Automatic adjustment opening wrench with locking function

Abstract

The utility model relates to manual hardware tool technical field, especially a kind of automatic adjustment opening's pincer spanner with locking function is provided.The handle of fixed pincer body is equipped with self-adjusting mechanism, and self-adjusting mechanism includes slide bar installed in fixed pincer body, and spring is sleeved on slide bar;The lower end of sliding jaw is equipped with protrusion, and protrusion is connected with the front end of movable handle by rivet A, and locking mechanism is equipped between movable handle and self-adjusting mechanism, and locking mechanism includes cam link, and one end of cam link is connected with movable handle by rivet B, and the other end of cam link is connected with one end of cam by pivot, and the other end of cam is connected with lock block by rivet C, and lock block is slidably installed on slide bar and abuts with the front end of spring.Both can rotate workpiece and lock workpiece, locking force is big, self-locking is stable, effectively avoids skidding phenomenon;When clamping workpiece of different sizes, opening amount can be automatically adjusted, reduce the time of operator to replace tool, improve work efficiency.

Description

Technical Field

[0001] This utility model relates to the field of manual hardware tools, and in particular to a pliers wrench with an automatic adjustable opening and locking function. Background Technology

[0002] Currently, commercially available pliers wrenches, as disclosed in patent application CN118848869A, include a fixed pliers body, a movable handle, and a wrench jaw. The wrench jaw is slidably mounted on the fixed pliers body. The head of the fixed pliers body has a groove, and one side wall of the groove has a ratchet groove. A ratchet wheel is located within the groove, and the ratchet wheel is connected to the movable handle via a ratchet pin. The front end of the movable handle is rotatably connected to the wrench jaw. This type of pliers wrench has the following drawbacks in practical use: First, it can only tighten workpieces, not lock them in place. For example, when clamping workpieces during welding, other tools need to be used, which is cumbersome. Also, when a rusted nut requires significant tightening force, insufficient locking force can easily lead to slippage. Second, when clamping workpieces of different sizes, the opening needs frequent adjustment. Currently, this can only be done by sliding the ratchet wheel within the ratchet groove, which is slow, inefficient, inconvenient, time-consuming, and labor-intensive. There is currently no good solution to these problems.

[0003] In summary, how to simultaneously achieve locking and automatic opening adjustment functions in a pliers wrench has become a pressing technical challenge for the industry. Utility Model Content

[0004] To overcome the shortcomings of the prior art, this utility model provides an automatic adjustable plier wrench with a locking function, which solves the problem that the previous plier wrenches could only tighten the workpiece but could not lock it, and also solves the problems of slow opening adjustment speed and low efficiency of the previous plier wrenches.

[0005] The technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows: A pliers wrench with an automatic adjusting opening and locking function includes a fixed pliers body and a sliding jaw, which are slidably connected. The fixed pliers body handle has a self-adjusting mechanism, which includes a slide rod installed within the fixed pliers body, with a spring sleeved on the slide rod. The lower end of the sliding jaw has a protrusion connected to the front end of a movable handle via rivet A. A locking mechanism is provided between the movable handle and the self-adjusting mechanism, comprising a cam link. One end of the cam link is connected to the movable handle via rivet B, and the other end of the cam link is connected to one end of a cam via a rotating shaft. The other end of the cam is connected to a locking block via rivet C. The locking block is slidably mounted on the slide rod and abuts against the front end of the spring, while the rear end of the spring abuts against the rear end of the fixed pliers body.

[0006] The fixed clamp body has sliding grooves on both sides of the middle part, and the sliding jaws have bosses that cooperate with the sliding grooves. The bosses are slidably installed in the sliding grooves.

[0007] The fixed clamp handle is provided with a slide bar groove and a spring groove. The two ends of the slide bar are fixedly installed in the slide bar groove, and the spring is located in the spring groove.

[0008] The locking block has a U-shaped groove, which is fitted onto the slide rod. The cam is inserted into the opening of the U-shaped groove and connected to the locking block by rivets C.

[0009] The cam connecting rod is provided with a screw seat on one side of the cam connection end. An adjusting screw is installed in the screw seat with internal thread. The adjusting screw cooperates with the cam to adjust the locking force.

[0010] The movable handle is connected to the front end of the unlocking handle by rivet D and torsion spring, and the side of the unlocking handle is provided with an unlocking protrusion.

[0011] The movable handle is provided with a limiting protrusion that cooperates with the unlocking handle.

[0012] The present invention adopts the above solution and has the following beneficial effects: By incorporating a self-adjusting mechanism at the fixed jaw handle and a locking mechanism between the movable handle and the self-adjusting mechanism, the tool achieves two key benefits: First, the locking mechanism provides a self-locking function and clamps the workpiece firmly, effectively locking it in place. It can both tighten and lock the workpiece, offering strong locking force and stable self-locking, effectively preventing slippage. The locking force can be adjusted using an adjusting screw. Second, the sliding jaws slide freely under the combined action of the locking and self-adjusting mechanisms, allowing for self-adaptation between the opening and the workpiece during clamping. It automatically adjusts the opening size when clamping workpieces of different dimensions, enabling multiple functions with a single tool, reducing operator time spent changing tools, and improving work efficiency. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of this utility model.

[0014] Figure 2 This is a schematic diagram of the open state of this utility model.

[0015] Figure 3 This is a schematic diagram of the structure of the fixing clamp body of this utility model.

[0016] Figure 4 This is a schematic diagram of the sliding jaw structure of this utility model.

[0017] In the diagram, 1. Fixed clamp body, 2. Sliding jaws, 3. Slide rod, 4. Spring, 5. Protrusion, 6. Rivet A, 7. Movable handle, 8. Cam connecting rod, 9. Rivet B, 10. Rotating shaft, 11. Cam, 12. Rivet C, 13. Locking block, 14. Slide groove, 15. Boss, 16. Slide rod groove, 17. Spring groove, 18. Screw seat, 19. Adjusting screw, 20. Rivet D, 21. Torsion spring, 22. Unlocking handle, 23. Unlocking protrusion, 24. Limiting protrusion. Detailed Implementation

[0018] To clearly illustrate the technical features of this solution, the present invention will be described in detail below through specific embodiments and in conjunction with the accompanying drawings.

[0019] like Figure 1-4 As shown, a pliers wrench with an automatic adjusting opening and locking function includes a fixed pliers body 1 and a sliding jaw 2, which are slidably connected. The fixed pliers body 1 has a self-adjusting mechanism at its handle, which includes a slide rod 3 installed inside the fixed pliers body 1, and a spring 4 sleeved on the slide rod 3. The lower end of the sliding jaw 2 has a protrusion 5, which is connected to the front end of a movable handle 7 by a rivet A6. The sliding jaw 2 clamps or releases the workpiece under the pushing and pulling forces of the movable handle 7. A locking mechanism is provided between the movable handle 7 and the self-adjusting mechanism, which includes a cam link 8. One end of the cam link 8 is connected to the movable handle 7 by a rivet B9, and the other end of the cam link 8 is connected to one end of a cam 11 by a rotating shaft 10. The other end of the cam 11 is connected to a locking block 13 by a rivet C12. The locking block 13 is slidably mounted on the slide rod 3 and abuts against the front end of the spring 4. The rear end of the spring 4 abuts against the rear end of the fixed pliers body 1.

[0020] The fixed clamp body 1 has sliding grooves 14 on both sides of the middle part, and the sliding jaw 2 has a boss 15 that cooperates with the sliding groove 14. The boss 15 is slidably installed in the sliding groove 14, so that the sliding jaw 2 moves along the sliding groove 14 on the fixed clamp body 1.

[0021] The handle of the fixed clamp body 1 is provided with a slide bar groove 16 and a spring groove 17. The two ends of the slide bar 3 are respectively fixedly installed in the slide bar groove 16, and the spring 4 is located in the spring groove 17.

[0022] The locking block 13 has a U-shaped groove, which is sleeved on the slide rod 3. The cam 11 is inserted into the opening of the U-shaped groove and connected to the locking block 13 by rivet C12.

[0023] A screw seat 18 is provided on one side of the connection end between the cam connecting rod 8 and the cam 11. An adjusting screw 19 is installed on the internal thread of the screw seat 18. The adjusting screw 19 cooperates with the cam 11 to adjust the locking force. When the front end of the adjusting screw 19 is closer to the cam 11, the rotation angle of the cam 11 is smaller, the movement distance of the locking block 13 driven by the cam 11 is smaller, and the locking force is smaller. Conversely, when the front end of the adjusting screw 19 is farther from the cam 11, the rotation angle of the cam 11 is larger, the movement distance of the locking block 13 driven by the cam 11 is larger, and the locking force is greater.

[0024] The movable handle 7 is connected to the front end of the unlocking handle 22 via rivet D20 and torsion spring 21. The side of the unlocking handle 22 is provided with an unlocking protrusion 23. When the unlocking handle 22 is pressed towards the fixed clamp body 1, the unlocking protrusion 23 will support the locking block 13 to rotate the movable handle 7 outward, thereby releasing the locking mechanism.

[0025] The movable handle 7 is provided with a limiting protrusion 24 that cooperates with the unlocking handle 22. The limiting protrusion 24 can restrict the unlocking handle 22 within the movable handle 7 and prevent the unlocking handle 22 from detaching from the movable handle 7 under the action of the torsion spring 21.

[0026] Working principle: In use, first open and pull down the movable handle 7. The movable handle 7, through the cam connecting rod 8 and the cam 11, drives the locking block 13 to compress the spring 4 and move it downward along the slide rod 3. At the same time, it drives the sliding jaw 2 to move downward, so that the opening between it and the fixed jaw 1 opens quickly. In the open state, rivets A6, B9, and C12 form a triangle. Then, place the workpiece between the openings and release the movable handle 7. The locking block 13 moves upward and resets under the action of the spring 4, and drives the cam 11, the cam connecting rod 8, the movable handle 7, and the sliding jaw 2 to move upward to initially clamp the workpiece. The mechanism automatically adjusts the opening size. Then, pressing the movable handle 7 towards the fixed clamp body 1 causes the cam connecting rod 8 to rotate, which in turn rotates the cam 11. The cam 11 then moves the locking block 13 downwards, compressing the spring 4. Simultaneously, the movable handle 7 pushes the sliding jaws 2 forward, gradually clamping the workpiece. Through the combined action of the locking mechanism and the self-adjusting mechanism, the opening and workpiece are automatically matched. When rivets A6, B9, and C12 gradually change from a triangle to a straight line, the sliding jaws 2 are locked in place, thus achieving workpiece clamping and locking. As the movable handle 7 moves, it also moves the unlocking handle 22 towards the fixed clamp body 1, compressing the torsion spring 21. To open, simply press the unlocking handle 22 towards the fixed clamp body 1. The unlocking protrusion 23 on the unlocking handle 22 supports the locking block 13, causing the movable handle 7 to rotate outwards. Simultaneously, the torsion spring 21 opens the movable handle 7, unlocking it.

[0027] The above specific embodiments should not be construed as limiting the scope of protection of this utility model. For those skilled in the art, any alternative improvements or modifications made to the embodiments of this utility model shall fall within the scope of protection of this utility model.

[0028] Any aspects of this utility model not described in detail are known to those skilled in the art.

Claims

1. A pliers wrench with an automatic adjusting opening and locking function, characterized in that: The device includes a fixed clamp body and a sliding jaw, which are slidably connected. A self-adjusting mechanism is provided at the handle of the fixed clamp body. The self-adjusting mechanism includes a slide rod installed within the fixed clamp body, on which a spring is sleeved. A protrusion is provided at the lower end of the sliding jaw, which is connected to the front end of a movable handle via rivet A. A locking mechanism is provided between the movable handle and the self-adjusting mechanism. The locking mechanism includes a cam link, one end of which is connected to the movable handle via rivet B, and the other end of which is connected to one end of a cam via a rotating shaft. The other end of the cam is connected to a locking block via rivet C. The locking block is slidably mounted on the slide rod and abuts against the front end of the spring, while the rear end of the spring abuts against the rear end of the fixed clamp body.

2. A pliers wrench with an automatic adjusting opening and locking function according to claim 1, characterized in that: The fixed clamp body has sliding grooves on both sides of the middle part, and the sliding jaws have bosses that cooperate with the sliding grooves. The bosses are slidably installed in the sliding grooves.

3. A pliers wrench with an automatic adjusting opening and locking function according to claim 1, characterized in that: The fixed clamp handle is provided with a slide bar groove and a spring groove. The two ends of the slide bar are fixedly installed in the slide bar groove, and the spring is located in the spring groove.

4. A pliers wrench with an automatic adjusting opening and locking function according to claim 1, characterized in that: The locking block has a U-shaped groove, which is fitted onto the slide rod. The cam is inserted into the opening of the U-shaped groove and connected to the locking block by rivets C.

5. A pliers wrench with an automatic adjusting opening and locking function according to claim 1, characterized in that: The cam connecting rod is provided with a screw seat on one side of the cam connection end. An adjusting screw is installed in the screw seat with internal thread. The adjusting screw cooperates with the cam to adjust the locking force.

6. A pliers wrench with an automatic adjusting opening and locking function according to claim 1, characterized in that: The movable handle is connected to the front end of the unlocking handle by rivet D and torsion spring, and the side of the unlocking handle is provided with an unlocking protrusion.

7. A pliers wrench with an automatic adjusting opening and locking function according to claim 6, characterized in that: The movable handle is provided with a limiting protrusion that cooperates with the unlocking handle.

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