Bearing washer and cutter easy to disassemble and assemble

Abstract

The utility model relates to the technical field of blade assembly parts, in particular to a bearing washer and a cutter easy to disassemble and assemble, the bearing washer comprises a washer body, a connecting ring and an inverted buckle which are all arranged in a hollow mode and connected in sequence, and the cross section area of the washer body is larger than that of the connecting ring. The cross sectional area of the end, close to the connecting ring, of the inverted buckle is larger than that of the connecting ring. The utility model aims to solve the problem that an existing gasket is easy to damage or lose when a blade is replaced and a cutter is detached, and provides a bearing gasket which can be stably retained on the cutter when the blade is replaced on the premise of lacking an intermediate shaft, so that the blade is convenient to replace, and the gasket can be effectively prevented from being damaged or lost.

Description

Technical Field

[0001] This utility model relates to the field of blade assembly technology, and more specifically, to a bearing washer and an easy-to-disassemble cutting tool. Background Technology

[0002] Bearing washers are critical components in bearing assemblies, primarily used to reduce friction, support loads, adjust clearances, or prevent wear. The most common type is the flat washer, the simplest form, mainly used to distribute pressure. Spring washers are also available, providing elastic support and preventing loosening. Similarly, thrust washers are used to withstand axial loads and are commonly found in thrust bearings. Self-lubricating washers, containing lubricating material, reduce maintenance requirements. These washers can all be fitted into removable cutting tools. When changing the cutting tool, the tool must first be disassembled. However, without an intermediate shaft for tool disassembly, the washers lack support and must be removed separately, making them prone to damage or loss. Utility Model Content

[0003] The purpose of this invention is to overcome the problem that existing washers are easily damaged or lost when the cutting tool is disassembled for blade replacement. It provides a bearing washer that can be securely retained on the cutting tool even when the intermediate shaft is missing during blade replacement, which facilitates blade replacement and effectively prevents damage or loss of the washer.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0005] A bearing washer includes a washer body, a connecting ring, and a buckle, all hollow and connected in sequence. The cross-sectional area of ​​the washer body is larger than the cross-sectional area of ​​the connecting ring, and the cross-sectional area of ​​the buckle near the end of the connecting ring is larger than the cross-sectional area of ​​the connecting ring.

[0006] This invention relates to a bearing washer that achieves the functions of reducing friction, supporting load, adjusting clearance, and preventing wear of ordinary bearing washers through the washer body. Based on existing flat washers, a connecting ring and a buckle are added. The connecting ring enables the buckle to be installed with the washer body, and the buckle further secures the washer body to the cutting tool. This solves the problem of the bearing washer falling off after the intermediate shaft is removed, and also improves the convenience and efficiency of cutting tool replacement. Compared with traditional bearing washers, this invention allows the bearing washer to be securely fixed in the installation position even without an intermediate shaft.

[0007] Furthermore, the connecting ring is provided with a plurality of clearance grooves along its circumference, and the clearance grooves penetrate the undercut. The clearance grooves allow the undercut to deform during installation, making the bearing washer easier to install without damaging the washer body.

[0008] Furthermore, the clearance groove extends to the end of the connecting ring near the washer body. This design enhances the clearance function of the clearance groove, increases the deformation capacity of the undercut, and improves the ease of bearing washer installation.

[0009] Furthermore, it also includes a plurality of balls, which are movably mounted on the washer body and protrude from both ends of the washer body. The arrangement of the balls transforms the sliding friction between the washer body and the outside environment into rolling friction, and also reduces the contact area, further reducing friction and preventing wear between the bearing washer and adjacent components.

[0010] Furthermore, the ball bearing is made of steel or ceramic material; and / or the washer body is made of plastic. Steel or ceramic ball bearings can increase their hardness and extend their service life; while plastic washer bodies, while fulfilling the basic functions of a bearing washer, can reduce material costs; preferably, PA, POM, PC, and other plastics can be used.

[0011] This utility model also provides an easy-to-disassemble knife, including a knife body, a handle assembly, and an adjusting head pin assembly; the handle assembly includes a first handle trim piece, a first cover piece, a second cover piece, and a second handle trim piece that are detachably connected in sequence, and also includes two bearing washers as described above. The two bearing washers are a first bearing washer and a second bearing washer. The first bearing washer passes through the first cover piece and is detachably connected to it, and the second bearing washer passes through the second cover piece and is detachably connected to it. The knife body is located between the first cover piece and the second cover piece. The adjusting head pin assembly is arranged to pass through the first handle trim piece, the first bearing washer, the knife body, and the second bearing washer in sequence.

[0012] The easy-to-disassemble knife of this utility model mainly consists of three parts: the adjusting head pin assembly for mounting the knife body on the fixed base handle assembly; the knife body is a consumable part, and after the knife body breaks or wears, the knife can be disassembled and the knife body replaced and reinstalled for use; during disassembly, only the adjusting head pin assembly needs to be removed, maintaining the integrity of the handle assembly; and because a bearing washer with an inverted buckle structure is used, it can be installed and fixed between the handle trim piece and the mask piece, so that even after the adjusting head pin assembly used as the central shaft is removed, it can still be firmly fixed in the installation position.

[0013] Furthermore, it also includes a first fixing plate and a second fixing plate. The first fixing plate is located between the first handle trim piece and the first mask and is embedded in the first handle trim piece. The second fixing plate is located between the second handle trim piece and the second mask and is embedded in the second handle trim piece. The undercut end of the first bearing washer is inserted into the first fixing plate, and the undercut end of the second bearing washer is inserted into the second fixing plate. The first fixing plate is used to fix the bearing washer, so that the bearing washer does not depend on the intermediate shaft. The first fixing plate is installed and fixed by the first handle trim piece and the first mask piece, so that when the tool body is changed, after the adjusting head pin assembly is disassembled, the bearing washer can always be fixed in the handle assembly, which can effectively prevent the washer from being damaged or lost.

[0014] Furthermore, the adjusting head pin assembly includes a head pin and an adjusting knob. The head pin passes through the adjusting knob and is threadedly connected to it. The head pin also sequentially passes through the first handle trim piece, the first fixing piece, the first bearing washer, the blade body, the second bearing washer, and the second fixing piece. The adjusting knob is located outside the first handle trim piece. The adjusting head pin assembly serves two purposes: firstly, it acts as a pivot, allowing the blade body to rotate and fold relative to the handle assembly; secondly, it adjusts the tightness between the blade body and the handle assembly. Specifically, the adjusting knob locks the head pin, preventing counter-clockwise rotation relative to the handle assembly during use, ensuring the reliability of the blade body during installation and use. Furthermore, the adjusting knob adjusts the smoothness of the blade body's rotation, ensuring smooth rotation and preventing head wobble, while also reducing the machining precision required for the head pin. A slight interference fit between the head pin and the handle assembly prevents the head pin from slipping out.

[0015] Furthermore, the end of the stud protrudes outward with a locking portion, and the second fixing plate has a through hole. A locking position is provided along the edge of the through hole. When the stud passes through the through hole and is rotated until the locking portion aligns with the locking position, the stud cannot be pulled out of the second fixing plate. When the locking portion is located in the through hole, the stud can be pulled out of the second fixing plate. Here, a clearance fit can be made between the stud and the handle assembly. The engagement of the locking portion with the through hole allows for free removal of the stud, but when the stud is rotated to align the locking portion with the locking position, the stud cannot be pulled out of the handle assembly, ensuring the reliability of the blade assembly.

[0016] Furthermore, it also includes a limiting spring, which is installed inside the first mask or the second mask and can abut against the end of the blade body. The limiting spring is used to limit the blade body. When the blade is in use and is rotated out of the handle assembly to form an unfolded state with the handle assembly, the limiting spring prevents the blade body from rotating and folding into the handle assembly during use.

[0017] The beneficial effects of this utility model are as follows:

[0018] 1. Easy disassembly: The blade body can be disassembled by pulling out the adjusting head pin assembly, making it easy to replace the blade body;

[0019] 2. The head pin, in conjunction with the adjustment knob, ensures that the knife body does not wobble during use, thus guaranteeing the knife's usability;

[0020] 3. After the blade body is disassembled, the bearing washer can be fixed at the handle assembly, providing convenience for blade body disassembly and replacement;

[0021] 4. The head pin has a locking part that cooperates with the second fixing piece to ensure that the tool will not be loose during use and to ensure the safety of the tool. Attached Figure Description

[0022] Figure 1 This is a structural diagram of a bearing washer in the first direction according to the present invention.

[0023] Figure 2 This is a structural diagram of a bearing washer in the second direction according to this utility model.

[0024] Figure 3 This is a structural diagram of a cutting tool that is easy to assemble and disassemble according to the present invention, in the first direction.

[0025] Figure 4 This is a structural diagram of a cutting tool that is easy to assemble and disassemble in the second direction according to this utility model.

[0026] Figure 5 This is a third-dimensional structural diagram of a cutting tool that is easy to assemble and disassemble according to this utility model.

[0027] Figure 6 This is a partially exploded structural diagram of the present invention.

[0028] Figure 7 This is a detailed exploded structural diagram of the present invention.

[0029] Figure 8 yes Figure 3 AA sectional view.

[0030] Figure 9 This is a structural diagram of the adjusting head nail assembly of this utility model.

[0031] Figure 10 This is a structural diagram of the second fixing piece of this utility model.

[0032] Figure 11 This is a structural diagram of another embodiment of a knife that is easy to assemble and disassemble according to this utility model.

[0033] Figure 12 yes Figure 11 A partial disassembly diagram.

[0034] The markings in the diagram are explained as follows:

[0035] 1. Washer body; 2. Connecting ring; 3. Overlock; 4. Clearance groove; 5. Ball bearing; 11. Blade body; 12. Handle assembly; 121. First handle trim piece; 122. First cover piece; 123. Second cover piece; 124. Second handle trim piece; 125. Rivet; 126. First fixing piece; 127. Second fixing piece; 1271. Through hole; 1272. Snap-fit ​​position; 128. Limiting spring; 129. Clamping part; 13. Adjusting head pin assembly; 131. Head pin; 1311. Snap-fit ​​part; 132. Adjusting knob; 14. First bearing washer; 15. Second bearing washer. Detailed Implementation

[0036] The accompanying drawings are for illustrative purposes only and should not be construed as limiting this patent. To better illustrate this embodiment, some components in the drawings may be omitted, enlarged, or reduced, and do not represent the actual dimensions of the product. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings. The positional relationships described in the drawings are for illustrative purposes only and should not be construed as limiting this patent.

[0037] In the accompanying drawings of this utility model, the same or similar reference numerals correspond to the same or similar components. In the description of this utility model, it should be understood that if terms such as "upper," "lower," "left," "right," "long," and "short" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, they are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the drawings are only for illustrative purposes and should not be construed as limiting this patent. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0038] The technical solution of this utility model will be further described in detail below through specific embodiments and with reference to the accompanying drawings:

[0039] Example 1

[0040] like Figure 1 and Figure 2 The present invention provides an embodiment of a bearing washer, comprising a washer body 1, a connecting ring 2, and a buckle 3, all hollow and connected in sequence. The cross-sectional area of ​​the washer body 1 is larger than that of the connecting ring 2, and the cross-sectional area of ​​the buckle 3 near the end of the connecting ring 2 is larger than that of the connecting ring 2.

[0041] This invention relates to a bearing washer that, through its washer body 1, achieves the functions of reducing friction, supporting load, adjusting clearance, or preventing wear found in ordinary bearing washers. Based on existing flat washers, a connecting ring 2 and a snap fastener 3 are added. The connecting ring 2 enables the snap fastener 3 to be installed with the washer body 1, and the snap fastener 3 further secures the washer body 1 to the cutting tool. This solves the problem of the bearing washer falling off after the intermediate shaft is removed, and also improves the convenience and efficiency of cutting tool replacement. Compared to traditional bearing washers, this invention allows the bearing washer to be securely fixed in its installation position even without an intermediate shaft.

[0042] As an improvement to this embodiment, the connecting ring 2 is provided with a plurality of clearance grooves 4 in sequence along the circumference, and the clearance grooves 4 pass through the undercut 3. Preferably, the plurality of clearance grooves 4 are evenly distributed on the connecting ring 2; the setting of the clearance grooves 4 allows the undercut 3 to deform during the installation process, making the bearing washer easier to install and without damaging the washer body 1.

[0043] As an improvement to this embodiment, the clearance groove 4 extends to the end of the connecting ring 2 near the washer body 1. This configuration enhances the clearance function of the clearance groove 4, increases the deformation capability of the undercut 3, and improves the ease of bearing washer installation.

[0044] As an improvement to this embodiment, a plurality of balls 5 are further included. The balls 5 are movably mounted on the washer body 1 and each ball 5 protrudes from both ends of the washer body 1. Preferably, the balls 5 are evenly distributed on the washer body 1. The arrangement of the balls 5 can change the sliding friction between the washer body 1 and the outside world into rolling friction, and can also reduce the contact area, further reduce the friction force, and prevent the bearing washer from wearing with the adjacent components.

[0045] As an improvement to this embodiment, the ball bearing 5 is made of steel or ceramic material; and / or the washer body 1 is made of plastic. Using steel or ceramic ball bearings 5 ​​can increase their hardness and extend their service life; while using plastic washer body 1, while fulfilling the basic functions of a bearing washer, can reduce material costs; preferably, plastics such as PA, POM, and PC can be used.

[0046] Example 2

[0047] like Figures 3 to 10The illustration shows an embodiment 1 of an easily detachable and assembleable knife according to the present invention, comprising a knife body 11, a handle assembly 12, and an adjusting head pin assembly 13. The handle assembly 12 includes a first handle trim piece 121, a first mask 122, a second mask 123, and a second handle trim piece 124, which are detachably connected in sequence. It also includes two bearing washers as described above, namely a first bearing washer 14 and a second bearing washer 15. The first bearing washer 14 passes through the first mask 122 and is detachably connected to it, and the second bearing washer 15 passes through the second mask 123 and is detachably connected to it. The knife body 11 is located between the first mask 122 and the second mask 123. The adjusting head pin assembly 13 is arranged to pass through the first handle trim piece 121, the first bearing washer 14, the knife body 11, and the second bearing washer 15 in sequence.

[0048] The easy-to-disassemble knife of this utility model mainly consists of three parts. The adjusting head pin assembly 13 is used to install the knife body 11 onto the fixed base handle assembly 12. The knife body 11 is a consumable part. After the knife body 11 is broken or worn, the knife can be disassembled and the knife body 11 can be replaced and reinstalled for use. During the disassembly process, only the adjusting head pin assembly 13 needs to be removed to maintain the integrity of the handle assembly 12. Since the bearing washer with the inverted buckle structure is used, it can be installed and fixed between the handle trim piece and the mask piece. Even after the adjusting head pin assembly 13, which is used as the central shaft, is disassembled, it can still be firmly fixed in the installation position.

[0049] As an improvement to this embodiment, it further includes a first fixing piece 126 and a second fixing piece 127. The first fixing piece 126 is located between the first handle trim piece 121 and the first mask piece 122 and is embedded in the first handle trim piece 121. The second fixing piece 127 is located between the second handle trim piece 124 and the second mask piece 123 and is embedded in the second handle trim piece 124. The undercut end of the first bearing washer 14 is inserted into the first fixing piece 126, and the undercut end of the second bearing washer 15 is inserted into the second fixing piece 127.

[0050] The first fixing plate 126 is used to fix the first bearing washer 14, so that the first bearing washer 14 does not need to rely on the intermediate shaft. The first fixing plate 126 is installed and fixed by the first handle trim plate 121 and the first mask plate 122. Preferably, a countersunk hole is opened in the first handle trim plate 121, and the first fixing plate 126 is installed in the countersunk hole, thereby reducing the overall thickness of the tool. When changing the tool body 11, after the adjusting head pin assembly 13 is disassembled, the bearing washer can always be fixed in the handle assembly 12, which can effectively prevent the washer from being damaged or lost. The second fixing plate 127 is set in the same way as the first fixing plate 126; the second bearing washer 15 is set in a similar way to the first bearing washer 14. Furthermore, the first mask 122 and the first fixing plate 126 are riveted together by rivets 125 to ensure that the head hole of the first mask 122 and the head hole of the first fixing plate 126 are concentric; at the same time, a countersunk hole is dug on the inner side of the first fixing plate 126 to install the undercut part of the first bearing washer 14; the structure of the second fixing plate 127 is similar to that of the first fixing plate 126.

[0051] The installation process of the handle assembly 12 is as follows: The first mask 122 and the first fixing plate 126 are riveted together using three rivets 125. Similarly, the second mask 123 and the second fixing plate 127 are riveted together using three rivets 125. Then, the first bearing washer 14 is inserted into the first mask 122 and connected to the first fixing plate 126. The second bearing washer 15 is inserted into the second mask 123 and connected to the second fixing plate 127. Finally, the first handle trim piece 121 and the second handle trim piece 124 are assembled together using screws to form the handle assembly 12.

[0052] As an improvement to this embodiment, the adjusting head pin assembly 13 includes a head pin 131 and an adjusting knob 132. The head pin 131 passes through the adjusting knob 132 and is threadedly connected to it. The head pin 131 also passes through the first handle trim piece 121, the first fixing piece 126, the first bearing washer 14, the blade body 11, the second bearing washer 15, and the second fixing piece 127 in sequence. The adjusting knob 132 is located outside the first handle trim piece 121.

[0053] The adjusting head pin assembly 13 serves two purposes: firstly, it acts as a pivot, allowing the tool body 11 to rotate and fold relative to the handle assembly 12; secondly, it adjusts the tightness between the tool body 11 and the handle assembly 12. Specifically, the adjusting knob 132 locks the head pin 131, preventing it from rotating counterclockwise relative to the handle assembly 12 during use, thus ensuring the reliability of the tool body 11 during installation and use. Furthermore, the adjusting knob 132 can be used to adjust the smoothness of the tool body 11's rotation, ensuring both smooth rotation and preventing head wobble, while also reducing the machining accuracy of the head pin 131. A slight interference fit between the head pin 131 and the handle assembly 12 can prevent the head pin 131 from slipping out. In this embodiment, the blade body 11 can rotate relative to the handle assembly 12. When the blade is not in use, the blade body 11 can be folded and stored in the handle assembly 12. Of course, within the knowledge of those skilled in the art, the blade body 11 can also be made into a structure that is fixedly connected to the handle assembly 12. In this structure, the blade body 11 cannot rotate or fold relative to the handle assembly 12.

[0054] As an improvement to this embodiment, the end of the pin 131 protrudes outward with a locking portion 1311, and the second fixing plate 127 has a through hole 1271. A locking position 1272 is provided along the edge of the through hole 1271. When the pin 131 passes through the through hole 1271 and is rotated until the locking portion 1311 aligns with the locking position 1272, the pin 131 cannot be pulled out of the second fixing plate 127. When the locking portion 1311 is located in the through hole 1271, the pin 131 can be pulled out of the second fixing plate 127. Here, the pin 131 and the handle assembly 12 can be clearance-fitted. The locking portion 1311 and the through hole 1271 cooperate to allow the pin 131 to be freely pulled out. However, when the pin 131 is rotated to align the locking portion 1311 with the locking position 1272, the pin 131 cannot be pulled out of the handle assembly 12, ensuring the reliability of the blade body 11 assembly. Preferably, the locking part 1311 is similar to an inverted buckle structure, and the shape of the through hole 1271 matches the locking part 1311, allowing the locking part 1311 to pass through. The locking position 1272 is a groove extending outward from the through hole 1271, and the groove communicates with the through hole 1271. When the locking part 1311 rotates to engage with the groove, the head pin 131 is limited, and at this time the head pin 131 cannot be pulled out from the through hole 1271. The position of the groove determines the rotation angle at which the head pin 131 is limited. Preferably, after the blade body 11 is installed, it is necessary to rotate the head pin 131 90° clockwise so that the locking part 1311 of the head pin 131 engages with the locking position 1272 of the second fixing piece 127, so that the blade does not loosen during use.

[0055] The installation process of the knife is as follows: First, assemble the handle assembly 12, then insert the knife body 11 into the middle part of the handle assembly 12, then insert the head pin 131 and the adjustment knob 132 into the handle assembly 12 and the knife body 11 in sequence, then rotate the head pin 131 clockwise to 90°, and tighten the adjustment knob 132 clockwise to the appropriate state to complete the knife assembly.

[0056] As an improvement to this embodiment, the handle assembly 12 further includes a clamping part 129, which is mounted on the outside of the first handle trim piece 121 or the second handle trim piece 124. The clamping part 129 facilitates the suspension of the tool.

[0057] Example 3

[0058] like Figure 11 and Figure 12 The following is another embodiment of a knife that is easy to assemble and disassemble. This embodiment is similar to embodiment 2, except that it also includes a limiting spring 128. The limiting spring 128 is installed inside the first mask 122 or inside the second mask 123 and can abut against the end of the knife body 11.

[0059] The limiting spring 128 is used to limit the blade body 11. When the blade is in use and the blade body 11 is rotated out of the handle assembly 12 and unfolded with the handle assembly 12, the limiting spring 128 is used to prevent the blade body 11 from rotating and folding into the handle assembly 12 during use.

[0060] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating this utility model, and are not intended to limit the implementation of this utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A bearing washer, characterized in that, The device includes a hollow washer body (1), a connecting ring (2), and a buckle (3) connected in sequence. The cross-sectional area of ​​the washer body (1) is larger than that of the connecting ring (2), and the cross-sectional area of ​​the buckle (3) near the end of the connecting ring (2) is larger than that of the connecting ring (2).

2. The bearing washer according to claim 1, characterized in that, The connecting ring (2) is provided with a plurality of clearance grooves (4) in sequence along the circumference, and the clearance grooves (4) are provided through the buckle (3).

3. The bearing washer according to claim 2, characterized in that, The clearance groove (4) extends to the end of the connecting ring (2) near the washer body (1).

4. The bearing washer according to any one of claims 1 to 3, characterized in that, It also includes a number of balls (5), which are movably mounted on the washer body (1) and each ball (5) protrudes from both ends of the washer body (1).

5. The bearing washer according to claim 4, characterized in that, The ball (5) is made of steel or ceramic material; and / or the washer body (1) is made of plastic.

6. A cutting tool that is easy to assemble and disassemble, characterized in that, The device includes a blade body (11), a handle assembly (12), and an adjusting head pin assembly (13). The handle assembly (12) includes a first handle trim piece (121), a first mask (122), a second mask (123), and a second handle trim piece (124) that are detachably connected in sequence. It also includes two bearing washers as described in any one of claims 1 to 5. The two bearing washers are a first bearing washer (14) and a second bearing washer (15). The first bearing washer (14) passes through the first mask (122) and is detachably connected to it. The second bearing washer (15) passes through the second mask (123) and is detachably connected to it. The blade body (11) is located between the first mask (122) and the second mask (123). The adjusting head pin assembly (13) is arranged to pass through the first handle trim piece (121), the first bearing washer (14), the blade body (11), and the second bearing washer (15) in sequence.

7. The easily detachable cutting tool according to claim 6, characterized in that, It also includes a first fixing piece (126) and a second fixing piece (127). The first fixing piece (126) is located between the first handle trim piece (121) and the first mask piece (122) and is embedded in the first handle trim piece (121). The second fixing piece (127) is located between the second handle trim piece (124) and the second mask piece (123) and is embedded in the second handle trim piece (124). The undercut end of the first bearing washer (14) is inserted into the first fixing piece (126), and the undercut end of the second bearing washer (15) is inserted into the second fixing piece (127).

8. The easily detachable cutting tool according to claim 7, characterized in that, The adjusting head pin assembly (13) includes a head pin (131) and an adjusting knob (132). The head pin (131) passes through the adjusting knob (132) and is threadedly connected to it. The head pin (131) also passes through the first handle trim piece (121), the first fixing piece (126), the first bearing washer (14), the blade body (11), the second bearing washer (15), and the second fixing piece (127) in sequence. The adjusting knob (132) is located outside the first handle trim piece (121).

9. The easily detachable cutting tool according to claim 8, characterized in that, The end of the pin (131) has a snap-fit ​​portion (1311) protruding outward. The second fixing piece (127) has a through hole (1271) and a snap-fit ​​position (1272) is provided along the edge of the through hole (1271). When the pin (131) passes through the through hole (1271) and rotates until the snap-fit ​​portion (1311) is aligned with the snap-fit ​​position (1272), the pin (131) cannot be pulled out from the second fixing piece (127). When the snap-fit ​​portion (1311) is located in the through hole (1271), the pin (131) can be pulled out from the second fixing piece (127).

10. The easily detachable cutting tool according to claim 7, characterized in that, It also includes a limiting spring (128), which is installed inside the first mask (122) or the second mask (123) and can abut against the end of the blade body (11).

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