Automatic clamp with buffer structure and automatic clamping device
By introducing a buffer structure and control system into the automatic clamping fixture, the problems of low efficiency and impact load in traditional clamping methods are solved, achieving efficient and stable automatic clamping, and improving the accuracy of machining and the life of equipment.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- XINHUI PRECISE HARDWARE (HUIZHOU) CO LTD
- Filing Date
- 2025-07-25
- Publication Date
- 2026-07-07
AI Technical Summary
Traditional manual clamping methods are inefficient and inconsistent. Suction cup clamping is highly dependent on the surface quality of the workpiece, and cylinder-driven clamping lacks buffering, resulting in the direct transmission of impact loads, which affects positioning accuracy and equipment lifespan.
Design an automatic clamp with a buffer structure, including a connecting seat, a buffer mechanism, a clamping mechanism and a control system. The clamp absorbs impact energy through the elastic deformation of the spring, and achieves automatic clamping and loading by combining the cylinder-driven claw clamp and the control system, adapting to different working conditions.
It improves clamping efficiency and accuracy, reduces the labor intensity of workers, enhances the adaptability and stability of the clamping mechanism, protects equipment and workpieces, and extends the service life of key components.
Smart Images
Figure CN224464222U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of automated machine tool clamping technology, and in particular to an automatic clamping fixture and automatic clamping device with a buffer structure. Background Technology
[0002] In the development of the machining field, traditional manual clamping methods have demonstrated unique advantages in single-piece and small-batch production due to their flexibility and adaptability. However, with the development of automated production, their shortcomings of low efficiency and poor consistency have become increasingly prominent. To address this, suction cup clamping technology has emerged, achieving rapid clamping through vacuum adsorption. However, the adsorption effect of suction cups depends on the surface quality of the workpiece; the adsorption effect on workpieces with oil stains, roughness, or porous surfaces is not ideal, limiting its applicability.
[0003] To address these issues, some companies have introduced cylinder-driven grippers into clamping equipment. While this mechanical clamping method overcomes the surface dependence problem, the lack of cushioning means that impact loads generated during use are directly transmitted to the equipment body. This affects positioning accuracy, and long-term use can cause mechanical fatigue at the equipment's connection points, shortening the lifespan of critical components. Utility Model Content
[0004] The purpose of this application is to overcome the shortcomings of the prior art and provide an efficient, stable and flexible automatic clamp and automatic clamping device with a buffer structure.
[0005] The objective of this application is achieved through the following technical solution:
[0006] An automated gripper with a buffer structure includes:
[0007] A connector for connecting the actuator end of a robotic arm;
[0008] A buffer mechanism is provided, comprising an upper plate, a lower plate, a guide rod, and a spring. The upper plate is connected to the connecting seat, and the lower plate has a through hole. The upper plate and the lower plate are fixedly connected. One end of the guide rod is disposed on the upper plate, and the other end of the guide rod passes through the through hole. The spring is sleeved on the guide rod and abuts against the upper plate and the lower plate respectively.
[0009] A clamping mechanism, comprising a cylinder drive assembly and a plurality of claws, wherein the cylinder drive assembly is mounted on the side of the lower plate away from the connecting seat, each claw is connected to a drive shaft of the cylinder drive assembly, and the cylinder drive assembly corresponds to the spring;
[0010] The control system is electrically connected to the control terminals of the clamping mechanism and the robotic arm, respectively.
[0011] In one embodiment, the buffer mechanism further includes a connector, through which the upper plate and the lower plate are fixedly connected.
[0012] In one embodiment, the number of connectors is four, and the four connectors are respectively located at the four corners of the buffer mechanism.
[0013] In one embodiment, the number of guide rods and the number of springs are four, and the four guide rods are symmetrically arranged on both sides of the buffer mechanism.
[0014] In one embodiment, the upper plate has a threaded hole, the guide rod is disposed in the threaded hole, and the guide rod is threadedly connected to the upper plate.
[0015] In one embodiment, there are two clamping mechanisms, which are symmetrically arranged on the side of the lower plate opposite to the buffer mechanism.
[0016] In one embodiment, one end of the connector extends axially to form a mounting portion for connecting the actuator end of the robotic arm.
[0017] An automatic clamping device includes a robot arm, a controller, and an automatic clamp with a buffer structure as described in any of the above embodiments. The robot arm is mounted on one side of a machine tool. The automatic clamp with a buffer structure is connected to the actuator of the robot arm via a connecting seat. The control terminal of the control system of the automatic clamp with a buffer structure is electrically connected to the control terminal of the controller. The control terminal of the robot arm is electrically connected to the control terminal of the controller.
[0018] Compared with the prior art, this application has at least the following advantages:
[0019] 1. The aforementioned automatic clamp with a buffer structure has a buffer mechanism between the robotic arm execution end and the clamping mechanism. Through the elastic deformation of the preloaded spring, the impact energy during clamping and mounting is absorbed to avoid damage to the equipment or workpiece caused by collision.
[0020] 2. Automatic clamps with buffer structures control the opening and closing of the clamping mechanism through a control system, thereby achieving automatic clamping and mounting, improving clamping efficiency and accuracy, and reducing the labor intensity of workers. Simultaneously, symmetrically arranged cylinders drive the jaws to grip the workpiece, adapting to different working conditions and enhancing the adaptability and stability of the clamping mechanism. Attached Figure Description
[0021] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.
[0022] Figure 1 This is a schematic diagram of an automatic gripper with a buffer structure according to one embodiment;
[0023] Figure 2 for Figure 1 A schematic diagram of the automatic clamp with a buffer structure from another perspective;
[0024] Figure 3 for Figure 1 The diagram shown is another view of the automatic clamp with a buffer structure. Detailed Implementation
[0025] To facilitate understanding of this application, a more complete description will be provided below with reference to the accompanying drawings. Preferred embodiments of this application are shown in the drawings. However, this application can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of the disclosure of this application.
[0026] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly attached to the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.
[0027] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the specification of this application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.
[0028] To better understand the technical solution and beneficial effects of this application, the following detailed description is provided in conjunction with specific embodiments:
[0029] Please see Figures 1 to 3This is an embodiment of the present invention, an automatic gripper 10 with a buffer structure, which includes a connecting seat 100, a buffer mechanism 200, a clamping mechanism 300, and a control system (not shown). The connecting seat 100 is used to connect the actuator end of the robotic arm. The buffer mechanism 200 includes an upper plate 210, a lower plate 220, a guide rod 230, and a spring 240. The upper plate 210 is connected to the connecting seat 100, and the lower plate 220 has a through hole 2201. The upper plate 210 and the lower plate 220 are fixedly connected. One end of the guide rod 230 is disposed on the upper plate 210, and the other end of the guide rod 230 passes through the through hole 2201. The spring 240 is sleeved on the guide rod 230 and abuts against the upper plate 210 and the lower plate 220 respectively. The clamping mechanism 300 includes a cylinder drive assembly 310 and several grippers 320. The cylinder drive assembly 310 is mounted on the side of the lower plate 220 away from the connecting seat 100. Each gripper 320 is connected to a drive shaft of the cylinder drive assembly 310. The cylinder drive assembly 310 and the spring 240 are correspondingly arranged. The cylinder drive assembly 310 and the spring 240 are located on two opposite sides of the lower plate 220, and both are located in the middle of the lower plate 220. The control terminal of the control system is electrically connected to the control terminal of the clamping mechanism 300 and the control terminal of the robotic arm.
[0030] In this embodiment, the automatic clamp 10 with a buffer structure has a buffer mechanism 200 between the robotic arm's execution end and the clamping mechanism 300. Through the elastic deformation of the preloaded spring 240, the impact energy during clamping and loading is absorbed, preventing damage to the equipment or workpiece caused by collisions. Furthermore, the automatic clamp 10 with the buffer structure controls the opening and closing of the clamping mechanism 300 through a control system, thereby achieving automatic clamping and loading, improving clamping efficiency and accuracy, and reducing the labor intensity of workers. Simultaneously, symmetrically arranged cylinder-driven jaws 320 are used to clamp the workpiece, adapting to different working conditions and improving the adaptability and stability of the clamping mechanism 300.
[0031] like Figure 1 and Figure 2 As shown, in one embodiment, the buffer mechanism 200 further includes a connector 250, through which the upper plate 210 and the lower plate 220 are fixedly connected.
[0032] like Figure 1 and Figure 2 As shown, in one embodiment, there are four connectors 250, which are located at the four corners of the buffer mechanism 200.
[0033] In this embodiment, bolted connecting columns are used to fix the upper and lower plates 220. The four connecting columns form a stable support frame, ensuring that the upper and lower plates 220 are parallel and the spacing is fixed, preventing deformation or tilting of the buffer mechanism 200 due to insufficient force during use. At the same time, quick assembly and disassembly can be achieved by tightening or loosening the bolts, facilitating maintenance of the internal components of the buffer mechanism 200. Furthermore, the connecting columns can also limit the movement direction and maximum compression stroke of the upper and lower plates 220, improving the stability of the buffer mechanism 200.
[0034] like Figures 1 to 3 As shown, there are four guide rods 230 and four springs 240, with the four guide rods 230 symmetrically arranged on both sides of the buffer mechanism 200. Specifically, in this embodiment, the four sets of guide rods 230 and springs 240 are symmetrically arranged on both sides of the central area to disperse the impact force, reduce the impact energy, avoid rigid rebound, and protect the robotic arm and the gripping mechanism 300. At the same time, the guide rods 230 guide and ensure that the springs 240 compress or rebound linearly, avoiding skewed friction and quickly returning to their original position after impact. Furthermore, the four springs 240 share the pressure, reducing the load on a single spring and extending their service life.
[0035] like Figure 1 and Figure 2 As shown, in one embodiment, the upper plate 210 has a threaded hole (not shown), and the guide rod 230 is disposed in the threaded hole and threadedly connected to the upper plate 210. It can be understood that the pre-compression of the spring 240 is adjusted by the screw-in depth to adapt to the impact strength. At the same time, the threaded connection prevents the guide rod 230 from loosening or shifting, and also facilitates the quick disassembly or replacement of the guide rod 230.
[0036] like Figure 1 and Figure 3 As shown, in one embodiment, there are two clamping mechanisms 300, symmetrically arranged on the side of the lower plate 220 opposite to the buffer mechanism 200. It can be understood that after one clamping mechanism 300 clamps a workpiece that has already been processed, the robotic arm rotates the automatic fixture 10 with the buffer structure, causing the other clamping mechanism 300 holding the workpiece to be processed to complete the clamping action, improving changeover efficiency and equipment utilization. Simultaneously, the symmetrical arrangement of the two clamping mechanisms 300, with the robotic arm's actuator flipping the automatic fixture 10 with the buffer structure, reduces alignment time and further improves changeover efficiency.
[0037] Furthermore, in this embodiment, each clamping mechanism 300 has three jaws 320, which are symmetrically arranged on the cylinder drive assembly 310. This three-jaw symmetrical layout design allows the three jaws 320 to retract synchronously for automatic centering, ensuring stable clamping of various irregularly shaped workpieces. The triangular layout provides excellent torsional resistance, and combined with the replaceable jaw design, it offers both reliability and adaptability, meeting the needs of automated production.
[0038] like Figure 1 and Figure 3 As shown, in one embodiment, one end of the connecting seat 100 extends axially to the outside of the upper plate 210 to form a mounting portion 110. The mounting portion 110 is used to connect the actuator end of the robotic arm, and the mounting portion 110 is provided with a connection interface 1101 that matches the flange of the actuator end of the robotic arm. It can be understood that the actuator end of the robotic arm and the working structure of the automatic gripper 10 with a buffer structure are misaligned, which can avoid collisions between the robotic arm and the workpiece, gripper, or surrounding equipment during the movement of the robotic arm. At the same time, it provides more operating space, which is convenient for maintenance and loading / unloading.
[0039] This application also provides an automatic clamping device, which includes a robot arm and an automatic clamp 10 with a buffer structure as described in any of the above embodiments. The robot arm is installed on one side of the machine tool, and the automatic clamp 10 with a buffer structure is connected to the actuator of the robot arm through a connecting seat 100. The control terminal of the control system of the automatic clamp 10 with a buffer structure is electrically connected to the control terminal of the controller, and the control terminal of the robot arm is electrically connected to the control terminal of the controller.
[0040] In this embodiment, the automatic clamping device achieves the automation of workpiece clamping, transfer, positioning, clamping and unloading through the coordinated operation of the robotic arm and the automatic clamp 10 with a buffer structure, as well as the automatic control of the controller, thereby improving clamping efficiency and accuracy and reducing the labor intensity of workers.
[0041] Compared with the prior art, this application has at least the following advantages:
[0042] 1. The aforementioned automatic clamp with a buffer structure has a buffer mechanism between the robotic arm execution end and the clamping mechanism. Through the elastic deformation of the preloaded spring, the impact energy during clamping and mounting is absorbed to avoid damage to the equipment or workpiece caused by collision.
[0043] 2. Automatic clamps with buffer structures control the opening and closing of the clamping mechanism through a control system, thereby achieving automatic clamping and mounting, improving clamping efficiency and accuracy, and reducing the labor intensity of workers. Simultaneously, symmetrically arranged cylinders drive the jaws to grip the workpiece, adapting to different working conditions and enhancing the adaptability and stability of the clamping mechanism.
[0044] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the disclosed patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.
Claims
1. An automatic gripper with a buffer structure, characterized in that, include: A connector for connecting the actuator end of a robotic arm; A buffer mechanism is provided, comprising an upper plate, a lower plate, a guide rod, and a spring. The upper plate is connected to the connecting seat, and the lower plate has a through hole. The upper plate and the lower plate are fixedly connected. One end of the guide rod is disposed on the upper plate, and the other end of the guide rod passes through the through hole. The spring is sleeved on the guide rod and abuts against the upper plate and the lower plate respectively. A clamping mechanism, comprising a cylinder drive assembly and a plurality of claws, wherein the cylinder drive assembly is mounted on the side of the lower plate away from the connecting seat, each claw is connected to a drive shaft of the cylinder drive assembly, and the cylinder drive assembly is correspondingly arranged with the spring; The control system is electrically connected to the control terminals of the clamping mechanism and the robotic arm, respectively.
2. The automatic clamp having a buffer structure according to claim 1, characterized by, The buffer mechanism also includes a connector, through which the upper plate and the lower plate are fixedly connected.
3. The automatic clamp having a buffer structure according to claim 2, wherein The number of connectors is four, and the four connectors are located at the four corners of the buffer mechanism.
4. The automatic clamp having a buffer structure according to claim 1, wherein The number of guide rods and the number of springs are four, and the four guide rods are symmetrically arranged on both sides of the buffer mechanism.
5. The automatic clamp having a buffer structure according to claim 1, wherein The upper plate has a threaded hole, and the guide rod is disposed in the threaded hole and threadedly connected to the upper plate.
6. The automatic clamp having a buffer structure according to claim 1, wherein The number of clamping mechanisms is two, and the two clamping mechanisms are symmetrically arranged on the side of the lower plate opposite to the buffer mechanism.
7. The automatic clamp having a buffer structure according to claim 1, wherein One end of the connector extends axially to form a mounting portion, which is used to connect to the actuator end of the robotic arm.
8. An automatic clamping device characterized by comprising: include: The robotic arm, the controller, and the automatic gripper with a buffer structure as described in claims 1-7 are provided. The robotic arm is mounted on one side of the machine tool. The automatic gripper with a buffer structure is connected to the actuator of the robotic arm via a connecting seat. The control terminal of the control system of the automatic gripper with a buffer structure is electrically connected to the control terminal of the controller. The control terminal of the robotic arm is electrically connected to the control terminal of the controller.