CN201098850Y - self-adjusting pliers - Google Patents

Abstract

The utility model discloses a self-adjusting pliers, which comprises a fixed pliers head, a fixed handle, a movable pliers head, a movable handle, and an unlocking handle. The fixed pliers head is fixedly connected to the fixed handle, and one side of the movable pliers head is hinged to the fixed handle. , the other side is hinged with the movable handle; a slide bar is provided on the movable handle through the pin E, and an adjusting device is provided on the fixed handle; a cam lever is arranged on the adjusting device through a pin; the other end of the cam rod is provided through a pin A slider; the slider is sleeved on the slide rod; the slider is connected with the movable clamp head through a tension spring; the slider, the slider, the cam lever and the adjusting device form a length-adjustable rod. The utility model can automatically adjust the angle of the jaws according to the diameter of the pipe fittings, and can self-lock after the pipe fittings are clamped, and can be adjusted according to the requirements of the clamping force. It is a hardware tool commonly used in industrial and mining enterprises and machinery maintenance industries.

Description

self-adjusting pliers

technical field

The utility model relates to a hardware tool, in particular to a self-adjusting pliers for clamping pipe fittings.

Background technique

Pliers are a commonly used hardware tool, mainly used to clamp and rotate pipe fittings. It has the characteristics of large clamping force and convenient operation. The currently used pliers need to be adjusted according to the diameter of the pipe fittings before use, and the jaws should be adjusted to an angle suitable for the diameter of the pipe fittings. The angle of the jaws cannot be automatically adjusted according to the diameter of the pipe fittings; The adjustments are all in the same link. For thin-walled pipe fittings or parts with soft surfaces, it is easy to flatten the pipe fittings or damage the surface of the pipe fittings, which is inconvenient in use.

Contents of the invention

The purpose of this utility model is to provide a self-adjusting pliers, which can automatically adjust the angle of the jaws according to the diameter of the pipe, can be self-locked after clamping the pipe, and can be adjusted according to the requirements of the clamping force.

The purpose of this utility model is achieved through the following technical solutions:

A self-adjusting pliers, characterized in that it includes a fixed pliers head, a fixed handle, a movable pliers head, a movable handle, an unlocking handle, the fixed pliers head is fixedly connected to the fixed handle, and one side of the movable pliers head is connected to The fixed handle is hinged, and the other side is hinged with the movable handle through the pin F; the movable handle is provided with a slide bar through the pin E, and the fixed handle is provided with an adjustment device; the adjustment device is provided with a cam lever through the pin C; the cam lever The other end of the pin D is provided with a slide block; the slide block is sleeved on the slide rod; the slide block is connected with the movable clamp head through a tension spring; the slide bar, the slide block, the cam lever and the adjustment device constitute a length-adjustable rod; The unlocking handle is hinged with the movable handle through a torsion spring pin.

In the utility model, the adjustment device includes an adjustment seat and an adjustment screw, the adjustment seat is hinged on the fixed handle through the pin B, the adjustment screw used to adjust the position of the cam lever is installed on the adjustment seat, and one end of the adjustment screw is against the cam end of the rod.

In the utility model, the slide block is sleeved on the slide bar and can slide along the slide bar. The sliding bar, the sliding block, the cam lever and the adjusting device constitute a length-adjustable rod, and the length of the rod can be automatically adjusted according to the angle between the movable tong head and the fixed tong head. The rod together with the fixed handle, the movable pliers head and the movable handle form a double rocker mechanism.

When the pipe is not clamped and the movable clamp head is in a free state, the slider can slide freely along the slide rod, and the length of the rod composed of the slide rod, slider, cam lever and adjustment device can be adjusted according to the relative fixed clamp head of the movable clamp head. The angle between them is determined, which can be automatically adjusted according to the pipe diameter.

When the angle between the movable clamp head and the fixed clamp head is automatically determined according to the diameter of the pipe, the cam part on the cam rod is equivalent to a wedge, and the slider is fixed on the slide rod. The length of the rod formed by the adjustment device is determined accordingly, and at the same time, the three points of pin F, pin E and pin B are in a straight line, so that pin E is at the dead point in the double rocker mechanism, and the self-adjusting pliers are self-locking.

When the unlocking handle rotates toward the fixed handle with the torsion spring pin as the fulcrum, the pin E is separated from the dead point position of the double rocker mechanism, and the self-adjusting forceps releases the locked state.

Compared with the prior art, the utility model can automatically adjust the angle of the jaws according to the diameter of the pipe fittings, self-lock after the pipe fittings are clamped, and can be adjusted according to the requirements of the clamping force. Especially for thin-walled pipe fittings or parts with soft surfaces, it will not pinch flat pipe fittings or damage the surface of pipe fittings, and is easy to operate and easy to use.

Description of drawings

Fig. 1 is the structure schematic diagram of the utility model when there is no workpiece and the jaws are tight together;

Fig. 2 is the structural representation of the utility model when free state;

Fig. 3 is a schematic structural view of the utility model when the workpiece is clamped;

Fig. 4 is a structural schematic view of the utility model when the clamping is released.

Explanation of main symbols in the attached drawings:

1-Fixed pliers head 2-Pin A

3-extension spring 4-slider

5-fixed handle 6-pin B

7-Adjustment device 71-Adjustment seat

72-Adjustment screw 8-Active clamp head

9-Unlock handle 10-Pin C

11-Cam lever 12-Torsion spring pin

13-Pin D 14-Slider

15-Active handle 16-Pin E

17-pin F 18-workpiece

Detailed ways

Below in conjunction with accompanying drawing and embodiment describe the utility model in detail.

As shown in Figure 1, a self-adjusting forceps, the fixed pliers head 1 is fixed on the fixed handle 5, the movable pliers head 8 is hinged with the fixed handle 5 through the pin A, and is hinged with the movable handle 15 through the pin F at the same time. A slide bar 14 is provided via a pin E on the movable handle 15 . An adjustment device 7 is provided on the fixed handle 5, and the adjustment device 7 includes an adjustment seat 71 and an adjustment screw 72. The adjustment seat 71 is hinged on the fixed handle 5 through a pin B, and the adjustment screw 72 is installed on the adjustment seat 71. A cam lever 11 is provided through the pin C on the top, and one end of the adjusting screw 72 abuts against the end of the cam lever 11 and is used to adjust the position of the cam lever 11 . The other end of the cam lever 11 is provided with a slide block 4 through a pin D. The slide block 4 is sleeved on the slide rod 14; the slide block 4 is connected with the movable clamp head 8 through the extension spring 3. Unlocking handle 9 is hinged with movable handle 15 by torsion spring pin 12 .

Slide bar 14, slide block 4, cam lever 11 and adjusting device 7 constitute a length-adjustable rod, which together with fixed handle 5, movable pliers head 8 and movable handle 15 form a double rocker mechanism, and the fixed handle 5 is equivalent to the fixed frame of the double rocker mechanism; the movable handle 15 is equivalent to the connecting rod of the double rocker mechanism; The pins A and B are two hinges on the fixed frame, and the pins E and F are two hinges on the connecting rod.

The slide block 4 is sleeved on the slide bar 14. When there is no pipe, the movable clamp head 8 is in a free state, and the slide block 4 can slide freely along the slide bar 14, as shown in FIG. 2 .

After the angle between the movable pliers 8 relative to the fixed pliers 1 is automatically determined according to the diameter of the pipe, the cam part on the cam rod 11 is equivalent to a wedge, and the slider 4 is fixed on the slide bar 14, and the slide bar 14 , the slide block 4, the cam lever 11 and the length of the rod member formed by the adjusting device 7 are determined accordingly, and at the same time, the three points of the pin F, the pin E, and the pin B are in a straight line, so that the pin E is at the dead center position in the double rocker mechanism, The self-adjusting pliers are self-locking, as shown in Figure 3.

When the unlocking handle 9 rotates toward the fixed handle 1 with the torsion spring pin 12 as the fulcrum, the pin E is separated from the dead center position of the double rocker mechanism, and the self-adjusting forceps is released from the locked state, as shown in Figure 4.

The adjustment screw 72 on the adjustment seat 71 can be used to fine-tune the length of the bar member formed by the slide bar 14, the slide block 4, the cam lever 11 and the adjustment device 7, thereby changing the clamping degree of the workpiece clamped by the jaws.

The utility model can automatically adjust the angle of the jaws according to the diameter of the pipe fittings, can self-lock after clamping the pipe fittings, and can be adjusted according to the requirements of the clamping force, and is simple to operate and easy to use.

Claims (2)

1, a kind of self-regulation locking pliers, it is characterized in that: it comprises fixed pliers head (1), fixed handle (5), movable binding clip (8), flexible handle (15), release lever (9), fixed pliers head (1) is fixed on the fixed handle (5), one side of movable binding clip (8) is hinged with fixed handle (5) by pin A (2), and opposite side is hinged with flexible handle (15) by pin F (17); Upward be provided with slide bar (14) at flexible handle (15), on fixed handle (5), be provided with adjusting device (7) by pin E (16); Upward be provided with cam lever (11) in adjusting device (7) by pin C (10); The other end of cam lever (11) is provided with slide block (4) by pin D (13); Slide block (4) is enclosed within on the slide bar (14); Slide block (4) is connected with movable binding clip (8) by extension spring (3); Slide bar (14), slide block (4), cam lever (11) and adjusting device (7) constitute a length-adjustable rod member; Release lever (9) is hinged by torsion spring pin (12) and flexible handle (15).

2, self-regulation locking pliers according to claim 1, it is characterized in that: described adjusting device (7) comprises adjustment seat (71) and adjustment screw (72), adjustment seat (71) is hinged on the fixed handle (5) by pin B (6), is used for the adjustment screw (72) of adjustment cam bar (11) position to be installed on the adjustment seat (71).

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