Injection molding machine ac shaft gripping device

Abstract

The application relates to the technical field of injection molding machines, in particular to an AC shaft grabbing device of an injection molding machine, which comprises a fixed base, an A shaft transmission assembly, an L-shaped connecting frame and a C shaft transmission assembly, and the output end of the C shaft transmission assembly is fixedly connected with an executor mounting plate; two sets of clamping units are symmetrically arranged on the executor mounting plate, each set of the clamping units is provided with a sliding rail, a clamping driving assembly is arranged in the middle of the sliding rail, and clamping jaws are slidably arranged at the two ends of the sliding rail; the clamping driving assembly is connected with the clamping jaws through a transmission rod; and a spacing adjusting module is arranged between the two sets of clamping units. Through the arrangement of the A shaft transmission assembly and the C shaft transmission assembly, two-axis rotation of the grabbing device in space is realized, a larger working range can be covered, and injection molds with different layouts can be adapted; the two sets of symmetrically arranged clamping units cooperate with the spacing adjusting module, the spacing can be automatically adjusted according to the size of an injection molded part, compatible grabbing of products with different specifications is realized, manual model changing and adjusting time is reduced, and production efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of injection molding machine technology, and in particular to an AC axis gripping device for injection molding machines. Background Technology

[0002] In the field of automated injection molding production, the injection molding machine's gripping device is a core piece of equipment for achieving continuous and efficient production. Its main function is to quickly and accurately remove the injection-molded workpiece from the mold and transfer it to a designated workstation for subsequent processes such as sorting and assembly. With the rapid development of intelligent manufacturing technology, the injection molding industry is constantly demanding higher levels of automation and flexibility in its production equipment. High-performance gripping devices that can flexibly adapt to different mold layouts and are compatible with gripping various product specifications have become crucial for improving enterprise production efficiency and product quality.

[0003] However, current injection molding machine gripping devices on the market still have shortcomings. On the one hand, most devices have simple motion mechanisms, possessing only single-axis rotation or simple linear motion functions, making it difficult to achieve precise multi-dimensional spatial positioning and meet the part-grabbing requirements of complex mold layouts. This results in poor equipment versatility and difficulty in adapting to diverse production scenarios. On the other hand, the clamping units of traditional gripping devices are mostly manually adjustable in spacing. When dealing with injection molded parts of different sizes and shapes, a significant amount of time is required for mechanical adjustments and parameter calibration, severely impacting production efficiency. Simultaneously, some gripper devices are prone to uneven gripping force, causing deformation or damage to thin-walled or irregularly shaped injection molded parts during gripping, increasing the defect rate. Furthermore, existing devices often struggle to achieve efficient linkage between gripping actions and processes such as inspection and sorting, failing to meet the demands of intelligent production lines for full-process automation. Summary of the Invention

[0004] To address the above issues, this application provides an AC-axis gripping device for an injection molding machine, comprising a fixed base, an A-axis transmission assembly, an L-shaped connecting frame, and a C-axis transmission assembly. The output end of the C-axis transmission assembly is fixedly connected to an actuator mounting plate. Two sets of clamping units are symmetrically arranged on the actuator mounting plate. Each set of clamping units is provided with a slide rail. A clamping drive assembly is provided in the middle of the slide rail. Grippers are slidably arranged at both ends of the slide rail. The clamping drive assembly is connected to the grippers via a transmission rod. A spacing adjustment module is provided between the two sets of clamping units.

[0005] In one embodiment, the clamping drive assembly is a double-rod hydraulic cylinder, with the piston rods at both ends of the double-rod hydraulic cylinder respectively connected to the transmission rod, driving the grippers to move synchronously towards each other along the slide rail.

[0006] In one embodiment, the clamping drive assembly is a rotary drive mechanism, wherein the transmission rod is symmetrically hinged to both sides of the rotor of the rotary drive mechanism, and the rotary drive mechanism pulls the gripper along the slide rail when it rotates.

[0007] In one embodiment, the spacing adjustment module consists of two telescopic cylinders, each connected to the clamping unit.

[0008] In one embodiment, a vision inspection module is integrated on the actuator mounting plate.

[0009] In one embodiment, a controller is also provided. The controller receives workpiece quality and size signals from the vision inspection module. The controller controls the spacing adjustment module to adjust the clamping span and, in conjunction with the A-axis transmission assembly and the C-axis transmission assembly, moves the workpiece to the good product area or the defective product area.

[0010] In one embodiment, the A-axis transmission assembly includes an A-axis drive motor and an A-axis harmonic reducer; the C-axis transmission assembly includes a C-axis drive motor and a C-axis harmonic reducer, and the actuator mounting plate is fixedly mounted on the C-axis harmonic reducer.

[0011] In one embodiment, the spacing adjustment module is a dual-rod hydraulic cylinder, with both ends connected to the clamping unit.

[0012] The beneficial effects of this utility model are as follows:

[0013] This application discloses an AC-axis gripping device for injection molding machines. By setting up A-axis and C-axis transmission components, the gripping device achieves two-axis rotation in space, covering a wider working range and adapting to injection molds with different layouts, significantly improving the versatility and flexibility of the equipment. The two symmetrically arranged clamping units, in conjunction with the spacing adjustment module, can automatically adjust the spacing according to the size of the injection molded parts, achieving compatible gripping of products of different specifications, reducing manual changeover time, and improving production efficiency. By setting up a clamping drive component, the grippers at both ends are driven simultaneously to achieve synchronous opening and closing actions, ensuring uniform distribution of gripping force, avoiding damage to injection molded parts due to uneven force, and improving product qualification rate. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model;

[0015] Figure 2 This is a schematic diagram of the AC shaft drive assembly structure;

[0016] Figure 3 This is a schematic diagram of two sets of clamping unit structures;

[0017] Figure 4 This is a schematic diagram of the clamping unit structure;

[0018] Explanation of symbols in the diagram:

[0019] 1. Fixed base;

[0020] 2. A-axis transmission assembly; 21. A-axis drive motor; 22. A-axis harmonic reducer;

[0021] 3. L-shaped connecting bracket;

[0022] 4. C-axis transmission assembly; 41. C-axis drive motor; 42. C-axis harmonic reducer;

[0023] 5. Actuator mounting plate;

[0024] 6. Clamping unit; 61. Slide rail; 62. Clamping drive assembly; 63. Gripper; 64. Transmission rod;

[0025] 7. Spacing adjustment module;

[0026] 8. Visual inspection module. Detailed Implementation

[0027] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0028] It should be noted that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0029] like Figure 1-4 As shown, an AC axis gripping device for an injection molding machine includes a fixed base 1, an A-axis transmission assembly 2, an L-shaped connecting frame 3, and a C-axis transmission assembly 4. The output end of the C-axis transmission assembly 4 is fixedly connected to an actuator mounting plate 5. Two sets of clamping units 6 are symmetrically arranged on the actuator mounting plate 5. Each set of clamping units 6 is provided with a slide rail 61. A clamping drive assembly 62 is provided in the middle of the slide rail 61. Claws 63 are slidably arranged at both ends of the slide rail 61. The clamping drive assembly 62 is connected to the claws 63 through a transmission rod 64. A spacing adjustment module 7 is provided between the two sets of clamping units 6.

[0030] Specifically, the fixed base 1 serves as the supporting foundation for the entire device. The A-axis transmission assembly 2 is vertically mounted on the fixed base 1 via bolts, and its output shaft is rigidly connected to the vertical end of the L-shaped connecting frame 3, driving the L-shaped connecting frame 3 to rotate around the A-axis. The horizontal end of the L-shaped connecting frame 3 is fixedly connected to the housing of the C-axis transmission assembly 4. The output end of the C-axis transmission assembly 4 is connected to the actuator mounting plate 5, which can drive the actuator mounting plate 5 to rotate. Two sets of clamping units 6 are symmetrically arranged on the actuator mounting plate 5. The slide rail 61 of each clamping unit 6 is fixed to the surface of the actuator mounting plate 5. A clamping drive assembly 62 is installed in the middle of the slide rail 61, and the jaws 63 at both ends are slidably connected to the slide rail 61. The power output end of the clamping drive assembly 62 is connected to the jaws 63 through a transmission rod 64, realizing the opening and closing action of the jaws 63. The spacing adjustment module 7 is fixed on the actuator mounting plate 5 and drives the two sets of clamping units 6 to move towards or away from each other along the surface of the mounting plate, adjusting the spacing between them. When the device is working, the A-axis transmission assembly 2 first drives the L-shaped connecting frame 3 to rotate to a preset angle, aligning the actuator mounting plate 5 and the clamping unit 6 with the material-grabbing position of the injection mold. Subsequently, the C-axis transmission assembly 4 actuates, driving the actuator mounting plate 5 to rotate around the horizontal axis, adjusting the clamping unit 6 to a suitable gripping posture. The spacing adjustment module 7 drives the two sets of clamping units 6 to move to a predetermined spacing according to the size of the injection molded part to be gripped. At this time, the clamping drive assembly 62 is activated, pushing the gripper 63 to move linearly along the slide rail 61 through the transmission rod 64, realizing the closing action of the gripper and completing the gripping of the injection molded part. After gripping, the A-axis transmission assembly 2 and the C-axis transmission assembly 4 work together to transfer the injection molded part to the designated position, and the clamping drive assembly 62 reverses to drive the gripper 63 to open, releasing the injection molded part. Throughout the process, the linkage between the A-axis transmission assembly 2 and the C-axis transmission assembly 4 enables positioning at any angle in space, while the cooperation between the spacing adjustment module 7 and the clamping unit 6 can adapt to the gripping needs of injection molded parts of different sizes and shapes. In this application, by setting the A-axis transmission assembly 2 and the C-axis transmission assembly 4, the gripping device achieves two-axis rotation in space, covering a larger working range and adapting to injection molds with different layouts, significantly improving the versatility and flexibility of the equipment; the two symmetrically arranged clamping units 6, in conjunction with the spacing adjustment module 7, can automatically adjust the spacing according to the size of the injection molded part, achieving compatible gripping of products of different specifications, reducing manual changeover adjustment time, and improving production efficiency; by setting the clamping drive assembly 62, simultaneously driving the grippers 63 at both ends, synchronous opening and closing actions are achieved, ensuring uniform distribution of gripping force, avoiding damage to injection molded parts due to uneven force, and improving product qualification rate.

[0031] like Figure 4 As shown, the clamping drive assembly 62 is a rotary drive mechanism. The rotor of the rotary drive mechanism is symmetrically hinged with transmission rods 64 on both sides. When the rotary drive mechanism rotates, it pulls the gripper 63 to move along the slide rail 61.

[0032] Specifically, the clamping drive assembly 62 is a rotary drive mechanism. The rotary drive mechanism converts the rotational motion into the linear motion of the grippers 63 along the slide rail 61 through the transmission rods 64 symmetrically hinged on both sides of the rotor. This ensures that the grippers 63 on both sides move synchronously, thereby achieving a uniform clamping force on the injection molded part and effectively preventing product damage caused by uneven force.

[0033] In another embodiment, the clamping drive assembly 62 can also be a double-rod hydraulic cylinder, with the piston rods at both ends of the double-rod hydraulic cylinder connected to the transmission rod 64 respectively, driving the gripper 63 to move synchronously towards each other along the slide rail 61.

[0034] Specifically, the clamping drive assembly 62 is a double-rod hydraulic cylinder. The synchronous extension and retraction of the piston rods at both ends of the double-rod hydraulic cylinder can directly and stably drive the transmission rod 64, ensuring that the two grippers 63 move synchronously towards each other along the slide rail 61. This precisely controls the clamping force and speed, avoiding the risk of uneven force on the injection molded part, deformation, or falling off due to asynchronous movement of the grippers 63. The double-rod hydraulic cylinder operates with balanced force, ensuring the accuracy and efficiency of the injection molding machine's material handling process.

[0035] like Figure 3 As shown, the spacing adjustment module 7 consists of two telescopic cylinders, which are connected to the clamping unit 6 respectively.

[0036] Specifically, the spacing adjustment module 7 consists of two telescopic cylinders, with the cylinder bodies fixed to the actuator mounting plate 5 and the piston rods connected to the clamping units 6 on both sides. By independently controlling the extension and retraction of the two telescopic cylinders, the spacing between the two clamping units 6 can be precisely adjusted, achieving adaptive gripping of injection molded parts of different sizes. In this application, the spacing adjustment module 7 can also be a double-rod hydraulic cylinder.

[0037] like Figure 3 As shown, the actuator mounting plate 5 integrates a vision inspection module 8.

[0038] Specifically, a vision inspection module 8 is integrated on the actuator mounting plate 5, realizing the integration of detection and gripping during the material handling process, greatly improving the intelligence and accuracy of the device. The vision inspection module 8 can collect information such as the position, size, and appearance defects of the injection molded parts in real time, providing accurate positioning data for the A-axis transmission assembly 2 and the C-axis transmission assembly 4, guiding the clamping unit 6 to grip the injection molded parts in the optimal posture, avoiding gripping failures caused by manual positioning deviations or mold errors. In addition, the vision inspection module 8 can perform preliminary quality screening of the injection molded parts before gripping, promptly removing unqualified products and reducing ineffective processing in subsequent processes.

[0039] like Figure 2 , 3As shown, a controller is also provided. The controller receives the workpiece quality and size signals from the vision inspection module 8. The controller controls the spacing adjustment module 7 to adjust the clamping span and links the A-axis transmission assembly 2 and the C-axis transmission assembly 4 to transfer the workpiece to the good product area or the defective product area.

[0040] Specifically, a highly intelligent closed-loop working system is constructed by using a controller to achieve coordinated control of the vision inspection module 8, the spacing adjustment module 7, the A-axis transmission assembly 2, and the C-axis transmission assembly 4. The controller receives workpiece quality and size signals from the vision inspection module 8 in real time, quickly analyzes and judges them based on preset standards, and precisely controls the spacing adjustment module 7 to adjust the clamping span, ensuring that the clamping unit 6 is suitable for workpieces of different specifications and avoiding damage caused by improper gripping. Simultaneously, based on the workpiece quality inspection results, the controller coordinates with the A-axis transmission assembly 2 and the C-axis transmission assembly 4 to automatically classify and transfer good and defective products to the corresponding areas, completely replacing manual sorting and significantly improving sorting efficiency and accuracy.

[0041] like Figure 2 As shown, the A-axis transmission assembly 2 includes an A-axis drive motor 21 and an A-axis harmonic reducer 22; the C-axis transmission assembly 4 includes a C-axis drive motor 41 and a C-axis harmonic reducer 42, and the actuator mounting plate 5 is fixedly mounted on the C-axis harmonic reducer 42.

[0042] Specifically, the A-axis transmission assembly 2 and the C-axis transmission assembly 4 each employ a drive motor paired with a harmonic reducer, significantly improving the motion accuracy and stability of the gripping device. The coordinated operation of the A-axis drive motor 21 and A-axis harmonic reducer 22, and the C-axis drive motor 41 and C-axis harmonic reducer 42, utilizes the high precision, high transmission ratio, and low backlash characteristics of the harmonic reducer to accurately convert the motor's rotational motion into the angular displacement of the actuator mounting plate 5, ensuring high-precision positioning in the A-axis and C-axis directions and meeting the stringent requirements of precision injection molded parts for gripping posture. Simultaneously, the harmonic reducer's compact structure and high transmission efficiency effectively reduce the device's space occupation and energy consumption.

[0043] This application provides an AC-axis gripping device for an injection molding machine. During operation, the A-axis transmission assembly 2 first drives the L-shaped connecting frame 3 to rotate to a preset angle, aligning the actuator mounting plate 5 and clamping unit 6 with the material-grabbing position of the injection mold. Subsequently, the C-axis transmission assembly 4 actuates, driving the actuator mounting plate 5 to rotate around a horizontal axis, adjusting the clamping unit 6 to a suitable gripping posture. The spacing adjustment module 7, based on the size of the injection molded part to be gripped, drives the two sets of clamping units 6 to move to a predetermined spacing. At this time, the gripping drive assembly 62 activates, pushing the gripper 63 along the slide rail 61 in a linear motion via the transmission rod 64, achieving the closing action of the gripper and completing the gripping of the injection molded part. After gripping, the A-axis transmission assembly 2 and the C-axis transmission assembly 4 work together to transfer the injection molded part to a designated position. The gripping drive assembly 62 then reverses to drive the gripper 63 to open, releasing the injection molded part. Throughout the process, the linkage between the A-axis transmission assembly 2 and the C-axis transmission assembly 4 enables positioning at any angle in space, while the cooperation between the spacing adjustment module 7 and the clamping unit 6 can adapt to the gripping needs of injection molded parts of different sizes and shapes. In this application, by setting the A-axis transmission assembly 2 and the C-axis transmission assembly 4, the gripping device achieves two-axis rotation in space, covering a larger working range and adapting to injection molds with different layouts, significantly improving the versatility and flexibility of the equipment; the two symmetrically arranged clamping units 6, in conjunction with the spacing adjustment module 7, can automatically adjust the spacing according to the size of the injection molded part, achieving compatible gripping of products of different specifications, reducing manual changeover adjustment time, and improving production efficiency; by setting the clamping drive assembly 62, simultaneously driving the grippers 63 at both ends, synchronous opening and closing actions are achieved, ensuring uniform distribution of gripping force, avoiding damage to injection molded parts due to uneven force, and improving product qualification rate.

[0044] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

[0045] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

Claims

1. An AC axis gripping device for an injection molding machine, comprising a fixed base (1), an A-axis transmission assembly (2), an L-shaped connecting frame (3), and a C-axis transmission assembly (4), wherein the output end of the C-axis transmission assembly (4) is fixedly connected to an actuator mounting plate (5); two sets of clamping units (6) are symmetrically arranged on the actuator mounting plate (5), each set of clamping units (6) is provided with a slide rail (61), a clamping drive assembly (62) is provided in the middle of the slide rail (61), and grippers (63) are slidably arranged at both ends of the slide rail (61), wherein the clamping drive assembly (62) is connected to the grippers (63) through a transmission rod (64), characterized in that: A spacing adjustment module (7) is provided between the two sets of clamping units (6).

2. The injection molding machine AC axis gripping device according to claim 1, characterized in that, The clamping drive assembly (62) is a double-rod hydraulic cylinder. The piston rods at both ends of the double-rod hydraulic cylinder are respectively connected to the transmission rod (64) to drive the gripper (63) to move synchronously towards each other along the slide rail (61).

3. The injection molding machine AC axis gripping device according to claim 1, characterized in that, The clamping drive assembly (62) is a rotary drive mechanism. The transmission rod (64) is symmetrically hinged to both sides of the rotor of the rotary drive mechanism. When the rotary drive mechanism rotates, it pulls the gripper (63) to move along the slide rail (61).

4. The injection molding machine AC axis gripping device according to claim 1, characterized in that, The spacing adjustment module (7) consists of two telescopic cylinders, which are connected to the clamping unit (6) respectively.

5. The injection molding machine AC axis gripping device according to claim 1, characterized in that, The actuator mounting plate (5) integrates a vision inspection module (8).

6. The injection molding machine AC axis gripping device according to claim 5, characterized in that, A controller is also provided. The controller receives the workpiece quality and size signals from the vision inspection module (8). The controller controls the spacing adjustment module (7) to adjust the clamping span and links the A-axis transmission assembly (2) and the C-axis transmission assembly (4) to transfer the workpiece to the good product area or the defective product area.

7. The injection molding machine AC axis gripping device according to claim 1, characterized in that, The A-axis transmission assembly (2) includes an A-axis drive motor (21) and an A-axis harmonic reducer (22); the C-axis transmission assembly (4) includes a C-axis drive motor (41) and a C-axis harmonic reducer (42), and the actuator mounting plate (5) is fixedly mounted on the C-axis harmonic reducer (42).

8. The injection molding machine AC axis gripping device according to claim 1, characterized in that, The spacing adjustment module (7) is a double-rod hydraulic cylinder, with both ends connected to the clamping unit (6).

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