Multi-layer skip car for robot to automatically store parts

Abstract

The multi-layer skip car is characterized in that the multi-layer skip car comprises a car underframe, at least four part bracket stand columns and at least four part guiding stand columns, a containing space is arranged on the car underframe, and the part guiding stand columns and the part bracket stand columns are arranged on the side edges of the containing space; the part bracket stand column comprises a first support, two or more layers of overturning material supporting mechanisms and a connecting piece, each overturning material supporting mechanism comprises an overturning supporting plate, a first blocking rod, a connecting pin shaft and a balance weight piece, the overturning supporting plates are rotationally arranged on the first support and provided with supporting faces, the connecting pin shafts and the balance weight pieces are arranged at the ends of the overturning supporting plates, and the first blocking rods are arranged on the supporting faces. The first blocking rods are arranged above the overturning supporting plates, the upper connecting pin shafts and the lower connecting pin shafts which are adjacent to each other are connected through the connecting pieces, and the second blocking rods are arranged above the overturning supporting plate on the lowermost layer. The front floor assembly storage device can store more than two layers of front floor assemblies, so that the production efficiency of an automatic production line of the front floor assemblies can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile parts storage tooling, in particular to a multi-layer material car used for automatic storage of parts by robots. Background Art

[0002] The current OEM welding workshops generally have separate production lines for the three major parts (front floor, rear floor, and cabin), which are then welded together into a lower body assembly. The production processes involved in the automatic production line for the front floor assembly include spot welding and stud welding. After the production is completed to the end of the line, the handling operation is carried out by a robot. When placing the front floor assembly, it is necessary to manually switch the fixture on the stock before the robot can carry the front floor assembly to the fixture on the stock. Every time a front floor assembly is completed and placed, the production staff uses a pneumatic hoist to lift the front floor assembly down, and then allow the next robot to proceed to the next production process of placing the next part. There are cumbersome production operation processes and unsatisfactory production efficiency.

[0003] In the above-mentioned automatic production line of front floor assemblies, one of the factors affecting production efficiency is that since the warehouse cannot store multiple layers of front floor assemblies, every time a front floor assembly is completed and placed, the production staff needs to use a pneumatic hoist to lift the front floor assembly to the warehouse of the next production process, which not only wastes manpower but also affects efficiency. Therefore, the inventor designed a multi-layer material cart for storing multiple layers of front floor assemblies and conveniently transporting them to the next workstation, thereby improving production efficiency. Utility Model Content

[0004] The utility model aims to provide a multi-layer material cart for automatically storing parts by a robot, which can store more than two layers of front floor assemblies, thereby improving the production efficiency of the automatic production line of the front floor assemblies.

[0005] The purpose of the utility model is achieved through the following technical solutions:

[0006] A multi-layer material vehicle for automatic storage of parts by a robot, characterized in that: it comprises a vehicle frame, at least four parts bracket columns and at least four parts guide columns, a placement space for a front floor assembly is provided on the vehicle frame, four sides of the placement space are respectively provided with parts guide columns, the parts guide columns are used to limit the horizontal position of the front floor assembly, and two sides of the placement space are respectively provided with parts bracket columns;

[0007] The part bracket column includes a first bracket, more than two layers of flip support mechanisms and a connecting piece. The flip support mechanism includes a flip pallet, a first blocking rod, a connecting pin and a counterweight. The middle part of the flip pallet is rotatably arranged on the first bracket, and the end of the flip pallet close to the placement space is provided with a supporting surface. The connecting pin and the counterweight are arranged at the end of the flip pallet away from the placement space. The first blocking rod is arranged above the flip pallet. When the flip pallet supports the front floor assembly, the end of the flip pallet away from the placement space abuts against the first blocking rod. The upper and lower ends of the connecting piece are respectively provided with vertical long holes and round holes, and the upper and lower adjacent connecting pins are respectively connected by connecting pieces. A second blocking rod is provided above the flip pallet of the lowest layer. When the flip pallet is unloaded, the end of the flip pallet of the lowest layer close to the placement space abuts against the second blocking rod, so that a part of the supporting surface of the flip pallet of the lowest layer remains extended into the placement space.

[0008] Furthermore, the part guide column includes a second bracket and a guide cylindrical rod, the second bracket is vertically fixed on the vehicle bottom frame, the guide cylindrical rod is vertically installed on the second bracket, and the guide cylindrical rod is close to the placement space.

[0009] Furthermore, buckles are provided at the upper, middle and lower positions of the second bracket, and the upper, middle and lower parts of the guide cylindrical rod are respectively clamped on the buckles.

[0010] Furthermore, the upper end of the guide cylindrical rod is provided with a conical guide pin installed upward.

[0011] Furthermore, a limiting boss is provided at the lower end of the conical guide pin, a connecting cylinder is provided below the limiting boss, the guide cylindrical rod is provided with a middle hole, the conical guide pin is inserted into the middle hole of the guide cylindrical rod through the connecting cylinder, and the limiting boss abuts against the top of the guide cylindrical rod.

[0012] Furthermore, the first bracket includes a first bottom connecting plate, two L-shaped support plates and a cover plate, the first bottom connecting plate is fixedly mounted on the vehicle frame, the two L-shaped support plates are relatively mounted on the first bottom connecting plate, the cover plate covers the two L-shaped support plates, and the flip support plate, the first blocking rod and the second blocking rod are all mounted between the two L-shaped support plates.

[0013] Furthermore, the counterweight is a counterweight cylinder, which is mounted on a connecting pin.

[0014] Furthermore, at least two guide wheel groups are provided below the vehicle chassis, and the guide wheel groups include two guide wheels relatively arranged on two sides, and the rotation axis of the guide wheels is vertically downward.

[0015] Furthermore, at least two supporting wheel groups are provided below the vehicle chassis, and the supporting wheel groups include two supporting wheels relatively arranged on two sides, and the rotation axis of the supporting wheels is horizontal.

[0016] Furthermore, a position stopper and a position sensing sheet are provided at the front side of the vehicle chassis.

[0017] Compared with the prior art, the utility model has the following beneficial effects:

[0018] The multi-layer material cart of the utility model can store more than two layers of front floor assemblies. When the robot puts the front floor assembly into the placement space of the multi-layer material cart, the flipping support plate of the flipping support mechanism will automatically hold the front floor assembly. Each time a layer of floor assembly is put in, the flipping support plate of the upper layer will be driven to flip under the linkage action of the connecting piece, so that the flipping support plate of the upper layer can be used to hold the front floor assembly without manual operation, so that it can cooperate well with the robot to automatically store the front floor assembly and realize multi-layer storage. The horizontal position of the front floor assembly stored in the placement space is limited by the part guide column, which can prevent the front floor assembly from shaking and deviating when pushing the multi-layer material cart, and can be transported more stably and safely.

[0019] By storing and transporting the multi-layer front floor assembly through the multi-layer material cart of the utility model, the effect of reducing costs and increasing efficiency can be achieved, thereby improving production efficiency and reducing costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a three-dimensional schematic diagram of a multi-layer material car according to an embodiment of the utility model;

[0021] Figure 2 It is a three-dimensional schematic diagram of a part guide column of an embodiment of the utility model;

[0022] Figure 3 It is a three-dimensional schematic diagram of the second bracket of the part guide column of the embodiment of the utility model;

[0023] Figure 4 It is a three-dimensional schematic diagram of a conical guide pin of a part guide column of an embodiment of the utility model;

[0024] Figure 5 It is a three-dimensional schematic diagram of the buckle of the part guide column of the embodiment of the utility model;

[0025] Figure 6 It is a three-dimensional schematic diagram of a part bracket column of an embodiment of the utility model;

[0026] Figure 7 It is a three-dimensional schematic diagram of the embodiment of the utility model when the parts bracket column hides the counterweight and the L-shaped support plate on one side, and at this time, the bottom flip support plate is in a state of supporting the front floor assembly;

[0027] Figure 8 It is a schematic diagram of the state of the bottom flipping tray of the parts bracket column of the embodiment of the utility model when it is unloaded;

[0028] Fig. 9 It is a schematic diagram of the state of the flipped pallet in the part bracket column when the front floor assembly is fully loaded in the embodiment of the utility model;

[0029] Fig.10 It is a structural schematic diagram of a connecting piece of an embodiment of the utility model;

[0030] Fig.11 It is a three-dimensional schematic diagram of a multi-layer material cart according to an embodiment of the utility model when a front floor assembly at the bottom layer is placed;

[0031] Fig.12 This is a schematic diagram of the structure of the bottommost flip support plate of the embodiment of the utility model supporting the front floor assembly;

[0032] Fig.13 It is a structural schematic diagram of the front end of the vehicle underframe of an embodiment of the utility model;

[0033] Fig.14 It is a three-dimensional schematic diagram of the vehicle underframe of an embodiment of the utility model when viewed from above;

[0034] Fig.15 yes Fig.14 The enlarged schematic diagram of point A in the middle;

[0035] Fig.16 It is a structural schematic diagram of a universal wheel according to an embodiment of the utility model.

[0036] Meaning of reference numerals in the figure:

[0037] 1-car frame; 1.1-in-place sensor; 1.2-in-place stopper; 2-part guide column; 2.1-second bottom connecting plate; 2.2-buckle; 2.3-second bracket; 2.4-guide cylindrical rod; 2.5-conical guide pin; 2.6-limiting boss; 2.7-connecting cylinder; 2.8-mounting plate; 2.9-notch; 2.10-arc bayonet; 2.11-threaded hole; 3-part bracket column; 3.1-first bottom connecting plate; 3.2-L-shaped support plate; 3.4-counterweight; 3.5-flip tray; 3. 6-cover plate; 3.7-connecting plate; 3.8-supporting surface; 3.9-second blocking rod; 3.10-first blocking rod; 3.11-connecting pin; 3.12-mounting shaft; 3.13-long hole; 3.14-round hole; 4-guide wheel; 4.1-second L-shaped mounting block; 4.2-gasket; 4.3-first L-shaped mounting block; 5-support wheel; 5.1-support plate; 5.2-connecting plate; 6-one-way wheel; 7-universal wheel; 7.1-foot pedal; 8-placing space; 9-front floor assembly; 10-handle; 11-flip-type hook. DETAILED DESCRIPTION

[0038] The utility model is further described below in conjunction with embodiments.

[0039] In the description of the present invention, it should be understood that descriptions involving orientation, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0040] In the description of the present utility model, "several" means one or more, "more" means more than two, "greater than", "less than", "exceed" etc. are understood to exclude the number itself, and "above", "below", "within" etc. are understood to include the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0041] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0042] Example:

[0043] like Figures 1 to 16 The multi-layer material cart for automatic storage of parts by robots according to this embodiment is shown, which includes a vehicle chassis 1 , four part support columns 3 and eight part guide columns 2 .

[0044] Two one-way wheels 6 are provided below the front end of the vehicle chassis 1, and two universal wheels 7 are provided below the rear end. Conventional pedals 7.1 for locking are provided on the universal wheels 7. A handle 10 is provided above the rear end of the vehicle chassis 1, and the multi-layer material cart can be conveniently pushed by the handle 10. In this embodiment, a flip-type pull hook 11 is also provided at the rear end of the vehicle chassis 1, and the flip-type pull hook 11 can be connected to an external transport device to drive the multi-layer material cart to move.

[0045] The underframe 1 is provided with a placement space 8 for the front floor assembly 9. The placement space 8 is a space for placing the front floor assembly 9 of the automobile, and its size is the same as that of the front floor assembly 9. The front floor assembly 9 will be stored layer by layer in the placement space 8. Parts guide columns 2 are respectively provided on the four sides of the placement space 8, wherein one part guide column 2 is respectively provided in the middle of the left and right sides, and three part guide columns 2 are respectively provided on the front and rear sides. The part guide columns 2 are close to the edge of the placement space 8 and are used to limit the horizontal position of the front floor assembly 9 so that the front floor assembly 9 will not shake or deviate when the multi-layer material cart is pushed to transport the front floor assembly 9.

[0046] like Figures 2 to 5 As shown, the part guide column 2 of this embodiment includes a second bracket 2.3 and a guide cylindrical rod 2.4. The second bracket 2.3 is a groove-type plate. The lower end of the second bracket 2.3 is provided with a second bottom connecting plate 2.1, which is vertically fixed to the upper part of the vehicle bottom frame 1 through the second bottom connecting plate 2.1. Buckles 2.2 are respectively provided at the upper, middle and lower positions of the second bracket 2.3. A mounting plate 2.8 is provided on the buckle 2.2. The mounting plate 2.8 is fixedly installed in the groove of the second bracket 2.3 by screws. The front end of the buckle 2.2 is provided with an arc-shaped bayonet 2.10. The middle part of the buckle 2.2 is provided with a notch 2.9 that penetrates from top to bottom. A threaded hole 2.11 that penetrates from left to right is provided on the side. A locking bolt is threadedly connected in the threaded hole 2.11 (the locking bolt is not shown in the figure). The guide cylindrical rod 2.4 is installed vertically, and the upper, middle and lower parts of the guide cylindrical rod 2.4 are respectively clamped on the buckle 2.2. By tightening the locking bolt, the guide cylindrical rod 2.4 can be locked on the buckle 2.2. The guide cylindrical rod 2.4 is close to the edge of the placement space 8, and the horizontal position of the front floor assembly 9 is limited by the guide cylindrical rod 2.4.

[0047] The upper end of the guide cylindrical rod 2.4 of this embodiment is provided with a conical guide pin 2.5 installed upward, and the lower end of the conical guide pin 2.5 is provided with a limiting boss 2.6. A connecting cylinder 2.7 is provided below the limiting boss 2.6. The guide cylindrical rod 2.4 is provided with a middle hole and is a hollow cylinder. The conical guide pin 2.5 is inserted into the middle hole of the guide cylindrical rod 2.4 through the connecting cylinder 2.7, and the limiting boss 2.6 abuts against the top of the guide cylindrical rod 2.4.

[0048] Parts bracket columns 3 are respectively provided on the left and right sides of the placement space 8 , and the parts bracket columns 3 are used to support the two side edges of the front floor assembly 9 .

[0049] like Figures 6 to 10 As shown, the part bracket column 3 of this embodiment includes a first bracket, a four-layer flip support mechanism and three connecting pieces 3.7. The first bracket includes a first bottom connecting plate 3.1, two L-shaped support plates 3.2 and a cover plate 3.6. The first bottom connecting plate 3.1 is fixedly mounted on the vehicle bottom frame 1 by bolts, the two L-shaped support plates 3.2 are relatively mounted on the first bottom connecting plate 3.1, and the cover plate 3.6 covers the two L-shaped support plates 3.2, and an installation space is formed between the two L-shaped support plates 3.2. The four-layer flip support mechanism is installed on the first bracket layer by layer from bottom to top.

[0050] The flip support mechanism includes a mounting shaft 3.12, a flip support plate 3.5, a first blocking rod 3.10, a connecting pin 3.11 and a counterweight 3.4. The middle part of the flip support plate 3.5 is rotatably connected between the two L-shaped support plates 3.2 through the mounting shaft 3.12, and the flip support plate 3.5 can be flipped up and down. The end of the flip support plate 3.5 close to the placement space 8 is provided with a supporting surface 3.8, and the supporting surface 3.8 is used to support the side of the front floor assembly 9. The first blocking rod 3.10 is installed between the two L-shaped support plates 3.2 and is located above the flip support plate 3.5. The first blocking rod 3.10 is offset to the side of the rotation center of the flip tray 3.5 away from the placement space 8, and the flip tray 3.5 can be flipped 90 degrees. When the flip tray 3.5 supports the front floor assembly 9, the support surface 3.8 of the flip tray 3.5 will be in a horizontal state, and the end of the flip tray 3.5 away from the placement space 8 will abut against the first blocking rod 310. In this embodiment, the end of the flip tray 3.5 away from the placement space 8 is tilted backward and upward.

[0051] A second blocking rod 3.9 is provided above the bottom flip tray 35, and the second blocking rod 3.9 is installed between the two L-shaped support plates 3.2. The second blocking rod 3.9 is offset to the side of the rotation center of the flip tray 3.5 close to the placement space 8. When the flip tray 3.5 is unloaded, that is, the front floor assembly 9 has not been placed in the multi-layer material vehicle, the end of the bottom flip tray 3.5 close to the placement space 8 abuts against the second blocking rod 3.9, so that a part of the support surface 3.8 of the bottom flip tray 3.5 remains extended into the placement space 8, so that when the bottom front floor assembly 9 is placed, the bottom flip tray 3.5 can support the front floor assembly 9.

[0052] The connecting pin 3.11 is transversely arranged at the end of the flip support plate 3.5 away from the placement space 8, and the upper and lower ends of the connecting piece 3.7 are respectively provided with a vertical long hole 3.13 and a round hole 3.14, and the upper and lower adjacent connecting pins 3.11 are respectively connected by the connecting piece 3.7, and the adjacent flip support mechanisms are linked by the connecting piece 3.7. The long hole 313 at the upper end of the connecting piece 3.7 is connected to the connecting pin 3.11 of the flip support mechanism of the upper layer, and the connecting pin 3.11 can move up and down in the long hole 3.13, and the round hole 3.14 at the lower end of the connecting piece 3.7 is sleeved on the connecting pin 3.11 of the flip support mechanism of the lower layer, and can rotate relatively.

[0053] The counterweight 3.4 of this embodiment is a counterweight cylinder, which is mounted on the connecting pin 3.11. The counterweight 3.4 is used to add weight to the end of the flip pallet 3.5 away from the placement space 8. When the flip pallet 3.5 is unloaded, the end of the flip pallet 3.5 away from the placement space can be flipped downward by the weight of the counterweight 3.4, while the end of the flip pallet 3.5 close to the placement space can be flipped upward.

[0054] The process of loading the front floor assembly 9 of the multi-layered material cart of the present embodiment is as follows: when the multi-layered material cart is empty, that is, when the front floor assembly 9 is not placed, the flip support plate 3.5 of the flip support mechanism of the lowest layer is kept tilted toward the placement space 8 under the action of the second blocking rod 3.9, so that a part of its support surface 3.8 extends into the placement space 8, and is in a state of preparing to store the front floor assembly 9, such as Figure 8 The flip support plates 3.5 of the flip support mechanisms of the other three layers above are flipped upward into the first bracket under the gravity of the counterweight 3.4 and will not extend into the placement space 8, thereby not blocking the front floor assembly 9 from being placed on the bottom layer. Fig.11 As shown in FIG. 1 , when the robot places the first front floor assembly into the placement space 8 of the multi-layer material cart, a portion of the flip tray 3.5 of the bottom flip support mechanism extends into the placement space 8, so the first front floor assembly will be supported by the bottom flip tray 3.5. At this time, the state of the flip tray 3.5 of the part bracket column will be as follows: Figure 7 As shown, the bottom flip pallet 3.5 is in a horizontal state, supported under the side of the front floor assembly 8. Under the linkage action of the connecting piece 3.7, the second flip pallet 3.5 from the bottom to the top will flip toward the placement space 8, so that a part of the flip pallet 3.5 of the second layer extends into the placement space 8, in a state ready to store the front floor assembly, while the other two flip pallets 3.5 above will still not flip and extend into the placement space 8, and therefore will not block the front floor assembly 9 from being placed on the second layer. When the robot places the second front floor assembly into the placement space 8 of the multi-layer material cart, it will be supported by the flip pallet 3.5 of the second layer, and the flip pallet 3.5 of the third layer will flip toward the placement space under the linkage action of the connecting piece 3.7, and so on. Eventually, the multi-layer material cart of this embodiment will be able to place four layers of front floor assemblies 9, and the four sides of the front floor assembly 9 will be limited by the guide cylindrical rods. When the multi-layer material cart is full of four layers of front floor assemblies 9, the state of the flip pallet 3.5 of the part bracket column 3 will be as shown. Fig. 9 After placement, the worker can push the multi-layer material cart to the storage location of the next production process, and the next robot will unload the front floor assembly on the multi-layer material. During the unloading process, each time a front floor assembly 9 is lifted, the corresponding layer of the flip tray 3.5 will be gradually reset under the gravity of the counterweight 3.4.

[0055] like Fig.14 and Fig.15As shown, in this embodiment, two guide wheel groups are provided under the vehicle frame 1, and the two guide wheel groups are arranged front and back. The guide wheel groups include two guide wheels 4 arranged on both sides relatively, and the rotation axis of the guide wheel 4 is vertically downward. The guide wheel 4 is installed through a first L-shaped mounting block 4.3 and a second L-shaped mounting block 4.1, wherein one side of the first L-shaped mounting block 4.3 is fixed to the bottom of the vehicle frame 1 by bolts, one side of the second L-shaped mounting block 4.1 is fixedly connected with the other side of the first L-shaped mounting block 4.3 by bolts, and the guide wheel 4 is rotatably installed on the other side of the second L-shaped mounting block 4.1. A gasket 4.2 is provided between the first L-shaped mounting block 4.3 and the second L-shaped mounting block 4.1, and the position of the guide wheel 4 can be adjusted by adjusting the number and thickness of the gasket 4.2.

[0056] Guide rails will be set on both sides of the storage space for parking the multi-layer material carts of the front floor assembly automatic production line, and the guide wheels 4 are used to cooperate with the guide rails. When the multi-layer material cart is pushed into the storage space, the guide wheels 4 will slide in the guide rails to guide the movement of the multi-layer material cart so that the multi-layer material cart can be pushed in accurately.

[0057] like Fig.13 As shown, in this embodiment, an in-position stopper 1.2 and an in-position sensing sheet 1.1 are provided on the front side of the vehicle chassis 1, and a corresponding sensor is provided inside the corresponding storage position. The in-position sensing sheet 1.1 is used to cooperate with the sensor. When the multi-layer material vehicle is pushed into the storage position and parked in place, the in-position stopper 1.2 will abut against the inside of the storage position, and the sensor will sense the in-position sensing sheet 1.1, thereby obtaining a signal of the parking position of the multi-layer material vehicle.

[0058] like Fig.14 and Fig.15 As shown, in this embodiment, two supporting wheel groups are provided under the vehicle chassis 1, and the two supporting wheel groups are arranged front and back. The supporting wheel groups include two supporting wheels 5 arranged on both sides relatively, and the rotation axis of the supporting wheel 5 is horizontal. The supporting wheel 5 is installed through a mounting seat, and the mounting seat is provided with a connecting plate 5.2. The connecting plate 5.2 is fixed to the bottom of the vehicle chassis 1 by bolts. Support plates 5.1 are provided on both sides below the connecting plate 5.2, and a wheel axle is provided between the two supporting plates 5.1. The supporting wheel 5 is rotatably installed on the wheel axle. In the storage position for parking multi-layer material carts of the front floor assembly automatic production line, a supporting base protruding upward will be provided. When the multi-layer material cart is pushed into the storage position, the supporting wheel 5 will roll to the top of the supporting base, and the multi-layer material cart will be lifted up by the supporting base for parking.

[0059] The above-mentioned embodiments of the utility model are not intended to limit the protection scope of the utility model, and the implementation methods of the utility model are not limited to these. All other various forms of modifications, replacements or changes made to the above-mentioned structure of the utility model based on the above-mentioned contents of the utility model, in accordance with the common technical knowledge and customary means in the field, without departing from the above-mentioned basic technical ideas of the utility model, should fall within the protection scope of the utility model.

Claims

1. A multi-layered material cart for automatic storage of parts by a robot, characterized in that: The vehicle comprises a chassis, at least four parts bracket columns and at least four parts guide columns, wherein a placement space for the front floor assembly is provided on the chassis, and the parts guide columns are respectively provided on four sides of the placement space, and the parts guide columns are used to limit the horizontal position of the front floor assembly, and the parts bracket columns are respectively provided on two sides of the placement space; The part bracket column includes a first bracket, more than two layers of flip support mechanisms and a connecting piece, the flip support mechanism includes a flip pallet, a first blocking rod, a connecting pin and a counterweight, the middle part of the flip pallet is rotatably arranged on the first bracket, the end of the flip pallet close to the placement space is provided with a supporting surface, the connecting pin and the counterweight are arranged at the end of the flip pallet away from the placement space, the first blocking rod is arranged above the flip pallet, when the flip pallet supports the front floor assembly, the end of the flip pallet away from the placement space abuts on the first blocking rod, the upper and lower ends of the connecting piece are respectively provided with vertical long strip holes and round holes, the upper and lower adjacent connecting pins are respectively connected by the connecting piece, a second blocking rod is arranged above the flip pallet of the lowest layer, when the flip pallet is unloaded, the end of the flip pallet of the lowest layer close to the placement space abuts on the second blocking rod, so that a part of the supporting surface of the flip pallet of the lowest layer remains extended into the placement space.

2. The multi-layered material cart for automatic storage of parts by robots according to claim 1, characterized in that: The part guide column includes a second bracket and a guide cylindrical rod, the second bracket is vertically fixed on the vehicle bottom frame, the guide cylindrical rod is vertically installed on the second bracket, and the guide cylindrical rod is close to the placement space.

3. The multi-layered material cart for automatic storage of parts by robots according to claim 2 is characterized in that: Buckles are respectively arranged at the upper, middle and lower positions of the second bracket, and the upper, middle and lower positions of the guide cylindrical rod are respectively clamped on the buckles.

4. The multi-layered material cart for automatic storage of parts by robots according to claim 2, characterized in that: The upper end of the guide cylindrical rod is provided with a conical guide pin installed upward.

5. The multi-layered material cart for automatic storage of parts by robots according to claim 4, characterized in that: A limiting boss is provided at the lower end of the conical guide pin, a connecting cylinder is provided below the limiting boss, the guiding cylindrical rod is provided with a central hole, the conical guide pin is inserted into the central hole of the guiding cylindrical rod through the connecting cylinder, and the limiting boss abuts against the top of the guiding cylindrical rod.

6. The multi-layered material cart for automatic storage of parts by robots according to claim 1, characterized in that: The first bracket includes a first bottom connecting plate, two L-shaped support plates and a cover plate, the first bottom connecting plate is fixedly mounted on the vehicle bottom frame, the two L-shaped support plates are relatively mounted on the first bottom connecting plate, the cover plate covers the two L-shaped support plates, and the flip support plate, the first blocking rod and the second blocking rod are all mounted between the two L-shaped support plates.

7. The multi-layered material cart for automatic storage of parts by robots according to claim 1, characterized in that: The counterweight member is a counterweight cylinder, and the counterweight cylinder is installed on the connecting pin shaft.

8. The multi-layered material cart for automatic storage of parts by robots according to claim 1, characterized in that: At least two guide wheel groups are arranged below the vehicle chassis. The guide wheel groups include two guide wheels arranged opposite to each other on both sides. The rotation axes of the guide wheels are vertically downward.

9. The multi-layered material cart for automatic storage of parts by robots according to claim 1, characterized in that: At least two supporting wheel groups are arranged below the vehicle bottom frame. The supporting wheel groups include two supporting wheels arranged opposite to each other on two sides, and the rotation axis of the supporting wheels is horizontal.

10. The multi-layered material cart for automatic storage of parts by robots according to claim 1, characterized in that: The front side of the vehicle underframe is provided with an in-position stopper and an in-position sensing sheet.

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