CN201342650Y - Fast adjustable spanner with high torsion - Google Patents

Abstract

The fast adjustable wrench with large torque belongs to hardware tools. The speed of adjusting the fixed block of the existing adjustable wrench is slow and the torsion is small. The movable block that moves relative to the fixed block to adjust the distance from the fixed block and the rotatable adjustment roller installed on the front end of the handle, the adjustment roller and the movable block realize the adjustment of the roller through the cooperation of the screw teeth separately arranged on it. The adjustment and self-locking of the movable block is characterized in that: the number of helical teeth separately arranged on the adjusting roller and the movable block is at least 2. Speed up the speed of adjusting the movable block and increase the torsional force by increasing the number of helical teeth on the adjusting roller and the movable block; Adjusting the movement of the rollers, so as to ensure the reliable force of the movable block and the adjusting rollers during clamping.

Description

High torque fast adjustable wrench

technical field

The utility model belongs to hardware tools, in particular to an adjustable wrench.

Background technique

In the existing adjustable wrench, the adjusting roller and the movable block are provided with mutually matching spiral teeth to adjust the distance between the movable block and the fixed block by rolling the adjusting roller for clamping or loosening the workpiece. Both the spiral teeth on the movable block and the movable block are single-headed, that is, the number of the spiral teeth is at least 1, which causes the existing adjustable wrench to adjust the fixed block at a slow speed and bear little torsion.

Utility model content

The technical problem to be solved and the technical task proposed by the utility model are to overcome the defects of the existing adjustable wrench that the speed of adjusting the fixed block is slow and the torsion force is small, and provide a fast adjustable wrench with large torque. For this reason, the utility model adopts the following technical solutions:

High-torque quick adjustable wrench, including a handle, a fixed block located at the front end of the handle and integrated with the handle, a movable block installed on the front end of the handle that can move relative to the fixed block to adjust the distance from the fixed block, and a fixed block installed on the handle. The front end can rotate the adjustment roller, and the adjustment roller and the movable block realize the adjustment and self-locking of the adjustment roller to the movable block through the cooperation of the screw teeth separately arranged on it. The number of helical teeth on the top is at least 2.

The beneficial effect of the utility model is: by increasing the number of heads of the spiral teeth on the adjusting roller and the movable block, the speed of adjusting the movable block is accelerated and the torsion force is increased; further, the moving block is moved away from the fixed block by acting on the adjusting roller The spring exerting force in the direction to avoid the movement of the adjustment roller, so as to ensure the reliable force of the movable block and the adjustment roller during clamping.

Description of drawings

Fig. 1 is the structural representation of the utility model.

FIG. 2 is a top view of FIG. 1 .

Fig. 3 is a sectional view taken along line K-K in Fig. 2 .

FIG. 4 is a schematic diagram of another state of the structure shown in FIG. 3 .

Among the figure: 1-handle, 2-fixed block, 3-movable block, 4-adjusting roller, 51/52-spiral teeth, 6-pin shaft, 7-spring.

Detailed ways

Below in conjunction with accompanying drawing, the utility model is described in further detail.

As shown in Figure 1-4, the large torque quick adjustable wrench includes a handle 1, a fixed block 2 located at the front end of the handle 1 and connected with the handle 1 as a whole, and the front end installed on the handle 1 can move relative to the fixed block 2 to adjust the connection with the fixed block 2. The movable block 3 with the distance between the fixed blocks 2 and the rotatable adjustment roller 4 installed at the front end of the handle 1, the adjustment roller 4 and the movable block 3 realize the 4 pairs of activities of the adjustment roller 4 through the cooperation of the screw teeth 51 and 52 respectively arranged on it. The adjustment and self-locking of block 3, the head number of the screw teeth that are respectively located on the adjustment roller 4 and the movable block 3 is 2 (i.e. double-ended screw teeth).

As a further improvement and supplement to the above-mentioned technical solution, the utility model also includes the additional technical features of the following paragraphs, so that they can be applied to the above-mentioned technical solution individually or in any combination when implementing the above-mentioned technical solution:

The adjusting roller 4 is installed on the front end of the handle 1 through a pin shaft 6, and the pin shaft 6 is connected with the front end of the handle 1 by threads.

The adjustment roller 4 acts on the spring 7 that exerts force to the movable block 3 away from the direction of the fixed block 2, shown in the figure as being sleeved on the bearing pin 6 and resisting the helical pressure spring on the front end of the handle and the adjustment roller.

The movable block is slidably installed on the front end of the handle.

The design basis of the present utility model is:

1. Thread pitch diameter d: d=d1-0.5p

2. Helix angle α: tanα=(n*p)/(π*d)

3. Tightening torque M: M=F*d/2=(d/2)*Ctan(α+φe)

In the above 3 formulas: P is the pitch, d1 is the outer diameter of the roller, φe is the equivalent friction angle, F is the horizontal force, Q is the vertical load, and n is the number of thread starts (1, 2, 3, ...).

Taking the 10" wrench as an example, under the premise of not changing the space size of the working head of the adjustable wrench, the helix angle α of the utility model adjustable wrench α = 12°, which is twice the helix angle of the existing adjustable wrench, so the movable The moving speed of the block is fast, the stress condition is good, the self-locking function is intact, and the cost of manufacturing is not increased. After testing, the ultimate torque of the adjustable wrench of the utility model is increased by 15% to 20% compared with that of the existing adjustable wrench.

Claims (4)

1, big torsion rapid adjustable wrench, comprise handle (1), be positioned at handle (1) front end and be linked as whole fixed block (2) with handle (1), be installed in handle (1) front end can relative to described fixed block (2) move with regulate and fixed block (2) between the movable block (3) of distance and the rotating adjusting roller of front end (4) that is installed in handle (1), described adjusting roller (4) and movable block (3) are by setting up spiral tooth (51 thereon separately, 52) cooperation realizes regulating adjusting and the self-locking of roller (4) to movable block (3), it is characterized in that: divide the spiral tooth (51 that is located on described adjusting roller (4) and the movable block (3), 52) a number is at least 2.

2, big torsion rapid adjustable wrench according to claim 1 is characterized in that described adjusting roller (4) is installed in the front end of handle (1) by bearing pin (6).

3, big torsion rapid adjustable wrench according to claim 1 and 2 is characterized in that described adjusting roller (4) upward acts on the spring (7) of oriented described movable block (3) away from the direction application of force of described fixed block (2).

4, big torsion rapid adjustable wrench according to claim 1 is characterized in that described movable block (3) is slidingly mounted on the front end of described handle (1).

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