A CNC quick clamping fixture

Abstract

This utility model relates to the field of CNC clamping fixture technology, and more particularly to a CNC rapid clamping fixture. It includes a base, a workpiece, a clamping device, and two auxiliary devices. The workpiece is fixedly connected to the base via the clamping device. The clamping device includes a support frame and an auxiliary pad. The lower end of the support frame is fixedly connected to the base. A support plate is fixedly connected to the inner wall surface of the support frame. A rotating rod is rotatably connected to the inner wall of the support plate. A first bevel gear is fixedly connected to one end of the rotating rod. A rotating column is rotatably connected to the inner wall surface of the support plate. A second bevel gear is fixedly connected to one end of the rotating column. The tooth surface of the second bevel gear meshes with the tooth surface of the first bevel gear. An adjusting wheel is fixedly connected to the arc surface of the rotating column. This utility model provides a CNC rapid clamping fixture with the advantage of being able to quickly clamp workpieces of various sizes and types.

Description

Technical Field

[0001] This utility model relates to the field of CNC clamping fixture technology, and in particular to a CNC quick clamping fixture. Background Technology

[0002] CNC clamping fixtures are workpiece fixing tools specifically designed for CNC machining. They are used to stabilize the workpiece during processing, ensuring its positioning accuracy and machining quality. They are important tools for improving production efficiency and machining accuracy, and are widely used in various CNC machining tasks such as turning, milling, and drilling.

[0003] Existing technologies, such as the utility model with publication number CN209598752U, disclose a clamping fixture for CNC machining, including a base and a clamping assembly. The clamping assembly includes a first clamping plate and a second clamping plate. Two slide rails are respectively arranged on the front side of the first clamping plate and the rear side of the second clamping plate along their length direction to the front and rear edges of the base. The first clamping plate and the second clamping plate are correspondingly inserted into the slide rails and move along the slide rails. Several positioning bars are connected between the first clamping plate and the second clamping plate. The positioning bars are composed of two splicing blocks of equal length connected by springs. Several drive mechanisms with telescopic rods connected to one end are arranged on the front side of the first clamping plate. The head of the telescopic rod is integrally provided with a clamping block for clamping the workpiece from above. Several clearance grooves are provided on the outer surface of the first clamping plate for the clamping blocks to pass through. This utility model can simultaneously clamp and position multiple workpieces, and can also clamp and position the workpieces from above, thereby improving the positioning effect of the workpieces.

[0004] When machining workpieces using CNC, it is usually necessary to clamp and position a variety of workpieces of different sizes. Since the clamping dimensions of existing clamping fixtures are relatively limited, they are mostly used to clamp and fix specific and single workpieces. When clamping workpieces of different sizes, it is necessary to frequently change and install clamping fixtures of different sizes, which leads to the problem of inconvenience in quickly machining workpieces. Utility Model Content

[0005] The purpose of this invention is to solve the problem that in the prior art, when using CNC to process workpieces, it is usually necessary to clamp and position a variety of workpieces of different sizes. Since the clamping size of the existing clamping fixtures is relatively simple, they are mostly used to clamp and fix a specific and single workpiece. When it is necessary to clamp workpieces of different sizes, it is necessary to frequently change and install clamping fixtures of different sizes, which leads to the inconvenience of quickly processing workpieces.

[0006] To solve the above technical problems, this utility model provides a CNC quick clamping fixture, including: a base, a workpiece, a clamping device, and two auxiliary devices. The workpiece is fixedly connected to the base by means of the clamping device. The clamping device includes a support frame and an auxiliary pad. The lower end of the support frame is fixedly connected to the base. A support plate is fixedly connected to the inner wall surface of the support frame. A rotating rod is rotatably connected to the inner wall of the support plate. A first bevel gear is fixedly connected to one end of the rotating rod. A rotating column is rotatably connected to the inner wall surface of the support plate. A second bevel gear is fixedly connected to one end of the rotating column. The tooth surface of the second bevel gear meshes with the tooth surface of the first bevel gear. An adjusting wheel is fixedly connected to the arc surface of the rotating column. Slide rails are fixedly connected to both sides of the inner wall surface of the support frame. A slider is slidably connected to the surface of the slide rail. A toothed block is fixedly connected to the surface of the slider. The toothed surfaces of the two toothed blocks mesh with the toothed surface of the same adjusting wheel. The toothed block is fixedly connected to one side of a movable rod, the movable rod having an "L"-shaped cross-section. The support frame surface has grooves corresponding to the long arm ends of the two movable rods. The inner wall of the groove is slidably connected to the movable rod. A guide rod is fixedly connected to the inner wall of the groove, the arc surface of the guide rod being slidably connected to the movable rod. A connecting arm is fixedly connected to one side of the long arm end of the movable rod, the connecting arm having a hook-shaped cross-section. A clamping block is fixedly connected to one end of the connecting arm. An auxiliary pad, a rubber pad, is fixedly connected to the clamping block via an auxiliary device. The two auxiliary pads, with their closest sides abutting against the same workpiece, are connected to the inner wall surface of the support frame. A lead screw is threaded through the inner wall of the fixed plate. A locking block is rotatably connected to one end of the lead screw, the surface of the locking block engaging with an adjusting wheel. A limit rod is fixedly connected to one side of the locking block, the arc surface of the limit rod being slidably connected to the fixed plate.

[0007] The aforementioned components achieve the following effects: When a workpiece needs to be clamped, rotating the lead screw causes the clamping block to move away from the adjusting wheel with the help of the limit rod. Then, rotating the rotating rod drives the first bevel gear transmission, causing the second bevel gear to rotate, which in turn drives the adjusting wheel to rotate. This causes the two gear blocks to move synchronously relative to each other along the slide rail, thereby clamping the workpiece through the moving rod and connecting arm. Then, rotating the lead screw in the opposite direction causes the clamping block to engage with the adjusting wheel, fixing the adjusting wheel and thus fixing the workpiece. The guide rod and slide groove ensure that the moving rod moves smoothly and prevents deflection. The rubber pad protects the workpiece surface and prevents scratches on the workpiece.

[0008] Preferably, a handwheel is fixedly connected to one end of the lead screw, and the handwheel has a circular cross-section.

[0009] The effects achieved by the above components are: the handwheel is easy to hold and rotate, allowing the operator to easily adjust the position of the lead screw, thereby quickly locking or releasing the adjustment wheel, improving operating efficiency and convenience.

[0010] Preferably, a plurality of anti-slip patterns are formed on the arc surface of one end of the rotating rod, and the plurality of anti-slip patterns are evenly distributed on the arc surface of one end of the rotating rod.

[0011] The effect achieved by the above components is as follows: the anti-slip groove increases the friction on the surface of the rotating rod, prevents the hand from slipping during operation, ensures stable and reliable rotation, and improves operational safety.

[0012] Preferably, the cross-section of the card block is wedge-shaped, and the card block is a stainless steel block.

[0013] The aforementioned components achieve the following effects: the wedge-shaped design makes it easier for the locking block to engage between the gear teeth, achieving a tight lock; the stainless steel material provides good wear resistance and corrosion resistance, extending service life and ensuring reliability under long-term use.

[0014] Preferably, the auxiliary device is located at the position of the clamping block corresponding to the auxiliary pad. The auxiliary device includes two guide blocks, one side of which is fixedly connected to the same auxiliary pad. A guide groove is opened on one side of the clamping block corresponding to the position of the guide block. The inner wall of the guide groove is inserted into the guide block. Two clamping plates are fixedly connected to the surface of the auxiliary pad. The cross-section of the clamping plates is U-shaped. The inner wall of the clamping plates abuts against the clamping block. A screw is threaded through the inner wall of one end of the clamping plate. The arc surfaces of the two screws are threadedly connected to the same clamping block.

[0015] The above components achieve the following effects: the guide block and guide groove work together to ensure the auxiliary pad is positioned quickly and accurately; the clamping plate and screw structure firmly fix the auxiliary pad to the clamping block, making it easy to install, replace and maintain the auxiliary pad.

[0016] Preferably, a handle is fixedly connected to one end of the screw, and the handle has a circular cross-section.

[0017] The effects achieved by the above components are: the handle provides an easy-to-operate manual rotation point, allowing the screw to be tightened or loosened without additional tools, simplifying the replacement process of the auxiliary pad, and improving work efficiency.

[0018] Preferably, two stops are fixedly connected to one side of the clamping block, and one side of the two stops abuts against the auxiliary pad.

[0019] The effect achieved by the above components is that the stop block moves the guide block on the auxiliary pad to a certain position in the guide groove and then stops. At this time, the screw can be inserted into the inner wall of the clamping block, which is convenient for operation.

[0020] Compared with related technologies, the CNC quick clamping fixture provided by this utility model has the following beneficial effects:

[0021] This invention provides a CNC quick clamping fixture. When clamping a workpiece, first place the workpiece on the support frame, then rotate the handwheel to move the lead screw away from the adjusting wheel until the clamping block no longer engages with the teeth of the adjusting wheel. Simultaneously, the limit rod slides along the inner wall of the fixed plate, allowing the adjusting wheel to rotate freely. Next, rotate the rotating rod, causing the first bevel gear at its end to rotate. The first bevel gear meshes with the second bevel gear fixed on the rotating column, causing the rotating column and the adjusting wheel to rotate together. The rotation of the adjusting wheel causes two toothed blocks to move in opposite directions along the slide rail, moving the moving rod and connecting arm along the slide groove and guide rod. This moves the two clamping blocks closer together until the auxiliary pads on the clamping blocks are in close contact with the workpiece. Then, rotate the handwheel in the opposite direction to move the lead screw, pushing the clamping block until it engages with the adjusting wheel, thus fixing the adjusting wheel and clamping the workpiece. By operating the clamping device, the workpiece is clamped and fixed.

[0022] When the auxiliary pad needs replacement due to wear, rotate the screw to disengage it from the clamping block. Then, pull the auxiliary pad, along with the guide block, directly out of the guide groove in the clamping block. Align the guide block on the back of the new auxiliary pad with the guide groove on the clamping block and insert it until the stop block on the clamping block abuts against the auxiliary pad. At this point, the screw should be able to insert into the inner wall of the clamping block. Then, tighten the screw using the handle to insert it into the clamping block, thus fixing the auxiliary pad onto the clamping block and completing the replacement. By operating the auxiliary device, the auxiliary pad can be replaced. Attached Figure Description

[0023] Figure 1 A schematic diagram of the structure of a CNC quick clamping fixture provided by this utility model;

[0024] Figure 2 for Figure 1 A partial structural schematic diagram of the clamping device is shown;

[0025] Figure 3 for Figure 2 A partial structural schematic diagram of the clamping device is shown;

[0026] Figure 4 for Figure 1 A partial structural schematic diagram of the auxiliary device shown.

[0027] The following are the labeling elements in the diagram: 1. Base; 2. Workpiece; 3. Clamping device; 301. Support frame; 302. Clamping block; 303. Connecting arm; 304. Moving rod; 305. Guide rod; 306. Slide groove; 307. Support plate; 308. Rotating rod; 309. First bevel gear; 310. Second bevel gear; 311. Rotating column; 312. Adjusting wheel; 313. Gear block; 314. Slider; 315. Slide rail; 316. Fixing plate; 317. Lead screw; 318. Limiting rod; 319. Locking block; 320. Handwheel; 321. Auxiliary pad; 322. Anti-slip texture; 4. Auxiliary device; 41. Guide groove; 42. Guide block; 43. Locking plate; 44. Screw; 45. Handle; 46. Stop block. Detailed Implementation

[0028] 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.

[0029] The specific implementation of this utility model will be described in detail below with reference to specific embodiments.

[0030] Please see Figures 1 to 4 The present invention provides a CNC quick clamping fixture, comprising: a base 1, a workpiece 2, a clamping device 3 and two auxiliary devices 4, wherein the workpiece 2 is fixedly connected to the base 1 by means of the clamping device 3;

[0031] In the embodiments of this utility model, please refer to Figure 2 and Figure 3The clamping device 3 includes a support frame 301 and an auxiliary pad 321. The lower end of the support frame 301 is fixedly connected to the base 1. A support plate 307 is fixedly connected to the inner wall surface of the support frame 301. A rotating rod 308 is rotatably connected to the inner wall of the support plate 307. A first bevel gear 309 is fixedly connected to one end of the rotating rod 308. A rotating column 311 is rotatably connected to the inner wall surface of the support plate 307. A second bevel gear 310 is fixedly connected to one end of the rotating column 311. The tooth surface of the second bevel gear 310 is... The teeth of the first bevel gear 309 mesh with each other. An adjusting wheel 312 is fixedly connected to the arc surface of the rotating column 311. Slide rails 315 are fixedly connected to both sides of the inner wall surface of the support frame 301. A slider 314 is slidably connected to the surface of the slide rail 315. Tooth blocks 313 are fixedly connected to the surface of the slider 314. The tooth surfaces of the two tooth blocks 313 mesh with the tooth surfaces of the same adjusting wheel 312. A moving rod 304 is fixedly connected to one side of the tooth block 313. The cross-section of the moving rod 304 is "L" shaped. Surface 301 has grooves 306 at the long arm ends of the two moving rods 304. The inner wall of the groove 306 is slidably connected to the moving rod 304. A guide rod 305 is fixedly connected to the inner wall of the groove 306. The arc surface of the guide rod 305 is slidably connected to the moving rod 304. A connecting arm 303 is fixedly connected to one side of the long arm end of the moving rod 304. The cross-section of the connecting arm 303 is barbed. A clamping block 302 is fixedly connected to one end of the connecting arm 303. The auxiliary pad 321 is connected to the clamping block 302 with the aid of the auxiliary device 4. 02 Fixed connection, auxiliary pad 321 is a rubber pad, the side of the two auxiliary pads 321 that is close to each other abuts against the same workpiece 2, the inner wall surface of the support frame 301 is fixedly connected to a fixing plate 316, the inner wall of the fixing plate 316 is threaded through a lead screw 317, one end of the lead screw 317 is rotatably connected to a locking block 319, the surface of the locking block 319 is engaged with the adjusting wheel 312, one side of the locking block 319 is fixedly connected to a limiting rod 318, the arc surface of the limiting rod 318 is slidably connected to the fixing plate 316. When workpiece 2 needs to be clamped, rotating the lead screw 317 causes the locking block 319 to move away from the adjusting wheel 312 with the help of the limiting rod 318. Then, rotating the rotating rod 308 drives the first bevel gear 309 to drive the second bevel gear 310 to rotate, which in turn drives the adjusting wheel 312 to rotate. This causes the two gear blocks 313 to move synchronously relative to the slider 314 along the slide rail 315, thereby driving the clamping block 302 to clamp workpiece 2 through the moving rod 304 and the connecting arm 303. Then, rotating the lead screw 317 in the opposite direction causes the locking block 319 to engage with the adjusting wheel 312, fixing the adjusting wheel 312 and thus fixing workpiece 2. The guide rod 305 and the slide groove 306 ensure that the moving rod 304 moves smoothly and prevents deflection. The rubber pad protects the surface of workpiece 2 and prevents scratches on workpiece 2. A handwheel 320 is fixedly connected to one end of the lead screw 317. The handwheel 320 has a circular cross-section. The handwheel 320 is easy to hold and rotate, allowing the operator to easily adjust the position of the lead screw 317, thereby quickly locking or releasing the adjusting wheel 312, improving operating efficiency and convenience.The rotating rod 308 has several anti-slip grooves 322 evenly distributed on one end of its arc surface. These grooves increase the friction on the surface of the rotating rod 308, preventing hand slippage during operation, ensuring stable and reliable rotation, and improving operational safety. The locking block 319 has a wedge-shaped cross-section and is made of stainless steel. The wedge design makes it easier for the locking block 319 to engage with the gear teeth for a tight lock; the stainless steel material provides good wear resistance and corrosion resistance, extending service life and ensuring reliability over long-term use.

[0032] In the embodiments of this utility model, please refer to Figure 1 and Figure 4 The auxiliary device 4 is located at the position of the clamping block 302 corresponding to the auxiliary pad 321. The auxiliary device 4 includes two guide blocks 42, one side of which is fixedly connected to the same auxiliary pad 321. A guide groove 41 is opened on one side of the clamping block 302 corresponding to the position of the guide block 42. The inner wall of the guide groove 41 is inserted into the guide block 42. Two clamping plates 43 are fixedly connected to the surface of the auxiliary pad 321. The cross-section of the clamping plates 43 is "U" shaped. The inner wall of the clamping plates 43 abuts against the clamping block 302. A screw 44 is threaded through the inner wall of one end of the clamping plate 43. The arc surfaces of the two screws 44 are threadedly connected to the same clamping block 302. The guide blocks 42 and guide grooves 41 cooperate to ensure that the auxiliary pad 321 is quickly and accurately positioned. The structure of the clamping plates 43 and screws 44 firmly fixes the auxiliary pad 321 to the clamping block 302, which facilitates the installation, replacement and maintenance of the auxiliary pad 321. A handle 45 is fixedly connected to one end of the screw 44. The cross-section of the handle 45 is circular. The handle 45 provides an easy-to-operate manual rotation point, allowing for tightening or loosening of the screw 44 without additional tools, simplifying the replacement process of the auxiliary pad 321 and improving work efficiency. Two stops 46 are fixedly connected to one side of the clamping block 302, with one side of each stop 46 abutting against the auxiliary pad 321. The stops 46 cause the guide block 42 on the auxiliary pad 321 to move to a certain position within the guide groove 41 and stop, at which point the screw 44 can be precisely inserted into the inner wall of the clamping block 302, facilitating operation.

[0033] The working principle of the CNC quick clamping fixture provided by this utility model is as follows: When it is necessary to clamp the workpiece 2, first place the workpiece 2 to be processed on the support frame 301, and then rotate the handwheel 320 so that the lead screw 317 drives the locking block 319 to move away from the adjusting wheel 312 until the locking block 319 and the tooth surface of the adjusting wheel 312 are no longer locked. At the same time, the limiting rod 318 is carried to slide along the inner wall of the fixed plate 316. At this time, the adjusting wheel 312 can rotate freely. Then, rotating the lever 308 causes the first bevel gear 309 at its end to rotate. The first bevel gear 309 meshes with the second bevel gear 310 fixed on the rotating column 311, thereby causing the rotating column 311 and the adjusting wheel 312 on it to rotate together. The rotation of the adjusting wheel 312 causes the two toothed blocks 313 to move in opposite directions along the slide rail 315, causing the moving rod 304 and the connecting arm 303 to move along the slide groove 306 and the guide rod 305. In this way, the two clamping blocks 302 move closer to each other until the auxiliary pad 321 on the clamping block 302 is in close contact with the workpiece 2. Then, the handwheel 320 is rotated in the opposite direction. The lead screw 317 pushes the locking block 319 to move until the locking block 319 engages with the adjusting wheel 312, thereby fixing the adjusting wheel 312. In this way, the workpiece 2 is clamped.

[0034] When the auxiliary pad 321 needs to be replaced due to wear, rotate the screw 44 to make the screw 44 rotate out of the clamping block 302, and then directly pull the auxiliary pad 321 together with the guide block 42 out of the guide groove 41 of the clamping block 302. Align the guide block 42 on the back of the new auxiliary pad 321 with the guide groove 41 on the clamping block 302 and insert it until the stop block 46 on the clamping block 302 abuts against the auxiliary pad 321. At this time, the screw 44 can be inserted into the inner wall of the clamping block 302. Then, tighten the screw 44 with the handle 45 to insert the screw 44 into the clamping block 302, and the auxiliary pad 321 can be fixed on the clamping block 302, completing the replacement.

[0035] The circuits and controls involved in this utility model are all existing technologies and will not be described in detail here.

[0036] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A CNC quick clamping fixture, characterized in that, include: The system comprises a base (1), a workpiece (2), a clamping device (3), and two auxiliary devices (4). The workpiece (2) is fixedly connected to the base (1) by means of the clamping device (3). The clamping device (3) includes a support frame (301) and an auxiliary pad (321). The lower end of the support frame (301) is fixedly connected to the base (1). A support plate (307) is fixedly connected to the inner wall surface of the support frame (301). A rotating rod (308) is rotatably connected to the inner wall of the support plate (307). A first bevel gear (309) is fixedly connected to one end of the rotating rod (308). A rotating column (311) is rotatably connected to the inner wall surface of the support plate (307). A second bevel gear (310) is fixedly connected to one end of the rotating column (311). The tooth surface of the second bevel gear (310) meshes with the tooth surface of the first bevel gear (309). An adjusting wheel (312) is fixedly connected to the arc surface of the rotating column (311). Slide rails (315) are fixedly connected to both sides of the inner wall surface of the support frame (301). A slider (314) is slidably connected to the surface of the slide rail (315). A toothed block (313) is fixedly connected to the surface of the slider (314). The toothed surfaces of the two toothed blocks (313) mesh with the toothed surface of the same adjusting wheel (312). A moving rod (30) is fixedly connected to one side of the toothed block (313). 4) The cross-section of the movable rod (304) is "L" shaped. The surface of the support frame (301) has grooves (306) corresponding to the long arm ends of the two movable rods (304). The inner wall of the groove (306) is slidably connected to the movable rod (304). A guide rod (305) is fixedly connected to the inner wall of the groove (306). The arc surface of the guide rod (305) is slidably connected to the movable rod (304). A connecting arm (303) is fixedly connected to one side of the long arm end of the movable rod (304). The cross-section of the connecting arm (303) is hook-shaped. A clamping block (302) is fixedly connected to one end of the connecting arm (303). The auxiliary pad (321) uses... The auxiliary device (4) is fixedly connected to the clamping block (302). The auxiliary pad (321) is a rubber pad. The two auxiliary pads (321) are close to each other on one side and abut against the same workpiece (2). The inner wall surface of the support frame (301) is fixedly connected to a fixing plate (316). The inner wall of the fixing plate (316) is threaded through a lead screw (317). One end of the lead screw (317) is rotatably connected to a locking block (319). The surface of the locking block (319) is engaged with the adjusting wheel (312). One side of the locking block (319) is fixedly connected to a limiting rod (318). The arc surface of the limiting rod (318) is slidably connected to the fixing plate (316).

2. The CNC quick clamping fixture according to claim 1, wherein, One end of the lead screw (317) is fixedly connected to a handwheel (320), and the cross-section of the handwheel (320) is circular.

3. The CNC quick clamping fixture of claim 1, wherein, The rotating rod (308) has a plurality of anti-slip patterns (322) on one end of its arc surface, and the plurality of anti-slip patterns (322) are evenly distributed on one end of the arc surface of the rotating rod (308).

4. The CNC quick clamping fixture of claim 1, wherein, The cross-section of the card block (319) is wedge-shaped, and the card block (319) is a stainless steel block.

5. The CNC quick clamping fixture of claim 1, wherein, The auxiliary device (4) is located at the position of the clamping block (302) corresponding to the auxiliary pad (321). The auxiliary device (4) includes two guide blocks (42). One side of the two guide blocks (42) is fixedly connected to the same auxiliary pad (321). A guide groove (41) is opened on one side of the clamping block (302) corresponding to the position of the guide block (42). The inner wall of the guide groove (41) is inserted into the guide block (42). Two clamping plates (43) are fixedly connected to the surface of the auxiliary pad (321). The cross-section of the clamping plate (43) is "U". The inner wall of the clamping plate (43) abuts against the clamping block (302). A screw (44) is threaded through the inner wall of one end of the clamping plate (43). The arc surfaces of the two screws (44) are threadedly connected to the same clamping block (302).

6. The CNC quick clamping fixture of claim 5, wherein, One end of the screw (44) is fixedly connected to a handle (45), and the handle (45) has a circular cross-section.

7. The CNC quick clamping fixture of claim 5, wherein, Two stops (46) are fixedly connected to one side of the clamp (302), and one side of the two stops (46) abuts against the auxiliary pad (321).

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