Obstacle-avoiding transportation AGV (Automatic Guided Vehicle)

Abstract

The invention relates to an obstacle avoidance transportation AGV trolley, and relates to the field of material transportation. Comprising a vehicle body, a lifting platform, two transverse extension plates and two longitudinal extension plates, wherein the lifting platform is arranged above the vehicle body and can ascend and descend; the two transverse extension plates are symmetrically connected into the lifting platform in a sliding mode; the two longitudinal extension plates are symmetrically connected into the lifting platform in a sliding mode and are perpendicular to the sliding direction of the transverse extension plates; the two transverse extension plates and the two longitudinal extension plates can move towards the side close to or away from the lifting platform. When the transverse extension plate and the longitudinal extension plate move to the edge of the lifting platform, the transverse extension plate and the longitudinal extension plate can be turned over upwards to form a containing cavity. The application has the effect of improving the applicability of the AGV.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of material transportation, in particular to an obstacle-avoiding transportation AGV trolley. BACKGROUND

[0002] In the field of modern industrial logistics transportation, the development of automated transportation equipment plays a crucial role in improving production efficiency and reducing labor costs. AGV (Automated Guided Vehicle) trolley, as an important member of automated transportation equipment, is widely used in various production workshops, warehouses and other scenarios due to its high degree of automation and strong flexibility. It can automatically travel according to the preset path, realize efficient transportation of goods, greatly improve the efficiency and accuracy of logistics transportation, and promote the development of industrial production towards intelligence and automation.

[0003] In the past design of AGV trolley, in order to realize the transportation of goods, a lifting platform with fixed size is usually adopted. When facing different sizes of objects, the main way to solve the problem is to replace the appropriate AGV trolley or use multiple AGV trolleys for collaborative transportation. For larger objects, AGV trolleys with larger carrying capacity and platform size are selected; while for smaller objects, small AGV trolleys are used for transportation. In addition, a simple support structure is also added to the lifting platform to try to better fix the objects, but this support structure is usually fixed and cannot be flexibly adjusted according to the size of the object. When transporting larger objects, the fixed size of the lifting platform is difficult to effectively support the larger objects, and the larger objects are prone to large shaking due to bumps or vibrations, resulting in unstable placement of the objects or even falling. When transporting smaller objects, the fixed size of the lifting platform can only place a small amount of smaller objects, and the transportation efficiency is low. SUMMARY

[0004] In order to improve the applicability of AGV trolley, the present application provides an obstacle-avoiding transportation AGV trolley.

[0005] The obstacle-avoiding transportation AGV trolley provided by the present application adopts the following technical solution: An obstacle-avoiding transportation AGV trolley, comprising a vehicle body, a lifting platform arranged above the vehicle body, two symmetrical sliding connection of the lifting platform in the horizontal extension plate, two symmetrical sliding connection of the lifting platform in the vertical extension plate and the sliding direction of the horizontal extension plate is perpendicular, two horizontal extension plates and two vertical extension plates can move to the side close to or away from the lifting platform; When the horizontal extension plate and the vertical extension plate move to the edge of the lifting platform, the horizontal extension plate and the vertical extension plate can be turned up to form a containing chamber.

[0006] By adopting the above technical scheme, the transverse extension plates and the longitudinal extension plates can move towards or away from one side of the lifting platform, and can be flipped upwards to form accommodating cavities when moving to the edge of the lifting platform. When transporting large objects, the transverse extension plates and the longitudinal extension plates are moved to the outside of the lifting platform, so that the transverse support seats and the longitudinal support seats are unfolded to stably support the large objects, avoid the large objects from shaking or vibrating to generate large shaking, ensure the stability of the large objects, and prevent the large objects from falling off. When transporting small objects, the transverse extension plates and the longitudinal extension plates are flipped upwards to form the accommodating cavities, more small objects can be placed in the accommodating cavities, the small objects are conveniently transported in batches, and the transportation efficiency is improved.

[0007] Optionally, two symmetrical transverse extension grooves are formed in the lifting platform, the transverse extension plates are slidingly connected in the transverse extension grooves, a transverse synchronous gear is rotationally connected in the lifting platform, two transverse moving racks are slidingly connected in the lifting platform and simultaneously mesh with the transverse synchronous gear, the side of the two transverse extension plates close to each other is fixed with a transverse flipping shaft, a transverse flipping gear is fixedly sleeved on the transverse flipping shaft, and the transverse flipping gear meshes with the transverse moving rack. Two symmetrical longitudinal extension grooves are formed in the lifting platform, the longitudinal extension plates are slidingly connected in the longitudinal extension grooves, a longitudinal synchronous gear is rotationally connected in the lifting platform, two longitudinal moving racks are slidingly connected in the lifting platform and simultaneously mesh with the longitudinal synchronous gear, the side of the two longitudinal extension plates close to each other is fixed with a longitudinal flipping shaft, a longitudinal flipping gear is fixedly sleeved on the longitudinal flipping shaft, and the longitudinal flipping gear meshes with the longitudinal moving rack.

[0008] By adopting the above technical scheme, when the positions of the transverse extension plates and the longitudinal extension plates need to be adjusted, one of the transverse extension plates is pulled, the transverse synchronous gear is rotated to drive the two transverse moving racks meshing therewith to synchronously and reversely move, the transverse moving racks move to drive the transverse flipping gears meshing therewith to move, and then the transverse extension plates on the two sides slide in the transverse extension grooves. The longitudinal extension plates are the same. The transverse synchronous gear and the transverse moving rack cooperate to synchronously and reversely move the two transverse extension plates, the longitudinal synchronous gear and the longitudinal moving rack cooperate to synchronously and reversely move the two longitudinal extension plates, the transverse extension plates and the longitudinal extension plates move towards or away from one side of the lifting platform, the transverse flipping gear meshes with the transverse moving rack and the longitudinal flipping gear meshes with the longitudinal moving rack, and the transverse extension plates and the longitudinal extension plates are flipped upwards to form the accommodating cavities when moving to the edge of the lifting platform.

[0009] Optionally, the two ends of the lateral tilting shaft are fitted with lateral limiting rings, which are fixedly connected to the lifting platform and communicate with the lateral extension groove; the two ends of the longitudinal tilting shaft are fitted with longitudinal limiting rings, which are fixedly connected to the lifting platform and communicate with the longitudinal extension groove.

[0010] By adopting the above technical solution, when the lateral extension plate slides to the edge of the lifting platform in the lateral extension groove, the lateral flipping shaft can rotate stably upward under the restriction of the lateral limit ring. When the longitudinal extension plate slides to the edge of the lifting platform in the longitudinal extension groove, the longitudinal flipping shaft can rotate stably upward under the restriction of the longitudinal limit ring. At the same time, it makes it less likely for the lateral and longitudinal extension plates to shake or deviate during the flipping process, so that the lateral and longitudinal extension plates can be accurately flipped upward to form a receiving chamber, thereby improving the reliability and stability of the AGV.

[0011] Optionally, a transverse support is fixed to one side of the two transverse extension plates that are far apart from each other, and a longitudinal support is fixed to one side of the two longitudinal extension plates that are far apart from each other. The upper surfaces of the transverse support and the upper surfaces of the longitudinal support are flush with the upper surface of the lifting platform.

[0012] By adopting the above technical solution, when it is necessary to transport larger objects, the horizontal extension plate and the vertical extension plate move to the outside of the lifting platform, so that the horizontal support seat and the vertical support seat move to the appropriate position. Since the upper surface of the horizontal support seat and the upper surface of the vertical support seat are flush with the upper surface of the lifting platform, when placing larger objects, the lifting platform, the horizontal support seat and the vertical support seat can jointly form a flat and continuous support surface for the larger objects.

[0013] Optionally, the bottom of the transverse extension plate is provided with a transverse reinforcing rib, and the bottom of the longitudinal extension plate is provided with a longitudinal reinforcing rib; when the transverse extension plate moves to the edge of the lifting platform, the transverse reinforcing rib abuts against the bottom of the lifting platform to restrict the transverse extension plate from flipping downward; when the longitudinal extension plate moves to the edge of the lifting platform, the longitudinal reinforcing rib abuts against the bottom of the lifting platform to restrict the longitudinal extension plate from flipping downward.

[0014] By adopting the above technical solution, when the transverse extension plate and the longitudinal extension plate move towards the edge of the lifting platform, the transverse reinforcing ribs at the bottom of the transverse extension plate and the longitudinal reinforcing ribs at the bottom of the longitudinal extension plate will move accordingly. After the transverse extension plate and the longitudinal extension plate move to the edge of the lifting platform, the transverse reinforcing ribs and the longitudinal reinforcing ribs abut against the bottom of the lifting platform, restricting the transverse extension plate and the longitudinal extension plate from flipping downwards, thus providing support for the transverse extension plate and the longitudinal extension plate. Therefore, when transporting larger objects, the transverse extension plate and the longitudinal extension plate can stably provide support for the larger objects, ensuring the stability of the objects during transportation.

[0015] Optionally, a sealing strip is fixed to the side of the longitudinal extension plate near the transverse extension plate. When the transverse extension plate and the longitudinal extension plate are flipped upward to form a receiving chamber, the sealing strip contacts the transverse extension plate to seal the gap between them.

[0016] By adopting the above technical solution, when the transverse extension plate and the longitudinal extension plate are flipped upward to form a receiving chamber, the sealing strip fixed on the longitudinal extension plate will come into contact with the transverse extension plate, which will seal the gap between the two, making it difficult for smaller materials to fall out from the gap between the transverse extension plate and the longitudinal extension plate.

[0017] Optionally, the transverse extension plate is provided with a locking ring, and the longitudinal extension plate is provided with a spring pin; when the transverse extension plate and the longitudinal extension plate are flipped upward to form a receiving chamber, the pin of the spring pin can be inserted into the locking ring.

[0018] By adopting the above technical solution, when the transverse extension plate and the longitudinal extension plate are flipped upward to form a receiving chamber, the pin of the spring pin on the longitudinal extension plate will be inserted into the locking ring on the transverse extension plate, so that the transverse extension plate and the longitudinal extension plate can lock each other after forming the receiving chamber, preventing relative shaking or displacement between the two during transportation, and enhancing the structural stability of the receiving chamber.

[0019] Optionally, the lifting platform is provided with multi-stage hydraulic cylinders at the four corners below, and the two ends of the multi-stage hydraulic cylinders are respectively hinged to the lifting platform and the vehicle body. The longitudinal extension plate is provided with an openable and closable discharge port.

[0020] By adopting the above technical solution, the two ends of the multi-stage hydraulic cylinder are respectively hinged to the lifting platform and the vehicle body. When it is necessary to unload materials, the multi-stage hydraulic cylinder is activated, which drives the lifting platform to move upward. At the same time, it causes the unloading port of the longitudinal extension plate to tilt downward, and then opens the openable and closable unloading port on the longitudinal extension plate. When transporting smaller objects to the destination, the action of the multi-stage hydraulic cylinder and the opening of the unloading port can automatically unload the smaller objects without manual operation, thus improving unloading efficiency.

[0021] Optionally, an upper support door plate is fixed on the discharge port, and a lower opening and closing door plate is slidably connected inside the upper support door plate. An opening and closing screw is rotatably connected between the upper support door plate and the longitudinal extension plate. One end of the opening and closing screw is equipped with a drive motor, and the opening and closing screw is threadedly connected to the lower opening and closing door plate.

[0022] By adopting the above technical solution, the drive motor drives the opening and closing screw to rotate. Since the opening and closing screw is threadedly connected to the lower opening and closing door plate, the lower opening and closing door plate will slide inside the upper support door plate, thereby realizing the opening or closing of the feeding port.

[0023] In summary, this application includes at least one of the following beneficial technical effects: 1. When transporting larger objects, the horizontal and vertical extension plates are moved outwards from the lifting platform, allowing the horizontal and vertical support seats to unfold and provide stable support for the larger objects. This prevents the larger objects from swaying excessively due to bumps or vibrations, ensuring the stability of the larger objects and preventing them from falling off. When transporting smaller objects, the horizontal and vertical extension plates are flipped upwards to form a receiving chamber, which can hold more smaller objects, facilitating centralized transportation of smaller objects and improving transportation efficiency. The AGV can simultaneously handle both larger and smaller objects, enhancing its versatility. 2. When the lateral extension plate slides to the edge of the lifting platform within the lateral extension groove, the lateral tilting shaft can rotate stably upward under the constraint of the lateral limit ring. When the longitudinal extension plate slides to the edge of the lifting platform within the longitudinal extension groove, the longitudinal tilting shaft can rotate stably upward under the constraint of the longitudinal limit ring. This ensures that the lateral and longitudinal extension plates are less prone to shaking or shifting during the tilting process, allowing them to precisely tilt upward to form a receiving chamber, thus improving the reliability and stability of the AGV vehicle. 3. When placing larger objects, the lifting platform, horizontal support base, and vertical support base can work together to form a flat and continuous support surface for the larger objects; 4. When the horizontal and vertical extension plates move to the edge of the lifting platform, the horizontal and vertical reinforcing ribs abut against the bottom of the lifting platform, restricting the horizontal and vertical extension plates from flipping downwards and providing support for them. Thus, when transporting larger objects, the horizontal and vertical extension plates can stably support the larger objects and ensure the stability of the objects during transportation. 5. When the transverse extension plate and the longitudinal extension plate are flipped upward to form a receiving chamber, the pin of the spring pin on the longitudinal extension plate will be inserted into the locking ring on the transverse extension plate, so that the transverse extension plate and the longitudinal extension plate can lock each other after forming the receiving chamber, preventing relative shaking or displacement of the two during transportation and enhancing the structural stability of the receiving chamber. 6. When transporting smaller items to their destination, the action of multi-stage hydraulic cylinders and the opening of the discharge port allow for automatic unloading of smaller items, eliminating the need for manual operation and improving unloading efficiency. Attached Figure Description

[0024] Figure 1 This is a structural schematic diagram of the obstacle avoidance transport AGV in this application; Figure 2 This is a structural diagram showing the horizontal and vertical extension plates moving to the outside of the lifting platform; Figure 3 This is a schematic diagram showing the structure when the transverse extension plate and the longitudinal extension plate are flipped upwards to form a receiving chamber; Figure 4 It means Figure 2 A partially enlarged structural diagram of part A in the middle; Figure 5 This is a partial sectional view showing the internal structure of the lifting platform; Figure 6 It means Figure 5 A partially enlarged structural diagram of section B; Figure 7 This is a cross-sectional view showing the upper support door panel and the lower opening and closing door panel; Figure 8 This is a structural diagram showing the installation positions of a multi-stage hydraulic cylinder.

[0025] Explanation of reference numerals in the attached drawings: 1. Vehicle body; 2. Lifting platform; 21. Lateral extension groove; 22. Longitudinal extension groove; 3. Lateral extension plate; 31. Lateral synchronous gear; 32. Lateral moving rack; 33. Lateral tilting shaft; 34. Lateral tilting gear; 35. Lateral limiting ring; 36. Lateral support seat; 37. Lateral reinforcing rib; 38. Locking ring; 4. Longitudinal extension plate; 41. Longitudinal synchronous gear; 42. Longitudinal moving rack; 43. Longitudinal tilting shaft; 44. Longitudinal tilting gear; 45. Longitudinal limiting ring; 46. Longitudinal support seat; 47. Longitudinal reinforcing rib; 48. Sealing strip; 49. Locking pin; 5. Receiving chamber; 6. Multi-stage hydraulic cylinder; 7. Upper support door panel; 71. Lower opening and closing door panel; 73. Opening and closing screw; 74. Drive motor. Detailed Implementation

[0026] The following is in conjunction with the appendix Figures 1-8 This application will be described in further detail.

[0027] This application discloses an obstacle-avoiding AGV (Automated Guided Vehicle) for transportation. (Refer to...) Figure 1 and Figure 2The obstacle avoidance AGV includes a vehicle body 1, a lifting platform 2, two transverse extension plates 3, and two longitudinal extension plates 4. The lifting platform 2 is located above the vehicle body 1 and can be raised and lowered. The two transverse extension plates 3 are symmetrically slidably connected to the lifting platform 2, and the two longitudinal extension plates 4 are also symmetrically slidably connected to the lifting platform 2 and perpendicular to the sliding direction of the transverse extension plates 3. The two transverse extension plates 3 and the two longitudinal extension plates 4 can move towards or away from the lifting platform 2. When the transverse extension plates 3 and the longitudinal extension plates 4 move to the edge of the lifting platform 2, they can be flipped upward to form a receiving chamber 5.

[0028] When transporting larger objects, the transverse extension plate 3 and the longitudinal extension plate 4 are moved outwards from the lifting platform 2, causing the transverse support seat 36 and the longitudinal support seat 46 to unfold, providing stable support for the larger objects and preventing them from swaying due to bumps or vibrations. This ensures the stability of the larger objects and prevents them from falling. When transporting smaller objects, the transverse extension plate 3 and the longitudinal extension plate 4 are flipped upwards to form a receiving chamber 5. This chamber 5 can hold more smaller objects, facilitating centralized transport and improving transport efficiency. This allows the AGV to flexibly adjust its carrying area according to the size of the transported objects and also creates a receiving chamber 5 to prevent objects from falling during transport, greatly improving the stability and efficiency of transport.

[0029] Specifically, refer to Figures 3-5 The lifting platform 2 has two symmetrically arranged transverse extension slots 21, and the transverse extension plates 3 are slidably connected within the transverse extension slots 21. A transverse synchronous gear 31 is rotatably connected within the lifting platform 2, and two transverse moving racks 32 are slidably connected within the lifting platform 2, simultaneously meshing with the transverse synchronous gear 31. The two transverse moving racks 32 move synchronously in opposite directions. A transverse tilting shaft 33 is fixed to one side of the two transverse extension plates 3 that are close to each other. A transverse tilting gear 34 is fixedly sleeved on the transverse tilting shaft 33, and the transverse tilting gear 34 meshes with the transverse moving racks 32.

[0030] Reference Figures 3-5 The lifting platform 2 has two symmetrically arranged longitudinal extension slots 22, and the longitudinal extension plates 4 are slidably connected within the longitudinal extension slots 22. A longitudinal synchronous gear 41 is rotatably connected within the lifting platform 2, and two longitudinal moving racks 42 are slidably connected within the lifting platform 2, simultaneously meshing with the longitudinal synchronous gear 41. The two longitudinal moving racks 42 move synchronously in opposite directions. A longitudinal tilting shaft 43 is fixed to one side of the two longitudinal extension plates 4 that are close to each other. A longitudinal tilting gear 44 is fixedly sleeved on the longitudinal tilting shaft 43, and the longitudinal tilting gear 44 meshes with the longitudinal moving racks 42.

[0031] Reference Figures 4-6Both the transverse tilting shaft 33 and the longitudinal tilting shaft 43 are made of high-strength metal to ensure they will not be damaged during frequent tilting. The meshing of the transverse tilting gear 34 and the transverse moving rack 32 precisely controls the tilting motion of the transverse extension plate 3. Transverse limiting rings 35 are fitted at both ends of the transverse tilting shaft 33, and are fixedly connected to the lifting platform 2, and communicate with the transverse extension groove 21. Similarly, longitudinal limiting rings 45 are fitted at both ends of the longitudinal tilting shaft 43, and are fixedly connected to the lifting platform 2, and communicate with the longitudinal extension groove 22. The transverse and longitudinal limiting rings 35 are used to limit the positions of the transverse and longitudinal tilting shafts 33 and 43, respectively.

[0032] When the positions of the transverse extension plate 3 and the longitudinal extension plate 4 need to be adjusted, one of the transverse extension plates 3 is pulled. The transverse synchronous gear 31 rotates, causing the two transverse moving racks 32 meshing with it to move synchronously in opposite directions. The movement of the transverse moving racks 32 causes the transverse flipping gear 34 meshing with it to move, thereby causing the transverse extension plates 3 on both sides to slide within the transverse extension groove 21; the same applies to the longitudinal extension plate 4. When the transverse extension plate 3 slides within the transverse extension groove 21 to the edge of the lifting platform 2, the transverse flipping shaft 33 can rotate stably upward under the restriction of the transverse limiting ring 35. When the longitudinal extension plate 4 slides within the longitudinal extension groove 22 to the edge of the lifting platform 2, the longitudinal flipping shaft 43 can rotate stably upward under the restriction of the longitudinal limiting ring 45. This allows the transverse extension plates 3 and the longitudinal extension plate 4 to precisely flip upward to form the receiving chamber 5.

[0033] Reference Figure 2 Two transverse extension plates 3 are fixed to opposite sides with transverse support seats 36, and two longitudinal extension plates 4 are fixed to opposite sides with longitudinal support seats 46. The upper surfaces of both the transverse support seats 36 and the longitudinal support seats 46 are flush with the upper surface of the lifting platform 2. When transporting larger objects, the transverse extension plates 3 and 4 extend outwards from the lifting platform 2. The transverse support seats 36 and 46, together with the lifting platform 2, provide effective support for the larger objects, making them less prone to excessive swaying due to bumps or vibrations, thus improving the stability of transportation. Both the transverse support seats 36 and the longitudinal support seats 46 are made of solid metal blocks to ensure their support strength.

[0034] Reference Figure 1 and Figure 2The bottom of the transverse extension plate 3 is provided with a transverse reinforcing rib 37, and the bottom of the longitudinal extension plate 4 is provided with a longitudinal reinforcing rib 47. When the transverse extension plate 3 moves to the edge of the lifting platform 2, the transverse reinforcing rib 37 abuts against the bottom of the lifting platform 2 to prevent the transverse extension plate 3 from flipping downward; when the longitudinal extension plate 4 moves to the edge of the lifting platform 2, the longitudinal reinforcing rib 47 abuts against the bottom of the lifting platform 2 to prevent the longitudinal extension plate 4 from flipping downward. The transverse reinforcing rib 37 and the longitudinal reinforcing rib 47 adopt a triangular structure, which has better stability and can enhance the strength of the transverse extension plate 3 and the longitudinal extension plate 4, ensuring that they will not deform excessively due to stress when bearing objects.

[0035] Reference Figure 1 and Figure 2 A sealing strip 48 is fixed to the side of the longitudinal extension plate 4 near the transverse extension plate 3. When the transverse extension plate 3 and the longitudinal extension plate 4 are flipped upward to form the receiving chamber 5, the sealing strip 48 contacts the transverse extension plate 3 to seal the gap between them. The sealing strip 48 can prevent small objects from falling out of the gap and ensure the safety of transporting small objects.

[0036] Reference Figure 1 The transverse extension plate 3 is equipped with a locking ring 38, and the longitudinal extension plate 4 is equipped with a spring pin. When the transverse extension plate 3 and the longitudinal extension plate 4 are flipped upward to form the receiving chamber 5, the pin of the spring pin can be inserted into the locking ring 38, thereby enabling the transverse extension plate 3 and the longitudinal extension plate 4 to lock each other after forming the receiving chamber 5, preventing relative shaking or displacement during transportation and enhancing the structural stability of the receiving chamber 5. The bottom of the spring pin is chamfered, which facilitates the insertion of the spring pin into the locking ring 38.

[0037] Reference Figure 7 and Figure 8 The lifting platform 2 has multi-stage hydraulic cylinders 6 installed at the four corners below each other. The two ends of each multi-stage hydraulic cylinder 6 are hinged to the lifting platform 2 and the vehicle body 1, respectively. A closable discharge port is provided on the longitudinal extension plate 4. The multi-stage hydraulic cylinders 6 can realize the lifting action of the lifting platform 2 and can adjust the lifting height as needed. When transporting smaller objects to their destination, the multi-stage hydraulic cylinders 6 can drive the lifting platform 2 upwards, simultaneously causing the discharge port side of the longitudinal extension plate 4 to tilt downwards, thereby opening the discharge port and automatically discharging the smaller objects, improving transportation efficiency. An upper support door plate 7 is fixed to the discharge port. A lower opening / closing door plate 71 is slidably connected inside the upper support door plate 7. An opening / closing screw 73 is rotatably connected between the upper support door plate 7 and the longitudinal extension plate 4. One end of the opening / closing screw 73 is equipped with a drive motor 74, and the opening / closing screw 73 is threadedly connected to the lower opening / closing door plate 71. The drive motor 74 drives the opening and closing screw 73 to rotate, and the lower opening and closing door plate 71 slides on the opening and closing screw 73 through the threaded connection, thereby realizing the opening and closing of the feeding port.

[0038] The implementation principle of the obstacle-avoiding AGV trolley in this application embodiment is as follows: The AGV trolley can flexibly adjust its carrying area according to the size of the transported object. When transporting larger objects, the transverse extension plate 3 and the longitudinal extension plate 4 extend outwards from the lifting platform 2. The transverse support seat 36 and the longitudinal support seat 46, together with the lifting platform 2, provide support for the larger object, improving the stability of the transport. When transporting smaller objects, the transverse extension plate 3 and the longitudinal extension plate 4 move to the edge of the lifting platform 2 and flip upwards to form a receiving chamber 5, preventing the small object from falling. At the same time, they are fixed by spring pins and locking rings 38, and the sealing strip 48 seals the gaps, further ensuring the safety of transporting small objects. The design of the discharge port facilitates the unloading of small objects. When the smaller object is transported to its destination, the action of the multi-stage hydraulic cylinder 6 and the opening of the discharge port allow the smaller object to be automatically unloaded without manual operation, improving the unloading efficiency. Compared with the traditional AGV trolley with a fixed-size lifting platform 2, this greatly improves the transport efficiency and applicability.

[0039] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. An obstacle-avoiding AGV (Automated Guided Vehicle), characterized in that, Includes a vehicle body (1), a lifting platform (2) that can be raised and lowered above the vehicle body (1), two symmetrically slidably connected transverse extension plates (3) within the lifting platform (2), and two symmetrically slidably connected longitudinal extension plates (4) within the lifting platform (2) perpendicular to the sliding direction of the transverse extension plates (3). Both the two transverse extension plates (3) and the two longitudinal extension plates (4) can move towards or away from the lifting platform (2). When the transverse extension plate (3) and the longitudinal extension plate (4) move to the edge of the lifting platform (2), the transverse extension plate (3) and the longitudinal extension plate (4) can be flipped upward to form a receiving chamber (5).

2. The obstacle-avoiding AGV trolley according to claim 1, characterized in that, The lifting platform (2) has two symmetrically arranged transverse extension slots (21). The transverse extension plate (3) is slidably connected in the transverse extension slots (21). The lifting platform (2) is rotatably connected with a transverse synchronous gear (31). The lifting platform (2) has two transverse moving racks (32) that mesh with the transverse synchronous gear (31) simultaneously. The two transverse moving racks (32) move synchronously in opposite directions. A transverse flipping shaft (33) is fixed on one side of the two transverse extension plates (3) that are close to each other. A transverse flipping gear (34) is fixedly sleeved on the transverse flipping shaft (33). The transverse flipping gear (34) meshes with the transverse moving rack (32). The lifting platform (2) has two symmetrically arranged longitudinal extension slots (22). The longitudinal extension plate (4) is slidably connected in the longitudinal extension slots (22). The lifting platform (2) is rotatably connected with a longitudinal synchronous gear (41). The lifting platform (2) has two longitudinal moving racks (42) that simultaneously mesh with the longitudinal synchronous gear (41). The two longitudinal moving racks (42) move synchronously in opposite directions. A longitudinal flipping shaft (43) is fixed on one side of the two longitudinal extension plates (4) that are close to each other. A longitudinal flipping gear (44) is fixedly sleeved on the longitudinal flipping shaft (43). The longitudinal flipping gear (44) meshes with the longitudinal moving rack (42).

3. The obstacle-avoiding AGV trolley according to claim 2, characterized in that, The two ends of the transverse flip shaft (33) are fitted with transverse limiting rings (35), which are fixedly connected to the lifting platform (2) and are connected to the transverse extension groove (21); the two ends of the longitudinal flip shaft (43) are fitted with longitudinal limiting rings (45), which are fixedly connected to the lifting platform (2) and are connected to the longitudinal extension groove (22).

4. The obstacle-avoiding AGV trolley according to claim 2, characterized in that, A transverse support seat (36) is fixed on one side of the two transverse extension plates (3) that are far apart from each other, and a longitudinal support seat (46) is fixed on one side of the two longitudinal extension plates (4) that are far apart from each other. The upper surfaces of the transverse support seat (36) and the upper surfaces of the longitudinal support seat (46) are flush with the upper surface of the lifting platform (2).

5. The obstacle-avoiding AGV trolley according to claim 2, characterized in that, The bottom of the transverse extension plate (3) is provided with a transverse reinforcing rib (37), and the bottom of the longitudinal extension plate (4) is provided with a longitudinal reinforcing rib (47). When the transverse extension plate (3) moves to the edge of the lifting platform (2), the transverse reinforcing rib (37) abuts against the bottom of the lifting platform (2) to restrict the transverse extension plate (3) from flipping downward. When the longitudinal extension plate (4) moves to the edge of the lifting platform (2), the longitudinal reinforcing rib (47) abuts against the bottom of the lifting platform (2) to restrict the longitudinal extension plate (4) from flipping downward.

6. The obstacle-avoiding AGV trolley according to claim 2, characterized in that, A sealing strip (48) is fixed on the side of the longitudinal extension plate (4) near the transverse extension plate (3). When the transverse extension plate (3) and the longitudinal extension plate (4) are flipped upward to form a receiving chamber (5), the sealing strip (48) contacts the transverse extension plate (3) to seal the gap between them.

7. The obstacle-avoiding AGV trolley according to claim 1, characterized in that, The transverse extension plate (3) is provided with a locking ring (38), and the longitudinal extension plate (4) is provided with a spring pin; when the transverse extension plate (3) and the longitudinal extension plate (4) are flipped upward to form a receiving chamber (5), the pin of the spring pin can be inserted into the locking ring (38).

8. The obstacle-avoiding AGV trolley according to claim 1, characterized in that, The lifting platform (2) is equipped with multi-stage hydraulic cylinders (6) at the four corners below. The two ends of the multi-stage hydraulic cylinders (6) are respectively hinged to the lifting platform (2) and the vehicle body (1). The longitudinal extension plate (4) is provided with an openable and closable discharge port.

9. The obstacle-avoiding AGV trolley according to claim 8, characterized in that, An upper support door plate (7) is fixed on the discharge port. A lower opening and closing door plate (71) is slidably connected inside the upper support door plate (7). An opening and closing screw (73) is rotatably connected between the upper support door plate (7) and the longitudinal extension plate (4). A drive motor (74) is provided at one end of the opening and closing screw (73). The opening and closing screw (73) is threadedly connected to the lower opening and closing door plate (71).

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