Bidirectional telescopic plate fork of stacking machine

Abstract

The bidirectional telescopic plate fork of the stacking machine comprises a plate fork upper plate, a plate fork middle plate and a plate fork bottom plate, the plate fork upper plate is installed on the plate fork middle plate in a sliding mode, and the plate fork middle plate is installed on the plate fork bottom plate in a sliding mode. The two ends of the plate fork middle plate are provided with inwards-concave installation parts, belt wheel bases are arranged in the installation parts, and belt wheels are rotationally installed in the belt wheel bases. A fixing plate is arranged at one end of the belt pulley seat and is connected with the belt pulley seat through an adjustable screw; the fixing plate is fixed to the end of the plate fork middle plate, a buffer block is arranged between the fixing plate and the end of the plate fork middle plate, a first belt is wound around the belt pulley at the left end of the plate fork middle plate, and a second belt is wound around the belt pulley at the left end of the plate fork middle plate. When the belt is tightened and the plate fork moves towards the opposite direction, the belt is tightened instantly due to tensile force, then the belt generates counter-acting force and acts on the belt pulley seat, and the buffer block plays a role in buffer protection between the fixed block at one end of the belt pulley seat and the end part of the middle plate of the plate fork.

Description

Technical Field

[0001] This utility model belongs to the technical field of intelligent warehousing and logistics, specifically a bidirectional telescopic pallet fork for a stacker crane. Background Technology

[0002] Stacker cranes are widely used in intelligent warehousing and logistics, and are an important component of material handling equipment. Stacker cranes are fixed to tracks and use PLC programs to control the traveling and lifting mechanisms to reach the designated cargo compartment positions. Telescopic forks then complete the storage and retrieval of goods.

[0003] The invention patent with patent number 202123396562.7 discloses a three-stage telescopic fork and a stacker crane, including a primary fork; a secondary fork slidably connected to the primary fork; a tertiary fork slidably connected to the secondary fork; and a synchronization component connected to the primary fork, the secondary fork, and the tertiary fork respectively; wherein, the synchronization component is used to drive the primary fork and the secondary fork to slide synchronously.

[0004] In the patent disclosure, the first and second synchronous pulleys are respectively located on both sides of the sliding direction of the secondary fork. The first synchronous belt is wound around the first synchronous pulley, and the second synchronous belt is wound around the second synchronous pulley. During operation, either the first or second synchronous belt may become loose, affecting the extension and retraction efficiency of the forks, causing unnecessary trouble in production, and increasing maintenance costs. Summary of the Invention

[0005] This utility model addresses the aforementioned technical problems by providing a bidirectional telescopic fork for a stacker crane, which can adjust the tension of the pulleys, reduce wear between parts, and extend the service life of the device.

[0006] The technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows: a bidirectional telescopic pallet fork for a stacker crane, comprising an upper pallet fork plate, a middle pallet fork plate, and a bottom pallet fork plate. The upper pallet fork plate is slidably mounted on the middle pallet fork plate, and the middle pallet fork plate is slidably mounted on the bottom pallet fork plate. The middle pallet fork plate has inwardly recessed mounting portions at both ends, and a pulley seat is provided in the mounting portion. A pulley is rotatably mounted in the pulley seat. A fixing plate is provided at one end of the pulley seat, and the pulley seat and the fixing plate are connected by an adjustable screw. The fixing plate is fixed to the end of the middle pallet fork plate, and a buffer block is provided between the fixing plate and the end of the middle pallet fork plate. A first belt is wound around the pulley at the left end of the middle pallet fork plate, and a second belt is wound around the pulley at the left end of the middle pallet fork plate.

[0007] To optimize the above technical solution, the present invention also includes the following improved technical solutions.

[0008] One end of the first belt is connected to the right end of the upper plate of the fork, and the other end of the first belt is connected to the right end of the bottom plate of the fork; one end of the second belt is connected to the left end of the upper plate of the fork, and the other end of the second belt is connected to the left end of the bottom plate of the fork.

[0009] The upper plate of the fork has a first through hole at its right end, and the lower plate of the fork has a second through hole at its right end; the upper plate of the fork has a third through hole at its left end, and the lower plate of the fork has a fourth through hole at its left end.

[0010] The position of the pulley seat at the left end of the middle plate of the fork is staggered from the position of the pulley seat at the right end of the middle plate of the fork. The positions of the first through hole and the third through hole on the upper plate of the fork are staggered from each other. The positions of the second through hole and the fourth through hole on the bottom plate of the fork are staggered from each other.

[0011] The first driving wheel and the first driven wheel are rotatably mounted on the lower ends of the bottom plate of the fork, and a double-sided synchronous belt is fitted on the first driving wheel and the first driven wheel; a drive motor is provided below the bottom plate of the fork, and the drive motor is connected to a reducer, which is connected to the first driving wheel.

[0012] The bottom plate of the fork is rotatably mounted with a first synchronous pulley and a second synchronous pulley at both ends. A double-sided synchronous belt is fitted onto the first synchronous pulley and the second synchronous pulley. The lower surface of the middle plate of the fork is provided with a toothed plate that mates with the double-sided synchronous belt.

[0013] The lower surface of the upper plate of the fork is equipped with a first guide rail, the upper surface of the middle plate of the fork is equipped with a second guide rail that mates with the first guide rail, the lower surface of the middle plate of the fork is equipped with a third guide rail, and the upper surface of the bottom plate of the fork is equipped with a fourth guide rail that mates with the third guide rail.

[0014] The upper plate of the fork is provided with protrusions at both ends for hooking goods, and the upper plate of the fork is provided with first photoelectric sensors at both ends for detecting whether the fork extends a sufficient distance.

[0015] The left and right ends of the fork base plate are equipped with second photoelectric sensors for detecting whether there are goods on the shelf; fork side plates are installed on the front and rear sides of the fork base plate, and the ends of the fork side plates are equipped with third photoelectric sensors for detecting whether the forks have picked up the goods; and the lower left and right ends of the fork base plate are equipped with fourth photoelectric sensors for detecting whether the forks have returned to their original positions and whether the goods have flown out or fallen during the operation of the forks.

[0016] The left end of the platen fork is provided with two sets of pulley seats, and a first belt is wound inside each of the two sets of pulley seats at the left end of the platen fork; the right end of the platen fork is provided with two sets of pulley seats, and a second belt is wound inside each of the two sets of pulley seats at the right end of the platen fork.

[0017] Compared with the prior art, the bidirectional telescopic pallet fork of the stacker crane of this utility model, when the belt is taut and the pallet fork moves in the opposite direction, the belt is pulled and tightened for a moment. Then the belt generates a reaction force and acts on the pulley seat. The buffer block between the fixed block at one end of the pulley seat and the end of the middle plate of the pallet fork plays a buffering and protective role, reducing maintenance costs and extending service life. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of this embodiment.

[0019] Figure 2 yes Figure 1 Exploded view of the structure.

[0020] Figure 3 This is an exploded view of the structure of the plate fork base plate.

[0021] Figure 4 This is an exploded view of the structure of the plate in the fork. Detailed Implementation

[0022] The embodiments of this utility model will be described in further detail below with reference to the accompanying drawings.

[0023] Figures 1 to 4 The diagram shown is a structural schematic of this utility model.

[0024] The reference numerals in the attached drawings are as follows: 1. Upper plate of the fork; 1a. First through hole; 1b. Third through hole; 2. Middle plate of the fork; 2a. Mounting part; 3. Bottom plate of the fork; 3a. Second through hole; 3b. Fourth through hole; 4. First guide rail; 5. Second guide rail; 6. Third guide rail; 7. Fourth guide rail; 8. Pulley seat; 9. Pulley; 10. First belt; 11. Second belt; 12. Fixing plate; 13. Adjustable screw; 14. Buffer block; 15. First driving wheel; 16. First driven wheel; 17. Double-sided synchronous belt; 18. Drive motor; 19. Reducer; 20. First synchronous wheel; 21. Second synchronous wheel; 22. Toothed plate; 23. Protrusion; 24. First photoelectric sensor; 25. Second photoelectric sensor; 26. Side plate of the fork; 27. Third photoelectric sensor; 28. Fourth photoelectric sensor.

[0025] The present invention relates to a bidirectional telescopic pallet fork for a stacker crane, comprising an upper pallet fork plate 1, a middle pallet fork plate 2, and a bottom pallet fork plate 3. The upper pallet fork plate 1 is slidably mounted on the middle pallet fork plate 2, and the middle pallet fork plate 2 is slidably mounted on the bottom pallet fork plate 3.

[0026] The upper plate 1 of the fork is equipped with a first guide rail 4 on the lower surface of both ends. The middle plate 2 of the fork is equipped with a second guide rail 5 that mates with the first guide rail 4 on the upper surface. The upper plate 1 of the fork can extend or retract relative to the middle plate 2 of the fork. The middle plate 2 of the fork is equipped with a third guide rail 6 on the lower surface of both ends. The bottom plate 3 of the fork is equipped with a fourth guide rail 7 that mates with the third guide rail 6 on the upper surface. The middle plate 2 of the fork can extend or retract relative to the bottom plate 3 of the fork.

[0027] The middle plate 2 of the fork has inwardly recessed mounting portions 2a at both ends. A pulley seat 8 is provided within the mounting portion 2a, and a pulley 9 is rotatably mounted within the pulley seat 8. A first belt 10 is wound around the pulley 9 at the left end of the middle plate 2, and a second belt 11 is wound around the pulley 9 at the left end of the middle plate 2. One end of the first belt 10 is connected to the right end of the upper plate 1 of the fork, and the other end of the first belt 10 is connected to the right end of the bottom plate 3 of the fork. One end of the second belt 11 is connected to the left end of the upper plate 1 of the fork, and the other end of the second belt 11 is connected to the left end of the bottom plate 3 of the fork.

[0028] A fixing plate 12 is provided at one end of the pulley seat 8 of the fork middle plate 2. The fixing plate 12 is installed at the end of the fork middle plate 2. An adjustable screw 13 is horizontally installed inside the fixing plate 12. The adjustable screw 13 passes through the fixing plate 12 and is connected to the pulley seat 8. Turning the adjustable screw 13 adjusts the position of the pulley seat 8 within the mounting part 2a, further adjusting the tension of the belt pulled by the pulley 9 inside the pulley seat 8. An internal set screw is vertically installed inside both the fixing plate 12 and the pulley seat 8. The internal set screw fixes the adjustable screw 13 to prevent it from loosening during operation. A buffer block 14 is provided between the fixing plate 12 and the end of the fork middle plate 2. The buffer block 14 is made of elastic rubber.

[0029] Considering the stability of the fork extension and retraction, the number of pulley seats 8 can be adjusted as needed. In this embodiment, two sets of pulley seats 8 are provided at the left end of the fork middle plate 2, and two sets of pulley seats 8 are provided at the right end of the fork middle plate 2. A first belt 10 is wound inside each of the two sets of pulley seats 8 at the left end of the fork middle plate 2. A second belt 11 is wound inside each of the two sets of pulley seats 8 at the right end of the fork middle plate 2.

[0030] A first through hole 1a is formed at the right end of the upper plate 1 of the fork, and a second through hole 3a is formed at the right end of the lower plate 3 of the fork. One end of the first belt 10 passes through the first through hole 1a and is fixed to the upper surface of the upper plate 1 of the fork, and the other end of the first belt 10 passes through the second through hole 3a and is fixed to the lower surface of the lower plate 3 of the fork. A third through hole 1b is formed at the left end of the upper plate 1 of the fork, and a fourth through hole 3b is formed at the left end of the lower plate 3 of the fork. One end of the second belt 11 passes through the third through hole 1b and is fixed to the upper surface of the upper plate 1 of the fork, and the other end of the second belt 11 passes through the fourth through hole 3b and is fixed to the lower surface of the lower plate 3 of the fork.

[0031] The position of the pulley seat 8 at the left end of the plate fork 2 is staggered from the position of the pulley seat 8 at the right end of the plate fork 2. The position of the first through hole 1a is staggered from the position of the third through hole 1b. The position of the second through hole 3a is staggered from the position of the fourth through hole 3b. This ensures that the first belt 10 and the second belt 11 will not interfere with each other during the extension and retraction of the plate fork, thus avoiding affecting the normal extension and retraction of the plate fork.

[0032] A first drive wheel 15 and a first driven wheel 16 are rotatably mounted at both ends of the fork base plate 3. A double-sided synchronous belt 17 is fitted onto the first drive wheel 15 and the first driven wheel 16. A drive motor 18 is located below the fork base plate 3, which can drive the double-sided synchronous belt 17 to move left and right. The drive motor 18 is connected to a reducer 19. The drive shaft of the drive motor 18 is connected to the input end of the reducer 19, and the output end of the reducer 19 is rotatably connected to the first drive wheel 15.

[0033] The bottom plate 3 of the fork is rotatably mounted with a first synchronous pulley 20 and a second synchronous pulley 21 at both ends. A double-sided synchronous belt 17 is fitted onto the first synchronous pulley 20 and the second synchronous pulley 21. The lower surface of the middle plate 2 of the fork is provided with a toothed plate 22 that mates with the double-sided synchronous belt 17. When the double-sided synchronous belt 17 moves to the left, the middle plate 2 of the fork extends to the left relative to the bottom plate 3 of the fork, and the first belt 10 and the second belt 11 drive the upper plate 1 of the fork to extend to the left relative to the middle plate 2 of the fork. When the double-sided synchronous belt 17 moves to the right, the middle plate 2 of the fork extends to the right relative to the bottom plate 3 of the fork, and the first belt 10 and the second belt 11 drive the upper plate 1 of the fork to extend to the right relative to the middle plate 2 of the fork.

[0034] Before the buffer block 14 is installed, in the initial state, the pulley 9 at the left end of the fork middle plate 2 tightens the first belt 10, and the pulley at the right end of the fork middle plate 2 tightens the second belt 11. The fork upper plate 1 and the fork middle plate 2 are located above the fork bottom plate 3. When the fork middle plate 2 extends to the left relative to the fork bottom plate 3, the pulley 9 at the left end of the fork middle plate 2 first exerts a momentary tension on the first belt 10, and then the first belt 10 generates a reaction force that acts on the pulley 9 at the left end of the fork middle plate 2. The pulley 9 at the left end of the fork middle plate 2 drives the pulley seat 8 at the left end of the fork middle plate 2 to move to the right within the mounting part 2a. The pulley seat 8 at the left end of the fork middle plate 2 drives the fixing block at the left end of the fork middle plate 2 to move to the right and collide with and wear against the end of the left end of the fork middle plate 2, making the adjustable screw 13 easy to loosen.

[0035] When the fork is extended to the left, the middle plate 2 of the fork extends to the left relative to the bottom plate 3, and the upper plate 1 of the fork extends to the left relative to the middle plate 2. When the fork retracts to the right, the pulley 9 at the right end of the middle plate 2 first exerts a momentary tension on the second belt 11, and then the second belt 11 generates a reaction force that acts on the pulley 9 at the right end of the middle plate 2. The pulley 9 at the right end of the middle plate 2 drives the pulley seat 8 at the right end of the middle plate 2 to move to the left within the mounting part 2a. The pulley seat 8 at the right end of the middle plate 2 drives the fixing block at the right end of the middle plate 2 to move to the left and collide with and wear against the end of the right end of the middle plate 2, making the adjustable screw 13 prone to loosening.

[0036] Similarly, in the initial state, when the middle plate 2 of the fork extends to the right relative to the bottom plate 3, the fixing block at the right end of the middle plate 2 collides and wears against the right end of the middle plate 2. With the fork extended to the right, the middle plate 2 extends to the right relative to the bottom plate 3, and the upper plate 1 extends to the right relative to the middle plate 2. When the fork retracts to the left, the fixing block at the left end of the middle plate 2 collides and wears against the left end of the middle plate 2.

[0037] After the buffer block 14 is installed, when the belt is taut and the plate fork moves in the opposite direction, the belt is pulled and tightened for a moment. Then the belt generates a reaction force and acts on the pulley seat 8. The buffer block 14 plays a buffering and protective role between the fixed block at one end of the pulley seat 8 and the end of the plate plate 2 of the plate fork, reducing maintenance costs and extending service life.

[0038] The upper plate 1 of the pallet fork has protrusions 23 at both ends for hooking goods. A first photoelectric sensor 24 is also located at both ends of the upper plate 1. When the pallet fork extends a specified distance, the first photoelectric sensor 24 detects whether it has extended sufficiently. The first photoelectric sensor 24 needs to exceed the box position to pick up the goods; if a box is detected above, an error will be reported. A second photoelectric sensor 25 is located at both ends of the bottom plate 3 of the pallet fork. The second photoelectric sensor 25 detects whether goods are placed on the shelf. If goods are detected, the pallet fork extends. Pallet fork side plates 26 are installed on the front and rear sides of the bottom plate 3. A third photoelectric sensor 27 is located at the end of the side plate 26. The third photoelectric sensor 27 detects whether the pallet fork has successfully picked up the goods. If successful, the pallet fork retracts. A fourth photoelectric sensor 28 is located below both ends of the bottom plate 3 of the pallet fork. The fourth photoelectric sensor 28 detects whether the forks have returned to their original position and whether goods fly out or fall during operation.

[0039] The preferred embodiment of this utility model has been described, and various changes or modifications made by those skilled in the art will not depart from the scope of this utility model.

Claims

1. A bidirectional telescopic fork of a stacker, comprising a fork upper plate (1), a fork middle plate (2) and a fork bottom plate (3), characterized in that: The plate fork upper plate (1) is slidingly installed on the plate fork middle plate (2), and the plate fork middle plate (2) is slidingly installed on the plate fork bottom plate (3); the plate fork middle plate (2) is provided with an inwardly recessed mounting portion (2a) at both ends, and a belt pulley seat (8) is arranged in the mounting portion (2a); the belt pulley seat (8) is rotatably installed with a belt pulley (9); one end of the belt pulley seat (8) is provided with a fixed plate (12), and the belt pulley seat (8) is connected with the fixed plate (12) through an adjustable screw (13); the fixed plate (12) is fixed on the end of the plate fork middle plate (2), and a buffer block (14) is arranged between the fixed plate (12) and the end of the plate fork middle plate (2); the belt pulley (9) at the left end of the plate fork middle plate (2) is wound with a first belt (10), and the belt pulley (9) at the left end of the plate fork middle plate (2) is wound with a second belt (11).

2. A telescoping shuttle according to claim 1, characterized in that: One end of the first belt (10) is connected with the right end of the plate fork upper plate (1), and the other end of the first belt (10) is connected with the right end of the plate fork bottom plate (3); one end of the second belt (11) is connected with the left end of the plate fork upper plate (1), and the other end of the second belt (11) is connected with the left end of the plate fork bottom plate (3).

3. A telescoping shuttle according to claim 2, wherein: The right end of the plate fork upper plate (1) is provided with a first through hole (1a), and the right end of the plate fork bottom plate (3) is provided with a second through hole (3a); the left end of the plate fork upper plate (1) is provided with a third through hole (1b), and the left end of the plate fork bottom plate (3) is provided with a fourth through hole (3b).

4. A telescoping shuttle according to claim 3, wherein: The positions of the belt pulley seats (8) at the left end and the right end of the plate fork middle plate (2) are staggered with each other, the positions of the first through hole (1a) and the third through hole (1b) on the plate fork upper plate (1) are staggered with each other, and the positions of the second through hole (3a) and the fourth through hole (3b) on the plate fork bottom plate (3) are staggered with each other.

5. A telescoping shuttle according to claim 4, wherein: First driving wheels (15) and first driven wheels (16) are rotatably installed at the lower ends of the plate fork bottom plate (3), and double-sided synchronous belts (17) are sleeved on the first driving wheels (15) and the first driven wheels (16); a driving motor (18) is arranged below the plate fork bottom plate (3), the driving motor (18) is connected with a speed reducer (19), and the speed reducer (19) is connected with the first driving wheels (15).

6. A telescoping shuttle according to claim 5, wherein: First synchronous wheels (20) and second synchronous wheels (21) are rotatably installed at the ends of the plate fork bottom plate (3), the double-sided synchronous belts (17) are sleeved on the first synchronous wheels (20) and the second synchronous wheels (21), and the lower surface of the plate fork middle plate (2) is provided with a toothed plate (22) matched with the double-sided synchronous belts (17).

7. A telescoping shuttle according to claim 6, wherein: A first guide rail (4) is installed on the lower surface of the plate fork upper plate (1), a second guide rail (5) matched with the first guide rail (4) is installed on the upper surface of the plate fork middle plate (2); a third guide rail (6) is installed on the lower surface of the plate fork middle plate (2), and a fourth guide rail (7) matched with the third guide rail (6) is installed on the upper surface of the plate fork bottom plate (3).

8. A telescoping shuttle according to claim 7, characterised in that: The left and right ends of the plate fork upper plate (1) are provided with protrusions (23) for hooking goods, and the left and right ends of the plate fork upper plate (1) are provided with first photoelectric sensors (24) for detecting whether the plate fork is extended by a sufficient distance.

9. A telescoping shuttle according to claim 8, characterised in that: The left and right ends of the plate fork bottom plate (3) are provided with second photoelectric sensors (25) for detecting whether goods are placed on the shelf; the front and rear sides of the plate fork bottom plate (3) are provided with plate fork side plates (26), and the end portions of the plate fork side plates (26) are provided with third photoelectric sensors (27) for detecting whether the plate fork forks goods; the lower portions of the left and right ends of the plate fork bottom plate (3) are provided with fourth photoelectric sensors (28) for detecting whether the goods fork returns to the original position and whether the goods fly out or fall during the operation of the plate fork.

10. A telescoping shuttle according to claim 9, characterized in that: The left end of the plate fork middle plate (2) is provided with two groups of belt pulley seats (8), and the two groups of belt pulley seats (8) at the left end of the plate fork middle plate (2) are both wound with first belts (10); the right end of the plate fork middle plate (2) is provided with two groups of belt pulley seats (8), and the two groups of belt pulley seats (8) at the right end of the plate fork middle plate (2) are both wound with second belts (11).

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