Anti-collision structure of injection molding machine mechanical arm

Abstract

The utility model relates to injection molding machine mechanical hand technical field, especially injection molding machine mechanical hand's anti -collision structure, including fixed base, mounting block, energy -absorbing cylinder, cross bar, leaf spring, buffer plate and tension spring etc.

Description

Technical Field

[0001] This utility model relates to the field of injection molding machine robot technology, and in particular to an anti-collision structure for injection molding machine robot. Background Technology

[0002] Injection molding robots are automated part-retrieving devices specifically designed for injection molding production lines. Primarily installed on injection molding machines, they automatically remove molded plastic products from the mold and perform operations such as placement, stacking, insert insertion, or transfer to subsequent processes. Their core structure includes a drive system, arm body, gripping fixture, and control system, featuring high repeatability, stable operation, and rapid response.

[0003] In automated injection molding production, injection robots serve as crucial component handling and insert execution units, requiring their movement to be highly coordinated with mold opening and closing, ejection mechanisms, and surrounding equipment. However, in practical applications, robots frequently experience unexpected collisions with molds, injection molding machine templates, product sprues, or even their own structures due to factors such as improper path planning, sensor response delays, mold status misjudgments, or equipment aging. Such collisions can lead to robot arm deformation, fixture damage, or servo motor overload alarms, and may also scratch mold cavities, crush freshly demolded plastic products, and in severe cases, even cause equipment shutdowns and production line interruptions, resulting in significant economic losses and safety hazards.

[0004] Therefore, it is necessary to design an anti-collision structure for injection molding machine robots to solve the above-mentioned technical problems. Utility Model Content

[0005] To overcome the shortcomings of injection molding robots, which often collide with molds, templates, material heads, or themselves due to improper path planning, sensor delays, misjudgment of mold status, or equipment aging, resulting in component damage, product scrapping, or even machine shutdown and production stoppage, leading to economic losses and safety risks, this utility model provides an anti-collision structure for injection molding robot arms.

[0006] The technical solution of this utility model is: an anti-collision structure for an injection molding machine robot, including a fixed base, mounting blocks, energy-absorbing cylinders, crossbars, leaf springs, buffer plates, and tension springs. The robot body is provided with a gripping part, and a fixed base is fixedly sleeved on the outside of the gripping part. Mounting blocks are symmetrically fixedly connected to both sides of the top of the fixed base. The mounting blocks are fixedly connected to the gripping part. Two sets of energy-absorbing cylinders are fixedly connected to both sides of the fixed base. A crossbar is fixedly connected between the side of each set of multiple energy-absorbing cylinders away from the fixed base. Leaf springs are slidably connected to the front of multiple crossbars. Buffer plates are fixedly connected between two leaf springs on the same side. Two tension springs are connected between the two ends of each leaf spring that pass through the corresponding crossbar.

[0007] Furthermore, both buffer plates are made of soft material.

[0008] Furthermore, it also includes limit seats and moving rods. Two limit seats are fixedly connected to one side of each crossbar, and a moving rod is slidably connected between the two limit seats on each crossbar. The moving rod is fixedly connected to the middle of the leaf spring.

[0009] Furthermore, it also includes sleeves, sliding rods, and compression springs. Each crossbar is fixedly connected to a sleeve, and each sleeve is slidably connected to a sliding rod. Each sliding rod is connected to a corresponding sleeve with a compression spring, and each compression spring is located inside the corresponding sleeve.

[0010] Furthermore, each sleeve is located between two corresponding limit seats.

[0011] Furthermore, it also includes a trigger rod, a support block, a trigger button, and a light alarm. The bottom of the two moving rods on one side is fixedly connected to the trigger rod, the bottom of the two crossbars on one side is fixedly connected to the support block, and a trigger button is fixedly connected to one side of each support block. The two trigger rods abut against the corresponding trigger buttons. Light alarms are fixedly connected to both sides of the right side of the fixed base, and the two trigger buttons are electrically connected to the corresponding light alarms.

[0012] The beneficial effects are as follows: This utility model absorbs the impact force step by step through the soft buffer plate, the leaf spring deformation, the tension spring extension, the energy absorption cylinder deformation, and the compression spring compression, which significantly reduces the instantaneous impact load. At the same time, the light alarm is triggered by the pure mechanical contact between the trigger rod and the trigger button, realizing instant warning without power supply. The pure mechanical solution achieves the effects of reducing collision damage, shortening recovery time, and reducing maintenance costs through multi-stage energy absorption. Attached Figure Description

[0013] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0014] Figure 2 This is a three-dimensional structural diagram of the components of this utility model, including the fixing base, mounting block, and energy-absorbing cylinder.

[0015] Figure 3 This is a three-dimensional structural diagram of the crossbar, leaf spring, and buffer plate components of this utility model.

[0016] Figure 4 This is a three-dimensional structural diagram of the crossbar, leaf spring, and tension spring components of this utility model.

[0017] Figure 5 This is a three-dimensional structural diagram of the limiting seat, moving rod, and sleeve components of this utility model.

[0018] Figure 6 This is a three-dimensional structural diagram of the sleeve, slide bar, and compression spring components of this utility model.

[0019] Figure 7 This is a three-dimensional structural diagram of the mounting block, energy-absorbing cylinder, and crossbar components of this utility model.

[0020] In the attached diagram, the following labels are used: 1_fixed base, 101_robotic arm body, 102_gripping part, 2_mounting block, 3_energy absorption cylinder, 4_crossbar, 5_leaf spring, 6_buffer plate, 7_tension spring, 8_limiting seat, 9_moving rod, 10_sleeve, 11_trigger rod, 12_support block, 13_trigger button, 14_light alarm, 15_slide rod, 16_compression spring. Detailed Implementation

[0021] Example: A collision avoidance structure for an injection molding machine robot, such as... Figures 1-7 As shown, the robot includes a fixed base 1, mounting block 2, energy-absorbing cylinder 3, crossbar 4, leaf spring 5, buffer plate 6, tension spring 7, limit seat 8, moving rod 9, sleeve 10, slide rod 15, compression spring 16, trigger rod 11, support block 12, trigger button 13, and light alarm 14. The robot body 101 has a gripping part 102, with the fixed base 1 fixedly mounted on its outer side. Mounting blocks 2 are symmetrically welded to the front and rear sides of the top of the fixed base 1. The mounting blocks 2 are installed to the gripping part 102 with screws. Two sets of energy-absorbing cylinders 3 are mounted on the front and rear sides of the fixed base 1 with screws. Each set of energy-absorbing cylinders 3 consists of two cylinders. A crossbar 4 is mounted between the two energy-absorbing cylinders 3 on the side furthest from the fixed base 1 in each set with screws. Leaf springs 5 ​​are slidably connected to the front of the four crossbars 4. Buffer plates 6 are fixedly connected between two leaf springs 5 ​​on the same front and rear sides. Both buffer plates 6 are made of soft material. Two tension springs are connected between the two ends of each leaf spring 5, which are inserted into the corresponding crossbar 4. 7. Two limiting seats 8 are welded to the side of each crossbar 4 away from the fixed seat 1. A moving rod 9 is slidably connected between the two limiting seats 8 on each crossbar 4. The moving rod 9 is welded to the middle of the leaf spring 5. A sleeve 10 is welded to each crossbar 4. Each sleeve 10 is located between the corresponding two limiting seats 8. A sliding rod 15 is slidably connected inside each sleeve 10. A compression spring 16 is connected between each sliding rod 15 and the corresponding sleeve 10. Each compression spring 16 is located inside the corresponding sleeve 10. A trigger rod 11 is fixedly connected to the bottom side of the two moving rods 9 on the lower side. A support block 12 is fixedly connected to the bottom side of the two crossbars 4 on the lower side. A trigger button 13 is installed on the side of the two support blocks 12 away from each other by screws. The two trigger rods 11 abut against the corresponding trigger button 13. Light alarms 14 are installed on the front and rear sides of the right side of the fixed seat 1 by screws. The two trigger buttons 13 are electrically connected to the corresponding light alarms 14.

[0022] When the injection molding machine robot body 101 is working normally, the anti-collision structure installed on the outside of its gripping part 102 is in standby mode. The fixed seat 1 is firmly connected to the gripping part 102 through the mounting block 2, forming the basic support of the anti-collision system. The four sets of energy-absorbing cylinders 3 and their connected crossbars 4 form a complete protective frame around the gripping part 102. The leaf spring 5 and the buffer plate 6 form the outermost collision contact surface. At this time, the leaf spring 5 remains stable under the balancing action of the tension springs 7 on both sides. The moving rod 9 is in the middle position under the constraint of the limit seat 8. The sliding rod 15 inside the sleeve 10 is compressed. When spring 16 is extended, and the robot arm 101 experiences an accidental collision, the impacting object first contacts the buffer plate 6. The buffer plate 6 transmits the impact force to the connected leaf spring 5, causing the leaf spring 5 to undergo elastic deformation. Simultaneously, the leaf spring 5 drives the moving rod 9 to slide between the limit seats 8. This movement causes the tension springs 7 connected to both ends of the leaf spring 5 to extend, absorbing some of the impact energy. As the impact force continues, the leaf spring 5 further pushes the moving rod 9, which in turn pushes the sliding rod 15 to slide within the sleeve 10, compressing the compression spring 16 within the sleeve 10. A second-level buffer is formed. During this process, the energy-absorbing cylinder 3 also absorbs and disperses the impact energy through its own deformation characteristics, forming a multi-level protection system. If the collision force is large, causing the two moving rods 9 located on the lower side to displace to a set threshold, the trigger rod 11 will move accordingly and abut against and press the trigger button 13 on the support block 12. After the trigger button 13 is pressed, it immediately sends a signal to the light alarm 14, which then issues a visual warning to remind the operator to intervene in time. The entire collision response process is achieved entirely through a mechanical structure, with a rapid and reliable response and collision resolution. Afterwards, the compressed spring 16 releases energy, pushing the slide bar 15 to slide outwards and reset within the sleeve 10. At the same time, the stretched tension spring 7 begins to contract, causing the leaf spring 5 to return to its original shape. Under the combined action of the tension spring 7 and the compression spring 16, the moving rod 9 slowly slides back to its initial position. When the moving rod 9 returns to its original position, the trigger rod 11 separates from the trigger button 13, the trigger button 13 resets, the light alarm 14 stops alarming, the leaf spring 5 and the buffer plate 6 return to their initial state, and the entire anti-collision system completes its reset, ready to deal with the next possible collision.

Claims

1. A collision avoidance structure for an injection molding machine robot, characterized in that: The robot includes a fixed base (1), mounting block (2), energy-absorbing cylinder (3), crossbar (4), leaf spring (5), buffer plate (6) and tension spring (7). The robot body (101) is provided with a gripping part (102). The gripping part (102) is fixedly fitted with a fixed base (1). Mounting blocks (2) are symmetrically fixedly connected to both sides of the top of the fixed base (1). The mounting blocks (2) are fixedly connected to the gripping part (102). Two sets of energy-absorbing cylinders (3) are fixedly connected to both sides of the fixed base (1). A crossbar (4) is fixedly connected between the side of each set of multiple energy-absorbing cylinders (3) away from the fixed base (1). Leaf springs (5) are slidably connected to the front of multiple crossbars (4). A buffer plate (6) is fixedly connected between two leaf springs (5) on the same side. Two tension springs (7) are connected between the two ends of each leaf spring (5) through the corresponding crossbar (4).

2. The anti-collision structure for an injection molding machine robot according to claim 1, characterized in that: Both buffer plates (6) are made of soft material.

3. The anti-collision structure for an injection molding machine robot according to claim 2, characterized in that: It also includes a limit seat (8) and a moving rod (9). Two limit seats (8) are fixedly connected to one side of each crossbar (4). A moving rod (9) is slidably connected between the two limit seats (8) on each crossbar (4). The moving rod (9) is fixedly connected to the middle of the leaf spring (5).

4. The anti-collision structure for an injection molding machine robot according to claim 3, characterized in that: It also includes a sleeve (10), a slide bar (15) and a compression spring (16). Each crossbar (4) is fixedly connected to a sleeve (10), and each sleeve (10) is slidably connected to a slide bar (15). Each slide bar (15) is connected to a corresponding sleeve (10) with a compression spring (16). Each compression spring (16) is located inside the corresponding sleeve (10).

5. The anti-collision structure for an injection molding machine robot according to claim 4, characterized in that: Each sleeve (10) is located between the two corresponding limit seats (8).

6. The anti-collision structure for an injection molding machine robot according to claim 5, characterized in that: It also includes a trigger rod (11), a support block (12), a trigger button (13) and a light alarm (14). The bottom of the two moving rods (9) on one side is fixedly connected to the trigger rod (11), the bottom of the two crossbars (4) on one side is fixedly connected to the support block (12), the two support blocks (12) are fixedly connected to one side, the two trigger rods (11) are in contact with the corresponding trigger button (13), the right side of the fixed base (1) is fixedly connected to the light alarm (14), and the two trigger buttons (13) are electrically connected to the corresponding light alarm (14).

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