A positioning and clamping device for mechanical design and manufacturing

Abstract

This utility model relates to a positioning and clamping device for mechanical design and manufacturing, belonging to the field of mechanical design and manufacturing technology. The positioning and clamping device includes: a three-jaw chuck; and a fixing mechanism, which includes three fixing rods respectively disposed on the guide portions of the corresponding jaws of the three-jaw chuck. During the process of driving the three fixing rods to simultaneously clamp and fix a circular workpiece with corresponding fixing plates, multiple reinforcing plates move synchronously. Under the action of a coil spring, after the fixing plate has fixed the circular workpiece, the reinforcing plates on both sides of the fixing plate simultaneously contact and abut against the surface of the circular workpiece, increasing the contact area during the fixing of the circular workpiece. Furthermore, the rods and nuts facilitate the abutting and fixing of the rotating shaft of the reinforcing plate during the process of abutting and reinforcing the circular workpiece, ensuring the stability of the reinforcing plate during reinforcement and improving the reinforcement effect on the circular workpiece.

Description

Technical Field

[0001] This utility model relates to the field of mechanical design and manufacturing technology, and in particular to a positioning and clamping device for mechanical design and manufacturing. Background Technology

[0002] Mechanical design and manufacturing generally refers to the design and manufacture of machinery. In order to ensure that the workpiece maintains a precise position and stability during the processing, clamping devices are usually used to fix and hold the workpiece. Among them, the three-jaw chuck is a commonly used fixing component in the design and manufacturing of round workpieces.

[0003] According to the Chinese patent "A Positioning and Clamping Device for Mechanical Design and Manufacturing" (authorization announcement number CN221967835U), the device uses a detachable movable block to clamp the workpiece. When the clamping block is damaged, only the contact surface movable block needs to be replaced, without replacing the entire clamping block. This reduces the cost of use and improves the service life and practicality of the positioning and clamping device for mechanical design and manufacturing.

[0004] Although the movable block in the above application can clamp the workpiece, the fixed area of ​​the movable block when clamping and fixing the workpiece is small, which will affect the stability when fixing the workpiece. Utility Model Content

[0005] Therefore, it is necessary to provide a positioning and clamping device for mechanical design and manufacturing to address the problem that the small fixing area of ​​the movable block when clamping and fixing the workpiece affects the stability of the workpiece.

[0006] The device includes: a three-jaw chuck; a fixing mechanism, wherein the fixing mechanism includes three fixing rods respectively disposed on the guide portions of the corresponding jaws of the three-jaw chuck, a fixing plate is fixedly connected to the end of each fixing rod away from the jaw guide portion, two fixing blocks are fixedly connected to both sides of each fixing plate, a reinforcing plate is rotatably connected between the opposite sides of the two fixing blocks, a coil spring is fixedly connected to the surface of the rotating shaft of the reinforcing plate, the end of the coil spring away from the reinforcing plate is fixedly connected to the inner wall of the fixing block, and a limit rod is fixedly connected to both sides of each fixing plate, the end of the limit rod away from the fixing plate is in contact with one side of the reinforcing plate.

[0007] In one embodiment, the fixing mechanism further includes a movable plate slidably connected to one end of the fixed plate. One end of the rotating shaft of the reinforcing plate passes through the movable plate and is slidably connected to the inner wall of the movable plate. A nut is rotatably connected to the end of the fixed plate away from the movable plate. A round rod is fixedly connected to one side of the movable plate. The end of the round rod away from the movable plate passes through the fixed plate and the nut in sequence. The movable plate and the fixed plate are fixedly installed through the nut and the round rod. This facilitates the fixing of the reinforcing plate when reinforcing the workpiece, ensuring the stability of the reinforcing plate.

[0008] In one embodiment, a mounting plate is installed on the side of the fixed plate away from the fixed rod, and a connecting plate is installed on the side of the reinforcing plate. The mounting plate and the fixed plate, as well as the connecting plate and the reinforcing plate, are installed together by bolts. This facilitates disassembly and replacement of the mounting plate and connecting plate when they become worn, eliminating the need to replace the entire fixed plate and reinforcing plate, thus improving the practicality of the device. In another embodiment, one end of the round rod is threaded, and the round rod and the nut are fixedly connected by the threads. The interaction between the threads and the nut facilitates driving the round rod to move the movable plate.

[0009] In one embodiment, magnetic blocks are fixedly connected to one end of the rotating shaft of the reinforcing plate and the inner wall of the movable plate, with two magnetic blocks fixedly connected to the inner wall of the movable plate. While the movable plate abuts and fixes the rotating shaft of the reinforcing plate, the magnetic blocks at one end of the rotating shaft of the reinforcing plate attract each other to the corresponding magnetic blocks inside the movable plate, which helps to enhance the fixing effect on the reinforcing plate.

[0010] In one embodiment, contact pads, which are rubber components, are fixedly connected to both the side of the mounting plate away from the fixing plate and the side of the connecting plate away from the reinforcing plate. This increases the friction between the mounting plate and the connecting plate and the workpiece contact surface during the workpiece fixing process.

[0011] In one embodiment, the end of the connecting plate away from the fixing plate is bent into an arc shape. This reduces the frictional force when one end of the connecting plate contacts the workpiece during the workpiece fixing process.

[0012] In one embodiment, the two reinforcing plates are symmetrical about the center of the fixed plate. This ensures the reinforcing effect of the two reinforcing plates on the workpiece during the workpiece fixing process.

[0013] Beneficial effects

[0014] 1. In the above-mentioned fixing mechanism, during the process of driving the three fixing rods to simultaneously clamp and fix the circular workpiece with the corresponding fixing plates, multiple reinforcing plates move synchronously. Under the action of the coil spring, after the fixing plate has fixed the circular workpiece, the reinforcing plates on both sides of the fixing plate simultaneously contact and abut against the surface of the circular workpiece, increasing the contact area when fixing the circular workpiece. In the process of the round rod and nut, which is conducive to the reinforcing plate abutting and fixing the rotating shaft of the reinforcing plate during the process of abutting and reinforcing the circular workpiece, the stability of the reinforcing plate during reinforcement is ensured and the reinforcement effect of the circular workpiece is improved.

[0015] 2. The setting of magnetic blocks: While the moving plate is pressing and fixing the rotating shaft of the reinforcing plate, the magnetic block at one end of the rotating shaft of the reinforcing plate and the corresponding magnetic block in the moving plate attract each other, which helps to enhance the stability of the fixing of the reinforcing plate, thereby enhancing the stability of the reinforcing plate when reinforcing a round workpiece. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the fixing mechanism structure of this utility model;

[0019] Figure 3 This is an exploded view of the fixing plate and mounting plate of this utility model;

[0020] Figure 4 This is an exploded view of the movable plate and mounting plate of this utility model;

[0021] Figure 5 This is an exploded view of the reinforcing plate and connecting plate of this utility model.

[0022] Figure label:

[0023] 100. Three-jaw chuck; 200. Fixing mechanism; 210. Fixing rod; 220. Fixing plate; 221. Mounting plate; 222. Nut; 230. Fixing block; 240. Reinforcing plate; 241. Connecting plate; 250. Coil spring; 260. Moving plate; 261. Round rod; 270. Magnetic block; 280. Limiting rod; 290. Contact pad. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0025] The following is combined Figures 1-5 This invention describes a positioning and clamping device for mechanical design and manufacturing.

[0026] In one embodiment, a positioning and clamping device for mechanical design and manufacturing includes: a three-jaw chuck 100; and a fixing mechanism 200. The fixing mechanism 200 includes three fixing rods 210 respectively disposed on the guide portions of the corresponding jaws of the three-jaw chuck 100. A fixing plate 220 is fixedly connected to one end of the fixing rod 210 away from the jaw guide portion. Two fixing blocks 230 are fixedly connected to both sides of the fixing plate 220. A reinforcing plate 240 is rotatably connected between the opposite sides of the two fixing blocks 230. A coil spring 250 is fixedly connected to the surface of the rotating shaft of the reinforcing plate 240. One end of the coil spring 250 away from the reinforcing plate 240 is fixedly connected to the inner wall of the fixing block 230. Limiting rods 280 are fixedly connected to both sides of the fixing plate 220. One end of the limiting rod 280 away from the fixing plate 220 is in contact with one side of the reinforcing plate 240.

[0027] It should be noted that the three-jaw chuck 100 is a relatively mature device with existing technology. The specific model can be selected according to actual needs. The three-jaw chuck 100 consists of a chuck body, movable jaws, and a jaw drive mechanism. One side of the guide part of the three jaws on the three-jaw chuck 100 has threads that mesh with the flat threads on the back of the disc bevel gear. When the small bevel gear is rotated through the square hole with a wrench, the disc gear rotates, and the flat threads on the back simultaneously drive the three jaws to move closer to or out of the center to clamp workpieces of different diameters. This is existing known technology, so its principle has not been analyzed and explained in detail. In the device, the fixing rod 210 is installed on the existing jaw drive part, and the device is equivalent to the existing movable jaw part.

[0028] In this embodiment, when the device is in the initial state, the reinforcing plates 240 on both sides of the fixed plate 220 are in an inclined state, and the coil spring 250 is in a released state. The limiting rod 280 limits the reinforcing plate 240 to prevent the reinforcing plate 240 from rotating in the direction of the fixed plate 220. The distance between the center point of the three fixed plates 220 and the center of the three-jaw chuck 100 is the same.

[0029] like Figure 3 and Figure 4As shown, the fixing mechanism 200 also includes a movable plate 260 slidably connected to one end of the fixed plate 220. One end of the rotating shaft of the reinforcing plate 240 passes through the movable plate 260 and is slidably connected to the inner wall of the movable plate 260. The fixed plate 220 is rotatably connected to a nut 222 at the end away from the movable plate 260. A round rod 261 is fixedly connected to one side of the movable plate 260. The end of the round rod 261 away from the movable plate 260 passes through the fixed plate 220 and the nut 222 in sequence. The movable plate 260 and the fixed plate 220 are fixedly installed by the nut 222 and the round rod 261.

[0030] In this embodiment, a circular groove is provided on the inner wall of the movable plate 260, and one end of the rotating shaft of the reinforcing plate 240 passes through the circular groove. During the process of driving the fixed plate 220 in the fixing mechanism 200 to move and fix the workpiece, one end of the rotating shaft of the reinforcing plate 240 moves away from the inner wall of the circular groove of the movable plate 260, thereby ensuring that the reinforcing plate 240 can rotate normally.

[0031] like Figure 3 and Figure 4 As shown, a mounting plate 221 is installed on the side of the fixing plate 220 away from the fixing rod 210, and a connecting plate 241 is installed on the side of the reinforcing plate 240. The mounting plate 221 and the fixing plate 220, as well as the connecting plate 241 and the reinforcing plate 240, are installed by bolts.

[0032] In this embodiment, a locking rod is fixedly connected to one side of the mounting plate 221 and one side of the connecting plate 241. A locking groove matching the locking rod is provided on one side of the reinforcing plate 240 and the side of the fixing plate 220 away from the fixing rod 210. Bolts are threadedly connected to the four corners of the mounting plate 221 and the four corners of the connecting plate 241. Threaded holes are provided at the four corners of the fixing plate 220 and the four corners of the reinforcing plate 240. During daily use, the locking rod engages with the corresponding locking groove, and the bolts are threadedly connected with the corresponding threaded holes, thereby fixing the mounting plate 221 and the fixing plate 220, and fixing the connecting plate 241 and the reinforcing plate 240. When it is necessary to replace the mounting plate 221 or the connecting plate 241, the connection between the bolts and the corresponding threaded holes is released, and the mounting plate 221 or the connecting plate 241 can be removed.

[0033] like Figure 3 As shown, one end of the round rod 261 is threaded, and the round rod 261 and the nut 222 are fixedly connected by the thread.

[0034] In this embodiment, the nut 222 is always threadedly connected to the round rod 261 during use. When it is necessary to move the moving plate 260 away from the fixed plate 220, rotating the nut 222 counterclockwise will cause the round rod 261 to push the moving plate 260 away from the fixed plate 220, and rotating the nut 222 clockwise will cause the round rod 261 to drive the moving plate 260 away from the fixed plate 220.

[0035] like Figure 4 and Figure 5 As shown, a magnetic block 270 is fixedly connected to one end of the rotating shaft of the reinforcing plate 240 and the inner wall of the movable plate 260. The number of magnetic blocks 270 fixedly connected to the inner wall of the movable plate 260 is two.

[0036] In this embodiment, the two magnetic blocks 270 inside the movable plate 260 are respectively installed in the two circular slots opened in the movable plate 260, and the two magnetic blocks 270 inside the movable plate 260 are respectively located on the same axis as the magnetic blocks 270 at one end of the rotation shaft of the corresponding two reinforcing plates 240, and the magnetic poles of the corresponding two magnetic blocks 270 are opposite. Therefore, when the corresponding two magnetic blocks 270 are close to each other, the two magnetic blocks 270 will attract each other.

[0037] like Figure 3 and Figure 5 As shown, the mounting plate 221 on the side away from the fixing plate 220 and the connecting plate 241 on the side away from the reinforcing plate 240 are both fixedly connected with contact pads 290, which are rubber components.

[0038] In this embodiment, the surface of the contact pad 290 is provided with a plurality of evenly distributed grooves, and when the workpiece is fixed, the surface of the contact pad 290 contacts the surface of the workpiece.

[0039] like Figure 5 As shown, the end of the connecting plate 241 away from the fixed plate 220 is bent into an arc shape.

[0040] In this embodiment, during the process of fixing the circular workpiece by moving the reinforcing plate 240 driven by the fixing plate 220, one arc-shaped end of the reinforcing plate 240 will contact the surface of the workpiece.

[0041] like Figure 3 As shown, the two reinforcing plates 240 are symmetrical about the center of the fixed plate 220. This ensures the reinforcement effect of the two reinforcing plates 240 on the workpiece.

[0042] Working principle: A circular workpiece is placed in the three-jaw chuck 100, and the jaws of the three-jaw chuck 100 drive the fixing rod 210 to approach the surface of the circular workpiece. During this approach, one end of the connecting plate 241 will contact the surface of the circular workpiece. As it continues to move, the circular workpiece will press the reinforcing plate 240 through the connecting plate 241, causing the angle between the reinforcing plate 240 and the fixing plate 220 to gradually increase. This gradually brings the surface of the contact pad 290 on the connecting plate 241 into contact with the surface of the circular workpiece, compressing the coil spring 250. During this continuous movement, the fixing plate 220... The contact pad 290 on the movable mounting plate 221 contacts and presses against the surface of the circular workpiece to fix it. At the same time, under the action of the coil spring 250, the reinforcing plate 240 drives the connecting plate 241 and the corresponding contact pad 290 to contact and press against the surface of the circular workpiece for reinforcement. At this time, the three nuts 222 are rotated in sequence to drive the corresponding round rod 261 to move the moving plate 260 towards the fixed plate 220 to press against and fix the rotation shaft of the reinforcing plate 240, so that the reinforcing plate 240 remains stable during reinforcement. After this operation is completed, the workpiece fixing operation is completed.

[0043] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions will not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A positioning and clamping device for mechanical design and manufacturing, characterized in that, include: Three-jaw chuck (100); A fixing mechanism (200) includes three fixing rods (210) respectively disposed on the guide portions of the jaws of the three-jaw chuck (100). A fixing plate (220) is fixedly connected to one end of the fixing rod (210) away from the jaw guide portion. Two fixing blocks (230) are fixedly connected to both sides of the fixing plate (220). A reinforcing plate (240) is rotatably connected between the opposite sides of the two fixing blocks (230). A coil spring (250) is fixedly connected to the surface of the rotating shaft of the reinforcing plate (240). One end of the coil spring (250) away from the reinforcing plate (240) is fixedly connected to the inner wall of the fixing block (230). Limiting rods (280) are fixedly connected to both sides of the fixing plate (220). One end of the limiting rod (280) away from the fixing plate (220) is in contact with one side of the reinforcing plate (240).

2. The positioning and clamping device for mechanical design and manufacturing according to claim 1, characterized in that, The fixing mechanism (200) further includes a movable plate (260) slidably connected to one end of the fixed plate (220). One end of the rotating shaft of the reinforcing plate (240) passes through the movable plate (260) and is slidably connected to the inner wall of the movable plate (260). A nut (222) is rotatably connected to the end of the fixed plate (220) away from the movable plate (260). A round rod (261) is fixedly connected to one side of the movable plate (260). The end of the round rod (261) away from the movable plate (260) passes through the fixed plate (220) and the nut (222) in sequence. The movable plate (260) and the fixed plate (220) are fixedly installed by the nut (222) and the round rod (261).

3. The positioning and clamping device for mechanical design and manufacturing according to claim 1, characterized in that, An mounting plate (221) is installed on the side of the fixing plate (220) away from the fixing rod (210), and a connecting plate (241) is installed on one side of the reinforcing plate (240). The mounting plate (221) and the fixing plate (220) are installed together and the connecting plate (241) and the reinforcing plate (240) are installed together by bolts.

4. The positioning and clamping device for mechanical design and manufacturing according to claim 2, characterized in that, One end of the round rod (261) is provided with a thread, and the round rod (261) and the nut (222) are fixedly connected by the thread.

5. The positioning and clamping device for mechanical design and manufacturing according to claim 1, characterized in that, A magnetic block (270) is fixedly connected to one end of the rotating shaft of the reinforcing plate (240) and the inner wall of the moving plate (260). The number of magnetic blocks (270) fixedly connected to the inner wall of the moving plate (260) is two.

6. The positioning and clamping device for mechanical design and manufacturing according to claim 3, characterized in that, The mounting plate (221) on the side away from the fixing plate (220) and the connecting plate (241) on the side away from the reinforcing plate (240) are both fixedly connected with contact pads (290), and the contact pads (290) are rubber components.

7. The positioning and clamping device for mechanical design and manufacturing according to claim 3, characterized in that, The end of the connecting plate (241) away from the fixed plate (220) is bent into an arc shape.

8. The positioning and clamping device for mechanical design and manufacturing according to claim 1, characterized in that, The two reinforcing plates (240) are symmetrical about the center of the fixing plate (220).

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