Conveying device and production line applying same

Abstract

The invention relates to a conveying device which comprises a conveying line on a frame body, the conveying line comprises a first station located at one end of the frame body and a second station located at the other end of the frame body, the conveying device is characterized by further comprising a third station located between the first station and the second station, and a first manipulator is arranged adjacent to the third station; the third station is provided with a first jacking mechanism corresponding to the first mechanical arm, the first jacking mechanism is matched with the first mechanical arm or the conveying line so as to transfer workpieces to be transferred, and one of the first station and the second station can be selectively used for carrying out feeding or discharging actions opposite to those of the third station. The conveying device has the advantages that the conveying line of the conveying device is provided with the first station and the second station and further comprises the third station, and the first station and the second station can be alternatively used for carrying out feeding or discharging opposite to the third station, so that once the first station breaks down, the third station can be used for carrying out feeding or discharging opposite to the third station; and the second station can still work, so that the situation that the whole conveying line cannot operate is avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of conveying devices, and in particular to a conveying device used for automobile parts production and a production line using the conveying device. Background Art

[0002] At present, the production process of automotive parts often involves the processing of long strip workpieces such as I-beams. For the sake of efficiency and safety, more and more companies have begun to adopt automated conveying devices to complete the loading and unloading of workpieces and other conveying tasks. Commonly used automated conveying devices can refer to the Chinese invention patent "Sheet material unloading device and sheet material unloading method" with patent number ZL202110036425.8 or the Chinese invention patent application "A wheel production line rolling machine artificial intelligence loading equipment" with application number CN202010285958.5 (publication number CN111285112A) Provided in the conveying device.

[0003] Specifically, the existing conveying device usually has a conveying line, and uses the two ends of the conveying line to carry out loading and unloading operations, which may be named the loading end and the unloading end respectively. Robots corresponding to the two ends are arranged at positions adjacent to the loading end and the unloading end to complete the loading and unloading actions of the workpiece. Correspondingly, a jacking mechanism is usually arranged at the loading end and the unloading end to cooperate with the corresponding robots, that is, when the jacking mechanism is in the jacking state, it can cooperate with the robot to transfer the workpiece, and when the jacking mechanism is in the descending state, it can cooperate with the conveying line to transfer the workpiece.

[0004] However, the existing conveying device still has the following defects during implementation: First, the above-mentioned conveying device has a problem that, for example, once the robot at any end fails, the entire conveying line will be unable to continue operating and can only wait for the failed robot to be repaired; second, when the above-mentioned conveying device is transporting workpieces, if unqualified parts appear, the unqualified parts will be transported to the same end as the qualified parts, and even if marks are set on the unqualified parts, the workload of additional separation will increase. Third, when the robot transfers the workpiece to the lifting mechanism, and when the lifting mechanism transfers the workpiece to the conveying line, since the long workpiece has a certain length, the two ends of the workpiece will sometimes be offset under the contact of external force during the transfer process. Therefore, it is necessary to further improve the existing technology. Summary of the invention

[0005] The first technical problem to be solved by the present invention is to provide a conveying device capable of preventing the entire conveying line from being unable to operate when a fault occurs at one end of the conveying line in response to the above-mentioned existing technical status.

[0006] The second technical problem to be solved by the present invention is to provide a conveying device capable of conveying qualified parts and unqualified parts to different positions in response to the above-mentioned existing technical status.

[0007] The third technical problem to be solved by the present invention is to provide a conveying device capable of preventing the workpiece from being offset during the process of transferring the workpiece in response to the above-mentioned existing technical status.

[0008] The fourth technical problem to be solved by the present invention is to provide a production line with a conveying device in view of the above-mentioned existing technical status.

[0009] The technical solution adopted by the present invention to solve the first technical problem is: the conveying device includes a frame, a conveying line for conveying the workpiece to be transferred is provided on the frame, the conveying line includes a first station located at one end of the frame and a second station located at the other end of the frame, and is characterized in that it also includes:

[0010] A third workstation, located between the first workstation and the second workstation;

[0011] A first robot for loading or unloading materials onto the conveyor line is provided adjacent to the third station, and the third station is provided with a first lifting mechanism corresponding to the first robot. The first lifting mechanism can cooperate with the first robot in a lifted state, or cooperate with the conveyor line in a lowered state to transfer the workpiece to be transferred. Correspondingly, the first station and the second station can be selectively used to perform loading or unloading actions opposite to those of the third station.

[0012] In order to improve the working efficiency of loading or unloading, preferably, the first station and / or the second station is provided with a second manipulator for loading or unloading, and correspondingly, a second lifting mechanism corresponding to the second manipulator is also provided adjacent to the second manipulator, and the second lifting mechanism can cooperate with the second manipulator in the lifting state, or cooperate with the conveyor line in the lowering state to transfer the workpiece to be transferred. Compared with the traditional operation of completing the loading or unloading action by the operator, the second manipulator cooperates with the second lifting mechanism, which is more efficient, and it should be noted that the second lifting mechanism is provided to better cooperate with the second manipulator. According to actual needs, even if the second lifting mechanism is not provided, the second manipulator can complete the loading or unloading action.

[0013] In order to realize that the second lifting mechanism has the function of transferring the workpiece to be transferred, preferably, the second lifting mechanism is only arranged at the first station, and the second station completes the corresponding loading or unloading action through the operator, and the second lifting mechanism includes a first platform, and the first platform is provided with a placement piece for placing the workpiece to be transferred, and the frame is provided with a first driving source connected to the first platform, so as to drive the first platform to move upward to a lifting state or downward to a descending state. The second lifting mechanism is only arranged at the first station, and the second station completes the corresponding loading or unloading action through the operator, considering that the first station is a common station, and the second station is only used for transferring unqualified parts, or the first station fails, etc., so the operator can be used to load or unload, and when the second lifting mechanism drives the first platform to rise to the lifting state through the first driving source, it can be understood that the first platform and the placement piece are independently erected on the conveyor line, thereby avoiding interference of other components on the conveyor line to the second manipulator, so that the second manipulator can cooperate with the first platform more smoothly to complete the transfer of the workpiece to be transferred.

[0014] In order to solve the second technical problem, preferably, the workpieces to be transferred include qualified parts and unqualified parts, and the third station is used to load the materials onto the conveyor line, and correspondingly, the first station is used to unload qualified parts, and the second station is used to unload unqualified parts. By using the third station to load the materials onto the conveyor line, and the first station is used to unload qualified parts, and the second station is used to unload unqualified parts, it means that unqualified parts can be directly separated for subsequent testing, rework, etc., without spending extra time to separate unqualified parts from a large number of qualified parts, which greatly improves work efficiency.

[0015] In order to realize the function of the first lifting mechanism to transfer the workpiece to be transferred, preferably, the first lifting mechanism includes a second platform, the second platform is provided with the placement piece, and the frame is provided with a second driving source connected to the second platform, so as to drive the second platform to move upward to a lifting state or downward to a lowering state. Similar to the second lifting mechanism, the first lifting mechanism is provided with a second platform, and the second platform receives the workpiece to be transferred through the placement piece, and the second platform is connected to the second driving source to achieve the action of rising and falling.

[0016] In order to load the material to the conveyor line through the third station, preferably, a truss is provided above the third station, and a conveying mechanism for conveying the workpiece to be transferred is provided on the truss. Correspondingly, the first manipulator is located on the truss, so as to transfer the workpiece to be transferred on the conveying mechanism to the first lifting mechanism. The conveying mechanism on the truss is used to convey the workpiece to be transferred, for example, which has undergone the previous process, to the third station, and then the first manipulator can cooperate with the first lifting mechanism to transfer the workpiece to be transferred to the third station of the conveyor line.

[0017] In order to ensure that the workpieces to be transferred can be smoothly transported on the conveyor line, preferably, the middle part of the frame has a working space for setting the conveyor line, and the conveyor line includes a conveyor chain located on both sides of the working space along a direction perpendicular to the conveying direction, and the conveyor chain is provided with the placing member, and correspondingly, the frame is provided with stoppers on both sides of the working space along a direction perpendicular to the conveying direction, and the two stoppers extend along the conveying direction and a preset distance is maintained between the two stoppers for the placement of the workpieces to be transferred. The stoppers are provided on both sides of the working space along a direction perpendicular to the conveying direction, which can ensure the correct position of the workpieces to be transferred when loading onto the conveyor line, and avoid interference with other components during the subsequent conveying process.

[0018] In order to facilitate the first lifting mechanism to transfer the workpiece to be transferred, preferably, each of the position-limiting members corresponding to the third station is also provided with a guide member, and the guide member has a guide surface extending from top to bottom and tilted toward the first lifting mechanism, so as to play a guiding role when the first lifting mechanism descends to transfer the workpiece to be transferred to the placement member located at the third station. Such a design is based on the consideration that the workpiece to be transferred has a certain length. Once there is an offset, when the first lifting mechanism receives the workpiece to be transferred from the first manipulator and descends to the conveyor line, the end of the workpiece to be transferred will sometimes interfere with the position-limiting member, resulting in the inability to correctly complete the transfer of the workpiece to be transferred. Therefore, the above-mentioned guide member with a guide surface is provided. When the workpiece to be transferred descends with the first lifting mechanism, if the workpiece to be transferred is offset, the guide surface can contact the end of the workpiece to be transferred, and guide the workpiece to be transferred to a suitable range to avoid interference with the position-limiting member.

[0019] In order to solve the third technical problem, the conveyor line is provided with at least two placement pieces for placing the workpiece to be transferred at intervals along the conveying direction, and the placement piece includes at least two sub-placement pieces arranged at intervals perpendicular to the conveying direction, and the sub-placement piece is at least partially recessed downward to form a groove for placing the workpiece to be transferred, and the bottom of the groove is provided with an adjustment hole for mounting to the conveyor line, and the adjustment hole extends along the conveying direction of the conveyor line, so that when the workpiece to be transferred is transferred to the sub-placement piece, the sub-placement piece can be adjusted along the conveying direction of the conveyor line under the resistance of the workpiece to be transferred. When the workpiece to be transferred contacts each sub-placement piece of the same placement piece, if the two ends of the workpiece to be transferred are offset, each sub-placement piece will be adaptively adjusted along the conveying direction to ensure that the workpiece to be transferred is correctly placed.

[0020] The conveying device is the conveying device defined in any one of claims 4 to 9, and the third station of the conveying device can be used to load or unload materials onto the conveying line;

[0021] When the third station is used to feed the material to the conveyor line, the following steps are included:

[0022] Step 1-1, the first manipulator transfers the workpiece to be transferred to the first lifting mechanism;

[0023] Step 1-2, the first lifting mechanism transfers the workpiece to be transferred to the third workstation;

[0024] Step 1-3, determining whether the workpiece to be transferred by the first lifting mechanism is a qualified workpiece, if so, transporting it to the first station through the conveyor line, if not, transporting it to the second station through the conveyor line;

[0025] When the third station is used to feed the material to the conveyor line, the following steps are included:

[0026] Step 2-1, the second manipulator transfers the workpiece to be transferred to the second lifting mechanism;

[0027] Step 2-2, the second lifting mechanism transfers the workpiece to be transferred to the first workstation;

[0028] Step 2-3, conveying the workpiece to be transferred to the third workstation via the conveyor line;

[0029] Step 2-4, determine whether the second manipulator or the second lifting mechanism fails. If so, load the material to the conveyor line through the second station. If not, return to step 2-1.

[0030] Compared with the prior art, the advantages of the present invention are that the conveying line of the conveying device not only has a first station and a second station located at both ends, but also includes a third station located between the first station and the second station. The third station is used for loading or unloading materials onto the conveying line. The first station and the second station can be selectively used to perform loading or unloading actions opposite to the third station. Therefore, once the first station fails, the second station can still work, thereby avoiding the situation where the entire conveying line cannot operate. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a schematic diagram of the structure of the conveying device in Example 1 of the present invention;

[0032] Figure 2 This is a schematic structural diagram of the conveying device in Embodiment 1 of the present invention from another angle;

[0033] Figure 3 It is a partial enlarged view of the conveying device in Example 1 of the present invention;

[0034] Figure 4 It is a structural schematic diagram of a truss and a first manipulator in Example 1 of the present invention;

[0035] Figure 5 This is a schematic structural diagram of a neutron placement component according to Embodiment 1 of the present invention;

[0036] Figure 6 This is a schematic diagram of the state of the workpiece to be transferred and the sub-placement member in the first state in Example 1 of the present invention;

[0037] Figure 7 It is a schematic diagram of the state in which the workpiece to be transferred and the sub-placement member are in the second state in Embodiment 1 of the present invention;

[0038] Figure 8 It is a schematic diagram of the state of the workpiece to be transferred and the sub-placement member in the third state in Embodiment 1 of the present invention;

[0039] Fig. 9 It is a schematic diagram of the state of the first lifting mechanism in the embodiment 1 of the present invention in the initial state;

[0040] Fig.10 This is a schematic diagram of the first lifting mechanism in the lifting state in Embodiment 1 of the present invention;

[0041] Fig.11 It is a schematic diagram of the state of the first lifting mechanism in the embodiment 1 of the present invention in the transfer state;

[0042] Fig.12 This is a schematic diagram of the state in which the first lifting mechanism in Embodiment 1 of the present invention is in a descending state;

[0043] Fig.13 It is a schematic diagram of the state of the second lifting mechanism in the embodiment 2 of the present invention in the initial state;

[0044] Fig.14 This is a schematic diagram of the second lifting mechanism in the lifting state in the second embodiment of the present invention;

[0045] Fig.15 It is a schematic diagram of the state in which the second lifting mechanism in Embodiment 2 of the present invention is in a moving state;

[0046] Fig.16 This is a schematic diagram of the state in which the second lifting mechanism in Example 2 of the present invention is in a descending state. DETAILED DESCRIPTION

[0047] The present invention is further described in detail below in conjunction with specific embodiments.

[0048] Example 1

[0049] like Figures 1 to 12 FIG. 1 is a preferred embodiment of the present invention. Figure 1The conveying device in this embodiment includes a frame 1, on which a conveying line 2 for conveying a workpiece A to be transferred is provided. The conveying line 2 includes a first station 21 located at one end of the frame 1 and a second station 22 located at the other end of the frame 1, and a third station 23 is provided between the first station 21 and the second station 22. A first manipulator 231 for loading materials onto the conveying line 2 is provided adjacent to the third station 23, and the third station 23 is provided with a first lifting mechanism 232 corresponding to the first manipulator 231. The first lifting mechanism 232 can cooperate with the first manipulator 231 in a lifting state, or cooperate with the conveying line 2 in a descending state to transfer the workpiece A to be transferred. Correspondingly, the first station 21 and the second station 22 can be selectively used to perform a material unloading action opposite to the third station 23. Specifically, in this embodiment, the first station 21 is provided with a second manipulator for unloading. Since the second manipulator is relatively conventional, it is not drawn in the attached drawings and will not be described in detail. A second lifting mechanism 24 corresponding to the second manipulator is also provided adjacent to the second manipulator. The second lifting mechanism 24 can cooperate with the second manipulator in the lifting state, or cooperate with the conveyor line 2 in the descending state to transfer the workpiece A to be transferred. Compared with the traditional operation of unloading by operators, the second manipulator is more efficient in cooperating with the second lifting mechanism 24. It should be noted that the second lifting mechanism 24 is provided in order to better cooperate with the second manipulator. According to actual needs, even if the second lifting mechanism 24 is not provided, the second manipulator can also complete the unloading action. The above-mentioned second lifting mechanism 24 includes a first platform 241, on which a placement member 25 for placing the workpiece A to be transferred is provided, and the frame 1 is provided with a first driving source 242 connected to the first platform 241, so as to drive the first platform 241 to move upward to the lifting state or downward to the descending state. When the second lifting mechanism 24 drives the first platform 241 to rise to the lifting state through the first driving source 242, it can be understood that the first platform 241 and the placement member 25 are independently erected on the conveyor line 2, thereby avoiding interference of other components on the conveyor line 2 with the second manipulator, so that the second manipulator can cooperate with the first platform 241 more smoothly to complete the transfer of the workpiece A to be transferred. In this embodiment, the second station 22 is completed by the operator to perform the corresponding unloading action, considering that the second station 22 is relatively not commonly used, so the operator can be used to unload the material.

[0050] Regarding the specific function and structure of the third station 23, the workpiece A to be transferred includes qualified parts and unqualified parts. The third station 23 is used to load materials onto the conveyor line 2. Correspondingly, the first station 21 is used to unload qualified parts, and the second station 22 is used to unload unqualified parts. By adopting the third station 23 to load materials onto the conveyor line 2, and the first station 21 is used to unload qualified parts, and the second station 22 is used to unload unqualified parts, it means that unqualified parts can be directly separated for subsequent testing, rework and other work without spending extra time to separate unqualified parts from a large number of qualified parts, thereby greatly improving work efficiency. Specifically, the first lifting mechanism 232 includes a second platform 233, on which a placement member 25 is provided, and the frame 1 is provided with a second driving source 234 connected to the second platform 233, thereby driving the second platform 233 to move upward to a lifting state or downward to a descending state. As Figure 4 As shown, a truss 26 is provided above the third station 23, and a conveying mechanism for conveying the workpiece A to be transferred is provided on the truss 26. Correspondingly, a first manipulator 231 is located on the truss 26 to transfer the workpiece A to be transferred on the conveying mechanism to the first lifting mechanism 232. The conveying mechanism on the truss 26 is used to convey the workpiece A to be transferred that has undergone the previous process to the top of the third station 23, and then the workpiece A to be transferred can be transferred to the third station 23 of the conveyor line 2 by the first manipulator 231 in cooperation with the first lifting mechanism 232.

[0051] like Figure 2 As shown, considering that the workpiece A to be transferred in this embodiment has a certain length, the middle part of the frame 1 has a working space 11 for setting up the conveyor line 2. The conveyor line 2 includes a conveyor chain 27 located on both sides of the working space 11 along a direction perpendicular to the conveying direction. The conveyor chain 27 is provided with a placement member 25. Correspondingly, the frame 1 is provided with a limit member 12 on both sides of the working space 11 along a direction perpendicular to the conveying direction. The two limit members 12 extend along the conveying direction and a preset distance d is maintained between the two limit members 12 for the workpiece A to be transferred to be placed. The length of the workpiece A to be transferred in this embodiment is 1640 mm, and the preset distance d is 1646 mm. The working space 11 is provided with a limit member 12 on both sides perpendicular to the conveying direction, which can ensure the correct position of the workpiece A to be transferred when loading the conveyor line 2, and avoid interference with other components during the subsequent conveying process. As shown Figure 3As shown, a guide member 13 is also provided at the position corresponding to the third station 23 on each limit member 12. The guide member 13 has a guide surface 131 extending from top to bottom and tilted toward the first lifting mechanism 232, so as to play a guiding role when the first lifting mechanism 232 descends to transfer the workpiece A to be transferred to the placement member 25 located at the third station 23. Such a design is made in view of the fact that the workpiece A to be transferred in this embodiment has a certain length. Once there is an offset, when the first lifting mechanism 232 receives the workpiece A to be transferred from the first manipulator 231 and descends to the conveyor line 2, the end of the workpiece A to be transferred will sometimes interfere with the limit member 12, resulting in the inability to correctly complete the transfer of the workpiece A to be transferred. Therefore, the guide member 13 with the guide surface 131 is provided. When the workpiece A to be transferred descends with the first lifting mechanism 232, if the workpiece A to be transferred is offset, the guide surface 131 can contact the end of the workpiece A to be transferred, and guide the workpiece A to be transferred to a suitable range to avoid interference with the limit member 12. Finally, as Figure 5 As shown, the conveyor line 2 is provided with at least two placement members 25 for placing the workpiece A to be transferred at intervals along the conveying direction. The placement member 25 includes at least two sub-placement members 251 spaced apart along a direction perpendicular to the conveying direction. The sub-placement member 251 is at least partially recessed downward to form a groove 252 for placing the workpiece A to be transferred. The bottom of the groove 252 is provided with an adjustment hole 253 for mounting to the conveyor line 2. The adjustment hole 253 extends along the conveying direction of the conveyor line 2, so that when the workpiece A to be transferred is transferred to the sub-placement member 251, the sub-placement member 251 can be adjusted along the conveying direction of the conveyor line 2 under the resistance of the workpiece A to be transferred. When the workpiece A to be transferred contacts each sub-placement member 251 of the same placement member 25, if the two ends of the workpiece A to be transferred are offset, each sub-placement member 251 will be adjusted along the conveying direction to ensure that the workpiece A to be transferred is correctly placed. The conveying device in this embodiment is also used in a production line. When the third station 23 is used to load materials to the conveyor line 2, the production line includes the following steps:

[0052] Step 1-1, the first manipulator 231 transfers the workpiece A to be transferred to the first lifting mechanism 232;

[0053] Step 1-2, the first lifting mechanism 232 transfers the workpiece A to be transferred to the third station 23;

[0054] Step 1-3, determine whether the workpiece A to be transferred by the first lifting mechanism 232 is a qualified part. If so, it is transported to the first station 21 through the conveyor line 2; if not, it is transported to the second station 22 through the conveyor line 2.

[0055] The specific use process of the conveying device in this embodiment is as follows:

[0056] Regarding the role of the placement member 25, Figure 6 As shown, the two ends of the workpiece A to be transferred are offset and therefore cannot be directly placed in the groove 252 of the sub-placement member 251. However, due to the function of the adjustment hole 253, as shown in FIG. Figure 7 As shown, each sub-placement member 251 is resisted by the workpiece to be transferred and begins to adjust along the conveying direction adaptively. Finally, as shown in Figure 8 As shown, the workpiece A to be transferred smoothly enters the groove 252 of each sub-placing member 251.

[0057] Regarding the working process of the third station 23, see Fig. 9 , at this time, the first lifting mechanism 232 is in the initial state, and the arrow in the figure indicates the subsequent movement direction of the first lifting mechanism 232; Fig.10 As shown, the second driving source 234 drives the second platform 233 of the first lifting mechanism 232 to rise to the lifting state, and the arrow in the figure indicates the subsequent movement direction of the first manipulator 231; Fig.11 As shown, the first manipulator 231 and the workpiece A to be transferred are lowered to dock with the second platform 233, and the workpiece A to be transferred is transferred to the sub-placement member 251 of the second platform 233. The arrow in the figure indicates the subsequent movement direction of the first lifting mechanism 232; finally, as shown in FIG. Fig.12 As shown, the second platform 233 descends and transfers the workpiece A to be transferred to the sub-placement piece 251 of the third station 23; then it is determined whether the workpiece A to be transferred transferred by the first lifting mechanism 232 is a qualified part. If so, it is transported to the first station 21 through the conveyor line 2; if not, it is transported to the second station 22 through the conveyor line 2.

[0058] Example 2

[0059] It is basically the same as Example 1, except that the third station 23 in this embodiment is used to unload materials from the conveyor line 2, the first station 21 is a station mainly used to load materials to the conveyor line 2, and the second station 22 is a spare station for loading materials to the conveyor line 2. Therefore, the production line using the conveying device in this embodiment, when the third station 23 is used to unload materials from the conveyor line 2, includes the following steps:

[0060] Step 2-1, the second manipulator transfers the workpiece A to be transferred to the second lifting mechanism 24;

[0061] Step 2-2, the second lifting mechanism 24 transfers the workpiece A to be transferred to the first workstation 21;

[0062] Step 2-3, conveying the workpiece A to be transferred to the third station 23 via the conveyor line 2;

[0063] Step 2-4, determine whether the second manipulator or the second lifting mechanism 24 fails. If so, load the material to the conveyor line 2 through the second station 22. If not, return to step 2-1.

[0064] The specific use process of the second lifting mechanism 24 in this embodiment is as follows:

[0065] like Fig.13 As shown, the second manipulator places the workpiece A to be transferred above the first station 21, and the second lifting mechanism 24 is in the initial state at this time. The arrow in the figure indicates the subsequent movement direction of the second lifting mechanism 24; Fig.14 As shown, the first driving source 242 drives the first platform 241 to rise, so that the workpiece A to be transferred is transferred to the sub-placement member 251 of the first platform 241. The arrow in the figure indicates the subsequent movement direction of the second lifting mechanism 24; Fig.15 As shown, the first platform 241 in this embodiment can move toward the third station 23 along the conveying direction, so as to align with the sub-placement member 251 on the conveying line 2 below. The arrow in the figure indicates the subsequent movement direction of the second lifting mechanism 24; finally, as shown in FIG. Fig.16 As shown, the first platform 241 descends to connect with the conveyor line 2 , and transfers the workpiece A to be transferred near the third station 23 to the conveyor line 2 .

Claims

1. A conveying device, comprising a frame (1), on which a conveying line (2) for conveying a workpiece (A) to be transferred is arranged, wherein the conveying line (2) comprises a first station (21) located at one end of the frame (1) and a second station (22) located at the other end of the frame (1), characterized in that: Also included are: A third workstation (23), located between the first workstation (21) and the second workstation (22); A first robot (231) for loading or unloading materials onto the conveyor line (2) is provided adjacent to the third station (23), and the third station (23) is provided with a first lifting mechanism (232) corresponding to the first robot (231). The first lifting mechanism (232) can cooperate with the first robot (231) in a lifted state, or cooperate with the conveyor line (2) in a lowered state to transfer the workpiece (A) to be transferred. Correspondingly, the first station (21) and the second station (22) can be selectively used to perform loading or unloading actions opposite to those of the third station (23).

2. The conveying device according to claim 1, characterized in that: The first workstation (21) and / or the second workstation (22) is provided with a second robot for loading or unloading materials. Correspondingly, a second lifting mechanism (24) corresponding to the second robot is also provided adjacent to the second robot. The second lifting mechanism (24) can cooperate with the second robot in a lifted state, or cooperate with the conveyor line (2) in a lowered state to transfer the workpiece (A) to be transferred.

3. The conveying device according to claim 2, characterized in that: The second lifting mechanism (24) is only arranged at the first workstation (21), and the second workstation (22) completes the corresponding loading or unloading action by an operator. The second lifting mechanism (24) includes a first platform (241), and the first platform (241) is provided with a placement piece (25) for placing the workpiece (A) to be transferred. The frame (1) is provided with a first driving source (242) connected to the first platform (241), so as to drive the first platform (241) to move upward to a lifting state or downward to a lowering state.

4. The conveying device according to claim 3, characterized in that: The workpieces (A) to be transferred include qualified parts and unqualified parts. The third station (23) is used to load the workpieces onto the conveyor line (2). Correspondingly, the first station (21) is used to unload the qualified parts, and the second station (22) is used to unload the unqualified parts.

5. The conveying device according to claim 4, characterized in that: The first lifting mechanism (232) comprises a second platform (233), the second platform (233) is provided with the placement member (25), and the frame (1) is provided with a second driving source (234) connected to the second platform (233), so as to drive the second platform (233) to move upward to a lifting state or downward to a descending state.

6. The conveying device according to claim 5, characterized in that: A truss (26) is provided above the third workstation (23), and a conveying mechanism for conveying the workpiece (A) to be transferred is provided on the truss (26). Correspondingly, the first manipulator (231) is located on the truss (26), so as to transfer the workpiece (A) to be transferred on the conveying mechanism to the first lifting mechanism (232).

7. The conveying device according to claim 6, characterized in that: The middle part of the frame (1) has an operating space (11) for setting the conveying line (2), and the conveying line (2) includes a conveying chain (27) located on both sides of the operating space (11) along a direction perpendicular to the conveying direction, and the placing member (25) is provided on the conveying chain (27). Correspondingly, the frame (1) is provided with limiting members (12) on both sides of the operating space (11) along a direction perpendicular to the conveying direction, and the two limiting members (12) extend along the conveying direction and a preset distance (d) is maintained between the two limiting members (12) for placing the workpiece (A) to be transferred.

8. The conveying device according to claim 7, characterized in that: A guide member (13) is also provided at a position corresponding to the third workstation (23) on each of the limit members (12), and the guide member (13) has a guide surface (131) extending from top to bottom and inclined toward the direction close to the first lifting mechanism (232), so as to play a guiding role when the first lifting mechanism (232) descends to transfer the workpiece (A) to be transferred to the placement member (25) located at the third workstation (23).

9. The conveying device according to any one of claims 3 to 8, characterized in that: The conveyor line (2) is provided with at least two placement pieces (25) for placing the workpiece (A) to be transferred at intervals along the conveying direction. The placement piece (25) includes at least two sub-placement pieces (251) arranged at intervals along a direction perpendicular to the conveying direction. The sub-placement piece (251) is at least partially recessed downward to form a groove (252) for placing the workpiece (A) to be transferred. The bottom of the groove (252) is provided with an adjustment hole (253) for mounting to the conveyor line (2). The adjustment hole (253) extends along the conveying direction of the conveyor line (2), so that when the workpiece (A) to be transferred is transferred to the sub-placement piece (251), the sub-placement piece (251) can be adjusted along the conveying direction of the conveyor line (2) under the interference of the workpiece (A) to be transferred.

10. A production line comprising a conveying device for conveying workpieces (A) to be transferred, characterized in that: The conveying device is a conveying device as defined in any one of claims 4 to 9, and the third station (23) of the conveying device can be used to load or unload materials to the conveying line (2); When the third station (23) is used to load materials onto the conveyor line (2), the following steps are included: Step 1-1, the first manipulator (231) transfers the workpiece (A) to be transferred to the first lifting mechanism (232); Step 1-2, the first lifting mechanism (232) transfers the workpiece (A) to be transferred to the third workstation (23); Step 1-3, determining whether the workpiece (A) to be transferred by the first lifting mechanism (232) is a qualified workpiece, and if so, transporting it to the first workstation (21) through the conveyor line (2); if not, transporting it to the second workstation (22) through the conveyor line (2); When the third station (23) is used to unload materials onto the conveyor line (2), the following steps are included: Step 2-1, the second manipulator transfers the workpiece (A) to be transferred to the second lifting mechanism (24); Step 2-2, the second lifting mechanism (24) transfers the workpiece (A) to be transferred to the first workstation (21); Step 2-3, conveying the workpiece (A) to be transferred to the third workstation (23) via the conveying line (2); Step 2-4, determining whether the second manipulator or the second lifting mechanism (24) fails. If so, loading the material onto the conveyor line (2) through the second station (22); if not, returning to step 2-1.

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