Variable distance suction head for metal stamping parts

Abstract

The present invention provides a variable-distance suction head made of metal stamping parts, which can simultaneously transport multiple products at a time, thereby improving transport efficiency. The device comprises: N sets of suction head assemblies, each comprising a suction head mounting plate and a suction head, where N is a natural number greater than 2; a mounting frame, comprising two mounting plates at both ends, two main plates on both sides, and several guide shafts. The two mounting plates are connected by the two main plates to form a frame, with the two main plates arranged facing each other. The facing surfaces of each main plate are provided with a suction head limiting stepped structure along their length. Several of the aforementioned guide shafts are disposed between the two mounting plates; a drive cylinder; and a stepped drive shaft.

Description

Technical Field

[0001] The invention relates to the technical field of material tray structures, in particular to a variable-distance suction head of a metal stamping part. Background Art

[0002] In the automation industry, the spacing between stamped blanking products is different from the spacing between the acupoints on the material tray used for shipment. The existing technology uses a single suction head for transportation. The distance the suction head moves each time is adjusted according to the position of the blanked product and the corresponding acupoints. Due to the large number of acupoints in the material tray, the transportation of a single suction head requires a lot of transportation time. Therefore, it is urgent to develop a suction head assembly to improve the transportation efficiency. Summary of the Invention

[0003] In response to the above problems, the present invention provides a variable-distance suction head for metal stamping parts, which can simultaneously transport multiple products at a time, thereby improving the transportation efficiency.

[0004] A metal stamping variable distance suction head, characterized in that it includes:

[0005] N sets of suction tip assemblies, comprising a suction tip mounting plate and a suction tip, where N is a natural number greater than 2;

[0006] The mounting frame includes mounting plates at both ends, main boards on both sides, and several guide shafts. The mounting plates at both ends are connected by the main boards on both sides to form a frame. The main boards on both sides are arranged facing each other. The facing surfaces of the main boards on each side are provided with a suction head limiting step structure along the length direction. Several guide shafts are provided between the mounting plates at both ends.

[0007] driving cylinder;

[0008] and stepped drive shafts;

[0009] A driving cylinder is fixedly connected to a mounting plate at one end thereof, and an output end of the driving cylinder passes through the corresponding mounting plate and is connected to the stepped driving shaft. The stepped driving shaft is provided with a plurality of transmission shaft bodies with gradually tapering ends from the end close to the driving cylinder to the end away from the driving cylinder;

[0010] The suction heads corresponding to the plurality of suction head assemblies are arranged in sequence along the axial direction of the stepped drive shaft, and the suction head mounting plates are arranged in sequence along the axial direction of the stepped drive shaft. Corresponding guide shaft holes are arranged on each suction head mounting plate, and corresponding guide shafts pass through the guide shaft holes. Each suction head mounting plate is also provided with a drive guide hole. The upper width of each suction head mounting plate is different. The upper positioning width of the suction head mounting plate gradually decreases from the end close to the drive cylinder to the end away from the drive cylinder. The upper positioning edges of all suction head mounting plates are arranged in a stepped manner.

[0011] The suction head limiting step structure includes a first limiting step closest to the driving cylinder end, and a second limiting step, a third limiting step, ..., and an Nth limiting step arranged in sequence. The end surfaces of all steps except the first limiting step close to the large-diameter limiting step are open end surfaces;

[0012] The relative external driving end of the stepped drive shaft is fastened to the suction head mounting plate of the suction head assembly at the end. When the driving cylinder is in the open state, the shoulder of the adjacent transmission shaft body of the stepped drive shaft is used to drive the suction head assembly to expand the spacing, and the step stop vertical surface between the limit steps is synchronously ensured to ensure that the distance between the suction heads reaches the acupuncture point spacing of the material tray;

[0013] When the driving cylinder is in the retracted state, the outermost suction head mounting plate drives all suction head mounting plates to be arranged closely together to achieve the blanking spacing.

[0014] It is further characterized by:

[0015] The output end of the driving cylinder is provided with an external thread structure, the input end of the stepped driving shaft is provided with a center hole, and the center hole of the stepped driving shaft is threadedly fixed to the external thread structure;

[0016] The output end of the driving cylinder is also provided with a double nut adjustment structure, which adjusts the installation axial distance between the stepped driving shaft and the output end to ensure that the subsequent adjustment distance of the suction head is stable and reliable;

[0017] The value of N is 4; the first suction head assembly, the second suction head assembly, the third suction head assembly, and the fourth suction head assembly are arranged in sequence from the axial position close to the driving cylinder end to the axial position away from the driving cylinder, the first suction head assembly includes a first suction head mounting plate and a first suction head, the second suction head assembly includes a second suction head mounting plate and a second suction head, the third suction head assembly includes a third suction head mounting plate and a third suction head, and the fourth suction head assembly includes a fourth suction head mounting plate and a fourth suction head. The stepped drive shaft is provided with a first transmission shaft body, a second transmission shaft body, and a third transmission shaft body from the end close to the driving cylinder end to the end away from the driving cylinder end. The connection position of the first transmission shaft body and the second transmission shaft body forms a first shaft shoulder, and the connection position of the second transmission shaft body and the third transmission shaft body forms a second shaft shoulder. The suction head limiting step structure includes a first limiting step closest to the driving cylinder end, and a second limiting step, a third limiting step, and a fourth limiting step arranged in sequence;

[0018] A pair of suction heads are provided at the bottom of each suction head assembly to ensure stable and reliable adsorption of the product;

[0019] The axial length of the first transmission shaft is smaller than the axial length of the second transmission shaft, and the axial length of the second transmission shaft is smaller than the axial length of the third transmission shaft;

[0020] All suction heads are located at the bottom of the mounting frame and arranged on the same plane;

[0021] An air joint is provided on one side of the middle portion in the height direction of each suction head mounting plate, and an external air circuit is connected through the air joint to drive the suction head to perform adsorption or not;

[0022] The driving cylinder includes two air chambers, each of which is connected to an external air circuit joint. Compressed air is applied to the corresponding air chamber to perform the extension and retraction of the cylinder.

[0023] There are three guide shafts, which are arranged in an equilateral triangle, with two located at the upper part and one located at the lower part, to ensure that the translation of the suction head assembly is stable and reliable.

[0024] After adopting the above technical solution, the variable-distance suction head is suitable for hardware steel strips that pass through mold stamping. The product falls on the mold, and then the four-axis robot with the variable-distance suction head sucks up the product that falls on the mold and places it on the shipping tray. The number of products to be picked up at a time is N, N>2. Multiple products can be transported simultaneously at a time, which improves the transportation efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a schematic diagram of the three-dimensional structure of the present invention (when the distance between the suction heads is 15 mm);

[0026] Figure 2 This is a schematic diagram of the main structure of the present invention;

[0027] Figure 3 for Figure 2 AA cross-sectional structure diagram;

[0028] Figure 4 for Figure 2 Schematic diagram of the BB cross-sectional structure;

[0029] The names corresponding to the serial numbers in the figure are as follows:

[0030] Guide shaft hole 1, drive guide hole 2, upper positioning edge 3, air joint 4, air line joint 5;

[0031] Mounting frame 10, end mounting plate 11, side main board 12, first limiting step 121, second limiting step 122, third limiting step 123, fourth limiting step 124, guide shaft 13, drive cylinder 20, external thread structure 21, stepped drive shaft 30, first transmission shaft body 31, second transmission shaft body 32, third transmission shaft body 33, first shoulder 34, second shoulder 35, double nut adjustment structure 40, first suction head assembly 50, first suction head mounting plate 51, first suction head 52, second suction head assembly 60, second suction head mounting plate 61, second suction head 62, third suction head assembly 70, third suction head mounting plate 71, third suction head 72, fourth suction head assembly 80, fourth suction head mounting plate 81, fourth suction head 82, fastening bolt 90. DETAILED DESCRIPTION

[0032] Metal stamping parts variable distance suction head, see Figures 1-4 , which includes N groups of suction head assemblies, a mounting frame 10, a driving cylinder 20, and a stepped driving shaft 30;

[0033] N sets of suction head assemblies include a suction head mounting plate and a suction head, and in a specific implementation, the value of N is 4;

[0034] The mounting frame 10 includes mounting plates 11 at both ends, main boards 12 at both sides, and several guide shafts 13. The mounting plates 11 at both ends are connected by the main boards 12 at both sides to form a frame. The main boards 12 on both sides are arranged facing each other. The facing surfaces of each main board are provided with a nozzle limit step structure along the length direction. Several guide shafts 13 are provided between the mounting plates 11 at both ends. In specific implementation, the number of guide shafts 13 is three, and the three guide shafts 13 are arranged in an equilateral triangle, with two located at the upper part and one located at the lower part, to ensure stable and reliable translation of the nozzle assembly.

[0035] A driving cylinder is fixed to the mounting plate at one end, and the output end of the driving cylinder passes through the corresponding mounting plate 11 and is connected to the stepped driving shaft 30. The stepped driving shaft 30 is provided with a plurality of transmission shaft bodies with gradually tapering ends from the end close to the driving cylinder to the end away from the driving cylinder.

[0036] The suction heads corresponding to the four groups of suction head assemblies are arranged in sequence along the axial direction of the stepped drive shaft 30, and the suction head mounting plates are arranged in sequence along the axial direction of the stepped drive shaft 30. Corresponding guide shaft holes 1 are arranged on each group of suction head mounting plates, and corresponding guide shafts 13 pass through the guide shaft holes 1. Each group of suction head mounting plates is also provided with a drive guide hole 2. The upper width of each group of suction head mounting plates is different. The upper positioning width of the suction head mounting plates gradually decreases from the end close to the drive cylinder to the end away from the drive cylinder. The upper positioning edges 3 of all suction head mounting plates are arranged in a stepped manner.

[0037] The suction head limiting step structure includes a first limiting step 121 closest to the driving cylinder end, and a second limiting step 122, a third limiting step 123, and a fourth limiting step 124 arranged in sequence. The end surfaces of all steps except the first limiting step, which are close to the large-diameter limiting step, are open. The first limiting step 121 is used to securely mount the first suction head mounting plate of the first suction head assembly.

[0038] The relative external driving end of the stepped drive shaft 30 is fastened to the suction head assembly of the suction head mounting plate at the end. When the driving cylinder is in the open state, the shoulder of the adjacent transmission shaft body of the stepped drive shaft 30 is used to drive the suction head assembly to expand the spacing, and the step stop vertical surface between the limit steps is synchronized to ensure that the distance between the suction heads reaches the acupuncture point spacing of the material tray;

[0039] When the driving cylinder 20 is in the retracted state, the outermost suction head mounting plate drives all suction head mounting plates to be closely arranged to achieve the blanking spacing.

[0040] In specific implementation: the output end of the driving cylinder 20 is provided with an external thread structure 21, and the input end of the stepped driving shaft 30 is provided with a center hole, and the center hole of the stepped driving shaft 30 is threadedly fixed to the external thread structure 21; the output end of the driving cylinder 20 is also provided with a double nut adjustment structure 40, which adjusts the installation axial distance between the stepped driving shaft 30 and the output end, ensuring that the subsequent adjustment distance of the suction head is stable and reliable;

[0041] A first suction head assembly 50, a second suction head assembly 60, a third suction head assembly 70, and a fourth suction head assembly 80 are arranged in sequence axially from the end close to the driving cylinder to the end away from the driving cylinder. The first suction head assembly 50 includes a first suction head mounting plate 51 and a first suction head 52. The second suction head assembly 60 includes a second suction head mounting plate 61 and a second suction head 62. The third suction head assembly 70 includes a third suction head mounting plate 71 and a third suction head 72. The fourth suction head assembly 80 includes a fourth suction head mounting plate 81 and a fourth suction head 82. The stepped driving shaft 30 is provided with a first transmission shaft body 31, a second transmission shaft body 32, and a third transmission shaft body 33 from the end close to the driving cylinder 20 to the end away from the driving cylinder 20. The connecting position of the first transmission shaft body 31 and the second transmission shaft body 32 forms a first shaft shoulder 34, and the connecting position of the second transmission shaft body 32 and the third transmission shaft body 33 forms a second shaft shoulder 35.

[0042] The drive guide hole on the first suction head mounting plate 51 ensures the smooth passage of the stepped drive shaft 30. When the spacing is opened, the drive guide hole on the second suction head mounting plate 61 is driven by the first shaft shoulder 34, so that the second suction head 62 reaches the appropriate position. The drive guide hole on the third suction head mounting plate 71 is driven by the second shaft shoulder 35, so that the third suction head 63 reaches the appropriate position. The drive guide hole of the fourth suction head mounting plate 81 is provided with a countersunk hole. The fourth suction head mounting plate 81 is fixed to the end of the third transmission shaft body 33 by a fastening bolt 90. The outer diameter of the first transmission shaft body 31 is larger than that of the second transmission shaft body 32, and the outer diameter of the second transmission shaft body 32 is larger than that of the third transmission shaft body 33.

[0043] Each suction head assembly is provided with a pair of suction heads arranged on both sides at the bottom, which ensures stable and reliable adsorption of the product;

[0044] The axial length of the first transmission shaft 31 is smaller than the axial length of the second transmission shaft 32 , and the axial length of the second transmission shaft 32 is smaller than the axial length of the third transmission shaft 33 ;

[0045] All suction heads are located at the bottom of the mounting frame 10 and arranged on the same plane;

[0046] An air connector 4 is provided on one side of the middle portion in the height direction of each suction head mounting plate, and an external air circuit is connected through the air connector 4 to drive the suction head to perform or not perform the suction operation;

[0047] The driving cylinder 20 includes two air chambers, which are respectively connected to the air circuit connector 5. Compressed air is applied to the corresponding air chambers to perform the extension and retraction of the driving cylinder 20.

[0048] Its working principle is as follows: when the product is sucked from the stamping die, the driving cylinder is in a clamping state, and the product suction head spacing is fixed at 8.5mm; when the product spacing is sucked, during the movement of the four-axis robot, the cylinder opens to drive the stepped drive shaft plus the suction head limit step to increase each product to 15mm, and then put it into the hole of the material tray to complete the loading, and then the cylinder retracts, and the farthest suction head mounting plate is retreated to drive all suction head mounting plates to reset, and then drive all suction heads to be fixed at 8.5mm. The telescopic distance of the driving cylinder is a fixed value, and then the transmission shaft of the stepped drive shaft is reasonably set to the length to complete the position switching between the two distances between the suction heads.

[0049] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the invention can be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be included therein. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

[0050] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. The variable distance suction head of metal stamping parts is characterized by: It includes: N sets of suction tip assemblies, comprising a suction tip mounting plate and a suction tip, where N is a natural number greater than 2; The mounting frame includes mounting plates at both ends, main boards on both sides, and several guide shafts. The mounting plates at both ends are connected by the main boards on both sides to form a frame. The main boards on both sides are arranged facing each other. The facing surfaces of the main boards on each side are provided with a suction head limiting step structure along the length direction. Several guide shafts are provided between the mounting plates at both ends. driving cylinder; and stepped drive shafts; A driving cylinder is fixedly connected to a mounting plate at one end thereof, and an output end of the driving cylinder passes through the corresponding mounting plate and is connected to the stepped driving shaft. The stepped driving shaft is provided with a plurality of transmission shaft bodies with gradually tapering ends from the end close to the driving cylinder to the end away from the driving cylinder; The suction heads corresponding to the plurality of suction head assemblies are arranged in sequence along the axial direction of the stepped drive shaft, and the suction head mounting plates are arranged in sequence along the axial direction of the stepped drive shaft. Corresponding guide shaft holes are arranged on each suction head mounting plate, and corresponding guide shafts pass through the guide shaft holes. Each suction head mounting plate is also provided with a drive guide hole. The upper width of each suction head mounting plate is different. The upper positioning width of the suction head mounting plate gradually decreases from the end close to the drive cylinder to the end away from the drive cylinder. The upper positioning edges of all suction head mounting plates are arranged in a stepped manner. The suction head limiting step structure includes a first limiting step closest to the driving cylinder end, and a second limiting step, a third limiting step, ..., and an Nth limiting step arranged in sequence. The end surfaces of all steps except the first limiting step close to the large-diameter limiting step are open end surfaces; The relative external driving end of the stepped drive shaft is fastened to the suction head mounting plate of the suction head assembly at the end. When the driving cylinder is in the open state, the shoulder of the adjacent transmission shaft body of the stepped drive shaft is used to drive the suction head assembly to expand the spacing, and the step stop vertical surface between the limit steps is synchronously ensured to ensure that the distance between the suction heads reaches the acupuncture point spacing of the material tray; When the driving cylinder is in the retracted state, the outermost suction head mounting plate drives all suction head mounting plates to be arranged closely together to achieve the blanking spacing; The output end of the driving cylinder is provided with an external thread structure, the input end of the stepped drive shaft is provided with a center hole, the center hole of the stepped drive shaft is threadedly fixed to the external thread structure; A pair of suction heads is provided at the bottom of each suction head assembly.

2. The variable distance suction nozzle for metal stamping parts according to claim 1, characterized in that: The output end of the driving cylinder is further provided with a double-nut adjustment structure, which adjusts the installation axial distance between the stepped driving shaft and the output end.

3. The variable distance suction nozzle for metal stamping parts according to claim 1, characterized in that: The value of N is 4; the first suction head assembly, the second suction head assembly, the third suction head assembly, and the fourth suction head assembly are arranged in sequence from the axial position close to the driving cylinder end to the axial position away from the driving cylinder, the first suction head assembly includes a first suction head mounting plate and a first suction head, the second suction head assembly includes a second suction head mounting plate and a second suction head, the third suction head assembly includes a third suction head mounting plate and a third suction head, and the fourth suction head assembly includes a fourth suction head mounting plate and a fourth suction head. The stepped drive shaft is provided with a first transmission shaft body, a second transmission shaft body, and a third transmission shaft body from the end close to the driving cylinder end to the end away from the driving cylinder end. The connection position of the first transmission shaft body and the second transmission shaft body forms a first shaft shoulder, and the connection position of the second transmission shaft body and the third transmission shaft body forms a second shaft shoulder. The suction head limiting step structure includes a first limiting step closest to the driving cylinder end, and a second limiting step, a third limiting step, and a fourth limiting step arranged in sequence.

4. The variable distance suction nozzle for metal stamping parts according to claim 3, characterized in that: The axial length of the first transmission shaft is smaller than the axial length of the second transmission shaft, and the axial length of the second transmission shaft is smaller than the axial length of the third transmission shaft.

5. The variable distance suction nozzle for metal stamping parts according to claim 1, characterized in that: All suction heads are located at the lower part of the mounting frame and arranged on the same plane.

6. The variable distance suction nozzle for metal stamping parts according to claim 1, characterized in that: An air joint is provided on one side of the middle portion in the height direction of each suction head mounting plate, and an external air circuit is connected through the air joint.

7. The variable distance suction nozzle for metal stamping parts according to claim 1, characterized in that: The driving cylinder includes two air chambers, which are respectively connected to air circuit joints. Compressed air is applied to the corresponding air chambers to perform the expansion and contraction of the cylinder.

8. The variable distance suction nozzle for metal stamping parts according to claim 1, characterized in that: The number of the guide shafts is three, and the three guide shafts are arranged in an equilateral triangle, with two being located at the upper part and one being located at the lower part.

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