Workpiece clamping device

Abstract

The utility model provides a kind of workpiece clamping device, including pedestal and at least two workpiece clamping units, workpiece clamping unit all includes: workpiece fixed base, fixedly set on pedestal, is equipped with the placement slot for placing workpiece;Movable clamp, movably set on pedestal, with the chuck that can enter or exit placement slot, for fixing or loosening workpiece;Sliding block, movably set on pedestal, and with movable clamp connection, enter or exit placement slot following the movement of sliding block;Transmission unit, with workpiece clamping unit linkage setting, for pushing sliding block to move, wherein, in each workpiece clamping unit, movable clamp and sliding block are respectively set on the two sides of workpiece fixed base, transmission unit synchronously pushes sliding block and chuck to move. Through movable clamp can fix the workpiece in placement slot, eliminate workpiece shake and positioning deviation, to reduce scrap rate. Meanwhile, be equipped with multiple workpiece clamping units to place workpiece, improve production efficiency.

Description

Technical Field

[0001] This utility model relates to the field of machining technology, specifically a workpiece clamping device. Background Technology

[0002] In modern manufacturing, many products require threaded holes. For example, in the electronics industry, threaded holes need to be machined on sensor bases.

[0003] However, current threaded hole machining methods, such as for sensor bases, typically employ a single-station approach. The workpiece is placed on a fixed support platform, allowing only one workpiece to be machined at a time. This results in low production efficiency and fails to meet the demands of mass production. Furthermore, after the workpiece is placed, its passive position on the support platform makes it susceptible to slight wobbling or positional shifts during station changes or threading processes. This is often caused by insufficient clamping force or structural design, directly affecting the machining accuracy of the threaded holes and leading to defects such as misaligned or incomplete holes, or even workpiece damage. Simultaneously, this unstable positioning directly increases the number of defective products, including poorly machined parts and surface scratches, significantly reducing the overall yield and resulting in material waste. Utility Model Content

[0004] To address the above problems, this utility model provides a workpiece clamping device, which aims to solve the technical problems of low production efficiency and unstable workpiece positioning.

[0005] This utility model discloses a workpiece clamping device, comprising a base and at least two workpiece clamping units, each workpiece clamping unit comprising: A workpiece holder is fixedly mounted on a base, and the workpiece holder has a placement slot for placing the workpiece. A movable clamp, movably mounted on a base, has a chuck that can enter or exit a placement slot for fixing or releasing a workpiece; The slider is movably mounted on the base and connected to the movable clamp. The clamp moves in or out of the placement slot following the movement of the slider. The transmission unit, linked to the workpiece clamping unit, is used to move the slider. In each workpiece clamping unit, a movable clamp and a slider are respectively set on both sides of the workpiece fixing seat. The transmission unit synchronously pushes the slider to move, so that the chuck enters or exits the placement slot.

[0006] According to the above technical solution, the movable fixture can effectively fix the workpiece in the placement slot, eliminating the shaking and positioning deviation of the workpiece during rotation and thread hole machining, thereby effectively improving machining accuracy and yield. Simultaneously, multiple workpiece clamping units are provided for placing multiple workpieces, and multiple workpieces are simultaneously fixed or released through a transmission unit, effectively improving production efficiency.

[0007] Optionally, there are two workpiece clamping units arranged in a mirror symmetrical manner. The two sliders in the two workpiece clamping units are arranged opposite each other. The transmission unit synchronously pushes the two sliders to move, and the two chucks synchronously enter or exit the placement slot.

[0008] According to the above technical solution, the mirror symmetry structural design allows the force applied by the transmission unit to be transmitted evenly and symmetrically to the sliders on both sides, and correspondingly drives the movable fixture to move, ensuring that the clamping and releasing states of the two workpieces are consistent; at the same time, dual-station production through two workpiece clamping units effectively improves production efficiency.

[0009] Optionally, the transmission unit includes a cylinder and a cam bearing housing, which is driven to move by the cylinder and has two rotatable cam bearings. The slider is also provided with a transmission engagement part, and the transmission engagement parts of the two sliders are arranged opposite to each other. The two cam bearings are configured to enter between the two sliders and roll along the transmission engagement part to push the sliders to move.

[0010] According to the above technical solution, a single cylinder drives a cam bearing to enter between two sliders, and the two cam bearings cooperate with the transmission mating parts on both sides to efficiently transform the single linear motion of the cylinder into the synchronous opposite motion of the two sliders. This effectively simplifies the transmission structure while ensuring transmission reliability.

[0011] Optionally, each transmission mating part is provided with a guide slope, the guide slopes of the two transmission mating parts are arranged opposite to each other, and the gap between the guide slopes gradually narrows along the entry direction of the cam bearing.

[0012] According to the above technical solution, the cooperation of cam bearing and guide inclined surface can push the slider to move more smoothly, thereby making the movement of the movable fixture more stable and controllable.

[0013] Optionally, the slider and the movable clamp are connected by a guide rod.

[0014] According to the above technical solution, the movable clamp is connected by a guide rod, which enables the movable clamp to move synchronously and stably with the slider, thereby controlling the clamp to move synchronously and stably.

[0015] Optionally, the workpiece holder is provided with a through hole, and the guide rod passes through the through hole.

[0016] According to the above technical solution, the slider and the movable clamp are located on both sides of the workpiece fixing seat and are connected to each other by the guide rod passing through the workpiece fixing seat, which effectively utilizes the internal space of the workpiece fixing seat and makes the overall structure more compact.

[0017] Optionally, the guide rod is also equipped with a linear bearing whose size matches the through hole.

[0018] According to the above technical solution, the linear bearing can effectively prevent the guide rod from bending or swaying when transmitting force, providing guidance and support for the linear movement of the guide rod, and ensuring the reliability of the linkage between the slider and the movable fixture.

[0019] Optionally, a tension spring is provided between the movable clamp and the workpiece fixing seat. The tension spring is configured to pull the movable clamp toward the workpiece fixing seat, so that the chuck enters the placement groove to fix the workpiece, and elastically reset after the chuck exits the placement groove and is stretched.

[0020] According to the above technical solution, a tension spring is set as a reset mechanism. In the absence of external force, it can automatically pull the movable clamp towards the workpiece fixing seat, achieving automatic clamping and fixing of the workpiece, simplifying the operation. Furthermore, the constant tension provided by the tension spring ensures stable fixing of the workpiece. Simultaneously, the elastic reset achieved by the stretched tension spring allows the chuck to more smoothly re-enter the placement slot as the cam bearing retracts.

[0021] Optionally, the placement slot has an opening on one side relative to the chuck, through which the chuck enters or exits the placement slot.

[0022] According to the above technical solution, it is convenient for the chuck to enter or exit the placement slot, so as to fix or release the workpiece more conveniently. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of the base, workpiece clamping unit, and transmission unit after installation in an embodiment of this utility model; Figure 2 This is a schematic diagram of the structure of the base having two workpiece clamping units in an embodiment of the present invention; Figure 3 This is an enlarged schematic diagram of the structure of a single workpiece clamping unit in an embodiment of this utility model; Figure 4 This is a schematic diagram of the slider and movable clamp in an embodiment of the present invention; Figure 5 This is a schematic diagram of the transmission unit in an embodiment of the present invention; Figure 6 This is a schematic diagram of the structure of the transmission unit with a cam bearing in an embodiment of the present invention.

[0024] Reference numerals: base 10, workpiece clamping unit 20, workpiece fixing seat 21, placement groove 22, opening 221, short groove 222, through hole 23, guide rod 24, linear bearing 241, movable fixture 25, chuck 26, top clamping part 261, side clamping part 262, slider 27, transmission mating part 28, guide inclined surface 281, tension spring 29, fixing column 210, transmission unit 30, cylinder 31, cam bearing seat 32, cam bearing 33, sensor base 200, worktable 300. Detailed Implementation

[0025] 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.

[0026] refer to Figure 1 The workpiece clamping device in this embodiment includes a base 10, a workpiece clamping unit 20, and a transmission unit 30.

[0027] refer to Figure 2 In this embodiment, the base 10 is provided with two workpiece clamping units 20.

[0028] Each workpiece clamping unit 20 includes a workpiece fixing seat 21, a movable clamp 25, and a slider 27.

[0029] The workpiece holder 21 is fixedly mounted on the base 10, and the workpiece holder 21 is provided with a placement groove 22 for placing the workpiece.

[0030] The movable clamp 25 is movably mounted on the base 10 and has a chuck 26 that can enter or exit the placement slot 22 for fixing or releasing the workpiece.

[0031] The slider 27 is movably mounted on the base 10 and connected to the movable clamp 25. The chuck 26 moves in or out of the placement slot 22 following the movement of the slider 27.

[0032] The transmission unit 30 is linked with the workpiece clamping unit 20 and is used to push the slider 27 to move.

[0033] In each workpiece clamping unit 20, the movable clamp 25 and the slider 27 are respectively arranged on both sides of the workpiece fixing seat 21. The transmission unit 30 synchronously pushes the slider 27 to move, so that the chuck 26 enters or exits the placement slot 22.

[0034] In this embodiment, the movable clamp 25 effectively fixes the workpiece in the placement slot 22, eliminating workpiece wobbling and positioning deviation during rotation and thread hole machining, thereby improving machining accuracy and yield. Simultaneously, two workpiece clamping units 20 are provided for placing the workpiece, and the transmission unit 30 coordinates to simultaneously fix or release the workpiece, enabling dual-station production and effectively improving production efficiency.

[0035] In this embodiment, the two workpiece clamping units 20 are arranged in a mirror symmetrical manner, and the two sliders 27 in the two workpiece clamping units 20 are arranged opposite each other, so that the force applied by the transmission unit 30 can be evenly and symmetrically transmitted to the sliders 27 on both sides. The transmission unit 30 can synchronously push the two sliders 27 to move, and correspondingly drive the movable clamp 25 to move, so that the two chucks 26 synchronously enter or exit the placement slot 22, ensuring that the clamping and releasing states of the two workpieces are consistent.

[0036] In this embodiment, the placement groove 22 is a recess formed by the top surface of the workpiece fixing seat 21, and the workpiece can be directly placed in the placement groove 22. (Reference) Figure 3 In this embodiment, short grooves 222 are also provided on both sides of the placement groove 22. The two sides of the workpiece can be clamped through the short grooves 222, making it easy to take out the workpiece placed in the placement groove 22.

[0037] Furthermore, the specific structure of the placement groove 22 is matched and configured to workpiece to be processed. (See reference) Figure 3 The shape and depth of the placement groove 22 are matched with the sensor base 200, allowing the sensor base 200 to be placed in the placement groove 22. After being fixed by the chuck 26, subsequent threaded hole machining can be performed. Furthermore, to address the threaded hole machining requirements of the sensor base 200, the bottom surface of the placement groove 22 is further provided with a recessed area and a through hole (not shown in the figure) relative to the threaded hole machining position, which assists in the correct placement of the sensor base 200 while facilitating thread drilling.

[0038] Furthermore, the placement groove 22 has an opening 221 on one side relative to the chuck 26, through which the chuck 26 enters or exits the placement groove 22. Specifically, the size of the chuck 26 is smaller than that of the opening 221, allowing the chuck 26 to enter through the opening 221 and directly clamp the workpiece from the side and top, facilitating workpiece fixation.

[0039] In this embodiment, the chuck 26 is detachably mounted on the movable clamp 25, which facilitates maintenance and replacement.

[0040] refer to Figure 4In this embodiment, the chuck 26 has a side clamping portion 262 and a top clamping portion 261 disposed above the side clamping portion 262 and extending toward the placement groove 22. The top clamping portion 261 is located above the placement groove 22. After the chuck 26 enters the placement groove 22 through the opening 221, the side clamping portion 262 contacts the side of the workpiece, enabling the workpiece to be fixed in the horizontal direction. At the same time, the top clamping portion 261 is positioned above the workpiece and contacts the top surface of the workpiece, enabling the workpiece to be fixed in the vertical direction, thereby enabling more stable and reliable workpiece fixing.

[0041] Furthermore, the slider 27 and the movable clamp 25 are connected by the guide rod 24, so that the movable clamp 25 and the chuck 26 can move synchronously with the movement of the slider 27.

[0042] The workpiece fixing seat 21 is provided with a through hole 23, and the guide rod 24 passes through the through hole 23.

[0043] In this embodiment, the through hole 23 is in the direction in which the chuck 26 enters or exits the opening 221. The slider 27 and the movable clamp 25 are located on both sides of the workpiece fixing seat 21 and are connected to each other by the guide rod 24 passing through the workpiece fixing seat 21. This effectively utilizes the internal space of the workpiece fixing seat 21 and makes the overall structure more compact.

[0044] refer to Figure 3 In this embodiment, the base 10 has two through holes 23 at the bottom, located at the upper and lower ends of the base 10 respectively. Two guide rods 24 are respectively inserted to connect the slider 27 and the movable clamp 25, so that the slider 27 and the movable clamp 25 can move more stably and synchronously.

[0045] It should be pointed out that, Figure 2 and Figure 3 The diagram shows the structure when the slider 27 is pushed and the chuck 26 has exited the placement slot 22.

[0046] In this embodiment, the guide rod 24 is also provided with a linear bearing 241 whose size matches that of the through hole 23.

[0047] refer to Figure 3 and Figure 4The guide rod 24 is smaller than the through hole 23. The linear bearing 241, which is fixedly sleeved on the guide rod 24, matches the size of the through hole 23. This provides guidance and support for the linear movement of the guide rod 24, preventing it from bending or swaying when transmitting force. This ensures that the slider 27 and the movable clamp 25 can move synchronously and linearly. Simultaneously, during the movement of the guide rod 24, the linear bearing 241 can contact and roll against the inner wall of the through hole 23, allowing the horizontal movement of the slider 27 to be accurately transmitted to the movable clamp 25 without deviation or resistance. This, in turn, drives the chuck 26 to accurately enter or exit the placement slot 22.

[0048] refer to Figure 5 In this embodiment, the transmission unit 30 includes a cylinder 31 and a cam bearing housing 32. The cylinder 31 provides driving force, and the cam bearing housing 32 is driven by the cylinder 31 to move, having two rotatable cam bearings 33.

[0049] refer to Figure 2 and Figure 3 The slider 27 is also provided with a transmission engagement portion 28. The transmission engagement portions 28 of the two sliders 27 are arranged opposite to each other. The two cam bearings 33 are configured to enter between the two sliders 27 and roll along the transmission engagement portion 28 to push the sliders 27 to move. Furthermore, each transmission engagement portion 28 is provided with a guide slope 281. The guide slopes 281 of the two transmission engagement portions 28 are arranged opposite to each other, and the gap between the guide slopes 281 gradually narrows along the entry direction of the cam bearings 33.

[0050] refer to Figure 1 In this embodiment, the base 10 with the workpiece clamping unit 20 and the transmission unit 30 are respectively installed in the rotatable worktable 300. Multiple sets of bases 10 and transmission units 30 can be provided in one worktable 300 at the same time, which facilitates the change of work positions such as feeding, processing and unloading by rotation, so as to improve production efficiency.

[0051] After the base 10 and the transmission unit 30 are installed, the cam bearing seat 32 will be positioned above the slider 27, so that when the cylinder 31 drives the cam bearing seat 32 to move, the cam bearing seat 32 moves above the slider 27, and at the same time, the cam bearing 33 provided in the cam bearing seat 32 moves between the two sliders 27.

[0052] It should be pointed out that, Figure 1 The installation method shown is an example of usage. In actual application, it is only necessary to ensure that after the base 10 with workpiece clamping unit 20 and transmission unit 30 are installed, the cylinder 31 can drive the cam bearing 33 to enter between the two sliders 27 and push the two sliders 27 to run synchronously in opposite directions.

[0053] Furthermore, the gap between the entry ends of the two guide ramps 281 that are set opposite to each other matches the gap between the two cam bearings 33. The two cam bearings 33 enter between the two sliders 27 and will roll along the guide ramps 281 on both sides as the cylinder 31 pushes them. As the cam bearings 33 move downward, the gap between the guide ramps 281 gradually narrows along the entry direction of the cam bearings 33, which can smoothly convert the vertical thrust of the cam bearings 33 into an outward horizontal thrust, and accordingly push the sliders 27 on both sides to move in opposite directions in a synchronous manner, so that the clamps 26 on both sides exit the placement groove 22 synchronously.

[0054] Further, refer to Figure 3 A tension spring 29 is provided between the movable clamp 25 and the workpiece fixing seat 21. The tension spring 29 is configured to pull the movable clamp 25 toward the workpiece fixing seat 21, so that the chuck 26 enters the placement groove 22 to fix the workpiece, and elastically reset after the chuck 26 is pulled out of the placement groove 22 and stretched.

[0055] Specifically, when the two cam bearings 33 synchronously push the sliders 27 on both sides to move in opposite directions, the two movable clamps 25 are correspondingly pushed to move away from the workpiece fixed seat 21, so that the clamps 26 on both sides exit the placement groove 22 synchronously. During this process, the tension spring 29 will be stretched. When the cam bearings 33 gradually exit, the tension spring 29 will synchronously perform elastic reset, pulling the movable clamps 25 toward the workpiece fixed seat 21, so that the clamps 26 gradually enter the placement groove 22 as the cam bearings 33 exit.

[0056] refer to Figure 3 In this embodiment, the movable clamp 25 and the workpiece fixing seat 21 are respectively provided with fixing posts 210 on their sides, and the two ends of the tension spring 29 can be hung and fixed on the fixing posts 210 to quickly complete the installation and fixing. Furthermore, the setting of the tension spring 29 simplifies the operation, and the chuck 26 can automatically and continuously fix the workpiece under the action of the tension spring 29, effectively improving the fixing reliability.

[0057] In some implementations, the tension spring 29 may be replaced with other elastic elements that have a similar elastic restoring function.

[0058] In some embodiments, the transmission unit 30 may not use a cylinder 31, but may use other driving methods such as an electric actuator, servo motor, or hydraulic cylinder, as long as it can provide a stable driving force. The cam bearing 33 may also be other components with rolling fit function.

[0059] In some embodiments, the transmission unit 30 may also use push rods. Two push rods are connected to the sliders 27 on both sides with the same stroke. By driving the two push rods to move synchronously, the two sliders 27 move synchronously towards or away from each other, thereby causing the two chucks 26 to enter or exit the placement slot 22 synchronously. In addition, more than two workpiece clamping units 20 may be provided, and the transmission unit 30 may be provided with multiple push rods corresponding to the sliders 27 in each workpiece clamping unit 20 with the same stroke. This allows multiple sliders 27 to be pushed synchronously, causing multiple chucks 26 to enter or exit the placement slot 22 synchronously, and simultaneously fixing or releasing multiple workpieces.

[0060] The workflow of the workpiece clamping device in this embodiment when machining the threaded hole of the sensor base 200 is as follows: Before processing begins, the cam bearing 33 is driven by the cylinder 31 to enter between the two sliders 27, and the two sliders 27 are pushed to move in opposite directions in sync, so that the two movable clamps 25 are pushed to open to both sides, so that the clamps 26 on both sides exit the placement slots 22 in sync. Then, the two sensor bases 200 to be processed are placed into the placement slots 22 on both sides respectively.

[0061] After the material is unloaded, the cylinder 31 retracts, and the cam bearing 33 exits between the two sliders 27. The tension spring 29 performs an elastic reset, and under its tension, the movable clamp 25 automatically moves towards the workpiece fixing seat 21. The clamps 26 on both sides automatically enter the placement groove 22, fixing the sensor base 200 in the groove, thus ensuring that the sensor base 200 will not wobble during subsequent rotation and processing.

[0062] After the workpiece is fixed, the base 10, which is equipped with the workpiece clamping unit 20, and the transmission unit 30 rotate to the preset thread hole machining station. After accurate positioning, the thread holes of the two fixed sensor bases 200 are machined simultaneously. Since the sensor bases 200 are fixed, they will not shake or shift during the machining process, ensuring machining accuracy and yield.

[0063] After processing, the base 10 with workpiece clamping unit 20 and transmission unit 30 can be rotated to the unloading position. Cylinder 31 drives cam bearing 33 to enter between two sliders 27 again, and pushes two movable clamps 25 to open to both sides respectively, so that the clamps 26 on both sides exit the placement slot 22 at the same time. After the sensor base 200 with threaded hole processing is in the loosened state, unloading can be performed.

[0064] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A workpiece clamping device, characterized in that, include: Base; At least two workpiece clamping units, each of the workpiece clamping units comprising: A workpiece holder is fixedly mounted on the base, and the workpiece holder is provided with a placement groove for placing the workpiece; A movable clamp is movably mounted on the base and has a chuck that can enter or exit the placement slot for fixing or releasing the workpiece. A slider is movably mounted on the base and connected to the movable clamp. The clamp moves in or out of the placement slot following the movement of the slider. The transmission unit, linked to the workpiece clamping unit, is used to push the slider to move. In each of the workpiece clamping units, the movable clamp and the slider are respectively disposed on both sides of the workpiece fixing seat, and the transmission unit synchronously pushes the slider to move, so that the chuck enters or exits the placement slot.

2. The workpiece clamping device according to claim 1, characterized in that, The workpiece clamping unit is provided in two and is arranged in a mirror symmetrical manner. The two sliders in the two workpiece clamping units are arranged opposite each other. The transmission unit synchronously pushes the two sliders to move, and the two chucks synchronously enter or exit the placement slot.

3. The workpiece clamping device according to claim 2, characterized in that, The transmission unit includes: cylinder; The cam bearing housing, moved by the cylinder, has two rotatable cam bearings. The slider is also provided with a transmission engagement part, the transmission engagement parts of the two sliders are arranged opposite to each other, and the two cam bearings are configured to enter between the two sliders and roll along the transmission engagement part to push the slider to move.

4. The workpiece clamping device according to claim 3, characterized in that, Each of the transmission mating parts is provided with a guide slope, the guide slopes of the two transmission mating parts are arranged opposite each other, and the gap between the guide slopes gradually narrows along the entry direction of the cam bearing.

5. The workpiece clamping device according to claim 1, characterized in that, The slider and the movable clamp are connected by a guide rod.

6. The workpiece clamping device according to claim 5, characterized in that, The workpiece fixing seat is provided with a through hole, and the guide rod passes through the through hole.

7. The workpiece clamping device according to claim 6, characterized in that, The guide rod is also equipped with a linear bearing whose size matches the through hole.

8. The workpiece clamping device according to claim 1, characterized in that, A tension spring is also provided between the movable clamp and the workpiece fixing seat. The tension spring is configured to pull the movable clamp toward the workpiece fixing seat, so that the chuck enters the placement groove to fix the workpiece, and elastically reset after the chuck exits the placement groove and is stretched.

9. The workpiece clamping device according to claim 1, characterized in that, The placement slot has an opening on one side relative to the chuck, through which the chuck enters or exits the placement slot.

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