CN107344343A - Single direction rotation spanner - Google Patents

Abstract

The invention discloses a one-way rotary wrench. The inner sleeve can be rotatably inserted in the outer sleeve. The inner sleeve is provided with a pattern capable of locking with the bolt head or the outer circumferential direction of the nut. The inner wall of the outer sleeve is provided with a There is at least one elongated opening groove, the depth of the elongated opening groove gradually decreases along the rotation direction of the inner sleeve, and the moving block can move along the rotation direction of the inner sleeve and is positioned at the joint formed by the elongated opening groove and the outer wall of the inner sleeve In the space, the distance between the shallow end of the elongated opening groove on the inner wall of the jacket and the outer wall of the inner sleeve is smaller than the size of the moving block along the depth direction of the elongated opening groove, and the depth of the elongated opening groove on the inner wall of the outer jacket is deep The distance between one end of the inner casing and the outer wall of the inner sleeve is greater than the size of the moving block along the depth direction of the elongated opening groove, and the elastic member can provide the moving block with an elastic force to move toward the shallow end of the elongated opening groove. The structure of the present invention Simple, stepless, silent, low manufacturing cost and long service life.

Description

One-way rotary wrench

technical field

The invention relates to a hardware tool, in particular to a one-way rotary wrench.

Background technique

When using a wrench to tighten bolts or nuts, it is necessary to turn the wrench at a certain angle, remove the wrench, put it on again and screw it again, which is cumbersome and time-consuming to use. At present, there are one-way rotating wrenches with internal ratchet and pawl mechanisms, which can be used continuously. However, this kind of one-way rotating wrench is affected by the ratchet and ratchet, and cannot be implemented within a certain small angle range. When turning, the collision of the ratchet and the pawl will produce a rattling sound, forming noise. .

Contents of the invention

In order to overcome the above defects, the present invention provides a one-way rotary wrench, which can realize stepless and silent one-way rotary operation.

The technical solution adopted by the present invention in order to solve the technical problem is: a one-way rotary wrench, including an outer sleeve, an inner sleeve, an elastic member and a moving block, the inner sleeve is rotatably inserted in the outer sleeve, and the inner sleeve is provided with a There is a pattern that can be locked with the bolt head or the outer circumferential direction of the nut, and at least one elongated opening groove is provided on the inner wall of the outer sleeve, and the depth of the elongated opening groove along the rotation direction of the inner sleeve gradually decreases. The moving block can move along the rotation direction of the inner sleeve and is positioned in the space formed by the elongated opening groove and the outer side wall of the inner sleeve, and between the shallow end of the elongated opening groove on the inner side wall of the outer sleeve and the outer side wall of the inner sleeve The distance is smaller than the size of the moving block along the depth direction of the elongated opening groove, and the distance between the end of the deep elongated opening groove on the inner wall of the outer jacket and the outer wall of the inner sleeve is greater than the distance between the moving block along the depth direction of the elongated opening groove. size, the elastic member can provide the moving block with an elastic force to move toward the shallow end of the elongated opening groove.

As a further improvement of the present invention, the inside of the inner sleeve forms a multi-pointed star-shaped flower shape.

As a further improvement of the present invention, the moving block is a roller, and the outer surface of the roller circumference is in contact with the bottom surface of the elongated opening groove and the outer wall of the inner sleeve respectively.

As a further improvement of the present invention, one end of the elastic member is in close contact with the side wall of the elongated opening groove inside the casing, and the other end is in close contact with the moving block.

As a further improvement of the present invention, the elastic member is a spring.

As a further improvement of the present invention, six elongated opening grooves are evenly distributed on the inner side of the outer sleeve, and an acute angle is formed between the side wall of the shallow end of the elongated opening groove and the outer wall of the inner sleeve.

As a further improvement of the present invention, an operating handle is also provided on the outside of the jacket.

As a further improvement of the present invention, an open-end wrench is provided at the end of the operating handle on the outer casing.

The beneficial effects of the present invention are: the present invention sets a long strip-shaped open groove with varying depth on the inner side of the wrench outer cover, and arranges an elastic member and a moving block in it, so as to realize one-way tightness and locking of the inner sleeve, and further realizes The wrench rotates in one direction. The invention avoids the application of ratchets and pawls, realizes stepless rotation, and avoids the noise caused by the impact of internal parts. It is a one-way rotation wrench that is easy to use, simple in structure, stepless and silent. , and because of its simple structure, the manufacturing cost is greatly reduced, it is not easy to be damaged in long-term use, and has a long service life.

Description of drawings

Fig. 1 is a perspective view of the present invention;

Fig. 2 is the front view of the present invention;

Fig. 3 is a structural principle diagram of the present invention;

Fig. 4 is an enlarged view of part A in Fig. 3;

Fig. 5 is a three-dimensional view of the roller;

Fig. 6 is a perspective view of the inner sleeve.

detailed description

Embodiment: A kind of one-way rotation wrench, comprises outer cover 1, inner cover 2, elastic member 3 and moving block 4, and described inner cover 2 can be rotatably inserted in the outer cover 1, and inner cover 2 is provided with can be connected with bolt The pattern 5 of the head or the outer circumferential direction of the nut is stopped. At least one elongated opening groove 6 is provided on the inner wall of the outer sleeve 1. The depth of the elongated opening groove 6 along the rotation direction of the inner sleeve 2 gradually decreases. The moving block 4 can move along the rotation direction of the inner sleeve 2 and is positioned in the space formed by the elongated opening groove 6 and the outer wall of the inner sleeve 2, and the end of the elongated opening groove 6 on the inner wall of the outer sleeve 1 is shallow in depth. The distance between the outer wall of the inner sleeve 2 is less than the size of the moving block 4 along the depth direction of the elongated opening groove 6; The distance is greater than the dimension of the moving block 4 along the depth direction of the elongated opening slot 6 , and the elastic member 3 can provide the moving block 4 with an elastic force to move toward the shallow end of the elongated opening slot 6 .

When in use, put the inner sleeve 2 on the outside of the bolt head or the nut. At this time, the pattern 5 on the inner side of the inner sleeve 2 is engaged with the bolt head or the outside of the nut, and then rotate the outer sleeve 1. When the outer sleeve 1 is rotated forward, The inner sleeve 2 and the outer sleeve 1 produce a critical state of relative rotation. At this time, the friction between the inner sleeve 2 and the moving block 4 drives the moving block 4 to move toward the shallow end of the elongated opening groove 6 inside the outer sleeve 1, resulting in The outer wall of the inner sleeve 2, the moving block 4, and the bottom surface of the elongated opening groove 6 of the outer sleeve 1 form a tight extrusion state and are stuck. At this time, the inner sleeve 2 cannot continue to rotate relative to the outer sleeve 1, and then rotates in the same direction as the outer sleeve 1 to realize the opposite direction. The rotation operation of the bolt and the nut, after a certain angle of rotation, when the outer sleeve 1 rotates in the opposite direction, the inner sleeve 2 and the outer sleeve 1, the inner sleeve 2 and the outer sleeve 1 produce a critical state of relative rotation again, at this time, the inner sleeve 2 and the moving block 4 The moving block 4 is driven to move toward the deep end of the elongated opening groove 6 inside the outer sleeve 1 through the extrusion friction force, and the friction force between the inner sleeve 2 and the moving block 4 is not enough to overcome the torsion of the bolt or nut. 2 Stop the rotation, so that the bolt or nut can be tightened or loosened after repeated cycles. This mechanism can realize the stepless one-way rotation of the wrench, and there is no noise during the rotation process. It is easy to use, simple in structure, and avoids ratchets and ratchets. Claw design, long service life and low manufacturing cost.

The inner side of the inner sleeve 2 forms a multi-pointed star-shaped flower pattern 5, which can be applied to bolt heads and nuts of any shape, and of course other flower patterns 5 such as hexagonal or quincunx can also be used.

The moving block 4 is a roller, and the outer surface of the roller circumference is in contact with the bottom surface of the elongated opening groove 6 and the outer side wall of the inner sleeve 2 respectively, and the roller and the bottom surface of the elongated opening groove 6 and the outer surface of the inner sleeve 2 are rolling Contact, the friction is small during the rolling process, it is not easy to wear, and it is not easy to be stuck, and it is smooth to use, and the contact between the roller and the bottom surface of the long strip-shaped opening groove 6 and the outer surface of the inner sleeve 2 is a line contact, the pressure is small, and the strip is not easy to damage Shape opening groove 6 bottom surfaces and interior cover 2 lateral surface, and wherein roller is the best steel column, and moving block 4 also can be steel ball, slide block etc. in addition.

One end of the elastic member 3 is close to the side wall of the elongated opening groove 6 inside the jacket 1 , and the other end is close to the moving block 4 .

The elastic member 3 is a spring.

There are six elongated opening grooves 6 evenly distributed on the inner side of the outer cover 1, and an acute angle is formed between the side wall of the shallow end of the elongated opening groove 6 and the outer wall of the inner sleeve 2, and inside the plurality of elongated opening grooves 6 The synchronous action of the moving block 4 improves the holding force when the inner sleeve 2 and the outer sleeve 1 are engaged, ensuring that there is a large enough engagement force between the inner sleeve 2 and the outer sleeve 1 to realize the twisting of the bolt or nut, and the depth of the long strip opening groove 6 The acute-angled structure between the shallow end side wall and the outer wall of the inner sleeve 2 makes the moving block 4 tightly pressed and will not continue to move, ensuring that the inner sleeve 2 remains in a stable state when it is stuck.

An operating handle 7 is also provided on the outer side of the jacket 1 to facilitate the operation of the jacket 1 with a relatively large rotational torque.

The end of the operating handle 7 on the outer cover 1 is also provided with an open-end wrench 8, and the open-end wrench 8 is used in conjunction with a one-way wrench to realize common use in various situations, high versatility, and more convenient to use.

Claims (8)

1. A one-way rotary wrench, characterized in that: comprising an overcoat (1), an inner sleeve (2), an elastic member (3) and a moving block (4), the inner sleeve is rotatably inserted in the overcoat, The inside of the inner sleeve is provided with a pattern (5) that can be locked with the bolt head or the outer circumferential direction of the nut, and at least one elongated opening groove (6) is provided on the inner wall of the outer sleeve. The depth of the inner sleeve in the direction of rotation decreases gradually, and the moving block is positioned in the space formed by the elongated opening groove and the outer side wall of the inner sleeve so as to be able to move along the rotation direction of the inner sleeve, and the depth of the elongated opening groove on the inner side wall of the outer sleeve is The distance between the shallow end and the outer wall of the inner sleeve is smaller than the dimension of the moving block along the depth direction of the elongated opening groove, and the distance between the deep end of the elongated opening groove on the inner wall of the outer jacket and the outer wall of the inner sleeve is greater than that of the moving block. The size of the block along the depth direction of the elongated opening groove, the elastic member can provide the moving block with an elastic force to move toward the shallow end of the elongated opening groove. 2. The one-way rotary wrench according to claim 1, characterized in that: the inner side of the inner sleeve forms a multi-pointed star-shaped flower shape. 3. The one-way rotary wrench according to claim 2, characterized in that: the moving block is a roller, and the outer surface of the circumference of the roller is respectively in contact with the bottom surface of the elongated open groove and the outer wall of the inner sleeve. 4 . The one-way rotary wrench according to claim 1 , wherein one end of the elastic member is tightly abutted against the side wall of the elongated opening groove inside the casing, and the other end is abutted against the moving block. 5. The one-way rotary wrench according to claim 4, wherein the elastic member is a spring. 6. The one-way rotary wrench according to claim 4, characterized in that: there are six elongated opening grooves evenly distributed on the inner side of the outer sleeve, and there is a gap between the side wall of the shallow end of the elongated opening groove and the outer wall of the inner sleeve. form an acute angle. 7. The one-way rotary wrench according to claim 1, characterized in that: an operating handle (7) is provided on the outer side of the casing. 8. The one-way rotary wrench according to claim 7, characterized in that: an open-end wrench (8) is also provided at the end of the operating handle on the casing.