Automatic feeding and discharging RGV trolley of machine tool

Abstract

The utility model relates to the technical field of feeding and discharging RGVs, in particular to an automatic feeding and discharging RGV for a machine tool, and adopts the technical scheme that the automatic feeding and discharging RGV comprises a moving platform, a groove is formed in one side of the top surface of the moving platform, a stock bin can be inserted into the groove in the top surface of the moving platform, and two stock bins can be borne in the groove in the top surface of the moving platform; a plurality of layers of material trays are stacked in the material bins, and switching devices are fixedly installed on the two sides of an open groove in the top face of the movable platform. The material trays on the upper layer of the material bins are switched into the material bins on the adjacent sides through the switching devices on the top face of the movable platform. And then the trays on the lower layer of the adjacent stock bin are switched to the lower layer of the stock bin and pushed upwards, so that circulating switching of the trays between the two stock bins is achieved, the effect that the trays can be loaded in the two stock bins is achieved, the storage space of the feeding and discharging RGV trolley is increased, the effect of automatically and circularly switching the trays is achieved, and the working efficiency is improved. And the working efficiency of the loading and unloading RGV trolley is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of RGV trolleys for loading and unloading materials, in particular to an RGV trolley for automatic loading and unloading materials for machine tools. Background Art

[0002] The RGV trolley for automatic loading and unloading of machine tools is an automated rail-type transport vehicle, which is usually used to transfer raw materials, semi-finished products or finished products from one production line to another in the factory, and replenish them to machine tools and other production equipment in a timely manner. This type of trolley can move along the pre-set rails or guide rails, usually driven by an electric drive system, and equipped with various sensors and control systems to realize automated material transportation tasks. The RGV trolley reliably and efficiently realizes automatic loading and unloading of machine tools, improving the automation level and production efficiency of the production line. At the same time, its safety performance and precise navigation technology also bring more convenience and security to the logistics and transportation within the factory.

[0003] The prior art has the following deficiencies: the traditional automatic loading and unloading RGV trolley is usually composed of a mobile platform, a material warehouse and a loading robotic arm. There are multiple layers of material trays stacked in the material warehouse. The mobile platform drives the material warehouse to move to one side of the machine tool, and then the raw materials on the material tray are grabbed to the machine tool table by the loading robotic arm. Since the material trays in the material warehouse are in a stacked state, in order for the material robotic arm to grab the raw materials on the lower material tray, the traditional RGV trolley will install an empty material warehouse on one side of the material warehouse for placing empty material trays. Due to the limited area of ​​the RGV trolley's mobile platform, an additional empty material warehouse occupies the storage space of the loading and unloading RGV trolley, greatly reducing the carrying capacity of the loading and unloading RGV trolley. In addition, the traditional loading and unloading RGV trolley needs to be assisted by the loading robotic arm to move and switch when switching material trays, and cannot automatically switch material trays, which greatly affects the working efficiency of the loading and unloading RGV trolley.

[0004] Therefore, it is necessary to invent an RGV trolley for automatic loading and unloading of machine tools. Utility Model Content

[0005] To this end, the utility model provides an RGV trolley for automatic loading and unloading of machine tools. Through the switching device on the top surface of the mobile platform, the material tray on the upper layer of the silo is switched to the silo on the adjacent side, and then the material tray on the lower layer of the adjacent silo is switched to the lower layer of the silo and pushed upward, so that both silos can be loaded with material trays and the material trays can be cyclically switched between the two silos, so as to solve the problem that the traditional automatic loading and unloading RGV trolley needs to carry an additional empty silo, occupying the storage space of the loading and unloading RGV trolley and greatly reducing the carrying capacity of the loading and unloading RGV trolley, and the problem that the loading and unloading RGV trolley needs to be assisted by a loading mechanical arm for movement and switching, and the material tray cannot be automatically switched, which greatly affects the working efficiency of the loading and unloading RGV trolley.

[0006] In order to achieve the above-mentioned objectives, the utility model provides the following technical solutions: an RGV trolley for automatic loading and unloading of machine tools, comprising a mobile platform and a guide rail, the guide rail being installed on the ground and extending to one side of the machine tool, the mobile platform being slidably installed on the guide rail, a groove being provided on one side of the top surface of the mobile platform, one end of the groove on the top surface of the mobile platform extending to the side surface of the mobile platform, a material bin being insertable and installable in the groove on the top surface of the mobile platform, the groove on the top surface of the mobile platform being able to carry two material bins, multiple layers of material trays being stacked in the material bin, switching devices being fixedly installed on both sides of the groove on the top surface of the mobile platform, the switching device being able to switch the material tray on the upper layer of the material bin to the material bin on the adjacent side, and push the material tray on the lower layer of the material bin upward.

[0007] Preferably, the silo is a rectangular frame structure, a slide rail is fixedly installed in the center of the side where the two silos are away from each other, and side panels are fixedly installed at both ends of the outer wall of the material tray. The side panels on both sides of the material tray can be clamped on both sides of the slide rail and slide up and down along the slide rail.

[0008] Preferably, the silo is divided into seven layers from bottom to top, the maximum capacity of the silo can accommodate seven material trays, and six material trays are placed in each of the two silos installed on the top surface of the mobile platform.

[0009] Preferably, the switching device includes a side frame, which is arranged on both sides of the two silos on the top surface of the mobile platform. A number of No. 1 hydraulic rods are fixedly installed on both sides of the groove on the top surface of the mobile platform, and the end of the No. 1 hydraulic rod close to the silo is fixedly connected to the side frame.

[0010] Preferably, the side frame is fixedly installed with support plate No. 1, support plate No. 2 and support plate No. 3 from top to bottom on one side close to the silo, support plate No. 1 is arranged on the lower side of the seventh layer of the silo, support plate No. 2 is arranged on the lower side of the second layer of the silo, support plate No. 3 is arranged on the lower side of the first field of the silo, and support plate No. 1, support plate No. 2 and support plate No. 3 can be respectively inserted into the bottom surfaces of the material trays at the corresponding layers in the silo.

[0011] Preferably, the switching device includes transmission rollers, and the plurality of transmission rollers are rotatably installed on the top surface of the No. 1 support plate, and between the bottom surface of the No. 2 support plate and the top surface of the No. 3 support plate. The plurality of transmission rollers are grouped in pairs, and the outer walls of the transmission rollers in the same group are sleeved with a conveyor belt, and the transmission rollers in the same group are connected through the conveyor belt transmission. The bottom surface of the No. 1 support plate and the top surface of the No. 2 support plate are fixedly installed with a plurality of motors, and the plurality of motors correspond to a plurality of transmission rollers, and the output ends of the motors are close to the corresponding transmission rollers, respectively pass through the No. 1 support plate or the No. 2 support plate and are fixedly connected to the corresponding transmission rollers.

[0012] Preferably, the switching device includes a No. 2 hydraulic rod, which is embedded and installed in the bottom surface of the inner wall of the groove on the top surface of the mobile platform. The No. 2 hydraulic rod is arranged directly below the silo away from the groove opening on the top surface of the mobile platform, and a support plate is fixedly installed on the upper end of the No. 2 hydraulic rod.

[0013] Preferably, a chassis is fixedly installed on the top surface of the mobile platform, and the chassis is arranged on one side of the groove on the top surface of the mobile platform. A robotic arm is fixedly installed on the top surface of the chassis, and the robotic arm can grab the raw materials in the uppermost material tray of the silo and move it to the machine tool.

[0014] The beneficial effect of the utility model is that the material tray on the upper layer of the silo is switched to the silo on the adjacent side through the switching device on the top surface of the mobile platform, and then the material tray on the lower layer of the adjacent silo is switched to the lower layer of the silo and pushed upward, thereby realizing the cyclic switching of the material tray between the two silos, so as to achieve the effect of loading material trays in both silos, increasing the storage space of the loading and unloading RGV trolley, and achieving the effect of automatic cyclic switching of material trays, thereby improving the working efficiency of the loading and unloading RGV trolley. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a front view of an RGV trolley for automatic loading and unloading of machine tools provided by the utility model;

[0016] Figure 2 A front view of an RGV trolley for automatic loading and unloading of machine tools provided by the utility model;

[0017] Figure 3 A side view of an RGV trolley for automatic loading and unloading of machine tools provided by the utility model;

[0018] Figure 4 A schematic diagram of the structure of a switching device for an automatic loading and unloading RGV trolley of a machine tool provided by the utility model;

[0019] Figure 5 A sectional view of a material bin of an RGV trolley for automatic loading and unloading of a machine tool provided by the utility model.

[0020] In the figure: mobile platform 11, guide rail 12, silo 13, slide rail 14, chassis 15, robotic arm 16, material tray 17, side plate 18, side frame 21, No. 1 support plate 22, No. 2 support plate 23, No. 3 support plate 24, No. 1 hydraulic rod 25, drive roller 26, conveyor belt 27, motor 28, No. 2 hydraulic rod 29, support plate 30. DETAILED DESCRIPTION

[0021] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0022] Example 1

[0023] like Figure 1-Figure 3 As shown, an RGV trolley for automatic loading and unloading of machine tools in the embodiment of the first aspect of the utility model comprises a mobile platform 11 and a guide rail 12, wherein the guide rail 12 is installed on the ground and extends to one side of the machine tool, and the mobile platform 11 is slidably installed on the guide rail 12, and a groove is provided on one side of the top surface of the mobile platform 11, and one end of the groove on the top surface of the mobile platform 11 extends to the side of the mobile platform 11, and a material bin 13 can be inserted and installed in the groove on the top surface of the mobile platform 11, and the groove on the top surface of the mobile platform 11 can carry two material bins 13, and multiple layers of material trays 17 are stacked in the material bin 13, and switching devices are fixedly installed on both sides of the groove on the top surface of the mobile platform 11, and the switching device can switch the material tray 17 on the upper layer of the material bin 13 to the material bin 13 on the adjacent side, and push the material tray 17 on the lower layer of the material bin 13 upward.

[0024] In the above embodiment, it should be noted that the mobile platform 11 can slide along the guide rail 12 to one side of the machine tool, and the groove width on the top surface of the mobile platform 11 is equal to the width of the silo 13. Through the switching device on the top surface of the mobile platform 11, the material tray 17 on the upper layer of the silo 13 is switched to the silo 13 on the adjacent side, and then the material tray 17 on the lower layer of the adjacent silo 13 is switched to the lower layer of the silo 13 and pushed upward, thereby realizing the cyclic switching of the material tray 17 between the two silos 13, so as to achieve the effect of loading the material tray 17 in both silos 13, thereby increasing the storage space of the loading and unloading RGV trolley, and achieving the effect of automatic cyclic switching of the material tray 17, thereby improving the working efficiency of the loading and unloading RGV trolley.

[0025] Example 2

[0026] like Figure 1-Figure 3 and Figure 5 As shown, an RGV trolley for automatic loading and unloading of machine tools includes all the contents of Example 1. In addition, the silo 13 is a rectangular frame structure, and a slide rail 14 is fixedly installed in the center of one side of the two silos 13 away from each other, and side panels 18 are fixedly installed at both ends of the outer wall of the material tray 17. The side panels 18 on both sides of the material tray 17 can be clamped on both sides of the slide rail 14 and slide up and down along the slide rail. The silo 13 is divided into seven layers from bottom to top, and the maximum capacity of the silo 13 can accommodate seven material trays 17. Six material trays 17 are placed in each of the two silos 13 installed on the top surface of the mobile platform 11.

[0027] In the above embodiment, it should be noted that the silo 13 with a maximum capacity of seven trays 17 is only loaded with six trays 17, which has the effect of facilitating the cyclic switching of the trays 17 between the two silos 13. The slide rail 14 is used to assist the trays 17 to slide up and down. The slide rail 14 and the side plates 18 on both sides of the trays 17 are not stuck. The trays 17 can slide horizontally against one side of the slide rail 14 and drive the side plates 18 to both sides of the slide rail 14. The vertical height of the side plates 18 is greater than the vertical height of the trays 17 to ensure that there is a large gap between the stacked trays 17.

[0028] Example 3

[0029] like Figure 1-Figure 5 As shown, an RGV trolley for automatic loading and unloading of machine tools includes all the contents of Example 2. In addition, the switching device includes a side frame 21, and the side frame 21 is arranged on both sides of the two silos 13 on the top surface of the mobile platform 11. A number of No. 1 hydraulic rods 25 are fixedly installed on both sides of the groove on the top surface of the mobile platform 11. The end of the No. 1 hydraulic rod 25 close to the silo 13 is fixedly connected to the side frame 21, and the side of the side frame 21 close to the silo 13 is fixedly installed with a No. 1 support plate 22, a No. 2 support plate 23 and a No. 3 support plate 24 from top to bottom. The No. 1 support plate 22 is arranged on the lower side of the seventh layer of the silo 13, the No. 2 support plate 23 is arranged on the lower side of the second layer of the silo 13, and the No. 3 support plate 24 is arranged on the lower side of the first field of the silo 13. The No. 1 support plate 22, the No. 2 support plate 23 and the No. 3 support plate 24 can be respectively inserted into the bottom surface of the material tray 17 at the corresponding layer in the silo 13. The switching device includes a transmission roller 26. The dry transmission roller 26 is rotatably installed on the top surface of the No. 1 support plate 22, and between the bottom surface of the No. 2 support plate 23 and the top surface of the No. 3 support plate 24. The plurality of transmission rollers 26 are grouped in pairs, and the outer walls of the transmission rollers 26 in the same group are sleeved with a conveyor belt 27. The transmission rollers 26 in the same group are connected through the conveyor belt 27 for transmission. The bottom surface of the No. 1 support plate 22 and the top surface of the No. 2 support plate 23 are fixedly installed with a plurality of motors 28. The plurality of motors 28 correspond to the plurality of transmission rollers 26. The output ends of the motors 28 are close to one end of the corresponding transmission rollers 26, respectively penetrate the No. 1 support plate 22 or the No. 2 support plate 23 and are fixedly connected to the corresponding transmission rollers 26. The switching device includes a No. 2 hydraulic rod 29, which is embedded and installed on the bottom surface of the inner wall of the groove on the top surface of the mobile platform 11. The No. 2 hydraulic rod 29 is arranged directly below the silo 13 away from the groove opening on the top surface of the mobile platform 11, and a support plate 30 is fixedly installed on the upper end of the No. 2 hydraulic rod 29.

[0030] In the above embodiment, it should be noted that the driving roller 26 is driven to rotate by starting the motor 28 to achieve the effect of driving the conveyor belt 27 to rotate. In the initial state, the six material trays 17 in the two silos 13 are all located at the first to sixth layers of the silo 13. The No. 2 hydraulic rod 29 is started to drive the support plate 30 to rise. The support plate 30 pushes the six material trays 17 in the silo 13 on one side to move up one layer. At this time, the support plate 30 is located on the bottom surface of the second layer of the silo 13, and the raw materials in the seventh layer of the material tray 17 in the silo 13 on one side are started. After the seventh layer of the material tray 17 is emptied, the No. 1 hydraulic rod 25 is started to push the side silos 13 on both sides. The frame 21 moves toward the silo 13, the side frame 21 drives the No. 1 support plate 22 to be inserted into the lower side of the seventh layer of the two silos 13, the side frame 21 drives the No. 2 support plate 23 to be inserted into the lower side of the second layer of the two silos 13, the side frame 21 drives the No. 3 support plate 24 to be inserted into the lower side of the first layer of the two silos 13, the side frame 21 drives the conveyor belt 27 on the surface of the transmission roller 26 to be close to the side of the material tray 17, then the No. 2 hydraulic rod 29 is started to drive the support plate 30 to descend to the lower side of the first layer of the silo 13, the material tray 17 located on the second layer of the silo 13 is supported by the No. 2 support plate 23 and remains on the second layer of the silo 13, then the motor 28 on the No. 1 support plate 22 is started to drive the transmission The roller 26 rotates, the transmission roller 26 drives the conveyor belt 27 on the No. 1 support plate 22 to rotate and drives the material tray 17 of the seventh layer of the silo 13 above the support plate 30 to slide along the No. 1 support plate 22 to the seventh layer of the adjacent silo 13, then the motor 28 on the No. 2 support plate 23 is started to drive the transmission roller 26 to rotate, the transmission roller 26 drives the conveyor belt 27 on the No. 2 support plate 23 to rotate and drive the material tray 17 of the first layer of the silo 13 away from the support plate 30 to slide along the No. 3 support plate 24 to the first layer of the silo 13 above the support plate 30, and finally the No. 1 hydraulic rod 25 is started to drive the side frame 21 away from the silo 13, and the side frame 21 drives the No. 1 support plate 22 and the No. 2 support plate 23 to slide. The plate 23 and the third support plate 24 are withdrawn from the bottom surface of the material tray 17, and the material trays 17 in the silo 13 away from the support plate 30 lose support and all drop down one layer. At this point, the six material trays 17 in the two silos 13 are again at the positions of the first to sixth layers of the silo 13, and the No. 2 hydraulic rod 29 is continued to be started to drive the support plate 30 to rise. The support plate 30 pushes the six material trays 17 in the silo 13 above it to move up one layer each, so that the raw materials in the material tray 17 on the seventh layer in the silo 13 can be used again, so as to achieve the effect of realizing the cyclic switching of the material trays 17 between the two silos 13, continuously storing the empty material trays 17 in the lower layer and pushing the new material trays 17 upward.

[0031] Example 4

[0032] like Figure 1-Figure 3As shown, an RGV trolley for automatic loading and unloading of machine tools includes all the contents of Example 1. In addition, a chassis 15 is fixedly installed on the top surface of the mobile platform 11, and the chassis 15 is arranged on one side of the groove on the top surface of the mobile platform 11. A robotic arm 16 is fixedly installed on the top surface of the chassis 15, and the robotic arm 16 can grab the raw materials in the uppermost material tray 17 of the silo 13 and move it to the machine tool.

[0033] In the above embodiment, it should be noted that the robot arm 16 is a prior art, and the robot arm 16 can only take the raw materials in the tray 17 on the seventh layer in the silo 13, and the robot arm 16 is used to transport the raw materials in the tray 17 to the machine tool.

[0034] The use process of the utility model is as follows: in the initial state, the six material trays 17 in the two silos 13 are all located at the first to sixth layers of the silo 13. The technicians in the field start the No. 2 hydraulic rod 29 to drive the support plate 30 to rise, and the support plate 30 pushes the six material trays 17 in one side of the silo 13 to move up one layer. At this time, the support plate 30 is located on the bottom surface of the second layer of the silo 13, and the mechanical arm 16 is started to start taking the raw materials in the seventh layer of the material tray 17 in the silo 13 on one side. After the seventh layer of the material tray 17 is emptied, the No. 1 hydraulic rod 25 is started to push the side frames 21 on both sides of the silo 13 toward the silo. 13 direction, the side frame 21 drives the No. 1 support plate 22 to insert into the lower side of the seventh layer of the two silos 13, the side frame 21 drives the No. 2 support plate 23 to insert into the lower side of the second layer of the two silos 13, the side frame 21 drives the No. 3 support plate 24 to insert into the lower side of the first layer of the two silos 13, the side frame 21 drives the conveyor belt 27 on the surface of the transmission roller 26 to be close to the side of the material tray 17, then the No. 2 hydraulic rod 29 is started to drive the support plate 30 to descend to the lower side of the first layer of the silo 13, the material tray 17 located on the second layer of the silo 13 is supported by the No. 2 support plate 23 and remains on the second layer of the silo 13, then the No. 1 support plate is started The motor 28 on the No. 2 support plate 22 drives the transmission roller 26 to rotate, and the transmission roller 26 drives the conveyor belt 27 on the No. 1 support plate 22 to rotate and drive the material tray 17 on the seventh layer of the silo 13 above the support plate 30 to slide along the No. 1 support plate 22 to the seventh layer of the adjacent silo 13, then the motor 28 on the No. 2 support plate 23 is started to drive the transmission roller 26 to rotate, and the transmission roller 26 drives the conveyor belt 27 on the No. 2 support plate 23 to rotate and drive the material tray 17 on the first layer of the silo 13 away from the support plate 30 to slide along the No. 3 support plate 24 to the first layer of the silo 13 above the support plate 30, and finally the No. 1 hydraulic rod 25 is started. The side frame 21 is driven away from the silo 13, and the side frame 21 drives the No. 1 support plate 22, the No. 2 support plate 23 and the No. 3 support plate 24 to withdraw from the bottom surface of the material tray 17. The material trays 17 in the silo 13 away from the support plate 30 lose support and all drop down one layer. At this point, the six material trays 17 in the two silos 13 are again at the first to sixth layers of the silo 13, and the No. 2 hydraulic rod 29 is continued to be started to drive the support plate 30 to rise. The support plate 30 pushes the six material trays 17 in the silo 13 above it to move up one layer each, so that the robotic arm 16 can take the raw materials in the seventh layer of the material tray 17 in the silo 13 again.

[0035] The above is only a preferred embodiment of the utility model. Any person skilled in the art may modify the utility model by using the above technical solution or modify it into an equivalent technical solution. Therefore, any simple modification or equivalent replacement based on the technical solution of the utility model shall fall within the scope of protection claimed by the utility model.

Claims

1. An RGV trolley for automatic loading and unloading of machine tools, comprising a mobile platform (11) and a guide rail (12), wherein the guide rail (12) is installed on the ground and extends to one side of the machine tool, the mobile platform (11) is slidably installed on the guide rail (12), one side of the top surface of the mobile platform (11) is provided with a groove, one end of the groove on the top surface of the mobile platform (11) extends to the side of the mobile platform (11), a material bin (13) can be inserted and installed in the groove on the top surface of the mobile platform (11), the groove on the top surface of the mobile platform (11) can carry two material bins (13), and multiple layers of material trays (17) are stacked in the material bin (13), characterized in that: Switching devices are fixedly installed on both sides of the groove on the top surface of the mobile platform (11), and the switching device can switch the material tray (17) on the upper layer of the material bin (13) to the material bin (13) on the adjacent side, and push the material tray (17) on the lower layer of the material bin (13) upwards.

2. The RGV trolley for automatic loading and unloading of machine tools according to claim 1 is characterized in that: The silo (13) is a rectangular frame structure, a slide rail (14) is fixedly installed in the center of one side of the two silos (13) away from each other, and side panels (18) are fixedly installed at both ends of the outer wall of the material tray (17), and the side panels (18) on both sides of the material tray (17) can be clamped on both sides of the slide rail (14) and slide up and down along the slide rail.

3. The RGV trolley for automatic loading and unloading of machine tools according to claim 2 is characterized in that: The material bin (13) is divided into seven layers from bottom to top, and the maximum capacity of the material bin (13) can accommodate seven material trays (17). Six material trays (17) are respectively placed in the two material bins (13) installed on the top surface of the mobile platform (11).

4. The RGV trolley for automatic loading and unloading of machine tools according to claim 3 is characterized in that: The switching device comprises a side frame (21), and the side frame (21) is arranged on both sides of two silos (13) on the top surface of the mobile platform (11). A plurality of No. 1 hydraulic rods (25) are fixedly installed on both sides of the groove on the top surface of the mobile platform (11), and one end of the No. 1 hydraulic rod (25) close to the silo (13) is fixedly connected to the side frame (21).

5. The RGV trolley for automatic loading and unloading of machine tools according to claim 4 is characterized in that: A first support plate (22), a second support plate (23) and a third support plate (24) are fixedly installed from top to bottom on one side of the side frame (21) close to the silo (13); the first support plate (22) is arranged on the lower side of the seventh layer of the silo (13); the second support plate (23) is arranged on the lower side of the second layer of the silo (13); and the third support plate (24) is arranged on the lower side of the first field of the silo (13); and the first support plate (22), the second support plate (23) and the third support plate (24) can be respectively inserted into the bottom surface of the material tray (17) at the corresponding layer in the silo (13).

6. The RGV trolley for automatic loading and unloading of machine tools according to claim 5 is characterized in that: The switching device comprises a transmission roller (26), wherein the plurality of transmission rollers (26) are rotatably mounted on the top surface of the No. 1 support plate (22), and between the bottom surface of the No. 2 support plate (23) and the top surface of the No. 3 support plate (24), wherein the plurality of transmission rollers (26) are arranged in groups of two, and the outer walls of the transmission rollers (26) in the same group are sleeved with a conveyor belt (27), and the transmission rollers (26) in the same group are connected by transmission through the conveyor belt (27), and the bottom surface of the No. 1 support plate (22) and the top surface of the No. 2 support plate (23) are both fixedly mounted with a plurality of motors (28), wherein the plurality of motors (28) correspond to the plurality of transmission rollers (26), and the motors (28) are close to one output end of the corresponding transmission roller (26), respectively penetrate the No. 1 support plate (22) or the No. 2 support plate (23) and are fixedly connected to the corresponding transmission roller (26).

7. The RGV trolley for automatic loading and unloading of machine tools according to claim 6 is characterized in that: The switching device comprises a No. 2 hydraulic rod (29), which is embedded and installed in the bottom surface of the inner wall of the groove on the top surface of the mobile platform (11), and the No. 2 hydraulic rod (29) is arranged directly below the silo (13) away from the groove opening on the top surface of the mobile platform (11), and a support plate (30) is fixedly installed on the upper end of the No. 2 hydraulic rod (29).

8. The RGV trolley for automatic loading and unloading of machine tools according to claim 1 is characterized in that: A chassis (15) is fixedly mounted on the top surface of the mobile platform (11), and the chassis (15) is arranged on one side of the groove on the top surface of the mobile platform (11). A mechanical arm (16) is fixedly mounted on the top surface of the chassis (15), and the mechanical arm (16) is capable of grabbing raw materials in the uppermost material tray (17) of the material bin (13) and moving it into the machine tool.

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