Manipulator for injection molding machine

Abstract

The utility model discloses a manipulator for an injection molding machine. The manipulator comprises a mounting seat, a driving box is fixedly connected to the upper side of the mounting seat, an arm support is rotatably matched with the lower side of the inner wall of the driving box, a telescopic assembly is arranged on one side of the arm support, a lifting air cylinder is arranged on the telescopic assembly, and the output end of the lifting air cylinder is fixedly connected with an empty groove block. By arranging the tightening assembly, the tightening plate, the pressure sensor, the spring and the stress block, when a product is clamped, the tightening plate extrudes the stress block, the stress block transmits to the pressure sensor through the spring, rotation of the two-way lead screw is accurately adjusted according to feedback information, the clamping force of the two clamping plates is dynamically adjusted, and the product clamping efficiency is improved. And the situation that the product is damaged due to too large clamping force or the product is not firmly clamped due to too small clamping force is effectively avoided, the adaptability to different injection molding products in the clamping force aspect is improved, and the product operation quality is improved.

Description

Technical Field

[0001] This utility model relates to the field of robotic arm technology, specifically a robotic arm for injection molding machines. Background Technology

[0002] A robotic arm used in injection molding machines is an automated mechanical device applied in the injection molding production process. It can mimic some of the movement functions of the human upper limbs and perform gripping, handling, placement, and other operations on the products or related molds produced by the injection molding machine according to preset programs and instructions, so as to assist the injection molding machine in better completing the entire production process and improving production efficiency and product quality.

[0003] A search revealed Chinese patent application CN202221179058.3, which discloses a robotic arm for an injection molding machine. The arm includes a plate, two cylinders, two vertical arms, two clamping plates, two sets of buffer mechanisms, and blocks. The plate has a sliding groove, and both vertical arms are slidably connected to the groove. Both cylinders are mounted on the plate, and their output ends are fixedly connected to their respective vertical arms. The clamping plates are respectively positioned on their respective vertical arms. The two sets of buffer mechanisms are symmetrically arranged on the two vertical arms. The blocks are connected to both sets of buffer mechanisms. Each buffer mechanism includes two connecting blocks, two sliders, two springs, and a telescopic rod. Both vertical arms have grooves. One end of the telescopic rod is fixedly connected to one of the sliders, and the other end is fixedly connected to the other slider. This design allows the two vertical arms to be buffered when driven by the cylinders to move in opposite directions, preventing damage to the product.

[0004] Regarding the aforementioned technologies, the inventors have discovered the following drawbacks: Although the existing technologies reduce damage to products by buffering the two vertical arms, in actual use, when clamping different products, while the cylinder can control the clamping force to a certain extent, operators often control the clamping force by preset parameters such as air pressure and flow rate. Throughout the clamping process, the actual clamping force cannot be accurately determined, nor can it be adjusted in a timely manner according to the actual situation. This can lead to situations where the clamping force is too large or too small, causing damage or the product to fall off, resulting in defective products and affecting production quality. Therefore, it is necessary to design a highly practical and precise clamping robot for injection molding machines. Utility Model Content

[0005] The purpose of this invention is to provide a robotic arm for injection molding machines to solve the problems mentioned in the background art.

[0006] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a robotic arm for an injection molding machine, including a mounting base, a drive box fixedly connected to the upper side of the mounting base, an arm bracket rotatably fitted to the lower side of the inner wall of the drive box, a telescopic component provided on one side of the arm bracket, a lifting cylinder provided on the telescopic component, a hollow block fixedly connected to the output end of the lifting cylinder, two clamping plates slidably fitted to the inner wall of the hollow block, and a drive component that cooperates with the arm bracket provided on the lower side of the inner wall of the drive box;

[0007] One of the two clamping plates has an assembly opening on one side. A detection box is fixedly connected to the inner wall of the assembly opening. A pressure sensor is fixedly connected to one side of the inner wall of the detection box. A compression plate is fixedly connected to one side of the pressure sensor. A spring is fixedly connected to one side of the compression plate. A force-receiving block that slides with the detection box is fixedly connected to one end of the spring. A tightening plate is fixed to the force-receiving block and the other clamping plate on the adjacent side. A tightening component is provided on the inner wall of the empty slot block.

[0008] According to the above technical solution, the telescopic component includes a hidden groove formed on one side of the arm support, an electric telescopic cylinder fixedly connected to the inner wall of the hidden groove, a telescopic block fixedly connected to the output end of the electric telescopic cylinder, and an installation port formed on the telescopic block and fixedly connected to the lifting cylinder.

[0009] According to the above technical solution, the driving assembly includes a driving motor fixedly connected to the inner wall of the driving box, a driving gear fixedly connected to the output end of the driving motor, and a driven gear fixedly connected to the arm bracket and meshing with the driving gear.

[0010] According to the above technical solution, the robotic arm for an injection molding machine according to the claim is characterized in that: the tightening assembly includes a bidirectional lead screw fixedly connected to the inner wall of the empty slot block, a tightening motor fixedly connected to one side of the empty slot block and cooperating with the bidirectional lead screw, two clamping plates threadedly cooperating with the outside of the bidirectional lead screw, and the tightening motor cooperating with the pressure sensor.

[0011] According to the above technical solution, an annular groove is provided on the upper side of the mounting base, and a guide rod that cooperates with the annular groove is fixedly connected to the upper side of the inner wall of the arm bracket.

[0012] According to the above technical solution, soft pads are fixedly connected to the adjacent sides of the two tightening plates.

[0013] According to the above technical solution, guide openings are provided on both sides of the detection box, and two guide blocks that cooperate with the guide openings are fixedly connected to both sides of the force-bearing block.

[0014] Compared with the prior art, the beneficial effects achieved by this utility model are as follows: This utility model, by setting up a tightening component, a tightening plate, a pressure sensor, a spring, and a force-bearing block, can realize that when the product is clamped, the tightening plate squeezes the force-bearing block, and the force-bearing block is transmitted to the pressure sensor through the spring. The pressure generated by the pressure sensor is connected to the tightening component, which can provide real-time feedback of the pressure during the clamping process to the controller. Based on the feedback information, the rotation of the bidirectional lead screw is precisely adjusted, and the clamping force of the two clamping plates is dynamically adjusted. This effectively avoids the situation where the product is damaged due to excessive clamping force or the product is not firmly clamped due to insufficient clamping force, improves the adaptability of clamping force for different injection molded products, and improves the quality of product operation. Attached Figure Description

[0015] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0017] Figure 2 This is a schematic diagram of the overall three-dimensional cross-sectional structure of this utility model;

[0018] Figure 3 This is a three-dimensional structural diagram of the hollow slot block of this utility model;

[0019] Figure 4 This is a three-dimensional cross-sectional structural diagram of the detector box of this utility model;

[0020] Figure 5 This is the utility model Figure 4 Enlarged structural diagram at point A in the middle;

[0021] In the diagram: 1. Mounting base; 2. Drive box; 3. Arm support; 4. Telescopic assembly; 5. Lifting cylinder; 401. Hidden slot; 402. Electric telescopic cylinder; 403. Telescopic block; 404. Mounting port; 5. Lifting cylinder; 6. Empty slot block; 7. Clamping plate; 8. Drive assembly; 801. Drive motor; 802. Drive gear; 803. Driven gear; 9. Assembly port; 10. Detector box; 11. Pressure sensor; 12. Extrusion plate; 13. Spring; 14. Force block; 15. Tensioning plate; 16. Tensioning assembly; 161. Two-way lead screw; 162. Tensioning motor; 17. Annular rail groove; 18. Guide rod; 19. Soft pad; 20. Guide port; 21. Guide block. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] Please see Figure 1-5 The present invention provides a technical solution: a robotic arm for an injection molding machine, including a mounting base 1, a drive box 2 fixedly connected to the upper side of the mounting base 1, an arm bracket 3 rotatably fitted to the lower side of the inner wall of the drive box 2, a telescopic component 4 provided on one side of the arm bracket 3, a lifting cylinder 5 provided on the telescopic component 4, a hollow slot block 6 fixedly connected to the output end of the lifting cylinder 5, two clamping plates 7 slidably fitted to the inner wall of the hollow slot block 6, and a drive component 8 that cooperates with the arm bracket 3 provided on the lower side of the inner wall of the drive box 2;

[0024] One of the two clamping plates 7 has an assembly port 9 on one side. A probe box 10 is fixedly connected to the inner wall of the assembly port 9. A pressure sensor 11 is fixedly connected to one side of the inner wall of the probe box 10. The pressure sensor 11 is a device that can sense pressure signals and convert pressure signals into usable output electrical signals according to a certain rule. This is existing technology. A compression plate 12 is fixedly connected to one side of the pressure sensor 11. A spring 13 is fixedly connected to one side of the compression plate 12. A force-receiving block 14 that slides with the probe box 10 is fixedly connected to one end of the spring 13. A tightening plate 15 is fixedly fixed to the force-receiving block 14 and the other clamping plate 7 on the same side. A tightening component 16 is provided on the inner wall of the empty slot block 6.

[0025] Please see Figure 2 The telescopic assembly 4 includes a hidden groove 401 on one side of the arm support 3, an electric telescopic cylinder 402 fixedly connected to the inner wall of the hidden groove 401, a telescopic block 403 fixedly connected to the output end of the electric telescopic cylinder 402, and an installation port 404 on the telescopic block 403 and fixedly connected to the lifting cylinder 5. The electric telescopic cylinder 402 pushes the telescopic block 403 to move inside the arm support 3, thereby adjusting the position of the clamping plate 7.

[0026] Please see Figure 2 The drive assembly 8 includes a drive motor 801 fixedly connected to the inner wall of the drive box 2, a drive gear 802 fixedly connected to the output end of the drive motor 801, and a driven gear 803 fixedly connected to the arm support 3 and meshing with the drive gear 802. The drive motor 801 drives the drive gear 802 to rotate, which in turn drives the driven gear 803 and the arm support 3 to rotate, thereby adjusting the angle of the clamping plate 7.

[0027] Please see Figure 3 The tightening assembly 16 includes a bidirectional lead screw 161 fixedly connected to the inner wall of the empty slot block 6, a tightening motor 162 fixedly connected to one side of the empty slot block 6 and cooperating with the bidirectional lead screw 161, two clamping plates 7 threadedly engaged with the outer side of the bidirectional lead screw 161, and the tightening motor 162 cooperating with the pressure sensor 11. The tightening motor 162 drives the bidirectional lead screw 161 to rotate, causing the bidirectional lead screw 161 to drive the two clamping plates 7 to move closer together, thereby realizing the clamping command. The tightening motor 162 can be connected to the pressure sensor 11 through a control device, and the start and stop of the tightening motor 162 can be controlled by receiving the pressure generated by the pressure sensor 11.

[0028] Please see Figure 2 The upper side of the mounting base 1 is provided with an annular rail groove 17. The upper side of the inner wall of the arm bracket 3 is fixedly connected with a guide rod 18 that cooperates with the annular rail groove 17. When the arm bracket 3 is rotated, the annular rail groove 17 rotates inside the corresponding guide rod 18, which can support the lower side of the arm bracket 3 and improve the stability of the arm bracket 3 when rotating.

[0029] Please see Figure 3 Each of the two tightening plates 15 has a soft pad 19 fixedly connected to one of its adjacent sides. When the tightening plates 15 clamp the product, the soft pad 19 can act as a medium between itself and the product to protect it.

[0030] Please see Figure 3 The detector box 10 has guide openings 20 on both sides. The force block 14 has two guide blocks 21 that cooperate with the guide openings 20 on both sides. When the force block 14 is squeezed, the guide blocks 21 will slide inside the guide openings 20, which improves the stability of the force block 14 when it moves to a certain extent.

[0031] The implementation principle of this application is as follows: When in use, the drive motor 801 first drives the active gear 802 to rotate, and then the active gear 802 drives the driven gear 803 to rotate, thereby adjusting the angle of the arm support 3. Then, the electric telescopic cylinder 402 pushes the telescopic block 403 to move, thereby adjusting the position of the clamping plate 7. The extension and retraction of the lifting cylinder 5 changes the up and down position of the clamping plate 7, thereby enabling the clamping of the parts produced by the injection molding machine and moving them from the corresponding position to the designated position.

[0032] When clamping is required, the tightening motor 162 can be started to drive the bidirectional lead screw 161 to rotate. The threads on the bidirectional lead screw 161 drive the two clamping plates 7 to move towards each other to clamp the product produced by the injection molding machine. During the clamping process, the tightening plate 15 will compress the force block 14. Then, the reaction force generated by the force block 14 will compress the spring 13 inside the detector box 10. The other end of the spring 13 will compress the extrusion plate 12, thereby transmitting the pressure generated to the pressure sensor 11. The pressure sensor 11 is then connected to the bidirectional lead screw 161 through a controller, which can ensure that the clamping force of the product can be accurately controlled during the clamping process. This can not only firmly clamp the product and prevent it from falling, but also prevent damage to the product due to excessive clamping force, effectively improving the adaptability to different injection molded products and improving product quality.

[0033] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0034] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A robot for injection molding machines, comprising a mounting base (1), characterized in that: The upper side of mounting seat (1) is fixedly connected with drive box (2), the lower side of inner wall of drive box (2) is rotatably connected with arm support (3), one side of arm support (3) is provided with telescopic assembly (4), lifting cylinder (5) is arranged on telescopic assembly (4), the output end of lifting cylinder (5) is fixedly connected with empty groove block (6), the inner wall of empty groove block (6) is slidably connected with two clamping plates (7), the lower side of inner wall of drive box (2) is provided with drive assembly (8) matched with arm support (3). One side of one of two clamping plates (7) is provided with assembling opening (9), the inner wall of assembling opening (9) is fixedly connected with detection box (10), the inner wall of detection box (10) is fixedly connected with pressure sensor (11) on one side, one side of pressure sensor (11) is fixedly connected with extrusion piece (12), one side of extrusion piece (12) is fixedly connected with spring (13), one end of spring (13) is fixedly connected with force block (14) slidably connected with detection box (10), the side close to the other of two clamping plates (7) is fixedly connected with tightening plate (15), the inner wall of empty groove block (6) is provided with tightening assembly (16).

2. A robot for an injection molding machine according to claim 1, characterized in that: The telescopic assembly (4) includes a hidden groove (401) formed in one side of the arm support (3), an electric telescopic cylinder (402) fixedly connected to the inner wall of the hidden groove (401), a telescopic block (403) fixedly connected to the output end of the electric telescopic cylinder (402), and a mounting opening (404) formed in the telescopic block (403) and fixedly connected with the lifting cylinder (5).

3. A robot for injection molding machines according to claim 1, characterized in that it is characterized by the fact that: The drive assembly (8) includes a drive motor (801) fixedly connected to the inner wall of the drive box (2), a driving gear (802) fixedly connected to the output end of the drive motor (801), and a driven gear (803) fixedly connected to the arm support (3) and engaged with the driving gear (802).

4. The robot for an injection molding machine according to claim 1, wherein: The tightening assembly (16) includes a bidirectional screw rod (161) fixedly connected to the inner wall of the empty groove block (6), a tightening motor (162) fixedly connected to one side of the empty groove block (6) and matched with the bidirectional screw rod (161), and two clamping plates (7) threadedly connected to the outer side of the bidirectional screw rod (161), wherein the tightening motor (162) is matched with the pressure sensor (11).

5. The robot for an injection molding machine according to claim 1, wherein: The upper side of the mounting seat (1) is provided with an annular rail groove (17), and the upper side of the inner wall of the arm support (3) is fixedly connected with a guide rod (18) matched with the annular rail groove (17).

6. A robot for an injection molding machine according to claim 1 wherein: The sides close to each other of the two tightening plates (15) are fixedly connected with soft pads (19).

7. The robot for an injection molding machine according to claim 1, wherein: The two sides of the detection box (10) are provided with guide openings (20), and the two sides of the force block (14) are fixedly connected with two guide blocks (21) matched with the guide openings (20).

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