CN201201208Y - Excessive force-proof wrench - Google Patents

Abstract

The utility model relates to a hardware tool, in particular to an overlarge force resistant wrench, which consists of a handle shaft, a slave handle, a shaft sleeve, a pin, a spring, a seal, a main handle and a wrench, wherein the main handle and the slave handle take the shape of strip plates; one end of the main handle is provided with the cylindrical handle shaft the axial line of which is perpendicular to a plate surface of the main handle; one end of the slave handle is provided with the wrench which is integrated into a whole with the slave handle, and the other end of the slave handle is provided with the shaft sleeve which is integrated into a whole with the slave handle; the shaft sleeve is sleeved on the handle shaft and movably matched with the handle shaft; the shaft sleeve is provided with a step through hole which faces to a groove on the handle shaft; the inside of the hole is provided with the pin, the spring and the seal in turn; and the seal compresses the spring and seals the spring inside the hole. The overlarge force resistant wrench can make the handle of the wrench bended in time on a joint of the main handle and the slave handle when a screw cap bears an overlarge force, thereby effectively protecting the screw nut from being damaged and improving the work efficiency.

Description

Prevented torque wrench

Technical field

The utility model relates to a kind of hardware ﹠ tools, particularly relates to a kind of torque wrench of preventing.

Background technology

Existing spanner overexerts in the time of can taking place because of twisting usually, and torsion makes the corner angle distortion of nut, situation about damaging above being turned round the yield strength of nut.

The utility model content

The utility model is for solving the deficiencies in the prior art, provide a kind of can be before torsion that nut is subjected to be near its yield strength limit, pinch bar in time bends, and makes the torque wrench of preventing that nut avoids decreasing.

The scheme that solves the utility model technical problem is: prevented that torque wrench was by arbor, form from handle, axle sleeve, pin, spring, sealing, main handle and spanner.Main handle with become the elongated plates shape from handle, an end of main handle have the plate face of an axial line and main handle vertical become columniform arbor.From an end of handle be and be the spanner of one that the other end is and be the axle sleeve of one from handle from handle.A cannelure is arranged on the arbor, the degree of depth of groove is 1/3 of an arbor wall thickness, the width of groove is than the big 0.05--0.1mm of head spherical diameter of pin, there is a bottom to become the hole of sphere in the groove, the diameter in hole is identical with the width of groove, the hole becomes the camber line transition with the intersection of groove, the hole the degree of depth be the pin head diameter 2/3, axle sleeve is enclosed within on the arbor, each other in movingly, have a step through hole on the axle sleeve, the groove of this hole on the arbor, pin, spring and sealing are housed in the hole successively, and sealing is enclosed in the hole after spring is compressed.

When spanner uses first, the head of axle sleeve and pin then slides in the cannelure of arbor, and when the hole in the pin head process arbor cannelure, pin promptly inserts in the hole under the effect of spring, this moment arbor and axle sleeve fixed relative position, main handle and in alignment from handle.When normal use spanner because arbor and axle sleeve fixed by pin, main handle and from handle jointly with the strength transmission of hand to spanner.The torsion that is subjected to when nut is during near its yield strength limit, the head of pin skids off from the hole, but pin slides in groove all the time, so, though axle sleeve can not make arbor withdraw from axle sleeve, after angle of main handle counter-rotation rotating around arbor, pin just falls into the hole again, and spanner can continue normal use.

Adopt such scheme, can reach following effect:

Because the utility model can make the handle of spanner in time bend at main handle with from the handle connecting portion when nut is subjected to excessive forces, has protected nut not to be damaged effectively, has also improved operating efficiency.

Description of drawings

Fig. 1 is a structural representation of preventing torque wrench;

Fig. 2 is the profile at the A place of Fig. 1.

Among the figure: 1. arbor 2. is from handle 3. axle sleeves 4. pins 5. springs 6. sealings 7. main handle 8. spanners

The specific embodiment

The utility model will be further described below in conjunction with drawings and Examples.

Prevented that torque wrench was by arbor 1, form from handle 2, axle sleeve 3, pin 4, spring 5, sealing 6, main handle 7 and spanner 8.Main handle 7 with from 2 one-tenth elongated plates shapes of handle, an end of main handle 7 have the plate face of an axial line and main handle 7 vertical become columniform arbor 1.Be and be the spanner 8 of one that from an end of handle 2 other end is and is the axle sleeve 3 of one from handle 2 from handle 2.A cannelure is arranged on the arbor 1, the degree of depth of groove is 1/3 of arbor 1 wall thickness, the width of groove is than the big 0.1mm of head spherical diameter of pin 4, there is a bottom to become the hole of sphere in the groove, the diameter in hole is identical with the width of groove, the hole becomes the camber line transition with the intersection of groove, the hole the degree of depth be pin 4 heads diameter 2/3, axle sleeve 3 is enclosed within on the arbor 1, each other in movingly, have a step through hole on the axle sleeve 3, the groove of this hole on the arbor 1, pin 4, spring 5 are housed in the hole successively and seal 6, sealing 6 is enclosed in the hole after spring 5 is compressed.When spanner uses first, the head of axle sleeve 3 and pin 4 then slides in the cannelure of arbor 1, when the hole in pin 4 heads process arbor 1 cannelure, pin 4 promptly inserts in the hole under the effect of spring 5, this moment arbor 1 with the fixed relative position of axle sleeve 3, main handle 7 and in alignment from handle 2.When normal use spanner because arbor 1 fixed by pin 4 with axle sleeve 3, main handle 7 and from handle 2 jointly with the strength transmission of hand to spanner 8.The torsion that is subjected to when nut is during near its yield strength limit, the head of pin 4 skids off from the hole, but pin 4 slides in groove all the time, so, though axle sleeve 3 can not make arbor 1 withdraw from axle sleeve 3, after angle of main handle 7 counter-rotation rotating around arbor 1, pin 4 just falls into the hole again, and spanner can continue normal use.

Claims (1)

1. prevented that torque wrench was by arbor for one kind, from handle, axle sleeve, pin, spring, sealing, main handle and spanner are formed, it is characterized in that: main handle with become the elongated plates shape from handle, one end of main handle have the plate face of an axial line and main handle vertical become columniform arbor, from an end of handle be and be the spanner of one from handle, the other end is and be the axle sleeve of one from handle, a cannelure is arranged on the arbor, the degree of depth of groove is 1/3 of an arbor wall thickness, the width of groove is than the big 0.05--0.1mm of head spherical diameter of pin, there is a bottom to become the hole of sphere in the groove, the diameter in hole is identical with the width of groove, the hole becomes the camber line transition with the intersection of groove, the hole the degree of depth be the pin head diameter 2/3, axle sleeve is enclosed within on the arbor, each other in movingly, have a step through hole on the axle sleeve, the groove of this hole on the arbor is equipped with pin successively in the hole, spring and sealing, sealing are enclosed in the hole after spring is compressed.

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