Accurate driving device for mechanical arm of injection molding machine

Abstract

The utility model provides a kind of accurate driving device of mechanical arm of injection molding machine, it is related to mechanical arm driving technical field, including protective belt, the side of the protective belt is provided with dismounting seat, cleaning brush is fixedly installed at the both ends of the dismounting seat, the laser ranging sensor that detects its position is fixedly installed at one end of the cleaning brush.The utility model has the advantages that: the protective belt that covers guide rail is additionally arranged on the driving structure of mechanical arm, and storage box that winds it is arranged at the both ends of the protective belt, according to the motion of mechanical arm, storage box is released or wound synchronously to the protective belt, the coverage protection of the guide rail of driving structure is maintained, the dust inside guide rail is reduced, and the cleaning brush that can be telescopic is arranged at one end of the bottom of movable lifting seat that drives mechanical arm to move, the guide rail inside driving structure is cleaned, further reduce the dust or sundries inside guide rail, ensure the stability and accuracy of mechanical arm driving device operation.

Description

Technical Field

[0001] This utility model relates to the field of robotic arm drive technology, and in particular to a precision drive device for the robotic arm of an injection molding machine. Background Technology

[0002] Injection molding machines are industrial equipment used to mold thermoplastic or thermosetting plastics into various shapes of plastic products using plastic molds. They are one of the core pieces of equipment in the plastics processing industry and are widely used in packaging, electronics, automotive, medical, and daily necessities industries. The robotic arm of an injection molding machine is an automated device specifically designed for the injection molding production process. It primarily replaces manual labor in performing a series of repetitive operations such as gripping, handling, stacking, trimming, and inspecting injection molded parts. By precisely coordinating with the production rhythm of the injection molding machine, it achieves automation, efficiency, and standardization in injection molding production. In modern injection molding plants, it effectively improves production efficiency, reduces labor costs, and ensures product quality. The drive unit of the injection molding machine's robotic arm is the core system that provides power for the movement of the arm and the action of the end effector (gripper). It directly determines the robotic arm's motion accuracy, speed, load capacity, and applicable scenarios. However, in the operation of existing robotic arm drive devices, some drive rails are exposed, which makes it easy for debris to fall into the exposed rails, affecting the stability and accuracy of the drive device's movement. Utility Model Content

[0003] Therefore, the purpose of this utility model is to propose a precision drive device for the robotic arm of an injection molding machine to solve the problems mentioned in the background art and overcome the shortcomings of the existing technology.

[0004] To achieve the above objectives, one embodiment of this utility model provides a precision drive device for a robotic arm of an injection molding machine, including a fixed guide rail base for support, a movable guide rail base for driving at the top of the fixed guide rail base, and a movable lifting seat for driving the robotic arm inside the movable guide rail base. The fixed guide rail base, the movable guide rail base, and the movable lifting seat all have motors and transmission components inside for driving them, ensuring stable driving of the robotic arm. Protective belts for enclosure and protection are fixedly installed at both ends of the movable lifting seat. A disassembly and assembly base for support and fixation is provided on one side of the protective belt. A cleaning brush for telescopic adjustment is fixedly installed at both ends of the disassembly and assembly base. A laser rangefinder sensor for position detection is fixedly installed at one end of the cleaning brush. The laser rangefinder sensor is signal-connected to a drive control unit for automated control. The drive control unit is connected to a control system for controlling the robotic arm, and precise control and adjustment of each component is performed through signal transmission and feedback to ensure stable operation of each structure. The drive control unit is signal-connected to a storage box for winding up the protective belt.

[0005] Preferably, in any of the above embodiments, the bottom of the fixed guide rail seat is provided with a fixed base for supporting it, the interior of the movable guide rail seat is provided with a guide groove for guiding and supporting the movable lifting seat, and the bottom of the movable lifting seat is provided with a connecting seat for support.

[0006] The above technical solution is adopted: the fixed guide rail seat (cast iron material) is fixed to the injection molding machine frame through the fixed base to provide stable support for the moving guide rail seat. The guide groove inside the moving guide rail seat forms a sliding fit with the slider of the movable lifting seat to ensure that the lifting seat moves in a straight line along the groove. The connecting seat (45# steel quenched and tempered) connects the movable lifting seat and the robotic arm, transmitting driving force while reducing vibration.

[0007] Preferably, in any of the above embodiments, the protective belt is movably connected to the interior of the movable guide rail base, and guide rollers are provided on both sides of the protective belt to guide it and to rotate in connection with the movable guide rail base.

[0008] The above technical solution is adopted: the protective belt (polyurethane material) covers the guide groove opening of the movable guide rail seat, and the guide rollers on both sides guide it to move with the movable lifting seat. When the movable lifting seat rises, the protective belt is released from the storage box on one side, and when it falls, the storage box on the other side is rolled up, keeping the guide rail closed at all times, preventing injection molding dust and coolant from entering, and reducing the wear rate of the guide rail.

[0009] Preferably, in any of the above solutions, the disassembly base is fixedly installed to one end of the connecting base by bolts, and the two ends of the disassembly base are provided with slots for storing the cleaning brush.

[0010] The above technical solution is adopted: the mounting base (aluminum alloy material) is fixed to the connecting base by M bolts, and the slots at both ends provide storage space for the cleaning brush (the brush plate is completely stored when not in working state). The bolt connection facilitates the disassembly and replacement of the cleaning brush, adapts to the cleaning needs under different working conditions (such as quick replacement after the brush wears out), and at the same time ensures that the cleaning components and the movable lifting base move synchronously.

[0011] Preferably, in any of the above embodiments, the cleaning brush includes a pneumatic telescopic rod connected to a drive control unit, a cleaning plate for telescopic adjustment, and a brush plate for cleaning the inside of the movable guide rail seat. The pneumatic telescopic rod is fixedly installed inside the disassembly and assembly seat, and a cleaning plate that moves inside the disassembly and assembly seat is fixedly installed at one end of the pneumatic telescopic rod. A brush plate is fixedly installed at one end of the cleaning plate.

[0012] The above technical solution is adopted: the pneumatic telescopic rod is extended and retracted under the command of the drive control unit. When cleaning is required, the telescopic rod pushes the cleaning plate (ABS material) to extend, and the brush plate (nylon bristles) contacts the inner wall of the guide groove of the moving guide rail seat. With the movement of the movable lifting seat, the brush plate sweeps away the debris in the groove. After cleaning is completed, the telescopic rod drives the cleaning plate to retract into the groove to avoid brush wear or interference with the movement of the guide rail.

[0013] Preferably, in any of the above embodiments, the laser rangefinder is fixedly installed inside the cleaning plate, and the laser rangefinder is located inside the mounting bracket.

[0014] The above technical solution is adopted: the laser rangefinder is fixed to the cleaning plate and detects the distance between it and the inner wall of the mounting and disassembly slot in real time. When not in operation, the distance is stable at the storage position. During cleaning, the distance gradually decreases as the cleaning plate extends. The data is transmitted to the drive control unit to accurately determine the position of the brush plate and avoid excessive extension that could cause the brush to deform or get stuck.

[0015] Preferably, as described in any of the above embodiments, the storage box includes a fixed box body for support, a winding motor connected to the drive control unit, and a reel for winding the protective strip. The fixed box body is fixedly installed at both ends of the movable guide rail seat. The winding motor is fixedly installed inside the fixed box body. The output end of the winding motor is fixedly installed with a reel that rotates inside the fixed box body. The reel and the protective strip are fixedly installed.

[0016] The above technical solution is adopted: the fixed box (made of stainless steel) is fixed at both ends of the movable guide rail seat, and the internal winding motor (servo motor) drives the winding shaft to rotate. The drive control unit controls the speed of the winding motor according to the displacement signal of the movable lifting seat (obtained through an encoder). When the lifting seat moves, the winding shaft synchronously winds up and unwinds the protective belt to maintain the tension of the protective belt (the tension is adjustable) and avoid slack and wrinkles affecting the motion accuracy.

[0017] A fixed guide rail supports a movable guide rail. The guide groove of the movable guide rail guides the movable lifting seat to drive the robotic arm. The connecting seat enhances the connection stability. When the movable lifting seat moves, the drive control unit controls the winding motor of the storage box to drive the reel. The protective belt is wound up and down synchronously through the guide rollers to cover the guide rail and prevent debris from entering. The disassembly seat moves with the connecting seat. The drive control unit can control the pneumatic telescopic rod of the cleaning brush to push the cleaning plate, so that the brush cleans the guide rail. The laser range sensor detects the position of the cleaning plate and feeds back the signal. The drive control unit makes precise adjustments accordingly. All structures work together to ensure accurate and stable drive. The drive control unit is the core, linking all structures to achieve "protection-cleaning-movement" coordination, ensuring the cleanliness of the guide rail throughout the process and maintaining the positioning accuracy of the robotic arm.

[0018] Compared with the prior art, the advantages and beneficial effects of this utility model are as follows: 1. A protective strip is added to the drive structure of the robotic arm to cover the guide rail, and storage boxes are set at both ends of the protective strip to retract it. The storage boxes release or retract the protective strip synchronously according to the movement of the robotic arm, so as to maintain the coverage and protection of the guide rail of the drive structure and reduce dust accumulation inside the guide rail. At the same time, a retractable cleaning brush is set at one end of the bottom of the movable lifting seat that drives the robotic arm to clean the inside of the guide rail of the drive structure, further reducing dust or debris inside the guide rail and ensuring the stability and accuracy of the robotic arm drive device.

[0019] 2. A laser rangefinder sensor is installed at one end of the cleaning brush to detect its position. The detection data of the laser rangefinder sensor, combined with the inherent dimensions of the robotic arm drive device, makes it easy to accurately determine the position of the cleaning brush, which facilitates precise adjustment of the cleaning brush and ensures the stability of the cleaning process of the drive device.

[0020] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0021] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which: Figure 1 This is a schematic diagram of the structure according to an embodiment of the present utility model; Figure 2 This is a partial structural schematic diagram according to an embodiment of the present utility model; Figure 3 This is a cross-sectional structural diagram of the movable guide rail base according to an embodiment of the present utility model; Figure 4 This is a cross-sectional structural diagram of the disassembly and assembly base according to an embodiment of the present utility model; Among them: 1-fixed guide rail seat, 2-movable guide rail seat, 3-movable lifting seat, 4-protective belt, 5-disassembly seat, 6-cleaning brush, 61-pneumatic telescopic rod, 62-cleaning plate, 63-brush plate, 7-laser rangefinder sensor, 8-storage box, 81-fixed box body, 82-winding motor, 83-reel, 9-connecting seat. Detailed Implementation

[0022] The present invention will be further described below with reference to the accompanying drawings, but the scope of protection of the present invention is not limited to the following description.

[0023] like Figure 1-4As shown in the figure, a precision drive device for a robotic arm of an injection molding machine according to an embodiment of the present invention includes a fixed guide rail seat 1 for support, a movable guide rail seat 2 for driving at the top of the fixed guide rail seat 1, and a movable lifting seat 3 for driving the robotic arm inside the movable guide rail seat 2. The fixed guide rail seat 1, the movable guide rail seat 2, and the movable lifting seat 3 are all equipped with motors and transmission components for driving the robotic arm, ensuring stable driving. Protective belts 4 are fixedly installed at both ends of the movable lifting seat 3 to enclose and protect it. A disassembly and assembly seat 5 for support and fixation is provided on one side of the protective belt 4. A cleaning brush 6 for telescopic adjustment is fixedly installed at both ends of the disassembly and assembly seat 5. A laser rangefinder sensor 7 for position detection is fixedly installed at one end of the cleaning brush 6. The laser rangefinder sensor 7 is signal-connected to a drive control unit for automated control. The drive control unit is connected to the control system for controlling the robotic arm, and through signal transmission and feedback, precise control and adjustment of each component is performed to ensure stable operation of each structure. The drive control unit is signal-connected to a storage box 8 for winding up the protective belt 4.

[0024] Preferably, the bottom of the fixed guide rail seat 1 is provided with a fixed base to support it, the interior of the movable guide rail seat 2 is provided with a guide groove to guide and support the movable lifting seat 3, and the bottom of the movable lifting seat 3 is provided with a connecting seat 9 for support.

[0025] The above technical solution is adopted: the fixed guide rail seat 1 (cast iron material) is fixed to the injection molding machine frame through the fixed base to provide stable support for the movable guide rail seat 2. The guide groove inside the movable guide rail seat 2 forms a sliding fit with the slider of the movable lifting seat 3 to ensure that the lifting seat moves in a straight line along the groove. The connecting seat 9 (45# steel tempered) connects the movable lifting seat and the robotic arm, transmitting driving force while reducing vibration.

[0026] Preferably, in any of the above solutions, the protective belt 4 is movably connected to the interior of the movable guide rail 2, and guide rollers are provided on both sides of the protective belt 4 to guide it and to rotate in connection with the movable guide rail 2.

[0027] The above technical solution is adopted: the protective belt 4 (polyurethane material) covers the guide groove opening of the movable guide rail seat 2, and the guide rollers on both sides guide it to move with the movable lifting seat 3. When the movable lifting seat rises, the protective belt is released from the storage box on one side, and when it falls, the storage box on the other side is rolled up, keeping the guide rail closed at all times, preventing injection molding dust and coolant from entering, and reducing the wear rate of the guide rail.

[0028] Preferably, in any of the above solutions, the disassembly base 5 is fixedly installed at one end of the connecting base by bolts, and the two ends of the disassembly base 5 are provided with slots for storing the cleaning brush 6.

[0029] The above technical solution is adopted: the disassembly base 5 (aluminum alloy material) is fixed to the connecting base 9 by 4 M6 bolts. The slots at both ends provide storage space for the cleaning brush 6 (the brush plate is completely stored when not in working state). The bolt connection facilitates the disassembly and replacement of the cleaning brush, adapts to the cleaning needs under different working conditions (such as quick replacement after the brush wears out), and ensures that the cleaning components and the movable lifting base move synchronously.

[0030] Preferably, the cleaning brush 6 includes a pneumatic telescopic rod 61 connected to the drive control unit, a cleaning plate 62 for telescopic adjustment, and a brush plate 63 for cleaning the inside of the movable guide rail seat 2. The pneumatic telescopic rod 61 is fixedly installed inside the disassembly and assembly seat 5. One end of the pneumatic telescopic rod 61 is fixedly installed with the cleaning plate 62 that moves inside the disassembly and assembly seat 5, and one end of the cleaning plate 62 is fixedly installed with the brush plate 63.

[0031] Using the above technical solution: the pneumatic telescopic rod 61 is extended and retracted by the drive control unit. When cleaning is required, the telescopic rod pushes the cleaning plate 62 (ABS material) to extend, and the brush plate 63 (nylon bristles) contacts the inner wall of the guide groove of the movable guide rail seat 2. It moves with the movable lifting seat, and the brush plate sweeps away the debris in the groove. After cleaning is completed, the telescopic rod drives the cleaning plate to retract into the groove to avoid brush wear or interference with the movement of the guide rail.

[0032] Preferably, in any of the above solutions, the laser rangefinder 7 is fixedly installed inside the cleaning plate 62, and the laser rangefinder 7 is located inside the mounting base 5.

[0033] The above technical solution is adopted: the laser range sensor 7 is fixed to the cleaning plate 62 and detects the distance between it and the inner wall of the slot of the mounting base 5 in real time. When not in working state, the distance is stable at the storage position. During cleaning, the distance gradually decreases as the cleaning plate extends. The data is transmitted to the drive control unit to accurately determine the position of the brush plate and avoid excessive extension that could cause the brush to deform or get stuck.

[0034] Preferably, the storage box 8 includes a fixed box body 81 for support, a winding motor 82 connected to the drive control unit, and a reel 83 for winding the protective belt 4. The fixed box body 81 is fixedly installed at both ends of the movable guide rail seat 2. The winding motor 82 is fixedly installed inside the fixed box body 81. The output end of the winding motor 82 is fixedly installed with the reel 83 that rotates inside the fixed box body 81. The reel 83 and the protective belt 4 are fixedly installed.

[0035] The above technical solution is adopted: the fixed housing 81 (made of stainless steel) is fixed at both ends of the movable guide rail 2, and the internal winding motor 82 (servo motor) drives the winding shaft 83 to rotate. The drive control unit controls the speed of the winding motor according to the displacement signal of the movable lifting seat 3 (obtained through an encoder). When the lifting seat moves, the winding shaft synchronously winds up and unwinds the protective belt to maintain the tension of the protective belt (the tension is adjustable) and avoid slack and wrinkles affecting the motion accuracy.

[0036] The working principle of the precision drive device for the robotic arm of the injection molding machine of this utility model is as follows: When the movable lifting platform 3 drives the robotic arm to move, the winding motor 82 of the storage box 8 synchronously winds up and unwinds the protective belt 4, always covering the guide rail. When a set time (such as every hour) is set or when an increase in resistance is detected, the drive control unit starts the cleaning brush 6. The pneumatic telescopic rod 61 pushes the brush plate 63 to extend. The laser range sensor 7 provides feedback on the position. The brush plate moves with the lifting platform to clean the guide rail. After cleaning is completed, the telescopic rod drives the brush plate to retract. The sensor confirms that the brush plate is in place, and the device returns to normal driving state.

[0037] Compared with the prior art, the present invention has the following advantages: 1. A protective belt 4 is added to the drive structure of the robotic arm to cover the guide rail, and a storage box 8 is set at both ends of the protective belt 4 to retract it. According to the movement control of the robotic arm, the storage box 8 releases or retracts the protective belt 4 synchronously to maintain the coverage and protection of the drive structure guide rail, reduce dust falling inside the guide rail. At the same time, a retractable cleaning brush 6 is set at one end of the bottom of the movable lifting seat 3 that drives the movement of the robotic arm to clean the inside of the drive structure guide rail, further reducing dust or debris inside the guide rail, and ensuring the stability and accuracy of the operation of the robotic arm drive device.

[0038] 2. A laser rangefinder 7 is installed at one end of the cleaning brush 6 to detect its position. The position of the cleaning brush 6 can be accurately determined by the detection data of the laser rangefinder 7 combined with the inherent size of the robotic arm drive device, which facilitates precise adjustment of the cleaning brush 6 and ensures the stability of the cleaning of the drive device.

Claims

1. A precision drive device for a robotic arm of an injection molding machine, comprising a fixed guide rail base (1) for support, a movable guide rail base (2) for driving is provided at the top of the fixed guide rail base (1), and a movable lifting seat (3) for driving the robotic arm is provided inside the movable guide rail base (2), characterized in that: The movable lifting seat (3) is fixedly installed with protective belts (4) for sealing and protection at both ends. A disassembly seat (5) for support and fixation is provided on one side of the protective belt (4). A cleaning brush (6) for telescopic adjustment is fixedly installed at both ends of the disassembly seat (5). A laser range sensor (7) for detecting the position of the cleaning brush (6) is fixedly installed at one end. The laser range sensor (7) is connected to a drive control unit for automatic control. The drive control unit is connected to a storage box (8) for winding up the protective belt (4).

2. The precision drive device for the robotic arm of an injection molding machine as described in claim 1, characterized in that: The bottom of the fixed guide rail seat (1) is provided with a fixed base to support it, the interior of the movable guide rail seat (2) is provided with a guide groove to guide and support the movable lifting seat (3), and the bottom of the movable lifting seat (3) is provided with a connecting seat (9) for support.

3. The precision drive device for the robotic arm of an injection molding machine as described in claim 2, characterized in that: The protective belt (4) is movably connected to the interior of the movable guide rail seat (2), and guide rollers are provided on both sides of the protective belt (4) to guide it and to rotate and connect with the movable guide rail seat (2).

4. The precision drive device for the robotic arm of an injection molding machine as described in claim 3, characterized in that: The disassembly base (5) is fixedly installed at one end of the connecting base by bolts, and the two ends of the disassembly base (5) are provided with slots for storing the cleaning brush (6).

5. The precision drive device for the robotic arm of an injection molding machine as described in claim 4, characterized in that: The cleaning brush (6) includes a pneumatic telescopic rod (61) connected to the drive control unit, a cleaning plate (62) for telescopic adjustment, and a brush plate (63) for cleaning the inside of the movable guide rail seat (2). The pneumatic telescopic rod (61) is fixedly installed inside the disassembly seat (5). One end of the pneumatic telescopic rod (61) is fixedly installed with a cleaning plate (62) that moves inside the disassembly seat (5). One end of the cleaning plate (62) is fixedly installed with a brush plate (63).

6. The precision drive device for the robotic arm of an injection molding machine as described in claim 5, characterized in that: The laser rangefinder (7) is fixedly installed inside the cleaning plate (62), and the laser rangefinder (7) is located inside the mounting base (5).

7. The precision drive device for the robotic arm of an injection molding machine as described in claim 6, characterized in that: The storage box (8) includes a fixed box body (81) for support, a winding motor (82) connected to the drive control unit, and a reel (83) for winding the protective belt (4). The fixed box body (81) is fixedly installed at both ends of the movable guide rail seat (2). The winding motor (82) is fixedly installed inside the fixed box body (81). The output end of the winding motor (82) is fixedly installed with the reel (83) that rotates inside the fixed box body (81). The reel (83) and the protective belt (4) are fixedly installed.

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