A tray transfer cart

Abstract

The utility model provides a tray transfer cart belongs to work piece processing equipment technical field to solve the problem of low transfer efficiency of the common dependence on manual single tray to complete the transfer operation in prior art, including the chassis, the bottom of chassis is equipped with the wheel, the top of chassis is equipped with two horizontal rods to place the tray, every horizontal rod is equipped with two spacer plates, every spacer plate's top is equipped with the spacer pin with the spacer hole on the tray cooperation, the spacer pin is set up vertically, the bottom of tray is equipped with the support pin, the top of tray is equipped with the slot that can support pin inserts. In the utility model, the batch loading and flexible transfer of the tray can be realized, the wheels ensure that the cart can move in different scenes, the spacer pin avoids the horizontal displacement of the tray, the support pin and the slot allow multiple trays to be safely stacked, and the number of trays transferred at a time is improved.

Description

Technical Field

[0001] This utility model belongs to the technical field of workpiece processing equipment, and specifically relates to a pallet transfer trolley. Background Technology

[0002] As the manufacturing industry transforms towards large-scale and efficient operations, the demand for batch processing of parts continues to rise. Improving the efficiency of the entire processing flow and reducing the costs and errors caused by manual intervention have become core optimization directions within the industry. Against this backdrop, automated processing equipment, with its stable operating performance and high-efficiency capabilities, has been widely adopted in various processing scenarios, including automotive parts, electronic components, and precision mechanical parts. Among these, the processing mode based on robotic arms for parts gripping and transfer has become one of the mainstream technical solutions in the field of batch parts processing due to its ability to significantly reduce manual operation steps, lower the rate of human error, and enable continuous operation through preset programs. In existing batch processing systems using robotic arms, specialized pallets are commonly used as the carrier unit for parts to achieve centralized storage, unified management, and efficient transfer of parts to be processed. These pallets are typically designed with matching positioning slots or limiting structures based on the structural characteristics of the parts, allowing multiple parts to be processed at once. This facilitates standardized storage of parts and provides a stable positioning reference for the robotic arm's subsequent precise gripping. During the processing, the robotic arm can pick up the parts to be processed one by one from the pallet according to a preset path and gripping parameters, and accurately transfer them to milling, drilling, grinding, and other processing stations to complete the corresponding processing operations. The processed parts can also be returned to the pallet by the robotic arm for centralized recycling. The overall workflow has achieved a high level of automation in the parts gripping and processing stages. However, current processing systems still have significant technical shortcomings in the pallet transfer process: due to the lack of supporting automated pallet transfer devices, existing technologies generally rely on manual handling of individual pallets to complete the transfer operation, resulting in low transfer efficiency and difficulty in meeting the needs of batch processing of parts. Utility Model Content

[0003] In view of this, the present invention provides a pallet transfer trolley to solve the problem of low transfer efficiency caused by the common reliance on manual handling of a single pallet in the prior art.

[0004] The technical solution adopted in this utility model is as follows: A pallet transfer trolley includes a base frame with wheels at the bottom and two crossbars spaced apart at the top for placing pallets. Each crossbar has two positioning plates spaced apart, and each positioning plate has a positioning pin at its top that mates with a positioning hole on the pallet. The positioning pins are vertically positioned. The bottom of the pallet has a support pin, and the top of the pallet has a slot into which the support pin can be inserted.

[0005] In this technical solution, it should be noted that the base frame is the basic load-bearing component of the entire trolley, used to support the crossbars, the tray, and the items on the tray; the wheels are installed at the bottom of the base frame to provide mobility for the trolley and facilitate overall transfer; the two spaced crossbars are the direct support components for the tray, used to bear the weight of the tray and ensure the stability of the tray; the two positioning plates on each crossbar are the fixing carriers for the positioning pins, used to determine the installation position of the positioning pins; the positioning pins are vertically set on the top of the positioning plates and can cooperate with the positioning holes on the tray to restrict the horizontal movement of the tray on the crossbars; the support pins at the bottom of the tray are the positioning components when the trays are stacked, and the slots at the top of the tray are the receiving components that cooperate with the support pins, used to accommodate the support pins of the upper tray. Overall Principle: The base frame bears all components and loads through its structural strength. Two spaced crossbars form a stable support surface. When a pallet is placed on the crossbar, the positioning pins of the positioning plate insert into the positioning holes of the pallet, fixing the pallet horizontally to the crossbar and preventing it from sliding. When multiple pallets need to be stacked, the support pins at the bottom of the upper pallet align with the slots at the top of the lower pallet and insert, allowing the upper and lower pallets to be positioned through the cooperation of the support pins and slots, forming a stable stacking structure. Overall Effect: This structure enables batch pallet carrying and flexible transfer. The wheels ensure that the trolley can move in different scenarios, the positioning pins prevent horizontal displacement of the pallets, and the support pins and slots allow multiple pallets to be stacked safely, increasing the number of pallets that can be transferred at one time.

[0006] Preferably, a vertical rod is provided on one side of the base frame, the top of the vertical rod being higher than the top of the base frame. A vertical shaft is provided at the top of the vertical rod, and a movable plate is fitted onto the vertical shaft. The bottom of the movable plate has a pin that mates with a positioning hole on the tray. The vertical shaft is threadedly connected to the vertical rod, and a knob is provided at the top of the vertical shaft, the diameter of which is larger than the diameter of the vertical shaft. A spring is also fitted onto the vertical shaft, one end of which contacts the knob, and the other end of which contacts the movable plate.

[0007] In this technical solution, it should be noted that the vertical rod is fixed to one side of the base frame, with its top higher than the top of the base frame. This provides a vertical mounting base for the vertical shaft and movable plate, ensuring that the movable plate and the bottom pin can cover the height of the topmost pallet, meeting the positioning requirements of the top pallet. The vertical shaft serves as a mounting reference for the movable plate, allowing it to move up and down and rotate around it. It also has a threaded connection to the vertical rod for easy disassembly. The movable plate is the direct mounting carrier for the pin, rising and falling with the height of the vertical shaft and rotating independently around it. Its core function is to drive the pin to align, insert, or offset with the positioning hole of the topmost pallet. The pin is used to position the topmost pallet; during transportation, it must be inserted into the positioning hole of the topmost pallet to limit pallet movement or horizontal offset. The knob increases the contact area for hand operation, facilitating the operator's rotation of the vertical shaft. The spring provides elastic pressure, generating a continuous downward thrust on the movable plate to ensure the pin is inserted into the positioning hole. Overall Principle: Before transporting the pallet, the operator lifts the movable plate and rotates it until the pin at the bottom of the movable plate aligns with the positioning hole of the top pallet. Then, the movable plate is released. The spring's elastic pressure then compresses the movable plate downwards, inserting the pin into the positioning hole, thus restraining the top pallet and preventing it from shifting during transport. When the trolley arrives at the workstation and the pallet needs to be removed, the operator lifts the movable plate again. The movable plate compresses the spring and moves upwards along the vertical axis, disengaging the pin from the positioning hole of the top pallet. After releasing the positioning constraint, the movable plate is rotated around the vertical axis to position the pin offset from the pallet, preventing it from obstructing pallet handling. The pallet can then be safely removed from the trolley. Overall Effect: This structure uses a pin to position the top pallet, effectively preventing pallet shifting. Upon reaching the workstation, simply lifting and rotating the movable plate releases the constraint. The operation is simple and convenient, meeting the stability requirements during transport and improving the efficiency of pallet handling at the workstation. It is suitable for various pallet transfer scenarios.

[0008] Preferably, a handrail is provided on one side of the vertical rod.

[0009] In this technical solution, it should be noted that the handle is fixed to one side of the vertical rod and is the force-applying component for the operator to control the cart, providing the operator with a stable grip point; at the same time, the handle also makes it easier for the operator to control the direction and speed of the cart's movement, preventing the cart from going out of control.

[0010] Preferably, the slot is a V-shaped groove, the bottom of the positioning pin is provided with a plug-in part, the plug-in part is spherical, and the diameter of the slot opening is larger than the diameter of the plug-in part.

[0011] In this technical solution, it should be noted that the V-groove of the slot is slightly larger than the diameter of the bottom spherical surface of the positioning pin. This way, it can be aligned as long as it is roughly aligned with the material tray, and the V-groove guides the upper positioning pin to fall into place.

[0012] Preferably, a guide wheel is rotatably connected to the bottom of the crossbar, and the diameter of the guide wheel is greater than the width of the crossbar.

[0013] In this technical solution, it should be noted that when the device arrives at the work station, the staff pushes the trolley into the work station. At this time, the guide wheels contact the two inner walls of the work station to reduce friction.

[0014] Preferably, the tray is provided with a limiting hole that mates with the workpiece.

[0015] In this technical solution, it should be noted that the limiting holes are set on the pallet, and their main function is to position and fix the workpiece, restrict the horizontal movement and rotation of the workpiece on the pallet, and ensure that the position of the workpiece on the pallet is stable.

[0016] In summary, due to the adoption of the above technical solution, the beneficial effects of this utility model are: 1. In this utility model, batch carrying and flexible transfer of pallets can be realized. The wheels ensure that the trolley can move in different scenarios, the positioning pins prevent the pallets from shifting horizontally, and the support pins and slots allow multiple pallets to be stacked safely, thereby increasing the number of pallets that can be transferred in a single transaction.

[0017] 2. In this utility model, the top pallet is positioned by a pin to effectively prevent the pallet from shifting; after reaching the work station, the constraint can be released simply by lifting and rotating the movable plate. The operation steps are simple and convenient, which not only meets the stability requirements during transportation, but also improves the efficiency of pallet picking and placing at the work station, and is suitable for various pallet transfer scenarios. Attached Figure Description

[0018] This utility model will be described by way of example and with reference to the accompanying drawings, wherein: Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a schematic diagram of the three-dimensional structure of the base frame of this utility model; Figure 3 This is a three-dimensional structural diagram of the crossbar of this utility model; Figure 4 for Figure 2 Enlarged view of point A in the middle; Figure 5 This is a three-dimensional structural diagram of the tray of this utility model; Figure 6 This is a side view of the tray structure of this utility model; Among them: 100-base frame, 200-crossbar, 201-positioning plate, 202-positioning pin, 203-guide wheel, 300-vertical rod, 301-movable plate, 302-pin, 303-vertical shaft, 304-spring, 305-knob, 400-tray, 401-positioning hole, 402-slot, 403-limiting hole, 404-support pin, 405-plug-in part, 500-workpiece, 600-handrail. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can typically be arranged and designed in various different configurations.

[0020] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0021] It should be noted that, where there is no conflict, the embodiments and features in the embodiments of this utility model can be combined with each other.

[0022] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0023] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0024] It should be noted that, where there is no conflict, the embodiments and features in the embodiments of this utility model can be combined with each other.

[0025] Example

[0026] like Figures 1-6 As shown in the figure, this utility model discloses a pallet transfer trolley, including a base frame 100. The bottom of the base frame 100 is provided with wheels. The top of the base frame 100 is provided with two crossbars 200 for placing pallets 400. Each crossbar 200 is provided with two positioning plates 201 at intervals. The top of each positioning plate 201 is provided with a positioning pin 202 that mates with a positioning hole 401 on the pallet 400. The positioning pin 202 is vertically arranged. The bottom of the pallet 400 is provided with a support pin 404, and the top of the pallet 400 is provided with a slot 402 into which the support pin 404 can be inserted. It should be noted that the base frame 100 is the basic load-bearing component of the entire trolley, used to support the crossbars 200, the tray 400, and the items on the tray 400; the wheels are installed at the bottom of the base frame 100 to provide mobility for the trolley and facilitate overall transfer; the two spaced crossbars 200 are the direct support components for the tray 400, used to bear the weight of the tray 400 and ensure the stability of the tray 400 when placed; the two positioning plates 201 on each crossbar 200 are the fixing carriers for the positioning pins 202, used to determine the installation position of the positioning pins 202; the positioning pins 202 are vertically set on the top of the positioning plates 201 and can cooperate with the positioning holes 401 on the tray 400 to restrict the horizontal movement of the tray 400 on the crossbars 200; the support pins 404 at the bottom of the tray 400 are the positioning components when the trays 400 are stacked, and the slots 402 at the top of the tray 400 are the receiving components that cooperate with the support pins 404, used to accommodate the support pins 404 of the upper tray 400. Overall Principle: The base frame 100 bears all components and loads through its own structural strength. Two spaced crossbars 200 form a stable support surface. When a pallet 400 is placed on a crossbar 200, the positioning pin 202 of the positioning plate 201 inserts into the positioning hole 401 of the pallet 400, fixing the pallet 400 horizontally to the crossbar 200 and preventing it from sliding. When multiple pallets 400 need to be stacked, the support pin 404 at the bottom of the upper pallet 400 aligns with and inserts into the slot 402 at the top of the lower pallet 400, allowing the upper and lower pallets 400 to be positioned through the cooperation of the support pin 404 and the slot 402, forming a stable stacking structure. Overall Effect: This structure enables batch carrying and flexible transfer of pallets 400. The wheels ensure that the trolley can move in different scenarios, the positioning pin 202 prevents the pallet 400 from shifting horizontally, and the support pin 404 and slot 402 allow multiple pallets 400 to be stacked safely, increasing the number of pallets 400 that can be transferred in a single operation.

[0027] like Figure 2 and Figure 4As shown, in this embodiment, a vertical rod 300 is provided on one side of the base frame 100. The top of the vertical rod 300 is higher than the top of the base frame 100. A vertical shaft 303 is provided at the top of the vertical rod 300. A movable plate 301 is sleeved on the vertical shaft 303. A pin 302 is provided at the bottom of the movable plate 301 to cooperate with the positioning hole 401 on the tray 400. The vertical shaft 303 is threadedly connected to the vertical rod 300. A knob 305 is provided at the top of the vertical shaft 303. The diameter of the knob 305 is larger than the diameter of the vertical shaft 303. A spring 304 is also sleeved on the vertical shaft 303. One end of the spring 304 contacts the knob 305, and the other end contacts the movable plate 301. It should be noted that the vertical rod 300 is fixed to one side of the base frame 100, with its top higher than the top of the base frame 100. This provides a vertical mounting base for the vertical shaft 303 and the movable plate 301, ensuring that the movable plate 301 and the bottom pin 302 can cover the height of the topmost tray 400, thus meeting the positioning requirements of the top tray 400. The vertical shaft 303 serves as a mounting reference for the movable plate 301, allowing the movable plate 301 to move up and down along it and rotate around it. Furthermore, it is threadedly connected to the vertical rod 300 for easy disassembly. The movable plate 301 is the direct mounting carrier for the pin 302 and can move along with the vertical shaft 303. The height of the vertical axis 303 changes with its height, and it can also rotate independently around the vertical axis 303. Its core function is to drive the pin 302 to align, insert, or offset with the positioning hole 401 of the top tray 400. The pin 302 is used to position the top tray 400. During transportation, it needs to be inserted into the positioning hole 401 of the top tray 400 to limit the movement or horizontal deviation of the tray 400. The knob 305 increases the contact area for hand operation, making it easier for the operator to rotate the vertical axis 303. The spring 304 provides elastic pressure and generates a continuous downward thrust on the movable plate 301 to ensure that the pin 302 is inserted into the positioning hole 401. Overall principle: In front of the transport pallet 400, the operator lifts the movable plate 301 upwards and rotates it until the pin 302 at the bottom of the movable plate 301 aligns with the positioning hole 401 of the top pallet 400. Then, the movable plate 301 is released. At this time, the elastic pressure of the spring 304 will press the movable plate 301 downwards, allowing the pin 302 to insert into the positioning hole 401, thus constraining the top pallet 400 and preventing it from shifting during transportation. When the trolley arrives at the workstation... When it is necessary to remove the tray 400, the operator lifts the movable plate 301 upwards. The movable plate 301 compresses the spring 304 and moves upwards along the vertical axis 303, causing the pin 302 to disengage from the positioning hole 401 of the top tray 400. After releasing the positioning constraint, the movable plate 301 is rotated around the vertical axis 303 to rotate the pin 302 to a position that is offset from the tray 400, so as to avoid the pin 302 from obstructing the removal and placement of the tray 400. At this time, the tray 400 can be safely removed from the trolley.Overall effect: The structure uses pin 302 to position the top pallet 400, effectively preventing the pallet 400 from shifting. After reaching the work station, the constraint can be released simply by lifting and rotating the movable plate 301. The operation steps are simple and convenient, which not only meets the stability requirements during transportation, but also improves the efficiency of picking up and placing pallets 400 at the work station, and is suitable for various pallet 400 transfer scenarios.

[0028] like Figure 2 As shown, in this embodiment, a handrail 600 is provided on one side of the vertical rod 300. It should be noted that the handrail 600 is fixed to one side of the vertical rod 300 and is a force-applying component for the operator to control the cart, providing the operator with a stable grip point; at the same time, the handrail 600 also facilitates the operator to control the direction and speed of the cart's movement, preventing the cart from going out of control.

[0029] like Figure 6 As shown, in this embodiment, the slot 402 is a V-shaped groove, and the bottom of the positioning pin 202 is provided with an insertion part 405. The insertion part 405 is spherical, and the diameter of the slot opening of the slot 402 is larger than the diameter of the insertion part 405. It should be noted that the V-shaped groove opening of the slot 402 is slightly larger than the diameter of the spherical bottom of the positioning pin 202, so that it can be aligned with the tray as long as it is roughly aligned. The V-shaped groove guides the upper positioning pin 202 into place.

[0030] like Figure 3 As shown, in this embodiment, a guide wheel 203 is rotatably connected to the bottom of the crossbar 200, and the diameter of the guide wheel 203 is larger than the width of the crossbar 200. It should be noted that when this device reaches the workstation, the worker pushes the trolley into the workstation, at which point the guide wheel 203 contacts the two inner walls of the workstation, reducing friction.

[0031] like Figure 5 As shown, in this embodiment, the tray 400 is provided with a limiting hole 403 that mates with the workpiece 500. It should be noted that the limiting hole 403 is provided on the tray 400, and its main function is to position and fix the workpiece 500, restrict the horizontal movement and rotation of the workpiece 500 on the tray 400, and ensure that the position of the workpiece 500 on the tray 400 is stable.

[0032] The working principle of this utility model is as follows: When using the pallet 400 transfer trolley, first place the first pallet 400 on the two crossbars 200 at the top of the base frame 100. The positioning pins 202 of the positioning plate 201 on the crossbar 200 are inserted into the positioning holes 401 of the pallet 400 to restrict the horizontal movement of the pallet 400. When stacking multiple pallets 400, the support pins 404 at the bottom of the upper pallet 400 are inserted into the slots 402 at the top of the lower pallet 400 to ensure stable stacking. Before transporting the pallet 400, the operator lifts the movable plate 301 upwards and rotates it until the pin 302 at the bottom of the movable plate 301 aligns with the positioning hole 401 of the top pallet 400. Then, the operator releases the movable plate 301. At this time, the elastic pressure of the spring 304 will press the movable plate 301 downwards, allowing the pin 302 to insert into the positioning hole 401, thus constraining the top pallet 400 and preventing it from shifting during transport. When the trolley arrives at the workstation and the pallet 400 needs to be removed, the operator lifts the movable plate 301 upwards. The movable plate 301 compresses the spring 304 and moves upwards along the vertical axis 303, causing the pin 302 to disengage from the positioning hole 401 of the top pallet 400. After releasing the positioning constraint, the operator rotates the movable plate 301 around the vertical axis 303 to rotate the pin 302 to a position offset from the pallet 400, preventing the pin 302 from obstructing the pallet 400's removal and placement. At this point, the pallet 400 can be safely removed from the trolley.

[0033] The circuits, electronic components, and modules involved are all existing technologies, which can be fully implemented by those skilled in the art, and need not be elaborated upon. The content protected by this utility model does not involve any improvement to the software and methods.

[0034] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0035] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A pallet transfer trolley, characterized in that, Includes a base frame (100), the bottom of which is provided with wheels, and the top of the base frame (100) is provided with two crossbars (200) spaced apart for placing a tray (400). Each crossbar (200) is provided with two positioning plates (201) spaced apart, and the top of each positioning plate (201) is provided with a positioning pin (202) that mates with a positioning hole (401) on the tray (400). The positioning pin (202) is vertically arranged. The bottom of the tray (400) is provided with a support pin (404), and the top of the tray (400) is provided with a slot (402) into which the support pin (404) can be inserted.

2. The pallet transfer trolley according to claim 1, characterized in that, A vertical rod (300) is provided on one side of the base frame (100). The top of the vertical rod (300) is higher than the top of the base frame (100). A vertical shaft (303) is provided at the top of the vertical rod (300). A movable plate (301) is sleeved on the vertical shaft (303). A pin (302) is provided at the bottom of the movable plate (301) to cooperate with the positioning hole (401) on the tray (400).

3. A pallet transfer trolley according to claim 2, characterized in that, The vertical shaft (303) is threadedly connected to the vertical rod (300), and a knob (305) is provided at the top of the vertical shaft (303). The diameter of the knob (305) is larger than the diameter of the vertical shaft (303).

4. A pallet transfer trolley according to claim 3, characterized in that, A spring (304) is also fitted on the vertical shaft (303). One end of the spring (304) is in contact with the knob (305), and the other end is in contact with the movable plate (301).

5. A pallet transfer trolley according to claim 2, characterized in that, A handrail (600) is provided on one side of the vertical rod (300).

6. A pallet transfer trolley according to claim 1, characterized in that, The slot (402) is a V-shaped groove, and the bottom of the positioning pin (202) is provided with a plug (405). The plug (405) is spherical, and the diameter of the slot opening of the slot (402) is larger than the diameter of the plug (405).

7. A pallet transfer trolley according to claim 1, characterized in that, The bottom of the crossbar (200) is rotatably connected to a guide wheel (203), the diameter of which is greater than the width of the crossbar (200).

8. A pallet transfer trolley according to claim 1, characterized in that, The tray (400) is provided with a limiting hole (403) that mates with the workpiece (500).

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