Forklift overhead guard portal anti-pinch device and forklift

Abstract

The utility model relates to the technical field of forklifts, and discloses a forklift overhead guard portal anti-pinch device and a forklift.The forklift overhead guard portal anti-pinch device comprises a detection mechanism arranged at the top end of a forklift body, the detection mechanism comprises an overhead guard stand column, the bottom end of the overhead guard stand column is fixedly connected with the top end of the forklift body, and the top end of the overhead guard stand column is fixedly connected with the top end of the forklift body. An overhead guard is fixedly mounted at the top ends of the overhead guard stand columns; the sleeve is mounted on a front cross beam of the overhead guard and is in sliding connection with the overhead guard; the pressure detection unit is installed in the sleeve and located between the sleeve and a front cross beam of the overhead guard; wherein the pressure detection unit is electrically connected with an electrical system of the forklift and feeds back an extrusion signal to the electrical system of the forklift when the pressure detection unit is extruded so as to cut off power in the backward inclination direction of the portal. The overhead guard has the advantage that the personal safety of an operator between the overhead guard and the portal frame is prevented from being damaged.

Description

Technical Field

[0001] The utility model relates to the technical field of forklifts, and more particularly to an anti-clamping device for a forklift overhead guard frame and a forklift. Background Art

[0002] Forklifts are industrial handling vehicles, which refer to various wheeled handling vehicles used for loading and unloading, stacking and short-distance transportation of palletized goods. They are often used for transporting large objects in warehouses and are usually powered by fuel engines or batteries.

[0003] When operators need to move large goods, forklifts are often used to move goods with large weight and volume. With the advancement of technology, most forklifts on the market now have a mast tilting function, which can change the center of gravity of the goods so that the goods can be placed stably on the forks. Although the mast tilting function can increase the stability of the goods during movement, there is no anti-pinch device between the existing forklift overhead guard and the mast. When the operator stands between the overhead guard and the mast to work, the mast may tilt backward and squeeze the operator, thereby endangering the operator's personal safety. Therefore, its structure needs to be improved. Utility Model Content

[0004] In order to overcome the deficiencies of the prior art, the utility model provides a forklift overhead guard and door frame anti-pinch device and a forklift, which has the advantage of avoiding damage to the personal safety of an operator located between the overhead guard and the door frame.

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

[0006] A forklift overhead guard frame anti-pinch device includes a detection mechanism arranged at the top of a forklift body, the detection mechanism including:

[0007] An overhead guard column, the bottom end of which is fixedly connected to the top end of the forklift body, and an overhead guard is fixedly mounted on the top end of the overhead guard column;

[0008] a sleeve mounted on a front crossbeam of the overhead guard and slidably connected to the overhead guard;

[0009] a pressure detection unit, the pressure detection unit being mounted inside the sleeve and located between the sleeve and the front crossbeam of the overhead guard;

[0010] The pressure detection unit is electrically connected to the forklift electrical system and feeds back an extrusion signal to the forklift electrical system when squeezed, so as to cut off the power in the rearward tilting direction of the mast.

[0011] Preferably, the pressure detection unit is a pressure sensor or a pressure switch, the sleeve is a square metal sleeve and covers the front crossbeam of the overhead guard, and the pressure detection units are installed between the sleeve and the front crossbeam of the overhead guard at equal intervals.

[0012] The utility model also provides a forklift, which comprises the forklift overhead guard frame and door frame anti-clamping device.

[0013] Preferably, the forklift includes an electrical system, a hydraulic system and a tilt cylinder, the electrical system is electrically connected to the pressure detection unit and the hydraulic system, and the hydraulic system is used to control the forward and backward tilting movement of the tilt cylinder.

[0014] Preferably, the forklift comprises:

[0015] A forklift body, wherein fixing blocks are fixedly mounted on both left and right sides of the bottom end of the front of the forklift body;

[0016] A tilting mechanism, the tilting mechanism being arranged inside the fixed block;

[0017] In which, the tilting mechanism includes a fixed shaft, the left and right ends of the fixed shaft are fixedly sleeved with the inside of the fixed block, the outer surface of the fixed shaft is movably sleeved with a rotating block, the front of the rotating block is fixedly installed with a connecting block, the outer surface of the connecting block is fixedly installed with an outer door frame, the outer surface of the outer door frame is fixedly installed with a connecting plate, the interior of the connecting plate is fixedly sleeved with a pulling shaft, the left and right ends of the pulling shaft are movably sleeved with pulling blocks, the outer surface of the pulling block is fixedly installed with a first hydraulic cylinder, the outer surface of the first hydraulic cylinder is fixedly sleeved with a round block, and the other end of the round block is movably sleeved with the inner outer surface of the forklift body.

[0018] Preferably, a second hydraulic cylinder is fixedly mounted on the outer surface of the top end of the outer mast, the bottom end of the second hydraulic cylinder is movably connected to the outer surface of the connecting block, and a lifting block is fixedly mounted on the outer surface of the second hydraulic cylinder.

[0019] Preferably, an inner door frame is fixedly mounted on the other end of the lifting block, and the outer surface of the inner door frame is movably connected to the inside of the outer door frame.

[0020] Preferably, a movable block is fixedly installed on the bottom end of the outer surface of the inner door frame, and the number of the movable blocks is two, and a fixed frame is fixedly sleeved inside the two movable blocks.

[0021] Preferably, a dual-axis motor is fixedly installed between the two movable blocks, and the other end of the output shaft of the dual-axis motor is fixedly sleeved with a rotating shaft, and the outer surface of the rotating shaft is movably sleeved with the inner portion of the movable block.

[0022] Preferably, a screw is fixedly mounted on the other end of the rotating shaft, a moving block is threadedly sleeved on the outer surface of the screw, and a fork is fixedly mounted on the front of the moving block.

[0023] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0024] 1. The utility model provides a detection mechanism at the top of the forklift body. When the pressure detection unit is squeezed, a squeeze signal is fed back to the forklift electrical system. The forklift electrical system cuts off the power in the rearward tilt direction of the mast, thereby preventing the operator from being squeezed between the overhead guard and the mast, thereby preventing the operator from being harmed by the squeeze.

[0025] 2. The utility model sets a pressure detection unit, a first hydraulic cylinder, a pulling shaft and an outer door frame. When the two first hydraulic cylinders are running, the two pulling blocks will be pulled by the two first hydraulic cylinders. At this time, the two pulling blocks will drive the connecting plate to move through the pulling shaft, and then the connecting plate will drive the outer door frame to move. At this time, the outer door frame as a whole will drive the connecting block to rotate with the movable socket joint of the rotating block and the fixed shaft as the axis, thereby increasing the stability of the cargo. In this process, the first hydraulic cylinder will rotate with the axis of the round block. When the outer door frame contacts the sleeve during backward tilting, it will squeeze the pressure detection unit. When the pressure detection unit detects the squeezing signal, the two first hydraulic cylinders will stop running, thereby preventing the operator located between the overhead guard and the door frame from being squeezed and damaged due to the backward tilting of the door frame.

[0026] 3. The utility model is provided with a fixed frame, a dual-axis motor, a screw and a moving block. When the dual-axis motor is running, the two rotating shafts will respectively drive the two screws to rotate. Since the two screws are respectively threadedly connected to the two moving blocks, and since the outer surfaces of the two moving blocks are movably connected to the inner part of the fixed frame, the two screws will drive the two moving blocks to move toward or away from each other during rotation. At this time, the two forks will move toward or away from each other under the drive of the two moving blocks, so that the distance between the two forks can be adjusted according to the size of the cargo. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a schematic structural diagram of the forklift overhead guard mast anti-pinch device of the present invention;

[0028] Figure 2 This is a schematic diagram of the overall structure of the forklift of the present utility model;

[0029] Figure 3 This is a schematic diagram of the back structure of the forklift of the present utility model;

[0030] Figure 4 This is a schematic cross-sectional view of the utility model;

[0031] Figure 5This is a schematic cross-sectional view of the second hydraulic cylinder of the present invention;

[0032] Figure 6 This is a schematic diagram of the cross-sectional structure of the dual-axis motor of the present invention;

[0033] Figure 7 It is a structural schematic diagram of the front crossbeam of the present utility model.

[0034] In the figure: 1. Forklift body; 2. Fixed block; 3. Fixed shaft; 4. Rotating block; 5. Connecting block; 6. Outer mast; 7. Connecting plate; 8. Pulling shaft; 9. Pulling block; 10. First hydraulic cylinder; 11. Round block; 12. Overhead guard column; 13. Overhead guard; 14. Sleeve; 15. Second hydraulic cylinder; 16. Lifting block; 17. Inner mast; 18. Movable block; 19. Fixed frame; 20. Dual-axis motor; 21. Rotating shaft; 22. Screw; 23. Moving block; 24. Fork; 25. Front crossbeam. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0036] like Figures 1 to 7 As shown, the utility model provides a forklift overhead guard frame anti-pinch device and a forklift.

[0037] like Figure 1 As shown, the forklift overhead guard 13 mast anti-pinch device includes a detection mechanism arranged at the top of the forklift body 1, and the detection mechanism includes an overhead guard column 12, a sleeve 14 and a pressure detection unit.

[0038] The bottom end of the overhead guard column 12 is fixedly connected to the top of the forklift body 1, and the overhead guard 13 is fixedly installed on the top of the overhead guard column 12; the sleeve 14 is installed on the front crossbeam 25 of the overhead guard 13 and is slidably connected to the overhead guard 13, and the pressure detection unit is installed inside the sleeve 14 and is located between the sleeve 14 and the front crossbeam 25 of the overhead guard 13.

[0039] The pressure detection unit is electrically connected to the forklift electrical system and feeds back an extrusion signal to the forklift electrical system when squeezed, so as to cut off the power in the rearward tilting direction of the mast.

[0040] The pressure detection unit is a pressure sensor or a pressure switch, and the sleeve 14 is a square metal sleeve 14. Of course, the pressure detection unit can also be a micro switch.

[0041] Preferably, the sleeve 14 covers the front crossbeam 25 of the overhead guard 13, and the pressure detection units are installed at equal intervals between the sleeve 14 and the front crossbeam 25 of the overhead guard 13. Furthermore, the pressure detection units are provided between both ends of the front crossbeam 25 and the sleeve 14. In other words, the sleeve 14 is slidably connected to the front crossbeam 25 of the overhead guard 13, and the length of the sleeve 14 is greater than or equal to the length of the front crossbeam 25 of the overhead guard 13. Thus, by ensuring that the sleeve 14 covers the entire front crossbeam 25 of the overhead guard 13 and that the pressure detection units are installed at equal intervals between the sleeve 14 and the front crossbeam 25 of the overhead guard 13, it is possible to better prevent the mast from tilting backward and injuring workers between the mast and the overhead guard, thereby achieving a pinch-proof function at any position on the front crossbeam 25.

[0042] The forklift includes a tilt cylinder used to drive the forward and backward tilt of the mast. The hydraulic system is used to drive the tilt cylinder. The forklift also includes an electrical system. The electrical system controls the hydraulic system, which in turn controls the tilt cylinder, and ultimately controls the forward and backward tilt of the mast. Specifically, the electrical system can control the flow of hydraulic oil into the rod chamber and rodless chamber of the tilt cylinder through the electromagnetic servo valve, control the movement of the tilt cylinder piston, and thus control the forward and backward tilt of the mast. When the pressure detection unit detects the squeeze signal feedback, the electromagnetic servo valve is controlled to control the flow of hydraulic oil, cut off the power in the backward tilt direction of the mast, and make the mast move only in the forward tilt direction.

[0043] Because the pressure detection unit is mounted inside sleeve 14 and located between it and the front crossbeam 25 of overhead guardrail 13, if the mast tilts backward at an excessive angle, squeezing overhead guardrail 13 or an operator positioned between them, a squeeze signal is fed back to the electrical system. This squeeze signal then controls the hydraulic system, shutting off power to the mast's backward tilt, thus preventing the operator from being squeezed between them and potentially endangering their safety.

[0044] This embodiment further provides a forklift, comprising the forklift overhead guard and mast anti-pinch device described above.

[0045] Preferably, the forklift includes an electrical system, a hydraulic system and a tilt cylinder, the electrical system is electrically connected to the pressure detection unit and the hydraulic system, and the hydraulic system is used to control the forward and backward tilting movement of the tilt cylinder.

[0046] Since the specific structure and connection relationship between the forklift electrical system, hydraulic system and tilt cylinder belong to conventional technical means in this field, they will not be described here in detail.

[0047] Preferably, if Figure 2-Figure 7 As shown, the forklift comprises a forklift body 1 and a tilting mechanism.

[0048] Fixed blocks 2 are fixedly installed on both the left and right sides of the bottom of the front side of the forklift body 1; the tilting mechanism is arranged inside the fixed blocks 2.

[0049] Among them, the tilting mechanism includes a fixed shaft 3, the left and right ends of the fixed shaft 3 are fixedly sleeved with the inside of the fixed block 2, the outer surface of the fixed shaft 3 is movably sleeved with a rotating block 4, the front of the rotating block 4 is fixedly installed with a connecting block 5, the outer surface of the connecting block 5 is fixedly installed with an outer door frame 6, the outer surface of the outer door frame 6 is fixedly installed with a connecting plate 7, the inner part of the connecting plate 7 is fixedly sleeved with a pulling shaft 8, the left and right ends of the pulling shaft 8 are movably sleeved with a pulling block 9, the outer surface of the pulling block 9 is fixedly installed with a first hydraulic cylinder 10, the outer surface of the first hydraulic cylinder 10 is fixedly sleeved with a round block 11, and the other end of the round block 11 is movably sleeved with the inner outer surface of the forklift body 1.

[0050] When the two first hydraulic cylinders 10 are running, their other ends will pull the pulling block 9. At this time, the two pulling blocks 9 will drive the connecting plate 7 to move through the pulling shaft 8. At this time, the connecting plate 7 will drive the outer door frame 6 as a whole to rotate with the movable socket joint of the rotating block 4 and the fixed shaft 3 as the axis.

[0051] Preferably, the pressure detection unit is a pressure sensor. When the outer mast 6 tilts backward as a whole and causes the sleeve 14 to slide, thereby causing the pressure sensor in the sleeve 14 to contact and be squeezed by the front crossbeam 25 of the overhead guard, when the squeezing force generated by the outer mast 6 exceeds a preset value of the pressure sensor, the two first hydraulic cylinders 10 will stop moving.

[0052] Among them, a second hydraulic cylinder 15 is fixedly installed on the outer surface of the top end of the outer door frame 6, the bottom end of the second hydraulic cylinder 15 is movably connected to the outer surface of the connecting block 5, and a lifting block 16 is fixedly installed on the outer surface of the second hydraulic cylinder 15.

[0053] When the second hydraulic cylinder 15 is in operation, the other end of the second hydraulic cylinder 15 drives the lifting block 16 to move upward.

[0054] Among them, the other end of the lifting block 16 is fixedly installed with an inner door frame 17, and the outer surface of the inner door frame 17 is movably connected to the inside of the outer door frame 6.

[0055] When the lifting block 16 moves upward, the inner door frame 17 will move upward along the inside of the outer door frame 6 under the drive of the lifting block 16. Due to the design of the outer door frame 6, the inner door frame 17 will be more stable when moving up and down.

[0056] A movable block 18 is fixedly mounted on the bottom end of the outer surface of the inner door frame 17 . There are two movable blocks 18 , and a fixed frame 19 is fixedly sleeved inside the two movable blocks 18 .

[0057] When the inner door frame 17 moves upward, the movable block 18 will move upward under the drive of the inner door frame 17 , and the movable block 18 will drive the fixed frame 19 to move upward as a whole.

[0058] A dual-axis motor 20 is fixedly installed between the two movable blocks 18 , and a rotating shaft 21 is fixedly sleeved on the other end of the output shaft of the dual-axis motor 20 . The outer surface of the rotating shaft 21 is movably sleeved with the inner portion of the movable block 18 .

[0059] When the dual-axis motor 20 is running, the two rotating shafts 21 will rotate simultaneously.

[0060] A screw rod 22 is fixedly mounted on the other end of the rotating shaft 21 , a moving block 23 is threadedly sleeved on the outer surface of the screw rod 22 , and a fork 24 is fixedly mounted on the front of the moving block 23 .

[0061] When the two rotating shafts 21 rotate, the two screws 22 will rotate driven by the two rotating shafts 21. Since the two screws 22 are respectively threadedly connected with the two moving blocks 23, when the two screws 22 rotate, they will drive the two moving blocks 23 to move toward or away from each other along the inside of the fixed frame 19. At this time, the two forks 24 will move toward or away from each other driven by the two moving blocks 23.

[0062] The working principle and use process of this utility model:

[0063] When the operator needs to increase the stability of the goods during transportation, the operator starts the two first hydraulic cylinders 10 at the same time. At this time, the other ends of the two first hydraulic cylinders 10 will pull the two pulling blocks 9 respectively. At this time, the two pulling blocks 9 will simultaneously drive the pulling shaft 8 to move. At this time, the connecting plate 7 will move under the drive of the pulling shaft 8, and then the connecting plate 7 will drive the outer door frame 6 and the connecting block 5 to move. At this time, the connecting block 5 will drive the rotating block 4 to move. At this time, the rotating block 4 will rotate with the movable socket with the fixed shaft 3 as the axis. In this process, the goods will become inclined under the drive of the outer door frame 6 as a whole. , thereby improving the stability of the cargo. At the same time, the first hydraulic cylinder 10 will rotate with the movable socket of the round block 11 and the forklift body 1 as the axis. When the outer door frame 6 as a whole contacts with the pressure sensor during the backward tilting process, the pressure sensor will be squeezed. When the squeezing force reaches the set value of the pressure sensor, it will be triggered. At this time, the other ends of the two first hydraulic cylinders 10 will stop pulling the two pulling blocks 9, cutting off the power of the outer door frame 6 in the backward tilting direction as a whole, so that the outer door frame 6 as a whole can only move in the forward tilting direction, thereby realizing the function of preventing the door frame from tilting backward at an excessively large angle and avoiding squeezing and injuring the operator located between the overhead guard and the door frame.

[0064] When the operator needs to transport goods of different sizes, the operator starts the dual-axis motor 20, and the two rotating shafts 21 will rotate at the same time. At the same time, the two screws 22 will rotate driven by the two rotating shafts 21. Since the outer surfaces of the two screws 22 are respectively engaged with the internal threads of the two moving blocks 23, when the two screws 22 rotate, they will respectively drive the two moving blocks 23 to move. Since the outer surfaces of the two moving blocks 23 are movably connected to the interior of the fixed frame 19, the two moving blocks 23 will move toward each other along the interior of the fixed frame 19 driven by the two screws 22. At the same time, the two forks 24 will move toward each other driven by the two moving blocks 23, thereby realizing the function of adjusting the distance between the two forks 24 according to the size of the goods.

[0065] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0066] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A forklift overhead guard frame anti-pinch device, characterized in that: The forklift comprises a detection mechanism disposed on the top of the forklift body, the detection mechanism comprising: An overhead guard column, the bottom end of which is fixedly connected to the top end of the forklift body, and an overhead guard is fixedly mounted on the top end of the overhead guard column; a sleeve mounted on a front crossbeam of the overhead guard and slidably connected to the overhead guard; a pressure detection unit, the pressure detection unit being mounted inside the sleeve and located between the sleeve and the front crossbeam of the overhead guard; The pressure detection unit is electrically connected to the electrical system of the forklift and feeds back an extrusion signal to the electrical system of the forklift when squeezed, so as to cut off the power in the rearward tilting direction of the mast.

2. The forklift overhead guard mast anti-pinch device according to claim 1, characterized in that: The pressure detection unit is a pressure sensor or a pressure switch, the sleeve is a square metal sleeve and covers the front crossbeam of the overhead guard, and the pressure detection units are installed between the sleeve and the front crossbeam of the overhead guard at equal intervals.

3. A forklift, characterized in that: The forklift includes the forklift overhead guard frame anti-pinch device according to claim 1 or 2.

4. A forklift according to claim 3, characterized in that: The forklift includes an electrical system, a hydraulic system and a tilt cylinder. The electrical system is electrically connected to a pressure detection unit and the hydraulic system. The hydraulic system is used to control the forward and backward tilting movement of the tilt cylinder.

5. A forklift according to claim 3, characterized in that: Includes: A forklift body, wherein fixing blocks are fixedly mounted on both left and right sides of the bottom end of the front of the forklift body; A tilting mechanism, the tilting mechanism being arranged inside the fixed block; In which, the tilting mechanism includes a fixed shaft, the left and right ends of the fixed shaft are fixedly sleeved with the inside of the fixed block, the outer surface of the fixed shaft is movably sleeved with a rotating block, the front of the rotating block is fixedly installed with a connecting block, the outer surface of the connecting block is fixedly installed with an outer door frame, the outer surface of the outer door frame is fixedly installed with a connecting plate, the interior of the connecting plate is fixedly sleeved with a pulling shaft, the left and right ends of the pulling shaft are movably sleeved with pulling blocks, the outer surface of the pulling block is fixedly installed with a first hydraulic cylinder, the outer surface of the first hydraulic cylinder is fixedly sleeved with a round block, and the other end of the round block is movably sleeved with the inner outer surface of the forklift body.

6. The forklift according to claim 5, characterized in that: A second hydraulic cylinder is fixedly mounted on the outer surface of the top end of the outer mast, the bottom end of the second hydraulic cylinder is movably connected to the outer surface of the connecting block, and a lifting block is fixedly mounted on the outer surface of the second hydraulic cylinder.

7. The forklift according to claim 6, characterized in that: An inner door frame is fixedly mounted on the other end of the lifting block, and an outer surface of the inner door frame is movably connected to the interior of the outer door frame.

8. The forklift according to claim 7, characterized in that: A movable block is fixedly installed on the bottom end of the outer surface of the inner door frame. There are two movable blocks, and a fixed frame is fixedly sleeved inside the two movable blocks.

9. The forklift according to claim 8, characterized in that: A dual-axis motor is fixedly installed between the two movable blocks, and the other end of the dual-axis motor output shaft is fixedly sleeved with a rotating shaft, and the outer surface of the rotating shaft is movably sleeved with the inner portion of the movable block.

10. The forklift according to claim 9, characterized in that: A screw is fixedly mounted on the other end of the rotating shaft, a moving block is threadedly sleeved on the outer surface of the screw, and a fork is fixedly mounted on the front of the moving block.

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