Snap spring pliers with opening locking and inside and outside clamping switching functions

Abstract

The invention relates to the technical field of manual hardware tools, in particular to a pair of snap spring pliers with opening locking and internal and external clamping conversion functions, which comprises a fixed handle, a positioning groove with a special-shaped structure is formed in the position, close to the upper end, of the fixed handle, and a gear shifting pin matched with the positioning groove is assembled in the positioning groove; a detachable conversion chuck is mounted on the gear shifting pin on the front side of the fixed handle; a gear shifting adjusting groove matched with the gear shifting pin is formed in the side, attached to the fixed handle, of the conversion clamping head, the conversion clamping head is arranged at the front end of the gear shifting pin in a sleeved mode through the gear shifting adjusting groove, a through groove is formed in the gear shifting pin, a connecting rod is arranged in the through groove, a blocking piece is fixedly arranged at the right end of the connecting rod, and a tension spring is arranged on the portion, between the blocking piece and the limiting ring, of the connecting rod in a sleeved mode. The clamp spring mounting and dismounting device is convenient to operate, diversified in function and suitable for clamp spring mounting and dismounting work in various working environments, through the innovative structural design, stability and multifunctionality in the operation process are achieved, and the working efficiency and user experience are greatly improved.

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 a special tool used to install and remove circlips (also called retaining rings or snap rings). Circlips are a fastener that is installed in the shaft groove or hole groove of a component to restrict the axial movement of the component. Circlip pliers are a tool specifically used to install and remove circlips. They are needle-nosed pliers in appearance, and the pliers head can be straight inside, straight outside, curved inside, curved outside, etc. Circlip pliers are mainly divided into two categories: external circlip pliers and internal circlip pliers. External circlip pliers are also called shaft circlip pliers, which are used to disassemble and install circlips outside the shaft; internal circlip pliers are also called hole circlip pliers, which are used to disassemble and install circlips inside the hole.

[0003] At present, the circlip pliers on the market often have a single function and lack a flexible opening locking mechanism, which makes them easy to open accidentally due to external forces during use, affecting the operation effect and work efficiency. At the same time, most circlip pliers only support a single internal or external clamping function and cannot be quickly switched according to actual needs, limiting their application scope. Therefore, it is particularly important to develop a circlip pliers that can both safely lock the opening and realize the rapid conversion of internal and external clamping functions. Summary of the invention

[0004] In view of the existing deficiencies, the present invention provides a circlip pliers with open locking and inside-outside clamp 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: 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-shaped structure is provided inside the fixed handle near the upper end, a shift pin adapted thereto is mounted inside the positioning groove, a rotating pin of an integrated 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 clamp is installed on the shift pin at the front side of the fixed handle, and a first circlip head with the same specification as the second circlip head is fixedly provided at the upper end of the switching clamp; A shift adjustment groove matched with the shift pin is provided on one side of the conversion chuck that fits 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, the left end of the through groove is blocked by a limiting ring, a connecting rod is provided inside the through groove, and the left end of the connecting rod passes through the limiting ring and is fixedly connected to the bottom of the shift adjustment 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; 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. A plurality of sets 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 meshed with the tooth groove.

[0006] 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.

[0007] Furthermore, the surface on which the tooth grooves are located on the movable handle is an arc-shaped surface, and a plurality of groups of the tooth grooves are evenly arranged along the arc-shaped surface.

[0008] Furthermore, the first spring head and the second spring head correspond in position and are both located on the vertical center plane of the fixed handle.

[0009] Furthermore, the lower parts of the fixed handle and the movable handle are both covered with plastic grips (not shown in the figure).

[0010] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention realizes the opening locking function of the circlip pliers by means of a fixed pin and a rotatable L-shaped locking rod arranged on the rear side of the fixed handle, in cooperation with a plurality of groups of tooth grooves on the movable handle, thereby effectively preventing the circlip pliers from accidentally opening due to external force during operation and ensuring stability during operation.

[0011] 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, and the position can be switched left and right on the fixed handle, thereby adjusting the opening amount of the conversion clamp and the fixed handle to achieve the conversion between the external clamp and the internal clamp function. The internal and external clamp 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 a variety of working environments.

[0012] 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

[0013] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0014] Figure 2 It is a structural schematic diagram from another angle of the present invention.

[0015] Figure 3 It is a schematic diagram of the disassembled structure of the present invention.

[0016] Figure 4 It is a schematic diagram of the structure of the shift leg in the present invention.

[0017] Figure 5 It is a schematic diagram of the structure of the fixed legs in the present invention.

[0018] Figure 6 It is a schematic structural diagram of the shift pin in the present invention.

[0019] Figure 7 It is a schematic diagram of the structure of the movable legs in the present invention.

[0020] Figure 8 It is a schematic diagram of the structure of the locking rod in the present invention.

[0021] Fig. 9 It is a cross-sectional view of the shift leg and the shift pin in the present invention.

[0022] In the figure: 1. conversion clamp 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-tooth; 15. limiting ring; 16. connecting rod; 17. tension spring; 18. through groove; 19. blocking piece. DETAILED DESCRIPTION

[0023] 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 described embodiments 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 work are within the scope of protection of the present invention.

[0024] Example: 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 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 the movable handle 3 is rotatably connected to the rotating pin 10. A second circlip 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 circlip head 6 with the same specification as the second circlip head 11 is fixedly provided at the upper end of the conversion clamp 1.

[0025] A shift adjustment groove 7 adapted to the shift pin 5 is provided on one side of the conversion chuck 1 that fits 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 left end of the through groove 18 is blocked by a limit ring 15. A connecting rod 16 is provided inside the through groove 18. The left end of the connecting rod 16 passes through the limit ring 15 and is fixedly connected to the bottom of the shift adjustment groove 7. A baffle 19 is fixed on the right end of the connecting rod 16. A tension spring 17 is sleeved on the connecting rod 16 between the baffle 19 and the limit ring 15. The circlip pliers realize the rapid switching of the internal and external card functions through the ingenious design of the shift pin 5 and the conversion chuck 1. The shift adjustment groove 7 provided inside the conversion chuck 1 is adapted to the shift pin 5. By pulling the conversion chuck 1 outward to separate it from the shift pin 5, and then rotating the conversion chuck 1, the position of the conversion chuck 1 can be easily adjusted, thereby switching the working states of the first circlip head 6 and the second circlip head 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.

[0026] A fixing pin 9 is fixed 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. Multiple sets 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 at one end of the locking rod 4 that is in contact with the tooth grooves, and the micro-tooth 14 is meshed and connected with the tooth grooves. The opening locking function of the circlip pliers is realized by the fixing pin 9 and the rotatable L-shaped locking rod 4 set on the rear side of the fixed handle 2, in conjunction with the multiple sets of tooth grooves 13 on the movable handle 3, and the micro-tooth 14 at one end of the locking rod 4 is meshed and connected with the tooth grooves 13, ensuring that the movable handle 3 can be stably connected with the locking rod 4, ensuring stable locking, and preventing accidental opening. This design solves the problem that the existing circlip pliers often have a single function and lack a flexible opening locking mechanism, which leads to accidental opening due to external force during use, affecting the operating effect and work efficiency. At the same time, most circlip pliers only support a single internal or external card function, and cannot be quickly switched according to actual needs, limiting the scope of their application.

[0027] In this embodiment, 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. The provision of the torsion spring enables the locking rod 4 to always have a tendency to move toward the tooth groove 13, ensuring that the micro-teeth 14 on the locking rod 4 can always be connected to the tooth groove 13, ensuring the locking effect, and at the same time enabling the locking rod 4 to automatically reset when not acted upon by external force, facilitating the next use, thereby improving the convenience of use.

[0028] 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 with the locking rod 4 when the movable handle 3 rotates, ensuring the locking effect of the locking rod 4.

[0029] In this embodiment, the first spring head 6 and the second spring head 11 correspond to each other and are both located on the vertical center plane of the fixed handle 2. This design enables the first spring head 6 and the second spring head 11 to align with the holes on the external spring and the internal spring when in use, thereby clamping and fixing the external spring and the internal spring.

[0030] In this embodiment, the lower parts of the fixed handle 2 and the movable handle 3 are both covered with plastic grips (not shown in the figure). The plastic grips are soft and non-slip, and can provide users with a more comfortable grip. When using the circlip pliers for a long time, the plastic grips can effectively reduce hand fatigue and discomfort. At the same time, the plastic grips can increase the friction between the handle and the hand to prevent slipping during use.

[0031] The working principle of this circlip pliers with open locking and inside-outside card conversion function: 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 achieve the conversion of the internal and external card functions. Ensure 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, and then rotate the conversion chuck 1 to the appropriate position and then 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, achieving a stable connection between the conversion chuck 1 and the shift pin 5, and ensuring the stability of the conversion chuck 1; Then align the jaws of the circlip pliers with the circlip, and squeeze the movable handle 3 with force, so that the first circlip head 6 and the second circlip head 11 clamp the circlip. During this process, the movable handle 3 rotates, and the micro-teeth 14 on the locking rod 4 automatically engage with the tooth grooves 13 on the movable handle 3. After the movable handle 3 is released, the movable handle 3 will not open automatically, thereby achieving the locking of the opening, and there is no need to continuously apply force to press the movable handle 3. Then install the circlip, and after it is installed in place, press the lower end of the locking rod 4, the locking rod 4 rotates along the fixing pin 9, and the micro-teeth 14 on its upper end separate from the tooth grooves 13, and the handle automatically opens, so that the circlip is locked in place.

[0032] 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 on the basis of the above description. It is impossible to list all the implementation methods here. All obvious changes or modifications derived from the technical solution of the present invention are still within the protection scope of the present invention.

Claims

1. A circlip pliers with the functions of opening locking and switching between inside and outside clamping, 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, a shift pin (5) adapted thereto is mounted 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), 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 head (1) is installed on the shift pin (5) at the front side of the fixed handle (2), 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 head (1); A shift adjustment groove (7) adapted to the shift pin (5) is provided on one side of the conversion chuck (1) that is in contact with 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 left end of the through groove (18) is blocked by a limit ring (15); a connecting rod (16) is provided inside the through groove (18); the left end of the connecting rod (16) passes through the limit ring (15) and is fixedly connected to the bottom of the shift adjustment groove (7); a baffle (19) is fixedly provided at the right end of the connecting rod (16); a tension spring (17) is sleeved on the connecting rod (16) between the baffle (19) and the limit ring (15); A fixing pin (9) is fixedly provided on the rear side of the fixed handle (2); a rotatable L-shaped locking rod (4) is sleeved on the fixing pin (9); 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); a micro-tooth (14) is provided at one end of the locking rod (4) that is in contact with the tooth groove; 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 the plurality of groups of 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 located in corresponding positions 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 parts of the fixed handle (2) and the movable handle (3) are both covered with plastic grips.

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