Forward-moving type forklift lifting system capable of achieving buffering of high-lifting portal frame system

Abstract

The invention discloses a forward-moving type forklift lifting system for achieving buffering of a high lifting portal frame system. The forward-moving type forklift lifting system comprises a controller, a telescopic buffering assembly and a lifting buffering assembly. The controller is mounted on a frame of the forklift; the telescopic buffer assembly comprises a telescopic signal receiving module and a telescopic signal transmitting module; the lifting buffer assembly comprises a lifting signal receiving module and a lifting signal transmitting module. By arranging the telescopic buffering assembly and the lifting buffering assembly, system buffering of a lifting system of the forklift is achieved, speed reduction buffering can be conducted on the forklift portal frame or the side shifter before the forklift portal frame or the side shifter moves to the limiting position, impact and vibration generated when the forklift portal frame or the side shifter moves to the limiting position are reduced, and then the safety of goods can be effectively protected; mechanical abrasion and hydraulic impact of equipment are reduced, and the service life of the forklift is prolonged.

Description

Technical Field

[0001] The invention relates to the technical field of forklift control, and in particular to a forward-moving forklift lifting system that realizes buffering of a high-lifting gantry system. Background Art

[0002] In the fields of logistics warehousing and industrial production, reach truck operation is an important material handling tool, and its performance and safety directly affect work efficiency and operational safety. In high-lifting operations, due to the increase in cargo weight and lifting height, the gantry is prone to greater impact and vibration during the lifting and lowering process, which not only affects the stability of the cargo and the comfort of the operator, but may also cause damage and failure of the equipment. In addition, during the forward and retracting process of the forklift, if there is no effective buffering control, it is also prone to impact and instability. Therefore, it is of great significance to design a reach truck lifting system that realizes system buffering.

[0003] At present, most of the buffer systems for forklift gantry operations are equipped with buffer cylinders at both ends of lifting and retracting, and the impact energy is absorbed by the compression and release of the hydraulic oil in the cylinder. However, the buffering effect is not significant and does not meet the design concept of the high lifting gantry. If there is no stable buffer for the high lifting gantry, it will have a certain degree of impact on the stability and safety of the goods. At the same time, it will also increase the mechanical wear and hydraulic shock of the equipment, thereby reducing the service life of the forklift. Summary of the invention

[0004] In view of this, the present invention provides a reach-forklift lifting system that realizes high-lift gantry system buffering, which can provide stable buffering and ensure the safety of goods. At the same time, it can also reduce mechanical wear and hydraulic shock of the equipment and extend the service life of the forklift.

[0005] To achieve the above object, the present invention provides the following technical solutions: A forward-moving forklift lifting system for realizing high-lifting gantry system buffering comprises: a controller, a telescopic buffer component and a lifting buffer component.

[0006] Among them, the controller is installed on the frame of the forklift; the telescopic buffer assembly includes a telescopic signal receiving module and a telescopic signal transmitting module, the telescopic signal receiving module is installed on the pulley of the forklift and is electrically connected to the controller, the telescopic signal transmitting module is installed on the frame, when the pulley moves forward or retracts, the telescopic signal receiving module is used to receive the signal sent by the telescopic signal transmitting module and transmit it to the controller; the lifting buffer assembly includes a lifting signal receiving module and a lifting signal transmitting module, a part of the lifting signal receiving module is installed on the outer door frame of the forklift, and the other part is installed on the side shifter of the forklift, and is electrically connected to the controller, a part of the lifting signal transmitting module is installed on the middle door frame of the forklift, and the other part is installed on the inner door frame of the forklift, when the door frame or side shifter of the forklift is raised or lowered, the lifting signal receiving module is used to receive the signal sent by the lifting signal transmitting module and transmit it to the controller; the controller controls the pump motor of the forklift to reduce the opening of the throttle valve according to the signal transmitted by the telescopic signal receiving module or the lifting signal receiving module, thereby increasing the resistance of the hydraulic medium, thereby achieving the buffering effect, or closes the throttle valve to stop the telescopic or lifting movement.

[0007] Preferably, the telescopic signal receiving module includes a forward buffer wiring switch and a retraction buffer wiring switch, and the forward buffer wiring switch and the retraction buffer wiring switch are respectively arranged on both sides of the pulley; the telescopic signal transmitting module includes a forward buffer induction source and a retraction buffer induction source, and the forward buffer induction source and the retraction buffer induction source are respectively located on both sides of the frame; when the forward buffer wiring switch receives the signal emitted by the forward buffer induction source and transmits it to the controller, the controller controls the pump motor to reduce the opening of the throttle valve; when the retraction buffer wiring switch receives the signal emitted by the retraction buffer induction source and transmits it to the controller, the controller controls the pump motor to reduce the opening of the throttle valve.

[0008] Preferably, the telescopic signal receiving module also includes a forward stop wiring switch and a retraction stop wiring switch, the forward stop wiring switch is arranged on the rear side of the forward buffer wiring switch, and the retraction stop wiring switch is arranged on the front side of the retraction buffer wiring switch; when the forward stop wiring switch receives the signal emitted by the forward buffer induction source and transmits it to the controller, the controller controls the pump motor to close the throttle valve to stop the forward movement of the pulley; when the retraction stop wiring switch receives the signal emitted by the retraction buffer induction source and transmits it to the controller, the controller controls the pump motor to close the throttle valve to stop the retraction movement of the pulley.

[0009] Preferably, the telescopic buffer assembly also includes a buffer cylinder and a retraction buffer shock absorber. Two buffer cylinders are provided, and the two buffer cylinders are respectively arranged at the two ends of the forward movement and retraction of the pulley, and the retraction buffer shock absorber is arranged at the rear end of the pulley.

[0010] Preferably, the lifting signal receiving module includes a first induction wiring switch, which is arranged on one side of the side shifter; the lifting signal transmitting module includes a first rising buffer induction source and a falling buffer induction source, which are both arranged on the same side of the inner door frame, the first rising buffer induction source is located at the upper part of the inner door frame, and the falling buffer induction source is located at the lower part of the inner door frame; when the first induction wiring switch receives the signal emitted by the first rising buffer induction source or the falling buffer induction source and transmits it to the controller, the controller controls the pump motor to reduce the opening of the throttle valve.

[0011] Preferably, the lifting signal receiving module also includes a second induction wiring switch and a descent stop wiring switch, the second induction wiring switch and the descent stop wiring switch are both arranged on the other side of the side shifter opposite to the first induction wiring switch, and the descent stop wiring switch is arranged below the second induction wiring switch; the lifting signal transmitting module also includes a first rising stop induction source and a descent stop induction source, the first rising stop induction source is arranged on the other side of the inner door frame opposite to the first rising buffer induction source, and the descent stop induction source is arranged on the other side of the inner door frame opposite to the descent buffer induction source; when the second induction wiring switch receives the signal emitted by the first rising stop induction source and transmits it to the controller, the controller controls the pump motor to close the throttle valve to stop the rising movement of the side shifter; when the descent stop wiring switch receives the signal emitted by the descent stop induction source and transmits it to the controller, the controller controls the pump motor to close the throttle valve to stop the descending movement of the side shifter.

[0012] Preferably, the lifting signal transmitting module also includes an anti-smashing sensing source, which is arranged on the same side of the inner door frame as the first rising stop sensing source and the descending stop sensing source, and the anti-smashing sensing source is arranged close to the descending stop sensing source; when the forklift door frame is not raised as a whole and the side shifter is descending, the second induction wiring switch can normally receive the signal emitted by the anti-smashing sensing source and transmit it to the controller, and the controller controls the pump motor to close the throttle valve to stop the descending movement of the side shifter; when the forklift door frame is raised as a whole and the side shifter is descending, the second induction wiring switch will not receive the signal emitted by the anti-smashing sensing source, and the side shifter continues to descend.

[0013] Preferably, the length of the signal emission area of ​​the first rising buffer induction source is longer than the length of the signal emission area of ​​the first rising stop induction source, and the length of the signal emission area of ​​the falling buffer induction source is longer than the length of the signal emission area of ​​the falling stop induction source. On the same height plane, a part of the signal emission area of ​​the first rising stop induction source is located above the first rising buffer induction source, and another part overlaps with the signal emission area of ​​the first rising buffer induction source, and the signal emission area of ​​the falling stop induction source is located below the falling buffer induction source.

[0014] Preferably, the lifting signal receiving module also includes an upper buffer induction wiring switch, which is arranged at the upper end of one side of the outer door frame; the lifting signal transmitting module also includes a second lifting buffer induction source, which is arranged at the lower part of one side of the middle door frame; when the upper buffer induction wiring switch receives the signal emitted by the second lifting buffer induction source and transmits it to the controller, the controller controls the pump motor to reduce the opening of the throttle valve.

[0015] Preferably, the lifting signal receiving module also includes an upper end stop sensing wiring switch, and the upper end stop sensing wiring switch is arranged at the upper end of the other side of the outer door frame opposite to the upper end buffer sensing wiring switch; the lifting signal transmitting module also includes a second rising stop sensing source, and the second rising stop sensing source is arranged at the lower part of the other side of the middle door frame opposite to the second rising buffer sensing source; when the upper end stop sensing wiring switch receives the signal emitted by the second rising stop sensing source and transmits it to the controller, the controller controls the pump motor to close the throttle valve to stop the rising movement of the middle door frame.

[0016] Preferably, the lifting buffer assembly also includes a descent buffer shock absorber and a descent buffer plate, the descent buffer shock absorber is arranged at the top of the outer mast, and the descent buffer plate is arranged at the top of the middle mast, when the middle mast descends to the limit, the descent buffer plate cooperates with the descent buffer shock absorber to achieve buffering of the middle mast.

[0017] Compared with the prior art, the present application discloses a forward-moving forklift lifting system that realizes high-lifting gantry system buffering, which realizes system buffering of the forklift's lifting system by setting a telescopic buffer assembly and a lifting buffer assembly. It can slow down and buffer the forklift gantry or side shifter before it moves to the extreme position, so as to reduce the impact and vibration when it moves to the extreme position, thereby effectively protecting the safety of the goods, reducing the mechanical wear and hydraulic shock of the equipment, and extending the service life of the forklift.

[0018] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of the forklift lifting system of the present invention; Figure 2 It is a schematic diagram of the anti-smashing sensing structure of the forklift lifting system of the present invention; Figure 3 It is a schematic diagram of the structure of the forklift lifting system (with the mast fully raised) of the present invention; Figure 4 It is a structural schematic diagram of the forward movement and retraction of the pulley of the forklift lifting system of the present invention.

[0020] Reference numerals: 111, forward buffer wiring switch; 112, retract buffer wiring switch; 113, forward stop wiring switch; 114, retract stop wiring switch; 121, forward buffer induction source; 122, retract buffer induction source; 211, first induction wiring switch; 212, second induction wiring switch; 213, upper end buffer induction wiring switch; 214, upper end stop induction wiring switch; 215, descending stop wiring switch; 221, first ascending buffer induction source; 222, descending buffer induction source; 223, first ascending stop induction source; 224, descending stop induction source; 225, anti-smashing induction source; 226, second ascending buffer induction source; 227, second ascending stop induction source; 1. Controller; 2. Frame; 3. Pulley; 4. Side shifter; 5. Inner mast; 6. Middle mast; 7. Outer mast; 8. Retraction buffer shock absorber; 9. Lowering buffer shock absorber; 10. Lowering buffer plate. DETAILED DESCRIPTION

[0021] The invention discloses a forward-moving forklift lifting system for realizing high-lifting gantry system buffering, which can provide stable buffering and ensure the safety of goods, and at the same time, can also reduce mechanical wear and hydraulic shock of equipment and extend the service life of the forklift.

[0022] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0023] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0024] Reference below Figures 1 to 4 A reach forklift lifting system for achieving high lift gantry system buffering in an embodiment of the present invention is described.

[0025] Disclosed in an embodiment of the present application is a reach-forklift lifting system that implements buffering of a high-lift gantry system, comprising: a controller 1, a telescopic buffer assembly, and a lifting buffer assembly.

[0026] Among them, the controller 1 is installed on the frame 2 of the forklift; the telescopic buffer assembly includes a telescopic signal receiving module and a telescopic signal transmitting module, the telescopic signal receiving module is installed on the pulley 3 of the forklift and is electrically connected to the controller 1, and the telescopic signal transmitting module is installed on the frame 2. When the pulley 3 moves forward or retracts, the telescopic signal receiving module is used to receive the signal sent by the telescopic signal transmitting module and transmit it to the controller 1; the lifting buffer assembly includes a lifting signal receiving module and a lifting signal transmitting module, a part of the lifting signal receiving module is installed on the outer door frame 7 of the forklift, and the other part is installed on the forklift The lifting signal transmitting module is mounted on the side shifter 4 and is electrically connected to the controller 1. A part of the lifting signal transmitting module is mounted on the middle mast 6 of the forklift, and the other part is mounted on the inner mast 5 of the forklift. When the mast or the side shifter 4 of the forklift is raised or lowered, the lifting signal receiving module is used to receive the signal sent by the lifting signal transmitting module and transmit it to the controller 1. The controller 1 controls the pump motor of the forklift to reduce the opening of the throttle valve according to the signal transmitted by the telescopic signal receiving module or the lifting signal receiving module, thereby increasing the resistance of the hydraulic medium and achieving a buffering effect, or closes the throttle valve to stop the telescopic or lifting movement.

[0027] The telescopic buffer assembly is used to control the buffering action of the forward movement and retraction of the forklift mast, wherein the telescopic signal receiving module in the telescopic buffer assembly moves with the pulley 3, and the telescopic signal transmitting module in the telescopic buffer assembly is fixedly installed on the frame 2; when the pulley 3 moves to the position of the telescopic signal transmitting module, the telescopic signal receiving module first receives the buffering signal emitted by the telescopic signal transmitting module, and transmits the buffering signal to the controller 1, and the controller 1 sends an instruction to the pump motor according to the received buffering signal, and controls the pump motor to reduce the opening of the throttle valve in the hydraulic flow channel to increase the flow resistance of the hydraulic medium, thereby reducing the flow of the hydraulic medium to the hydraulic cylinder that controls the forward movement and retraction of the pulley 3, thereby slowing down the forward movement and retraction speed of the pulley 3, and achieving the buffering effect; after buffering for a period of time, the telescopic buffer signal module will receive the movement stop signal emitted by the telescopic signal transmitting module again, and transmit the movement stop signal to the controller 1, and the controller 1 sends an instruction to the pump motor according to the received movement stop signal, and controls the pump motor to close the throttle valve, so that the hydraulic cylinder that controls the forward movement and retraction of the pulley 3 stops working, thereby stopping the movement of the pulley 3.

[0028] The lifting buffer assembly is used to control the buffering action of raising and lowering the forklift mast or the side shifter 4, wherein the lifting signal receiving module part in the lifting buffer assembly moves with the side shifter 4, and the remaining part is fixedly installed on the forklift outer mast 7, and the lifting signal transmitting module part in the lifting buffer assembly moves with the forklift middle mast 6, and the remaining part is fixedly installed on the forklift inner mast 5; when the side shifter 4 or the forklift middle mast 6 moves to the position of the lifting signal transmitting module, the lifting signal receiving module will first receive the buffering signal emitted by the lifting signal transmitting module, and transmit the buffering signal to the controller 1, and the controller 1 sends a command to the pump motor according to the received buffering signal to control the pump motor The machine reduces the opening of the throttle valve in the hydraulic flow channel to increase the flow resistance of the hydraulic medium, thereby reducing the flow of the hydraulic medium to the hydraulic cylinder that controls the lifting and lowering of the side shifter 4 or the forklift's middle mast 6, thereby slowing down the lifting and lowering speed of the side shifter 4 or the forklift's middle mast 6 to achieve a buffering effect; after buffering for a period of time, the lifting and lowering buffering signal module will receive the movement stop signal emitted by the lifting and lowering signal transmitting module again, and transmit the movement stop signal to the controller 1, and the controller 1 sends an instruction to the pump motor according to the received movement stop signal, and controls the pump motor to close the throttle valve to stop the hydraulic cylinder of the side shifter 4 or the forklift's middle mast 6 from working, thereby stopping the movement of the side shifter 4 or the forklift's middle mast 6.

[0029] The present application realizes system buffering of the lifting system of the forklift by setting up a telescopic buffer component and a lifting buffer component, and can slow down and buffer the forklift mast or side shifter 4 before it moves to the extreme position, so as to reduce the impact and vibration when it moves to the extreme position, thereby effectively protecting the safety of the goods, reducing the mechanical wear and hydraulic shock of the equipment, and extending the service life of the forklift.

[0030] In some embodiments, for example Figure 4 As shown, the telescopic signal receiving module includes a forward buffer wiring switch 111 and a retracting buffer wiring switch 112, and the forward buffer wiring switch 111 and the retracting buffer wiring switch 112 are respectively arranged on both sides of the pulley 3; the telescopic signal transmitting module includes a forward buffer induction source 121 and a retracting buffer induction source 122, and the forward buffer induction source 121 and the retracting buffer induction source 122 are respectively located on both sides of the frame 2; when the forward buffer wiring switch 111 receives the signal emitted by the forward buffer induction source 121 and transmits it to the controller 1, the controller 1 controls the pump motor to reduce the opening of the throttle valve; when the retracting buffer wiring switch 112 receives the signal emitted by the retracting buffer induction source 122 and transmits it to the controller 1, the controller 1 controls the pump motor to reduce the opening of the throttle valve.

[0031] The forward movement buffer wiring switch 111 is used to receive the signal emitted by the forward movement buffer induction source 121, and transmit the signal to the controller 1, so that the controller 1 can control the pump motor to reduce the throttle valve opening in the hydraulic channel, increase the flow resistance of the hydraulic medium, and thus achieve the forward movement buffer of the pulley 3. Similarly, the retraction buffer wiring switch 112 is used to receive the signal emitted by the retraction buffer induction source 122, and transmit the signal to the controller 1, so that the controller 1 can control the pump motor to reduce the throttle valve opening in the hydraulic channel, and thus achieve the retraction buffer of the pulley 3.

[0032] Furthermore, the telescopic signal receiving module also includes a forward stop wiring switch 113 and a retraction stop wiring switch 114, the forward stop wiring switch 113 is arranged on the rear side of the forward buffer wiring switch 111, and the retraction stop wiring switch 114 is arranged on the front side of the retraction buffer wiring switch 112; when the forward stop wiring switch 113 receives the signal emitted by the forward buffer induction source 121 and transmits it to the controller 1, the controller 1 controls the pump motor to close the throttle valve to stop the forward movement of the pulley 3; when the retraction stop wiring switch 114 receives the signal emitted by the retraction buffer induction source 122 and transmits it to the controller 1, the controller 1 controls the pump motor to close the throttle valve to stop the retraction movement of the pulley 3.

[0033] The forward movement stop wiring switch 113 is used to receive the signal emitted by the forward movement buffer induction source 121, and transmit the signal to the controller 1, so that the controller 1 can control the pump motor to close the throttle valve, thereby stopping the forward movement of the pulley 3. Similarly, the retraction stop wiring switch 114 is used to receive the signal emitted by the retraction buffer induction source 122, and transmit the signal to the controller 1, so that the controller 1 can control the pump motor to close the throttle valve, thereby stopping the retraction movement of the pulley 3.

[0034] In some embodiments, for example Figure 1 As shown, the telescopic buffer assembly also includes a buffer cylinder and a retraction buffer shock absorber 8. Two buffer cylinders are provided, and the two buffer cylinders are respectively arranged at the two ends of the forward movement and retraction of the pulley 3, and the retraction buffer shock absorber 8 is arranged at the rear end of the pulley 3.

[0035] The buffer cylinder can further buffer the pulley 3 when the pulley 3 moves forward or retracts to the extreme position, so that the pulley 3 can stop moving more smoothly, thereby further ensuring the safety of the goods on the forklift mast.

[0036] The retraction buffer shock absorber 8 can further enhance the retraction buffer of the pulley 3 and achieve a significant shock absorbing effect.

[0037] In some embodiments, for example Figure 2 As shown, the lifting signal receiving module includes a first induction wiring switch 211, and the first induction wiring switch 211 is arranged on one side of the side shifter 4; the lifting signal transmitting module includes a first rising buffer induction source 221 and a falling buffer induction source 222, and the first rising buffer induction source 221 and the falling buffer induction source 222 are both arranged on the same side of the inner door frame 5, the first rising buffer induction source 221 is located at the upper part of the inner door frame 5, and the falling buffer induction source 222 is located at the lower part of the inner door frame 5; when the first induction wiring switch 211 receives the signal emitted by the first rising buffer induction source 221 or the falling buffer induction source 222 and transmits it to the controller 1, the controller 1 controls the pump motor to reduce the opening of the throttle valve.

[0038] The first induction wiring switch 211 is used to receive the signal emitted by the first rising buffer induction source 221 or the descending buffer induction source 222, and transmit the signal to the controller 1, so that the controller 1 can control the pump motor to reduce the throttle valve opening in the hydraulic channel, thereby achieving buffering of the side shifter 4 during the lifting or descending process.

[0039] Furthermore, the lifting signal receiving module further includes a second induction wiring switch 212 and a descending stop wiring switch 215, both of which are arranged on the other side of the side shifter 4 opposite to the first induction wiring switch 211, and the descending stop wiring switch 215 is arranged below the second induction wiring switch 212; the lifting signal transmitting module further includes a first rising stop induction source 223 and a descending stop induction source 224, and the first rising stop induction source 223 is arranged opposite to the first rising buffer induction source 221. On the other side of the inner door frame 5, the descent stop induction source 224 is set on the other side of the inner door frame 5 opposite to the descent buffer induction source 222; when the second induction wiring switch 212 receives the signal emitted by the first ascent stop induction source 223 and transmits it to the controller 1, the controller 1 controls the pump motor to close the throttle valve to stop the ascent movement of the side shifter 4; when the descent stop wiring switch 215 receives the signal emitted by the descent stop induction source 224 and transmits it to the controller 1, the controller 1 controls the pump motor to close the throttle valve to stop the descending movement of the side shifter 4.

[0040] The second induction wiring switch 212 and the descent stop wiring switch 215 are respectively used to receive the signals emitted by the first rise stop induction source 223 or the descent stop induction source 224, and transmit the signals to the controller 1, so that the controller 1 can control the pump motor to close the throttle valve, thereby realizing the stop of the lifting or descending movement of the side shifter 4.

[0041] Furthermore, the lifting signal transmitting module also includes an anti-smashing sensing source 225, which is arranged on the same side of the inner door frame 5 as the first rising stop sensing source 223 and the descending stop sensing source 224, and the anti-smashing sensing source 225 is arranged close to the descending stop sensing source 224; when the forklift door frame is not raised as a whole and the side shifter 4 is descending, the second induction wiring switch 212 can normally receive the signal emitted by the anti-smashing sensing source 225 and transmit it to the controller 1, and the controller 1 controls the pump motor to close the throttle valve to stop the descending movement of the side shifter 4; when the forklift door frame is raised as a whole and the side shifter 4 is descending, the second induction wiring switch 212 will not receive the signal emitted by the anti-smashing sensing source 225, and the side shifter 4 continues to descend.

[0042] The setting of the anti-smash sensing source 225 can prevent the cargo on the side shifter 4 from colliding with the front axle of the forklift frame 2, causing damage to the cargo; among them, only when the forklift mast is not raised as a whole and the side shifter 4 is performing lifting and lowering movements alone, the signal emitted by the anti-smash sensing source 225 will be received by the second induction wiring switch 212. If the forklift mast is raised as a whole, the side shifter 4 is far away from the front axle of the forklift frame 2, even if the side shifter 4 drops to the bottom of the forklift inner mast 5, it will not collide with the front axle of the forklift frame 2, thereby not affecting the safety of the cargo.

[0043] In some embodiments, the length of the signal emission area of ​​the first rising buffer induction source 221 is longer than the length of the signal emission area of ​​the first rising stop induction source 223, and the length of the signal emission area of ​​the falling buffer induction source 222 is longer than the length of the signal emission area of ​​the falling stop induction source 224. On the same height plane, a part of the signal emission area of ​​the first rising stop induction source 223 is located above the first rising buffer induction source 221, and the other part overlaps with the signal emission area of ​​the first rising buffer induction source 221, and the signal emission area of ​​the falling stop induction source 224 is located below the falling buffer induction source 222.

[0044] The first rising buffer induction source 221 and the descending buffer induction source 222 with longer signal transmission area can enable the side shifter 4 to receive buffering for a sufficiently long time, thereby avoiding the buffering time being too short, resulting in insufficient buffering and causing the goods on the side shifter 4 to be subjected to a greater impact and damage the goods; the setting position of the first rising stop induction source 223 and the descending stop induction source 224 can ensure that the side shifter 4 quickly connects to the movement stop after receiving sufficient buffering, so that the entire buffering process is smoothly connected without pause, and the buffering effect is good.

[0045] In some embodiments, for example Figure 3 As shown, the lifting signal receiving module also includes an upper buffer induction wiring switch 213, which is arranged at the upper end of one side of the outer door frame 7; the lifting signal transmitting module also includes a second lifting buffer induction source 226, which is arranged at the lower part of one side of the middle door frame 6; when the upper buffer induction wiring switch 213 receives the signal emitted by the second lifting buffer induction source 226 and transmits it to the controller 1, the controller 1 controls the pump motor to reduce the opening of the throttle valve.

[0046] The setting of the upper end buffer induction wiring switch 213 and the rising buffer induction source can buffer the middle mast 6 that is rising or falling, thereby reducing the vibration generated by the forklift middle mast 6 when it moves to the extreme position, thereby ensuring the stability of the goods during the lifting process and preventing the goods from being damaged; the upper end buffer induction wiring switch 213 is used to receive the signal emitted by the rising buffer induction source and transmit the signal to the controller 1, so that the controller 1 can control the pump motor to reduce the throttle valve opening in the hydraulic flow channel, thereby achieving buffering of the forklift middle mast 6 during the lifting process.

[0047] Furthermore, the lifting signal receiving module also includes an upper stop sensing wiring switch 214, which is arranged at the upper end of the other side of the outer door frame 7 opposite to the upper end buffer sensing wiring switch 213; the lifting signal transmitting module also includes a second rising stop sensing source 227, which is arranged at the lower part of the other side of the middle door frame 6 opposite to the second rising buffer sensing source 226; when the upper end stop sensing wiring switch 214 receives the signal emitted by the second rising stop sensing source 227 and transmits it to the controller 1, the controller 1 controls the pump motor to close the throttle valve to stop the rising movement of the middle door frame 6.

[0048] The setting of the upper stop sensing wiring switch 214 and the second rising stop sensing source 227 can stop the movement of the forklift's middle mast 6 that has been subjected to the buffering effect; the upper stop sensing wiring switch 214 is used to receive the signal emitted by the second rising stop sensing source 227, and transmit the signal to the controller 1, so that the controller 1 can control the pump motor to close the throttle valve, thereby stopping the movement of the forklift's middle mast 6.

[0049] In some embodiments, for example Figure 1 As shown, the lifting buffer assembly also includes a descent buffer shock absorber 9 and a descent buffer plate 10. The descent buffer shock absorber 9 is arranged at the top of the outer mast 7, and the descent buffer plate 10 is arranged at the top of the middle mast 6. When the middle mast 6 descends to the limit, the descent buffer plate 10 cooperates with the descent buffer shock absorber 9 to achieve buffering of the middle mast 6.

[0050] Other components and operations of the reach forklift lifting system for implementing high lift gantry system buffering according to the embodiment of the present invention are well known to those skilled in the art and will not be described in detail here.

[0051] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0052] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A reach-forklift lifting system for realizing high-lift gantry system buffering, characterized in that: include: Controller, telescopic buffer assembly and lifting buffer assembly; The controller is mounted on the frame of the forklift; The telescopic buffer assembly includes a telescopic signal receiving module and a telescopic signal transmitting module. The telescopic signal receiving module is installed on the trolley of the forklift and is electrically connected to the controller. The telescopic signal transmitting module is installed on the frame. When the trolley moves forward or retracts, the telescopic signal receiving module is used to receive the signal sent by the telescopic signal transmitting module and transmit it to the controller. The lifting buffer assembly includes a lifting signal receiving module and a lifting signal transmitting module. A part of the lifting signal receiving module is installed on the outer mast of the forklift, and another part is installed on the side shifter of the forklift, and is electrically connected to the controller. A part of the lifting signal transmitting module is installed on the middle mast of the forklift, and another part is installed on the inner mast of the forklift. When the mast or the side shifter of the forklift is raised or lowered, the lifting signal receiving module is used to receive the signal sent by the lifting signal transmitting module and transmit it to the controller; The controller controls the pump motor of the forklift to reduce the opening of the throttle valve according to the signal transmitted by the telescopic signal receiving module or the lifting signal receiving module, thereby increasing the resistance of the hydraulic medium and achieving a buffering effect, or closes the throttle valve to stop the telescopic or lifting movement.

2. The reach forklift lifting system for realizing high lifting gantry system buffering according to claim 1, characterized in that: The telescopic signal receiving module includes a forward buffer wiring switch and a retracting buffer wiring switch, and the forward buffer wiring switch and the retracting buffer wiring switch are respectively arranged on both sides of the pulley; the telescopic signal transmitting module includes a forward buffer induction source and a retracting buffer induction source, and the forward buffer induction source and the retracting buffer induction source are respectively located on both sides of the frame; When the forward movement buffer wiring switch receives the signal emitted by the forward movement buffer induction source and transmits it to the controller, the controller controls the pump motor to reduce the opening of the throttle valve; When the retraction buffer wiring switch receives the signal emitted by the retraction buffer induction source and transmits it to the controller, the controller controls the pump motor to reduce the opening of the throttle valve.

3. The reach forklift lifting system for realizing high lifting gantry system buffering according to claim 2, characterized in that: The telescopic signal receiving module further includes a forward stop wiring switch and a retract stop wiring switch, wherein the forward stop wiring switch is arranged at the rear side of the forward buffer wiring switch, and the retract stop wiring switch is arranged at the front side of the retract buffer wiring switch; When the forward movement stop wiring switch receives the signal emitted by the forward movement buffer induction source and transmits it to the controller, the controller controls the pump motor to close the throttle valve to stop the forward movement of the pulley; When the retraction stop wiring switch receives the signal emitted by the retraction buffer induction source and transmits it to the controller, the controller controls the pump motor to close the throttle valve to stop the retraction movement of the pulley.

4. The reach forklift lifting system for realizing high lifting gantry system buffering according to claim 1, characterized in that: The telescopic buffer assembly also includes a buffer oil cylinder and a retraction buffer shock absorber. Two buffer oil cylinders are provided. The two buffer oil cylinders are respectively arranged at the two ends of the forward movement and retraction of the pulley, and the retraction buffer shock absorber is arranged at the rear end of the pulley.

5. The reach forklift lifting system for realizing high lifting gantry system buffering according to claim 1, characterized in that: The lifting signal receiving module includes a first induction wiring switch, which is arranged on one side of the side shifter; the lifting signal transmitting module includes a first rising buffer induction source and a falling buffer induction source, which are both arranged on the same side of the inner door frame, the first rising buffer induction source is located at the upper part of the inner door frame, and the falling buffer induction source is located at the lower part of the inner door frame; When the first induction wiring switch receives a signal emitted by the first rising buffer induction source or the falling buffer induction source and transmits it to the controller, the controller controls the pump motor to reduce the opening of the throttle valve.

6. The reach forklift lifting system for realizing high lifting gantry system buffering according to claim 5, characterized in that: The lifting signal receiving module further includes a second induction wiring switch and a descending stop wiring switch, wherein the second induction wiring switch and the descending stop wiring switch are both arranged on the other side of the side shifter opposite to the first induction wiring switch, and the descending stop wiring switch is arranged below the second induction wiring switch at a distance; The lifting signal transmitting module further includes a first rising stop induction source and a descending stop induction source, wherein the first rising stop induction source is arranged on the other side of the inner mast opposite to the first rising buffer induction source, and the descending stop induction source is arranged on the other side of the inner mast opposite to the descending buffer induction source; When the second induction wiring switch receives the signal emitted by the first rise stop induction source and transmits it to the controller, the controller controls the pump motor to close the throttle valve to stop the rising movement of the side shifter; When the descent stop wiring switch receives the signal emitted by the descent stop sensing source and transmits it to the controller, the controller controls the pump motor to close the throttle valve to stop the descending movement of the side shifter.

7. The reach forklift lifting system for realizing high lifting gantry system buffering according to claim 6, characterized in that: The lifting signal transmitting module further includes an anti-smashing induction source, which is arranged on the same side of the inner door frame as the first lifting stop induction source and the descending stop induction source, and the anti-smashing induction source is arranged close to the descending stop induction source; When the forklift mast is not raised as a whole and the side shifter is descending, the second induction wiring switch can normally receive the signal emitted by the anti-smashing induction source and transmit it to the controller, and the controller controls the pump motor to close the throttle valve to stop the descending movement of the side shifter; When the forklift mast is raised as a whole and the side shifter is lowered, the second induction wiring switch will not receive the signal emitted by the anti-smashing induction source, and the side shifter continues to descend.

8. The reach forklift lifting system for realizing high lifting gantry system buffering according to claim 6, characterized in that: The length of the signal emission area of ​​the first rising buffer induction source is longer than the length of the signal emission area of ​​the first rising stop induction source, and the length of the signal emission area of ​​the falling buffer induction source is longer than the length of the signal emission area of ​​the falling stop induction source. On the same height plane, a part of the signal emission area of ​​the first rising stop induction source is located above the first rising buffer induction source, and another part overlaps with the signal emission area of ​​the first rising buffer induction source, and the signal emission area of ​​the falling stop induction source is located below the falling buffer induction source.

9. The reach forklift lifting system for realizing high lifting gantry system buffering according to claim 1, characterized in that: The lifting signal receiving module further includes an upper buffer induction wiring switch, which is arranged at an upper end of one side of the outer door frame; the lifting signal transmitting module further includes a second lifting buffer induction source, which is arranged at a lower part of one side of the middle door frame; When the upper end buffer induction wiring switch receives the signal emitted by the second rising buffer induction source and transmits it to the controller, the controller controls the pump motor to reduce the opening of the throttle valve.

10. The reach forklift lifting system for realizing high lifting gantry system buffering according to claim 9, characterized in that: The lifting signal receiving module further includes an upper stop induction wiring switch, which is arranged at the upper end of the other side of the outer door frame opposite to the upper end buffer induction wiring switch; the lifting signal transmitting module further includes a second lifting stop induction source, which is arranged at the lower part of the other side of the middle door frame opposite to the second lifting buffer induction source; When the upper end stop sensing wiring switch receives the signal emitted by the second rise stop sensing source and transmits it to the controller, the controller controls the pump motor to close the throttle valve to stop the rising movement of the middle mast.

11. The reach forklift lifting system for realizing high lifting gantry system buffering according to claim 1, characterized in that: The lifting buffer assembly also includes a descent buffer shock absorber and a descent buffer plate. The descent buffer shock absorber is arranged at the top end of the outer mast, and the descent buffer plate is arranged at the top end of the middle mast. When the middle mast descends to the limit, the descent buffer plate cooperates with the descent buffer shock absorber to achieve buffering of the middle mast.

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