CN110655011B

CN110655011B - Logistics transportation device

Info

Publication number: CN110655011B
Application number: CN201910972969.8A
Authority: CN
Inventors: 周木森
Original assignee: Individual
Current assignee: Sino Logistics Tangshan Caofeidian District Logistics Co.,Ltd.
Priority date: 2019-10-14
Filing date: 2019-10-14
Publication date: 2020-12-08
Anticipated expiration: 2039-10-14
Also published as: CN110655011A; CN112357841A; CN112374425A

Abstract

The invention belongs to the field of forklifts, and particularly relates to a logistics transportation device which comprises a forklift body provided with a portal and a fork mechanism, wherein the fork mechanism vertically slides on the portal at the front end of the forklift body; compared with the traditional forklift, the invention can unload the goods to the front side fixed position in a narrow space; when goods are unloaded to the front side of the narrow space limited by free steering, the electric drive module A or the electric drive module B drives the frame formed by the two square rods and the two telescopic plates to incline through a series of transmission, the goods slide down obliquely along the inclination direction of the telescopic plates to the front position of the side of the vehicle body quickly, and then the unloading and stacking work of the goods to the front position of the side of the vehicle body can be completed through small movement of workers.

Description

Logistics transportation device

Technical Field

The invention belongs to the field of forklifts, and particularly relates to a logistics transportation device.

Background

Fork truck is used widely in the commodity circulation field as the instrument of transport goods, and traditional fork truck is when the fork gets the transport goods, if two forks of fork truck do not fork the bottom center department of getting the goods, the central point between two forks of focus of goods puts for the goods is because jolting repeatedly and lead to the goods that the focus deviates two forks center department more and more take place the incline and even from two forks of fork truck landing in the transportation, thereby damages the goods of transport. Meanwhile, when the goods with larger mass are positioned on the two forks of the forklift, if the two forks of the forklift are found not to fork the center of the bottom of the goods, the goods cannot be directly adjusted in the mid-air due to the larger mass of the goods, and the forklift can only be driven to stably drop the goods on the ground and then adjust the position of the goods on the forklift, so that the efficiency of the position adjusting mode is lower, and the efficiency of goods carrying is influenced. In addition, if the forklift for forking the goods places the goods at the front position of the forklift side in a narrow space, the forklift cannot freely steer in the narrow space due to the limitation of the space, so that the goods on the forklift cannot be smoothly placed at the front position of the forklift side; in view of the above disadvantages of the conventional forklift, a new forklift needs to be designed.

The invention designs a logistics transportation device to solve the problems.

Disclosure of Invention

In order to solve the defects in the prior art, the invention discloses a logistics transportation device which is realized by adopting the following technical scheme.

In the description of the present invention, it should be noted that the terms "inside", "outside", "upper", "lower", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or orientations or positional relationships that the products of the present invention conventionally use, which are merely for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, or be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used merely to distinguish one description from another, and are not to be construed as indicating or implying relative importance.

A logistics transportation device is characterized in that: the forklift truck comprises a truck body provided with a portal frame and a fork mechanism, wherein the fork mechanism vertically slides on the portal frame at the front end of the truck body.

The fork mechanism comprises a fork frame, a sliding block, an electric drive module A, an electric drive module B, a square rod, a telescopic plate, a carrier roller, a one-way clutch, a gear E, a gear C, a ring sleeve A, a clamping block A, a ring sleeve B, a clamping block B, a rack A, a rack B and a gear D, wherein the fork frame vertically slides on a portal frame; the sliding blocks driven by the electric drive module A and the electric drive module B respectively vertically slide on the front plate surface of the fork frame; a shaft A is arranged on the front end face of each sliding block; in a normal state, the two sliding blocks are symmetrical left and right, and the two axes A are symmetrical left and right; a square rod is rotatably matched on each shaft A, and the two square rods are connected through two telescopic plates which are symmetrical front and back; the four carrier roller holes are parallel to the telescopic direction of the telescopic plates and uniformly rotate between the two telescopic plates at intervals, and two ends of a shaft B arranged on each carrier roller are respectively in rotary fit with the two telescopic plates; two shafts B are rotationally matched with the outer plates of the two telescopic plates, and the other two shafts B are rotationally matched with the inner plates of the two telescopic plates; one ends of the two square rods close to the sliding blocks are respectively provided with a ring sleeve A which is rotationally matched with the corresponding shaft A; the outer cylindrical surface of each ring sleeve A is rotatably matched with a ring sleeve B; two clamping blocks A which are uniformly distributed on each ring sleeve A in the circumferential direction are respectively matched with two clamping blocks B which are uniformly distributed on the corresponding ring sleeve B in the circumferential direction.

One end of each shaft B close to the sliding block is provided with a one-way clutch, and each one-way clutch is provided with a gear E; the gears E on the two shafts B which are in rotating fit with the outer plate of the expansion plate are simultaneously meshed with the gear D arranged on the outer plate of the expansion plate; the gears E on the two shafts B which are rotationally matched with the inner telescopic plate are simultaneously meshed with the gear C arranged on the inner telescopic plate; a rack B arranged on a ring sleeve B positioned at the end of the inner plate of the telescopic plate is matched with the lower end of a gear D, and a rack A arranged on the other ring sleeve B is matched with the lower end of a gear C; under normal state, a limiting block arranged on the fork frame supports a rack A and a rack B to be in a horizontal state, and the rack A and the rack B are respectively meshed with a gear C and a gear D.

As a further improvement of the technology, the inner wall of the ring sleeve B is circumferentially provided with a ring groove; two clamping blocks B arranged on the ring sleeve B are positioned in the corresponding ring grooves; two clamping blocks A arranged on the ring sleeve A are positioned on the outer cylindrical surface of the ring sleeve A, and the two clamping blocks A on the ring sleeve A are simultaneously positioned in the ring grooves on the inner wall of the corresponding ring sleeve B.

As a further improvement of the technology, the part of the inner plate of the telescopic plate sliding in the outer plate of the telescopic plate is U-shaped; two shafts B which are rotationally matched with the outer telescopic plate are matched with the U-shaped end of the inner telescopic plate; the inner plate end of the telescopic plate is connected with the square rod on one side of the gear A, and the outer plate end of the telescopic plate is connected with the square rod on one side of the gear B. The U-shaped part on the inner plate of the expansion plate avoids the expansion plate from being interfered by two shafts B which are rotationally matched with the outer plate of the expansion plate in the expansion process.

As a further improvement of the technology, the two sliding blocks are both provided with a trapezoidal guide block; the two trapezoidal guide blocks vertically slide in the two trapezoidal guide grooves on the front plate surface of the fork frame respectively. The trapezoidal guide block is matched with the trapezoidal guide groove to play a role in positioning and guiding the vertical movement of the sliding block along the fork frame.

As a further improvement of the present technology, the above electric drive module a and electric drive module B are respectively mounted on both sides of the fork; a toothed plate A is arranged on the outer side surface of the sliding block near the gear C, and a toothed plate B is arranged on the outer side surface of the sliding block near the gear D; the pinion rack A is meshed with a gear A installed on an output shaft of the electric drive module A, and the pinion rack B is meshed with a gear B installed on an output shaft of the electric drive module B.

As a further improvement of the technology, the specification parameters of the gear a are the same as those of the gear B, and the specification parameters of the gear C are the same as those of the gear D, so that the rotation speeds of the carrier rollers are the same no matter which direction the pallet fork mechanism inclines to two sides, and further the speed and effect of the carrier rollers in different rotation directions for adjusting the goods are the same, and the situation that one side is faster in adjustment speed and the other side is slower in adjustment speed is avoided.

As a further improvement of the technology, the carrier roller has elasticity, the surface of the carrier roller is higher than the upper surfaces of the square rods, so that when goods are positioned on the plurality of support pipes, the goods deform the surface of the carrier roller, the bottom of the goods can be in contact with the upper surfaces of the two square rods, the upper surfaces of the square rods can effectively support the goods, the goods are more stable in the carrying process, meanwhile, the contact area between the deformed carrier roller and the goods is increased, the carrier roller is favorable for supporting the goods, the deformable carrier roller is selected for being favorable for increasing the friction between the goods and the carrier roller, the goods are not easy to slide relative to the square rods due to jolt in the carrying process, and the stability of goods carrying is further ensured; in addition, have elastic bearing roller and take place the deformation back under the action of goods pressure, when the adjustment goods position, under the effect of the bearing roller that has warp, the speed that the goods sideslips along the square pole surface can not be very big, is favorable to the slow adjustment of goods position, only carries out slow adjustment to the goods, just the excessive condition of goods position adjustment can not appear, improves the efficiency of goods position adjustment indirectly.

Compared with the traditional forklift, the cargo position of the center of gravity on the four carrier rollers is adjusted by driving the square frame formed by the two square rods and the two expansion plates to swing through the electric drive module A or the electric drive module B, the square rod close to the center of gravity of the deviated cargo rotates around the corresponding shaft A while synchronously and vertically moving upwards along the corresponding shaft A under the driving of the electric drive module A or the electric drive module B, and the square frame formed by the two square rods and the two expansion plates swings upwards around the other shaft A, so that the whole cargo is inclined at a proper angle; in the process that goods are driven by the square rods, the telescopic plate and the carrier rollers to incline, the electric drive module A or the electric drive module B drives the two carrier rollers on the same side to rotate through a series of transmission, and the two rotating carrier rollers drive the goods to move downwards in the inclining direction of the telescopic plate to the middle position between the two square rods; when goods are about to reach the middle position between the two square rods, the frame formed by the two square rods and the two telescopic plates is reset under the reverse driving of the electric driving module A or the electric driving module B, in the resetting process, the goods continue to move to the middle position between the two square rods under the combined action of gravity and motion inertia, and meanwhile the goods drive the four carrier rollers to continue to rotate along the same direction; when the frame that two square poles and two expansion plates formed just reset, the goods reachd middle part position department between two square poles basically to realize fork truck in the adjustment of the position of carrying the goods that the skew takes place to the dead in-process, avoid the goods that takes place the skew to continue the skew and the goods damage that the landing caused owing to jolting repeatedly in the handling. In addition, compared with the traditional forklift, the invention can unload the goods to the front side fixed position in a narrow space; when goods are unloaded to the front side of the narrow space limited by free steering, the electric drive module A or the electric drive module B drives the frame formed by the two square rods and the two telescopic plates to incline through a series of transmission, the goods slide down obliquely along the inclination direction of the telescopic plates to the front position of the side of the vehicle body quickly, and then the unloading and stacking work of the goods to the front position of the side of the vehicle body can be completed through small movement of workers; compared with the traditional forklift, the forklift can unload the goods in a narrow space with limited steering, saves a large amount of manpower to a certain extent, and has higher efficiency of unloading the goods; the invention has simple structure and better use effect.

Drawings

Fig. 1 is an overall schematic view of a forklift.

FIG. 2 is a schematic view of a fork mechanism.

FIG. 3 is a cross-sectional view of the yoke, slider, shaft A, collar B, rack A, gear C, gear E, one-way clutch, gear D and rack B.

FIG. 4 is a cross-sectional view of the ring groove A, the latch B and the ring B.

Fig. 5 is a schematic diagram of the matching of the rack a, the rack B and the limiting block.

Fig. 6 is a schematic cross-sectional view of the fitting of the ring sleeve B and the latch B.

Fig. 7 is a schematic view of the ring sleeve a and the fixture block a.

FIG. 8 is a cross-sectional view of the extension plate and shaft B.

Fig. 9 is a schematic cross-sectional view of the square bar, expansion plate, shaft B and idler engagement.

FIG. 10 is a schematic view of the axis A, the slider and the trapezoidal guide block.

Fig. 11 is a schematic perspective view of a fork.

Fig. 12 is a schematic cross-sectional view of the expansion plate and its components.

Number designation in the figures: 1. a vehicle body; 2. a gantry; 3. a fork mechanism; 4. a fork; 5. a trapezoidal guide groove; 6. a slider; 7. a toothed plate A; 8. a trapezoidal guide block; 9. an axis A; 10. a toothed plate B; 11. an electric drive module A; 12. a gear A; 13. an electric drive module B; 14. a gear B; 15. a square bar; 17. a retractable plate; 18. a shaft B; 19. a carrier roller; 20. a one-way clutch; 21. a gear E; 22. a gear C; 23. a ring sleeve A; 24. a clamping block A; 25. a ring sleeve B; 26. a clamping block B; 27. a rack A; 28. a rack B; 29. a limiting block; 30. a ring groove; 31. an outer plate; 32. an inner plate; 33. and a gear D.

Detailed Description

The drawings are schematic illustrations of the implementation of the present invention to facilitate understanding of the principles of structural operation. The specific product structure and the proportional size are determined according to the use environment and the conventional technology.

As shown in fig. 1, it includes a vehicle body 1 mounted with a mast 2 and a fork mechanism 3, wherein the fork mechanism 3 is vertically slid on the mast 2 at the front end of the vehicle body 1.

As shown in fig. 2 and 3, the fork mechanism 3 includes a fork carriage 4, a slider 6, an electric drive module a11, an electric drive module B13, a square bar 15, a telescopic plate 17, a carrier roller 19, a one-way clutch 20, a gear E21, a gear C22, a ring sleeve a23, a latch a24, a ring sleeve B25, a latch B26, a rack a27, a rack B28 and a gear D33, wherein the fork carriage 4 slides vertically on the mast 2 as shown in fig. 1; as shown in fig. 2, the slide 6, driven by the electric drive module a11 and the electric drive module B13 respectively, slides vertically on the front plate surface of the fork carriage 4; as shown in fig. 3 and 10, a shaft a9 is mounted on the front end face of each slide block 6; as shown in fig. 2 and 3, in the normal state, the two sliders 6 are bilaterally symmetrical, and the two axes a9 are bilaterally symmetrical; as shown in fig. 3 and 4, a square bar 15 is rotatably fitted on each axis a 9; as shown in fig. 3, 5 and 9, the two square rods 15 are connected by two expansion plates 17 which are symmetrical front and back; as shown in fig. 2 and 9, the four support rollers 19 are uniformly and alternately rotated between the two telescopic plates 17 in parallel with the telescopic direction of the telescopic plates 17, and two ends of a shaft B18 installed on each support roller 19 are respectively in rotating fit with the two telescopic plates 17; as shown in fig. 8 and 9, two shafts B18 are rotatably engaged with the outer plates 31 of the two telescopic plates 17, and the other two shafts B18 are rotatably engaged with the inner plates 32 of the two telescopic plates 17; as shown in fig. 3, 4 and 5, the ends of the two square rods 15 close to the sliding block 6 are respectively provided with a ring sleeve a23 which is rotatably matched with the corresponding shaft a 9; the outer cylindrical surface of each ring sleeve A23 is rotatably matched with a ring sleeve B25; two clamping blocks A24 uniformly distributed on the circumference of each ring sleeve A23 are matched with two clamping blocks B26 uniformly distributed on the circumference of the corresponding ring sleeve B25 respectively.

As shown in fig. 3 and 4, one end of each shaft B18 near the slide 6 is provided with a one-way clutch 20, and each one-way clutch 20 is provided with a gear E21; the gears E21 on the two shafts B18 which are rotatably matched with the outer plate 31 of the telescopic plate 17 are simultaneously meshed with the gear D33 arranged on the outer plate 31 of the telescopic plate 17; the gear E21 on the two shafts B18 which are rotationally engaged with the inner plate 32 of the telescopic plate 17 is simultaneously meshed with the gear C22 mounted on the inner plate 32 of the telescopic plate 17; as shown in fig. 4 and 5, a rack B28 mounted on a ring sleeve B25 at the plate end of the inner plate 32 of the telescopic plate 17 is matched with the lower end of a gear D33, and a rack a27 mounted on another ring sleeve B25 is matched with the lower end of a gear C22; in a normal state, the stopper 29 mounted on the fork 4 supports the rack a27 and the rack B28 in a horizontal state, and the rack a27 and the rack B28 are engaged with the gear C22 and the gear D33, respectively.

As shown in fig. 6, the inner wall of the ring sleeve B25 is circumferentially provided with a ring groove 30; as shown in fig. 3, 4 and 7, two blocks B26 mounted on the ring sleeve B25 are positioned in the corresponding ring grooves 30; two clips A24 mounted on ring A23 are located on the outer cylindrical surface of ring A23, and two clips A24 on ring A23 are simultaneously located in ring grooves 30 on the inner wall of corresponding ring B25.

As shown in fig. 8 and 12, the inner plate 32 of the telescopic plate 17 is U-shaped in the portion sliding on the outer plate 31 of the telescopic plate 17; two shafts B18 rotatably engaged with the outer plate 31 of the telescopic plate 17 are engaged with the U-shaped ends of the inner plates 32 of the telescopic plate 17; as shown in fig. 2 and 3, the inner plate 32 of the telescopic plate 17 has a plate end connected to the square bar 15 on the side of the gear a12, and the outer plate 31 of the telescopic plate 17 has a plate end connected to the square bar 15 on the side of the gear B14. The U-shaped portion of the inner plate 32 of the telescopic plate 17 avoids the telescopic plate 17 from interfering with the two axes B18 which are rotationally engaged with the outer plate 31 of the telescopic plate 17 during the telescopic process.

As shown in fig. 10, the two sliders 6 are each provided with a trapezoidal guide block 8; as shown in fig. 3 and 11, two trapezoidal guide blocks 8 vertically slide in two trapezoidal guide grooves 5 on the front plate surface of the fork 4. The matching of the trapezoidal guide block 8 and the trapezoidal guide groove 5 plays a role in positioning and guiding the vertical movement of the slide block 6 along the fork 4.

As shown in fig. 2, the electric drive module a11 and the electric drive module B13 are respectively installed on both sides of the fork 4; as shown in fig. 2, 3 and 5, a toothed plate a7 is mounted on the outer side surface of the sliding block 6 near the gear C22, and a toothed plate B10 is mounted on the outer side surface of the sliding block 6 near the gear D33; tooth plate a7 meshes with gear a12 mounted on the output shaft of electric drive module a11 and tooth plate B10 meshes with gear B14 mounted on the output shaft of electric drive module B13.

As shown in FIG. 2, the specification parameters of the gear A12 are the same as those of the gear B14; as shown in fig. 3 and 4, the specification parameters of the gear C22 are the same as those of the gear D33, so that the rotation speeds of the carrier rollers 19 are equal no matter which direction the pallet fork mechanism 3 inclines to, and further, the speed and effect of adjusting the pallet by the carrier rollers 19 in different rotation directions are the same, and the situation that the adjustment speed is faster on one side and slower on the other side is avoided.

As shown in fig. 4 and 9, the carrier roller 19 has elasticity, the surface of the carrier roller 19 is higher than the upper surfaces of the square bars 15, so that when a cargo is positioned on a plurality of support pipes, the cargo deforms the surface of the carrier roller 19, the bottom of the cargo can be in contact with the upper surfaces of the two square bars 15, the upper surfaces of the square bars 15 can effectively support the cargo, the cargo is more stable in the carrying process, meanwhile, the contact area between the deformed carrier roller 19 and the cargo is increased, the carrier roller 19 is beneficial to supporting the cargo, and the deformable carrier roller is selected to help to increase the friction between the cargo and the carrier roller, so that the cargo is not easy to slide relative to the square bars 15 due to bumping in the carrying process, and the stability of cargo carrying is further ensured; in addition, have elastic bearing roller 19 and take place the deformation back under the action of goods pressure, when the adjustment goods position, under the effect of bearing roller 19 that has warp, the speed that the goods sideslips along the 15 surface of square beam can not be very big, is favorable to the slow adjustment of goods position, only carries out slow adjustment to the goods, just can not appear the excessive condition of goods position adjustment, indirectly improves the efficiency of goods position adjustment.

The vehicle body 1 provided with the portal frame 2 adopts the prior art.

The electric drive module a, the electric drive module B13 and the one-way clutch 20 of the present invention are all prior art. The electric drive module A11 and the electric drive module B13 are composed of a self-locking motor, a speed reducer and a control unit.

The vertical sliding of the fork carriage 4 relative to the mast 2 in the present invention is known in the art.

The working process of the invention is as follows: in an initial state, the lowermost end of the gear C22 is meshed with the rack A27, and the lowermost end of the gear D33 is meshed with the rack B28; the rack A27 and the rack B28 are in horizontal positions, and the limit block 29 supports the rack A27 and the rack B28; the frame formed by the two square rods 15 and the two expansion plates 17 is in a horizontal state; the two sliding blocks 6 are symmetrically distributed and are simultaneously and respectively positioned at the bottoms of the corresponding trapezoidal guide grooves 5; the two expansion plates 17 which are symmetrical front and back are in a contraction state; the two fixture blocks A24 on each ring A23 are respectively contacted with the two fixture blocks B26 in the corresponding ring B25; the direction of the ring sleeve A23 positioned on one side of the gear A12 for driving the corresponding ring sleeve B25 to synchronously rotate through the interaction of the two clamping blocks A24 arranged on the ring sleeve A23 and the two clamping blocks B26 arranged in the corresponding ring sleeve B25 is opposite to the direction of the ring sleeve A23 positioned on one side of the gear B14 for driving the corresponding ring sleeve B25 to synchronously rotate through the interaction of the two clamping blocks A24 arranged on the ring sleeve A23 and the two clamping blocks B26 arranged in the corresponding ring sleeve B.

When the present invention is used for carrying goods, if the center of gravity of the goods on the two square bars 15 and the four idlers 19 is not located at the central position between the two square bars 15 due to jolting or an incorrect initial placement position, etc., it is necessary to adjust the positions of the goods on the square bars 15 and the idlers 19 in order to prevent the goods, the center of gravity of which is shifted from the central position between the two square bars 15, from sliding off the square bars 15 and the idlers 19 under the continuous jolting; the adjustment process of the cargo position comprises the following steps:

if the center of gravity of the cargo deviates to one side of the gear A12, the electric drive module A11 is driven to operate, and the electric drive module A11 drives the gear A12 to rotate; the gear a12 drives the corresponding slide block 6 to move vertically upwards along the corresponding trapezoidal guide groove 5 through the interaction with the toothed plate a 7; the slide block 6 moving vertically upwards drives the corresponding square rod 15 to move upwards synchronously through the corresponding shaft A9; because the two square rods 15 are connected through the two telescopic plates 17 which are symmetrical front and back, and the two square rods 15 are respectively in rotating fit with the corresponding shafts A9, the shaft A9 which moves upwards drives the frame formed by the two square rods 15 and the two telescopic plates 17 to swing upwards around the other shaft A9, the two square rods 15 respectively rotate relative to the corresponding shafts A9 at the same time, and the rotating directions of the two square rods 15 relative to the corresponding shafts A9 are the same; at the same time, the two expansion plates 17 are stretched in order to accommodate the increase in the distance between the two square bars 15; during the upward swinging of the two telescopic plates 17 about the axis a9 on the side of the gear B14, the inner plates 32 of the two telescopic plates 17 perform an extending motion simultaneously with respect to the corresponding outer plates 31, respectively.

Meanwhile, the ring sleeve A23 on one side of the gear A12 is driven by the corresponding square rod 15 to synchronously rotate relative to the corresponding shaft A9, and the ring sleeve A23 on one side of the gear B14 is driven by the corresponding square rod 15 to synchronously rotate relative to the corresponding shaft A9; two blocks A24 on the ring sleeve A23 on one side of the gear A12 are respectively separated from two blocks B26 arranged in the corresponding ring sleeve B25 and gradually separated from each other; because the two fixture blocks A24 on the ring sleeve A23 on one side of the gear A12 release the rotation limitation of the corresponding ring sleeve B25, the rack B28 drives the ring sleeve B25 fixedly connected with the rack B28 to swing downwards around the corresponding shaft A9 relative to the corresponding ring sleeve A23 under the action of self weight, the rack B28 is always kept in contact with the lower limit block 29, and the rack B28 is separated from the gear D33 and releases the meshing relation between the two. Because the direction of the ring sleeve A23 at one side of the gear A12 driving the corresponding ring sleeve B25 to synchronously rotate through the interaction of the two fixture blocks A24 mounted on the ring sleeve A23 and the two fixture blocks B26 mounted in the corresponding ring sleeve B25 is opposite to the direction of the ring sleeve A23 at one side of the gear B14 driving the corresponding ring sleeve B25 to synchronously rotate through the interaction of the two fixture blocks A24 mounted on the ring sleeve A25 and the two fixture blocks B26 mounted in the corresponding ring sleeve B, the ring sleeve A23 at one side of the gear B14 synchronously rotates along with the corresponding square rod 15, and simultaneously drives the corresponding ring sleeve B25 to synchronously rotate through the interaction of the two fixture blocks A24 mounted on the ring A35and the two fixture blocks B26 mounted in the corresponding ring sleeve B25; the rack A27 on the ring sleeve B25 arranged on one side of the gear B14 keeps the meshing relation with the gear C22, and the rack A27 is separated from the limit block 29 and gradually departs from the limit block 29; since the inner plate 32 of the telescopic plate 17 is now subjected to an elongation movement with respect to the outer plate 31, the gear C22 mounted on the inner plate 32 of the telescopic plate 17 is rotated by the rack a27, and the direction of rotation of the gear C22 is opposite to the direction of rotation of the two square bars 15 with respect to the respective axes a 9; the gear C22 drives the two gears E21 meshed with the gear C21 to rotate, the rotating direction of the two gears E21 is the same as the rotating direction of the two square rods 15 relative to the corresponding shaft A9, and because the two one-way clutches 20 of the two gears E21 meshed with the gear C22 play a one-way driving role at the moment, the two gears E21 meshed with the gear C22 drive the two shafts B18 in rotating fit with the telescopic inner plate 32 to synchronously rotate through the corresponding one-way clutches 20 respectively, and the two shafts B18 in rotating fit with the telescopic inner plate 32 drive the corresponding carrier rollers 19 to synchronously rotate respectively; when the goods synchronously swing along with the two telescopic plates 17, the two carrier rollers 19 rotating on the two shafts B18 in rotary fit with the telescopic inner plates 32 drive the goods above to obliquely move downwards along the inclined direction of the telescopic plates 17, and the gravity center of the goods moves towards the middle position between the two square rods 15; the moving goods simultaneously drive the other two carrier rollers 19 to rotate, and the two carrier rollers 19 simultaneously drive the two shafts B18 which are rotationally matched with the outer plate 31 of the telescopic plate 17 to synchronously rotate; at this time, since the two one-way clutches 20 on the two shafts B18 rotationally engaged with the outer plate 31 of the telescopic plate 17 perform a one-way driving function, the two shafts B18 rotationally engaged with the outer plate 31 of the telescopic plate 17 drive the corresponding two gears E21 to rotate synchronously through the corresponding one-way clutches 20, and the two gears E21 drive the gear D33 to idle.

When the swing angle of the frame formed by the two square rods 15 and the two telescopic plates 17 around the shaft A9 at one side of the gear B14 reaches about 5 degrees, the operation of the electric drive module A11 is stopped, and the gear A12 stops rotating; because the motors in the electric drive module A11 and the electric drive module B13 are self-locking motors, the slide block 6 with a higher position can not vertically slide downwards under the action of the gravity of the goods and the slide block 6, and the slide block 6 with a higher position can keep still at the height position; the frame formed by the two square rods 15 and the two telescopic plates 17 is stopped and kept in an inclined state of about 5 degrees, and at the moment, goods continuously and slowly move downwards along the inclined direction of the telescopic plates 17 under the combined action of self gravity and motion inertia; the goods drives the four carrier rollers 19 to continue rotating, two shafts B18 which are rotationally matched with the inner plate 32 of the telescopic plate 17 rotate synchronously with the corresponding carrier rollers 19 respectively, and because the two one-way clutches 20 where the two gears E21 which are meshed with the gear C22 are located play an overrunning role at the moment, the two shafts B18 which are rotationally matched with the inner plate 32 of the telescopic plate 17 cannot drive the two gears E21 which are meshed with the gear C22 to rotate through the corresponding one-way clutches 20; meanwhile, the two shafts B18 rotationally matched with the outer plate 31 of the telescopic plate 17 drive the two corresponding gears E21 to continuously and synchronously rotate through the corresponding one-way clutches 20 respectively, and the two gears E21 simultaneously drive the gear D33 to continuously idle.

When goods are about to reach the middle position between the two square bars 15 when the goods are inclined downwards relative to the square bars 15, the electric drive module A11 is controlled to run reversely, and the gear A12 rotates reversely and synchronously along with the output shaft of the electric drive module A11; the gear A12 drives the corresponding slide block 6 to reset through a toothed plate A7; the two square rods 15 respectively rotate reversely relative to the corresponding axis A9, and the distance between the two square rods 15 gradually approaches; the inner plates 32 of the two telescopic plates 17 perform a contraction movement with respect to the corresponding outer plates 31, respectively; under the action of the rack A27, the gear C22 rotates reversely, and the gear C22 drives the two gears E21 meshed with the gear C3526 to rotate reversely; meanwhile, the goods continue to move obliquely downwards along the inclined direction of the expansion plate 17 under the combined action of the gravity and the inertia of the goods, and the goods continue to drive the four carrier rollers 19 to rotate; the inner rings of the two one-way clutches 20 in which the two gears E21 meshed with the gear C22 are located continuously rotate along the corresponding shafts B18 respectively, the rotating directions of the two gears E21 which are coaxial with the rotating directions of the two gears E3526 are opposite, and the two one-way clutches 20 in which the two gears E21 meshed with the gear C22 are located play an overrunning role at the moment, so that the rotation of the gear C22 does not interfere with the rotation of the carrier rollers 19 on the corresponding two shafts B18; meanwhile, the two shafts B18 rotationally matched with the outer plate 31 of the telescopic plate 17 drive the two corresponding gears E21 to continuously and synchronously rotate through the corresponding one-way clutches 20 respectively, and the two gears E21 simultaneously drive the gear D33 to continuously idle. In the process of resetting the square rod 15 and the telescopic plate 17, the ring sleeve A23 on one side of the gear A12 is reversely reset along with the corresponding square rod 15, and the two fixture blocks A24 on the ring sleeve A23 are gradually close to the two fixture blocks B26 in the corresponding ring sleeve B25 and finally contact with the two fixture blocks B26 in the corresponding ring sleeve B25; the ring sleeve A23 on one side of the gear B14 is reversely returned along with the corresponding square rod 15, and the ring sleeve B25 rotating on the ring sleeve A23 is synchronously reversely returned along with the ring sleeve A23 under the gravity action of the rack A27.

When the two square rods 15 and the two telescopic plates 17 are completely reset, the rack A27 is in contact with the limiting block 29 again, and the rack B28 is meshed with the gear D33 again; at this time, the goods basically stop at the middle position of the square rod 15, and the goods are continuously conveyed after the adjustment of the goods position is completed.

If the gravity center of the cargo deviates to one side of the gear B14, the electric drive module B13 is driven to operate, and the gear B14 synchronously rotating with the output shaft of the electric drive module B13 drives the corresponding sliding block 6 to vertically move upwards along the corresponding trapezoidal guide groove 5 through the toothed plate B10; the specific process is the same as the principle of the previous process, except that the electric drive module A11 in the previous process is changed into the electric drive module B13, the electric drive module B13 is changed into the electric drive module A11, the gear A12 is changed into the gear B14, the gear B14 is changed into the gear A12, the gear C22 is changed into the gear D33, and the gear D33 is changed into the gear C22, which are not described herein again.

When the forklift needs to unload towards the front side of the forklift body 1, the specific process is the same as the position adjustment process of the goods, but the sliding of the goods and the resetting of the equipment are different, and the final swinging angle of the frame formed by the two square rods 15 and the two telescopic plates 17 driven by the electric drive module A11 or the electric drive module B13 through a series of transmission is far greater than the swinging angle of the frame formed by the two square rods 15 and the two telescopic plates 17 during the position adjustment of the goods, so that the goods can smoothly slide down from the square rods 15 and the carrier rollers 19 to the auxiliary carrying tool on the ground; the goods slide to the ground and the resetting process of the equipment when the forklift is unloaded is as follows:

when the frame formed by the two square rods 15 and the two telescopic plates 17 swings to a proper large angle, if the square rod 15 on one side of the gear A12 tilts upwards, the operation of the electric drive module A11 is stopped, the frame formed by the two square rods 15 and the two telescopic plates 17 stops swinging, and the gear C22 meshed with the rack A27 stops rotating; if the square bar 15 on one side of the gear B14 is tilted upwards, the operation of the electric drive module B13 is stopped, the two square bars 15 and the frame formed by the two telescopic plates 17 stop swinging, and the gear D33 meshed with the rack B28 stops rotating. Under the combined action of the self weight of the goods and the motion inertia, the goods start to rapidly move downwards in an inclined way and finally fall onto a tool which is used for assisting the manual moving of the goods on the ground; in the process that the goods start to accelerate and move obliquely downwards, the speed at which the goods drive the four carrier rollers 19 to rotate is increased, and the four carrier rollers 19 respectively and simultaneously drive the corresponding shafts B18 to rotate at an increased speed; if the gear C22 is meshed with the rack A27 at the moment, the two one-way clutches 20 where the two gears E21 meshed with the gear C22 are located play an overrunning role, the two carrier rollers 19 arranged on the two shafts B18 which are rotationally matched with the inner plate 32 of the telescopic plate 17 drive the inner rings of the two corresponding one-way clutches 20 to rapidly rotate through the corresponding shafts B18 respectively, and the gear C22 which stops rotating does not interfere with the rotation of the two carrier rollers 19 corresponding to the gear C22 at the moment; the two shafts B18 rotatably engaged with the outer plate 31 of the telescopic plate 17 drive the two corresponding gears E21 to continuously rotate synchronously through the corresponding one-way clutches 20, and the two gears E21 simultaneously drive the gear D33 to continuously perform fast idle rotation. If the gear D33 is meshed with the rack B28 at the moment, the two one-way clutches 20 where the two gears E21 meshed with the gear D33 are located play an overrunning role, the two carrier rollers 19 arranged on the two shafts B18 in rotary fit with the outer plate 31 of the telescopic plate 17 drive the inner rings of the two corresponding one-way clutches 20 to rotate rapidly through the corresponding shafts B18 respectively, and the gear D33 stopping rotating does not interfere with the rotation of the two carrier rollers 19 corresponding to the gear D33 at the moment; at this time, the two shafts B18 rotationally engaged with the inner plate 32 of the telescopic plate 17 drive the two corresponding gears E21 to continuously rotate synchronously through the corresponding one-way clutches 20, and the two gears E21 simultaneously drive the gear D33 to continuously perform fast idle rotation.

After the goods are completely separated from the four carrier rollers 19, the four carrier rollers 19 are quickly stopped rotating under the action of friction force, and the idle gear D33 or the idle gear C22 is gradually stopped rotating under the action of friction force. At this time, if the gear C22 is meshed with the rack A27, the electric drive module A11 is controlled to rotate reversely, and the electric drive module A11 drives the gear A12 to rotate reversely; the gear A12 drives the corresponding slide block 6 to reset through the toothed plate A7; a shaft A9 at one side of the gear A12 drives a frame formed by the two square rods 15 and the two telescopic plates 17 to reset and swing; in the process, the rack A27 drives the gear C22 to rotate reversely, the two one-way clutches 20 where the two gears E21 meshed with the gear C22 are located play an overrunning role, the two gears E21 meshed with the gear C22 cannot drive the two corresponding shafts B18 to rotate through the corresponding one-way clutches 20, and the two corresponding carrier rollers 19 do not rotate; the two idlers 19 corresponding to the gear D33 do not rotate; in the process of resetting the square rod 15 and the telescopic plate 17, the ring sleeve A23 on one side of the gear A12 is reversely reset along with the corresponding square rod 15, and the two fixture blocks A24 on the ring sleeve A23 are gradually close to the two fixture blocks B26 in the corresponding ring sleeve B25 and finally contact with the two fixture blocks B26 in the corresponding ring sleeve B25; the ring sleeve A23 on one side of the gear B14 is reversely returned along with the corresponding square rod 15, and the ring sleeve B25 rotating on the ring sleeve A23 is synchronously reversely returned along with the ring sleeve A23 under the gravity action of the rack A27. If the gear D33 is meshed with the rack B28, the electric drive module B13 is controlled to rotate reversely, and the electric drive module B13 drives the gear B14 to rotate reversely; the gear B14 drives the corresponding slide block 6 to perform reset motion through the toothed plate B10; a shaft A9 at one side of the gear B14 drives a frame formed by the two square rods 15 and the two telescopic plates 17 to reset and swing; in the process, the rack B28 drives the gear D33 to rotate reversely, the two one-way clutches 20 where the two gears E21 meshed with the gear D33 are located play an overrunning role, the two gears E21 meshed with the gear D33 cannot drive the two corresponding shafts B18 to rotate through the corresponding one-way clutches 20, and the two corresponding carrier rollers 19 do not rotate; the two idlers 19 corresponding to the gear C22 rotate; in the process of resetting the square rod 15 and the telescopic plate 17, the ring sleeve A23 on one side of the gear B14 is reversely reset along with the corresponding square rod 15, and the two fixture blocks A24 on the ring sleeve A23 are gradually close to the two fixture blocks B26 in the corresponding ring sleeve B25 and finally contact with the two fixture blocks B26 in the corresponding ring sleeve B25; the ring sleeve A23 on one side of the gear A12 is reversely returned along with the corresponding square rod 15, and the ring sleeve B25 rotating on the ring sleeve A23 is synchronously reversely returned along with the ring sleeve A23 under the gravity action of the rack B28.

When the two square rods 15 and the two telescopic plates 17 are completely reset, if the square rod 15 on one side of the gear A12 is reset by upwarping and falling, the rack A27 is contacted with the limiting block 29 again, and the rack B28 is meshed with the gear D33 again; if the square rod 15 on one side of the gear B14 is reset by tilting upwards and falling downwards, the rack A27 is contacted with the limit block 29 again, and the rack B28 is meshed with the gear D33 again.

When goods are carried under a normal state, a square frame formed by the two square rods 15 and the two telescopic plates 17 is in a horizontal state, the gear C22 is meshed with the rack A27, and the gear D33 is meshed with the rack B28; because the directions of the unidirectional driving action of the two unidirectional clutches 20 corresponding to the gear C22 and the unidirectional driving action of the two unidirectional clutches 20 corresponding to the gear D33 are opposite, once the goods on the four carrier rollers 19 slide relative to the carrier rollers 19 under the repeated bumping action, two rollers always do not rotate under the prevention of the two unidirectional clutches 20 which exert the unidirectional driving action, effective sliding friction is formed between the two carrier rollers 19 which do not rotate and the goods, so that the goods are prevented from sliding to slide relative to the carrier rollers 19, and the goods are prevented from being damaged due to sliding to the ground in the carrying process.

In conclusion, the beneficial effects of the invention are as follows: the invention adjusts the position of the cargo with the deviated gravity center position on four supporting rollers 19 by driving the square frames formed by the two square rods 15 and the two telescopic plates 17 to swing through the electric drive module A11 or the electric drive module B13, the square rod 15 which is closer to the gravity center of the deviated cargo rotates around the corresponding shaft A9 while synchronously moving vertically and upwards along with the corresponding shaft A9 under the driving of the electric drive module A11 or the electric drive module B13, and the square frames formed by the two square rods 15 and the two telescopic plates 17 swing upwards around the other shaft A9, so that the cargo is integrally inclined at a proper angle; in the process that goods are driven by the square rods 15, the telescopic plate 17 and the carrier rollers 19 to incline, the electric drive module A11 or the electric drive module B13 drives the two carrier rollers 19 on the same side to rotate through a series of transmission, and the two rotating carrier rollers 19 drive the goods to move downwards in the inclining direction of the telescopic plate 17 to the middle position between the two square rods 15; when goods are about to reach the middle position between the two square rods 15, the frame formed by the two square rods 15 and the two telescopic plates 17 is reset under the reverse driving of the electric driving module A11 or the electric driving module B13, in the resetting process, the goods continue to move to the middle position between the two square rods 15 under the combined action of gravity and motion inertia, and meanwhile the goods drive the four carrier rollers 19 to continue to rotate along the same direction; when the frame that two square poles 15 and two expansion plates 17 formed just reset, the goods reachd middle part position department between two square poles 15 basically to realize fork truck in the adjustment of the position of carrying the goods that the skew takes place for the gravity center, avoid the goods that takes place the skew to continue the skew and the goods damage that the landing caused owing to jolting repeatedly in the handling. In addition, compared with the traditional forklift, the invention can unload the goods to the front side fixed position in a narrow space; when goods are unloaded to the front side of the narrow space with limited free steering, the electric drive module A11 or the electric drive module B13 drives the frame formed by the two square rods 15 and the two telescopic plates 17 to incline through a series of transmission, the goods quickly slide down to the front side of the vehicle body 1 along the inclined direction of the telescopic plates 17, and then the unloading and stacking work of the goods to the front side of the vehicle body 1 can be completed through small movement of workers; compared with the traditional forklift, the forklift can unload the goods in a narrow space with limited steering, saves a large amount of manpower to a certain extent, and has higher efficiency of unloading the goods.

Claims

1. A logistics transportation device is characterized in that: the forklift truck comprises a truck body provided with a portal and a fork mechanism, wherein the fork mechanism vertically slides on the portal at the front end of the truck body;

the fork mechanism comprises a fork frame, a sliding block, an electric drive module A, an electric drive module B, a square rod, a telescopic plate, a carrier roller, a one-way clutch, a gear E, a gear C, a ring sleeve A, a clamping block A, a ring sleeve B, a clamping block B, a rack A, a rack B and a gear D, wherein the fork frame vertically slides on a portal frame; the sliding blocks driven by the electric drive module A and the electric drive module B respectively vertically slide on the front plate surface of the fork frame; a shaft A is arranged on the front end face of each sliding block; in a normal state, the two sliding blocks are symmetrical left and right, and the two axes A are symmetrical left and right; a square rod is rotatably matched on each shaft A, and the two square rods are connected through two telescopic plates which are symmetrical front and back; the four carrier roller holes are parallel to the telescopic direction of the telescopic plates and uniformly rotate between the two telescopic plates at intervals, and two ends of a shaft B arranged on each carrier roller are respectively in rotary fit with the two telescopic plates; two shafts B are rotationally matched with the outer plates of the two telescopic plates, and the other two shafts B are rotationally matched with the inner plates of the two telescopic plates; one ends of the two square rods close to the sliding blocks are respectively provided with a ring sleeve A which is rotationally matched with the corresponding shaft A; the outer cylindrical surface of each ring sleeve A is rotatably matched with a ring sleeve B; two clamping blocks A which are uniformly distributed on each ring sleeve A in the circumferential direction are respectively matched with two clamping blocks B which are uniformly distributed on the corresponding ring sleeve B in the circumferential direction;

2. The logistics transportation device of claim 1, wherein: the inner wall of the ring sleeve B is circumferentially provided with a ring groove; two clamping blocks B arranged on the ring sleeve B are positioned in the corresponding ring grooves; two clamping blocks A arranged on the ring sleeve A are positioned on the outer cylindrical surface of the ring sleeve A, and the two clamping blocks A on the ring sleeve A are simultaneously positioned in the ring grooves on the inner wall of the corresponding ring sleeve B.

3. The logistics transportation device of claim 1, wherein: the part of the inner plate of the telescopic plate sliding in the outer plate of the telescopic plate is U-shaped; two shafts B which are rotationally matched with the outer telescopic plate are matched with the U-shaped end of the inner telescopic plate; the inner plate end of the telescopic plate is connected with the square rod on one side of the gear A, and the outer plate end of the telescopic plate is connected with the square rod on one side of the gear B.

4. The logistics transportation device of claim 1, wherein: trapezoidal guide blocks are arranged on the two sliding blocks; the two trapezoidal guide blocks vertically slide in the two trapezoidal guide grooves on the front plate surface of the fork frame respectively.

5. The logistics transportation device of claim 1, wherein: the electric drive module A and the electric drive module B are respectively arranged at two sides of the fork frame; a toothed plate A is arranged on the outer side surface of the sliding block near the gear C, and a toothed plate B is arranged on the outer side surface of the sliding block near the gear D; the pinion rack A is meshed with a gear A installed on an output shaft of the electric drive module A, and the pinion rack B is meshed with a gear B installed on an output shaft of the electric drive module B.

6. The logistics transportation device of claim 1, wherein: the specification parameters of the gear A are the same as those of the gear B; the specification parameters of the gear C are the same as those of the gear D.

7. The logistics transportation device of claim 1, wherein: the carrier roller has elasticity, and the surface of carrier roller is higher than the upper surface of square bar.