Precision positioning feeding mechanism

Abstract

The utility model discloses a feeding mechanism with a precise positioning function. The feeding mechanism comprises at least one lifting feeding assembly, at least one precise positioning assembly and a material taking assembly for carrying workpieces. The lifting feeding assembly corresponds to the fine positioning assembly in position, the lifting feeding assembly comprises a lifting driving part, the lifting driving part can drive workpieces placed on the workpiece placing carrier plate to move and be fed, and the fine positioning assembly comprises a limiting part and a pushing driving assembly. The material pushing driving assembly can push and press the workpiece on the limiting piece, and the limiting piece is provided with a butt joint structure matched with the positioning structure on the material taking assembly. According to the utility model, automatic feeding and accurate positioning of workpieces are realized, and the precision of subsequent injection-molded products is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of feeding mechanisms, in particular to a precisely positioned feeding mechanism. Background Art

[0002] Injection molding is an effective way to mass-produce various products. Its process has a long history and is becoming more efficient, environmentally friendly and high-quality. Injection molding is a preferred process that can meet the processing and production of various types of products. Compared with traditional cutting and punching and milling operations, it has the significant advantages of one-time molding and large-scale production.

[0003] Before each mold closing and injection molding of the injection molding machine, the workpiece needs to be accurately placed in the mold core or molding cavity, and then injected into the desired product. In order to ensure the accuracy of the injection molded product, a precision positioning feeding mechanism needs to be designed to solve the above problem. Utility Model Content

[0004] In order to overcome the above shortcomings, the purpose of the utility model is to provide a feeding mechanism with precise positioning, so as to realize automatic loading and precise positioning of workpieces and ensure the accuracy of subsequent injection molding products.

[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is: a precision positioning feeding mechanism, including at least one group of lifting and feeding components, at least one group of fine positioning components and a picking component for transporting workpieces; the lifting and feeding components correspond to the positions of the fine positioning components, the lifting and feeding components include a lifting drive component, the lifting drive component can drive the workpiece placed on the workpiece placement carrier to move and load, the fine positioning component includes a limit member and a pushing drive component, the pushing drive component can push the workpiece onto the limit member, and the limit member is provided with a docking structure matching the positioning structure on the picking component.

[0006] The lifting drive can drive the workpieces stacked from bottom to top on the workpiece placement carrier to move upward, and the mechanical gripper can transport the workpieces to the precision positioning component to realize automatic loading, and each time the material is taken, the workpiece at the top of the workpiece placement carrier is sucked.

[0007] After the push drive assembly completely presses the workpiece against the limiter, the position between the workpiece and the docking structure is relatively fixed. The shape and size of the limiter are the same as the core of the mold when the workpiece is injected. When the workpiece is transferred to the injection molding station, the positioning structure on the mechanical gripper first cooperates with the docking structure, and then moves downward to absorb the workpiece. After the workpiece is moved to the top of the mold core, the positioning is first inserted into the docking structure on the mold core, and then moves downward to place the absorbed workpiece on the mold core, thereby achieving precise positioning.

[0008] Furthermore, the lifting drive member includes a vertically arranged driving motor, a driving mounting bracket and a lifting screw connected to its driving end, the lifting screw passes through a screw connecting plate and is connected to it through a bearing, and a guide lifting shaft parallel to the lifting screw is respectively arranged on both sides of the screw connecting plate, and the workpiece placement carrier is located at the top of the guide lifting shaft. The driving end of the driving motor is connected to the lifting screw through a coupling. In some embodiments, the lifting feeding assembly and the fine positioning assembly are respectively connected to the workbench through a mounting plate and a positioning bracket, wherein the guide lifting shaft passes through the mounting plate and is connected to it through a bushing, the mounting plate is fixed on the workbench, and the driving mounting bracket is arranged on the lower surface of the workbench.

[0009] The driving motor drives the lifting screw to rotate, so that the guide lifting shaft can move up and down, thereby driving the workpiece placement carrier to move up and down.

[0010] Furthermore, the position-limiting member includes a positioning plate and a positioning groove provided on the positioning plate, the positioning groove includes a groove edge 1 and a groove edge 2, and the push drive assembly presses the adjacent two sides of the workpiece onto the groove edge 1 and the groove edge 2 respectively. The positioning groove is used to place the workpiece, and the workpiece can be more stably positioned on the positioning plate by the abutment between the side edges of the workpiece and the two sides of the positioning groove. One end of the groove edge 1 is connected to one end of the groove edge 2 by a rounded corner.

[0011] Furthermore, the positioning plate is arranged in a T-shape, and the positioning groove is symmetrically arranged along the center line of the length direction of the positioning plate. The positioning plate and the push drive assembly are both arranged on the positioning bracket, and the precision positioning efficiency of the workpiece is improved by the two symmetrically arranged positioning grooves. A clearance groove is provided on the positioning bracket at the position corresponding to the rolling assembly.

[0012] Furthermore, the docking structure is a plurality of docking sockets arranged on the limit piece, the positioning structure is a plurality of positioning pins corresponding to the positions of the docking sockets and matching in size, the material picking component is a mechanical gripper, and a plurality of vacuum suction cups are arranged on the lower surface of the mechanical gripper, and the positioning pins are located on the sides of the vacuum suction cups.

[0013] Furthermore, it also includes a detachable lifting sensing component corresponding to the position of the lifting feeding component, and the lifting sensing component is a sensor. The sensor can be a distance sensor or two corresponding sensors that can send and receive respectively. When working, the lifting drive can ensure that the upper surface of the top workpiece on the workpiece carrier is always level with the lifting sensing component, so as to ensure that it can be sensed, so that the subsequent material picking position is accurate.

[0014] Furthermore, the push drive assembly includes a push drive member 1 and a push drive member 2, wherein the push drive member 1 and the push drive member 2 are perpendicular to the pushing direction in the same plane, and a rolling assembly is horizontally arranged at the driving end of the push drive member 2. The workpiece is pushed against the limit member from two directions to make its positioning more stable. The push drive member 1 and the push drive member 2 can be cylinders, screws or other driving mechanisms that can push the workpiece forward.

[0015] Furthermore, the rolling assembly includes a horizontally arranged rolling support and a plurality of rollers arranged in parallel along the length direction thereof. When working, the workpiece is horizontally placed on the limiter, the push drive member 2 works first, the roller contacts one side of the workpiece, and under the action of the push drive member 2, the workpiece is pushed to be pressed against the groove side 2 on the limiter, and then the push drive member 1 works to push the side of the workpiece adjacent to the above side to move, and at this time, with the assistance of the roller, the workpiece can be pushed and pressed against the limiter without hindrance.

[0016] Furthermore, it also includes a plurality of limit frames arranged around the workpiece placement carrier, and a clearance plate is arranged on the top of the limit frame in a direction away from the workpiece placement carrier. The limit frames are arranged to prevent the stacked workpieces from tipping over due to too many of them, and at the same time, the positions of each layer of workpieces can be limited to prevent the workpieces from being stacked too much and becoming messy. The arrangement of the clearance plate can effectively prevent interference with the top workpiece when it is subsequently taken out.

[0017] Furthermore, a bearing plate is provided in the positioning groove, and the bearing plate is a Teflon plate. When the bearing plate is provided, the workpiece is placed on the bearing plate in the positioning groove, and the provision of the Teflon plate can ensure that the surface of the workpiece will not be worn when the workpiece moves thereon, and when the workpiece is glass, the Teflon plate can effectively prevent the glass surface from being scratched.

[0018] Beneficial effects of the utility model:

[0019] In the utility model, the lifting and feeding component, the precision positioning component, the material picking component, the docking structure and the positioning structure cooperate with each other. The material picking component can automatically transport the workpiece on the lifting and feeding component to the precision positioning component, and after the workpiece is positioned by the precision positioning component, it is transported to the injection molding process for injection molding. The docking structure is matched with the positioning structure, so that the suction component can grasp the position on the workpiece more accurately, thereby ensuring the position accuracy when it is subsequently placed on the mold. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is an isometric view of the overall structure of an embodiment of the utility model;

[0021] Figure 2This is an isometric view of the overall structure of the lifting and feeding assembly of an embodiment of the utility model;

[0022] Figure 3 It is a partial structural schematic diagram of an embodiment of the utility model;

[0023] Figure 4 This is an isometric view of the overall structure of the precision positioning assembly of one embodiment of the utility model;

[0024] Figure 5 This is a schematic diagram of the structure of a material taking mechanism according to an embodiment of the utility model;

[0025] In the figure: 1. workbench; 2. lifting and feeding assembly; 21. lifting drive; 211. drive mounting bracket; 212. driving motor; 213. coupling; 214. lifting screw; 215. screw connecting plate; 216. guide lifting shaft; 217. bushing; 22. workpiece placement carrier; 3. lifting induction assembly; 4. limit frame; 5. precision positioning assembly; 51. positioning plate; 52. positioning groove; 521. groove edge one; 522. groove edge two; 53. push drive one; 54. push drive two; 55. rolling assembly; 551. roller; 552. rolling support; 56. clearance groove; 6. docking jack; 7. safety grating; 8. mechanical gripper; 9. positioning pin; 10. vacuum suction cup. DETAILED DESCRIPTION

[0026] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the protection scope of the present invention.

[0027] See attached Figures 1 to 5 As shown, a precision positioning feeding mechanism in this embodiment includes at least one group of lifting and feeding components 2, at least one group of fine positioning components 5 and a picking component for transporting workpieces; the lifting and feeding components 2 correspond to the positions of the fine positioning components 5, the lifting and feeding components 2 include a lifting drive component 21, the lifting drive component 21 can drive the workpiece placed on the workpiece placement carrier 22 to move and load, the fine positioning component 5 includes a limit member and a pushing drive component, the pushing drive component can push the workpiece onto the limit member, and the limit member is provided with a docking structure matching the positioning structure on the picking component.

[0028] The material picking component is a mechanical gripper 8 with a vacuum suction cup 10, and the vacuum suction cup 10 can be an accordion suction cup. The combination of the vacuum suction cup 10 and the mechanical gripper 8 is a common prior art, and its structure is not described in detail here.

[0029] The lifting drive 21 can drive the workpieces stacked from bottom to top on the workpiece placement carrier 22 to move upward, and the mechanical gripper 8 can transport the workpieces to the fine positioning component 5 to realize automatic loading, and each time the material is taken, the workpiece at the top of the workpiece placement carrier 22 is sucked.

[0030] After the push drive assembly completely presses the workpiece against the limiter, the position between the workpiece and the docking structure is relatively fixed. The shape and size of the limiter are the same as the core of the mold when the workpiece is injected. When the workpiece is transferred to the injection molding station, the positioning structure on the mechanical gripper 8 first cooperates with the docking structure, and then moves downward to absorb the workpiece. After the workpiece is moved to the top of the mold core, the positioning is first inserted into the docking structure on the mold core, and then moves downward to place the absorbed workpiece on the mold core, thereby achieving precise positioning.

[0031] The lifting drive member 21 includes a vertically arranged driving motor 212, a driving mounting bracket 211, and a lifting screw 214 connected to the driving end thereof, wherein the lifting screw 214 penetrates the screw connecting plate 215 and is connected to the lifting screw 214 through a bearing, and a guide lifting shaft 216 parallel to the lifting screw 214 is respectively arranged on both sides of the screw connecting plate 215, and the workpiece placement carrier 22 is located at the top of the guide lifting shaft 216. The driving end of the driving motor 212 is connected to the lifting screw 214 through a coupling 213. In some embodiments, the lifting feeding assembly 2 and the fine positioning assembly 5 are respectively connected to the workbench 1 through a mounting plate and a positioning bracket, wherein the guide lifting shaft 216 penetrates the mounting plate and is connected to the mounting plate through a sleeve 217, the mounting plate is fixed on the workbench 1, and the driving mounting bracket 211 is arranged on the lower surface of the workbench 1.

[0032] The driving motor 212 drives the lifting screw 214 to rotate, so that the guide lifting shaft 216 can move up and down, thereby driving the workpiece placement carrier 22 to move up and down.

[0033] In some embodiments, the precision positioning assembly 5 is connected to the upper surface of the workbench 1 through a positioning bracket, so that the precision positioning assembly 5 is adapted to the height of the lifting and feeding assembly 2, thereby facilitating the movement of the workpiece on the lifting and feeding assembly 2 to the precision positioning assembly 5. A safety grating 7 is also provided on one side of the workbench 1 close to the lifting and feeding assembly 2.

[0034] In some embodiments, the drive motor 212 is not limited to drive motor 212, and may also be a vertically arranged telescopic cylinder or linear module. The telescopic cylinder piston rod can push the workpiece placement carrier 22 to move up and down, so as to adjust the position of the workpiece thereon in the vertical direction. The linear module can also drive the workpiece placement carrier 22 to move up and down. It should be noted that the above-mentioned driving methods are included but not limited to, and any known structure that can realize the upward movement of the workpiece is acceptable.

[0035] The position-limiting member includes a positioning plate 51 and a positioning groove 52 provided on the positioning plate 51. The positioning groove 52 includes a groove edge 1 521 and a groove edge 2 522. The push drive assembly presses the adjacent two sides of the workpiece against the groove edge 1 521 and the groove edge 2 522. The positioning groove 52 is used to place the workpiece. The workpiece can be more stably positioned on the positioning plate 51 by the abutment between the side edges of the workpiece and the two sides of the positioning groove 52. One end of the groove edge 1 521 is connected to one end of the groove edge 2 522 by a rounded corner.

[0036] The positioning plate 51 is arranged in a T-shape, and the positioning grooves 52 are arranged symmetrically along the center line of the length direction of the positioning plate 51. The positioning plate 51 and the push drive assembly are both arranged on the positioning bracket, and the precision positioning efficiency of the workpiece is improved by the two symmetrically arranged positioning grooves 52. A clearance groove 56 is provided on the positioning bracket at a position corresponding to the rolling assembly 55.

[0037] In other embodiments, the positioning grooves 52 may also be arranged in an array along the length direction of the positioning plate 51, as long as the workpiece can be placed without interfering with the arrangement of the push drive assembly, which can effectively improve the efficiency of precise positioning, thereby improving the processing efficiency of the workpiece.

[0038] The docking structure is a plurality of docking sockets 6 arranged on the limit piece, the positioning structure is a plurality of positioning pins 9 corresponding to the positions of the docking sockets 6 and matching in size, the material picking component is a mechanical gripper 8, and a plurality of vacuum suction cups 10 are arranged on the lower surface of the mechanical gripper 8, and the positioning pins 9 are located on the sides of the vacuum suction cups 10.

[0039] In some embodiments, two docking holes 6 and two positioning pins 9 are respectively provided. After the workpiece is pushed tightly onto the limit member, the relative position of the workpiece and the docking hole 6 on the limit member is fixed. When taking materials, the positioning pin 9 on the mechanical gripper 8 is inserted into the docking hole 6 and then moves downward to the suction cup to suck the workpiece. Since the limit member and the mold core structure of the mold are the same, when the mechanical gripper 8 places the workpiece corresponding to the docking hole 6 thereon, the position of the workpiece in the mold core is also accurately positioned, effectively ensuring the efficiency of subsequent processing of the workpiece.

[0040] It also includes a detachable lifting sensing component 3 corresponding to the position of the lifting feeding component 2, and the lifting sensing component 3 is a sensor. The sensor can be a distance sensor or two corresponding sensors that can send and receive respectively. When working, the lifting drive 21 can ensure that the upper surface of the top workpiece on the workpiece placement carrier 22 is always level with the lifting sensing component 3, so as to ensure that it can be sensed, so that the subsequent material picking position is accurate.

[0041] It should be noted that the lifting sensing component 3 can be directly screwed to the top of the above-mentioned limiting frame 4, and can also be supported and set by other supporting members.

[0042] The push drive assembly includes a push drive member 1 53 and a push drive member 2 54. The push drive member 1 53 and the push drive member 2 54 are perpendicular to the pushing direction in the same plane. A rolling assembly 55 is horizontally arranged at the driving end of the push drive member 2 54. The workpiece is pushed against the limiter from two directions to make its positioning more stable. The push drive member 1 53 and the push drive member 2 54 can be cylinders, screws or other driving mechanisms that can push the workpiece forward.

[0043] The rolling assembly 55 includes a horizontally arranged rolling support 552 and a plurality of rollers 551 arranged in parallel along its length direction. When working, the workpiece is placed horizontally on the limiter, the push drive member 2 54 works first, the roller 551 contacts one side of the workpiece, and under the action of the push drive member 2 54, the workpiece is pushed to be pressed against the groove side 2 522 on the limiter, and then the push drive member 1 53 works to push the side of the workpiece adjacent to the above side to move, and at this time, with the assistance of the roller 551, the workpiece can be pushed and pressed against the limiter without hindrance.

[0044] It also includes a plurality of limit racks 4 arranged around the workpiece placement carrier 22, and a clearance plate is arranged on the top of the limit rack 4 in a direction away from the workpiece placement carrier 22. The limit rack 4 is arranged to prevent the stacked workpieces from tipping over due to too many of them, and at the same time, the position of each layer of workpieces can be limited to prevent the workpieces from being stacked too much and cluttered. The arrangement of the clearance plate can effectively prevent interference with the top workpiece when it is subsequently taken out.

[0045] In some embodiments, four limiting frames 4 are vertically arranged around the workpiece placement carrier 22, and their cross-sections are L-shaped, which can limit the four corners of the square workpiece.

[0046] It should be noted that the shape and number of the limit frame 4 can be changed according to the shape of the workpiece, as long as it can limit and protect the stacked workpiece. When the workpiece is glass, the setting of the limit frame 4 can also ensure that the glass will not slide out of the workpiece placement carrier 22, avoiding its breaking and causing cost losses to the enterprise.

[0047] A bearing plate is provided in the positioning groove 52, and the bearing plate is a Teflon plate. When the bearing plate is provided, the workpiece is placed on the bearing plate in the positioning groove 52. The provision of the Teflon plate can ensure that the surface of the workpiece will not be worn when the workpiece moves on it. When the workpiece is glass, the Teflon plate can effectively prevent the glass surface from being scratched.

[0048] Working principle: The staff or the manipulator stacks the workpieces to be processed from bottom to top on the workpiece placement carrier 22. During operation, the driving motor 212 drives the lifting screw 214 to rotate, thereby adjusting the height of the workpiece placement carrier 22 in the vertical direction, so that the upper surface of the processed workpiece located at the top of the workpiece placement carrier 22 is always level with the lifting induction component 3, thereby ensuring that the material picking height of the picking component is reached.

[0049] The material picking assembly sucks the workpiece and moves it into the corresponding positioning groove 52, and the piston rod of the push drive member 54 extends to drive the rolling assembly 55 to push the side of the workpiece opposite to its pushing surface against the groove edge 522, and then the piston rod of the push drive member 53 extends to push the workpiece along the rotation direction of the roller 551, so that the side of the workpiece opposite to the pushing surface of the push drive member 53 is pressed against the groove edge 521, thereby realizing the precise positioning of the workpiece.

[0050] When the workpiece is subsequently transferred to the mold, the positioning pin 9 on the material taking component is inserted into the docking socket 6 for positioning, and after positioning, it moves downward to absorb the workpiece, and the material pushing driving member 1 53 and the material pushing driving member 2 54 are reset, and the workpiece can be stably moved to the mold. The shape of the positioning groove 52, the spacing between adjacent positioning grooves 52, the corner formed by the intersection of the groove edge 1 521 and the groove edge 2 522, and the structure of the docking socket 6 are the same as the mold core of the mold for processing the workpiece, so that the position of the workpiece when it is subsequently placed on the mold for processing is more accurate.

[0051] It should be noted that each set of lifting and feeding components 2 and precise positioning components 5 can work independently without interfering with other sets set at the same time, which can effectively improve the processing efficiency of the workpiece.

[0052] The above implementation modes are only for illustrating the technical concept and features of the utility model, and their purpose is to allow people familiar with this technology to understand the content of the utility model and implement it. It cannot be used to limit the protection scope of the utility model. Any equivalent changes or modifications made according to the spirit of the utility model should be included in the protection scope of the utility model.

Claims

1. A precisely positioned feeding mechanism, characterized in that: The lifting and feeding assembly comprises at least one group of lifting and feeding components, at least one group of fine positioning components and a picking component for transporting workpieces; the lifting and feeding components correspond to the positions of the fine positioning components, the lifting and feeding components comprise a lifting drive component, the lifting drive component can drive the workpiece placed on the workpiece placing carrier to move and load, the lifting drive component comprises a vertically arranged driving motor, a driving mounting bracket and a lifting screw connected to its driving end, the fine positioning component comprises a limit member and a pushing drive component, the limit member comprises a positioning plate and a positioning groove provided on the positioning plate, the pushing drive component comprises a pushing drive component one and a pushing drive component two, the pushing drive component can push the workpiece onto the limit member, and the limit member is provided with a docking structure matching the positioning structure on the picking component, the docking structure is a plurality of docking sockets arranged on the limit member, and the positioning structure is a plurality of positioning pins corresponding to the positions of the docking sockets and matching in size.

2. A precisely positioned feeding mechanism according to claim 1, characterized in that: The lifting screw rod passes through the screw rod connecting plate and is connected thereto through a bearing. A guide lifting shaft parallel to the lifting screw rod is respectively arranged on both sides of the screw rod connecting plate. The workpiece placement carrier is located on the top of the guide lifting shaft.

3. A precisely positioned feeding mechanism according to claim 1, characterized in that: The positioning groove comprises a first groove edge and a second groove edge, and the push drive assembly presses two adjacent side edges of the workpiece onto the first groove edge and the second groove edge respectively.

4. A precisely positioned feeding mechanism according to claim 1, characterized in that: The positioning plate is arranged in a T shape, and the positioning grooves are arranged symmetrically along the center line of the length direction of the positioning plate.

5. A precisely positioned feeding mechanism according to claim 1, characterized in that: The material picking component is a mechanical gripper, and a plurality of vacuum suction cups are arranged on the lower surface of the mechanical gripper, and the positioning pins are located on the sides of the vacuum suction cups.

6. A precisely positioned feeding mechanism according to claim 1, characterized in that: It also includes a detachable lifting sensing component corresponding to the position of the lifting feeding component, and the lifting sensing component is a sensor.

7. A precisely positioned feeding mechanism according to claim 1, characterized in that: The pushing directions of the first and second material pushing driving members in the same plane are perpendicular, and a rolling component is horizontally arranged at the driving end of the second material pushing driving member.

8. A precisely positioned feeding mechanism according to claim 7, characterized in that: The rolling assembly comprises a horizontally arranged rolling support and a plurality of rollers arranged in parallel along the length direction of the rolling support.

9. A precisely positioned feeding mechanism according to claim 1, characterized in that: It also includes a plurality of limit frames arranged around the workpiece placement carrier, and a yield plate is arranged on the top of the limit frame in an inclined direction away from the workpiece placement carrier.

10. A precisely positioned feeding mechanism according to claim 3, characterized in that: A bearing plate is arranged in the positioning groove, and the bearing plate is a Teflon plate.

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