy to collide with the outer mast when the inner mast moves up or down to the limit. The current device does not have a buffer component in the slide rail, which will reduce the service life or affect the stability of the overall structure in the long run.

[0004] Therefore, based on customer feedback regarding the shortcomings of the existing device, the inventors made further improvements to overcome the aforementioned problems. Utility Model Content

[0005] The purpose of this invention is to overcome the shortcomings of the prior art and provide a forklift mast structure that avoids cargo slippage, buffers collisions and vibrations caused by the vertical movement of the inner mast, and improves structural stability.

[0006] The purpose of this utility model is achieved through the following technical solution: a forklift mast structure, including an outer mast and an inner mast; the outer mast is driven by a power source to achieve forward and backward tilting movements, and the outer mast is movably connected to the inner mast through another power source, which can drive the inner mast to achieve lifting and lowering movements; it also includes a fork structure, a baffle plate, and a buffer structure;

[0007] The inner mast is connected to a fork structure, and a baffle plate is provided above the rack plate on the inner side of the inner mast. The baffle plate is set perpendicular to the rack plate and blocks the window on the upper part of the inner mast and the outer mast. After the goods are picked up by the forks, the baffle plate prevents the goods from falling from the window because the goods are tilted towards the inner side of the inner mast.

[0008] The inner mast is provided with a buffer structure, which includes elastic elements and an airbag layer; multiple elastic elements are provided on the lower surface of the top plate of the inner mast, and the lower surfaces of the multiple elastic elements are connected to the airbag layer.

[0009] During operation, the airbag layer is inflated, and when the inner gantry descends to its top plate and comes into contact with the upper end of the outer gantry, the airbag layer and elastic elements cushion both, thereby avoiding collision damage.

[0010] As a preferred technical solution of this application, the fork structure includes a left fork and a right fork; and the fork structure is L-shaped, including a connecting arm and fork ends, which are perpendicular to each other, and the left fork and right fork are symmetrically mounted on the crossbar, and the connecting arm is connected to the crossbar.

[0011] As a preferred technical solution of this application, a square groove is provided on the fork end, the square groove is close to the tail of the fork end, and a spring A is provided in the square groove. The spring A is vertically arranged in the groove and the bottom end of the spring A is fixed to the bottom of the square groove. Its upper end is connected to the bottom end of an arc-shaped block. The plane of the arc-shaped block is opposite to the arc surface, and the arc surface is directly opposite the fork tip of the fork end.

[0012] As a preferred technical solution of this application, the outer gantry includes a main frame A and mounting plates. Multiple mounting plates are installed on the main frame from top to bottom and spaced apart from each other. The mounting plates are concave plates, and two first hydraulic cylinders are arranged in the space formed by the grooves of the plates and the main frame as power sources. The hydraulic rod ends of the first hydraulic cylinders are connected to the top plate of the inner gantry, thereby driving the inner gantry to move up and down through the first hydraulic cylinders.

[0013] As a preferred technical solution of this application, the inner mast includes a main frame B and a top plate. The front side of the main frame B is fixedly connected to the fork structure, and the top of the main frame B is connected to the top plate. A long rectangular strip is provided on the outer side of the main frame B from top to bottom. At the same time, a track groove is provided on the inner side of the main frame A opposite to the main frame B. The track groove is adapted to the long rectangular strip. When the main frame B is driven to move up and down by the first hydraulic cylinder, it slides up and down along the track groove.

[0014] As a preferred technical solution of this application, the baffle plate is provided with multiple rectangular windows. The height of the baffle plate is just enough to block the windows of the inner and outer masts. The rectangular windows are evenly distributed on the baffle plate from top to bottom. The rectangular window openings are long and narrow, which effectively prevents goods from falling off.

[0015] This utility model has the following advantages:

[0016] (1) Buffer the collisions and vibrations caused by the vertical movement of the inner gantry;

[0017] Occasionally, goods need to be placed in shelves or containers at a certain height above the ground. At this time, the inner mast moves up and down, which in turn moves the forks up and down. After the goods are placed, the inner mast needs to be lowered and retracted. At this time, the top of the inner mast may collide with the top of the outer mast, which will reduce the service life. Therefore, this solution is designed with a buffer structure consisting of elastic elements and airbag layers to avoid collisions caused by the inner mast moving up and down at the outer mast, thus providing buffering.

[0018] (2) Prevent goods from slipping or falling off;

[0019] Currently, forklifts are used to transport large goods from one location to another. First, the goods are placed on a pallet, and then the forklift forks are inserted into the pallet to place the goods on the forks before the transport begins. However, when the mast tilts forward or backward, the goods may fall through the windows on the upper part of the outer and inner masts. Therefore, this solution uses a baffle with multiple small grid windows to prevent the goods from sliding backward. Attached Figure Description

[0020] Figure 1 This is a first-view structural schematic diagram of the present invention;

[0021] Figure 2 This is a structural schematic diagram of the present invention from a second perspective;

[0022] Figure 3 This is a structural schematic diagram of the present invention from a third-view perspective;

[0023] Figure 4 This is a first-view structural schematic diagram of the inner gantry of this utility model;

[0024] Figure 5 This is a first-view structural schematic diagram of the outer gantry of this utility model;

[0025] Figure 6 This is a schematic diagram of the fork structure of this utility model;

[0026] In the diagram: 1-Outer mast, 2-Inner mast, 3-Elastic element, 4-Airbag layer, 5-Blocking plate, 6-Spring A, 7-Square groove, 8-Arc block, 9-Left fork, 10-Right fork, 11-Fork end, 12-Railway groove, 13-Long rectangular strip, 14-Top plate, 15-First hydraulic cylinder, 16-Second hydraulic cylinder, 17-Main frame A, 18-Main frame B. Detailed Implementation

[0027] The present invention will be further described below with reference to the accompanying drawings, but the scope of protection of the present invention is not limited to the following description.

[0028] It should be noted that the orientation or positional relationship indicated by terms such as "left" and "right" is based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship that the product of this invention is usually placed in during use, or the orientation or positional relationship that is commonly understood by those skilled in the art. Such terms are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0029] It should be noted that, unless otherwise specified, the embodiments and features and technical solutions in the present invention can be combined with each other.

[0030] Therefore, based on the above issues, please refer to Figure 1 This utility model proposes a forklift mast structure to solve the problem.

[0031] See Figures 1-6 The forklift mast structure proposed in this implementation plan includes a baffle plate 5 and a buffer structure;

[0032] Among them, see Figures 1-3 The gantry includes an outer gantry 1 and an inner gantry 2. The inner gantry 2 is inserted into and movably installed with the outer gantry 1. The outer gantry 1 is driven by a power source to tilt the device forward and backward. At the same time, another power source is set on the outer gantry 1 to realize the up and down lifting action of the inner gantry 2.

[0033] Among them, see Figure 1 and Figure 2 The inner mast 2 is equipped with a fork structure. A baffle plate 5 is installed above the rack plate on the inner side of the inner mast 2. The baffle plate 5 is perpendicular to the rack plate and blocks the window on the upper part of the inner mast 2 and the outer mast 1.

[0034] Among them, see Figure 2 and Figure 4 A buffer structure is provided on the inner gantry 2. The buffer structure includes multiple elastic elements 3 and an airbag layer 4. Multiple elastic elements 3 are provided on the lower surface of the top plate 14 of the inner gantry 2. The lower surface of the multiple elastic elements 3 is connected to the airbag layer 4.

[0035] During operation, after the goods are picked up by the forks, the guardrail prevents the goods from falling from the window as the goods tilt towards the inside of the inner mast 2. At the same time, after the airbag layer 4 is inflated, the inner mast 2 descends to its top plate 14 and closes to the upper end of the outer mast 1. The airbag layer 4 and the elastic element 3 cushion both of them, which can prevent the inner and outer masts 1 from colliding and being damaged.

[0036] It should be noted that existing forklifts require the outer mast 1 to tilt forward to bring the forks close to the ground when picking up goods, and then the outer mast 1 tilts backward to fully insert the goods into the forks and fix them for subsequent transportation. However, the goods will slide outward due to inertia at this time, so a blocking structure (such as an upward-pointing tip) is set at the end of the forks. When the goods are tilted towards the operator's cab, it is not conducive to storing some stacked goods or a large number of stacked small bottles or boxes, which may cause the goods to fall or collide. This solution designs a forklift mast structure that uses a baffle 5 to prevent the goods from sliding inward, and also sets up a buffer structure to avoid collisions during mast lifting.

[0037] In this embodiment, see Figures 1-5 For the gantry; the outer gantry 1 includes a main frame A17 and mounting plates. Multiple mounting plates are installed on the main frame from top to bottom and spaced apart from each other. The mounting plates are concave plates. Two first hydraulic cylinders 15 are set in the space formed by the grooves of the plates and the main frame as power sources. The hydraulic rod ends of the first hydraulic cylinders 15 are connected to the top plate 14 of the inner gantry 2, thereby driving the inner gantry 2 to move up and down through the first hydraulic cylinders 15. The inner gantry 2 is composed of a main frame B18 and a top plate 14. The front side of the main frame B18 is fixedly connected to the fork structure, and the top of the main frame B18 is connected to the top plate 14. The outer side of the main frame B18 has a long rectangular strip 13 from top to bottom. At the same time, the inner side of the main frame A17, which is opposite to the main frame B18, has a track groove 12. The track groove 12 is adapted to the long rectangular strip 13. When the main frame B18 moves up and down through the first hydraulic cylinders 15, it slides up and down along the track groove 12.

[0038] It should be noted that when goods are placed in a shelf or container at a certain height above the ground, the first hydraulic cylinder 15 drives the hydraulic rod to move the forks and goods up and down. After the goods are placed in the container when the forks reach the designated height, the inner mast 2 is lowered. At this time, the top of the outer mast 1 and the inner mast 2 may vibrate, causing slight vertical vibrations in the device. The elastic element 3 and the airbag layer 4 buffer the vibrations to avoid adverse vibrations.

[0039] In this embodiment, see Figure 1 and Figure 6For the fork structure; the fork structure includes a left fork 9 and a right fork 10; and the fork structure is L-shaped, including a connecting arm and fork ends 11, which are perpendicular to each other, and the left fork 9 and right fork 10 are symmetrically mounted on the crossbar, and the connecting arm is connected to the crossbar; a square groove 7 is provided on the fork ends 11 of the fork structure, the square groove 7 is close to the tail of the fork ends 11, and a spring A6 is provided in the square groove 7, the spring A6 is vertically installed in the groove and the bottom end of the spring A6 is fixed to the bottom of the square groove 7, and its upper end is connected to the bottom end of an arc-shaped block 8, one side of which is an arc surface and the opposite side of the arc surface is a plane (that is, the limiting block is a quarter-circular plate), the plane of the arc-shaped block 8 is opposite to the arc surface, and the arc surface is directly opposite the fork tip of the fork end 11.

[0040] It should be noted that after the forks pick up the goods, the goods move inward through the arc surface of the arc block 8, and the spring A6 is compressed into the square groove 7. At this time, the arc block 8 is pressed into the groove. When the goods are completely against the forks, the spring A6 returns to its original position, and the arc block 8 is ejected. Its flat surface abuts against the front of the goods, further limiting the goods and preventing them from slipping.

[0041] Furthermore, multiple rectangular windows are provided on the baffle plate 5. The height of the baffle plate 5 is just enough to block the windows of the inner mast 2 and the outer mast 1. The rectangular windows are evenly distributed on the baffle plate 5 from top to bottom.

[0042] It should be noted that, regarding the tilting and retraction of the outer mast 1 and the lifting and lowering of the inner mast 2, the outer mast 1 is hinged to the front end of the forklift via the second hydraulic cylinder 16. First, a second hydraulic cylinder 16 is set on each side of the frame body. The base of the second hydraulic cylinder 16 is fixedly connected to the front side of the forklift. The end of the hydraulic rod of the second hydraulic cylinder 16 is connected to the main frame A17 of the outer mast 1. (Because the second hydraulic cylinder 16 is set at a certain angle, the tilting and retraction of the outer mast 1 is achieved by the extension and retraction of the hydraulic rod. When the second hydraulic cylinder 16 is activated and its hydraulic rod extends forward, since the end of the hydraulic rod is fixed to the main frame A17 of the outer mast 1, it pushes the outer mast 1 to tilt forward. This causes the bottom fork tip in the fork mechanism to insert into the fork slot of the goods. After the goods are forked onto the fork structure, the hydraulic rod is driven to retract and shorten, so that the outer mast 1 tilts back to its original position and the goods are placed on the fork structure.

[0043] Furthermore, it also includes a first hydraulic cylinder 15, which mainly realizes the vertical lifting of the inner mast 2. The first hydraulic cylinder 15 is installed on the back of the outer mast 1. The hydraulic rod end of the first hydraulic cylinder 15 is connected to the top plate 14 of the inner mast 2. By driving the first hydraulic cylinder 15, the hydraulic rod can be extended and shortened in the vertical direction, thereby driving the connected inner mast 2 to move vertically. Since the inner mast 2 is connected to the fork structure, it drives the fork structure to move up and down, thereby transporting the goods to the designated height position for loading and unloading.

[0044] When forklifts are used for short-distance cargo transport, the mast remains stable and does not require tilting during transport. However, when picking up goods, a certain degree of forward and backward tilting is required. The picked-up goods may then slide due to their own weight, which is particularly problematic for stacked goods or large quantities of small bottles or boxes, as the goods may fall or collide with the front of the cab. Furthermore, when the inner mast 2 moves up or down, it is prone to colliding with the outer mast 1 when it reaches its extreme position. Currently, the system does not incorporate a buffer in the slide rails. Components that could have their service life reduced or affect the stability of the overall structure could be damaged. Therefore, this solution uses a baffle plate 5 to prevent goods from slipping off. The baffle plate 5 has multiple small windows to avoid obstructing the operator's view. At the same time, a buffer structure consisting of an elastic element 3 and an airbag layer 4 is provided on the top plate 14 of the inner mast 2 to prevent collisions and vibrations caused by the inner mast 2 rising and falling at the outer mast 1, thus providing effective buffering. In addition, an arc-shaped block 8 structure is provided on the fork structure to limit the goods. The goods are further limited by the cooperation of the spring A6 and the arc-shaped block 8.

[0045] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A forklift mast structure, comprising an outer mast (1) and an inner mast (2); the outer mast (1) is driven by a power source to achieve forward and backward tilting movements, and the outer mast (1) is movably connected to the inner mast (2) via another power source, capable of driving the inner mast (2) to achieve lifting movements; characterized in that: It also includes a fork structure, a baffle (5), and a buffer structure; The inner mast (2) is connected to a fork structure, and a baffle plate (5) is provided above the frame plate on the inner side of the inner mast (2). The baffle plate (5) is perpendicular to the frame plate and blocks the window on the upper part of the inner mast (2) and the outer mast (1). After the goods are picked up by the forks, the baffle plate prevents the goods from falling from the window because the goods are tilted towards the inner side of the inner mast (2). The inner gantry (2) is provided with a buffer structure, which includes an elastic element (3) and an airbag layer (4); the lower surface of the top plate (14) of the inner gantry (2) is provided with multiple elastic elements (3), and the lower surface of the multiple elastic elements (3) is connected to the airbag layer (4). When in operation, the airbag layer (4) is inflated and the inner mast (2) descends to its top plate (14) and closes to the upper end of the outer mast (1). The airbag layer (4) and the elastic element (3) cushion both of them, thereby avoiding collision damage.

2. The forklift mast structure according to claim 1, characterized in that: The fork structure includes a left fork (9) and a right fork (10); and the fork structure is L-shaped, including a connecting arm and a fork end (11), which are perpendicular to each other, and the left fork (9) and the right fork (10) are symmetrically mounted on the crossbar, and the connecting arm is connected to the crossbar.

3. A forklift mast structure according to claim 2, characterized in that: A square groove (7) is provided on the fork end (11). The square groove (7) is close to the tail of the fork end (11), and a spring A (6) is provided in the square groove (7). The spring A (6) is vertically arranged in the groove and the bottom end of the spring A (6) is fixed to the bottom of the square groove (7). Its upper end is connected to the bottom end of an arc block (8). The plane of the arc block (8) is opposite to the arc surface, and the arc surface is directly opposite the fork tip of the fork end (11).

4. A forklift mast structure according to claim 1, characterized in that: The outer gantry (1) includes a main frame A (17) and mounting plates. Multiple mounting plates are installed on the main frame from top to bottom and spaced apart from each other. The mounting plates are concave plates. Two first hydraulic cylinders (15) are set in the space formed by the groove and the main frame as power sources. The hydraulic rod end of the first hydraulic cylinder (15) is connected to the top plate (14) of the inner gantry (2), thereby driving the inner gantry (2) to move up and down through the first hydraulic cylinder (15).

5. A forklift mast structure according to claim 4, characterized in that: The inner mast (2) includes a main frame B (18) and a top plate (14). The front side of the main frame B (18) is fixedly connected to the fork structure, and the top of the main frame B (18) is connected to the top plate (14). A long rectangular strip (13) is provided on the outer side of the main frame B (18) from top to bottom. At the same time, a track groove (12) is provided on the inner side of the main frame A (17) opposite to the main frame B (18). The track groove (12) is adapted to the long rectangular strip (13). When the main frame B (18) is driven to move up and down by the first hydraulic cylinder (15), it slides up and down along the track groove (12).

6. A forklift mast structure according to claim 1, characterized in that: The baffle plate (5) has multiple rectangular windows. The height of the baffle plate (5) is just enough to block the windows of the inner frame (2) and the outer frame (1). The rectangular windows are evenly distributed on the baffle plate (5) from top to bottom.

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