Clamping assembly capable of achieving quick release in machine tool machining and using method

Abstract

The invention provides a quick-release clamping assembly for machine tool machining and a using method, and belongs to the technical field of machine tool machining. The clamping assembly comprises a fixing base, a strip-shaped sliding hole is formed in the fixing base, the bottom of the clamping plate assembly is installed in the strip-shaped sliding hole, the clamping plate assembly can freely slide in the strip-shaped sliding hole, the first baffle and the second baffle are installed at the ends, on the two sides of the clamping plate assembly, of the fixing base respectively, a bracket is installed at the bottom of the fixing base, and a limiting assembly is installed on the bracket. The clamping plate assembly comprises a clamping plate body, a band-type brake mechanism is arranged in a first sliding block at the bottom of the clamping plate body, and limiting is achieved when the band-type brake mechanism interacts with the limiting mechanism, so that the clamping plate assembly can be limited at any position within the movement range. A workpiece is clamped and fixed by arranging the limiting assembly, the clamping plate body can be limited at any position within the movement range of the clamping plate body, and the stepless adjustment effect is achieved.

Description

Technical Field

[0001] The invention relates to the technical field of machine tool processing, and in particular to a clamping component for quick release in machine tool processing and a use method thereof. Background Art

[0002] Machine tool processing relies on the machine tool to ensure the relative motion relationship between the tool and the fixture, and uses the tool or other tools to process the workpiece installed on the fixture. At present, the manual fixtures on the machine tool mainly drive the two clamps to move and clamp by screwing. When releasing the workpiece, the movement of the clamp is slow, thereby reducing the release speed of the workpiece.

[0003] Application number CN202322753411.3, invention name A machine tool processing quick release clamping assembly, including a clamping plate, the second supporting plate is inserted into the first supporting plate, the lower end of the clamping plate is respectively provided with hollow rods at the front and rear, and another group of clamping plates are correspondingly provided with telescopic rods at the front and rear. The clamping plates of the machine tool processing quick release clamping assembly are elastically telescopically structured by the second spring and the first fixed plate, so that when the engaging rod is separated from the through hole, the two groups of clamping plates are relatively moved outward under the action of the second spring, thereby increasing the release speed of the device to the workpiece, the limiting rod of the device is formed into a rotating structure with the first fixed plate through the second rotating rod, and the limiting rod is formed into an elastic engaging limiting structure with the concave fixed block in the limiting hole through the elastic fiber block, so that the upper part of the workpiece is limited and blocked by the limiting rod, thereby preventing the workpiece from being violently displaced by external force during the release of the clamping plate.

[0004] However, the above-mentioned machine tool machining quick release clamping assembly still has some shortcomings during use, such as: locking by means of a limit hole and a limit rod for engagement and limiting. When the different sizes of the workpieces cause the limit holes to be misaligned after the clamping plate clamps the workpiece, the limit rod cannot be inserted, resulting in limited clamping of the workpiece; after the workpiece is placed, the two clamping plates are brought close to each other by manual squeezing. When locking, continuous force is required to maintain the position of the clamping plates, which is relatively laborious and can easily lead to a gap between the workpiece and the clamping plates, resulting in loose clamping; when the lock is released to release the workpiece, the instantaneous rebound of the clamping assembly can easily cause the clamping plates to collide with other components.

[0005] In summary, a quick-release clamping assembly for machine tool processing cannot clamp workpieces of different sizes, cannot clamp workpieces of different sizes at any position, and cannot achieve the effect of stepless adjustment. Summary of the invention

[0006] The purpose of the present invention is to solve the defects of the above-mentioned prior art and provide a clamping assembly for quick release in machine tool processing and a method for using the clamping assembly.

[0007] The present invention uses this device to work, and solves the problem that when locking is performed by means of engaging and limiting the limit holes and the limit rods, when the sizes of the workpieces are different, the limit holes are misaligned after the clamping plate clamps the workpiece, and the limit rod cannot be inserted, which results in the two clamping plates being brought close to each other by manual squeezing after the workpiece is placed, and the position of the clamping plates needs to be continuously applied when locking. And it is easy to cause a gap between the workpiece and the clamping plate, which leads to a loose clamping situation; when the workpiece is released, the clamping assembly is instantly opened, which is easy to cause the clamping plate to collide with other components.

[0008] The present invention adopts the following technical solution:

[0009] A clamping assembly for quick release in machine tool processing comprises a fixed seat, a strip sliding hole is opened on the fixed seat, the bottom of the clamping plate assembly is installed in the strip sliding hole, the clamping plate assembly can slide freely on the strip sliding hole, a first baffle plate and a second baffle plate are respectively installed on the ends of the fixed seat on both sides of the clamping plate assembly, a bracket is installed at the bottom of the fixed seat, a limiting assembly is installed on the bracket, the clamping plate assembly comprises a clamping plate body, a brake mechanism is provided in the first sliding block at the bottom of the clamping plate body, and limiting is achieved when the brake mechanism interacts with the limiting mechanism, so that the clamping plate assembly can be limited at any position within the range of motion.

[0010] Furthermore, the limit assembly includes a limit shaft, a first slider is sleeved on the limit shaft, a second slide groove is opened on the limit shaft, a drive block is sleeved on the outer wall of the limit shaft, a second drive key is provided on the inner ring wall of the drive block corresponding to the second slide groove, and an arc hole is opened on the side wall of the drive block.

[0011] Furthermore, the brake mechanism includes a fixed ring symmetrically fixedly connected to the concave structure on the bottom surface of the first slider, and a plurality of mounting slot blocks are fixedly connected to the end surfaces of the two fixed rings. The plurality of mounting slot blocks are arranged in a circular array, and a freely sliding moving block is installed in the inner cavity of each mounting slot block. One side wall of the moving block is connected to the inner cavity wall of the mounting slot block via a tightening spring, and a connecting rod is fixedly connected to the other side wall of the moving block. The other end of the connecting rod passes through the side wall of the mounting slot block and is connected to the limit block. A driving rod is commonly fixedly connected between the two symmetrical moving blocks, and the driving rod is sleeved on the arc-shaped hole of the driving block. When the driving rod moves, it can simultaneously drive the moving blocks symmetrically at both ends to move, thereby realizing the operation of synchronously driving the limit blocks to clamp or release.

[0012] Furthermore, a side wall of the clamping plate assembly is fixedly connected to one end of the push-pull rod away from the second baffle plate. A through hole is provided on the first baffle plate, a bearing is installed in the through hole, a gear ring is installed on the inner ring of the bearing, the gear ring can rotate freely, and the other end of the push-pull rod passes through the hole of the gear ring. The inner wall of the gear ring has a first drive key, and the push-pull rod has a first slide groove that cooperates with the first drive key. The gear ring is meshed with a gear installed at one end of the limit rod.

[0013] Furthermore, a release spring connects the first baffle plate with the clamping plate assembly, and the release spring is sleeved on the push-pull rod. A locking assembly is also provided between the clamping plate assembly and the second baffle plate. The locking assembly includes a locking plate. The bottom of the locking plate is installed in the strip slide groove, and the locking assembly can freely slide on the strip slide groove. A guide rod is also installed at the bottom of the fixed seat. The second slider at the bottom of the clamping plate assembly and the third slider at the bottom of the locking assembly are both sleeved on the guide rod, and an L-shaped slider is connected to the bottom of the second slider. The third slider is located in the L-shaped slider. One end of the tensioning spring is connected to the third slider, and the other end passes through the hole on the L-shaped slider and is connected to the second baffle plate.

[0014] Furthermore, an anti-accidental touch mechanism is installed at the other end of the limit shaft, and the anti-accidental touch structure includes a mounting frame fixedly connected to the bracket, a torsion spring fixedly connected to the inner ring side wall of the mounting frame, the limit shaft is installed in the inner ring of the torsion spring, and two blocks are provided on the end face of the mounting frame. A back plate is provided on the outer wall of one end of the limit shaft close to the mounting frame, and the back plate is arranged between the two blocks. One end of the torsion spring is fixedly connected to the side wall of the back plate, and the rotation range of the limit shaft is limited by the two blocks.

[0015] It further includes a buffer assembly, which includes a piston mechanism that passes through and is fixedly connected to the side wall of the first baffle, the piston mechanism has a built-in piston, the piston in the piston mechanism is connected to a piston rod, one end of the piston rod is fixedly connected to the side wall of the splint body, one end of the piston chamber of the piston mechanism is fixedly connected to a telescopic tube, the other end of the telescopic tube is fixedly connected to a buffer chamber, the buffer chamber is fixedly connected to the side wall of the splint body, and an air outlet is opened on the outer wall of the buffer chamber.

[0016] Another object of the present invention is to provide a method for using a quick-release clamping assembly for machining a machine tool, comprising:

[0017] Step 1. The locking plate is in a pulled-out state under the action of the L-shaped pull plate, and the workpiece is placed between the locking plate of the fixed seat and the second baffle.

[0018] Step 2. Rotate the push-pull rod to drive the ring gear to rotate through the cooperation of the first slide groove and the first drive key. Under the meshing action of the ring gear and the gear, the limit shaft rotates a certain angle, the second slide groove and the second drive key interact with each other, the drive block rotates synchronously with the limit shaft, the arc hole acts on the drive rod, the moving block drives the connecting rod and the limit block to move and compress the clamping spring, so that the limit block is disconnected from the limit shaft and the limit is released.

[0019] Step 3. Push the push-pull rod forward to drive the clamping plate body close to the workpiece. The locking assembly quickly retracts under the action of the tension spring to pre-clamp the workpiece. Continue to push the push-pull rod until the clamping plate assembly clamps the workpiece. During this process, the piston rod of the buffer assembly is pulled out and the piston chamber inhales gas.

[0020] Step 4. Reverse the push-pull rod to limit the clamp body and fix the workpiece.

[0021] Step 5. After the workpiece is processed, turn the push-pull rod to release the limit. The clamping plate assembly is pulled back under the action of the release spring to quickly release the workpiece. At the same time, the piston rod acts in the opposite direction on the piston chamber of the buffer assembly to slow down the force of the release spring. The gas in the piston chamber is blown out from the air port to clean the cut workpiece debris on the workbench.

[0022] Furthermore, when the push-pull rod is rotated, the abutment plate moves between the two stoppers of the anti-mistaken touch mechanism to limit the rotation range of the push-pull rod. After rotating back, the abutment plate acts on the torsion spring of the anti-mistaken touch mechanism, so that the push-pull rod will not rotate easily.

[0023] Beneficial effects of the present invention:

[0024] By setting a limit assembly, the limit block and the limit shaft are disengaged and abutted against each other after the push-pull rod is rotated to a certain angle. At this time, pushing forward can drive the clamp body close to the workpiece. After it is tightly pressed, the thrust is maintained and the push-pull rod is rotated in the opposite direction to return to its initial position. The clamp body can be limited again, so that the workpiece can be clamped and fixed. The clamp body can be limited at any position within its active range, achieving a stepless adjustment effect.

[0025] By setting up a locking assembly and an anti-accidental touch mechanism, when the clamp body moves close to the workpiece, the locking plate gradually retracts under the action of the tensioning spring and first presses against the side wall of the workpiece, and the second baffle of the workpiece is pre-tightened by the elastic force, so that the workpiece can be pre-fixed before the clamp body is limited, avoiding its displacement before complete limitation.

[0026] After the limit is completed, under the action of the torsion spring, the push-pull rod will not rotate easily when it is collided, thereby ensuring that the workpiece is clamped stably during the processing. By setting a buffer assembly, during the process of pushing the splint body forward, the splint body can also drive the movement of the piston rod, so that the external gas is sucked into the piston chamber inside the piston mechanism through the telescopic tube. When the splint body is pulled back by the release spring, the gas inside the piston mechanism is squeezed out, thereby buffering the impact when the splint body retracts. At the same time, the squeezed gas can also blow away the workpiece debris remaining on the fixture during processing, reducing the frequency of cleaning by the staff, thereby improving the processing efficiency of the workpiece. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the overall structure of the present invention from a top perspective;

[0028] Figure 2 It is a schematic diagram of the overall structure of the present invention from a bottom perspective;

[0029] Figure 3 It is a schematic diagram of the overall structure of the present invention after removing the push-pull rod and the clamping plate assembly components;

[0030] Figure 4 For the present invention Figure 3 A magnified schematic diagram of the structure of part A;

[0031] Figure 5 It is a schematic diagram of the connection structure of the push-pull rod, the clamping plate assembly and the limit assembly in the present invention;

[0032] Figure 6 It is a structural schematic diagram of the brake mechanism part of the present invention;

[0033] Figure 7 For the present invention Figure 6 A magnified schematic diagram of the structure of part B;

[0034] Figure 8 It is a schematic structural diagram of the driving block part in the present invention;

[0035] Fig. 9 It is a structural schematic diagram of the anti-mistouch mechanism part of the present invention;

[0036] Fig.10 It is a schematic diagram of the connection structure between the locking assembly and the clamping plate assembly in the present invention;

[0037] Fig.11 It is a schematic structural diagram of the buffer component part in the present invention.

[0038] In the figure: 1-fixed seat, 2-strip sliding hole, 3-clamping plate assembly, 31-clamping plate body, 32-first slider, 33-second slider, 34-L-shaped pull plate, 35-brake mechanism, 351-fixed ring, 352-installation slot block, 353-moving block, 354-tightening spring, 355-connecting rod, 356-limiting block, 357-driving rod, 4-first baffle, 41-through hole, 42-bearing, 5-second baffle, 6-release spring, 7-gear ring, 71-first driving key, 8-push-pull rod, 81-first slide groove, 9-bracket, 10- Limiting assembly, 101-limiting shaft, 1011-second slide groove, 1012-retaining plate, 102-gear, 103-driving block, 1031-second driving key, 1032-arc hole, 104-anti-mistouch mechanism, 1041-mounting frame, 1042-torsion spring, 1043-block, 20-locking assembly, 201-locking plate, 202-third slider, 203-tension spring, 30-guide rod, 40-buffer assembly, 401-piston mechanism, 402-piston rod, 403-telescopic tube, 404-buffer chamber, 405-blowing port. DETAILED DESCRIPTION

[0039] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention is described clearly and completely below. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0040] In order to solve the problem that the different sizes of the locked workpieces cause the limit rod to be unable to be inserted when the clamping plate clamps the workpiece, resulting in the workpiece being not clamped firmly.

[0041] like Figure 1-Figure 9 As shown, a clamping assembly for quick release of machine tool processing of the present invention comprises a fixed seat 1, the bottom surface of the fixed seat 1 is a concave structure, three strip-shaped sliding holes 2 are provided on the top surface of the fixed seat 1, the three strip-shaped sliding holes 2 are provided in parallel with each other, a clamping plate assembly 3 is slidably connected with the three strip-shaped sliding holes 2, and the workpiece is clamped by moving the clamping plate assembly 3 and cooperating with the second baffle 5. A first baffle 4 and a second baffle 5 are respectively fixed on the top surface of the fixed seat 1 and at both ends of the strip-shaped sliding holes 2, and the first baffle 4 and the second baffle 5 are used for limiting to prevent a large displacement of the workpiece when it is released.

[0042] The side wall of the clamping plate assembly 3 is elastically connected to the side wall of the first baffle 4 by a release spring 6, so that after the clamping plate assembly 3 is released from the limit, the release spring 6 can pull the clamping plate assembly 3 back to achieve a quick release of the workpiece. A freely rotatable ring gear 7 is installed on the side wall of the first baffle 4 facing away from the second baffle 5. A push-pull rod 8 passes through the first baffle 4, the ring gear 7, and the release spring 6, and the other end is fixed on the clamping plate 3, and the push-pull rod 8 can slide freely in the ring gear 7.

[0043] A bracket 9 is fixedly connected to the bottom surface of the fixing seat 1 , a rotatable limiting assembly 10 is mounted on the side wall of the bracket 9 , and one end of the limiting assembly 10 is meshed and connected with the gear ring 7 via a gear.

[0044] The bottom of the clamping plate assembly 3 is connected to the bottom of the locking assembly 20. The ring gear 7 is driven to rotate by rotating the push-pull rod 8, and then the limiting assembly 10 can be driven to operate through meshing to achieve the limiting of the clamping plate assembly 3. The guide rods 30 are symmetrically fixed on the side walls of the concave structure on the bottom surface of the fixed seat 1. The bottom ends of the clamping plate assembly 3 and the locking assembly 20 are both installed on the guide rods 30, and the clamping plate assembly 3 and the locking assembly 20 can slide on the guide rods 30. The locking assembly 20 can preliminarily lock the workpiece before the clamping plate assembly 3 is limited, so as to prevent it from moving before it is completely limited, which affects the positioning accuracy after clamping.

[0045] A pair of buffer assemblies 40 are symmetrically mounted on the first baffle 4, and one end of the buffer assembly 40 is fixedly connected to the side wall of the clamping plate assembly 3. The buffer assembly 40 is used to buffer the impact generated when the clamping plate assembly 3 is released from the limit and pulled back by the release spring 6, so as to avoid strong collision with other components and cause damage.

[0046] Initially, the locking assembly 20 is in a pulled-out state under the action of the clamping plate assembly 3. When the workpiece is placed between the locking assembly 20 and the second baffle 5 on the fixed seat 1, and then the push-pull rod 8 is rotated to drive the gear ring 7 to rotate a certain angle, under the meshing action of the gear ring 7 and the limiting assembly 10, the limiting assembly 10 rotates a certain angle accordingly, and the limit on the clamping plate assembly 3 is released. At this time, the push-pull rod 8 is pushed forward to drive the clamping plate assembly 3 to approach the workpiece. At the same time, as the clamping plate assembly 3 moves, the locking assembly 20 quickly retracts under the action of the spring, and first abuts against the side wall of the workpiece. The workpiece and the second baffle plate 5 are tightened by elastic force, so that the workpiece can be pre-fixed before the clamping plate assembly 3 is limited, avoiding its displacement before complete limitation and affecting the final positioning accuracy. After the locking assembly 20 fixes the workpiece, the clamping plate assembly 3 continues to move and finally abuts against the locking assembly 20, and then maintains the thrust applied to the push-pull rod 8 and rotates in the opposite direction, so that the push-pull rod 8 rotates to the initial angle. At this time, the limiting assembly 10 limits the clamping plate assembly 3 again, and after the thrust is removed, the push-pull rod 8 will not be pulled back by the release spring 6, thereby achieving clamping of the workpiece.

[0047] When the workpiece is processed on the machine tool, the limit of the clamping plate assembly 3 can be released by rotating the push-pull rod 8. At this time, the clamping plate assembly 3 is quickly pulled back under the action of the release spring 6. When the clamping plate assembly 3 is pulled back, the locking assembly 20 is also pulled out, thereby realizing the rapid release of the workpiece and ensuring that the clamping plate assembly 3 is limited at any position within its active range. Compared with the limiting method combining the limiting hole and the limiting rod, it will not cause the two limiting holes to be misaligned due to the different sizes of the workpieces, and the limiting rod will not be unable to penetrate.

[0048] During the process of pushing the clamping plate assembly 3 forward, the clamping plate assembly 3 can also drive the movable end of the buffer assembly 40 to move, so that external gas is sucked into the buffer assembly 40. When the clamping plate assembly 3 is pulled back by the release spring 6, the gas inside the buffer assembly 40 is squeezed out, thereby being able to cushion the impact when the clamping plate assembly 3 retracts. At the same time, the squeezed gas can also blow away the workpiece debris remaining on the fixture during processing, reducing the frequency of cleaning by the staff, thereby improving the processing efficiency of the workpiece.

[0049] The clamping plate assembly 3 includes a clamping plate body 31, a first slider 32 is fixedly connected to the middle of the bottom surface of the clamping plate body 31, and second sliders 33 are fixedly connected to both sides of the bottom surface of the clamping plate body 31. The upper parts of the first slider 32 and the second slider 33 are slidably connected to the corresponding strip-shaped sliding hole 2, and the lower part of the second slider 33 is slidably connected to the guide rod 30. An L-shaped pull plate 34 is fixedly connected to the bottom surface of the second slider 33, and the L-shaped side of the L-shaped pull plate 34 has a small hole, which is sleeved on the guide rod 30, and the aperture of the small hole is larger than the diameter of the guide rod, so that the inner wall of the small hole does not contact the outer surface of the guide rod 30. The bottom surface of the first slider 32 is a concave structure, and a brake mechanism 35 is installed in the concave structure of the bottom surface of the first slider 32.

[0050] The brake mechanism 35 includes a fixed ring 351 symmetrically fixedly connected to the concave structure on the bottom surface of the first slider 32, and a plurality of mounting slot blocks 352 are fixedly connected to the end surfaces of the two fixed rings 351. The plurality of mounting slot blocks 352 are arranged in a circular array, and a freely slidable moving block 353 is installed in the inner cavity of each mounting slot block 352. A side wall of the moving block 353 is connected to the inner cavity wall of the mounting slot block 352 via a clamping spring 354, and a connecting rod 355 is fixedly connected to the other side wall of the moving block 353. The other end of the connecting rod 355 passes through the side wall of the mounting slot block 352 and is connected to the limit block 356. A driving rod 357 is fixedly connected between the two symmetrical moving blocks 353. When the driving rod 357 moves, it can simultaneously drive the moving blocks 353 symmetrical at both ends to move, thereby synchronously driving the limit blocks 356 to perform clamping or releasing operations.

[0051] A through hole 41 is opened on the side wall of the first baffle 4, and a bearing 42 is fixedly installed in the through hole 41. The outer ring of the bearing 42 is fixed to the first baffle 4, and the inner ring of the bearing 42 can rotate freely. The ring gear 7 is fixedly installed on the inner ring of the bearing 42, thereby completing the rotational installation of the ring gear 7 on the first baffle 4. A symmetrical first drive key 71 is provided on the inner ring wall of the ring gear 7.

[0052] A first sliding groove 81 is provided on the outer wall of the push-pull rod 8 at a position corresponding to the first driving key 71. The first driving key 71 slides in cooperation with the first sliding groove 81. When the push-pull rod 8 moves, the first sliding groove 81 can move relative to the first driving key 71, thereby not interfering with the movement of the push-pull rod 8. When the push-pull rod 8 rotates, the first sliding groove 81 acts on the first driving key 71, thereby driving the gear ring 7 to rotate synchronously.

[0053] The limiting assembly 10 includes a limiting shaft 101 installed on the side wall of the bracket 9, the limiting shaft 101 can rotate freely on the bracket 9, the lower half of the first slider 32 is slidably connected to the limiting shaft 101, one end of the limiting shaft 101 is fixedly connected to a gear 102, the gear 102 is meshed with the ring gear 7, a second sliding groove 1011 is symmetrically opened on the side wall of the limiting shaft 101, a driving block 103 is provided on the upper sleeve of the limiting shaft 101, the driving block 103 can slide freely on the limiting shaft 101, and an anti-mistouch mechanism 104 is provided at one end of the limiting shaft 101 away from the gear 102.

[0054] A second driving key 1031 is connected to the position of the inner ring side wall of the driving block 103 corresponding to the second sliding groove 1011, and the second driving key 1031 slides in cooperation with the second sliding groove 1011. An arc-shaped hole 1032 is provided at the position of the driving block 103 corresponding to the driving rod 357, and each driving rod 357 passes through the corresponding arc-shaped hole 1032.

[0055] Specifically, the locking plate 201 is initially in a pulled-out state under the action of the L-shaped pull plate 34. When in use, the workpiece is placed between the locking plate 201 and the second baffle plate 5 on the fixed seat 1, and then the push-pull rod 8 is rotated. The push-pull rod 8 drives the ring gear 7 to rotate a certain angle through the cooperation of the first slide groove 81 and the first drive key 71. Under the meshing action of the ring gear 7 and the gear 102, the limit shaft 101 rotates a certain angle. Under the action of the second slide groove 1011 and the second drive key 1031, the driving block 103 rotates synchronously with the limit shaft 101, so that the arc hole 1032 acts on the driving rod 357, so that the moving block 353 drives the connecting rod 355 and the limit block 356 to move and compress the pressing spring 354, so that the limit block 356 is separated from the limit shaft 101 and released from the limit position of the clamp body 31.

[0056] At this time, the push-pull rod 8 is pushed forward to drive the clamp body 31 close to the workpiece. At the same time, as the clamp body 31 moves, the locking assembly 20 quickly retracts under the action of elastic force, which assists the push of the push-pull rod 8 and reduces the thrust that the operator needs to apply, so that the push-pull rod 8 is not likely to retract during the pushing process. After the push-pull rod 8 is pushed into place, the thrust is maintained and the push-pull rod 8 is reversed to rotate it to the initial angle, and the clamp body 31 is limited again, so that the workpiece can be clamped and fixed, and the clamp body 31 can be limited at any position within its range of motion, achieving the effect of stepless adjustment. Compared with the method of using a limit hole and a limit rod, it will not cause the two limit holes to be misaligned due to the different sizes of the workpiece, and the limit rod will not be able to penetrate.

[0057] When the workpiece is processed, the clamping plate body 31 is released from the limit by rotating the push-pull rod 8. Under the action of the release spring 6, the clamping plate body 31 drives the push-pull rod 8 to retract. When the clamping plate body 31 is pulled back, the locking assembly 20 is pulled out, thereby realizing the rapid release of the workpiece. This solves the problem that after the workpiece is placed, the two clamping plates are brought close to each other by manual squeezing, and when locking, continuous thrust is still required to maintain the position of the clamping plates, resulting in a gap between the workpiece and the clamping plates, and the clamping is not firm.

[0058] The anti-mistouch structure 104 includes a mounting frame 1041 fixedly connected to the bracket 9, a torsion spring 1042 is fixedly connected to the inner ring side wall of the mounting frame 1041, the limiting shaft 101 is installed in the inner ring of the torsion spring 1042, and two blocks 1043 are provided on the end face of the mounting frame 1041. A back plate 1012 is provided on the outer wall of one end of the limiting shaft 101 close to the mounting frame 1041, and the back plate 1012 is arranged between the two blocks 1043. One end of the torsion spring 1042 is fixedly connected to the side wall of the back plate 1012, and the rotation range of the limiting shaft 101 is limited by the two blocks 1043. Initially, the back plate 1012 is abutted against one of the blocks 1043, so that the back plate 1012 can only rotate in the other direction, thereby ensuring the accuracy of the operation.

[0059] The locking assembly 20 includes a locking plate 201, and a third slider 202 is symmetrically fixedly connected to the bottom surface of the locking plate 201. The upper parts of the two third sliders 202 are respectively installed in the two strip sliding holes 2 and can slide freely in the strip sliding holes 2. The lower parts of the two third sliders 202 both have small holes, and the small holes are sleeved on the guide rod 30. The third slider 202 is elastically connected to the side wall of the concave structure on the bottom surface of the fixed seat 1 away from the push-pull rod 8 through a tensioning spring 203, and the tensioning spring 203 is sleeved on the guide rod 30. The tensioning spring 203 passes through the small hole of the L-shaped pull plate 34 and does not contact its outer surface.

[0060] When the clamp body 31 moves closer to the workpiece, the locking plate 201 quickly retracts under the action of the tensioning spring 203 and first abuts against the side wall of the workpiece, and presses the workpiece and the second baffle 5 together through the elastic force, so that the workpiece can be pre-fixed before the clamp body 31 is limited, avoiding its displacement before complete limitation and affecting the final positioning accuracy. After the locking plate 201 tightens the workpiece, the clamp body 31 continues to move and finally abuts against the locking plate 201. At the same time, after the limitation is completed, under the action of the torsion spring 1042, when the push-pull rod 8 is collided, it will not rotate easily, thereby ensuring that the workpiece is clamped stably during the processing.

[0061] In order to solve the problem that the clamping plate collides with other parts due to the instantaneous spring of the clamping assembly when releasing the workpiece, such as Figure 10-11As shown, a buffer assembly 40 is provided. The buffer assembly 40 includes a piston mechanism 401 that penetrates and is fixedly connected to the side wall of the first baffle 4, the piston mechanism 401 has a built-in piston, the piston in the piston mechanism 401 is connected to a piston rod 402, one end of the piston rod 402 is fixedly connected to the side wall of the clamp body 31, one end of the piston chamber of the piston mechanism 401 is fixedly connected to a telescopic tube 403, the other end of the telescopic tube 403 is fixedly connected to a buffer chamber 404, the buffer chamber is fixedly connected to the side wall of the clamp body 31, and an air blowing port 405 is opened on the outer wall of the buffer chamber 404.

[0062] During the process of pushing the splint body 31 forward, the splint body 31 can also drive the movement of the piston rod 402, so that the external gas is sucked into one end of the piston chamber inside the piston mechanism 401 through the telescopic tube 403. When the splint body 31 is pulled back by the release spring 6, the gas inside the piston mechanism 401 is squeezed out, thereby being able to cushion the impact when the splint body 31 retracts. At the same time, the squeezed gas can also blow away the workpiece debris remaining on the fixture during processing, reducing the cleaning work of the staff, thereby improving the processing efficiency of the workpiece.

[0063] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A quick-release clamping assembly for machine tool processing, characterized in that: It includes a fixed seat, which is provided with a strip sliding hole. The bottom of the clamping plate assembly is installed in the strip sliding hole. The clamping plate assembly can slide freely on the strip sliding hole. The first baffle and the second baffle are respectively installed at the ends of the fixed seat on both sides of the clamping plate assembly. A bracket is installed at the bottom of the fixed seat, and a limiting assembly is installed on the bracket. The clamping plate assembly includes a clamping plate body. A brake mechanism is provided in the first slider at the bottom of the clamping plate body. When the brake mechanism interacts with the limiting mechanism, limiting is achieved, so that the clamping plate assembly can be limited at any position within the range of motion.

2. The clamping assembly according to claim 1, characterized in that: The limit assembly includes a limit shaft, a first slider is sleeved on the limit shaft, a second slide groove is opened on the limit shaft, a driving block is sleeved on the outer wall of the limit shaft, a second driving key is arranged on the inner ring wall of the driving block corresponding to the second slide groove, and an arc hole is opened on the side wall of the driving block.

3. The clamping assembly according to claim 2, characterized in that: The brake mechanism includes a fixed ring symmetrically fixedly connected to the concave structure on the bottom surface of the first slider, and a plurality of mounting slot blocks are fixedly connected to the end surfaces of the two fixed rings. The plurality of mounting slot blocks are arranged in a circular array, and a freely sliding moving block is installed in the inner cavity of each mounting slot block. One side wall of the moving block is connected to the inner cavity wall of the mounting slot block via a tightening spring, and a connecting rod is fixedly connected to the other side wall of the moving block, and the other end of the connecting rod passes through the side wall of the mounting slot block and is connected to the limit block. A driving rod is fixedly connected between the two symmetrical moving blocks, and the driving rod is sleeved on the arc-shaped hole of the driving block. When the driving rod moves, it can simultaneously drive the symmetrical moving blocks at both ends to move.

4. The clamping assembly according to claim 1, characterized in that: A side wall of the clamping plate assembly is fixedly connected to one end of the push-pull rod away from the second baffle plate. A through hole is provided on the first baffle plate, a bearing is installed in the through hole, a gear ring is installed on the inner ring of the bearing, the gear ring can rotate freely, and the other end of the push-pull rod passes through the hole of the gear ring. The inner wall of the gear ring has a first driving key, and the push-pull rod has a first sliding groove that cooperates with the first driving key. The gear ring is meshed with a gear installed at one end of the limit rod.

5. The clamping assembly according to claim 1, characterized in that: The release spring connects the first baffle plate with the clamping plate assembly, and the release spring is sleeved on the push-pull rod. There is also a locking assembly between the clamping plate assembly and the second baffle plate. The locking assembly includes a locking plate. The bottom of the locking plate is installed in the strip slide groove, and the locking assembly can freely slide on the strip slide groove. A guide rod is also installed at the bottom of the fixed seat. The second slider at the bottom of the clamping plate assembly and the third slider at the bottom of the locking assembly are both sleeved on the guide rod, and an L-shaped slider is connected to the bottom of the second slider. The third slider is located in the L-shaped slider. One end of the tensioning spring is connected to the third slider, and the other end passes through the hole on the L-shaped slider and is connected to the second baffle plate.

6. The clamping assembly according to claim 1, characterized in that: An anti-accidental touch mechanism is installed at the other end of the limit shaft, and the anti-accidental touch structure includes a mounting frame fixedly connected to the bracket, a torsion spring fixedly connected to the inner ring side wall of the mounting frame, the limit shaft is installed in the inner ring of the torsion spring, and two blocks are provided on the end face of the mounting frame. A back plate is provided on the outer wall of one end of the limit shaft close to the mounting frame, and the back plate is arranged between the two blocks. One end of the torsion spring is fixedly connected to the side wall of the back plate, and the rotation range of the limit shaft is limited by the two blocks.

7. The clamping assembly according to claim 1, characterized in that: It also includes a buffer assembly, which includes a piston mechanism that passes through and is fixedly connected to the side wall of the first baffle, the piston mechanism has a built-in piston, the piston in the piston mechanism is connected to a piston rod, one end of the piston rod is fixedly connected to the side wall of the splint body, one end of the piston chamber of the piston mechanism is fixedly connected to a telescopic tube, the other end of the telescopic tube is fixedly connected to a buffer chamber, the buffer chamber is fixedly connected to the side wall of the splint body, and an air outlet is opened on the outer wall of the buffer chamber.

8. A method for machining a quick-release clamping assembly using a machine tool according to any one of claims 1 to 7, characterized in that: include: Step 1. The locking plate is in a pulled-out state under the action of the L-shaped pull plate, and the workpiece is placed between the locking plate of the fixed seat and the second baffle; Step 2. Rotate the push-pull rod to drive the gear ring to rotate through the cooperation of the first slide groove and the first drive key. Under the meshing action of the gear ring and the gear, the limit shaft rotates a certain angle. The second slide groove and the second drive key interact with each other. The drive block rotates synchronously with the limit shaft. The arc hole acts on the drive rod. The moving block drives the connecting rod and the limit block to move and compress the spring, so that the limit block is disconnected from the limit shaft and the limit is released. Step 3. Push the push-pull rod forward to drive the clamping plate body close to the workpiece. The locking assembly quickly retracts under the action of the tension spring to pre-clamp the workpiece. Continue to push the push-pull rod until the clamping plate assembly clamps the workpiece. During this process, the piston rod of the buffer assembly is pulled out and the piston chamber inhales gas. Step 4. Reverse the push-pull rod to limit the clamp body, thereby fixing the workpiece; Step 5. After the workpiece is processed, turn the push-pull rod to release the limit. The clamping plate assembly is pulled back under the action of the release spring to quickly release the workpiece. At the same time, the piston rod acts in the opposite direction on the piston chamber of the buffer assembly to slow down the force of the release spring. The gas in the piston chamber is blown out from the air port to clean the cut workpiece debris on the workbench.

9. The method for using a quick-release clamping assembly for machining a machine tool according to claim 8, characterized in that: It also includes that when the push-pull rod is rotated, the back plate moves between the two blocks of the anti-accidental touch mechanism to limit the rotation range of the push-pull rod. After rotating back, the back plate acts on the torsion spring of the anti-accidental touch mechanism, so that the push-pull rod will not rotate easily.

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