Multi-gear adjustable locking pliers

Abstract

The utility model relates to the technical field of manual tools, in particular to a multi-gear adjustable lock wrench which comprises a fixed handle, a movable handle is assembled on the lower side of the fixed handle, and a multi-gear adjustable wrench head is arranged on the left side of the fixed handle and the left side of the movable handle. The clamp head is composed of two clamping units, one clamping unit is connected with the fixed handle through a connecting plate, and the other clamping unit is connected with the movable handle through a connecting plate. The clamping unit comprises a first-stage clamp body, a second-stage clamp body and a third-stage clamp body, the third-stage clamp body is fixedly connected with the connecting plate, the second-stage clamp body is movably connected to the left side of the third-stage clamp body, the first-stage clamp body is movably connected to the left side of the second-stage clamp body, and the first-stage clamp body and the second-stage clamp body are both of an L-shaped structure. Through the design of the multi-gear adjustable plier head, a user can easily adjust the length of the plier head according to actual requirements, so that the plier head can adapt to parts with different sizes and shapes, the flexibility and adaptability of the locking pliers are greatly improved, and diversified use requirements are met.

Description

Technical Field

[0001] The utility model relates to the technical field of hand tools, in particular to a pair of multi-position adjustable locking pliers. Background Art

[0002] Locking pliers are a type of hand tool, mainly used for clamping parts for riveting, welding, grinding and other processing. Its characteristics are that the jaws can be locked and generate a large clamping force to prevent the clamped parts from loosening. The jaws have many adjustment positions for clamping parts of different thicknesses. They can also be used as wrenches.

[0003] As a commonly used clamping tool, locking pliers are widely used in various fields, including machining, automotive repair, and construction installation. However, existing locking pliers have fixed jaw lengths and cannot be adjusted to meet actual needs. This limits their scope of use and flexibility. This is particularly true when handling parts of varying sizes and shapes, where fixed-length locking pliers often fail to meet clamping requirements, impacting work efficiency and quality.

[0004] Therefore, there is an urgent need for a locking pliers that can easily and quickly adjust the length of the pliers head according to use requirements. Utility Model Content

[0005] In response to the existing deficiencies, the present invention provides a multi-position adjustable locking pliers, which solves the problems raised in the above-mentioned background technology. The present invention can conveniently and quickly adjust the length of the pliers head according to usage requirements to adapt to different working scenarios and part sizes, thereby improving work efficiency and operational flexibility.

[0006] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0007] A multi-position adjustable locking pliers, comprising a pliers head and a fixed handle, a movable handle being mounted on the lower side of the fixed handle, an adjusting screw being mounted inside the right end of the fixed handle, a quick-release handle being mounted inside the movable handle, a multi-position adjustable pliers head being mounted on the left side of the fixed handle and the movable handle, and the pliers head being connected to the fixed handle and the movable handle via a connecting plate;

[0008] The pliers head is composed of two groups of clamping units, one group of clamping units is connected to the fixed handle through a connecting plate, and the other group of clamping units is connected to the movable handle through a connecting plate;

[0009] The clamping unit includes a first-level clamp body, a second-level clamp body, a third-level clamp body, a limiting slide, a limiting slide plate, a positioning groove, a support spring and a locking block. The third-level clamp body is fixedly connected to the connecting plate, and the left side of the third-level clamp body is movably connected to the second-level clamp body, and the left side of the second-level clamp body is movably connected to the first-level clamp body. The first-level clamp body position and the second-level clamp body are both configured as L-shaped structures, and the first-level clamp body position and the inner top of the second-level clamp body are fixedly provided with a T-shaped limiting slide plate, and the tops of the second-level clamp body and the third-level clamp body are both provided with limiting slide grooves adapted to the limiting slide plate, and the limiting slide plate is stuck in the limiting slide groove and is slidably connected to it, and the bottom of the limiting slide groove is evenly provided with multiple groups of positioning grooves with arc structures, and the right sides of the first-level clamp body and the second-level clamp body are embedded with support springs, and the lower side of the support spring is equipped with a locking block adapted to the positioning groove.

[0010] Furthermore, a jaw plate is fixedly provided on the lower end surfaces of the first-stage jaw body, the second-stage jaw body and the third-stage jaw body, and the width of the jaw plate is greater than the width of the first-stage jaw body, the second-stage jaw body and the third-stage jaw body.

[0011] Furthermore, the lower surface of the jaw plate is configured as a tooth-like structure.

[0012] Furthermore, connecting pieces with staggered heights are fixedly provided on the front and rear sides of the first-stage caliper body, the second-stage caliper body and the third-stage caliper body, and a clamping block is fixedly provided on the right side of the bottom surface of the connecting piece on the first-stage caliper body and the second-stage caliper body, and a clamping slot adapted to the clamping block is opened inside the connecting piece on the second-stage caliper body and the third-stage caliper body, and the clamping block is inserted into the clamping slot and slidably connected thereto.

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

[0014] 1. Improve flexibility: Through multi-gear adjustment, users can easily adjust the length of the pliers head to adapt to parts of different sizes and shapes, improving operational flexibility.

[0015] 2. Improve work efficiency: The adjustability of the pliers head length allows users to meet different work needs without having to replace pliers of different specifications, thereby improving work efficiency.

[0016] 3. Enhanced applicability: The multi-speed adjustment pliers of the utility model are suitable for a variety of working scenarios and part sizes, and have strong versatility and applicability. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0018] Figure 2 It is a front view of the utility model.

[0019] Figure 3It is a schematic diagram of the unfolded structure of the pliers head in the present utility model.

[0020] Figure 4 It is a structural schematic diagram of the clamping unit in the utility model.

[0021] Figure 5 This is a schematic diagram of the disassembled structure of the clamping unit in the present invention.

[0022] Figure 6 It is a cross-sectional view of the clamping unit in the present invention.

[0023] Figure 7 for Figure 6 A magnified schematic diagram of the structure at point A in the middle.

[0024] In the figure: 1. Clamp head; 11. Clamping unit; 111. First-stage clamp body; 112. Second-stage clamp body; 113. Third-stage clamp body; 114. Jaw plate; 115. Limiting slide; 116. Connecting piece; 117. Limiting slide; 118. Clamping block; 119. Clamping slot; 1110. Positioning groove; 1111. Support spring; 1112. Locking block; 2. Fixed handle; 3. Movable handle; 4. Quick-release handle; 5. Adjusting screw; 6. Connecting plate. DETAILED DESCRIPTION

[0025] 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.

[0026] Example:

[0027] like Figures 1 to 7 As shown, a multi-position adjustable locking pliers includes a pliers head 1 and a fixed handle 2, a movable handle 3 is assembled on the lower side of the fixed handle 2, an adjusting screw 5 is assembled inside the right end of the fixed handle 2, and a quick release handle 4 is assembled inside the movable handle 3. A multi-position adjustable pliers head 1 is arranged on the left side of the fixed handle 2 and the movable handle 3, and the pliers head 1 is connected to the fixed handle 2 and the movable handle 3 through a connecting plate 6;

[0028] The pliers head 1 is composed of two groups of clamping units 11, one group of clamping units 11 is connected to the fixed handle 2 through the connecting plate 6, and the other group of clamping units 11 is connected to the movable handle 3 through the connecting plate 6;

[0029] The clamping unit 11 includes a primary clamp body 111, a secondary clamp body 112, a tertiary clamp body 113, a limiting slide 115, a limiting slide plate 117, a positioning groove 1110, a support spring 1111 and a locking block 1112. The tertiary clamp body 113 is fixedly connected to the connecting plate 6. The left side of the tertiary clamp body 113 is movably connected to the secondary clamp body 112. The left side of the secondary clamp body 112 is movably connected to the primary clamp body 111. The primary clamp body 111 and the secondary clamp body 112 are both L-shaped structures. The top of the primary clamp body 111 and the secondary clamp body 112 are fixed with a T-shaped limiting slide plate 117. The top of the secondary clamp body 112 and the tertiary clamp body 113 are both provided with a suitable limit slide plate 117. The limiting slide 115 is equipped with a limiting slide 115, and the limiting slide plate 117 is stuck in the limiting slide 115 and is slidably connected to it. A plurality of arc-shaped positioning grooves 1110 are evenly arranged at the bottom of the limiting slide 115. The right side of the first-level clamp body 111 and the second-level clamp body 112 are embedded with a supporting spring 1111. The lower side of the supporting spring 1111 is equipped with a locking block 1112 that is compatible with the positioning groove 1110. This design solves the problem that the length of the existing pliers head 1 is fixed and cannot be adjusted according to actual needs, which limits its scope of use and flexibility. When processing parts of different sizes and shapes, pliers with fixed lengths often cannot meet the clamping requirements, affecting work efficiency and work quality.

[0030] In this embodiment, jaw plates 114 are fixed to the lower end surfaces of the first, second, and third jaw bodies 111, 112, 113. The width of the jaw plates 114 is greater than the widths of the first, second, and third jaw bodies 111, 112, 113. This design increases the contact area between the jaw plates 114 and the parts, helping to disperse the clamping force and reduce the pressure at the stress points of the parts, thereby preventing damage to the parts due to excessive local pressure. At the same time, the larger area of ​​the jaw plates 114 provides a more stable clamping effect, helping to prevent the parts from slipping or falling off during the clamping process, thereby ensuring the safety and accuracy of the operation.

[0031] In this embodiment, the lower surface of the jaw plate 114 is set to a tooth-like structure, which can significantly increase the contact area between the jaw plate 114 and the part, thereby enhancing friction, helping to prevent the part from sliding or falling off during the clamping process and ensuring the stability of the clamping.

[0032] In this embodiment, connecting pieces 116 are fixedly provided on the front and rear sides of the first, second, and third calipers 111, 112, and 113, respectively, at different heights. A clamping block 118 is fixedly provided on the right side of the bottom surface of the connecting piece 116 on the first and second calipers 111, 112, respectively. A slot 119 is provided within the connecting piece 116 on the second and third calipers 112, 113, that matches the clamping block 118. The clamping block 118 is inserted into the slot 119 and slidably connected thereto. This design, through the provision of the connecting piece 116, enhances the connection stability between the calipers, ensuring that the calipers do not deviate or shake during telescopic movement, thereby ensuring the stability and safety of the calipers during the clamping process.

[0033] The working principle of this multi-position adjustable locking pliers is as follows: in actual use, when the clamping distance of the pliers head 1 needs to be extended, the user pinches the first and second pliers bodies 111, 112 on the pliers head 1 and pulls them outward, causing the locking block 1112 to disengage from the current positioning groove 1110 and slide into the next positioning groove 1110, thereby achieving multi-position adjustment of the length of the pliers head 1. The first, second, and third pliers bodies 111, 112, and 113 are slidably connected by the cooperation of the limiting slide 117 and the limiting groove 115. At the same time, the design of the positioning groove 1110 and the locking block 1112 ensures that the pliers bodies remain stable during the extension and retraction process. The design of the connecting piece 116 enhances the connection stability between the pliers bodies, ensuring that the pliers bodies do not deviate or shake during extension and retraction. The cooperation of the clamping block 118 and the clamping groove 119 makes the connection between the pliers bodies tighter and more reliable, ensuring the safety and stability of the pliers bodies during the clamping process.

[0034] 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. All 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 multi-position adjustable locking pliers, comprising a pliers head (1) and a fixed handle (2), characterized in that: A movable handle (3) is mounted on the lower side of the fixed handle (2), an adjusting screw (5) is mounted inside the right end of the fixed handle (2), a quick-release handle (4) is mounted inside the movable handle (3), and a multi-position adjustable pliers head (1) is mounted on the left side of the fixed handle (2) and the movable handle (3), and the pliers head (1) is connected to the fixed handle (2) and the movable handle (3) via a connecting plate (6); The pliers head (1) is composed of two groups of clamping units (11), one group of the clamping units (11) is connected to the fixed handle (2) via a connecting plate (6), and the other group of the clamping units (11) is connected to the movable handle (3) via a connecting plate (6); The clamping unit (11) comprises a primary clamp body (111), a secondary clamp body (112), a tertiary clamp body (113), a limiting slide groove (115), a limiting slide plate (117), a positioning groove (1110), a support spring (1111) and a locking block (1112); the tertiary clamp body (113) is fixedly connected to the connecting plate (6); the left side of the tertiary clamp body (113) is movably connected to the secondary clamp body (112); the left side of the secondary clamp body (112) is movably connected to the primary clamp body (111); the primary clamp body (111) and the secondary clamp body (112) are both configured as L-shaped structures; the primary clamp body (111) and the secondary clamp body (112) are ... tertiary clamp body (113) is movably connected to the primary clamp body (111); the left side of the tertiary clamp body (113) is movably connected to the primary clamp body (111); the left side of the tertiary clamp body (113) is movably connected to the primary clamp body (111); the left side of the tertiary clamp body (113) is movably connected to the primary clamp body (111); the left side of the tertiary clamp body (11 ) are fixedly provided with a T-shaped limiting slide plate (117) on the top of the inner side, and the tops of the secondary clamp body (112) and the tertiary clamp body (113) are provided with limiting slide grooves (115) adapted to the limiting slide plate (117), and the limiting slide plate (117) is inserted into the limiting slide groove (115) and slidably connected thereto, and the bottom of the limiting slide groove (115) is evenly provided with multiple groups of arc-shaped positioning grooves (1110), and the right sides of the first clamp body (111) and the second clamp body (112) are embedded with support springs (1111), and the lower side of the support spring (1111) is equipped with a locking block (1112) adapted to the positioning groove (1110).

2. The multi-position adjustable locking pliers according to claim 1, characterized in that: A jaw plate (114) is fixedly provided on the lower end surfaces of the first-stage jaw body (111), the second-stage jaw body (112), and the third-stage jaw body (113), and the width of the jaw plate (114) is greater than the width of the first-stage jaw body (111), the second-stage jaw body (112), and the third-stage jaw body (113).

3. The multi-position adjustable locking pliers according to claim 2, characterized in that: The lower surface of the jaw plate (114) is configured as a tooth-like structure.

4. The multi-position adjustable locking pliers according to claim 1, characterized in that: Connecting pieces (116) with staggered heights are fixedly provided on the front and rear sides of the first-stage clamp body (111), the second-stage clamp body (112), and the third-stage clamp body (113). A clamping block (118) is fixedly provided on the right side of the bottom surface of the connecting piece (116) on the first-stage clamp body (111) and the second-stage clamp body (112). A clamping groove (119) adapted to the clamping block (118) is provided inside the connecting piece (116) on the second-stage clamp body (112) and the third-stage clamp body (113). The clamping block (118) is clamped into the clamping groove (119) and slidably connected thereto.

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