Abstract
The present invention relates to an order picker with a wiring mechanism, belonging to the technical field of manned elevation equipment. The order picker with a wiring mechanism comprises a stationary part, an elevation mechanism and an elevation part, wherein the wire suitable for transmitting signals is connected between the stationary part and the elevation part. It also comprises a wire accumulator which acts on the wire in such a way that the wire is always tensioned between the stationary part and the elevation part; when the elevation part is raised, the wire accumulator starts to pay out the wire, and when the elevation part is lowered, the wire accumulator starts to stow the wire. The present invention adopts a wire accumulator structure which can avoid the wires which come from the chassis being nipped during elevation of the elevation structure.
Claims
1. An order picker with a wiring mechanism comprising a stationary part, an elevation mechanism and an elevation part, wherein a wire suitable for transmitting signals is connected between the stationary part and the elevation part, characterized in that the order picker also comprises a wire accumulator, a first guide pulley, a first wire fixing point, a second guide pulley/pulley block, and a second wire fixing point; wherein the wire accumulator acts on the wire in such a way that the wire is always tensioned between the stationary part and the elevation part, wherein, when the elevation part is raised, the wire accumulator starts to pay out the wire, and when the elevation part is lowered, the wire accumulator starts to stow the wire; the wire accumulator comprises a fixed pulley, a movable pulley, a clump weight and a guidepost, wherein the movable pulley is mounted on the clump weight, the clump weight is mounted on the guidepost in such a way that it can be raised and lowered thereon and the wire is guided by the fixed pulley and then wound around the movable pulley so that some part of the wire is stored on the wire accumulator; the stationary part comprises a chassis, the elevation mechanism comprises a hydraulic elevation assembly, a sprocket elevation assembly and a second sprocket elevation assembly, and the elevation part comprises a picker platform; the hydraulic elevation assembly comprises a fixed mast, a hydraulic cylinder and a movable mast; the sprocket elevation assembly comprises a sprocket, a chain and a second movable mast as the elevation object of the sprocket elevation assembly; the second sprocket elevation assembly comprises a second sprocket and a second chain; the picker platform is the elevation object of the second sprocket elevation assembly; the fixed mast is erected and fixed on the chassis, and a knockout rod of the hydraulic cylinder is connected to the movable mast to drive the movable mast; one end of the chain is connected to the fixed mast and the other end is connected to the second movable mast so that the second movable mast is raised and lowered by the raising and lowering of the movable mast and with the assistance of the sprocket and the chain; the picker platform is raised and lowered by the raising and lowering of the second movable mast and with the assistance of the second sprocket and the second chain; wherein the wire comes out from the picker platform and is fixed at the first wire fixing point on the movable mast after its direction is changed by the first guide pulley, is tensioned by the movable pulley after the direction is changed by the second guide pulley/pulley block, and then the wire is fixed at the second wire fixing point onto the bottom of the fixed mast or the chassis after passing through the fixed pulley, wherein the second guide pulley/pulley block is mounted on the movable mast, and the guidepost is fixed on the bottom of the fixed mast or the chassis.
2. The order picker with a wiring mechanism as claimed in claim 1, characterized in that one end of the second chain is connected to the movable mast and the other end is connected to the picker platform.
3. The order picker with a wiring mechanism as claimed in claim 1, characterized in that the chassis is provided with two front driven omni-directional wheels and two rear driving directional wheels, wherein the two rear driving directional wheels drive the order picker in a non-coaxial way so that the forward, backward and steering motions of the order picker are determined by the direction of rotation and the difference of rotation speed of the two rear driving directional wheels.
Description
BRIEF DESCRIPTION OF THE SEVERAL VIEWS OF THE DRAWINGS
(1) FIG. 1 is an overall structural diagram of Embodiment I according to the present invention;
(2) FIG. 2 is a structural diagram of the picker platform according to the present invention;
(3) FIG. 3 is a structural diagram of the drawer according to the present invention;
(4) FIG. 4 is a general arrangement of the pothole assembly according to the present invention;
(5) FIG. 5 is a structural diagram of the pothole assembly according to the present invention
(6) FIG. 6 is a schematic diagram of the elevation principle of the three masts according to the present invention;
(7) FIG. 7 is a schematic diagram of the wiring mechanism according to the present invention;
(8) FIGS. 8A and 8B are a schematic diagram of the elevation of the present invention;
(9) FIG. 9 is the schematic diagram for the three-mast elevation structure according to the present invention (the movable mast);
(10) FIG. 10 is the schematic diagram for the three-mast elevation structure according to the present invention (the second movable mast);
(11) FIG. 11 is the schematic diagram for the three-mast elevation structure according to the present invention (the picker platform);
(12) FIG. 12 is an overall structural diagram of Embodiment II according to the present invention;
(13) In the figures, 1chassis, 5picker platform, 8guide element, 9directional element, 10mounting plate; 1-1drawer, 1-2front driven omni-directional wheel, 1-3rear driven directional wheel, 1-4brake prop foot; 1-10flip, 1-11jack catch, 1-12second axle, 1-13lower link, 1-14middle link, 1-15first axle, 1-16strut, 1-17base plate; 2-1fixed mast, 2-2hydraulic cylinder, 2-3movable mast, 3-1sprocket, 3-2chain, 3-3second movable mast; 4-1second sprocket, 4-2second chain; 5-1split-type dual front door, 5-2stop, 5-3torsion spring, 5-4skeleton, 5-5scissor-type side door, 5-6bolt; 6-1wire, 6-2first guide pulley, 6-3first wire fixing point, 6-4second guide pulley/pulley block, 6-5movable pulley, 6-6clump weight, 6-7guide post, 6-8third guide pulley, 6-9second wire fixing point; 8-1mount, 8-2wide roller, 8-3plane; 9-1directional wheel, 9-2C-like folded face.
DETAILED DESCRIPTION OF THE INVENTION
(14) The present invention will be further detailed hereinafter with the accompanying figures.
(15) The embodiments are intended only for describing the present invention but not to limit the present invention. The patent law protects any changes made by those skilled in the present invention after reading the specification and within the scope of the claims.
Embodiment I
(16) An order picker, having a chassis 1, an elevation structure and a picker platform 5. The overall structure is shown in FIG. 1, wherein the chassis 1 is provided with wheels at the bottom, but the wheels cannot rotate of themselves, so the overall machine has to rely on external forces for movement. Each of the front wheels is provided with a brake prop 1-4 foot at the side, so that when the brake prop feet 1-4 are actuated, the brake prop feet 1-4 push against the surface carrying the order picker to distribute at least some gravity of the order picker to the brake prop feet 1-4 so as to generate static friction force and bring the order picker to a stop.
(17) FIG. 2 shows a structural diagram of the picker platform 5 of the order picker. The picker platform 5 is provided with a split-type dual front door 5-1 and two scissor-type side doors 5-5, wherein the dual front door 5-1, mounted on the skeleton 5-4 of the picker platform 5 through stops 5-2 and torsion springs 5-3, is opened by pushing, and once the pushing force is removed, the force generated by the torsion springs 5-3 brings the dual front door 5-1 back and the stops 5-2 limit it in place. Thus, the dual front door 5-1 is closed; one end of the scissor-type side doors 5-5 is hinged to one position of the skeleton 5-4 and the other end is fastened to another position of the skeleton 5-4 by means of bolts 5-6.
(18) As shown by 1-1 in FIG. 1 and FIG. 3 is a structural diagram of the drawer according to the present invention. The hydraulic oil pump of the hydraulic cylinder, a controller, a battery and other devices are placed in the drawer 1-1. The power wire and signal wire of the hydraulic oil pump, the controller and the battery come out from the drawer 1-1, go through the drag chain arranged at the chassis 1 and are movably installed at a fixed position. The drawer 1-1 is arranged at the bottom of the chassis 1 through guide rails.
(19) FIG. 6 and FIGS. 8-11 show a schematic diagram and elevation principle diagram of a three-mast elevation structure. FIG. 9, FIG. 10 and FIG. 11 are consecutive drawings and should be read together. The elevation structure of the three-mast order picker comprises a hydraulic elevation assembly, a sprocket elevation assembly and a picker platform 5. The hydraulic elevation assembly comprises a fixed mast 2-1, a hydraulic cylinder 2-2 and a movable mast 2-3, and the sprocket elevation assembly comprises a sprocket 3-1 and a chain 3-2. The fixed mast 2-1 is erected and fixed on the chassis 1, and the knockout rod of the hydraulic cylinder 2-2 is connected to the movable mast 2-3 to drive the movable mast 2-3. It also comprises a second movable mast 3-3 as the elevation object of the sprocket elevation assembly and a second sprocket elevation assembly with the picker platform 5 as its elevation object. The second sprocket elevation assembly 4 comprises a second sprocket 4-1 and a second chain 4-2; one end of the chain 3-2 is connected to the fixed mast 2-1 and the other end is connected to the second movable mast 3-3 so that the second movable mast 3-3 is raised and lowered by the raising and lowering of the movable mast 2-3 and with the assistance of the sprocket 3-1 and the chain 3-2. The picker platform 5 is raised and lowered by the raising and lowering of the second movable mast 3-3 and with the assistance of the second sprocket 4-1 and the second chain 4-2. One end of the second chain 4-1 is connected to the movable mast 2-3 and the other end is connected to the picker platform 5; in this case, the elevation ratio is 1:3, i.e. when the hydraulic cylinder extends by 0.1 m, the picker platform is raised by 0.3 m. If one end of the second chain 4-1 is connected to the fixed mast 2-1 and the other end is connected to the picker platform 5, the elevation ratio is 1:4.
(20) To make the elevation more smooth, as shown in FIG. 8 and FIG. 9, between the fixed mast 2-1 and the movable mast 2-3 are provided with one or more guide elements 8 which is/are guided by the corresponding piece(s). The guide element (8) is/are the wide roller(s) mounted on the fixed mast 2-1 through the mount 8-1 while the corresponding piece(s) is/are the plane(s) 8-3 formed by the external surface of the movable mast 2-3. In elevation, rolling friction is generated between the plane(s) 8-3 and the wide roller(s) 8-2 so that the wide roller(s) mounted on the fixed mast 2-1 is/are not raised and lowered while the plane(s) 8-3 formed by the external surface of the movable mast 2-3 is/are raised or lowered.
(21) Between the fixed mast 2-1 and the movable mast 2-3 are also provided with directional elements 9, which are guided by the corresponding pieces. The directional elements 9 are the directional wheels 9-1 arranged on the movable mast 2-3 while the corresponding pieces are the C-like folded faces 9-2 formed by the internal surface of the fixed mast 2-1. The diameter of the directional wheels 9-1 is less than the width of the C-like folded faces. In elevation, rolling friction is generated between the directional wheels 9-1 and one face of the C-like folded faces so that the directional wheels mounted on the movable mast 2-3 are raised and lowered while the C-like folded faces 9-2 formed by the internal surface of the fixed mast 2-1 are not raised or lowered.
(22) The guide elements 8 are mounted at the upper part of the fixed mast 2-1 and the directional elements 9 are mounted at the lower part of the movable mast 2-3; in elevation, when the directional elements 9 contact the mounts of the guide elements 8, the two-mast structure is at the maximum height.
(23) To make the elevation smoother, as shown in FIG. 10, the arrangement between the movable mast 2-3 and the second movable mast 3-3 is the same as that between the fixed mast 2-1 and the movable mast 2-3. The specific structure is as described above, i.e. not only comprising guide elements 8, but also comprising directional elements 9.
(24) Likewise, to make the elevation smooth, as shown in FIG. 11, between the second movable mast 3-3 and the picker platform 5 are also provided with multiple directional elements 9 which are guided by the corresponding pieces. The directional elements 9 are rollers 9-1 with an appropriate diameter, arranged on the mounting plate 10, the mounting plate 10 is arranged on the picker platform 5 and kept in parallel with the second movable mast 3-3, the axle of the directional wheels 9-1 is kept vertical to the side face of the picker platform 5, and the corresponding piece of the directional elements 9 is formed by the internal surface of the post of the second movable mast 3-3. I.e. the directional element 9 is arranged inside the post of the second movable mast 3-3.
(25) The picker platform 5 has the power wire and the signal wire coming from the drawer 1-1, which may cause the wires (a cluster of the power wire and the signal wire) to be easily nipped by the picker platform 5 in elevation. For this reason, the embodiment is also provided with a wiring mechanism whose principle is as shown in FIG. 7 and which comprises the wire 6-1, the first guide pulley 6-2, the first wire fixing point 6-3, the second guide pulley/pulley block 6-4, the movable pulley 6-5, the clump weight 6-6, the guide post 6-7, the fixed pulley 6-8 and the second wire fixing point 6-9. The wire 6-1 coming out from the picker platform 5 forms a first wire fixing point 6-3 on the movable mast 2-3 after its direction is changed by the first guide pulley 6-2, is tensioned by the movable pulley 6-5 after the direction is changed again by the second guide pulley/pulley block 6-4, and fixed onto the bottom of the fixed mast 2-1 or the chassis 1 after passing through the third guide pulley 6-8 to form a second wire fixing point 6-9. The second guide pulley/pulley 6-4 block is mounted on the movable mast 2-3, and the guidepost 6-7 is fixed on the bottom of the fixed mast 2-1 or the chassis 1.
(26) The present invention is also provided with an alarm which comprises the limit switch arranged at the bottom of the fixed mast, the limit switches arranged at the side of the brake prop feet and the sensor switch arranged on the split-type dual front door. When the masts are lowered to a certain position and press the limit switch at the bottom of the fixed mast, the alarm will not be actuated. When the masts are raised and the pressure on the limit switch at the bottom of the fixed mast is removed, pushing the split-type dual front door or releasing the brake prop feet will actuate the alarm to alert the operator and people around it. It is because that when the split-type dual front door is pushed, the sensor switch is turned on. When the brake prop feet are released, the brake prop feet are brought to contact the limit switch arranged at the side of the brake prop feet; however, if the brake prop feet are actuated, the brake prop feet will not contact the limit switch.
Embodiment II
(27) An order picker, having a chassis 1, an elevation structure and a picker platform 5. The overall structure is as shown in FIG. 12, the same as that in Embodiment I, but the difference is that the order picker is self-driven, driven by the two rear driving directional wheels 1-3 as shown in FIG. 4 and driven in a non-coaxial way, and each of the wheels is driven by a separate motor so that the forward, backward and steering motions of the order picker are determined by the direction of rotation and the difference of rotation speed of the two rear driving directional wheels 1-3. For example, when the two rear driving directional wheels 1-3 have the same rotation direction and difference of rotation speed, the order picker moves forward or backward in a straight line; if both wheels rotate forward and the speed of the left wheel is greater than that of the right wheel, the order picker turns right while moving forward.
(28) Another difference is that it has a pothole assembly, as shown in FIG. 5, the chassis 1 is also provided with a pothole assembly which comprises a flip 1-10, a jack catch 1-11, a lower link 1-13, a middle link 1-14 and struts 1-16, wherein the upper end of the strut 1-16 movably mounted in a bushing is to be pressed by the picker platform 5 while the lower end props against the roller rotatably connected to one end of the middle link 1-14, the other end of the middle link 1-14 is rotatably connected to one end of the lower link 1-13, the other end of the lower link 1-13 is movably connected to one end of the jack catch 1-11, and the jack catch 1-11 is intended for catching or being welded to the flip 1-10. The middle of the middle link 1-14 is rotatably connected to the base plate 1-17 through a first axle 1-15, and the other end of the jack catch 1-11 is rotatably connected to the base plate 1-17 through the second axle 1-12. When the picker platform 5 is lowered, the top end of the strut 1-16 is pressed so that force is transmitted to one end of the middle link 1-14 through the roller(s), to the other end of the middle link 1-14 through the rotation of the middle link 1-14 and then to the lower link 1-13 which transmits a part of the force to the jack catch 1-11 and the other part of the force to the gas rod, and the gas rod is retracted and accumulates potential energy. At the same time, the jack catch 1-11 welded to the flip 1-10 stows the flip 1-10; when the picker platform is raised, the pressure applied on the top end of the strut 1-16 is removed, the potential energy stored in the gas rod is converted to actuate the gas rod which acts on the lower link 1-13 by means of force to drive the flip 1-10 to erect and restores the strut 1-16 through force transmission to be pressed again by the picker platform 5. When the flip 1-10 is erected, it can prevent the overall machine from falling into potholes.
