A circlip pliers with opening locking and inside-outside clamping conversion functions

Abstract

The present invention relates to the technical field of manual hardware tools, and in particular to a type of circlip pliers with an open locking and inside-outside clamp conversion function, comprising a fixed handle, a positioning groove of a special structure is provided inside the fixed handle near the upper end, a shift pin adapted thereto is mounted inside the positioning groove, a detachable conversion chuck is mounted on the shift pin on the front side of the fixed handle; a shift adjustment groove adapted thereto is provided on the side of the conversion chuck that abuts the fixed handle, the conversion chuck is sleeved on the front end of the shift pin through the shift adjustment groove, a through groove is provided inside the shift pin, a connecting rod is provided inside the through groove, a baffle is fixedly provided at the right end of the connecting rod, and a tension spring is sleeved on the connecting rod between the baffle and the limiting ring. The present invention is easy to operate and has various functions, and is suitable for installation and removal of circlips in various working environments. Through its innovative structural design, it achieves stability and versatility during operation, greatly improving work efficiency and user experience.

Description

Technical Field

[0001] The invention relates to the technical field of manual hardware tools, in particular to a circlip pliers with opening locking and inside-outside clamping conversion functions. Background Art

[0002] Circlip pliers are specialized tools used to install and remove circlips (also known as retaining rings or retaining rings). Circlips, as fasteners, are installed in the shaft or hole slots of a component to constrain the component's axial movement. Circlip pliers are a tool specifically designed for installing and removing circlips. They resemble needle-nose pliers in appearance, and the pliers can have straight internal or external tips, curved internally, or curved externally. Circlip pliers are primarily categorized into two types: external and internal. External circlip pliers, also known as shaft circlip pliers, are used to install and remove circlips that are applied to the outside of the shaft; internal circlip pliers, also known as hole circlip pliers, are used to install and remove circlips that are applied to the inside of a hole.

[0003] Currently, circlip pliers on the market often have a single function and lack a flexible locking mechanism. This can lead to accidental opening due to external forces during use, affecting operational effectiveness and efficiency. Furthermore, most circlip pliers only support a single internal or external locking function, and cannot be quickly switched according to actual needs, limiting their application range. Therefore, it is particularly important to develop circlip pliers that can both securely lock the opening and quickly switch between internal and external locking functions. Summary of the Invention

[0004] In response to the existing deficiencies, the present invention provides a circlip pliers with open locking and inside-outside clamping conversion functions. The circlip pliers are easy to operate and have diverse functions. They are suitable for circlip installation and disassembly work in various working environments. Through innovative structural design, stability and versatility are achieved during operation, greatly improving work efficiency and user experience.

[0005] To achieve the above object, the technical solution adopted by the present invention is:

[0006] A circlip pliers with open locking and inside-outside card switching functions, comprising a fixed handle and a movable handle, wherein a positioning groove of a special structure is opened inside the fixed handle near the upper end, a shift pin adapted to the positioning groove is assembled inside the positioning groove, a rotating pin of an integral structure is fixedly provided at the rear end of the shift pin, a movable handle is rotatably connected to the rotating pin, a second circlip head is fixedly provided at the upper end of the movable handle, a switching chuck is installed on the shift pin on the front side of the fixed handle, and a first circlip head of the same specification as the second circlip head is fixedly provided at the upper end of the switching chuck;

[0007] A shift adjustment groove adapted to the shift pin is formed on one side of the conversion chuck that is attached to the fixed handle. The conversion chuck is sleeved on the front end of the shift pin through the shift adjustment groove. A through groove is formed inside the shift pin. The front end of the through groove is blocked by a limiting ring. A connecting rod is provided inside the through groove. The front end of the connecting rod passes through the limiting ring and is fixedly connected to the bottom of the shift adjustment groove. A blocking piece is fixedly provided on the rear end of the connecting rod. A tension spring is sleeved on the connecting rod between the blocking piece and the limiting ring.

[0008] A fixing pin is fixed on the rear side of the fixed handle, and a rotatable L-shaped locking rod is sleeved on the fixing pin, and the locking rod is located on the right side of the movable handle. Multiple groups of tooth grooves are provided on the side of the movable handle close to the locking rod, and micro teeth are provided on the end of the locking rod that is in contact with the tooth groove, and the micro teeth are engaged with the tooth groove.

[0009] Furthermore, a torsion spring is provided at the connection between the locking rod and the fixing pin, and one end of the torsion spring is fixedly connected to the locking rod, and the other end is fixedly connected to the fixing pin.

[0010] Furthermore, the surface on which the tooth grooves are located on the movable handle is an arc-shaped surface, and the plurality of groups of tooth grooves are evenly arranged along the arc-shaped surface.

[0011] Furthermore, the first retaining spring head and the second retaining spring head are positioned correspondingly, and are both located on the vertical center plane of the fixed handle.

[0012] Furthermore, the lower halves of the fixed handle and the movable handle are both covered with plastic grips (not shown in the figure).

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] 1. The present invention realizes the opening locking function of the circlip pliers by providing a fixed pin and a rotatable L-shaped locking rod on the rear side of the fixed handle, in conjunction with multiple sets of teeth and grooves on the movable handle, effectively preventing the circlip pliers from accidentally opening due to external force during operation, and ensuring stability during operation.

[0015] 2. In the present invention, the shift adjustment groove is used to achieve an adjustable connection between the conversion clamp and the shift pin, allowing the user to adjust the position of the conversion clamp on the shift pin according to actual needs. The position can be switched left and right with the fixed handle, thereby adjusting the opening amount of the conversion clamp and the fixed handle to achieve the conversion between external and internal clamping functions. The internal and external clamping conversion function enables the same tool to adapt to different types of retaining spring installation requirements without the need to replace tools, thereby improving work efficiency and being suitable for retaining spring installation and removal work in various working environments.

[0016] 3. The present invention has a simple structure, adopts a modular detachable structure, and is easy to operate, making the operation process intuitive and easy to understand, reducing the complexity of operation, and greatly improving work efficiency and user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0018] Figure 2 This is a structural schematic diagram from another angle of the present invention.

[0019] Figure 3 It is a schematic diagram of the disassembly structure of the present invention.

[0020] Figure 4 It is a structural schematic diagram of the shift leg in the present invention.

[0021] Figure 5 It is a structural schematic diagram of the fixed legs in the present invention.

[0022] Figure 6 Schematic diagram of the structure of the shift pin in the present invention.

[0023] Figure 7 It is a structural schematic diagram of the movable supporting legs in the present invention.

[0024] Figure 8 Schematic diagram of the structure of the locking rod in the present invention.

[0025] Figure 9 It is a cross-sectional view of the shift leg and the shift pin in the present invention.

[0026] In the figure: 1. Conversion card head; 2. Fixed handle; 3. Movable handle; 4. Locking rod; 5. Shift pin; 6. First retaining spring head; 7. Shift adjustment groove; 8. Positioning groove; 9. Fixed pin; 10. Rotating pin; 11. Second retaining spring head; 12. Pin hole; 13. Micro tooth groove; 14. Micro teeth; 15. Limiting ring; 16. Connecting rod; 17. Tension spring; 18. Through groove; 19. Blocking piece. DETAILED DESCRIPTION

[0027] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0028] Example:

[0029] like Figures 1 to 9As shown, a circlip pliers with open locking and inside-outside card conversion functions includes a fixed handle 2 and a movable handle 3. The fixed handle 2 is provided with a positioning groove 8 with a special structure near the upper end, and a shift pin 5 adapted to it is assembled inside the positioning groove 8. The rear end of the shift pin 5 is fixed with a rotating pin 10 of an integrated structure, and the movable handle 3 is rotatably connected to the rotating pin 10. The upper end of the movable handle 3 is fixed with a second circlip head 11. The shift pin 5 on the front side of the fixed handle 2 is installed with a conversion clamp 1, and the upper end of the conversion clamp 1 is fixed with a first circlip head 6 with the same specifications as the second circlip head 11.

[0030] The side of the shift chuck 1 that fits against the fixed handle 2 features a shift adjustment slot 7 that mates with the shift pin 5. The shift chuck 1 is positioned over the front end of the shift pin 5 through the shift adjustment slot 7. A through slot 18 is defined within the shift pin 5, sealed by a retaining ring 15. A connecting rod 16 is positioned within the slot 18, which passes through the retaining ring 15 and is fixedly connected to the bottom of the shift adjustment slot 7. A retaining plate 19 is fixed to the rear end of the connecting rod 16, and a tension spring 17 is mounted between the retaining plate 19 and the retaining ring 15. The ingenious design of the shift pin 5 and the shift chuck 1 allows for quick switching between internal and external circlip functions. The shift adjustment slot 7 within the shift chuck 1 mates with the shift pin 5. By pulling the shift chuck 1 outward to separate it from the shift pin 5 and then rotating it, the position of the shift chuck 1 can be easily adjusted, thereby switching between the operating states of the first retaining ring 6 and the second retaining ring 11. This design enables the circlip pliers to flexibly perform internal or external clamping operations according to different operating requirements, greatly expanding its application range.

[0031] A fixed pin 9 is fixed to the rear side of the fixed handle 2. A rotatable L-shaped locking rod 4 is mounted on the fixed pin 9. The locking rod 4 is located to the right of the movable handle 3. Multiple sets of tooth grooves are formed on the side of the movable handle 3 near the locking rod 4. Micro-teeth 14 are formed on the end of the locking rod 4 that contacts the tooth grooves. The micro-teeth 14 mesh with the tooth grooves. By combining the fixed pin 9 and the rotatable L-shaped locking rod 4 provided on the rear side of the fixed handle 2 with the multiple sets of tooth grooves 13 on the movable handle 3, the circlip pliers achieve an opening locking function. The micro-teeth 14 at one end of the locking rod 4 mesh with the tooth grooves 13, ensuring a stable connection between the movable handle 3 and the locking rod 4, ensuring stable locking and preventing accidental opening. This design solves the problem that existing circlip pliers often have a single function and lack a flexible opening locking mechanism, which can lead to accidental opening due to external forces during use, affecting operational effectiveness and efficiency. At the same time, most circlip pliers only support a single internal or external locking function, which cannot be quickly switched according to actual needs, limiting their scope of application.

[0032] In this embodiment, a torsion spring is provided at the connection between the locking lever 4 and the fixing pin 9, with one end of the torsion spring fixedly connected to the locking lever 4 and the other end fixedly connected to the fixing pin 9. The provision of the torsion spring ensures that the locking lever 4 always has a tendency to move toward the tooth groove 13, ensuring that the micro-teeth 14 on the locking lever 4 are always connected to the tooth groove 13, thereby ensuring the locking effect. At the same time, the locking lever 4 can automatically return to its original position when no external force is applied, making it easier to use the next time, thereby improving user convenience.

[0033] In this embodiment, the surface where the tooth grooves are located on the movable handle 3 is an arc surface, and multiple groups of tooth grooves are evenly arranged along the arc surface. The arc-shaped tooth grooves 13 can always contact the locking rod 4 when the movable handle 3 rotates, ensuring the locking effect of the locking rod 4.

[0034] In this embodiment, the first circlip head 6 and the second circlip head 11 are positioned correspondingly and are both located on the vertical center plane of the fixed handle 2. This design allows the first circlip head 6 and the second circlip head 11 to align with the holes on the external circlip and the internal circlip when in use, thereby clamping and fixing the external circlip and the internal circlip.

[0035] In this embodiment, the lower halves of both the fixed handle 2 and the movable handle 3 are covered with plastic grips (not shown). These soft, non-slip grips provide a more comfortable grip and can effectively reduce hand fatigue and discomfort during prolonged use of the circlip pliers. They also increase friction between the handles and the hand, preventing slippage during use.

[0036] The working principle of this circlip pliers with open locking and inside-outside clamping conversion function:

[0037] During use, the user first adjusts the position of the conversion chuck 1 on the shift pin 5 through the shift adjustment slot 7 according to needs to realize the conversion of the internal and external card functions. Make sure that the opening amount of the conversion chuck 1 and the fixed handle 2 is moderate to facilitate the installation and removal of the retaining spring. In this process, first pull the conversion chuck 1 outward so that the shift adjustment slot 7 on it disengages from the front end of the shift pin 5, then rotate the conversion chuck 1, turn it to the appropriate position and release it. Since the conversion chuck 1 is connected to the shift pin 5 through the connecting rod 16, under the reverse elastic force of the tension spring 17, the conversion chuck 1 is pulled to move in the opposite direction of the shift pin 5, so that the shift adjustment slot 7 on the conversion chuck 1 is clamped on the shift pin 5, realizing a stable connection between the conversion chuck 1 and the shift pin 5, and ensuring the stability of the conversion chuck 1;

[0038] Then, align the jaws of the circlip pliers with the circlip and firmly squeeze the movable handle 3, causing the first circlip head 6 and the second circlip head 11 to clamp the circlip. During this process, the movable handle 3 rotates, and the micro-teeth 14 on the locking lever 4 automatically engage with the tooth grooves 13 on the movable handle 3. After releasing the movable handle 3, the movable handle 3 will not automatically open, thus locking the opening without continuously applying pressure on the movable handle 3. The circlip is then installed. Once in place, press the lower end of the locking lever 4, which rotates along the fixing pin 9, separating the micro-teeth 14 on its upper end from the tooth grooves 13. The handle automatically opens, locking the circlip into place.

[0039] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not limitations on the implementation methods of the present invention. For ordinary technicians in the relevant field, other different forms of changes or modifications can be made based on the above description. It is impossible to list all the implementation methods here. Any obvious changes or modifications derived from the technical solution of the present invention are still within the scope of protection of the present invention.

Claims

1. A circlip pliers with an open locking and internal and external clamping switching function, comprising a fixed handle (2) and a movable handle (3), characterized in that: A positioning groove (8) of a special structure is provided inside the fixed handle (2) near the upper end, and a shift pin (5) adapted thereto is assembled inside the positioning groove (8). A rotating pin (10) of an integrated structure is fixedly provided at the rear end of the shift pin (5), and a movable handle (3) is rotatably connected to the rotating pin (10). A second retaining spring head (11) is fixedly provided at the upper end of the movable handle (3). A conversion clamp (1) is installed on the shift pin (5) on the front side of the fixed handle (2), and a first retaining spring head (6) of the same specification as the second retaining spring head (11) is fixedly provided at the upper end of the conversion clamp (1); A shift adjustment groove (7) adapted to the shift pin (5) is provided on one side of the conversion chuck (1) that is fitted to the fixed handle (2); the conversion chuck (1) is sleeved on the front end of the shift pin (5) through the shift adjustment groove (7); a through groove (18) is provided inside the shift pin (5); the front end of the through groove (18) is blocked by a limiting ring (15); a connecting rod (16) is provided inside the through groove (18); the front end of the connecting rod (16) passes through the limiting ring (15) and is fixedly connected to the bottom of the shift adjustment groove (7); a baffle (19) is fixedly provided at the rear end of the connecting rod (16); a tension spring (17) is sleeved on the connecting rod (16) between the baffle (19) and the limiting ring (15); A fixing pin (9) is fixedly provided on the rear side of the fixed handle (2), and a rotatable L-shaped locking rod (4) is sleeved on the fixing pin (9), and the locking rod (4) is located on the right side of the movable handle (3). A plurality of groups of tooth grooves are provided on the side of the movable handle (3) close to the locking rod (4), and a micro-tooth (14) is provided on one end of the locking rod (4) that is in contact with the tooth groove, and the micro-tooth (14) is meshed with the tooth groove.

2. The circlip pliers with the functions of opening locking and switching between inside and outside clamping according to claim 1, characterized in that: A torsion spring is provided at the connection between the locking rod (4) and the fixing pin (9), and one end of the torsion spring is fixedly connected to the locking rod (4), and the other end is fixedly connected to the fixing pin (9).

3. The circlip pliers with the functions of opening locking and switching between inside and outside clamping according to claim 1, characterized in that: The surface on which the tooth grooves are located on the movable handle (3) is an arc-shaped surface, and multiple groups of the tooth grooves are evenly arranged along the arc-shaped surface.

4. The circlip pliers with the functions of opening locking and switching between inside and outside clamping according to claim 1, characterized in that: The first retaining spring head (6) and the second retaining spring head (11) are positioned correspondingly, and are both located on the vertical center plane of the fixed handle (2).

5. The circlip pliers with the functions of opening locking and switching between inside and outside clamping according to claim 1, characterized in that: The lower halves of the fixed handle (2) and the movable handle (3) are both covered with plastic grips.

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