Pliers convenient to disassemble
By using a double-sleeve structure of connecting sleeve and insert sleeve, as well as a bolt washer design, the problem of inconvenient disassembly and cleaning of existing pliers is solved, enabling easy disassembly and self-adjustment of the pliers, making them suitable for use scenarios with high hygiene requirements.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- JIANGSU SHENGDE SCISSORS MFG CO LTD
- Filing Date
- 2025-08-06
- Publication Date
- 2026-06-23
AI Technical Summary
Existing pliers are inconvenient to disassemble and assemble due to their rivet-fixed structure, cannot be adjusted for tightness, and are difficult to clean internally, easily accumulating dirt and grime, affecting hygiene and user experience.
The clamp legs feature a double-sleeve structure with a connecting sleeve and a plug sleeve, along with a bolt washer design, enabling detachable connection and sealing. Users can adjust the tightness with a screwdriver, and the clamps are also detachable for cleaning.
It enables easy disassembly and self-adjustment of the forceps, ensuring internal cleanliness and making it suitable for use in high-hygiene environments, such as medical surgical forceps. It also prevents lubricant leakage and improves the user experience.
Smart Images
Figure CN224390840U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of pliers technology, and more particularly to a pair of pliers that is easy to assemble and disassemble, easy to clean, and whose tightness can be manually adjusted by the user. Background Technology
[0002] Traditional riveted sliding joint pliers, such as wire cutters, needle-nose pliers, and diagonal pliers, are all sliding joint pliers that use rivets as the pivot. These types of pliers generally use solid rivets that pass through the pivot holes of the two pliers bodies and are permanently fixed by cold riveting or hot riveting.
[0003] For example, Chinese invention patent CN108698208A discloses a pair of pliers with two cross-arranged plier legs, each plier leg forming a handle. The handle transitions from one side of the cross area of the plier legs to the jaws. The handle and jaws constitute the plier legs. The joints of the pliers are embedded joints. For this purpose, the plier legs have material notches in the cross area, and the sections of the other plier legs extend into the notch area. The fixed joints are also formed by joint pins, which are solid rivet pins.
[0004] The sliding joint clamps mentioned above that use rivets as pivots have the following drawbacks in practical applications: 1. The clamp legs are fixed with rivets, requiring experienced workers to install them with riveting equipment and auxiliary equipment to adjust the tightness, making installation time-consuming and labor-intensive.
[0005] 2. Permanent connections are achieved through riveting, which users cannot disassemble or adjust the tightness themselves. Once the rivet deforms, it will create an unadjustable fastening force.
[0006] 3. During the factory production process, riveting is not the final process. There are many subsequent processes that will generate dirt that enters the joints of the pliers. However, since they cannot be disassembled, they cannot be cleaned. By the time they reach the consumer, the inside of the pliers is actually full of dirt. With the accumulation of dirt over a long period of use, the pliers are only suitable for use in scenarios where hygiene requirements are low.
[0007] 4. The rivet structure uses lubricating oil, which will deteriorate and turn black during use. Since there is no sealing design at the rivet, oil will seep out from the gaps between the rivets during later use, which can easily stain hands or clothes.
[0008] Therefore, existing pliers still have many shortcomings in practical applications, and it is necessary to propose a new technical solution to solve the problems existing in the current technology. Utility Model Content
[0009] This application provides a pair of pliers that is easy to disassemble and assemble, in order to solve the problems of existing pliers being inconvenient to disassemble and assemble, resulting in the inability to clean them and adjust the tightness.
[0010] To achieve the above objectives, this application provides the following technical solution:
[0011] This application provides a pair of pliers that is easy to assemble and disassemble, including a left and a right pair of pliers arranged in a cross configuration. The left pliers include a left handle, a left pliers shaft, and a left pliers head connected in sequence. The right pliers include a right handle, a right pliers shaft, and a right pliers head connected in sequence. The left pliers shaft includes a left connecting seat, and the right pliers shaft includes a right connecting seat. The left and right connecting seats are stacked vertically. A connecting groove is formed on the surface of the left connecting seat facing the right connecting seat. A connecting cylinder is concentrically arranged in the connecting groove. The connecting cylinder has an internal thread. The inner wall of the connecting groove and the outer wall of the connecting cylinder form an annular mounting groove. A gasket mounting groove and a connector are concentrically arranged on the right connecting seat. The gasket mounting groove is located on the surface facing away from the left connecting seat, and the connector is located on the surface facing the left connecting seat. A connecting hole is formed at the center of the bottom of the gasket mounting groove. The connector is fitted into the annular mounting groove, and the connecting hole and the connecting cylinder correspond vertically to form mounting holes for mounting bolts.
[0012] In a preferred embodiment of this application, the connecting groove is a circular groove, and the connecting cylinder is a hollow cylinder protruding upward from the bottom of the connecting groove, wherein the axial length of the connecting cylinder is greater than the depth of the connecting groove.
[0013] In a preferred embodiment of this application, the gasket mounting groove is used to install a gasket; the connector cylinder is a hollow cylinder protruding downward from the surface of the right connector, the inner diameter of the connector cylinder is the same as the outer diameter of the connector cylinder, and the outer diameter of the connector cylinder is the same as the inner diameter of the connecting groove.
[0014] In a preferred embodiment of this application, when the connector sleeve is inserted into the annular mounting groove, the top of the connector sleeve abuts against the bottom of the gasket mounting groove, and the internal threaded hole formed on the connector sleeve communicates with the connecting hole.
[0015] In a preferred embodiment of this application, the left clamp shaft and the right clamp shaft are detachably connected by bolts and washers; the left handle and the right handle are driven to move closer to each other or further away from each other, and the right clamp shaft rotates by engaging with the annular mounting groove of the left clamp shaft through a connector sleeve to achieve the movement of the left clamp head and the right clamp head closer to each other or further away from each other.
[0016] In a preferred embodiment of this application, the left handle includes a first arc segment and a second arc segment connected to the first arc segment. The end of the first arc segment is connected to the left clamp shaft. A horizontal shaft is provided on the side wall of the first arc segment facing the right handle. A boss is provided on the end side wall of the second arc segment facing the right handle. A through hole is provided on the boss, and the central axis of the through hole is parallel to the central axis of the bolt. A through groove is provided at the end of the second arc segment, extending from the end of the second arc segment towards the first arc segment. The boss is divided into two symmetrical parts by the through groove. The curvature of the first arc segment is greater than that of the second arc segment.
[0017] In a preferred embodiment of this application, the right grip includes a third arc segment and a fourth arc segment connected to the third arc segment. The end of the third arc segment is connected to the right clamp shaft. A horizontal shaft is provided on the side wall of the third arc segment facing the left grip. A boss is provided on the end side wall of the fourth arc segment facing the left grip. A through hole is provided on the boss, and the central axis of the through hole is parallel to the central axis of the bolt. A through groove is provided at the end of the fourth arc segment, extending from the end of the fourth arc segment towards the third arc segment. The boss is divided into two symmetrical parts by the through groove. The curvature of the third arc segment is greater than that of the fourth arc segment.
[0018] In a preferred embodiment of this application, the structure of the left handle is symmetrical to the structure of the right handle.
[0019] Compared with the prior art, this application has at least the following beneficial effects:
[0020] 1. This application achieves a secure connection between the left and right jaw legs through the internal threaded hole and bolt of the connecting sleeve. Users can adjust the tightness of the pliers by adjusting the bolt with a screwdriver. Simultaneously, this application utilizes a double-sleeve structure of the connecting sleeve and the insert sleeve to achieve a sliding rotational engagement between the left and right jaw legs. Manually driving the left and right handles closer or further apart will cause the insert sleeve to rotate within the annular mounting groove, thereby driving the left and right jaw heads closer or further apart. Therefore, this application replaces the traditional riveting method of pliers with a combination of the double-sleeve structure of the connecting sleeve and the insert sleeve, along with the bolt washer structure. Assembly is simple, requiring only a screwdriver, eliminating the need for specialized equipment such as riveting guns or punch presses, resulting in low assembly difficulty and high assembly efficiency. Furthermore, users can adjust the tightness of the pliers themselves by adjusting the bolt with a screwdriver, solving the problem of loosening or jamming after prolonged use. Consumers can maintain the product themselves, extending its lifespan. Moreover, after removing the bolt, the left and right jaw legs can be completely separated, allowing for direct washing of internal dirt, solving the problem of "dirt accumulation" in traditional riveting pliers.
[0021] 2. In this application, the insert sleeve is inserted into the annular mounting groove, the connecting sleeve is inserted into the insert sleeve, the top of the connecting sleeve abuts against the gasket mounting groove, and the connecting hole is connected to the internal thread hole of the connecting sleeve. Therefore, in this application, the connecting sleeve and the insert sleeve are fitted together to form an axial and radial double sealing structure, which significantly reduces the entry of chips and dust from subsequent processes in the factory. The dust and dirt accumulated by the user during use can be rinsed by unscrewing the bolts and disassembling the left and right clamp legs.
[0022] 3. Brass gaskets, rubber gaskets, or PTFE gaskets can be placed in the gasket mounting groove of this application. After the bolts are tightened, an end face seal is formed to prevent lubricating oil from leaking out and avoid "dirty hands and clothes".
[0023] 4. This application uses a double-layer sleeve structure composed of a connecting sleeve and a plug sleeve to form axial support and radial limiting, disperse bolt shear force, improve the bolt's torsional strength, and ensure structural strength and overall reliability.
[0024] 5. The pliers provided in this application can remove bolts for thorough cleaning, ensuring hygiene and cleanliness. Therefore, compared with traditional rivet pliers, the pliers provided in this application can be adapted to usage scenarios with high hygiene requirements, such as being used as medical surgical forceps. Attached Figure Description
[0025] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the embodiments will be briefly described below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. It should be understood that the specific shapes and structures shown in the drawings should not generally be regarded as limiting conditions for implementing this application; for example, based on the technical concepts disclosed in this application and the exemplary drawings, those skilled in the art are able to easily make conventional adjustments or further optimizations to the addition / reduction / classification, specific shapes, positional relationships, connection methods, and size ratios of certain units (components).
[0026] Figure 1 An exploded view of the three-dimensional structure of the pliers provided in this application in one embodiment;
[0027] Figure 2 for Figure 1 The exploded view of the structure is shown as a side view schematic diagram;
[0028] Figure 3 This is a schematic diagram of the left clamp shaft portion from a first perspective in one embodiment.
[0029] Figure 4 This is a schematic diagram of the left clamp shaft portion from a second perspective in one embodiment;
[0030] Figure 5 This is a schematic diagram of the right clamp shaft portion from a first perspective in one embodiment.
[0031] Figure 6 This is a schematic diagram of the right clamp shaft portion from a second perspective in one embodiment.
[0032] Figure 7 This is a schematic diagram of the planar structure of the pliers in an assembled state in one embodiment;
[0033] Figure 8 This is a three-dimensional structural diagram of the pliers in an assembled state from a first perspective in one embodiment.
[0034] Figure 9 This is a three-dimensional structural diagram of the pliers in an assembled state from a second perspective in one embodiment.
[0035] Figure 10 This is a schematic diagram of the through groove and boss at the tail of the left handle in one embodiment of this application.
[0036] Explanation of reference numerals in the attached figures:
[0037] 100. Left clamp leg; 110. Left handle; 111. First arc segment; 112. Second arc segment; 113. Horizontal shaft; 114. Boss; 115. Through groove; 120. Left clamp shaft; 121. Connecting cylinder; 122. Annular mounting groove; 130. Left clamp head;
[0038] 200. Right clamp leg; 210. Right handle; 211. Third arc segment; 212. Fourth arc segment; 220. Right clamp shaft; 221. Washer mounting slot; 222. Connecting hole; 223. Connecting sleeve; 230. Right clamp head;
[0039] 300. Gasket;
[0040] 400. Bolts. Detailed Implementation
[0041] The present application will be further described in detail below with reference to the accompanying drawings and specific embodiments.
[0042] In the description of this application: unless otherwise stated, "a plurality of" means two or more. The terms "first," "second," "third," "fourth," etc., used in this application are intended to distinguish the objects they refer to and do not have any particular meaning in terms of technical connotation (e.g., they should not be construed as an emphasis on importance or order). Expressions such as "including," "comprising," and "having" also mean "not limited to" (certain units, components, materials, steps, etc.).
[0043] The terms used in this application, such as "upper," "lower," "left," "right," and "middle," are generally used to facilitate intuitive understanding by referring to the accompanying drawings, and are not absolute limitations on the positional relationships in the actual product. Changes in these relative positional relationships, without departing from the technical concept disclosed in this application, should also be considered within the scope of this application.
[0044] This application provides a pair of pliers that is easy to assemble and disassemble, and whose general structure is similar to that of conventional pliers. See also Figure 7 The pliers provided in this application include a left jaw 100 and a right jaw 200 arranged in a cross configuration. See details... Figure 1 The left jaw 100 includes a left handle 110, a left jaw shaft 120, and a left jaw head 130 connected in sequence; the right jaw 200 includes a right handle 210, a right jaw shaft 220, and a right jaw head 230 connected in sequence. See also Figure 8 , 9 The left clamp shaft portion 120 includes a left connecting seat, and the right clamp shaft portion 220 includes a right connecting seat. The left and right connecting seats are stacked vertically. The structure of the left clamp head 130 and the right clamp head 230 in this application can be any of the existing clamp head structures. Depending on the clamp head structure, the pliers provided in this application can be needle-nose pliers, diagonal-nose pliers, flat-nose pliers, round-nose pliers, slub pliers, pump pliers, wire cutters, snap ring pliers, heavy-duty pliers, wire strippers, curved-nose pliers, flat-nose pliers, top-cutting pliers, etc.
[0045] The main difference between this application and conventional pliers is that the left plier shaft 120 and the right plier shaft 220 are detachably connected. The detachable connection structure of the left plier shaft 120 and the right plier shaft 220 in this application will be described in detail below.
[0046] In this application, the left clamp shaft portion 120 includes a left connecting seat, and the right clamp shaft portion 220 includes a right connecting seat. The left and right connecting seats are stacked and installed vertically. Wherein:
[0047] See Figure 3 , 4 A connecting groove is provided on the surface of the left connecting seat facing the right connecting seat. A connecting cylinder 121 is concentrically arranged in the connecting groove. The connecting cylinder 121 has an internal thread. The inner wall of the connecting groove and the outer wall of the connecting cylinder 121 form an annular mounting groove 122.
[0048] See Figure 5 , 6 The right connector has a gasket mounting groove 221 and a connector sleeve 223 concentrically arranged on it. The gasket mounting groove 221 is located on the surface opposite to the left connector, and the connector sleeve 223 is located on the surface facing the left connector. A connecting hole 222 is formed at the center of the bottom of the gasket mounting groove 221. See also Figure 2During assembly, the insert sleeve 223 is fitted into the annular mounting groove 122, and the connecting hole 222 and the connecting sleeve 121 correspond to form mounting holes for mounting bolts 400.
[0049] The aforementioned structure allows for the secure connection of the left jaw leg 100 and the right jaw leg 200 via the internal threaded hole of the connecting sleeve 121 and the bolt 400. The user can adjust the tightness of the pliers by adjusting the bolt 400 with a screwdriver. Simultaneously, this application utilizes the double-sleeve structure of the connecting sleeve 121 and the insert sleeve 223 to achieve a sliding rotational engagement between the left jaw leg 100 and the right jaw leg 200. Manually driving the left and right handles 210 closer or further apart will cause the insert sleeve 223 to rotate within the annular mounting groove 122, thereby driving the left jaw head 130 and the right jaw head 230 closer or further apart. Therefore, this application replaces the traditional rivet fixing method of pliers with a double-sleeve structure of connecting sleeve 121 and insert sleeve 223 and a structure of bolt 400 washer. During assembly, only a screwdriver is needed for simple disassembly and assembly, without the need for professional equipment such as rivet guns and punch presses. The assembly difficulty is low and the assembly efficiency is high. In addition, users can adjust the tightness of the pliers by adjusting the bolt with a screwdriver, which solves the problem of loosening or jamming after long-term use. Consumers can maintain it themselves and extend the product's service life. Furthermore, after removing the bolt, the left and right plier legs can be completely separated, and the internal dirt can be directly rinsed, solving the problem of "dirt and grime" in traditional rivet pliers.
[0050] In a preferred embodiment of this application, a gasket 300 is installed in the gasket mounting groove 221. The gasket can be a brass gasket, a rubber gasket, or a PTFE gasket, etc. After the bolt 400 is tightened, the gasket can form an end face seal to prevent lubricating oil from leaking out and avoid "dirty hands and clothes".
[0051] In a preferred embodiment of this application, the connecting groove on the left connecting seat is a circular groove, and the connecting cylinder 121 is a hollow cylinder protruding upward from the bottom of the connecting groove. The axial length of the connecting cylinder 121 is greater than the depth of the connecting groove. Figure 2 The connector 223 is a hollow cylinder protruding downwards from the surface of the right connector. The inner diameter of the connector 223 is the same as the outer diameter of the connector 121, and the outer diameter of the connector 223 is the same as the inner diameter of the connecting groove. When the connector 223 is inserted into the annular mounting groove 122, the top of the connector 121 abuts against the bottom of the gasket mounting groove 221, and the internal threaded hole formed on the connector 121 communicates with the connecting hole 222. Therefore, in this application, the left clamp shaft 120 and the right clamp shaft 220 are detachably connected by bolts 400 and gaskets.
[0052] In this application, the insert sleeve 223 is inserted into the annular mounting groove 122, and the connecting sleeve 121 is inserted into the insert sleeve 223. The top of the connecting sleeve 121 abuts against the gasket mounting groove 221, and the connecting hole 222 communicates with the internal threaded hole of the connecting sleeve 121. Therefore, the connecting sleeve and the insert sleeve in this application form an axial and radial double sealing structure, which significantly reduces the entry of chips and dust from subsequent processes in the factory. The dust and dirt accumulated by the user during use can be rinsed by unscrewing the bolts and disassembling the left and right clamp legs.
[0053] In this application, the left handle 110 and the right handle 210 are driven to move closer to each other or further away from each other. The right clamp shaft 220 rotates by engaging with the annular mounting groove 122 of the left clamp shaft 120 through the insertion sleeve 223, thereby enabling the left clamp head 130 and the right clamp head 230 to move closer to each other or further away from each other.
[0054] In a preferred embodiment of this application, see [link to application]. Figure 7 The structure of the left grip 110 is symmetrical to that of the right grip 210. For details, see: Figure 1 The left grip 110 includes a first arc segment 111 and a second arc segment 112 connected to the first arc segment 111. The end of the first arc segment 111 is connected to the left clamp shaft 120. A horizontal shaft 113 is provided on the side wall of the first arc segment 111 facing the right grip 210. A boss 114 is provided on the end side wall of the second arc segment 112 facing the right grip 210. A through hole is provided on the boss 114, and the central axis of the through hole is parallel to the central axis of the bolt 400. A through groove 115 is provided at the end of the second arc segment 112. The through groove 115 extends from the end of the second arc segment 112 toward the first arc segment 111. The boss 114 is divided into two symmetrical parts by the through groove 115. The curvature of the first arc segment 111 is greater than that of the second arc segment 112.
[0055] The right grip 210 includes a third arc segment 211 and a fourth arc segment 212 connected to the third arc segment 211. The end of the third arc segment 211 is connected to the right clamp shaft 220. A horizontal shaft is provided on the side wall of the third arc segment 211 facing the left grip 110. A boss is provided on the end side wall of the fourth arc segment 212 facing the left grip 110. A through hole is provided on the boss, and the central axis of the through hole is parallel to the central axis of the bolt. A through groove is provided at the end of the fourth arc segment 212. The through groove extends from the end of the fourth arc segment 212 toward the third arc segment 211. The boss is divided into two symmetrical parts by the through groove. The curvature of the third arc segment 211 is greater than that of the fourth arc segment 212.
[0056] The first arc segment 111 and the third arc segment 211 have high curvature, so they serve as elastic deformation zones on the handle and preferentially undergo controllable elastic deformation under gripping force to absorb impact loads. In contrast, the second arc segment 112 and the fourth arc segment 212 have low curvature, which can serve as rigid support zones to maintain the overall structural stability. This handle structure design significantly reduces stress concentration at the pliers shaft and avoids fatigue cracks caused by abrupt changes in cross-section in traditional straight-handle pliers.
[0057] In practical applications, the through slots and protrusions with through holes at the ends of the left and right handles can form a standardized interface, allowing for the quick installation of auxiliary modules. For example, inserting a spring plate can convert it into an automatic reset pliers, and adding a torque wrench can achieve precise force control.
[0058] In summary, this application provides a pair of pliers that is easy to assemble and disassemble. Because of its ease of assembly and disassembly, users can manually adjust the tightness and thoroughly clean it after disassembly. Therefore, the pliers provided by this application can be used in scenarios with high hygiene requirements, such as as medical surgical forceps. Furthermore, the pliers provided by this application employ a double-sleeve structure with a connecting sleeve and a insert sleeve, along with internal threaded holes and bolts, to achieve a detachable connection between the left and right clamp legs. This structure allows for the installation of washers, which, after the bolts are tightened, form an end-face seal, preventing lubricant leakage and avoiding "dirty hands and clothes," thus improving the user experience.
[0059] The technical features of the above embodiments can be combined in any way (as long as there is no contradiction in the combination of these technical features). For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described; these embodiments not explicitly written should also be considered to be within the scope of this specification.
[0060] The present application has been described in a relatively specific and detailed manner above through general descriptions and specific embodiments. It should be understood that, based on the technical concept of the present application, several conventional adjustments or further innovations can be made to these specific embodiments; however, as long as they do not depart from the technical concept of the present application, the technical solutions obtained by these conventional adjustments or further innovations also fall within the protection scope of the claims of the present application.
Claims
1. A pair of pliers that is easy to assemble and disassemble, characterized in that, It includes a left jaw leg and a right jaw leg arranged in a cross configuration. The left jaw leg includes a left handle, a left jaw shaft and a left jaw head connected in sequence. The right jaw leg includes a right handle, a right jaw shaft and a right jaw head connected in sequence. The left jaw shaft includes a left connecting seat and the right jaw shaft includes a right connecting seat. The left connecting seat and the right connecting seat are stacked on top of each other. The left connecting seat has a connecting groove on its surface facing the right connecting seat. A connecting cylinder is concentrically arranged in the connecting groove. The connecting cylinder has an internal thread. The inner wall of the connecting groove and the outer wall of the connecting cylinder form an annular mounting groove. The right connecting seat has a gasket mounting groove and a connector cylinder concentrically arranged. The gasket mounting groove is located on the surface opposite to the left connecting seat, and the connector cylinder is located on the surface facing the left connecting seat. A connecting hole is opened at the center of the bottom of the gasket mounting groove. The connector cylinder is adapted to be inserted into the annular mounting groove. The connecting hole and the connecting cylinder correspond vertically to form a mounting hole for installing bolts.
2. The pliers for easy assembly and disassembly according to claim 1, characterized in that, The connecting groove is a circular groove, and the connecting cylinder is a hollow cylinder protruding upward from the bottom of the connecting groove. The axial length of the connecting cylinder is greater than the depth of the connecting groove.
3. The pliers for easy assembly and disassembly according to claim 1, characterized in that, The gasket mounting groove is used to install gaskets; the connector cylinder is a hollow cylinder protruding downward from the surface of the right connector, the inner diameter of the connector cylinder is the same as the outer diameter of the connector cylinder, and the outer diameter of the connector cylinder is the same as the inner diameter of the connector groove.
4. The pliers for easy assembly and disassembly according to claim 1, characterized in that, When the connector sleeve is inserted into the annular mounting groove, the top of the connector sleeve abuts against the bottom of the gasket mounting groove, and the internal threaded hole formed on the connector sleeve is connected to the corresponding connecting hole.
5. The pliers for easy assembly and disassembly according to claim 1, characterized in that, The left clamp shaft and the right clamp shaft are detachably connected by bolts and washers; The left and right grips are driven to move closer or further apart. The right clamp shaft rotates by engaging with the annular mounting groove of the left clamp shaft through a connecting sleeve, thereby enabling the left and right clamp heads to move closer or further apart.
6. The pliers for easy assembly and disassembly according to claim 1, characterized in that, The left grip includes a first arc segment and a second arc segment connected to the first arc segment. The end of the first arc segment is connected to the left clamp shaft. A horizontal shaft is provided on the side wall of the first arc segment facing the right grip. A boss is provided on the end side wall of the second arc segment facing the right grip. A through hole is provided on the boss. The central axis of the through hole is parallel to the central axis of the bolt. A through groove is provided at the end of the second arc segment, and the through groove extends from the end of the second arc segment toward the first arc segment. The boss is divided into two symmetrical parts by the through groove. The degree of curvature of the first arc segment is greater than that of the second arc segment.
7. The pliers for easy assembly and disassembly according to claim 1 or 6, characterized in that, The right grip includes a third arc segment and a fourth arc segment connected to the third arc segment. The end of the third arc segment is connected to the right clamp shaft. A horizontal shaft is provided on the side wall of the third arc segment facing the left grip. A boss is provided on the end side wall of the fourth arc segment facing the left grip. A through hole is provided on the boss. The central axis of the through hole is parallel to the central axis of the bolt. The end of the fourth arc segment is provided with a through groove, which extends from the end of the fourth arc segment toward the third arc segment. The boss is divided into two symmetrical parts by the through groove. The degree of curvature of the third arc segment is greater than that of the fourth arc segment.
8. The pliers for easy assembly and disassembly according to claim 7, characterized in that, The structure of the left grip is symmetrical to that of the right grip.