A tray stacking device

Abstract

This utility model relates to a tray stacking device, comprising: a lifting mechanism, which includes: a base plate, a first driving member connected to the base plate, a lead screw assembly connected to the output end of the first driving member, and a lifting platform connected to the output end of the lead screw assembly; a buffer mechanism, which includes: buffer brackets respectively disposed on both sides of the lifting platform, a second driving member disposed on the buffer brackets, and a support plate connected to the second driving member; and a lifting mechanism, which includes: a third driving member connected to the output end of the second driving member, and a separation plate connected to the output end of the third driving member. Through the above-described configuration, this utility model can separate the bottom tray in a multi-layered tray system, achieving layer-by-layer separation of multi-layered trays, while reducing the movement space required for tray retrieval and increasing the compactness of the device.

Description

Technical Field

[0001] This utility model relates to the field of conveying equipment technology, and in particular to a tray stacking device. Background Technology

[0002] In modern automated production lines, for products that require repeated processing, the processed products are typically temporarily stored on pallets, and then the pallets and their contents are placed in a buffer mechanism to await the next processing. Pallet stacking devices are the core equipment for achieving efficient pallet separation, temporary storage, and transfer. Their function is to separate stacked pallets layer by layer into independent units, providing precise material supply for subsequent assembly, packaging, or handling processes. They must meet the core requirements of precise separation, efficient circulation, compact structure, and adaptability to various pallet retrieval methods.

[0003] However, traditional tray stacking devices have the following key drawbacks, which severely restrict production line efficiency and space utilization: when removing the stacked trays, they need to be taken from top to bottom, resulting in an excessively long path for picking up components. This not only leads to excessive space occupation of the device, but also reduces the picking efficiency. Utility Model Content

[0004] Therefore, the technical problem to be solved by this utility model is to overcome the problem that in the prior art, when taking away the tray, it is necessary to take it away from top to bottom, which results in an excessively long moving path for the components to be taken away. This not only leads to an excessively large space occupied by the device, but also reduces the taking-away efficiency. Thus, a tray stacking device is provided.

[0005] To solve the above-mentioned technical problems, this utility model provides a tray stacking device, comprising:

[0006] A lifting mechanism includes: a base plate, a first drive member connected to the base plate, a lead screw assembly connected to the output end of the first drive member, and a lifting platform connected to the output end of the lead screw assembly.

[0007] The buffer mechanism includes: buffer brackets respectively disposed on both sides of the lifting platform, a second drive component disposed on the buffer brackets, and a support plate connected to the second drive component;

[0008] The lifting mechanism includes: a third drive member connected to the output end of the second drive member, and a separation plate connected to the output end of the third drive member. The lifting platform and the separation plate are both movable along the height direction of the disc mechanism, and the pallet and the separation plate are both movable along the width direction of the disc mechanism. The separation plate moves between the pallet and the lifting platform.

[0009] In one embodiment of the present invention, the lead screw assembly includes: a support base mounted on the base plate, a bearing seat mounted on the support base, a nut seat mounted on the lifting platform, and a drive lead screw adapted to the nut seat and rotatably connected to the support base via the bearing seat. The lifting platform has an clearance hole with a size larger than that of the drive lead screw.

[0010] In one embodiment of this utility model, the drive screw passes through the nut seat and the bearing seat, the end of the drive screw is provided with a first synchronous pulley, the output end of the first drive member is connected to a second synchronous pulley, and the first and second synchronous pulleys are fitted with a synchronous belt.

[0011] In one embodiment of this utility model, the base plate is provided with a linear bearing, the end of the linear bearing is connected to the lifting platform, the lifting platform is provided with a first sensor, the first sensor is located between the lifting platform and the base plate and the detection path passes through the avoidance hole.

[0012] In one embodiment of the present invention, a second sensor is provided between the base plate and the lifting platform. The second sensor includes: a support plate disposed on the base plate, a plurality of detection heads disposed at intervals along the height direction on the support plate, and a sensing sheet disposed on the lifting platform and capable of corresponding to each of the detection heads. The lifting platform is provided with a first clearance groove adapted to the support plate.

[0013] In one embodiment of this utility model, the buffer bracket is provided with a sliding pair, the sliding pair is connected to a movable plate, the movable plate is connected to the output end of the second driving member, and the support plate and the third driving member are both connected to the movable plate.

[0014] In one embodiment of this utility model, the buffer bracket is fixedly provided with a buffer member, the movable plate is provided with a stop member, and the end of the buffer member can abut against the stop member.

[0015] In one embodiment of this utility model, the buffer bracket is provided with a guide rod that extends along the height direction.

[0016] In one embodiment of the present invention, the end of the tray is provided with a protrusion, and the end face of the protrusion is provided with a guide slope.

[0017] In one embodiment of the present invention, the buffer bracket is provided with a third sensor for detecting whether there is a tray on the tray and / or whether the tray is empty, and the buffer bracket is provided with a second clearance groove for detection by the third sensor.

[0018] Compared with the prior art, the above-mentioned technical solution of this utility model has the following beneficial effects:

[0019] The present invention discloses a tray stacking device in which a second driving member drives a pallet to extend into the bottom of a tray above a separating plate, and the separating plate simultaneously extends into the bottommost tray. This creates a state where the separating plate supports the bottommost tray and the pallet supports the next-lowest tray. A third driving member drives the separating plate downwards, causing the bottommost pallet to descend, creating a sufficient height gap between the bottommost and next-lowest trays. The bottommost pallet is not subjected to pressure from the upper trays, facilitating its removal manually, by a robotic arm, or by suction cups. After the bottommost tray is removed, the previously bottommost tray becomes the new bottommost tray. The lifting platform can then be driven to abut the new bottommost tray, driving the second driving member to retract the pallet and separating plate. The lifting platform is then driven upwards to align the pallet and separating plate with the new bottommost and next-lowest trays. Repeating these steps allows for the separation of the bottommost tray from multiple layers of trays, achieving layer-by-layer separation. This also reduces the movement space required for tray removal, increasing the device's compactness. Attached Figure Description

[0020] To make the content of this utility model easier to understand, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0021] Figure 1 This is a schematic diagram of the structure of the tray stacking device of this utility model;

[0022] Figure 2 This is a cross-sectional view of the stacking device of this utility model;

[0023] Figure 3 This is a cross-sectional view of the stacking device of this utility model from another angle;

[0024] Figure 4 This is a cross-sectional view of the lifting mechanism of this utility model.

[0025] Explanation of reference numerals in the accompanying drawings: 1. Base plate; 2. First drive component; 3. Lifting platform; 4. Linear bearing; 5. Tray; 6. Guide rod; 7. Buffer bracket; 8. Nut seat; 9. Support seat; 10. Bearing seat; 11. Second drive component; 12. Buffer component; 13. Sliding pair; 14. Movable plate; 15. Support plate; 16. Protrusion; 17. Stop component; 18. Third drive component; 19. Separation plate; 20. First synchronous pulley; 21. Synchronous belt; 22. Second synchronous pulley; 23. Clearance hole; 24. Drive screw. Detailed Implementation

[0026] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, so that those skilled in the art can better understand and implement the present invention. However, the embodiments are not intended to limit the present invention.

[0027] Example

[0028] Reference Figures 1-4 As shown, a tray stacking device of this utility model includes:

[0029] The lifting mechanism includes: a base plate 1, a first drive member 2 connected to the base plate 1, a lead screw assembly connected to the output end of the first drive member 2, and a lifting platform 3 connected to the output end of the lead screw assembly.

[0030] The buffer mechanism includes: buffer brackets 7 respectively disposed on both sides of the lifting platform 3, a second drive component 11 disposed on the buffer brackets 7, and a support plate 15 connected to the second drive component 11;

[0031] The lifting mechanism includes a third drive member 18 connected to the output end of the second drive member 11 and a separation plate 19 connected to the output end of the third drive member 18. The lifting platform 3 and the separation plate 19 are both movable along the height direction of the disc mechanism, and the pallet 15 and the separation plate 19 are both movable along the width direction of the disc mechanism. The separation plate 19 moves between the pallet 15 and the lifting platform 3.

[0032] The tray stacking device of this utility model involves transporting the upstream tray 5 to the lifting platform 3 via a robotic arm, transfer trolley, conveyor belt, etc. The first driving component 2 then lifts the tray 5, stacking it on the lifting platform 3. The first driving component 2 continues to drive the lead screw 24 assembly, raising the lifting platform 3 to the separation height. The third driving component 18 then drives the separation plate 19, aligning the bottom layer of the tray 5 stack with the height of the lifting platform 3, and simultaneously aligning the bottom layer of the tray 5 stack with the next bottom layer with the support plate 15, thus supporting the next bottom layer tray 5. During this process, the lifting platform 3 can be slightly lowered to allow the bottom layer tray 5 to be adapted to the height of the separation plate 19 and the support plate 15. The second driving component 11 then drives the support plate 15 to extend into the separation plate 19. At the bottom of the tray 5 above 9, the separating plate 19 extends synchronously into the bottom tray 5; forming a state where the separating plate 19 supports the bottom tray 5 and the tray 15 supports the next bottom tray 5. By driving the third driving member 18 downward, the separating plate 19 drives the bottom tray 15 to descend, so that the bottom tray 15 and the next bottom tray 15 have a sufficient height gap space, and the bottom tray 15 is not pressured by the upper tray 15, making it easy to remove the bottom tray 5 by manually, robotically, or by suction cups.

[0033] After removing the bottommost tray 5, the original bottommost tray 5 becomes the new bottommost tray 5. At this point, the lifting platform 3 can be driven to abut under the new bottommost tray 5, driving the second driving component 11 to retract the pallet 15 and the separating plate 19. The lifting platform 3 is then driven to rise, aligning the pallet 15 and the separating plate 19 with the new bottommost and second-bottommost pallets 15. Repeating the above steps completes the separation of the bottommost tray 5 from multiple layers of trays 5, achieving layer-by-layer separation of multiple layers of trays 5. This also reduces the movement space required for removing the trays, increasing the compactness of the device.

[0034] The lead screw assembly includes: a support base 9 mounted on the base plate 1, a bearing seat 10 mounted on the support base 9, a nut seat 8 mounted on the lifting platform 3, and a drive lead screw 24 adapted to the nut seat 8 and rotatably connected to the support base 9 via the bearing seat 10. The lifting platform 3 has a clearance hole 23 larger than the drive lead screw 24. The support base 9 is vertically fixed to the top surface of the base plate 1, providing rigid support for the bearing seat 10. The bearing seat 10 is fixed to the side of the support base 9 by bolts, realizing the rotational support of the drive lead screw 24. The lower end of the drive lead screw 24 passes through the inner hole of the bearing seat 10 and is rotatably connected to the support base 9 via the bearing, ensuring no radial offset during rotation. The nut seat 8 is fixed below the lifting platform 3 and has an internal thread adapted to the drive lead screw 24. When the drive lead screw 24 rotates, the nut seat 8 moves linearly along the height direction, driving the lifting platform 3 to rise and fall. The clearance hole 23 is used to prevent the lifting platform 3 from colliding with the drive lead screw 24 when it descends, and at the same time provides operating space for the installation and maintenance of the lead screw assembly.

[0035] The drive screw 24 passes through the nut seat 8 and the bearing seat 10. A first synchronous pulley 20 is provided at the end of the drive screw 24. A second synchronous pulley 22 is connected to the output end of the first drive component 2. A synchronous belt 21 is fitted onto the first and second synchronous pulleys 20 and 22. The first synchronous pulley 20 is fixed to the lower end of the drive screw 24 by a key connection or a tension sleeve, and its tooth profile matches the synchronous belt 21. The second synchronous pulley 22 is fixed to the end of the output shaft of the first drive component 2. The synchronous belt 21 is fitted around the outer circumference of the two synchronous pulleys, transmitting power through tooth meshing. Compared to gear or chain drives, the synchronous belt 21 drive has the following advantages: high transmission accuracy: no slippage error in tooth meshing, ensuring that the rotation angle of the first drive component 2 is completely consistent with that of the drive screw 24; low noise: rubber or polyurethane material avoids metal impact noise, suitable for quiet environments; convenient maintenance: no lubrication required, low replacement cost; overload protection: the synchronous belt 21 slips when encountering obstacles, preventing damage to the drive component or screw assembly.

[0036] The base plate 1 is equipped with a linear bearing 4, the end of which is connected to the lifting platform 3. The lifting platform 3 is equipped with a first sensor, which is located between the lifting platform 3 and the base plate 1, and its detection path passes through the clearance hole 23. The linear bearing 4 is vertically fixed to the top surface of the base plate 1, and its upper end is fixedly connected to the bottom surface of the lifting platform 3. A linear guide rail or ball bearing is installed inside. When the lifting platform 3 rises or falls, the linear bearing 4 moves linearly along the Z-direction, providing additional guidance for the lifting platform 3 and preventing tilting due to uneven load, thus ensuring that the top surface of the lifting platform 3 is level. The first sensor is a photoelectric proximity sensor, installed between the lifting platform 3 and the base plate 1, and its detection path passes through the clearance hole 23. When the lifting platform 3 rises to the bottom of the pallet 5 stack, the presence of the pallet 5 is detected, facilitating the control of the first drive component 2.

[0037] A second sensor is disposed between the base plate 1 and the lifting platform 3. The second sensor includes: a support plate disposed on the base plate 1; multiple detection heads spaced apart along the height direction on the support plate; and a sensing plate disposed on the lifting platform 3, corresponding to each detection head. The lifting platform 3 has a first clearance groove adapted to the support plate. The support plate is vertically fixed to the top surface of the base plate 1 and is made of high-strength metal. Multiple detection heads, such as 3-5, are fixed at intervals along the height direction on the side of the support plate, with the spacing adjusted according to the separation height accuracy and position. The sensing plate is fixed to the side of the lifting platform 3, its position corresponding to the detection heads. When the lifting platform 3 rises or falls, the sensing plate moves with it, sequentially triggering detection heads at different heights, such as photoelectric or Hall sensors. The control system accurately determines the height position of the lifting platform 3 through the trigger signals from the detection heads, ensuring the accuracy of the separation height. The first clearance groove on the lifting platform 3 prevents collision between the support plate and the lifting platform 3.

[0038] The buffer bracket 7 is provided with a sliding pair 13, which is connected to a movable plate 14. The movable plate 14 is connected to the output end of the second drive component 11. The support plate 15 and the third drive component 18 are both connected to the movable plate 14. The sliding pair 13 is a linear guide slider assembly, fixed to the buffer bracket 7. The functions of the movable plate 14 include: ensuring motion accuracy: guiding the movement through the sliding pair 13 to prevent the support plate 15 from deviating from the separation plate 19; load distribution: evenly transmitting the driving force of the second drive component 11 to the support plate 15 and the third drive component 18; modular design: integrating the support plate 15 and the third drive component 18 into a module for easy installation and maintenance.

[0039] The buffer bracket 7 is fixedly equipped with a buffer member 12, and the movable plate 14 is equipped with a stop member 17. The end of the buffer member 12 can abut against the stop member 17. To prevent the movable plate 14 from rigidly colliding with the buffer bracket 7 when it moves to its limit position, this mechanism is equipped with a buffer member 12 and a stop member 17. The buffer member 12 is fixed to the buffer bracket 7, corresponding to the end of the movement path of the movable plate 14, and is usually a hydraulic damper, which has the advantages of good buffering effect and long service life. Its axis is in the width direction. The stop member 17 is a metal block, fixed to the movable plate 14 and positioned corresponding to the buffer member 12. When the movable plate 14 moves to its limit position, the stop member 17 contacts the end of the buffer member 12. The hydraulic damping of the hydraulic damper absorbs the kinetic energy, avoids rigid collision, protects the movable plate 14, the second drive member 11, and the sliding pair 13, and extends the service life of the components.

[0040] The buffer support 7 is equipped with guide rods 6, which extend along the height direction. To ensure the accuracy of the multi-layer pallet 5 in the height direction, the mechanism provides guide rods 6 on the buffer support 7. The guide rods 6 are fixed to one end of the top of the buffer support 7 along the height direction, that is, the side away from the upstream material, with a spacing not greater than the size of the pallet 5. The guide rods are made of high-strength stainless steel and limit and guide the multi-layer pallet 5 and prevent the pallet 5 from tipping over or tilting under inertia.

[0041] The end of the pallet 15 is provided with a protrusion 16, and the end face of the protrusion 16 is provided with a guide slope. To improve the lifting stability and ease of insertion of the pallet 15, this mechanism provides a protrusion 16 and a guide slope at the end of the pallet 15. The protrusion 16 is an extension structure of the end of the pallet 15, arranged along the length of the pallet 15. When the pallet 15 is inserted into the bottom of the secondary bottom tray 5, the protrusion 16 inserts into the bottom groove or between the support legs of the tray 5, increasing the contact area, improving lifting stability, and preventing the tray 5 from tilting. The guide slope is provided on the front end face of the protrusion 16, with an inclination angle of 15°~30°. This prevents the front end of the pallet 15 from rigidly colliding with the bottom of the tray 5, reducing component wear.

[0042] The buffer bracket 7 is equipped with a third sensor for detecting whether the tray 5 is on the pallet 15 and / or whether the tray 5 is empty. The buffer bracket 7 has a second clearance groove for the third sensor to detect. To achieve real-time monitoring of the status of the tray 5, this mechanism is equipped with a third sensor and a second clearance groove. The third sensor is a photoelectric sensor fixed to the buffer bracket 7, with the detection head aligned above the tray 15. Its functions include: lifting position detection: after the tray 15 extends into the second-bottom tray 5, if the presence of the tray 5 is detected, a signal is sent to confirm that the tray is lifted in place; empty tray detection: detecting whether the tray 5 is the correct tray 5; fault warning: if the tray 5 is not detected but a lifting command has been issued, a fault signal is issued and the equipment is stopped.

[0043] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the scope of protection of this invention.

Claims

1. A tray stacking device, characterized in that, include: A lifting mechanism includes: a base plate, a first drive member connected to the base plate, a lead screw assembly connected to the output end of the first drive member, and a lifting platform connected to the output end of the lead screw assembly. The buffer mechanism includes: buffer brackets respectively disposed on both sides of the lifting platform, a second drive component disposed on the buffer brackets, and a support plate connected to the second drive component; The lifting mechanism includes: a third drive member connected to the output end of the second drive member, and a separation plate connected to the output end of the third drive member. The lifting platform and the separation plate are both movable along the height direction of the disc mechanism, and the pallet and the separation plate are both movable along the width direction of the disc mechanism. The separation plate moves between the pallet and the lifting platform.

2. The tray stacking device according to claim 1, characterized in that: The lead screw assembly includes: a support base mounted on the base plate, a bearing seat mounted on the support base, a nut seat mounted on the lifting platform, and a drive lead screw adapted to the nut seat and rotatably connected to the support base via the bearing seat. The lifting platform has an clearance hole with a size larger than that of the drive lead screw.

3. The tray stacking device according to claim 2, characterized in that: The drive screw passes through the nut seat and the bearing seat. A first synchronous pulley is provided at the end of the drive screw. A second synchronous pulley is connected to the output end of the first drive component. A synchronous belt is fitted onto the first and second synchronous pulleys.

4. The tray stacking device according to claim 1, characterized in that: The base plate is equipped with a linear bearing, the end of which is connected to the lifting platform. The lifting platform is equipped with a first sensor, which is located between the lifting platform and the base plate and its detection path passes through an avoidance hole.

5. The tray stacking device according to claim 1, characterized in that: A second sensor is provided between the base plate and the lifting platform. The second sensor includes: a support plate provided on the base plate, a plurality of detection heads spaced apart and arranged on the support plate along the height direction, and a sensing sheet provided on the lifting platform that can correspond to each of the detection heads. The lifting platform has a first clearance groove adapted to the support plate.

6. The tray stacking device according to claim 1, characterized in that: The buffer bracket is provided with a sliding pair, the sliding pair is connected to a movable plate, the movable plate is connected to the output end of the second driving component, and the support plate and the third driving component are both connected to the movable plate.

7. A tray stacking device according to claim 6, characterized in that: The buffer bracket is fixedly provided with a buffer component, the movable plate is provided with a stop component, and the end of the buffer component can abut against the stop component.

8. The tray stacking device according to claim 1, characterized in that: The cache support is provided with a guide rod that extends along the height direction.

9. A tray stacking device according to claim 1, characterized in that: The end of the pallet is provided with a protrusion, and the end face of the protrusion is provided with a guide slope.

10. A tray stacking device according to claim 1, characterized in that: The buffer bracket is equipped with a third sensor for detecting whether there is a tray on the tray and / or whether the tray is empty. The buffer bracket has a second clearance groove for detection by the third sensor.

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