A high-slope lithium-ion forklift with energy recovery

Abstract

The present invention relates to the technical field of forklifts, and specifically to a high-slope lithium-ion forklift with energy recovery, comprising a vehicle body, a gantry and a tilting mechanism, and also comprising a hydraulic cylinder, a lifting frame, a cargo fork, a detection component, a push plate, a speed change component, a hydraulic motor, a generator and a battery. The lower end of the hydraulic cylinder is connected to the gantry, the lifting frame is connected to the upper end of the hydraulic cylinder, the cargo fork is connected to the lifting frame, the detection component is connected to the rear side of the cargo fork, the push plate is connected to the rear side of the detection component, the speed change component is connected to the rear side of the push plate, the hydraulic motor is connected to a side of the speed change component close to the gantry, the hydraulic motor is communicated with the hydraulic cylinder, and the generator is connected to the lower side of the speed change component. The present invention achieves the purpose of improving energy recovery efficiency by arranging a speed change component to change the transmission ratio of the hydraulic motor to the generator according to the weight of the cargo, thereby effectively improving the endurance of the lithium-ion forklift.

Description

Technical Field

[0001] The invention relates to the technical field of forklifts, in particular to a high-slope lithium-ion forklift with recoverable energy. Background Art

[0002] A lithium-ion forklift is a vehicle used for loading and unloading goods and for short-distance transportation. It is powered by lithium batteries. This power supply method makes the forklift clean in terms of energy supply. Therefore, lithium-ion forklifts are widely used in the transportation process of factories.

[0003] When lithium-ion forklifts are transporting precision instruments, in order to reduce the impact of road conditions on the instruments during transportation, the forklift needs to lower the height of the goods after lifting the instruments and then lift them again after transporting them to the designated location. Due to the weight of the instruments themselves, the lifting mechanism needs to consume a lot of energy for height adjustment. Therefore, when instruments are transported in batches, the frequent lifting and lowering of the forklift's working device can easily lead to a decrease in the battery life of the lithium-ion forklift, affecting its use.

[0004] In view of the above problems, some solutions have been proposed in the prior art. For example, a hydraulic motor is set up, and hydraulic oil is injected into the hydraulic motor during the process of lowering the goods. The hydraulic motor is driven to rotate by the weight of the goods. The hydraulic motor is connected to a generator, and the power is transmitted to the generator during the rotation of the hydraulic motor to generate electricity, thereby realizing energy recovery and effectively improving the service life of the lithium-ion forklift. However, during the production process in the factory, the size of the instruments is different, which will cause the weight of the goods to change during the transportation of the lithium-ion forklift. When the goods are lighter, the hydraulic motor rotates slower and the goods can be lowered steadily. When carrying heavier goods, the hydraulic motor rotates faster and the goods descend faster, which can easily cause damage to the goods. If the lowering speed of the fork is reduced by the hydraulic system, the hydraulic system needs to be controlled for support, resulting in limited conversion efficiency between the hydraulic motor and the generator, which limits the improvement in the endurance of the lithium-ion forklift.

[0005] Therefore, an energy-recoverable high-slope lithium-ion forklift is proposed. Summary of the invention

[0006] The purpose of the present invention is to provide an energy-recoverable high-slope lithium-ion forklift, which solves the problem that when the lithium-ion forklift utilizes the gravitational potential energy of the cargo for energy recovery, there is a large difference in energy recovery efficiency due to different cargo weights, which in turn leads to poor effect of improving the endurance of the lithium-ion forklift. By setting a speed change component, the transmission ratio of the hydraulic motor to the generator is changed according to the weight of the cargo, thereby achieving the purpose of improving the energy recovery efficiency. At the same time, the change in the transmission ratio makes the resistance to the rotation of the hydraulic motor driving the generator greater when the cargo is heavier, thereby achieving the goal of reducing the supporting force of the hydraulic system for the output of heavier cargo, thereby ensuring the endurance of the lithium-ion forklift.

[0007] Research shows that the power for lifting and lowering goods accounts for about 40% of the energy consumed in lithium-ion forklift transportation. Lithium-ion forklifts have a lot of gravitational potential energy and regenerative braking energy during operation.

[0008] To achieve the above object, the present invention provides the following technical solutions:

[0009] A high-slope lithium-ion forklift with recoverable energy comprises a vehicle body, a gantry and a tilting mechanism, wherein the gantry is connected to the front side of the vehicle body, the rear end of the tilting mechanism is connected to the vehicle body, the front end of the tilting mechanism is connected to the gantry, and further comprises a hydraulic cylinder, a lifting frame, a fork, a detection assembly, a push plate, a speed change assembly, a hydraulic motor, a generator and a battery, the lower end of the hydraulic cylinder is connected to the gantry, the lifting frame is connected to the upper end of the hydraulic cylinder, the fork is connected to the lifting frame, the detection assembly is connected to the rear side of the fork, the push plate is connected to the rear side of the detection assembly, the speed change assembly is connected to the rear side of the push plate, the hydraulic motor is connected to a side of the speed change assembly close to the gantry, the hydraulic motor is communicated with the hydraulic cylinder, the generator is connected to the lower side of the speed change assembly, and the battery is connected to the generator, when the fork is under pressure, the detection assembly drives the push plate to move backward to squeeze the speed change assembly, and when the speed change assembly is under pressure, the transmission ratio of the hydraulic motor to the generator is changed, and the transmission ratio of the hydraulic motor to the generator is inversely proportional to the compressed weight of the fork.

[0010] Through the above scheme, the setting of the speed change component can effectively change the transmission ratio of the hydraulic motor to the generator, so that the transmission ratio is related to the weight of the goods, thereby achieving the purpose of slowing the speed of the hydraulic motor and fast speed of the generator when the goods are heavy. On the one hand, it effectively increases the power generation, and on the other hand, it reduces the supporting force required by the hydraulic cylinder for lowering heavy goods, thereby achieving the purpose of reducing energy consumption and increasing the service life of lithium-ion forklifts.

[0011] Preferably, the fork includes a tine, a slide plate and a protrusion, the tine is connected to the front end of the lifting frame, the tine is "L" shaped, the slide plate is connected to the upper side of the horizontal section of the tine, the protrusion array is connected to the left and right sides of the slide plate, the protrusions are arranged in an inclined shape, and the protrusions are slidably engaged with the tine.

[0012] Through the above scheme, the protrusions are arranged at an angle, thereby achieving the limitation of the moving direction of the fork teeth, so that the moving direction of the fork teeth is toward the rear and downward, achieving the purpose of driving the goods to move toward the vertical section of the fork teeth, and effectively improving the stability of the goods.

[0013] Preferably, the detection assembly includes a pressure box, a sealing plate, a spring, a connecting pipe, a pressure relief pipe, a pressure relief rod and a pushing member, the pressure box is connected to the rear side of the inner cavity of the fork teeth, the sealing plate is connected to the front side of the pressure box, the spring is connected to the inner cavity of the pressure box, the connecting pipe is connected to the rear side of the pressure box, the pressure relief pipe is connected to the upper side of the pressure box, the pressure relief rod is connected to the upper side of the pressure relief pipe, the pushing member is connected to the rear side of the connecting pipe, the slide plate is "L" shaped, and the rear side of the slide plate is connected to the sealing plate.

[0014] Through the above solution, the rear side of the slide plate is connected to the sealing plate, and then when the slide plate is under pressure, the slide plate can push the sealing plate to move backward, thereby achieving the squeezing of the inner cavity of the pressure box.

[0015] Preferably, the pushing member includes a piston, a fixed frame and a sliding frame, the piston is connected to the inner cavity of the connecting tube, the fixed frame is connected to the lifting frame, the sliding frame is connected to the rear side of the fixed frame, the rear end of the piston abuts against the front end of the sliding frame, the moving distance of the piston is inversely proportional to the moving distance of the pressure relief rod, and the rear side of the sliding frame fits against the push plate.

[0016] Through the above solution, the moving distance of the piston is inversely proportional to the moving distance of the pressure relief rod. After the piston moves and is fixed, the pressure relief rod can adjust the pressure relief space in the pressure box according to the moving distance of the piston.

[0017] Preferably, the outer peripheral surface of the piston is connected to an electromagnet, and the electromagnet is ring-shaped, thereby fixing the position of the piston.

[0018] Preferably, a slot is provided on the lower side of the lifting frame, the connecting pipe is slidably arranged in the slot, and the distance between the left and right sides of the slot is smaller than the distance between the left and right sides of the sliding frame.

[0019] Through the above solution, the connecting pipe is slidably connected to the notch, and further, when the fork moves to adjust the supporting position of the goods, the connecting pipe can pass through the notch and maintain contact with the sliding frame.

[0020] Preferably, the speed change assembly includes an output shaft, an input shaft, a fixed wheel, a movable wheel, a steel belt and a pressure piece, the output shaft is connected to the hydraulic motor, the input shaft is connected to the generator, the two groups of fixed wheels and movable wheels are respectively connected to the output shaft and the input shaft, a steel belt is arranged between the fixed wheel and the movable wheel, and the pressure piece is connected to the movable wheel, thereby, the distance between the movable wheel and the fixed wheel can be adjusted through the pressure piece, thereby achieving the purpose of adjusting the size of the upper and lower sides of the steel belt when rotating around the fixed wheel and the movable wheel.

[0021] Preferably, the pressure-applying member includes a slide, a mounting shell, a tension spring, a limit groove, a limit plate and a slot, the slide is connected to the side of the movable wheel away from the fixed wheel, the mounting shell is sleeved on the outside of the slide, the tension spring is connected to the inner cavity of the mounting shell, the limit groove is opened on the upper and lower sides of the slide, the limit plate is connected to the rear side of the push plate, the slot is opened on the upper and lower sides of the mounting shell, one side of the limit plate is inclined, and the limit plate passes through the slot and fits with the limit groove.

[0022] Through the above scheme, one side of the limit plate is inclined, and as the limit plate moves backward, the limit plate can squeeze the slide to move toward the side away from the fixed wheel and close to the fixed wheel, thereby achieving the purpose of adjusting the distance between the fixed wheel and the movable wheel and changing the up and down transmission ratio of the steel belt.

[0023] Preferably, the liquid inlet of the hydraulic motor is connected to a material pipe, and the material pipe is connected to a one-way valve, so that when the hydraulic cylinder moves downward, the one-way valve connects the hydraulic cylinder with the hydraulic motor.

[0024] Preferably, the push plate includes an upper baffle and a lower baffle, and the upper baffle and the lower baffle are both connected to the left and right sides of the door frame, and the side of the upper baffle away from the door frame is inclined.

[0025] Through the above scheme, the side of the upper baffle away from the door frame is inclined, so that the width of the upper baffle gradually increases from top to bottom. Then, when the detection gradually pushes the sliding frame to fit with the push plate, the surface area of ​​the push plate gradually increases downward, which increases the friction between the sliding frame and the push plate, thereby reducing the downward movement speed of the sliding frame and achieving the purpose of controlling the speed of the cargo descent.

[0026] Compared with the prior art, the present invention has the following beneficial effects:

[0027] 1. The present invention solves the problem that when a lithium-ion forklift utilizes the gravitational potential energy of cargo for energy recovery, the energy recovery efficiency varies greatly due to the different weights of the cargo, which in turn leads to a poor effect on improving the endurance of the lithium-ion forklift. By setting a detection component, when the fork carries cargo, it will feed back the weight of the cargo to the limit plate, and the spacing between the upper movable wheel and the fixed wheel and the lower movable wheel and the fixed wheel is adjusted by the limit plate, thereby achieving the purpose of reducing the transmission ratio of the hydraulic motor to the generator. The reduction in the transmission ratio increases the resistance of the hydraulic motor to drive the generator to rotate, thereby reducing the descending speed of the heavy cargo. At the same time, the number of revolutions of the hydraulic motor to drive the generator to rotate is increased, which increases the power generation of the generator, thereby effectively improving the endurance of the lithium-ion forklift.

[0028] 2. By setting up the speed change component, the transmission ratio of the hydraulic motor to the generator decreases, which will cause the hydraulic motor to drive the generator to rotate more circles when rotating a single circle, effectively increasing the power generation of the generator when carrying heavy goods, and effectively improving the endurance of the lithium-ion forklift. At the same time, when the goods are descending, the detection component will push the sliding frame and the push plate to fit together, and the friction between the sliding frame and the push plate will be increased through the gradually increasing surface area of ​​the push plate. The increase in friction will reduce the gravitational potential energy of the descending goods, thereby reducing the supporting force required for the hydraulic cylinder to control the descending speed of the goods when the goods are descending, reducing the energy consumption of the hydraulic cylinder in the cargo descending link, and improving the endurance of the lithium-ion forklift.

[0029] 3. By setting up a detection component, by setting an inclined protrusion, and making the sliding trajectory of the protrusion and the fork teeth inclined, when the goods exert pressure on the slide to make the slide move downward, the slide moves in an inclined state, thereby driving the goods to move closer to the vertical section of the fork. At this time, the inner wall of the goods is supported by the fork, and the stability of the goods is improved. In the process of transportation, the transportation speed of the truck can be increased, and the energy consumption of the transportation link in the process of a single cruising range of the lithium-ion forklift is effectively reduced, thereby achieving the purpose of improving the working efficiency of the lithium-ion forklift. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0031] Figure 2 It is a structural schematic diagram of the rear view of the mast part of the present invention;

[0032] Figure 3 It is a structural schematic diagram of the fork part of the present invention;

[0033] Figure 4 It is a structural schematic diagram of the detection component part of the present invention;

[0034] Figure 5 It is a structural schematic diagram of the speed change assembly part of the present invention;

[0035] Figure 6 For the present invention Figure 5 A is an enlarged schematic diagram;

[0036] Figure 7 It is a structural schematic diagram of the pressure-applying member of the present invention;

[0037] Figure 8 It is a structural schematic diagram of the push plate part of the present invention.

[0038] In the figure: 1, vehicle body; 2, door frame; 3, tilt mechanism; 4, hydraulic cylinder; 5, lifting frame; 501, notch; 6, fork; 601, fork teeth; 602, slide plate; 603, bump; 7, detection assembly; 701, pressure box; 702, sealing plate; 703, spring; 704, connecting pipe; 705, pressure relief pipe; 706, pressure relief rod; 707, pusher; 7071, piston; 70711, electromagnet; 7072, fixed frame; 7073, sliding frame; 8 , push plate; 801, upper baffle; 802, lower baffle; 9, speed change assembly; 901, output shaft; 902, input shaft; 903, fixed wheel; 904, movable wheel; 905, steel belt; 906, pressure piece; 9061, slide; 9062, mounting shell; 9063, tension spring; 9064, limit groove; 9065, limit plate; 9066, card slot; 10, hydraulic motor; 1001, material tube; 1002, one-way valve; 11, generator; 12, battery. DETAILED DESCRIPTION

[0039] The following is a clear and complete description of the technical solution of the embodiment of the present invention in conjunction with the drawings of the embodiment of the present invention, so that its working state and structural features are more detailed. Obviously, the described embodiment is only a partial embodiment of the present invention, not a complete embodiment. Based on the embodiment of the present invention, other embodiments obtained by ordinary technicians in this field without making any creativity belong to the protection scope of the present invention.

[0040] See also Figures 1 to 8 The present invention provides a high-slope lithium-ion forklift with recoverable energy, and the technical solution is as follows:

[0041] For details, please refer to Figures 1 to 8, a high-slope lithium-ion forklift with energy recovery, comprising a vehicle body 1, a gantry 2 and a tilting mechanism 3, wherein the gantry 2 is connected to the front side of the vehicle body 1, the gantry 2 is rotatably connected to the vehicle body 1, the rear end of the tilting mechanism 3 is connected to the vehicle body 1, the tilting mechanism 3 is fixedly connected to the vehicle body 1, the front end of the tilting mechanism 3 is connected to the gantry 2, the tilting mechanism 3 is fixedly connected to the gantry 2, the tilting mechanism 3 is an oil cylinder, and the angle of the gantry 2 can be adjusted by extending and retracting the oil cylinder, and also comprising a hydraulic cylinder 4, a lifting frame 5, a fork 6, a detection component 7, a push plate 8, a speed change component 9, a hydraulic motor 10, a generator 11 and a battery 12, the lower end of the hydraulic cylinder 4 is connected to the gantry 2, the hydraulic cylinder 4 is fixed to the gantry 2, the lifting frame 5 is connected to the upper end of the hydraulic cylinder 4, and the upper end of the hydraulic cylinder 4 is a power output end, An oil pump is connected to the rear side of the hydraulic cylinder 4, and oil is supplied to the hydraulic cylinder 4 through the oil pump. The fork 6 is connected to the front end surface of the lifting frame 5 near the lower side, the detection component 7 is connected to the rear side of the fork 6, the push plate 8 is connected to the rear side of the detection component 7, the speed change component 9 is connected to the rear side of the push plate 8, the hydraulic motor 10 is connected to the side of the speed change component 9 close to the door frame 2, the hydraulic motor 10 is connected to the hydraulic cylinder 4, the generator 11 is connected to the lower side of the speed change component 9, and the battery 12 is connected to the generator 11. When the fork 6 is under pressure, the detection component 7 drives the push plate 8 to move backward to squeeze the speed change component 9. When the speed change component 9 is under pressure, the transmission ratio of the hydraulic motor 10 to the generator 11 is changed, and the transmission ratio of the hydraulic motor 10 to the generator 11 is inversely proportional to the compressed weight of the fork 6.

[0042] By setting up the hydraulic motor 10, after the oil pump supplies oil to the hydraulic cylinder 4, the output end of the hydraulic cylinder 4 will move upward, thereby lifting the goods. During the transportation process, the height of the goods needs to be lowered. At this time, the oil in the oil pump will flow into the hydraulic motor 10, driving the hydraulic motor 10 to rotate. The hydraulic motor 10 is connected to the generator 11 through the speed change component 9, and then the rotation of the hydraulic motor 10 will drive the generator 11 to rotate, thereby realizing power generation and effectively recovering energy. At the same time, the speed change component 9 reduces the transmission ratio of the hydraulic motor 10 to the generator 11. On the one hand, it can make the generator 11 rotate more circles to increase the power generation of the generator 11. At the same time, it makes the power required for the hydraulic motor 10 to drive the generator 11 to rotate increased, thereby reducing the rotation speed of the hydraulic motor 10, and achieving the purpose of limiting the oil supply of the hydraulic cylinder 4 to the hydraulic motor 10.

[0043] As an embodiment of the present invention, refer to Figure 3 , Figure 4 , Figure 5 and Figure 6The fork 6 includes a fork tine 601, a slide plate 602 and a protrusion 603. The fork tine 601 is connected to the front end of the lifting frame 5, and the fork tine 601 is slidably connected to the lifting frame 5. The fork tine 601 is "L" shaped, and the fork tine 601 is divided into a horizontal section and a vertical section. The slide plate 602 is connected to the upper side of the horizontal section of the fork tine 601, and the slide plate 602 is slidably connected to the fork tine 601. The protrusion 603 is connected to the left and right sides of the slide plate 602 in an array. The protrusion 603 is arranged in an inclined shape, and the protrusion 603 is slidably engaged with the horizontal section of the fork tine 601. When the slide plate 602 is pressed, the slide plate 602 is affected by the connecting slideway between the protrusion 603 and the fork tine 601 and slides in an inclined shape. The detection component 7 includes a pressure box 701, a sealing plate 702, Spring 703, connecting pipe 704, pressure relief pipe 705, pressure relief rod 706 and pushing piece 707, the pressure box 701 is connected to the rear side of the inner cavity of the fork tooth 601, the sealing plate 702 is connected to the front side of the pressure box 701, the pressure box 701 is filled with hydraulic oil, the spring 703 is connected to the inner cavity of the pressure box 701, one end of the spring 703 is connected to the sealing plate 702, the connecting pipe 704 is connected to the rear side of the pressure box 701, the pressure relief pipe 705 is connected to the upper side of the pressure box 701, the pressure relief rod 706 is connected to the upper side of the pressure relief pipe 705, the pushing piece 707 is connected to the rear side of the connecting pipe 704, the slide plate 602 is "L" shaped, the rear side of the slide plate 602 is connected to the sealing plate 702, and then When the plate 602 tilts and moves backward, it squeezes the sealing plate 702, thereby pressurizing the hydraulic oil. The pushing member 707 includes a piston 7071, a fixed frame 7072 and a sliding frame 7073. The piston 7071 is connected to the inner cavity of the connecting pipe 704, and the connecting pipe 704 is connected to the inner cavity of the pressure box 701. When the sealing plate 702 squeezes the inner cavity of the pressure box 701, the oil will flow into the connecting pipe 704, thereby squeezing the piston 7071 to move backward. The fixed frame 7072 is connected to the lifting frame 5, and the fixed frame 7072 is connected to the rear side of the lifting frame 5. The sliding frame 7073 is connected to the rear side of the fixed frame 7072. The sliding frame 7073 is slidably connected to the fixed frame 7072. The rear of the piston 7071 The end of the piston 7071 abuts against the front end of the sliding frame 7073. In the initial state, the rear side of the piston 7071 contacts the front side of the sliding frame 7073. When the piston 7071 moves backward, it pushes the sliding frame 7073 to move backward, and the sliding frame 7073 slides in the fixed frame 7072. The moving distance of the piston 7071 is inversely proportional to the moving distance of the pressure relief rod 706. In the initial state, the end of the pressure relief rod 706 extends into the inner cavity of the pressure relief pipe 705. The outer peripheral surface of the piston 7071 is connected to an electromagnet 70711. The electromagnet 70711 is annular. When the electromagnet 70711 is energized, it generates magnetic force to fix the position in the connecting pipe 704. When lifting the goods, the electromagnet 70711 is fixed to the position of the connecting pipe 704 after a specified time.At this time, the slide plate 602 will continue to push the sealing plate 702 to move, and the pressure relief rod 706 will shrink, and the oil in the pressure box 701 will flow into the pressure relief pipe 705, so that the slide plate 602 drops to be parallel to the upper side of the horizontal end of the fork tine 601, achieving the purpose of stable support. The lower side of the lifting frame 5 is provided with a notch 501, and the connecting pipe 704 is slidably arranged in the notch 501. The distance between the left and right sides of the sliding frame 7073 is greater than the distance between the left and right sides of the notch 501. The adjustable range of the fork 6 is between the left and right sides of the notch 501.

[0044] By setting the detection component 7, when the goods apply pressure to the fork 6, the speed change component 9 can change the transmission ratio of the hydraulic motor 10 to the generator 11 according to the weight of the goods. At the same time, the protrusion 603 is tilted. In the process of the goods pressing the slide plate 602 to move downward, the slide plate 602 will drive the goods to move closer to the vertical end of the fork 6, thereby supporting another point of the goods, achieving the purpose of good cargo fixing effect, and then increasing the speed of the forklift during cargo transportation, thereby achieving the purpose of improving work efficiency.

[0045] As an embodiment of the present invention, refer to Figure 5 , Figure 6 , Figure 7 and Figure 8The speed change assembly 9 includes an output shaft 901, an input shaft 902, a fixed wheel 903, a movable wheel 904, a steel belt 905 and a pressure piece 906. The output shaft 901 is connected to the hydraulic motor 10, and the output shaft 901 is connected to the output end of the hydraulic motor 10. The input shaft 902 is connected to the generator 11, and the input shaft 902 is connected to the input end of the generator 11. Two groups of fixed wheels 903 and movable wheels 904 are respectively connected to the output shaft 901 and the input shaft 902. The two fixed wheels 903 are respectively fixedly connected to the input shaft 902 and the output shaft 901. The two movable wheels 904 are respectively slidably connected to the output shaft 901 and the input shaft 902, and the movable wheel 904 can only slide left and right. The fixed wheels 903 and the movable wheels 904 are respectively connected to the output shaft 901 and the input shaft 902. 04, a steel belt 905 is arranged between the fixed wheel 903 connected to the output shaft 901 and the movable wheel 904, and the spacing value between the fixed wheel 903 and the movable wheel 904 connected to the input shaft 902 is inversely proportional to the spacing value between the fixed wheel 903 and the movable wheel 904. By adjusting the spacing between the fixed wheel 903 and the movable wheel 904 on the output shaft 901 and the spacing between the fixed wheel 903 and the movable wheel 904 connected to the input shaft 902, the size of the upper and lower sides of the steel belt 905 can be adjusted, thereby achieving the purpose of adjusting the transmission ratio. The pressure member 906 is connected to the movable wheel 904, and the pressure member 906 includes a slide 9061, a mounting shell 9062, a tension spring 9063, a limiting groove 9064, a limiting plate 9065 and a card slot 9066. The slide 9061 is connected to the movable The wheel 904 is away from the side of the fixed wheel 903, the slide 9061 is rotatably connected to the movable wheel 904, the mounting shell 9062 is sleeved on the outer side of the slide 9061, the upper mounting shell 9062 is fixed to the door frame 2 through the connecting plate, the tension spring 9063 is connected to the inner cavity of the mounting shell 9062, and the other end of the tension spring 9063 is connected to the movable wheel 904, the limiting groove 9064 is opened on the upper and lower sides of the slide 9061, the limiting plate 9065 is connected to the rear side of the push plate 8, the slot 9066 is opened on the upper and lower sides of the mounting shell 9062, one side of the limiting plate 9065 is inclined, the limiting plate 9065 passes through the slot 9066 and fits with the limiting groove 9064, and the limiting groove 9064 and the limiting plate 9065 The fitting surface is inclined, the liquid inlet of the hydraulic motor 10 is connected to a material pipe 1001, and the material pipe 1001 is connected to a one-way valve 1002. The material outlet of the hydraulic motor 10 is connected to the oil pump through the material pipe 1001. The push plate 8 includes an upper baffle 801 and a lower baffle 802, and the upper baffle 801 and the lower baffle 802 are both connected to the left and right sides of the door frame 2. The side of the upper baffle 801 away from the door frame 2 is inclined, and the surface of the upper baffle 801 gradually increases from bottom to top, so that the sliding frame 7073 is gradually increased in the process of moving downward in contact with the upper baffle 801, so that the fork 6 gradually slows down as it moves downward. At the same time, the upper side of the upper baffle 801 is smaller, which can effectively reduce the obstruction of the driver's field of view.

[0046] By setting the speed change component 9, when the weight of the cargo is light, the distance between the fixed wheel 903 and the movable wheel 904 on the output shaft 901 is large, and the distance between the fixed wheel 903 and the movable wheel 904 on the input shaft 902 is small. At this time, the upper side of the steel belt 905 is small and the lower side is large, and a labor-saving transmission is formed at this time, so that lighter cargo can be lowered. When the weight of the cargo is heavy, the limit plate 9065 pushes the slide 9061 to move through the limit groove 9064, and the slide 9061 on the output shaft 901 moves close to the fixed wheel 903, and the slide 9061 on the input shaft 902 moves close to the fixed wheel 903. The slide 9061 is away from the fixed wheel 903, the fixed wheel 903 on the output shaft 901 and the movable wheel 904 have a smaller spacing, while the fixed wheel 903 on the input shaft 902 and the movable wheel 904 have a larger spacing. At this time, the upper side of the steel belt 905 is larger and the lower side is smaller, thereby forming a laborious transmission, thereby achieving a slow descent of heavier goods. At the same time, when the steel belt 905 is transmitted, the fixed wheel 903 and the movable wheel 904 on the input shaft 902 can rotate more circles, thereby improving the power generation capacity of the generator 11 and improving the energy recovery efficiency.

[0047] When the lithium-ion forklift recycles energy, it mainly utilizes the weight of the cargo to squeeze the hydraulic cylinder 4, so that the oil in the hydraulic cylinder 4 flows into the hydraulic motor 10, driving the hydraulic motor 10 to rotate, and the hydraulic motor 10 is connected to the generator 11, and the generator 11 rotates to generate electricity, thereby realizing energy recovery. However, when the lithium-ion forklift is used to transport cargo, due to the different weights of the cargo, the speed at which the output end of the hydraulic cylinder 4 descends is different. When transporting heavier cargo, the speed at which the output end of the hydraulic cylinder 4 descends is faster, which easily leads to instability in the process of the cargo in the hydraulic cylinder 4 moving downward. In this scheme, by setting a speed change component 9, when the cargo weight is lighter, the transmission ratio of the hydraulic motor 10 to the generator 11 is larger. As the cargo weight increases, the transmission ratio of the hydraulic motor 10 to the generator 11 gradually decreases. At this time, the hydraulic motor 10 needs a greater force to drive the generator 11 to rotate, thereby reducing the rotation speed of the hydraulic motor 10, achieving the purpose of reducing the cargo descent speed, and effectively maintaining the stability of the fork 6 when carrying heavier cargo and falling. At the same time, the number of rotations of the generator 11 is increased, and the power generation of the generator 11 is increased. The specific scheme is as follows;

[0048] In order to adjust the transmission ratio of the hydraulic motor 10 to the generator 11 according to the weight of the goods, the present solution is provided with a detection component 7. When the fork 6 lifts the goods, the goods will first contact the slide plate 602. As the hydraulic cylinder 4 is lifted, the slide plate 602 will push the goods up. At the same time, the weight of the goods acts on the slide plate 602, causing the slide plate 602 to move down along the engaging slideway between the protrusion 603 and the fork teeth 601. The rear side of the slide plate 602 will squeeze the sealing plate 702, causing the sealing plate 702 to move toward the inner cavity of the pressure box 701. The oil in the inner cavity of the pressure chamber flows into the connecting pipe 704, squeezing the piston 7071 to move backward, and the piston 707 The limit plate 9065 is driven to move backwards by the sliding frame 7073 and the push plate 8. The limit plate 9065 moves backwards to squeeze the upper movable wheel 904 to move closer to the upper fixed wheel 903. At this time, a large transmission circle is formed on the upper side of the steel belt 905, and the backward movement of the limit plate 9065 squeezes the lower movable wheel 904 away from the lower fixed wheel 903. At this time, a smaller transmission circle is formed on the lower side of the steel belt 905. When the hydraulic motor 10 rotates, a larger power is required to drive the generator 11 to rotate. Moreover, as the backward movement distance of the limit plate 9065 increases, the resistance of the hydraulic motor 10 to drive the generator 11 to rotate increases.

[0049] In order to improve the stability of goods when transported on a high slope, this solution will make the goods move closer to the vertical section of the fork 6 when transporting goods, so that the vertical section of the fork 6 forms a side support point for the goods. Specifically, by setting an inclined protrusion 603, and making the sliding trajectory of the protrusion 603 and the fork tooth 601 inclined, and then in the process of the goods applying pressure on the slide plate 602 to move the slide plate 602 downward, the slide plate 602 moves in an inclined state, thereby driving the goods to move closer to the vertical section of the fork 6. At this time, the inner wall of the goods has support, and thus during the transportation process, the transportation efficiency can be improved, thereby improving the energy utilization rate of the lithium-ion forklift.

[0050] Although the embodiments of the present invention have been described, it will be apparent to those skilled in the art that changes and modifications may be made to the embodiments to obtain other effects with an understanding of the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An energy-recoverable high-slope lithium-ion forklift, comprising a vehicle body (1), a gantry (2) and a tilting mechanism (3), wherein the gantry (2) is connected to the front side of the vehicle body (1), the rear end of the tilting mechanism (3) is connected to the vehicle body (1), and the front end of the tilting mechanism (3) is connected to the gantry (2), characterized in that: The invention also comprises a hydraulic cylinder (4), a lifting frame (5), a fork (6), a detection component (7), a push plate (8), a speed change component (9), a hydraulic motor (10), a generator (11) and a battery (12), wherein the lower end of the hydraulic cylinder (4) is connected to the door frame (2), the lifting frame (5) is connected to the upper end of the hydraulic cylinder (4), the fork (6) is connected to the lifting frame (5), the detection component (7) is connected to the rear side of the fork (6), the push plate (8) is connected to the rear side of the detection component (7), the speed change component (9) is connected to the rear side of the push plate (8), and the hydraulic motor (10) is connected to a side of the speed change assembly (9) close to the mast (2), the hydraulic motor (10) is connected to the hydraulic cylinder (4), the generator (11) is connected to the lower side of the speed change assembly (9), the battery (12) is connected to the generator (11), when the fork (6) is under pressure, the detection assembly (7) drives the push plate (8) to move backward to squeeze the speed change assembly (9), when the speed change assembly (9) is under pressure, the transmission ratio of the hydraulic motor (10) to the generator (11) is changed, and the transmission ratio of the hydraulic motor (10) to the generator (11) is inversely proportional to the pressure weight of the fork (6).

2. The energy-recoverable high-slope lithium-ion forklift according to claim 1, characterized in that: The cargo fork (6) comprises a fork tine (601), a slide plate (602) and a protrusion (603); the fork tine (601) is connected to the front end of the lifting frame (5); the fork tine (601) is in an "L" shape; the slide plate (602) is connected to the upper side of the horizontal section of the fork tine (601); the protrusion (603) is connected in array to the left and right sides of the slide plate (602); the protrusion (603) is arranged in an inclined shape; and the protrusion (603) is slidably engaged with the fork tine (601).

3. The energy-recoverable high-slope lithium-ion forklift according to claim 2, characterized in that: The detection assembly (7) comprises a pressure box (701), a sealing plate (702), a spring (703), a connecting pipe (704), a pressure relief pipe (705), a pressure relief rod (706) and a pushing member (707); the pressure box (701) is connected to the rear side of the inner cavity of the fork tine (601); the sealing plate (702) is connected to the front side of the pressure box (701); the spring (703) is connected to the pressure box (701); The connecting pipe (704) is connected to the rear side of the pressure box (701), the pressure relief pipe (705) is connected to the upper side of the pressure box (701), the pressure relief rod (706) is connected to the upper side of the pressure relief pipe (705), the pushing member (707) is connected to the rear side of the connecting pipe (704), the slide plate (602) is in an "L" shape, and the rear side of the slide plate (602) is connected to the sealing plate (702).

4. The energy-recoverable high-slope lithium-ion forklift according to claim 3 is characterized in that: The pushing member (707) includes a piston (7071), a fixed frame (7072) and a sliding frame (7073), wherein the piston (7071) is connected to the inner cavity of the connecting tube (704), the fixed frame (7072) is connected to the lifting frame (5), and the sliding frame (7073) is connected to the rear side of the fixed frame (7072). The rear end of the piston (7071) is in contact with the front end of the sliding frame (7073), and the moving distance of the piston (7071) is inversely proportional to the moving distance of the pressure relief rod (706). The rear side of the sliding frame (7073) is in contact with the push plate (8).

5. The energy-recoverable high-slope lithium-ion forklift according to claim 4, characterized in that: The outer peripheral surface of the piston (7071) is connected to an electromagnet (70711), and the electromagnet (70711) is ring-shaped.

6. The energy-recoverable high-slope lithium-ion forklift according to claim 4, characterized in that: A slot (501) is provided on the lower side of the lifting frame (5), and the connecting pipe (704) is slidably arranged in the slot (501), and the distance between the left and right sides of the slot (501) is smaller than the distance between the left and right sides of the sliding frame (7073).

7. The energy-recoverable high-slope lithium-ion forklift according to claim 6, characterized in that: The speed change assembly (9) comprises an output shaft (901), an input shaft (902), a fixed wheel (903), a movable wheel (904), a steel belt (905) and a pressure piece (906); the output shaft (901) is connected to the hydraulic motor (10); the input shaft (902) is connected to the generator (11); two groups of the fixed wheel (903) and the movable wheel (904) are respectively connected to the output shaft (901) and the input shaft (902); a steel belt (905) is provided between the fixed wheel (903) and the movable wheel (904); and the pressure piece (906) is connected to the movable wheel (904).

8. The energy-recoverable high-slope lithium-ion forklift according to claim 7, characterized in that: The pressure member (906) comprises a slide (9061), a mounting shell (9062), a tension spring (9063), a limit groove (9064), a limit plate (9065) and a clamping slot (9066); the slide (9061) is connected to a side of the movable wheel (904) away from the fixed wheel (903); the mounting shell (9062) is sleeved on the outside of the slide (9061); the tension spring (9063) is connected to the mounting shell (9062); The inner cavity of the mounting shell (9062), the limiting groove (9064) is provided on the upper and lower sides of the slide (9061), the limiting plate (9065) is connected to the rear side of the push plate (8), the clamping groove (9066) is provided on the upper and lower sides of the mounting shell (9062), one side of the limiting plate (9065) is inclined, and the limiting plate (9065) passes through the clamping groove (9066) and fits with the limiting groove (9064).

9. The energy-recoverable high-slope lithium-ion forklift according to claim 2, characterized in that: The liquid inlet of the hydraulic motor (10) is connected to a material pipe (1001), and the material pipe (1001) is connected to a one-way valve (1002).

10. The energy-recoverable high-slope lithium-ion forklift according to claim 4, characterized in that: The push plate (8) comprises an upper baffle (801) and a lower baffle (802), wherein the upper baffle (801) and the lower baffle (802) are both connected to the left and right sides of the door frame (2), and the side of the upper baffle (801) away from the door frame (2) is inclined.

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