Batch processing press clamp
The batch processing clamping fixture driven by a rotary shaft and cylinder solves the problem of cumbersome clamping and disassembly of row-type workpieces, realizes the synchronous clamping and automatic release of multiple workpieces, and improves production efficiency and clamping efficiency.
Patent Information
- Application Number
- CN202522044467.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-09-23
- Publication Date
- 2026-08-25
- Estimated Expiration
- 2035-09-23
AI Technical Summary
In existing technologies, the clamping and disassembly process of row-type workpieces is cumbersome, resulting in low production efficiency. Especially in the case of multi-station, high-density arrangement, manual clamping of single pieces has become a bottleneck restricting production.
Design a batch processing clamping fixture, which adopts a rotating shaft and cylinder structure. The rotating shaft drives multiple pressure plates to rotate synchronously to clamp or release the workpiece. The cylinder piston rod pushes the rotating shaft to rotate in the forward direction to clamp, and its own weight drives it to rotate in the reverse direction to automatically release. The key connection structure and limit plate ensure stability.
It enables simultaneous clamping and automatic release of multiple workpieces, significantly improving clamping and production efficiency, simplifying the clamping and disassembly process, and is suitable for continuous processing of large batches of workpieces.
Smart Images
Figure CN224674389U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of clamping fixtures for batch processing of parts, and specifically to a clamping fixture for batch processing of parts. Background Technology
[0002] Currently, when batch processing workpieces of the row type (such as busbars), the common method is to manually clamp each workpiece individually. In the specific operation process, the operator needs to place each workpiece into the fixture for positioning one by one, and then adjust and tighten each clamping point one by one; after the processing is completed, each fixture needs to be operated again to release it.
[0003] This processing mode is highly dependent on manual labor, with cumbersome clamping and disassembly processes, resulting in long processing times for each batch. Especially when dealing with multi-station, high-density arranged parts, the clamping process becomes a key bottleneck restricting production efficiency. Therefore, there is an urgent need for a clamping device capable of multi-point synchronous clamping and automatic release to improve the automation level and production efficiency of batch processing. Utility Model Content
[0004] The purpose of this utility model is to provide a batch processing clamping fixture to solve the problem of cumbersome clamping and disassembly process for row-type workpieces mentioned in the background art.
[0005] To achieve the above objectives, this utility model provides the following technical solution:
[0006] A batch processing clamping fixture, characterized in that it comprises:
[0007] The system comprises a base, a rotating shaft, multiple pressure plates, and a cylinder. The base has a receiving groove for positioning multiple workpieces. The rotating shaft is rotatably mounted on the base along the extension direction of the receiving groove. The pressure plates are fixed to the rotating shaft and located above the receiving groove, used to press or release the workpieces as the rotating shaft rotates. The cylinder is fixed to the rotating shaft by a fixing plate, with its piston rod facing the base. When the piston rod of the cylinder extends and abuts against the base, it pushes the rotating shaft to rotate in the forward direction to press the workpieces. When the piston rod of the cylinder retracts, the cylinder and the fixing plate, under their own weight, drive the rotating shaft to rotate in the reverse direction, causing the pressure plates to lift and automatically release.
[0008] Furthermore, a keyed connection structure is provided between the fixed plate and the rotating shaft to transmit torque and limit radial loosening.
[0009] Furthermore, the rotating shaft is rotatably mounted on the base via at least two limiting plates; each end of the rotating shaft is provided with a retaining ring, and the retaining ring abuts against the corresponding limiting plate in the axial direction.
[0010] Furthermore, the limiting plate includes an end limiting plate and a middle limiting plate, which are respectively disposed at both ends and the middle of the base.
[0011] Furthermore, the free end of the pressure plate is configured to rotate downward and extend into the receiving groove when rotating in the forward direction with the rotation axis, so as to press the workpiece therein.
[0012] Furthermore, there are multiple cylinders, which are arranged at axial intervals along the rotation axis and symmetrically located on both sides of the intermediate limiting plate.
[0013] Furthermore, the rotating shaft can rotate in the opposite direction after the piston rod of the cylinder retracts, and its rotation angle is no greater than 40°.
[0014] Furthermore, the receiving groove is provided in multiple sets, and each set of receiving grooves corresponds to one of the rotating shafts; multiple rotating shafts are installed side by side on the base, and each can rotate independently, and each rotating shaft drives its corresponding pressure plate to press or release the workpiece in its group.
[0015] The advantages of the batch processing clamping fixture described in this utility model compared to the prior art are as follows:
[0016] By fixing multiple pressure plates on the same rotating shaft, each pressure plate can rotate synchronously with the rotating shaft, thereby achieving synchronous clamping or simultaneous release of multiple workpieces in the receiving groove, significantly improving clamping efficiency and making it suitable for continuous processing of large batches of workpieces.
[0017] Meanwhile, by mounting the cylinder on the rotating shaft with a fixed structure and setting its piston rod towards the base, when the piston rod extends and abuts the base, it can push the rotating shaft to rotate in the forward direction, causing the pressure plate to press down to achieve clamping; when the piston rod retracts, the cylinder and its fixed structure drive the rotating shaft to rotate in the reverse direction under its own weight, so that the pressure plate is automatically lifted, simplifying the clamping and disassembly process of row-type workpieces. Attached Figure Description
[0018] Figure 1 This is an isometric schematic diagram of the present invention;
[0019] Figure 2 for Figure 1 Enlarged view of 'a' in the middle;
[0020] Figure 3 for Figure 1 Enlarged view of b in the middle;
[0021] Figure 4 for Figure 1 A magnified view of C in the middle.
[0022] The attached diagram shows the following markings and corresponding component names: 10-base, 101-accommodating groove, 20-rotating shaft, 30-pressure plate, 40-cylinder, 401-fixed plate, 50-key connection structure, 601-end limiting plate, 602-intermediate limiting plate, 70-retaining ring. Detailed Implementation
[0023] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.
[0024] Example:
[0025] refer to Figures 1-2 This embodiment provides a batch processing clamping fixture, including a base 10, a rotating shaft 20, multiple pressure plates 30, and a cylinder 40. The base 10 has an overall rectangular parallelepiped structure, consisting of a lower metal base and an upper non-metallic mounting plate. The metal base can be made of stainless steel, and the non-metallic mounting plate can be made of engineering plastic. The metal base and the non-metallic mounting plate can be connected by fasteners such as bolts and pins.
[0026] A receiving groove 101 is formed along the length of the upper surface of the non-metallic mounting plate. The receiving groove 101 is used to position and place the workpiece to be processed (such as a busbar or other row-shaped parts). The cross-sectional shape of the receiving groove 101 matches the shape of the workpiece, enabling rapid centering and limiting of the workpiece. Multiple workpieces can be arranged sequentially along the extension direction of the receiving groove 101 to achieve batch positioning.
[0027] A rotating shaft 20 is rotatably mounted on a base 10 along the extending direction of the receiving groove 101. Multiple pressure plates 30 are fixedly mounted on the rotating shaft 20 and correspondingly positioned above the receiving groove 101. The pressure plates 30 are spaced apart along the axial direction of the rotating shaft 20 and arranged parallel to each other to achieve synchronous clamping of multiple workpieces within the receiving groove 101. When the rotating shaft 20 rotates under driving action, it causes all the pressure plates 30 to swing synchronously, thereby completing the overall clamping or unified release of multiple workpieces, thus improving clamping efficiency and action consistency.
[0028] The cylinder 40 is mounted on the rotating shaft 20 via a fixing plate 401. Specifically, the fixing plate 401 can be mounted on the opposite side of the pressure plate 30. The fixing plate 401 can be a metal plate structure, with one end connected to the outer wall of the cylinder 40 by bolts and the other end sleeved on the outer circumference of the rotating shaft 20. The cylinder 40 can be arranged horizontally, with its piston rod extending radially toward the base 10. During operation, when the control system supplies air to the cylinder 40, the piston rod extends outward, and its end gradually abuts against the upper surface of the base 10. As the piston rod continues to extend, it generates a thrust acting on the base 10, forming a torque centered on the rotating shaft 20. This torque drives the rotating shaft 20 to rotate multiple pressure plates 30 in the forward direction, causing the free end of the pressure plate 30 to rotate downward and press the workpiece in the receiving groove 101, thus realizing the batch clamping of workpieces.
[0029] After processing is completed, the air supply is cut off, and the piston rod retracts under the pressure relief of the internal spring or air passage. At this time, since the cylinder 40 body and its fixing plate 401 have a certain mass, the overall structure generates a reverse torque under its own gravity, which drives the rotating shaft 20 to rotate in the opposite direction, thereby lifting the pressure plate 30 upward and separating it from the workpiece surface, completing the automatic release action.
[0030] refer to Figures 2-3 It is worth noting that the reliability of torque transmission between cylinder 40 and rotating shaft 20 is directly related to the stability of the fixture's operation. To ensure stable torque transmission and prevent circumferential slippage or radial loosening of cylinder 40 fixing plate 401 during rotation, this embodiment provides a keyed connection structure 50 between cylinder 40 fixing plate 401 and rotating shaft 20.
[0031] Specifically, the key connection structure 50 may include an axial keyway formed on the outer peripheral surface of the rotating shaft 20, and a corresponding mating keyway provided on the inner wall of the shaft hole of the cylinder 40 fixing plate 401. After the two are aligned, a flat key or a semi-circular key can be inserted. The key and the slot can be fitted with a transition fit and fastened to achieve circumferential fixation between the rotating shaft 20 and the fixing plate 401, and suppress the shaking of the fixing plate 401 caused by vibration or off-center load.
[0032] refer to Figure 4 It should be noted that during the process of applying clamping force to the workpiece by the pressure plate 30, the rotating shaft 20 may bear radial loads and torsional torques from the pressure plate 30. If the rotating shaft 20 lacks effective constraint in the axial direction, axial movement is likely to occur, which will lead to the positional displacement of the pressure plate 30, resulting in uneven clamping force or even clamping failure. To ensure the axial stability of the rotating shaft 20 during operation, this embodiment provides at least two limiting plates on the base 10 for rotatable support and axial limiting of the rotating shaft 20.
[0033] Specifically, the limiting plates can be metal perforated plates with through holes matching the outer diameter of the rotating shaft 20. The rotating shaft 20 passes through each limiting plate and can rotate freely relative to it. The limiting plates can be fixed to the base 10 with fasteners such as bolts, and are arranged at intervals along the extension direction of the rotating shaft 20 to form a stable multi-point support structure, effectively improving the rigidity and rotational smoothness of the rotating shaft 20. Retaining rings 70 are installed at both ends of the rotating shaft 20. The outer diameter of the retaining ring 70 is larger than the inner diameter of the through hole in the limiting plate, and its end face abuts against the side of the corresponding limiting plate in the axial direction, thereby restricting the bidirectional axial movement of the rotating shaft 20.
[0034] Furthermore, the limiting plate includes an end limiting plate 601 and a middle limiting plate 602, which are respectively installed at both ends and the middle region of the base 10. The end limiting plates 601 are located on the left and right sides of the base 10, providing support and axial positioning for both ends of the rotating shaft 20; the middle limiting plate 602 is located in the center of the base 10, enhancing the support rigidity of the middle section of the rotating shaft 20 and effectively preventing it from deflecting under clamping force. Through the coordinated support at both ends and the middle, a stable three-point support structure is formed, improving the smoothness of movement and the overall structural rigidity of the rotating shaft 20 under multi-point stress conditions.
[0035] In some embodiments, the free end of the pressure plate 30 is configured to swing downward and extend into the receiving groove 101 when the rotating shaft 20 rotates in the forward direction, thereby applying a clamping force to the workpiece in the groove. Specifically, the pressure plate 30 may be cantilevered and fixed to the rotating shaft 20, with its length and installation height designed so that during the rotation of the rotating shaft 20, the free end descends along an arc trajectory and enters the receiving groove 101 area, ultimately acting on the upper surface of the workpiece to achieve clamping.
[0036] This design enables the pressure plate 30 to generate sufficient vertical clamping stroke at small turning angles, which not only improves operational efficiency but also enhances adaptability to workpieces of different heights. For example, when machining batches of workpieces with slightly different heights, by appropriately setting the length of the pressure plate 30, effective clamping can be achieved without changing the fixture, thus improving the versatility of the fixture.
[0037] It is worth noting that in this embodiment, multiple cylinders 40 are provided, distributed at intervals along the axial direction of the rotating shaft 20, to collaboratively drive the rotating shaft 20 to achieve stable rotation. Preferably, the multiple cylinders 40 can be symmetrically arranged on both sides of the intermediate limiting plate 602 to form a balanced thrust distribution. This symmetrical layout effectively avoids torsional deformation or local stress concentration of the rotating shaft 20 caused by uneven force on one side, improving the overall force rationality and operational stability of the fixture.
[0038] It should be noted that after the piston rod of cylinder 40 retracts, the cylinder 40 body and its fixing structure drive the rotating shaft 20 to rotate in the opposite direction under its own weight, thereby automatically lifting the pressure plate 30. To balance the reliability of the release and the speed of the clamping response, the reverse rotation angle of the rotating shaft 20 is controlled within a range of no more than 40°.
[0039] If the rotation angle is too large, the pressure plate 30 will rise too high, resulting in a longer stroke during the next clamping operation, extending the cycle time and affecting the processing speed. If the angle is too small, the pressure plate 30 may not be able to fully detach from the workpiece, causing loading and unloading interference. For example, in a specific embodiment, the total mass of the cylinder 40 is approximately 2.5 kg, the radial eccentricity between the centerline of the cylinder 40 and the axis of the rotating shaft 20 is 80 mm, the distance between the fulcrum (i.e., the limiting plate) of the rotating shaft 20 is 300 mm, the cylinder 40 is installed 100 mm from one end fulcrum, the length of the pressure plate 30 is 120 mm, and the diameter of the rotating shaft 20 is 20 mm. Under these structural parameters, the rotating shaft 20 can stably rotate in the opposite direction by approximately 35° after the piston rod retracts, and the free end of the pressure plate 30 is raised to a height of approximately 70 mm, ensuring smooth loading and unloading of the workpiece while avoiding excessive stroke.
[0040] Furthermore, multiple sets of receiving slots 101 can be provided on the non-metallic mounting plate. Each set of receiving slots 101 is arranged in parallel along the length of the base 10, and each set is used to position and arrange a batch of workpieces to be processed. Each set of receiving slots 101 is configured with an independent rotating shaft 20. Multiple rotating shafts 20 are installed in parallel on the base 10, and each is rotatably supported on the base 10 by a limiting plate and a retaining ring 70 structure, without interfering with each other, and can rotate independently.
[0041] Multiple pressure plates 30 can be installed on each rotating shaft 20, located above the corresponding receiving groove 101, for clamping or releasing the workpiece group. Each rotating shaft 20 is equipped with a drive cylinder 40, which can independently complete the clamping and releasing actions. Therefore, when a certain process only needs to process a portion of the workstations, the corresponding rotating shaft 20 can be selectively driven to move, while the remaining clamping units remain stationary, thereby achieving regional and independent clamping.
[0042] Working principle:
[0043] In the initial state, the piston rod of cylinder 40 is in the retracted state, and the cylinder body and its fixing plate 401 are mounted on the rotating shaft 20. Under its own weight, the rotating shaft 20 is driven to be in the reverse tilt position, and the free end of the pressure plate 30 is raised upward, located above the receiving groove 101 but without interfering with the loading and unloading of the workpiece.
[0044] When processing is required, the control system supplies compressed air to the cylinder 40, the piston rod extends outward, and the end of the piston rod gradually abuts against the upper surface of the base 10. As the piston rod continues to extend, it generates a thrust that acts on the base 10. This thrust creates a positive torque on the rotating shaft 20, driving the rotating shaft 20 to rotate positively around its axis.
[0045] The rotation of the rotating shaft 20 causes multiple pressure plates 30 fixed on it to swing synchronously. The free ends of the pressure plates 30 move downward along an arc-shaped trajectory, eventually clamping the multiple workpieces arranged in the groove. At this time, each workpiece is reliably clamped, and the equipment can be started to perform drilling, milling and other processing operations.
[0046] After processing, the control system cuts off the air supply, and the piston rod retracts. At this time, the piston rod disengages from the support surface of the base 10 and no longer provides reverse constraint. Since the cylinder 40 body, the fixed plate 401, and the connecting parts have a certain mass, the overall structure generates a reverse torque on the rotating shaft 20 under its own gravity, causing the rotating shaft 20 to rotate in the opposite direction, thereby lifting the free end of the pressure plate 30 upward and separating it from the workpiece surface, thus achieving automatic release.
[0047] Throughout the entire working process, multiple pressure plates 30 move synchronously with the same rotating shaft 20 to achieve synchronous clamping and unified release of multiple workpieces; when multiple sets of receiving grooves 101 and multiple independent rotating shafts 20 are arranged in parallel, independent control of zones can also be achieved, improving the flexibility and applicability of the fixture.
[0048] The various illustrative embodiments mentioned in this specification refer to specific devices described in connection with those embodiments that are included in at least one embodiment of the general description in this application. The appearance of the same expression in multiple places in the specification does not necessarily refer to the same embodiment. Furthermore, when a device is described in connection with any embodiment, it is intended that implementing such a device in conjunction with other embodiments falls within the scope of this utility model.
Claims
1. A clamping fixture for batch processing of parts, characterized in that, include: A base, wherein a receiving groove for positioning multiple workpieces is provided on the base; A rotating shaft is rotatably mounted on the base along the extending direction of the receiving groove; Multiple pressure plates are fixed on the rotating shaft and located above the receiving groove, used to press or release the workpiece as the rotating shaft rotates; The cylinder is fixed to the rotating shaft by a fixing plate, and its piston rod is arranged towards the base. When the piston rod of the cylinder extends and abuts against the base, it pushes the rotating shaft to rotate in the forward direction to press the workpiece; when the piston rod of the cylinder retracts, the cylinder and the cylinder fixing plate drive the rotating shaft to rotate in the reverse direction under their own weight, causing the pressure plate to lift up and achieve automatic release.
2. The batch processing clamping fixture according to claim 1, characterized in that, A keyed connection structure is provided between the fixed plate and the rotating shaft to transmit torque and limit radial loosening.
3. The batch processing clamping fixture according to claim 2, characterized in that, The rotating shaft is rotatably mounted on the base via at least two limiting plates; each end of the rotating shaft is provided with a retaining ring, and the retaining ring abuts against the corresponding limiting plate in the axial direction.
4. The batch processing clamping fixture according to claim 3, characterized in that, The limiting plate includes an end limiting plate and a middle limiting plate, which are respectively disposed at both ends and the middle of the base.
5. The batch processing clamping fixture according to claim 4, characterized in that, The free end of the pressure plate is configured to rotate downward and extend into the receiving groove when rotating in the forward direction with the rotating axis to press the workpiece therein.
6. The batch processing clamping fixture according to claim 5, characterized in that, The cylinders are multiple, arranged at axial intervals along the rotation axis, and symmetrically located on both sides of the intermediate limiting plate.
7. The batch processing clamping fixture according to claim 6, characterized in that, The rotating shaft can rotate in the opposite direction after the piston rod of the cylinder retracts, and its rotation angle is no greater than 40°.
8. The batch processing clamping fixture according to claim 7, characterized in that, The receiving groove is provided in multiple sets, and each set of receiving grooves corresponds to one of the rotating shafts; multiple rotating shafts are installed side by side on the base, and each can rotate independently. Each rotating shaft drives its corresponding pressure plate to press or release the workpiece in its group.