Injection product clamping and rotating mechanism with robot joint motor

Abstract

The utility model provides an injection molding product clamping and rotating mechanism with a robot joint motor, and relates to the technical field of injection molding machine manipulators. Comprising a motor fixing plate, a robot joint motor, a rotating plate and a mechanical arm. Wherein the robot joint motor is connected to the mechanical arm through the motor fixing plate; the rotating plate is suitable for being connected with a clamping mechanism; the mechanical arm joint motor is connected with the rotating plate so as to drive the rotating plate and the clamping mechanism connected to the rotating plate to rotate.

Description

Technical Field

[0001] This utility model relates to the field of injection molding machine robotic arms, and more specifically, to an injection molding product gripping and rotating mechanism with a robot joint motor. Background Technology

[0002] In the injection molding industry, robotic arms are widely used for gripping and rotating injection molded products to achieve efficient and automated production processes. However, existing injection molding machine robotic arm gripping and rotating mechanisms have significant technical flaws. Currently, the market commonly uses a combination of a common motor 2' and a reducer 1' to drive the gripping and rotating mechanism, resulting in an overall length that is too long for the gripping mechanism. For example, as... Figure 1 As shown, in the existing equipment, the length of motor 2' reaches 85mm, the forward protrusion distance of chamfered L-plate 5' is about 67mm, the tail of motor 2' protrudes about 25mm from the end face of robotic arm 4', and the distance from the tail of motor to the end face of rotating plate 3' reaches 141.5mm. For small injection molding machines, due to the limited mold thickness, robotic arm 4' has difficulty descending to the mold position to complete the clamping operation, which greatly limits the application range and production efficiency of small injection molding machines. In addition, the existing clamping and rotating mechanism is prone to damage to the motor or mold due to collisions during operation, further increasing equipment maintenance costs and production risks. Utility Model Content

[0003] This utility model discloses an injection molding product gripping and rotating mechanism with a robot joint motor, which aims to solve the problems of excessive total length, insufficient mold thickness in small injection molding machines, and easy collision between the motor and the mold during the gripping process in existing injection molding machine robotic gripping and rotating mechanisms.

[0004] The present invention adopts the following solution:

[0005] A clamping and rotating mechanism for injection molded products with a robot joint motor includes a motor mounting plate, a robot joint motor, a rotating plate, and a robotic arm; wherein the robot joint motor is connected to the robotic arm via the motor mounting plate; the rotating plate is adapted to connect a clamping mechanism; the robotic arm joint motor is connected to the rotating plate to drive the rotating plate and the clamping mechanism connected to the rotating plate to rotate.

[0006] Furthermore, the motor mounting plate is provided with a chamfered L-block connection, and the chamfered L-block is movably connected to the robotic arm through a gear and rack structure.

[0007] Furthermore, the gear and rack structure includes a gear and a rack, wherein the gear is rotatably connected to the robotic arm and fixed to the chamfered L-block, and the rack is telescopically mounted on the robotic arm. The robotic arm drives the rack to extend and retract, thereby driving the gear to rotate. The rotation of the gear drives the chamfered L-block and the motor mounting plate to rotate.

[0008] Furthermore, the distance a between the end face of the rotating plate facing the clamping mechanism and the end face of the chamfered L block facing the rotating plate is ≤29mm.

[0009] Furthermore, the end face of the robot joint motor facing the robotic arm does not extend beyond the end face of the robotic arm on the side away from the gripping mechanism.

[0010] Furthermore, the distance b between the end face of the robotic arm away from the motor fixing plate and the end face of the rotating plate away from the robotic arm is ≤ 108.5mm.

[0011] Beneficial effects:

[0012] This solution securely mounts the robot joint motor to the robotic arm using a motor mounting plate, ensuring stability during operation. The robot joint motor directly replaces traditional motors and reducers, eliminating any extra protrusion at the tail, thus saving space and reducing overall length. The rotating plate connects to the robot joint motor's output, driving the gripping mechanism to rotate the injection-molded product, achieving both gripping and rotation functions. Furthermore, the distance a from the end face of the rotating plate facing the gripping mechanism to the end face of the chamfered L-block facing the rotating plate is ≤29mm, a reduction of 38mm compared to existing technologies, effectively lowering the overall length of the gripping mechanism. The distance b from the end face of the robotic arm away from the motor mounting plate to the end face of the rotating plate away from the robotic arm is ≤108.5mm, optimizing the overall structural compactness. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of an existing injection molding product clamping and rotating mechanism with a motor and a reducer;

[0014] Figure 2 This is a schematic diagram of the structure of an injection-molded product gripping and rotating mechanism with a robot joint motor in this embodiment;

[0015] Figure 3 This is a front view schematic diagram of an injection molding product gripping and rotating mechanism with a robot joint motor in this embodiment.

[0016] Reference numerals: 1. Motor mounting plate; 2. Robot joint motor; 3. Rotating plate; 4. Robotic arm; 5. Chamfered L-block. Detailed Implementation

[0017] In existing technologies, injection molding commonly uses a combination of a conventional motor and a reducer to drive the clamping and rotating mechanism. This traditional structure requires an additional reducer as a transmission component, resulting in an excessively large axial dimension of the drive system. When applied to small injection molding machines with limited mold thickness, the excessively long robotic arm structure struggles to descend to the mold position to complete the part removal operation. Furthermore, the multi-component combination structure is prone to collisions in confined spaces, affecting equipment reliability.

[0018] To address the aforementioned issues, it was first observed that the reducer, as an independent transmission component, significantly increased the structural length. The possibility of eliminating the space occupied by the reducer through integrated design of the drive components was then considered. Further research revealed that the robot's joint motor 2 possesses a built-in reduction mechanism and high torque output, enabling it to directly drive the actuators. Based on this, the core idea was to replace the traditional motor-reducer combination with an integrated joint motor, shortening the power transmission path through direct drive, while simultaneously optimizing the connection structure between the robotic arm 4 and the drive components.

[0019] Combination Figure 2 and Figure 3 As shown, this embodiment provides a gripping and rotating mechanism for injection-molded products with a robot joint motor, including a motor mounting plate 1, a robot joint motor 2, a rotating plate 3, and a gripping and rotating mechanism for a robotic arm 4. The robot joint motor 2 is connected to the robotic arm 4 via the motor mounting plate 1, and the rotating plate 3 is connected to the gripping mechanism. The joint motor of the robotic arm 4 directly drives the rotating plate 3 and the gripping mechanism to rotate.

[0020] The motor mounting plate 1 is a plate-shaped component connecting the robot joint motor 2 and the robotic arm 4. It can be made of aluminum alloy and serves as a stable mounting surface for the motor, while also acting as a transitional connector between the robotic arm 4 and the drive components. The robot joint motor 2 is a servo drive device with an integrated reduction mechanism. It can be a harmonic reduction type joint motor or other similar existing joint motors. Its function is to output high torque through the built-in reduction mechanism to directly drive the rotating plate 3. The rotating plate 3 is a plate-shaped component supporting the gripping mechanism. It can be made of laser-cut steel plate and transmits the motor driving force to the gripping mechanism while maintaining the accuracy of the rotational plane. The robotic arm 4 is the main frame supporting the drive components and the actuator. It can be made of welded profiles and provides rigid support for the overall mechanism, defining the motion trajectory. The gripping mechanism can utilize existing gripping devices depending on the product being gripped; details are omitted here.

[0021] Specifically, the motor mounting plate 1 serves as a connecting carrier, fixing the robot joint motor 2 to the front end of the robotic arm 4, eliminating the need for the independent installation space of a traditional reducer. The output shaft of the robot joint motor 2 is directly connected to the rotating plate 3, driving the rotating plate 3 to perform rotational movements through a built-in reduction mechanism. The gripping mechanism is installed at the end of the rotating plate 3, rotating synchronously with the rotating plate 3 to complete product gripping and orientation adjustment. The robotic arm 4, as an integral support structure, has its length shortened by eliminating the reducer mounting position. The direct connection design between the drive components and the actuator minimizes the power transmission path, requiring only the thickness of the motor body and the rotating plate 3 in the axial space.

[0022] Compared to existing technologies, traditional solutions use separate motors and reducers, requiring reserved installation space and transmission connection clearances. This solution replaces the separate drive unit with the robot joint motor 2, eliminating the need for a separate reducer mounting location and connecting components. In traditional structures, the motor tail protrudes from the end face of the robotic arm 4; this solution, through integrated design, ensures that the motor end face is flush with or located inside the robotic arm 4. Traditional rotary drive systems include multiple components such as motors, reducers, and couplings; this solution only requires a direct connection between the joint motor and the rotating plate 3, reducing the number of components and compressing the axial stacking length.

[0023] Through the above technical solution, this application effectively shortens the overall axial dimension of the clamping and rotating mechanism, enabling it to adapt to the mold thickness limitations of small injection molding machines. The integrated design of the drive component and the actuator reduces assembly errors of multiple components and minimizes the risk of collisions caused by structural loosening during movement. The direct drive method simplifies the power transmission path, improves system response speed and positioning accuracy, and meets the rapid part removal requirements of precision injection molded products.

[0024] This application further proposes that a chamfered L-block 5 is provided on the motor mounting plate 1, and the chamfered L-block 5 is movably connected to the robotic arm 4 via a gear and rack structure. The gear and rack structure includes a gear and a rack, wherein the gear is rotatably connected to the robotic arm 4, and the chamfered L-block 5 is fixed to the tooth line of the gear. The rack is retractably mounted on the robotic arm 4, and the robotic arm 4 drives the rack to extend and retract. Specifically, the robotic arm 4 can drive the rack to extend and retract via a cylinder to drive the gear to rotate, and the gear rotation drives the chamfered L-block 5 and the motor mounting plate 1 to rotate.

[0025] Among them, the chamfered L-block 5 refers to an L-shaped connecting component with chamfered edges, which can be machined from aluminum alloy. The chamfered structure eliminates interference from right-angled edges and reduces the space occupied by the connecting components. The gear and rack structure refers to the transmission achieved through the meshing of gears and racks. Specifically, it can be achieved by using involute gears with a module of 0.8-1.2 and a spur rack. The rack can be linearly adjusted along the gear axis. The gear and rack structure, in conjunction with the drive motor, enables the clamping mechanism to rotate on the robotic arm 4.

[0026] This application further proposes controlling the distance between the end face of the rotating plate 3 facing the clamping mechanism and the end face of the chamfered L block 5 facing the rotating plate 3 within a set range. The end face of the rotating plate 3 facing the clamping mechanism refers to the end surface of the rotating plate 3 directly connected to the clamping mechanism. Specifically, it can be made into a flat reference surface using a planar machining process. This reference surface is used to determine the relative spatial relationship between the installation position of the clamping mechanism and the rotating plate 3. By setting this reference surface, the axial installation distance between the rotating plate 3 and the clamping mechanism can be precisely controlled.

[0027] The end face of the chamfered L-block 5 facing the rotating plate 3 refers to the surface of the chamfered L-block 5 that is adjacent to and parallel to the rotating plate 3. Specifically, it can be milled to form an assembly surface with a perpendicularity error of less than 0.05 mm. This end face serves as the spatial positioning reference between the chamfered L-block 5 and the rotating plate 3. By limiting the distance between this end face and the end face of the rotating plate 3, the axial distribution range of the transmission components can be effectively constrained. Specifically, the axial space compression is achieved by setting an upper limit value for the end face distance between the rotating plate 3 and the chamfered L-block 5. When this distance is controlled within a specific range, the assembly space between the rotating plate 3 and the chamfered L-block 5 is optimized to retain only the necessary transmission clearance, thereby eliminating the axial dimension accumulation caused by redundant assembly space in traditional structures. Under this constraint, the power transmission path of the drive components is limited to a shorter axial range, resulting in a significant reduction in the overall length of the clamping mechanism. Compared with the prior art, the end face distance between the rotating plate 3 and the chamfered L-block 5 in existing clamping and rotating mechanisms generally exceeds the set threshold, resulting in a loose axial distribution of the transmission chain and an overall structure that cannot adapt to the mold thickness limitations of small injection molding machines. This solution, by strictly limiting this distance range, optimizes the layout of the transmission components into a compact axial arrangement, overcoming spatial limitations while ensuring power transmission efficiency. Specifically, the distance a between the end face of the rotating plate 3 facing the clamping mechanism and the end face of the chamfered L block 5 facing the rotating plate 3 is ≤29mm. This is achievable through optimized structural design, whereas in the prior art, the minimum distance is 67mm. Through the above technical solution, this application can effectively shorten the overall axial length of the clamping rotating mechanism, avoiding the problem of the robotic arm 4 being unable to descend to the mold position due to excessive structural length. At the same time, the compact layout reduces the risk of component collisions during movement, lowers equipment maintenance costs, and improves operational stability, making it suitable for use in small injection molding machines with narrow mold spaces.

[0028] This application further proposes that the end face of the robot joint motor 2 facing the robotic arm 4 does not extend beyond the end face of the robotic arm 4 away from the gripping mechanism. Compared with the prior art, in the existing solution, the motor tail protrudes from the end face of the robotic arm 4, resulting in an increase in the overall length of the gripping mechanism. However, this solution, through the use of the robot joint motor 2 and optimized structural design, allows the motor to be completely built into the inner side of the robotic arm 4 structure. This installation method not only eliminates the axial redundant space of traditional external motors but also avoids the risk of the motor housing contacting the mold during high-speed movement, making it particularly suitable for small injection molding machine applications with limited mold space.

[0029] This application further proposes that the distance b between the end face of the robotic arm 4 away from the motor mounting plate 1 and the end face of the rotating plate 3 away from the robotic arm 4 shall not exceed 108.5 mm.

[0030] In this design, the end face of the robotic arm 4 away from the motor mounting plate 1 refers to the outermost surface of the robotic arm 4 body in the opposite direction to the mounting position of the motor mounting plate 1. Similarly, the end face of the rotating plate 3 away from the robotic arm 4 refers to the outermost surface of the rotating plate 3 body in the opposite direction to the connecting end of the robotic arm 4. Thanks to the use of the robot joint motor 2 and the optimized structural design, the distance b between the end face of the robotic arm 4 away from the motor mounting plate 1 and the end face of the rotating plate 3 away from the robotic arm 4 can be ≤108.5mm, while the minimum in the prior art is 141.5mm. This solution improves the compactness of the end structure of the gripping mechanism while maintaining the rotary drive function, solving the problem that traditional structures cannot adapt to the mold thickness limitations of small injection molding machines. This solution effectively reduces the risk of motion interference of the robotic arm in narrow mold spaces, avoids collisions between the gripping mechanism and the mold or motor, and meets the stringent requirements of small injection molding machines for the size of the robotic arm's end effector, ensuring that the robotic arm can smoothly descend to the mold position to complete the gripping operation.

[0031] Compared with existing technologies, the distance between the end faces of the robotic arm 4 and the rotating plate 3 in traditional gripping and rotating mechanisms generally exceeds 141 mm, making it impossible to effectively avoid the mold closing area in small injection molding machines. This solution reduces this distance to less than 108.5 mm through a compact structural design, providing a larger lifting and lowering operating space for the gripping mechanism while maintaining the same load capacity.

[0032] Through the above technical solution, this application effectively solves the problem that the gripping mechanism cannot adapt to the working environment of small injection molding machines due to its excessively long longitudinal dimension, enabling the robot to complete the precise gripping operation of the mold surface under the condition of limited mold thickness, while avoiding the risk of interference and collision between the mechanical structure and the mold during equipment operation.

[0033] It should be understood that the above are only preferred embodiments of the present utility model, and the protection scope of the present utility model is not limited to the above embodiments. All technical solutions that fall within the scope of the present utility model are protected by the present utility model.

[0034] The accompanying drawings used in the above description of the embodiments only show some embodiments of the present invention and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

Claims

1. A clamping and rotating mechanism for injection-molded products with a robot joint motor, characterized in that, The device includes a motor mounting plate, a robot joint motor, a rotating plate, and a robotic arm; wherein the robot joint motor is connected to the robotic arm via the motor mounting plate; the rotating plate is adapted to connect a gripping mechanism; the robotic arm joint motor is connected to the rotating plate to drive the rotating plate and the gripping mechanism connected to the rotating plate to rotate.

2. The injection molding product gripping and rotating mechanism with robot joint motor according to claim 1, characterized in that, The motor mounting plate is provided with a chamfered L-block connection, and the chamfered L-block is movably connected to the robotic arm through a gear and rack structure.

3. The injection molding product gripping and rotating mechanism with robot joint motor according to claim 2, characterized in that, The gear and rack structure includes a gear and a rack. The gear is rotatably connected to the robotic arm and fixed to the chamfered L-block. The rack is telescopically mounted on the robotic arm. The robotic arm drives the rack to extend and retract, thereby driving the gear to rotate. The rotation of the gear drives the chamfered L-block and the motor mounting plate to rotate.

4. The injection molding product gripping and rotating mechanism with robot joint motor according to claim 2, characterized in that, The distance a between the end face of the rotating plate facing the clamping mechanism and the end face of the chamfered L block facing the rotating plate is ≤29mm.

5. The injection molding product gripping and rotating mechanism with robot joint motor according to claim 2, characterized in that, The end face of the robot joint motor facing the robotic arm does not extend beyond the end face of the robotic arm on the side away from the gripping mechanism.

6. The injection molding product gripping and rotating mechanism with robot joint motor according to claim 2, characterized in that, The distance b between the end face of the robotic arm away from the motor mounting plate and the end face of the rotating plate away from the robotic arm is ≤ 108.5 mm.

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