JP2005074541A - Structure improvement of wrench fitting part - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an improved structure of a wrench fitting part for preventing the fitting part from slipping to idly turn and preventing the damage of the fitting part when tightening and loosening a bolt and a nut. <P>SOLUTION: A circular arc convex surface 24 of the wrench fitting part 22 is shaped to present a large circular arm form to prevent damage when fitting the circular arc convex surface 24 to the bolt and nut outer side face, and also to prevent the fitting part from slipping to idly turn when tightening and loosening. A basic angle of a storage clearance 23 is designed to present a small circular arc form to disperse stress generated when tightening and loosening the bolt and nut to thereby prevent the damage of the fitting part 22. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a structure improvement of a wrench fitting portion, and in particular, in order to make the fitting portion more practical, the design of the arc convex surface of the fitting portion is made a large arc shape to reduce the contact area with the bolt and nut. The structure of the wrench fitting part has the effect of spreading the stress of the fitting part by preventing the slipping and slipping of the fitting part and at the same time making the bottom angle of the storage gap into a small arc shape Involved.

At present, the development of hand tools is very mature, and the industry has limited room for development. In the known hand tools, the structure and material are improved, and the comfort and practicality of use are rich. There are many.
In the wrench, the range of use is the widest, and the design of the fitting part of the wrench has a great influence on the ease of tightening the bolts and nuts and the occurrence of idle rotation of the fitting part.
As shown in FIG. 9, the structure of the fitting portion of the known structure is composed of a plurality of arcuate convex surfaces and a storage gap. Generally speaking, the corners of the bolts and nuts are formed in the storage gap of the fitting portion. When the bolts and nuts are stored and tightened, the fitting part is prevented from slipping and spinning freely, and the action of the convex arc surface is to contact the side surfaces of the bolts and nuts and to fit the bolts and nuts.
However, the disadvantage of this type of wrench of known structure is that stress is concentrated due to the right angle of the base angle, which is not practical, and the structure of this type of right angle is difficult to manufacture. It is difficult, and it is not easy to form whether it is milling or casting.
Further, the ratio of the depth T between the arc convex surface of the wrench of this type of known structure and the length L between the bottom angles of the two storage gaps is 1: 2. In other words, the depth of the arc convex surface of a wrench of this type of known structure is only one half of the length between the bottom angles of the two storage gaps, and the arc convex surface having a relatively shallow depth and the side surface of the bolt and nut The contact area becomes relatively small, and therefore, when the bolts and nuts are tightened, there is a drawback that the fitting part is slippery and easily rotates.

  In order to solve the disadvantages of the known structure, the present invention can prevent the fitting portion from slipping and spinning when the bolt and nut are tightened, and the stress generated when the bolt and nut are tightened. It is an object of the present invention to provide a structure improvement of a wrench fitting portion that can disperse and prevent breakage of the fitting portion.

  In order to solve the above-mentioned problems, the present invention mainly relates to a structure improvement of a kind of wrench fitting portion, and is mainly composed of a wrench main body and a rotating body, and the wrench main body is provided with a handle portion. A head portion is provided at at least one end of the handle portion, a locking edge portion for locking the O-ring is provided at the bottom edge of the head portion, and a storage space is provided in the middle of the head portion. The rotating body can be stored in the storage space, and a hole portion is provided between the head portion and the handle portion, and the hole portion penetrates the storage space of the head portion. The portion is provided with a stopper structure that meshes with the rotating body. The rotating body has ratchet teeth that engage with the stopper structure on the outer edge, and a fitting portion for fitting a bolt and a nut is provided on the inner edge. The fitting portion has a plurality of arcs. It is comprised by the storage gap which exhibits a shape, and several arc convex surfaces.

  The main feature of the present invention is to prevent the bolts and nuts from being damaged when fitting the arc convex surface to the bolt and nut by designing the arc convex surface of the fitting portion to have a large arc shape. And the arc convex surface of the fitting part is designed to have a large arc shape, so that the fitting part can be firmly fitted to the side of the bolt and nut, and when the bolt and nut are tightened, the fitting part It is effective in preventing slipping and slipping, and by designing the bottom angle of the storage gap to have a small arc shape, the stress generated when tightening the bolt and nut is dispersed and fitted. Has the effect of preventing breakage of joints.

  The present invention mainly relates to a structure improvement of a kind of wrench fitting part, and is mainly composed of a wrench main body and a rotating body, and the wrench main body is provided with a handle part, and at least one end of the handle part is provided. A head portion is provided, and a locking edge portion for locking the O-ring is provided at the bottom edge of the head portion, and a storage space is formed in the middle of the head portion. The rotating body can be stored in the space, and a hole is provided between the head portion and the handle portion. The hole penetrates the storage space of the head portion, and the hole engages with the rotating body. A stopper structure is provided. The rotating body has ratchet teeth that engage with the stopper structure on the outer edge, and a fitting portion for fitting a bolt and a nut is provided on the inner edge, and the fitting portion has a plurality of arcs. It is a structure improvement of a wrench fitting part, characterized by being configured by a storage gap having a shape and a plurality of arcuate convex surfaces, and the most preferred embodiment of the present invention will be described taking a ratchet wrench as an example, Actually, it can be applied to different types of hand tools depending on the needs of the user.

  As shown in FIGS. 1, 2, and 3, the wrench main body 10 and the rotating body 20 are mainly configured, and the wrench main body 10 is provided with a handle portion 12. A head portion 14 is provided, and a locking portion 15 for locking the O-ring 17 is provided at the bottom edge of the head portion 14. A storage space 16 is formed in the middle of the head portion 14. The rotating body 20 can be stored in the storage space 16, and a hole 18 is provided between the head portion 14 and the handle portion 12. The hole 18 penetrates the storage space 16 of the head portion 14. The hole 18 is provided with a stopper structure 30 constituted by a stopper 31, a spring 32 and a fixing screw 33.

  The rotating body 20 has ratchet teeth 21 that engage with the stopper structure 30 on the outer edge, and a fitting portion 22 for fitting a bolt / nut 40 is provided on the inner edge. Is constituted by a storage gap 23 having a plurality of arc shapes and a plurality of arc convex surfaces 24.

  The main feature of the present invention lies in the improvement of the fitting portion 22 at the inner edge of the rotating body 20, and as shown in FIG. 4, the bottom angle 25 of the storage gap 23 of the present invention is designed to have a small arc shape. Therefore, it is easy to form the fitting part by milling or casting, and at the same time, the bottom angle 25 is designed to have a small arc shape. This has the effect of dispersing the stress to prevent the fitting portion 22 from being damaged.

  The arc convex surface 24 of the present invention has a large arc shape, and the main effect of the generally known arc convex surface 24 is that when the bolt / nut 40 is tightened or loosened by the fitting portion 22, the arc convex surface 24 is It is in contact with the side surface 41 of the nut 40 to prevent the fitting portion from slipping and spinning. In the present invention, by designing the arc convex surface 24 to have a large arc shape, the fitting portion 22 can be firmly fitted to the side surface 41 of the bolt / nut 40, and the fitting portion can slip and idle. Can be prevented.

  The side surface 41 of the bolt and nut 40 is extremely weak. However, the place where the strongest force is received when tightening is the side surface 41 of the bolt and nut. In the present invention, in order to prevent the side surface 41 of the bolt / nut 40 from being damaged during tightening, the arc convex surface 24 that contacts the side surface 41 of the bolt / nut 40 is specially designed to have a large arc shape. The side surface 41 of the 40 can be prevented from being damaged.

  The arc convex surface 24 of the present invention can prevent the fitting portion from slipping and idling, and the depth T between the arc convex surface 24 designed to have a large arc shape and the two bottom angles 25 of the storage gap 23. The ratio of the length L is 1: 1.6, and by increasing the depth T of the arc convex surface 24, the contact area between the arc convex surface 24 and the side surface 41 of the bolt / nut 40 is increased. It is possible to prevent the fitting portion from slipping and spinning.

  As shown in FIG. 5, as a second embodiment of the improved structure of the fitting portion 22 of the present invention, the design of the fitting portion 22 can be used on the socket 50. The fitting part 51 is provided, and the fitting part 52 of the same design as the fitting part 22 of the above-mentioned wrench main body 10 is provided in the lower end inner edge.

  An insertion port 53 is provided in the insertion part 51 of the socket 50, and a storage gap 54 and an arcuate convex surface 55 are formed on the outer edge corresponding to the design of the fitting part 22 of the rotating body 20 in the above-described most preferred embodiment. The socket 50 is fitted to the fitting portion 22 of the wrench body 10 described above, and the fitting portion 52 at the lower end of the socket is fitted to the bolt and nut, so that it is the same as the most preferred embodiment described above. The effect of can be achieved.

  As shown in FIG. 7, the socket 50 is provided with an insertion portion 51 formed of a storage gap 54 and an arcuate convex surface 55 at the outer edge at the upper end, and is similarly provided with an insertion port 53 at the inner edge. Is provided with a tightening portion having a hexagonal shape.

  As shown in FIG. 8, an insertion port 53 for fitting a general socket wrench (not shown) is provided at one end of the socket 50, and the above-mentioned most suitable is similarly provided at the inner edge of the other end. The same fitting portion 52 as that of the embodiment is provided, and the same effect as that of the above-described embodiment can be achieved by such a combination of different forms.

It is an exploded view of the structure improvement of the wrench fitting part in this invention. It is an external view of the structure improvement of the wrench fitting part in this invention. It is sectional drawing of the structure improvement of the wrench fitting part in this invention. It is an enlarged view of the structure improvement of the wrench fitting part in FIG. 3 of this invention. It is an external view of the structure improvement of the wrench fitting part in 2nd Example of this invention. It is a figure which shows fitting to the bolt of the fitting part in the socket which concerns on the structure improvement of the wrench fitting part of this invention, and a 1st Example. FIG. 6 is an external view showing another embodiment of the structure improvement of the wrench fitting portion in the present invention. FIG. 6 is an external view showing another embodiment of the structure improvement of the wrench fitting portion in the present invention. It is a top view which shows the structure of the wrench fitting part in a well-known structure.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Wrench main body 12 Handle part 14 Head part 15 Locking edge part 16 Storage space 17 O-ring 18 Hole part 20 Rotating body 21 Ratchet tooth 22 Fitting part 23 Storage gap 24 Arc convex surface 25 Bottom angle 30 Stopper structure 31 Stopper 32 Spring 33 Fixing screw 40 Bolt / Nut 41 Side surface 50 Socket 51 Fitting portion 52 Fitting portion 53 Insertion port 54 Storage gap 55 Arc convex surface 56 Fastening portion

Claims (4)

Mainly including the wrench body,
The wrench body is provided with a handle for gripping with a hand, and at least one end of the handle is provided with a fitting portion that is fitted when a bolt or nut is tightened. The inner edge of the joint is provided with a plurality of large convex arcuate surfaces that contact the outer surface of the bolt and nut, and a plurality of storage gaps for storing the corners of the bolt and nut. The base angle has a small arc shape,
Wrench fitting characterized in that the ratio of the length L between the depth T of the convex arc surface having a large arc shape, the base angle of the storage gap and the base angle of the other storage gap is 1: 1.6 Improved structure of the part. Mainly including sockets,
One end of the socket is provided with a fitting portion for fitting with a fitting portion of a wrench, an insertion port is provided at the inner edge of the fitting portion, and a plurality of arc convex surfaces and a storage gap are provided at the outer edge. The bottom angle of the storage gap has a small arc shape, and the other end of the fitting part is provided with a fitting part that fits when tightening the bolt and nut. Similarly, an arc convex surface and a storage gap are formed at the inner edge of the part, and the bottom angle of the storage gap has a small arc shape,
The ratio of the length L between the insertion portion of the socket and the depth T of the convex arc of the fitting portion, the bottom angle of the storage gap, and the bottom angle of the other storage gap is 1: 1.6. Improved structure of wrench fitting part.   The wrench fitting portion according to claim 2, wherein the fitting portion at one end of the socket provided with the plurality of convex arc surfaces and the storage gap can be a tightening portion having a hexagonal shape. Improved structure. Mainly including sockets,
One end of the socket is provided with an insertion port, and the other end is provided with a fitting portion for fitting when tightening or loosening a bolt or nut. And the storage gap is provided, the bottom angle of the storage gap has a small arc shape,
Wrench characterized in that the ratio of the length T between the depth T of the arc convex surface of the socket insertion portion and the fitting portion, the bottom angle of the storage gap, and the bottom angle of the other storage gap is 1: 1.6. Improved structure of the fitting part.

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