Workpiece pile height compensation device

Abstract

The utility model relates to a workpiece pile height compensation device which comprises a plurality of height adjusting mechanisms, and each height adjusting mechanism comprises a supporting bottom frame, a supporting plate, a lifting support and a lead screw transmission assembly. The supporting plate is used for bearing a door ring workpiece and is arranged above the supporting bottom frame. The lifting support is arranged between the supporting bottom frame and the supporting plate and can drive the supporting plate to reciprocate in the vertical direction. The lead screw transmission assembly is arranged below the supporting plate and provided with a lead screw rod and a lead screw nut arranged on the lead screw rod in a sleeving mode, and the lead screw nut is connected with the lifting support. The height adjusting mechanism is arranged to drive the lifting support to move vertically through horizontal movement of the lead screw nut so as to adjust the height of the supporting plate. Each height adjusting mechanism drives the corresponding lifting support to ascend and descend through the lead screw transmission assembly to adjust the height of the corresponding supporting plate, so that the uppermost portions of the door ring workpiece piles on the multiple supporting plates are located on the same horizontal plane, and the clamping jaw suction cups can suck the multiple door ring workpieces at the same time conveniently.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile manufacturing, in particular to a workpiece pile height compensation device. Background Art

[0002] During the automotive door ring assembly process, a suction cup gripper is used to simultaneously pick up multiple door ring workpieces from the unloading platform and move them to the assembly station for assembly. However, due to the varying thickness of each door ring workpiece and the fact that each type of workpiece must be stacked on the unloading platform, the heights of the four door ring workpiece piles vary, preventing the tops of the door ring workpiece piles from being on the same level. Large height differences between the workpiece piles prevent the suction cups on the gripper from simultaneously picking up all the door ring workpieces, hindering the subsequent assembly process. Utility Model Content

[0003] The purpose of the present utility model is to provide a workpiece stack height compensation device, which can be used to set up multiple height adjustment mechanisms for carrying door ring workpiece stacks. Each height adjustment mechanism uses a screw transmission assembly to drive a lifting bracket to lift and adjust the height of each corresponding support plate, thereby adjusting the height of the door ring workpiece stack carried on each support plate, so that the uppermost parts of the multiple door ring workpiece stacks are on the same horizontal plane, which is convenient for the clamping claw suction cup to simultaneously absorb multiple door ring workpieces at one time.

[0004] To achieve the above-mentioned object, the present invention provides a workpiece stack height compensation device, comprising a plurality of height adjustment mechanisms, wherein the height adjustment mechanisms include:

[0005] Support chassis;

[0006] A support plate, used for carrying a door ring workpiece, is arranged above the support base;

[0007] A lifting bracket, disposed between the supporting base and the supporting plate and capable of driving the supporting plate to move back and forth in a vertical direction;

[0008] A lead screw transmission assembly is provided below the support plate and is provided with a lead screw and a lead screw nut sleeved on the lead screw, and the lead screw nut is connected to the lifting bracket;

[0009] The height adjustment mechanism is configured to drive the lifting bracket to move vertically through the horizontal movement of the screw nut to adjust the height of the support plate.

[0010] Optionally, the screw transmission assembly further includes:

[0011] A driving motor is arranged below the support plate;

[0012] A gear box is provided at the driving end of the driving motor, and the lead screw is connected to the gear box;

[0013] A screw support seat, arranged below the support plate and used to support the lead screw;

[0014] A connecting piece is provided on the lead screw nut and is used to be connected to the lifting bracket.

[0015] Optionally, the lifting bracket is a scissor-type lifting bracket.

[0016] Optionally, a pair of lifting brackets are provided between the supporting base and the supporting plate, and the two lifting brackets are respectively located on both sides of the supporting plate.

[0017] Optionally, one side of the lifting bracket is rotatably connected to the supporting base and the supporting plate respectively.

[0018] Optionally, first limiting grooves are correspondingly provided on both sides of the support base, and a first limiting rod is provided on the other side of the lifting bracket, and the first limiting rod is horizontally movably provided in the first limiting groove.

[0019] Optionally, second limiting grooves are correspondingly provided on both sides of the support plate, and a second limiting rod is provided on the other side of the lifting bracket. One end of the second limiting rod is horizontally movably provided in the second limiting groove, and the other end of the second limiting rod passes through the lifting bracket and is rotatably connected to the connecting member.

[0020] Optionally, a plurality of supporting legs are provided below the supporting base.

[0021] The beneficial effect of the present invention is that by setting up multiple height adjustment mechanisms for carrying door ring workpiece stacks, each height adjustment mechanism uses a screw transmission assembly to drive the lifting bracket to lift and adjust the height of the corresponding support plate, and then adjusts the height of the door ring workpiece stack carried on each support plate, so that the top parts of the multiple door ring workpiece stacks are on the same horizontal plane, which is convenient for the clamping claw suction cup to simultaneously absorb multiple door ring workpieces at one time.

[0022] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention and to implement it according to the contents of the specification, the following is a detailed description of the preferred embodiments of the present invention in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic structural diagram of a workpiece pile height compensation device shown in one embodiment of the present utility model;

[0024] Figure 2This is a schematic structural perspective view of a height adjustment mechanism of a workpiece stack height compensation device shown in one embodiment of the present utility model;

[0025] Figure 3 This is a first schematic structural cross-sectional view of a screw transmission assembly of a height adjustment mechanism of a workpiece stack height compensation device shown in one embodiment of the present utility model;

[0026] Figure 4 A second schematic structural cross-sectional view of a screw transmission assembly of a height adjustment mechanism of a workpiece stack height compensation device shown in one embodiment of the present utility model;

[0027] Figure 5 This is a schematic structural side view of a height adjustment mechanism of a workpiece stack height compensation device shown in one embodiment of the present utility model;

[0028] In the figure: 10. Height adjustment mechanism; 1. Support base; 11. First limiting slot; 12. Support foot; 2. Support plate; 21. Second limiting slot; 3. Lifting bracket; 31. First limiting rod; 32. Second limiting rod; 4. Screw transmission assembly; 41. Screw rod; 42. Screw nut; 43. Drive motor; 44. Gear box; 45. Screw support seat; 46. Connecting piece. DETAILED DESCRIPTION

[0029] The following is a clear and complete description of the technical solution of the present invention in conjunction with the accompanying drawings. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present invention.

[0030] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating positions or relationships, are based on the positions or relationships shown in the accompanying drawings and are intended solely to facilitate the description of this utility model and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0031] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be internal communication between two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0032] See Figures 1 to 3 A workpiece stack height compensation device shown in a preferred embodiment of the present application includes a plurality of height adjustment mechanisms 10, and the height adjustment mechanism 10 includes a support base 1, a support plate 2, a lifting bracket 3 and a screw transmission assembly 4. The support plate 2 is used to carry the door ring workpiece and is arranged above the support base 1. The lifting bracket 3 is arranged between the support base 1 and the support plate 2 and can drive the support plate 2 to move back and forth in the vertical direction. The screw transmission assembly 4 is arranged below the support plate 2 and is provided with a screw rod 41 and a screw nut 42 sleeved on the screw rod 41, and the screw nut 42 is connected to the lifting bracket 3. The height adjustment mechanism 10 is configured to drive the lifting bracket 3 to move vertically through the horizontal movement of the screw nut 42 to adjust the height of the support plate 2.

[0033] According to the solution of the embodiment of the present invention, by providing multiple height adjustment mechanisms 10 for supporting door ring workpiece stacks, each height adjustment mechanism 10 uses a screw drive assembly 4 to drive the lifting bracket 3 to lift and lower the height of the corresponding support plate 2, thereby adjusting the height of the door ring workpiece stack supported on each support plate 2, so that the top of the multiple door ring workpiece stacks are on the same horizontal plane, which facilitates the gripper suction cup to simultaneously pick up multiple door ring workpieces at one time. It should be noted that due to the different thicknesses of each door ring workpiece, the height differences between the door ring workpiece stacks of different numbers also vary. Therefore, after the multiple height adjustment mechanisms 10 adjust the height of the corresponding door ring workpiece stacks so that the top group of door ring workpieces are on the same horizontal plane, each time the gripper simultaneously picks up and moves a group of door ring workpieces, a height difference will again occur between the multiple door ring workpiece stacks. This height difference will gradually accumulate with the number of times the gripper picks up workpieces. When the height difference accumulates to a certain value and the gripper suction cup cannot pick up a group of door ring workpieces at the same time, it is necessary to use the height adjustment mechanism 10 to adjust the height of each door ring workpiece stack again.

[0034] The following is a detailed description with specific embodiments:

[0035] See Figure 3 and Figure 4The screw transmission assembly 4 also includes a drive motor 43, a gear box 44, a screw support seat 45 and a connecting piece 46. The drive motor 43 is arranged below the support plate 2. The gear box 44 is arranged at the driving end of the drive motor 43, and the screw 41 is connected to the gear box 44. The screw support seat 45 is arranged below the support plate 2 and is used to support the screw 41. The connecting piece 46 is arranged on the screw nut 42 and is used to connect with the lifting bracket 3. Specifically, in this embodiment, the lifting bracket 3 is a scissor-type lifting bracket. After the drive motor 43 is started, the transmission screw rotates. At this time, since the screw nut 42 cooperates with the connecting piece 46 to connect the lifting bracket 3 with a scissor-type structure, the screw nut 42 is limited and cannot rotate. It can only move horizontally along the axial direction of the screw 41. The horizontal movement of the screw nut 42 drives the lifting bracket 3 to move vertically, thereby adjusting the height of the support plate 2 and the door ring workpiece stack on it.

[0036] See Figure 5 A pair of lifting brackets 3 are provided between the support base 1 and the support plate 2, and the two lifting brackets 3 are respectively located on both sides of the support plate 2. One side of the lifting bracket 3 is rotatably connected to the support base 1 and the support plate 2 respectively. First limiting grooves 11 are correspondingly provided on both sides of the support base 1, and a first limiting rod 31 is provided on the other side of the lifting bracket 3. The first limiting rod 31 is horizontally movable in the first limiting groove 11. Second limiting grooves 21 are correspondingly provided on both sides of the support plate 2, and a second limiting rod 32 is provided on the other side of the lifting bracket 3. One end of the second limiting rod 32 is horizontally movable in the second limiting groove 21, and the other end of the second limiting rod 32 passes through the lifting bracket 3 and is rotatably connected to the connecting member 46. When the screw nut 42 moves horizontally, the second limiting rod 32 will be driven to move horizontally in the second limiting groove 21 through the connecting member 46, and at this time, the scissor-shaped lifting bracket 3 will be driven to move up and down.

[0037] See Figure 5 In this embodiment, a plurality of supporting legs 12 are provided below the supporting base frame 1 .

[0038] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0039] The above-described embodiments merely represent several implementation methods of the present invention. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that a person skilled in the art would be able to make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements fall within the scope of protection of the present invention. Therefore, the scope of protection of the present utility model patent shall be determined by the appended claims.

Claims

1. A workpiece stack height compensation device, characterized in that: It includes multiple height adjustment mechanisms, including: Support chassis; A support plate, used for carrying a door ring workpiece, is arranged above the support base; A lifting bracket, disposed between the supporting base and the supporting plate and capable of driving the supporting plate to move back and forth in a vertical direction; A lead screw transmission assembly is provided below the support plate and is provided with a lead screw and a lead screw nut sleeved on the lead screw, and the lead screw nut is connected to the lifting bracket; The height adjustment mechanism is configured to drive the lifting bracket to move vertically through the horizontal movement of the screw nut to adjust the height of the support plate.

2. The workpiece stack height compensation device according to claim 1, characterized in that: The screw drive assembly further comprises: A driving motor is arranged below the support plate; A gear box is provided at the driving end of the driving motor, and the lead screw is connected to the gear box; A screw support seat, arranged below the support plate and used to support the lead screw; A connecting piece is provided on the lead screw nut and is used to be connected to the lifting bracket.

3. The workpiece stack height compensation device according to claim 2, characterized in that: The lifting bracket is a scissor-type lifting bracket.

4. The workpiece stack height compensation device according to claim 3, characterized in that: A pair of lifting brackets are provided between the supporting base and the supporting plate, and the two lifting brackets are respectively located on both sides of the supporting plate.

5. The workpiece stack height compensation device according to claim 4, characterized in that: One side of the lifting bracket is rotatably connected to the supporting base and the supporting plate respectively.

6. The workpiece stack height compensation device according to claim 5, characterized in that: First limiting grooves are correspondingly provided on both sides of the support base, and a first limiting rod is provided on the other side of the lifting bracket. The first limiting rod is horizontally movably provided in the first limiting groove.

7. The workpiece stack height compensation device according to claim 6, characterized in that: Second limiting grooves are correspondingly opened on both sides of the support plate, and a second limiting rod is provided on the other side of the lifting bracket. One end of the second limiting rod is horizontally movably arranged in the second limiting groove, and the other end of the second limiting rod passes through the lifting bracket and is rotatably connected to the connecting member.

8. The workpiece stack height compensation device according to claim 7, characterized in that: A plurality of supporting legs are arranged below the supporting base frame.

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