A broken tap extraction tool

Abstract

The present application relates to the technical field of machining auxiliary tool, and especially relates to a broken tap taking-out tool, which comprises a fixing disc, the outer edge of the bottom of the fixing disc is slidably connected with three taking-out claws, the inner side of the fixing disc is rotatably connected with an adjusting disc, three arc-shaped transmission grooves are respectively formed in the outer edge of the adjusting disc, the inner wall of each arc-shaped transmission groove is slidably connected with the top of a corresponding taking-out claw, and the adjusting disc is used for adjusting the three taking-out claws to take out broken taps of different sizes; through the linkage of the adjusting disc, the arc-shaped transmission grooves and the taking-out claws, and the guidance and limiting of the guide grooves and the guide rods, the synchronous telescopic adjustment of the three taking-out claws is realized, the broken taps of different diameters and different types can be adapted, the whole taking-out tool does not need to be replaced, the problem of single size adaptation of the fixed installation of the taking-out claws is solved, the operation is simplified, and the tool storage cost is reduced.

Description

Technical Field

[0001] This invention relates to the field of auxiliary tools for machining, and in particular to a tool for removing broken taps. Background Technology

[0002] In the field of machining, tapping is one of the core processes for machining internal threads. As a key tool for tapping, the tap is prone to breakage due to uneven stress, material fatigue, improper operation, etc., and may break off and become embedded in the threaded hole of the workpiece. If the broken tap cannot be removed in time and safely, it will not only lead to the scrapping of the workpiece, but also affect the machining progress, increase production costs, and cause unnecessary losses.

[0003] There are many types of tools available for removing broken taps. The most commonly used tool is a remover with a claw. Its working principle is to engage the claw with the chip groove or outer wall of the broken tap, and then remove the broken tap by rotating or prying, which makes it easier to remove the broken tap.

[0004] When using the above technology, the following technical problems were found in the existing technology: On the one hand, the extraction claw in the existing technology generally adopts a fixed installation method, that is, the extraction claw and the tooling body are integrally formed or fixedly connected structure, and their spacing and size are fixed values. It can only be used for broken taps of a single size. When encountering broken taps of different diameters and different models, the entire extraction tooling needs to be replaced, which is cumbersome, has poor versatility, and increases the cost of tool reserves. On the other hand, existing removal tools can only be used for loose or easily removed broken taps. When broken taps are difficult to remove directly due to corrosion, jamming, or excessively deep fracture surfaces, there is a lack of effective treatment methods. Therefore, it is necessary to break the broken taps by drilling in order to loosen them and remove them smoothly. To this end, we have designed a broken tap removal tool to provide another technical solution to the above-mentioned technical problems. Summary of the Invention

[0005] The purpose of this invention is to provide a tooling for removing broken taps, so as to solve the problems mentioned in the background art.

[0006] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: A broken tap removal tool includes a fixed plate, three removal claws are slidably connected to the outer edge of the bottom of the fixed plate, and an adjusting plate is rotatably connected to the inner side of the fixed plate. The outer edge of the inner side of the adjusting plate has three arc-shaped transmission grooves, and the inner wall of each arc-shaped transmission groove is slidably connected to the top of the corresponding removal claw. The adjusting plate is used to adjust the three removal claws to remove broken taps of different sizes.

[0007] The bottom edge of the fixed plate has three guide grooves, and the inner walls of the guide grooves are slidably connected to the corresponding extraction claws.

[0008] The inner wall of the guide groove is fixed with a guide rod, and the outer wall of the guide rod is slidably connected to the corresponding extraction claw.

[0009] The outer edge of the adjustment disc is fixed with a toggle block.

[0010] The toggle block has a central rotatable connection with a limiting pin, and the bottom of the outer side of the fixed plate has several limiting grooves. The bottom end of the limiting pin is slidably connected to the inner wall of the corresponding limiting groove.

[0011] The device also includes an electric drill. A bushing is installed in the middle of the fixed disc. A transmission rod rotates and slides up and down on the inner wall of the bushing. A transmission gear is fixed at the top of the transmission rod. A crushing drill bit is installed at the bottom of the transmission rod. The output end of the electric drill is connected to the transmission gear.

[0012] The fixed plate has a rotating sleeve fixed in the middle of its top. The inner wall of the rotating sleeve is rotatably connected to a linkage plate. The inside of the linkage plate is slidably connected to the transmission rod. The outer side of the rotating sleeve is provided with a linkage component for inserting the linkage plate. The linkage component is used to drive the transmission rod, rotating sleeve, fixed plate and extraction claw to rotate synchronously to extract the broken tap.

[0013] The transmission rod has symmetrical transmission grooves at both ends of its outer wall, and the inner wall of the transmission groove is slidably connected to the linkage disc.

[0014] The linkage component includes a limiting rod, and the outer edge of the linkage disk is provided with several linkage slots. The two ends of the outer side of the rotating sleeve are respectively slidably connected to the limiting rods, and the two limiting rods near the center pass through the rotating sleeve and are inserted into the corresponding linkage slots.

[0015] The rotating sleeve has guide blocks fixed at both ends on its outer side. The guide blocks are slidably connected to the limiting rod inside. A slider is fixed on the outer wall of the limiting rod and inside the guide block. The slider slides back and forth along the inner side of the guide block. A resistance spring is fixed on the inner side of the slider. One end of the resistance spring is fixed to the limiting rod.

[0016] It is clear without a doubt that the technical solution described above in this application can solve the technical problem that this application aims to address.

[0017] Compared with the prior art, the beneficial effects of the present invention are: the present invention achieves synchronous extension and retraction adjustment of the three extraction claws by means of the linkage between the adjustment plate, the arc-shaped transmission groove and the extraction claw, combined with the guiding limit of the guide groove and the guide rod, which can adapt to different diameters and different models of broken taps without replacing the entire extraction tooling. It solves the problem of fixed installation and single size adaptation of the existing extraction claws, simplifies the operation and reduces tooling storage costs. Seamless switching between crushing and extraction actions is achieved through linkage components (limit rod, linkage slot, guide block, slider, and resistance spring). The same electric drill can be used as a power source to drive the crushing drill bit for crushing and to drive the extraction claw to rotate synchronously for extraction. No additional power equipment is required, which simplifies the operation process and reduces the complexity of operation. The bushing provides support for the rotation and sliding of the transmission rod, ensuring smooth movement of the transmission rod during crushing. The cooperation between the transmission slide and the linkage disc ensures that the transmission rod can drive the linkage disc to rotate synchronously when rotating, and also allows the transmission rod to slide up and down to complete the crushing pressure. The elastic reset function of the resistance spring in the linkage assembly can realize the automatic insertion and locking of the limit rod and the linkage slot, ensuring reliable power transmission and avoiding linkage failure. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the following description of the embodiments will be briefly introduced. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a top view structural diagram of the entire invention; Figure 3 This is a side view structural diagram of the entire invention; Figure 4 This is a schematic diagram of the structure between the fixed disc and the transmission rod of the present invention; Figure 5 This is a schematic diagram of the structure between the fixing plate and the extraction claw of the present invention; Figure 6 This is a schematic diagram of the structure between the adjusting plate and the fixed plate of the present invention; Figure 7 This is a schematic diagram of the structure between the bushing and the transmission rod of the present invention; Figure 8 This is a schematic diagram of the structure between the arc-shaped transmission groove and the extraction claw of the present invention; Figure 9 This is a schematic diagram of the structure between the slider and the limiting rod of the present invention; Figure 10 This is a schematic diagram of the structure between the bushing and the transmission rod of the present invention.

[0020] In the diagram: 1. Fixed disc; 2. Rotating sleeve; 3. Transmission rod; 4. Transmission gear; 5. Extraction claw; 6. Actuating block; 7. Limiting pin; 8. Electric drill; 9. Adjusting disc; 10. Crushing drill bit; 11. Limiting groove; 12. Guide groove; 13. Arc-shaped transmission groove; 14. Guide rod; 15. Transmission slide; 16. Linkage disc; 17. Linkage slot; 18. Bushing; 19. Limiting rod; 20. Guide block; 21. Slider; Detailed Implementation

[0021] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0022] Example 1 Please see Figure 1-8 The present invention provides a technical solution: a broken tap removal tool, including a fixed plate 1, three removal claws 5 are slidably connected to the outer edge of the bottom of the fixed plate 1, and an adjusting plate 9 is rotatably connected to the inner side of the fixed plate 1. Three arc-shaped transmission grooves 13 are respectively opened on the outer edge of the inner side of the adjusting plate 9, and the inner wall of the arc-shaped transmission grooves 13 is slidably connected to the top of the corresponding removal claws 5. The adjusting plate 9 is used to adjust the three removal claws 5 to remove broken taps of different sizes. By rotating the adjusting disk 9 located inside the fixed disk 1, the three arc-shaped transmission grooves 13 on its outer edge serve as the driving path, and are slidably connected to the tops of the three extraction claws 5 respectively. When the adjusting disk 9 rotates, the inner wall of the arc-shaped transmission groove 13 applies a lateral force to the top of the extraction claw 5, guiding the extraction claw 5 to slide along the outer edge of the bottom of the fixed disk 1, thereby changing the relative distance between the three extraction claws 5 to accommodate broken taps of different diameters; Three guide grooves 12 are respectively opened on the outer edge of the bottom end of the fixed plate 1. The inner wall of the guide groove 12 is slidably connected to the corresponding extraction claw 5. The inner wall of the guide groove 12 is fixed with a guide rod 14, and the outer wall of the guide rod 14 is slidably connected to the corresponding extraction claw 5. The three guide grooves 12 on the outer edge of the bottom of the fixed plate 1 provide the main track constraint for the sliding of the extraction claw 5. At the same time, the guide rod 14 fixed to the inner wall of the guide groove 12 passes through the extraction claw 5 and is slidably connected to it, providing secondary guidance and limiting for the sliding direction of the extraction claw 5, effectively preventing the extraction claw 5 from deviating, jamming or shaking during the sliding process, and ensuring adjustment accuracy and structural stability.

[0023] Specifically, by rotating the adjusting disc 9, the arc-shaped transmission groove 13 rotates accordingly, driving the extraction claws 5 to "contract" to reduce the clamping diameter or "expand" to increase the clamping diameter along the guiding direction of the guide groove 12 and the guide rod 14. Through this mechanical linkage, the three extraction claws 5 can be synchronously and precisely adjusted to a position that matches the size of the broken tap to be extracted, thereby achieving effective clamping.

[0024] An actuating block 6 is fixed on the outer edge of the adjusting disk 9. A limiting pin 7 is rotatably connected in the middle of the actuating block 6. Several limiting grooves 11 are opened on the bottom of the outer side of the fixed disk 1. The bottom end of the limiting pin 7 is slidably connected to the inner wall of the corresponding limiting groove 11. The actuating block 6 fixed on the outer edge of the adjusting plate 9 is the point of force applied by the operator to rotate the adjusting plate 9. The limiting pin 7 connected to the actuating block 6 can be rotated so that its bottom end can be inserted into different limiting slots 11 opened on the bottom of the outer side of the fixed plate 1. By selecting different limiting slots 11, the rotation angle of the adjusting plate 9 can be initially determined, that is, the clamping size of the take-out claw 5 can be determined, so as to achieve rapid coarse positioning. After adjusting the position of the extraction claw 5 according to the size of the broken tap, the operator rotates the limiting pin 7 inside the actuating block 6, causing its bottom end to tightly engage with the pre-aligned limiting groove 11. This engagement forms a mechanical lock, restricting the reverse rotation freedom of the adjusting disc 9. Because the adjusting disc 9 is locked, its constraint on the extraction claw 5 through the arc-shaped transmission groove 13 is also fixed, thereby ensuring the accuracy of the distance between the extraction claws 5 and preventing the extraction claws 5 from loosening or shifting in size during subsequent tap removal operations by rotating the rotating sleeve 2 and the fixed disc 1.

[0025] Example 2 Reference Figures 8-10 A tool for removing broken taps also includes an electric drill 8. A bushing 18 is installed in the middle of the fixed plate 1. A transmission rod 3 rotates and slides up and down on the inner wall of the bushing 18. A transmission gear 4 is fixed at the top of the transmission rod 3. A crushing drill bit 10 is installed at the bottom of the transmission rod 3. The output end of the electric drill 8 is connected to the transmission gear 4. When the broken tap is difficult to remove, it is necessary to break it to loosen and loosen it for cleaning, thereby improving the efficiency of removing the broken tap. Therefore, the electric drill 8 is started to drive the transmission gear 4 and the transmission rod 3 to rotate at high speed, so that the transmission rod 3 drives the breaking drill bit 10 to apply pressure to break the broken tap. At this time, the transmission rod 3 applies pressure downward along the guide of the linkage disc 16 and the breaking drill bit 10, thereby breaking the broken tap. The breaking process will destroy the stuck broken tap and loosen it, creating conditions for the subsequent gripping of the removal claw 5.

[0026] A rotating sleeve 2 is fixed in the middle of the top of the fixed plate 1. A linkage plate 16 is rotatably connected to the inner wall of the rotating sleeve 2. The interior of the linkage plate 16 is slidably connected to the transmission rod 3. A linkage component for inserting the linkage plate 16 is provided on the outer side of the rotating sleeve 2. The linkage component is used for the electric drill 8 to drive the transmission rod 3, the rotating sleeve 2, the fixed plate 1 and the extraction claw 5 to rotate synchronously to extract the broken tap. The two ends of the outer wall of the transmission rod 3 are symmetrically provided with transmission grooves 15. The inner wall of the transmission grooves 15 is slidably connected to the linkage plate 16. When the electric drill 8 drives the transmission rod 3 to rotate, the transmission rod 3 and the transmission slide 15 drive the linkage disc 16 to rotate synchronously inside the rotating sleeve 2 (the transmission rod 3 drives the linkage disc 16 to rotate synchronously according to the guidance of the transmission slide 15, and the transmission rod 3 can be adjusted up and down along the vertical guide of the linkage disc 16). When the breaking drill bit 10 effectively breaks and loosens the broken tap, the linkage disc 16 is inserted through the linkage assembly so that the transmission rod 3 drives the rotating sleeve 2, the fixed disc 1, the linkage assembly and the three extraction claws 5 to rotate synchronously, so that the electric drill 8 can effectively remove the broken tap.

[0027] The linkage assembly includes a limiting rod 19. Several linkage slots 17 are opened on the outer edge of the linkage disk 16. The two ends of the outer side of the rotating sleeve 2 are slidably connected to the limiting rod 19. The two limiting rods 19 pass through the rotating sleeve 2 near the center and are inserted into the corresponding linkage slots 17. The two ends of the outer side of the rotating sleeve 2 are respectively fixed with guide blocks 20. The inside of the guide block 20 is slidably connected with the limiting rod 19. A slider 21 is fixed on the outer wall of the limiting rod 19 and located inside the guide block 20. The slider 21 slides back and forth along the inside of the guide block 20. A resistance spring is fixed on the inside of the slider 21. One end of the resistance spring is fixed to the limiting rod 19. The elasticity of the resistance spring drives the slider 21 and the limiting rod 19 to pass through the rotating sleeve 2 and engage with the corresponding linkage slot 17, thereby the electric drill 8 effectively drives the rotating sleeve 2, the fixed plate 1 and the three extraction claws 5 to remove the broken tap. When the broken tap needs to be crushed, the linkage disc 16 slides up and down along the inner wall of the rotating sleeve 2, thereby misaligning the linkage disc 16 with the limit rod 19 to ensure that the limit rod 19 and the linkage disc 16 are disengaged. The electric drill 8 drives the transmission rod 3 and the crushing drill bit 10 to crush the broken tap, causing the transmission rod 3 to drive the linkage disc 16 to rotate freely inside the rotating sleeve 2. When the crushing is finished, the limit rod 19 and the linkage disc 16 are inserted, and then the transmission rod 3 drives the rotating sleeve 2, the fixed disc 1 and the three extraction claws 5 to remove the crushed broken tap.

[0028] The process of using the broken tap removal tool provided by this invention is as follows: The operator moves the toggle block 6 fixed on the outer edge of the adjustment plate 9 to rotate the adjustment plate 9 inside the fixed plate 1. The three arc-shaped transmission grooves 13 on the outer edge of the adjustment plate 9 serve as the driving path and are slidably connected to the top of the three extraction claws 5. When rotating, the inner wall of the arc-shaped transmission groove 13 applies a lateral force to the top of the extraction claws 5, guiding the extraction claws 5 to slide along the guide groove 12 on the outer edge of the bottom of the fixed plate 1. At the same time, the guide rod 14 on the inner wall of the guide groove 12 passes through the extraction claws 5 and is slidably connected to them, providing secondary guidance and limiting for the extraction claws 5, so that the three extraction claws 5 can contract or expand synchronously, and the clamping diameter can be adjusted to accommodate different sizes of broken taps. After the extraction claw 5 is adjusted to match the size of the broken tap, the limiting pin 7 inside the rotating block 6 is rotated so that its bottom end is inserted into the corresponding limiting groove 11 on the bottom of the outer side of the fixed plate 1, forming a mechanical lock and restricting the reverse rotation of the adjusting plate 9, thereby fixing the relative position of the extraction claw 5 and preventing loosening or size deviation during subsequent tap removal operations. After locking, the extraction claw 5 is rotated synchronously by rotating the fixed plate 1, and the loose broken tap is removed from the workpiece by using the clamping force of the extraction claw 5 on the broken tap.

[0029] When the broken tap is difficult to remove directly, the adjustment process of Example 1 is first used to make the removal claw 5 initially fit against the outer periphery of the broken tap without clamping it; then, the elastic force of the resistance spring in the linkage assembly is overcome, and the limit rod 19 is pulled outward by the slider 21, so that the limit rod 19 is disengaged from the linkage slot 17 on the outer edge of the linkage plate 16, and the linkage plate 16 is released from the lock between the rotating sleeve 2. At this time, the linkage plate 16 can rotate freely on the inner wall of the rotating sleeve 2. Connect the output end of the electric drill 8 to the transmission gear 4 at the top of the transmission rod 3, start the electric drill 8, and drive the transmission gear 4 and transmission rod 3 to rotate at high speed. The transmission rod 3 can rotate and slide up and down in the bushing 18 in the middle of the fixed plate 1. The operator applies downward pressure to the transmission rod 3, causing the transmission rod 3 to move downward along the vertical guide of the linkage plate 16, driving the crushing drill bit 10 assembled at the bottom to drill and crush the broken wire tap at high speed, breaking the stuck broken wire tap and loosening it. During this process, the transmission rod 3 drives the linkage disk 16 to rotate freely inside the rotating sleeve 2 through the transmission groove 15 on the outer wall, without driving the rotating sleeve 2 and the fixed disk 1 to rotate, thus avoiding damage to the workpiece when it breaks. After the crushing is completed, stop applying pressure to the transmission rod 3 and lift it slightly to reset the position of the linkage plate 16; the elasticity of the resistance spring drives the slider 21 and the limit rod 19 to reset, and the limit rod 19 passes through the rotating sleeve 2 and inserts into the linkage slot 17 of the linkage plate 16 to relock the linkage plate 16 and the rotating sleeve 2. Then the electric drill 8 continues to drive the transmission rod 3 to rotate. At this time, the transmission rod 3 drives the linkage plate 16 to rotate through the transmission slide 15. Since the linkage plate 16 is locked with the rotating sleeve 2, the power is transmitted to the rotating sleeve 2, the fixed plate 1 and the three extraction claws 5 in sequence, so that the extraction claws 5 drive the broken wire tap to rotate synchronously, and finally remove it from the workpiece.

[0030] Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

Claims

1. A tooling for removing broken taps, comprising a fixed plate (1), characterized in that, The bottom outer edge of the fixed disk (1) is slidably connected to three extraction claws (5), and the inner side of the fixed disk (1) is rotatably connected to an adjustment disk (9). The outer edge of the inner side of the adjustment disk (9) is respectively opened with three arc-shaped transmission grooves (13). The inner wall of the arc-shaped transmission grooves (13) is slidably connected to the top of the corresponding extraction claws (5). The adjustment disk (9) is used to adjust the three extraction claws (5) to extract broken taps of different sizes.

2. The tooling for removing broken taps according to claim 1, characterized in that, The bottom edge of the fixed plate (1) is provided with three guide grooves (12), and the inner wall of the guide grooves (12) is slidably connected to the corresponding extraction claws (5).

3. The tooling for removing a broken tap according to claim 2, characterized in that, The inner wall of the guide groove (12) is fixed with a guide rod (14), and the outer wall of the guide rod (14) is slidably connected to the corresponding extraction claw (5).

4. The tooling for removing a broken tap according to claim 2, characterized in that, An actuating block (6) is fixed to the outer edge of the adjusting disc (9).

5. The tooling for removing a broken tap according to claim 4, characterized in that, The center of the actuating block (6) is connected to a limiting pin (7), and the bottom of the outer side of the fixed plate (1) is provided with several limiting grooves (11). The bottom end of the limiting pin (7) is slidably connected to the inner wall of the corresponding limiting groove (11).

6. The tooling for removing a broken tap according to claim 2, characterized in that, It also includes an electric drill (8), in which a bushing (18) is installed in the middle of the fixed plate (1), and a transmission rod (3) is rotated and slid up and down on the inner wall of the bushing (18). A transmission gear (4) is fixed at the top of the transmission rod (3), and a crushing drill bit (10) is installed at the bottom of the transmission rod (3). The output end of the electric drill (8) is connected to the transmission gear (4).

7. The tooling for removing a broken tap according to claim 6, characterized in that, A rotating sleeve (2) is fixed in the middle of the top of the fixed plate (1). A linkage plate (16) is rotatably connected to the inner wall of the rotating sleeve (2). The interior of the linkage plate (16) is slidably connected to the transmission rod (3). A linkage component for inserting the linkage plate (16) is provided on the outer side of the rotating sleeve (2). The linkage component is used for the electric drill (8) to drive the transmission rod (3), the rotating sleeve (2), the fixed plate (1), and the extraction claw (5) to rotate synchronously to extract the broken tap.

8. The tooling for removing a broken tap according to claim 6, characterized in that, The transmission rod (3) has symmetrical transmission grooves (15) at both ends of its outer wall, and the inner wall of the transmission groove (15) is slidably connected to the linkage disc (16).

9. A tooling for removing broken taps according to claim 7, characterized in that, The linkage component includes a limiting rod (19), and the outer edge of the linkage disk (16) is provided with several linkage slots (17). The two ends of the outer side of the rotating sleeve (2) are respectively connected to the limiting rod (19). The two limiting rods (19) pass through the rotating sleeve (2) and are inserted into the corresponding linkage slots (17) at the center end.

10. A tooling for removing broken taps according to claim 9, characterized in that, Guide blocks (20) are fixed at both ends of the outer side of the rotating sleeve (2). The inside of the guide block (20) is slidably connected to the limiting rod (19). A slider (21) is fixed on the outer wall of the limiting rod (19) and located inside the guide block (20). The slider (21) slides back and forth along the inside of the guide block (20). A resistance spring is fixed on the inside of the slider (21). One end of the resistance spring is fixed to the limiting rod (19).

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