Follow-up multidirectional anti-tipping device and method for high-lift forklift

Abstract

The invention discloses a follow-up type multidirectional anti-tipping device and method for a high lifting forklift. The device comprises a central flange plate and a plurality of rope-driven telescopic arms which are mounted at a certain angle; the center flange plate is used for fixedly connecting the device with a forklift body, and the rope-driven telescopic arm transmits power through a steel wire rope according to lifting motion of a pallet fork to achieve stretching and retracting. The telescopic arm is in a non-triggering state when the lifting height of the pallet fork is low, and the telescopic arm extends along with the increase of the lifting height when the lifting height of the pallet fork is high. Power comes from self-lifting motion of the pallet fork in the operation process and is transmitted to the telescopic arm after being decelerated through the flexible steel wire rope, and an external power source is not needed. Meanwhile, the phenomenon that the mechanical structure fails due to the fact that the telescopic arm is blocked by foreign matter is prevented in the mode that the safety lock is separated from the flexible steel wire rope. The device has the advantages of simple structure, energy conservation, environmental protection, safety, reliability and the like.

Description

Technical Field

[0001] The invention relates to an anti-rollover device in the field of safe operation of a forklift, and in particular to a follow-up multi-directional anti-rollover device and method for a high-lift forklift. Background Art

[0002] At present, the maximum lifting height of forklifts is as high as more than ten meters. The high lifting height makes the forklift less stable and prone to tipping accidents. Under the premise of not affecting the operating efficiency, taking anti-tipping measures for high-lift forklifts is of great significance to the safe use of forklifts. Summary of the invention

[0003] In view of the problem of safe operation of high-lift forklifts, the purpose of the present invention is to provide a high-lift forklift follow-up multi-directional anti-rollover device and method, which does not affect the working efficiency of the forklift and does not require an additional power source. It has the advantages of simple structure, energy saving and environmental protection, safety and reliability.

[0004] The objectives of the present invention are achieved through the following technical solutions.

[0005] 1. A high-lift forklift follow-up multi-directional anti-rollover device

[0006] Center flange, on which the chassis of the forklift is placed;

[0007] Rope-driven telescopic arms: multiple rope-driven telescopic arms are installed on the side of the center flange at intervals along the circumference. The lead-out rope end of each rope-driven telescopic arm passes through the center flange and is connected to the fork of the forklift. The rope-driven telescopic arm is used to extend / retract according to the movement height of the fork, thereby adjusting the safety area of ​​the forklift.

[0008] Each of the rope-driven telescopic arms comprises a fixed cylinder, a telescopic rod, a supporting wheel, a return spring and a rope-driven telescopic module, one end of the fixed cylinder is mounted on the side of the central flange, a telescopic rod is placed in the fixed cylinder, one end of the telescopic rod is connected to the inner wall of the end of the fixed cylinder close to the central flange through a return spring, a supporting wheel is mounted at the other end of the telescopic rod, and the telescopic rod is movably mounted in the fixed cylinder; a rope-driven telescopic module is mounted in the telescopic rod, the rope-driven telescopic module comprises a flexible steel wire rope, one end of the flexible steel wire rope is led out toward the central flange and serves as a lead-out rope end, and the rope-driven telescopic module is used to adaptively control the sliding position of the telescopic rod in the fixed cylinder through the flexible steel wire rope according to the movement height of the fork.

[0009] The central flange comprises a flange body, the chassis of the forklift is fixedly mounted on the flange body, a central through hole is provided in the middle of the flange body, and the lead-out rope end of each rope-driven telescopic arm passes through the central through hole and is connected to the fork of the forklift.

[0010] The flange body is a cylindrical solid structure.

[0011] The rope-driven telescopic module also includes a moving slider, a buffer spring and a reversing pulley assembly; a slider mounting groove is opened in the middle of the telescopic rod, and the moving slider is placed in the slider mounting groove, and a side of the moving slider close to the center flange is connected to the side wall of the slider mounting groove through the buffer spring, and a side of the moving slider away from the center flange is connected to one end of the flexible steel wire rope, and a reversing pulley assembly is installed at the other end away from the fixed cylinder, and the other end of the flexible steel wire rope extends to the end of the fixed cylinder away from the center flange, and then passes through the reversing pulley assembly, and then extends from the end of the fixed cylinder away from the center flange to the end close to the center flange and passes through, thereby forming a lead-out rope end of the rope-driven telescopic arm; during the rising process of the fork, the moving slider is driven by the flexible steel wire rope to slide in the slider mounting groove toward the end away from the center flange until the moving slider is limited by the slider mounting groove, and then the telescopic rod is driven by the flexible steel wire rope to slide toward the end away from the center flange, so that the overall arm length of the rope-driven telescopic arm becomes longer; after the fork is lowered, the rope-driven telescopic arm is reset after the elastic contraction of the buffer spring and the reset spring.

[0012] The rope-driven telescopic arm also includes a safety lock, which is installed on a side of the moving slider away from the central flange, and one end of the flexible steel wire rope is connected to the safety lock.

[0013] When the tension of the flexible steel wire rope reaches the preset tension threshold of the safety lock, the safety lock actively disengages the flexible steel wire rope.

[0014] The number of the return springs is multiple; the number of the buffer springs is multiple.

[0015] The reversing pulley assembly includes a plurality of reversing pulleys, which are respectively fixedly mounted at the other end of the fixed cylinder away from the center flange. The other end of the flexible steel wire rope extends toward the end of the fixed cylinder away from the center flange, then passes through the plurality of reversing pulleys in sequence, and then extends from the end of the fixed cylinder away from the center flange to the end close to the center flange and passes out, thereby forming a lead-out rope end of the rope-driven telescopic arm.

[0016] The ratio of the lifting height of the forklift's forks to the extension length of the rope-driven telescopic arm is K:1, where K>1.

[0017] 2. Anti-tilt method of a high-lift forklift follow-up multi-directional anti-tilt device

[0018] S1: In the initial stage of lifting, the forklift's fork is lifted upward from the lowest point, driving the flexible steel wire rope to stretch. The flexible steel wire rope is decelerated by the reversing pulley assembly and then stretches the moving slider. The moving slider moves in the slider installation slot toward the end away from the forklift and drives the buffer spring to stretch. During this process, the telescopic rod does not extend;

[0019] S2: In the latter stage of lifting, after the moving slider presses against the end face of the slider installation slot away from the forklift, the buffer spring is in the maximum stretched state. As the fork continues to lift, the flexible steel wire rope continues to stretch the moving slider, and transmits the force to the telescopic rod through the end face of the slider installation slot away from the forklift, so that the telescopic rod moves relative to the fixed cylinder and begins to stretch outward, gradually stretching the reset spring and contacting the ground through the support wheel, gradually expanding the safe operating area of ​​the forklift;

[0020] S3: When the lifting is completed, the forks are at the maximum lifting height, the telescopic rod is at the maximum extension state, the return spring is at the maximum tension state, and the forklift's safe operating area is at the maximum state;

[0021] S4: At the beginning of lowering, the fork moves downward from the highest state, the tension of the flexible wire rope decreases, the telescopic rod gradually contracts under the action of the return spring, the moving slider still presses against the end face of the slider installation slot away from the forklift, and the buffer spring is still in the maximum tension state;

[0022] S5: At the beginning of lowering, the telescopic rod has been fully retracted, the reset spring is in the reset state, and the movable slider begins to move in the slider installation slot toward the end close to the forklift under the action of the buffer spring, and the tension state of the buffer spring gradually weakens;

[0023] S6: When lowering is completed, the telescopic rod is fully retracted, the buffer spring and the return spring are both in a balanced position, and the device returns to its initial state before lifting.

[0024] 3. A forklift

[0025] The forklift comprises the high-lift forklift follow-up multi-directional anti-tilt device, and the chassis of the forklift is fixedly mounted on the high-lift forklift follow-up multi-directional anti-tilt device.

[0026] The present invention has the following beneficial effects:

[0027] 1. When the fork is at a low lifting height, the telescopic rod of the present invention does not work and is in a non-triggered state; when the fork is at a high lifting height, the telescopic rod is in a normal extended working state. This segmented working state improves the working efficiency while ensuring the safe operation of the forklift.

[0028] 2. The present invention adopts a safety lock to prevent the telescopic rod from being blocked by foreign objects during operation, thereby preventing the wire rope or fork structure from failing, thereby ensuring the safety of the device operation.

[0029] 3. The driving of the flexible steel wire rope of the present invention is realized by the lifting movement of the fork, which avoids adding an additional power source, ensures the reliability of the operation, saves energy costs, and realizes the greening of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is an overall diagram of the device in the folded state of the present invention.

[0031] Figure 2 It is a schematic diagram of the structure of the binding cable module of the present invention.

[0032] Figure 3 It is an overall diagram of the device after the target object of the present invention is locked.

[0033] Figure 4 This is the original state of the device of the present invention.

[0034] Figure 5 This is the state of the device of the present invention in the latter stage of lifting / initial stage of lowering.

[0035] Figure 6 It is the state of the device when the lifting of the device of the present invention is completed.

[0036] Figure 7 It is a schematic diagram of the safe working area of ​​a forklift when the device of the present invention is not working.

[0037] Figure 8 It is a schematic diagram of the safe working area of ​​a forklift during the installation process of the present invention.

[0038] Fig. 9 It is a schematic diagram of the safe working area of ​​a forklift when the device of the present invention is fully extended.

[0039] In the figure: 1. center flange, 2. rope-driven telescopic arm, 1-1. flange body, 1-2. mounting through hole, 1-3. center through hole, 2-1. fixing cylinder, 2-2. telescopic rod, 2-3. reset spring, 2-4. slider mounting groove, 2-5. movable slider, 2-6. buffer spring, 2-7. safety lock, 2-8. flexible steel wire rope, 2-9. first pulley, 2-10. second pulley, 2-11. third pulley, 2-12. fourth pulley, 2-13. fifth pulley, 2-14. sixth pulley, 2-15. seventh pulley, 2-16. support wheel fixing seat, 2-17. support wheel. DETAILED DESCRIPTION

[0040] In order to enable those skilled in the art to better understand the scheme of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in the field without making creative work are within the scope of protection of the present invention.

[0041] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. They are only for describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the present invention.

[0042] Example 1

[0043] like Figure 1 and Figure 4 As shown, the present invention provides a high-lift forklift follow-up multi-directional anti-rollover device, comprising:

[0044] A center flange 1, on which a chassis of a forklift is placed, and the chassis of the forklift is fixedly mounted on the center flange 1;

[0045] Rope-driven telescopic arms 2, three rope-driven telescopic arms 2 are installed at equal intervals along the circumference on the side of the center flange 1, the lead-out rope end of each rope-driven telescopic arm 2 passes through the center through hole 1-3 of the center flange 1 and is connected to the fork of the forklift, and the rope-driven telescopic arm 2 is used to extend / retract according to the movement height of the fork, thereby adjusting the safety area range of the forklift.

[0046] like Figure 2 and Figure 3 As shown, the center flange 1 includes a flange body 1-1, which is a cylindrical solid structure with high structural strength. The flange body 1-1 is also provided with four evenly distributed mounting through holes 1-2. The chassis of the forklift is fixedly mounted on the flange body 1-1 by means of fixing bolts and the four mounting through holes 1-2. A center through hole 1-3 is provided in the middle of the flange body 1-1. The lead-out rope end of each rope-driven telescopic arm 2 passes through the center through hole 1-3 and is connected to the fork of the forklift. That is, the flexible steel wire ropes 2-8 of the three rope-driven telescopic arms 2 merge into one rope at the center through hole 1-3 of the center flange 1 and are connected to the fork of the forklift, which can drive the extension and shortening of the three rope-driven telescopic arms 2 as the fork moves up and down.

[0047] like Figure 1 , Figure 2 and Figure 3As shown, each rope-driven telescopic arm 2 includes a fixed cylinder 2-1, a telescopic rod 2-2, a return spring 2-3, a movable slider 2-5, a buffer spring 2-6, a reversing pulley assembly, a flexible steel wire rope 2-8, a support wheel fixing seat 2-16 and a support wheel 2-17; one end of the fixed cylinder 2-1 is mounted on the side of the central flange 1, and the telescopic rod 2-2 is placed in the fixed cylinder 2-1. One end of the telescopic rod 2-2 is connected to the inner wall of the end of the fixed cylinder 2-1 close to the central flange 1 through a pair of return springs 2-3, and the other end of the telescopic rod 2-2 is mounted with the support wheel 2-1 through the support wheel fixing seat 2-16. 7. The telescopic rod 2-2 is movably installed in the fixed cylinder 2-1, that is, the fixed cylinder 2-1 and the telescopic rod 2-2 are connected by a moving pair, and the two can make relative linear motion; a slider installation groove 2-4 is opened in the middle of the telescopic rod 2-2, and the mobile slider 2-5 is placed in the slider installation groove 2-4. The side of the mobile slider 2-5 close to the center flange 1 is connected to the side wall of the slider installation groove 2-4 through a pair of buffer springs 2-6, and the side of the mobile slider 2-5 away from the center flange 1 is connected to one end of the flexible wire rope 2-8. The mobile slider 2-5 and the slider installation groove 2-4 can make relative linear motion. In the balanced position state, there is a gap between the mobile slider 2-5 and the side wall of the slider installation groove 2-4 away from the center flange 1. A reversing pulley assembly is fixedly installed at the other end away from the fixed cylinder 2-1, and the other end of the flexible steel wire rope 2-8 extends to the end of the fixed cylinder 2-1 away from the center flange 1, then passes through the reversing pulley assembly, and then extends from the end of the fixed cylinder 2-1 away from the center flange 1 to the end close to the center flange 1 and passes through, thereby forming the lead-out rope end of the rope-driven telescopic arm 2; the reset spring 2-3 has a greater elastic force than the buffer spring 2-6, so that the buffer spring 2-6 produces elastic deformation before the reset spring 2-3. During the lifting process of the fork, the mobile slider 2-5 is driven by the flexible steel wire rope 2-8 to slide in the slider mounting groove 2-4 toward the end away from the center flange 1, and the buffer spring 2-6 is stretched and deformed until the mobile slider 2-5 is limited by the slider mounting groove 2-4, that is, in the initial stage of the lifting of the fork, the fork pulls the mobile slider 2-5 to move in the slider mounting groove 2-4 through the three-strand flexible steel wire rope 2-8, and the mobile slider 2-5 stretches the buffer spring 2-6 until the mobile slider 2-5 is against the end face of the slider mounting groove. In this process, the pulling force of the buffer spring 2-6 on the telescopic rod 2-2 is less than the friction force exerted on the various parts of the telescopic rod 2-2, and the telescopic rod remains stationary, thereby realizing the non-triggered working state of the device when the fork lifting height is relatively low. Then, the flexible steel wire rope 2-8 drives the telescopic rod 2-2 to slide as a whole toward the end away from the center flange 1, and the reset spring 2-3 produces tensile deformation, so that the overall arm length of the rope-driven telescopic arm 2 becomes longer; after the fork is lowered, the rope-driven telescopic arm 2 is reset after the elastic contraction of the buffer spring 2-6 and the reset spring 2-3.

[0048] The rope-driven telescopic arm 2 also includes a safety lock 2-7, which is installed on a side of the moving slider 2-5 away from the center flange 1, and one end of the flexible steel wire rope 2-8 is connected to the safety lock 2-7. During operation, if the telescopic rod 2-2 is blocked by foreign objects during the extension process and cannot continue to extend, the tension of the flexible steel wire rope 2-8 will increase sharply. When the tension of the flexible steel wire rope 2-8 reaches the preset tension threshold of the safety lock 2-7, the safety lock will actively disengage the flexible steel wire rope 2-8 to achieve the stuck protection operation.

[0049] like Figure 1 and Figure 3 As shown, the reversing pulley assembly includes a first pulley 2-9, a second pulley 2-10, a third pulley 2-11, a fourth pulley 2-12, a fifth pulley 2-13, a sixth pulley 2-14 and a seventh pulley 2-15. The first pulley 2-9, the third pulley 2-11, the sixth pulley 2-14, the seventh pulley 2-15 and the fourth pulley 2-12 are fixed to the left end of the fixed cylinder 2-1 in sequence. The second pulley 2-10 is fixed on the fixed cylinder 2-1 between the first pulley 2-9 and the third pulley 2-11 and the second pulley 2-10 is arranged close to the middle of the fixed cylinder 2-1. The fifth pulley 2-13 is fixed on the fixed cylinder 2-1 between the sixth pulley 2-14 and the fourth pulley 2-12 and the fifth pulley 2-13 is arranged close to the middle of the fixed cylinder 2-1, thereby lengthening the stroke of the flexible steel wire rope 2-8. One end of the flexible steel wire rope 2-8 is fixedly connected to the safety lock 2-7, and then the other end of the flexible steel wire rope 2-8 passes through the first pulley 2-9, the second pulley 2-10, the third pulley 2-11, the fourth pulley 2-12, the fifth pulley 2-13, the sixth pulley 2-14, and the seventh pulley 2-15 in sequence and passes through the end of the fixed cylinder 2-1, thereby forming the lead-out rope end of the rope-driven telescopic arm 2 and entering the center flange 1.

[0050] After the flexible steel wire rope 2-8 passes through the reversing pulley assembly composed of the first pulley 2-9, the second pulley 2-10, the third pulley 2-11, the fourth pulley 2-12, the fifth pulley 2-13, the sixth pulley 2-14 and the seventh pulley 2-15, the ratio of the forklift's fork lifting height to the extension length of the telescopic rod 2-2 of the rope-driven telescopic arm 2 is 4:1, realizing the deceleration effect during the driving process of the flexible steel wire rope 2-8.

[0051] The present invention also proposes an anti-tilting method for a high-lift forklift follow-up multi-directional anti-tilting device, the anti-tilting method comprising the following steps:

[0052] S1: At the initial stage of lifting, the state of the anti-tilt device is as follows: Figure 4 and Figure 7As shown, the forklift's fork is lifted upward from the lowest position, driving the flexible steel wire rope 2-8 to stretch, and the flexible steel wire rope 2-8 is decelerated by the reversing pulley assembly and then stretches the moving slider 2-5, and the moving slider 2-5 moves in the slider installation groove 2-4 toward the end away from the forklift, and drives a pair of buffer springs 2-6 to stretch, and the telescopic rod 2-2 does not extend during this process;

[0053] S2: In the latter stage of lifting, after the moving slider 2-5 presses against the slider installation slot 2-4 away from the end face of the forklift, a pair of buffer springs 2-6 are in the maximum tension state, such as Figure 5 and Figure 8 As shown, as the fork continues to be lifted, the flexible steel wire rope 2-8 continues to stretch the movable slider 2-5, and transmits the force to the telescopic rod 2-2 through the end face of the slider mounting groove 2-4 away from the forklift, so that the telescopic rod 2-2 moves relative to the fixed cylinder 2-1 and begins to stretch outward, gradually stretching a pair of return springs 2-3, and contacting the ground through the support wheel 2-17, gradually expanding the safe operating area of ​​the forklift and improving the stability of the forklift. Figure 6 and Fig. 9 As shown;

[0054] S3: When the lifting is completed, the fork is at the maximum lifting height, the telescopic rod 2-2 is at the maximum extension state, the pair of return springs 2-3 is at the maximum tension state, and the forklift safe operating area is at the maximum state;

[0055] S4: At the beginning of lowering, the fork gradually moves downward from the highest state, the tension of the flexible steel wire rope 2-8 decreases, the telescopic rod 2-2 gradually contracts under the action of a pair of return springs 2-3, the moving slider 2-5 still presses against the end face of the slider installation slot 2-4 away from the forklift, and the buffer spring 2-6 is still in the maximum tension state;

[0056] S5: At the beginning of lowering, the telescopic rod 2-2 has been fully retracted, the pair of reset springs 2-3 are in the reset state, and the movable slider 2-5 begins to move in the slider installation groove 2-4 toward one end of the forklift under the action of the pair of buffer springs 2-6, and the tension state of the pair of buffer springs 2-6 gradually weakens;

[0057] S6: When the lowering is completed, the telescopic rod 2-2 is fully retracted, a pair of buffer springs 2-6 and a pair of return springs 2-3 are both in a balanced position, and the device returns to its initial state before lifting.

[0058] The present invention further provides a forklift, which comprises a high-lift forklift follow-up multi-directional anti-tilt device, and a chassis of the forklift is fixedly mounted on the high-lift forklift follow-up multi-directional anti-tilt device.

[0059] Example 2

[0060] The present invention provides a high-lift forklift follow-up multi-directional anti-rollover device, comprising:

[0061] A center flange 1, on which a chassis of a forklift is placed, and the chassis of the forklift is fixedly mounted on the center flange 1;

[0062] Rope-driven telescopic arms 2, three rope-driven telescopic arms 2 are installed at equal intervals along the circumference on the side of the center flange 1, the lead-out rope end of each rope-driven telescopic arm 2 passes through the center through hole 1-3 of the center flange 1 and is connected to the fork of the forklift, and the rope-driven telescopic arm 2 is used to extend / retract according to the movement height of the fork, thereby adjusting the safety area range of the forklift.

[0063] like Figure 2 and Figure 3 As shown, the center flange 1 includes a flange body 1-1, which is a cylindrical solid structure with high structural strength. The flange body 1-1 is also provided with four evenly distributed mounting through holes 1-2. The chassis of the forklift is fixedly mounted on the flange body 1-1 by means of fixing bolts and the four mounting through holes 1-2. A center through hole 1-3 is provided in the middle of the flange body 1-1. The lead-out rope end of each rope-driven telescopic arm 2 passes through the center through hole 1-3 and is connected to the fork of the forklift. That is, the flexible steel wire ropes 2-8 of the three rope-driven telescopic arms 2 merge into one rope at the center through hole 1-3 of the center flange 1 and are connected to the fork of the forklift, which can drive the extension and shortening of the three rope-driven telescopic arms 2 as the fork moves up and down.

[0064] like Figure 1 , Figure 2 and Figure 3As shown, each rope-driven telescopic arm 2 includes a fixed cylinder 2-1, a telescopic rod 2-2, a return spring 2-3, a movable slider 2-5, a buffer spring 2-6, a reversing pulley assembly, a flexible steel wire rope 2-8, a support wheel fixing seat 2-16 and a support wheel 2-17; one end of the fixed cylinder 2-1 is mounted on the side of the central flange 1, and the telescopic rod 2-2 is placed in the fixed cylinder 2-1. One end of the telescopic rod 2-2 is connected to the inner wall of the end of the fixed cylinder 2-1 close to the central flange 1 through a pair of return springs 2-3, and the other end of the telescopic rod 2-2 is mounted with the support wheel 2-1 through the support wheel fixing seat 2-16. 7. The telescopic rod 2-2 is movably installed in the fixed cylinder 2-1, that is, the fixed cylinder 2-1 and the telescopic rod 2-2 are connected by a moving pair, and the two can make relative linear motion; a slider installation groove 2-4 is opened in the middle of the telescopic rod 2-2, and the mobile slider 2-5 is placed in the slider installation groove 2-4. The side of the mobile slider 2-5 close to the center flange 1 is connected to the side wall of the slider installation groove 2-4 through a pair of buffer springs 2-6, and the side of the mobile slider 2-5 away from the center flange 1 is connected to one end of the flexible wire rope 2-8. The mobile slider 2-5 and the slider installation groove 2-4 can make relative linear motion. In the balanced position state, there is a gap between the mobile slider 2-5 and the side wall of the slider installation groove 2-4 away from the center flange 1. A reversing pulley assembly is fixedly installed at the other end away from the fixed cylinder 2-1, and the other end of the flexible steel wire rope 2-8 extends to the end of the fixed cylinder 2-1 away from the center flange 1, then passes through the reversing pulley assembly, and then extends from the end of the fixed cylinder 2-1 away from the center flange 1 to the end close to the center flange 1 and passes through, thereby forming the lead-out rope end of the rope-driven telescopic arm 2; the reset spring 2-3 has a greater elastic force than the buffer spring 2-6, so that the buffer spring 2-6 produces elastic deformation before the reset spring 2-3. During the lifting process of the fork, the mobile slider 2-5 is driven by the flexible steel wire rope 2-8 to slide in the slider mounting groove 2-4 toward the end away from the center flange 1, and the buffer spring 2-6 is stretched and deformed until the mobile slider 2-5 is limited by the slider mounting groove 2-4, that is, in the initial stage of the lifting of the fork, the fork pulls the mobile slider 2-5 to move in the slider mounting groove 2-4 through the three-strand flexible steel wire rope 2-8, and the mobile slider 2-5 stretches the buffer spring 2-6 until the mobile slider 2-5 is against the end face of the slider mounting groove. In this process, the pulling force of the buffer spring 2-6 on the telescopic rod 2-2 is less than the friction force exerted on the various parts of the telescopic rod 2-2, and the telescopic rod remains stationary, thereby realizing the non-triggered working state of the device when the fork lifting height is relatively low. Then, the flexible steel wire rope 2-8 drives the telescopic rod 2-2 to slide as a whole toward the end away from the center flange 1, and the reset spring 2-3 produces tensile deformation, so that the overall arm length of the rope-driven telescopic arm 2 becomes longer; after the fork is lowered, the rope-driven telescopic arm 2 is reset after the elastic contraction of the buffer spring 2-6 and the reset spring 2-3.

[0065] like Figure 1and Figure 3 As shown, the reversing pulley assembly includes a first pulley 2-9, a second pulley 2-10, a third pulley 2-11, a fourth pulley 2-12, a fifth pulley 2-13, a sixth pulley 2-14 and a seventh pulley 2-15. The first pulley 2-9, the third pulley 2-11, the sixth pulley 2-14, the seventh pulley 2-15 and the fourth pulley 2-12 are fixed to the left end of the fixed cylinder 2-1 in sequence. The second pulley 2-10 is fixed on the fixed cylinder 2-1 between the first pulley 2-9 and the third pulley 2-11 and the second pulley 2-10 is arranged close to the middle of the fixed cylinder 2-1. The fifth pulley 2-13 is fixed on the fixed cylinder 2-1 between the sixth pulley 2-14 and the fourth pulley 2-12 and the fifth pulley 2-13 is arranged close to the middle of the fixed cylinder 2-1, thereby lengthening the stroke of the flexible steel wire rope 2-8. One end of the flexible steel wire rope 2-8 is fixedly connected to the movable slider 2-5, and then the other end of the flexible steel wire rope 2-8 passes through the first pulley 2-9, the second pulley 2-10, the third pulley 2-11, the fourth pulley 2-12, the fifth pulley 2-13, the sixth pulley 2-14, and the seventh pulley 2-15 in sequence and passes through the end of the fixed cylinder 2-1, thereby forming the lead-out rope end of the rope-driven telescopic arm 2 and entering the center flange 1.

[0066] After the flexible steel wire rope 2-8 passes through the reversing pulley assembly composed of the first pulley 2-9, the second pulley 2-10, the third pulley 2-11, the fourth pulley 2-12, the fifth pulley 2-13, the sixth pulley 2-14 and the seventh pulley 2-15, the ratio of the forklift's fork lifting height to the extension length of the telescopic rod 2-2 of the rope-driven telescopic arm 2 is 4:1, realizing the deceleration effect during the driving process of the flexible steel wire rope 2-8.

[0067] The present invention also proposes an anti-tilting method for a high-lift forklift follow-up multi-directional anti-tilting device, the anti-tilting method comprising the following steps:

[0068] S1: In the initial stage of lifting, the forklift's fork is lifted upward from the lowest position, driving the flexible steel wire rope 2-8 to stretch. The flexible steel wire rope 2-8 is decelerated by the reversing pulley assembly and then stretches the moving slider 2-5. The moving slider 2-5 moves in the slider installation groove 2-4 toward the end away from the forklift and drives a pair of buffer springs 2-6 to stretch. During this process, the telescopic rod 2-2 does not extend;

[0069] S2: In the latter stage of lifting, after the moving slider 2-5 presses against the end face of the slider installation slot 2-4 away from the forklift, the pair of buffer springs 2-6 are in the maximum stretched state. As the fork continues to lift, the flexible steel wire rope 2-8 continues to stretch the moving slider 2-5, and transmits the force to the telescopic rod 2-2 through the end face of the slider installation slot 2-4 away from the forklift, so that the telescopic rod 2-2 moves relative to the fixed cylinder 2-1 and begins to stretch outward, gradually stretching the pair of return springs 2-3, and contacting the ground through the support wheel 2-17, gradually expanding the safe operating area of ​​the forklift and improving the stability of the forklift;

[0070] S3: When the lifting is completed, the fork is at the maximum lifting height, the telescopic rod 2-2 is at the maximum extension state, the pair of return springs 2-3 is at the maximum tension state, and the forklift safe operating area is at the maximum state;

[0071] S4: At the beginning of lowering, the fork gradually moves downward from the highest state, the tension of the flexible steel wire rope 2-8 decreases, the telescopic rod 2-2 gradually contracts under the action of a pair of return springs 2-3, the moving slider 2-5 still presses against the end face of the slider installation slot 2-4 away from the forklift, and the buffer spring 2-6 is still in the maximum tension state;

[0072] S5: At the beginning of lowering, the telescopic rod 2-2 has been fully retracted, the pair of reset springs 2-3 are in the reset state, and the movable slider 2-5 begins to move in the slider installation groove 2-4 toward one end of the forklift under the action of the pair of buffer springs 2-6, and the tension state of the pair of buffer springs 2-6 gradually weakens;

[0073] S6: When the lowering is completed, the telescopic rod 2-2 is fully retracted, a pair of buffer springs 2-6 and a pair of return springs 2-3 are both in a balanced position, and the device returns to its initial state before lifting.

[0074] The present invention further provides a forklift, which comprises a high-lift forklift follow-up multi-directional anti-tilt device, and a chassis of the forklift is fixedly mounted on the high-lift forklift follow-up multi-directional anti-tilt device.

[0075] Example 3

[0076] The present invention provides a high-lift forklift follow-up multi-directional anti-rollover device, comprising:

[0077] A center flange 1, on which a chassis of a forklift is placed, and the chassis of the forklift is fixedly mounted on the center flange 1;

[0078] Rope-driven telescopic arms 2, four rope-driven telescopic arms 2 are installed at equal intervals along the circumference on the side of the center flange 1, the lead-out rope end of each rope-driven telescopic arm 2 passes through the center through hole 1-3 of the center flange 1 and is connected to the fork of the forklift, and the rope-driven telescopic arms 2 are used to extend / retract according to the movement height of the fork, thereby adjusting the safety area range of the forklift.

[0079] like Figure 2 and Figure 3 As shown, the center flange 1 includes a flange body 1-1, which is a cylindrical solid structure with high structural strength. The flange body 1-1 is also provided with four evenly distributed mounting holes 1-2. The chassis of the forklift is fixedly mounted on the flange body 1-1 by means of fixing bolts and the four mounting holes 1-2. A center through hole 1-3 is provided in the middle of the flange body 1-1. The lead-out rope end of each rope-driven telescopic arm 2 passes through the center through hole 1-3 and is connected to the fork of the forklift. That is, the three flexible steel wire ropes 2-8 of the rope-driven telescopic arms 2 are combined into one rope at the center through hole 1-3 of the center flange 1 and connected to the fork of the forklift, which can drive the extension and shortening of the four rope-driven telescopic arms 2 as the fork moves up and down.

[0080] like Figure 1 , Figure 2 and Figure 3As shown, each rope-driven telescopic arm 2 includes a fixed cylinder 2-1, a telescopic rod 2-2, a return spring 2-3, a movable slider 2-5, a buffer spring 2-6, a reversing pulley assembly, a flexible steel wire rope 2-8, a support wheel fixing seat 2-16 and a support wheel 2-17; one end of the fixed cylinder 2-1 is mounted on the side of the central flange 1, and the telescopic rod 2-2 is placed in the fixed cylinder 2-1. One end of the telescopic rod 2-2 is connected to the inner wall of the end of the fixed cylinder 2-1 close to the central flange 1 through a pair of return springs 2-3, and the other end of the telescopic rod 2-2 is mounted with the support wheel 2-1 through the support wheel fixing seat 2-16. 7. The telescopic rod 2-2 is movably installed in the fixed cylinder 2-1, that is, the fixed cylinder 2-1 and the telescopic rod 2-2 are connected by a moving pair, and the two can make relative linear motion; a slider installation groove 2-4 is opened in the middle of the telescopic rod 2-2, and the mobile slider 2-5 is placed in the slider installation groove 2-4. The side of the mobile slider 2-5 close to the center flange 1 is connected to the side wall of the slider installation groove 2-4 through a pair of buffer springs 2-6, and the side of the mobile slider 2-5 away from the center flange 1 is connected to one end of the flexible wire rope 2-8. The mobile slider 2-5 and the slider installation groove 2-4 can make relative linear motion. In the balanced position state, there is a gap between the mobile slider 2-5 and the side wall of the slider installation groove 2-4 away from the center flange 1. A reversing pulley assembly is fixedly installed at the other end away from the fixed cylinder 2-1, and the other end of the flexible steel wire rope 2-8 extends to the end of the fixed cylinder 2-1 away from the center flange 1, then passes through the reversing pulley assembly, and then extends from the end of the fixed cylinder 2-1 away from the center flange 1 to the end close to the center flange 1 and passes through, thereby forming the lead-out rope end of the rope-driven telescopic arm 2; the reset spring 2-3 has a greater elastic force than the buffer spring 2-6, so that the buffer spring 2-6 produces elastic deformation before the reset spring 2-3. During the lifting process of the fork, the mobile slider 2-5 is driven by the flexible steel wire rope 2-8 to slide in the slider mounting groove 2-4 toward the end away from the center flange 1, and the buffer spring 2-6 is stretched and deformed until the mobile slider 2-5 is limited by the slider mounting groove 2-4. That is, in the initial stage of the lifting of the fork, the fork pulls the mobile slider 2-5 to move in the slider mounting groove 2-4 through four flexible steel wire ropes 2-8, and the mobile slider 2-5 stretches the buffer spring 2-6 until the mobile slider 2-5 is against the end face of the slider mounting groove. In this process, the pulling force of the buffer spring 2-6 on the telescopic rod 2-2 is less than the friction force exerted on the various parts of the telescopic rod 2-2, and the telescopic rod remains stationary, thereby realizing the non-triggered working state of the device when the fork lifting height is relatively low. Then, the flexible steel wire rope 2-8 drives the telescopic rod 2-2 to slide as a whole toward the end away from the center flange 1, and the reset spring 2-3 produces tensile deformation, so that the overall arm length of the rope-driven telescopic arm 2 becomes longer; after the fork is lowered, the rope-driven telescopic arm 2 is reset after the elastic contraction of the buffer spring 2-6 and the reset spring 2-3.

[0081] The rope-driven telescopic arm 2 also includes a safety lock 2-7, which is installed on a side of the moving slider 2-5 away from the center flange 1, and one end of the flexible steel wire rope 2-8 is connected to the safety lock 2-7. During operation, if the telescopic rod 2-2 is blocked by foreign objects during the extension process and cannot continue to extend, the tension of the flexible steel wire rope 2-8 will increase sharply. When the tension of the flexible steel wire rope 2-8 reaches the preset tension threshold of the safety lock 2-7, the safety lock will actively disengage the flexible steel wire rope 2-8 to achieve the stuck protection operation.

[0082] like Figure 1 and Figure 3 As shown, the reversing pulley assembly includes a first pulley 2-9, a second pulley 2-10, a third pulley 2-11, a fourth pulley 2-12, a fifth pulley 2-13, a sixth pulley 2-14 and a seventh pulley 2-15. The first pulley 2-9, the third pulley 2-11, the sixth pulley 2-14, the seventh pulley 2-15 and the fourth pulley 2-12 are fixed to the left end of the fixed cylinder 2-1 in sequence. The second pulley 2-10 is fixed on the fixed cylinder 2-1 between the first pulley 2-9 and the third pulley 2-11 and the second pulley 2-10 is arranged close to the middle of the fixed cylinder 2-1. The fifth pulley 2-13 is fixed on the fixed cylinder 2-1 between the sixth pulley 2-14 and the fourth pulley 2-12 and the fifth pulley 2-13 is arranged close to the middle of the fixed cylinder 2-1, thereby lengthening the stroke of the flexible steel wire rope 2-8. One end of the flexible steel wire rope 2-8 is fixedly connected to the safety lock 2-7, and then the other end of the flexible steel wire rope 2-8 passes through the first pulley 2-9, the second pulley 2-10, the third pulley 2-11, the fourth pulley 2-12, the fifth pulley 2-13, the sixth pulley 2-14, and the seventh pulley 2-15 in sequence and passes through the end of the fixed cylinder 2-1, thereby forming the lead-out rope end of the rope-driven telescopic arm 2 and entering the center flange 1.

[0083] After the flexible steel wire rope 2-8 passes through the reversing pulley assembly composed of the first pulley 2-9, the second pulley 2-10, the third pulley 2-11, the fourth pulley 2-12, the fifth pulley 2-13, the sixth pulley 2-14 and the seventh pulley 2-15, the ratio of the forklift's fork lifting height to the extension length of the telescopic rod 2-2 of the rope-driven telescopic arm 2 is 4:1, realizing the deceleration effect during the driving process of the flexible steel wire rope 2-8.

[0084] The present invention also proposes an anti-tilting method for a high-lift forklift follow-up multi-directional anti-tilting device, the anti-tilting method comprising the following steps:

[0085] S1: In the initial stage of lifting, the forklift's fork is lifted upward from the lowest position, driving the flexible steel wire rope 2-8 to stretch. The flexible steel wire rope 2-8 is decelerated by the reversing pulley assembly and then stretches the moving slider 2-5. The moving slider 2-5 moves in the slider installation groove 2-4 toward the end away from the forklift and drives a pair of buffer springs 2-6 to stretch. During this process, the telescopic rod 2-2 does not extend;

[0086] S2: In the latter stage of lifting, after the moving slider 2-5 presses against the end face of the slider installation slot 2-4 away from the forklift, the pair of buffer springs 2-6 are in the maximum stretched state. As the fork continues to lift, the flexible steel wire rope 2-8 continues to stretch the moving slider 2-5, and transmits the force to the telescopic rod 2-2 through the end face of the slider installation slot 2-4 away from the forklift, so that the telescopic rod 2-2 moves relative to the fixed cylinder 2-1 and begins to stretch outward, gradually stretching the pair of return springs 2-3, and contacting the ground through the support wheel 2-17, gradually expanding the safe operating area of ​​the forklift and improving the stability of the forklift;

[0087] S3: When the lifting is completed, the fork is at the maximum lifting height, the telescopic rod 2-2 is at the maximum extension state, the pair of return springs 2-3 is at the maximum tension state, and the forklift safe operating area is at the maximum state;

[0088] S4: At the beginning of lowering, the fork gradually moves downward from the highest state, the tension of the flexible steel wire rope 2-8 decreases, the telescopic rod 2-2 gradually contracts under the action of a pair of return springs 2-3, the moving slider 2-5 still presses against the end face of the slider installation slot 2-4 away from the forklift, and the buffer spring 2-6 is still in the maximum tension state;

[0089] S5: At the beginning of lowering, the telescopic rod 2-2 has been fully retracted, the pair of reset springs 2-3 are in the reset state, and the movable slider 2-5 begins to move in the slider installation groove 2-4 toward one end of the forklift under the action of the pair of buffer springs 2-6, and the tension state of the pair of buffer springs 2-6 gradually weakens;

[0090] S6: When the lowering is completed, the telescopic rod 2-2 is fully retracted, a pair of buffer springs 2-6 and a pair of return springs 2-3 are both in a balanced position, and the device returns to its initial state before lifting.

[0091] The present invention further provides a forklift, which comprises a high-lift forklift follow-up multi-directional anti-tilt device, and a chassis of the forklift is fixedly mounted on the high-lift forklift follow-up multi-directional anti-tilt device.

[0092] The preferred embodiments of the present invention are described in detail above in conjunction with the accompanying drawings. However, the present invention is not limited to the specific details in the above embodiments. Within the technical concept of the present invention, a variety of simple modifications can be made to the technical solution of the present invention, and these simple modifications all belong to the protection scope of the present invention.

[0093] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present invention will not further describe various possible combinations.

[0094] In addition, various embodiments of the present invention may be arbitrarily combined, and as long as they do not violate the concept of the present invention, they should also be regarded as the contents disclosed by the present invention.

Claims

1. A high-lift forklift follow-up multi-directional anti-tilt device, characterized in that: include: A center flange (1), on which a chassis of a forklift is placed; A rope-driven telescopic arm (2), wherein a plurality of rope-driven telescopic arms (2) are installed at intervals along the circumference on the side of the central flange (1), and the lead-out rope end of each rope-driven telescopic arm (2) passes through the central flange (1) and is connected to the fork of the forklift. The rope-driven telescopic arm (2) is used to extend / retract according to the movement height of the fork, thereby adjusting the safety area of ​​the forklift; Each of the rope-driven telescopic arms (2) comprises a fixed cylinder (2-1), a telescopic rod (2-2), a support wheel (2-17), a return spring (2-3) and a rope-driven telescopic module. One end of the fixed cylinder (2-1) is mounted on the side of the central flange (1). The telescopic rod (2-2) is placed in the fixed cylinder (2-1). One end of the telescopic rod (2-2) is connected to the inner wall of the end of the fixed cylinder (2-1) close to the central flange (1) through the return spring (2-3). The other end of the telescopic rod (2-2) is connected to the inner wall of the end of the fixed cylinder (2-1) close to the central flange (1). A support wheel (2-17) is installed, and the telescopic rod (2-2) is movably installed in the fixed cylinder (2-1); a rope-driven telescopic module is installed in the telescopic rod (2-2), and the rope-driven telescopic module includes a flexible steel wire rope (2-8), one end of the flexible steel wire rope (2-8) is led out in the direction of the central flange (1) and serves as the lead-out rope end, and the rope-driven telescopic module is used to adaptively control the sliding position of the telescopic rod (2-2) in the fixed cylinder (2-1) through the flexible steel wire rope (2-8) according to the moving height of the fork.

2. The high-lift forklift follow-up multi-directional anti-tilt device according to claim 1 is characterized in that: The central flange (1) comprises a flange body (1-1), the chassis of the forklift is fixedly mounted on the flange body (1-1), a central through hole (1-3) is provided in the middle of the flange body (1-1), and the lead-out rope end of each rope-driven telescopic arm (2) passes through the central through hole (1-3) and is connected to the fork of the forklift.

3. The high lift forklift follow-up multi-directional anti-tilt device according to claim 1, characterized in that: The rope-driven telescopic module also includes a movable slider (2-5), a buffer spring (2-6) and a reversing pulley assembly; a slider installation groove (2-4) is provided in the middle of the telescopic rod (2-2), the movable slider (2-5) is placed in the slider installation groove (2-4), a side of the movable slider (2-5) close to the center flange (1) is connected to the side wall of the slider installation groove (2-4) through the buffer spring (2-6), a side of the movable slider (2-5) away from the center flange (1) is connected to one end of the flexible steel wire rope (2-8), a reversing pulley assembly is installed at the other end away from the fixed cylinder (2-1), the other end of the flexible steel wire rope (2-8) extends to the end of the fixed cylinder (2-1) away from the center flange (1), and then passes through the reversing pulley The component then extends from the end of the fixed cylinder (2-1) away from the center flange (1) to the end close to the center flange (1) and passes through, thereby forming the lead-out rope end of the rope-driven telescopic arm (2); during the ascending process of the fork, the flexible steel wire rope (2-8) drives the movable slider (2-5) to slide in the slider installation groove (2-4) toward the end away from the center flange (1) until the movable slider (2-5) is limited by the slider installation groove (2-4), and then the flexible steel wire rope (2-8) drives the telescopic rod (2-2) as a whole to slide toward the end away from the center flange (1), so that the overall arm length of the rope-driven telescopic arm (2) becomes longer; after the fork is lowered, the rope-driven telescopic arm (2) is reset after the elastic contraction of the buffer spring (2-6) and the reset spring (2-3).

4. The high lift forklift follow-up multi-directional anti-tilt device according to claim 3 is characterized in that: The rope-driven telescopic arm (2) also includes a safety lock (2-7), which is installed on a side of the movable slider (2-5) away from the central flange (1), and one end of the flexible steel wire rope (2-8) is connected to the safety lock (2-7).

5. The high lift forklift follow-up multi-directional anti-tilt device according to claim 4, characterized in that: When the tension of the flexible steel wire rope (2-8) reaches a preset tension threshold of the safety lock (2-7), the safety lock actively disengages the flexible steel wire rope (2-8).

6. The high lift forklift follow-up multi-directional anti-tilt device according to claim 3, characterized in that: The number of the return springs (2-3) is multiple; the number of the buffer springs (2-6) is multiple.

7. The high lift forklift follow-up multi-directional anti-tilt device according to claim 3, characterized in that: The reversing pulley assembly comprises a plurality of reversing pulleys, which are respectively fixedly mounted at the other end away from the fixed cylinder (2-1). The other end of the flexible steel wire rope (2-8) extends toward the end of the fixed cylinder (2-1) away from the center flange (1), then passes through the plurality of reversing pulleys in sequence, and then extends from the end of the fixed cylinder (2-1) away from the center flange (1) to the end close to the center flange (1) and passes out, thereby forming a lead-out rope end of the rope-driven telescopic arm (2).

8. The high lift forklift follow-up multi-directional anti-tilt device according to claim 1, characterized in that: The ratio of the lifting height of the forklift's cargo fork to the extension length of the rope-driven telescopic arm (2) is K:1, where K>1.

9. The anti-rollover method of the high-lift forklift follow-up multi-directional anti-rollover device according to claim 1, characterized in that: The anti-tilt method comprises the following steps: S1: In the initial stage of lifting, the forklift's cargo fork is lifted upward from the lowest position, driving the flexible steel wire rope (2-8) to stretch, and the flexible steel wire rope (2-8) is decelerated by the reversing pulley assembly and then stretches the moving slider (2-5), and the moving slider (2-5) moves in the slider installation groove (2-4) toward the end away from the forklift, and drives the buffer spring (2-6) to stretch, and the telescopic rod (2-2) does not extend during this process; S2: In the latter stage of lifting, after the moving slider (2-5) presses against the end face of the slider installation groove (2-4) away from the forklift, the buffer spring (2-6) is in the maximum tension state. As the forklift continues to be lifted, the flexible steel wire rope (2-8) continues to stretch the moving slider (2-5), and transmits force to the telescopic rod (2-2) through the end face of the slider installation groove (2-4) away from the forklift, so that the telescopic rod (2-2) moves relative to the fixed cylinder (2-1) and begins to stretch outward, gradually stretching the return spring (2-3), and contacting the ground through the support wheel (2-17), gradually expanding the safe operating area of ​​the forklift; S3: When the lifting is completed, the fork is at the maximum lifting height, the telescopic rod (2-2) is at the maximum extension state, the return spring (2-3) is at the maximum tension state, and the forklift safe operating area is at the maximum state; S4: At the beginning of lowering, the fork gradually moves downward from the highest state, the tension of the flexible steel wire rope (2-8) decreases, the telescopic rod (2-2) gradually contracts under the action of the return spring (2-3), the moving slider (2-5) still presses against the slider installation groove (2-4) away from the end face of the forklift, and the buffer spring (2-6) is still in the maximum tension state; S5: At the beginning of lowering, the telescopic rod (2-2) has been completely retracted, the reset spring (2-3) is in the reset state, and the movable slider (2-5) begins to move in the slider installation groove (2-4) toward one end of the forklift under the action of the buffer spring (2-6), and the tension state of the buffer spring (2-6) gradually weakens; S6: When the lowering is completed, the telescopic rod (2-2) is completely retracted, the buffer spring (2-6) and the return spring (2-3) are both in a balanced position state, and the device returns to the initial state before lifting.

10. A forklift, characterized in that: The forklift comprises the high-lift forklift follow-up multi-directional anti-rollover device according to claim 1, and the chassis of the forklift is fixedly mounted on the high-lift forklift follow-up multi-directional anti-rollover device.

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