JP2022077941A - Slipping-out preventive joint sleeve - Google Patents

Abstract

To provide a slipping-out preventive joint sleeve for improving safety by preventing spontaneous departure with a driving head.SOLUTION: In a slipping-out preventive joint sleeve having a driving part and an action part, the driving part is extendedly arranged by recessing a driving hole inward in an axial direction on an end surface, and has a plurality of hole walls of extending the driving hole in the axial direction, and a slipping-out preventive groove respectively recessed in the radial direction is formed on at least two hole walls positioned on an opposite surface, and a first guide inclined face inclined in an annular shape is extendedly arranged by recessing inward in the axial direction on an end surface of the driving part, and a tip end of the first guide inclined face contacts with the end surface of the driving part, and an outer diameter of the first guide inclined face is larger than a hole diameter of the driving hole, and a respectively inclined second guide inclined face is further formed between the tip of the respective hole walls of the driving hole and a bottom end of the first guide inclined face, and the second guide inclined face is also directly adjacent to the first guide inclined face, and the action part is connected in the axial direction to the driving part, and an action hole is extendedly arranged by recessing in the axial direction on the end surface.SELECTED DRAWING: Figure 4

Description

The present invention relates to a metal fitting for a drive tool, and specifically to a retaining joint sleeve.

Conventionally, in order to apply a force more easily and accurately when tightening or loosening a nut, a joint sleeve is generally temporarily joined between the nut and a drive tool, and the rotational force generated by the drive tool is generally used. Is transmitted to the nut via the joint sleeve. This serves to tighten and loosen the nut.

As shown in FIGS. 1 and 2, Taiwanese patent number I690392 discloses sleeve tool 1. The sleeve tool 1 is used to be fitted to the drive head 91 of the drive tool 90, and a retainer ring 92 (C-shaped retainer ring) is provided on the outer peripheral surface of the drive head 91. A joint portion 2 and an action portion 3 are provided, the joint portion 2 has an accommodating groove 4 recessed from the upper surface, and a side surface 5 of the accommodating groove 4 is a plane parallel to the axial direction (axial core line). The bottom surface 6 of the accommodating groove 4 is a conical surface (that is, an inclined surface), the accommodating groove 4 can accommodate the retainer ring 92 of the drive head 91, and the accommodating groove 4 is axial to the joint portion 2. A polygonal hole 7 penetrating in the direction is further provided, the polygonal hole 7 can accommodate the drive head 91, and the working portion 3 has a working hole 8 that can be fitted into a nut. Have.
In this way, when connecting the drive head 91 to the sleeve tool 1, first, the retainer ring 92 of the drive head 91 is accommodated in the accommodating groove 4 of the sleeve tool 1 (shown in FIG. 1) and used. A person can correctly align the polygonal hole 7 by simply rotating the drive head 91 lightly, and when the drive head 91 is correctly aligned, the drive head 91 is pushed into the polygonal hole 7 together with the retainer ring 92 (FIG. FIG. (Shown in 2), thereby realizing the function of promptly completing the fitting.

The retainer ring 92 of the drive head 91 disclosed above is fastened to the polygonal hole 7 of the sleeve tool 1, however, the hole wall of the polygonal hole 7 is a flat and linear wall surface, and the retainer. Since the ring 92 is generally a C-shaped retainer ring having a certain elastic deformation ability, when the retainer ring 92 is slightly compressed and deformed in the process of rotation of the drive head 91, the retainer ring 92 is driven. There is a high possibility that the sleeve tool 1 will come out of the polygonal hole 7 of the sleeve tool 1 together with the head 91 (that is, the sleeve tool 1 will come off the drive head 91). Not only does this cause inconvenience in use, but in severe cases, the sleeve tool 1 may be blown at high speed, injuring the user, and there is a safety risk.

Further, in the sleeve tool 1 disclosed above, the main function of the accommodation groove 4 is to first accommodate the tip of the retainer ring 92 of the drive head 91 so that the sleeve tool 1 can be rotated later to be aligned and pushed in. However, since the side surface 5 of the accommodating groove 4 is designed to be a flat surface extending in parallel with the axial direction (axis core line), a large amount of material is cut off during manufacturing, causing waste of material and rigidity. When the drive head 91 rotates in synchronization with the sleeve tool 1, there is a risk of shaking or loosening.

Conventional sleeve tools voluntarily separate from the drive tool, impairing safety, inadequate driving process, and the side surface of the accommodating groove is designed to be a flat surface parallel to the axis. Therefore, it is known that there are problems such as waste of materials and deterioration of the composition.
In view of the above, in order to improve the prior art, the present invention provides a retaining joint sleeve provided with a drive portion and an action portion, and the drive portion has a drive hole recessed inward in the axial direction on an end surface of the drive portion. The drive portion has a plurality of hole walls that are extended and the drive holes extend in the axial direction, and at least two hole walls located on opposite surfaces are formed with radial retaining grooves. The first guide inclined surface inclined in an annular shape on the end surface is recessed inward in the axial direction and extends, the tip of the first guide inclined surface comes into contact with the end surface of the driving portion, and the outer diameter of the first guide inclined surface is reached. Is larger than the hole diameter of the drive hole, and a second guide inclined surface that is inclined is further formed between the tip of each hole wall of the drive hole and the bottom end of the first guide inclined surface. The second guide inclined surface is directly adjacent to the first guide inclined surface, the working portion is axially connected to the driving portion, and the working hole is vertically recessed and extended in the end surface.
This has the effects of preventing spontaneous detachment from the drive head, improving safety, improving the smoothness of the drive process, reducing material waste, and increasing rigidity.

The present invention further provides a retaining joint sleeve comprising a drive portion and an action portion, wherein the drive portion has a drive hole recessed inward in the axial direction on an end face and the drive hole extends in the axial direction. It has a plurality of extending hole walls, and at least two hole walls located on opposite surfaces are formed with retaining grooves recessed in the radial direction, from the top of each hole wall to the end surface of the drive portion. A guide inclined surface that extends incline and increases toward the outside is formed, and the angle between the virtual extension line extending outward from the guided inclined surface and the end surface of the drive unit is between 40 degrees and 80 degrees. The working portion is axially connected to the driving portion, and an working hole is recessed and extended in the end face in the axial direction.
This has the effects of preventing spontaneous detachment from the drive head, improving safety, improving the smoothness of the drive process, reducing material waste, and increasing rigidity.

It is a structural schematic diagram of a conventional sleeve tool. It is a schematic diagram of the coupling operation between the conventional sleeve tool and the drive tool shown in FIG. 1. It is a perspective view of the 1st preferable Example which concerns on this invention. It is a perspective sectional view of the Example shown in FIG. It is sectional drawing in the axial direction of the Example shown in FIG. It is a schematic diagram of the connection operation between the embodiment shown in FIG. 3 and a drive tool. It is a schematic diagram of the connection operation between the embodiment shown in FIG. 3 and a drive tool. It is a perspective view of the 2nd preferable Example which concerns on this invention. It is sectional drawing in the axial direction of the Example shown in FIG.

The following examples will be given with reference to the drawings so that the examiner can further understand and approve the features and characteristics of the present invention.

3 to 7 show the retaining joint sleeve 100 according to the first preferred embodiment of the present invention. It is manufactured integrally and mainly includes a drive unit 10 at one end and an action unit 20 coaxially connected to the drive unit 10 at the other end.
As shown in FIGS. 3 to 5, the drive portion 10 has a drive hole 11 extending inward in the axial direction on its end face (that is, a free end face), and the drive hole 11 is a parallelogram hole. It is (or is referred to as a quadrilateral hole) and has four hole walls 111 extending in the axial direction. On the same end surface of the drive unit 10, a first guide inclined surface 12 inclined in an annular direction is recessed inward in the axial direction and extends, and the tip of the first guide inclined surface 12 extends to the end surface of the drive unit 10. In contact with each other, the outer diameter of the first guide inclined surface 12 is larger than the hole diameter of the drive hole 11. A second guided inclined surface 13 is further formed between the tip of each hole wall 111 of the drive hole 11 and the bottom end of the first guided inclined surface 12, and the second guided inclined surface 13 is further formed. Is directly adjacent to the first guide inclined surface 12. Each hole wall 111 of the drive hole 11 has a retaining groove 14 recessed in the radial direction.

As shown in FIGS. 3 to 5, the working portion 20 is coaxially connected to the driving portion 10 as a unit, and the working hole 21 is vertically recessed and extended inward on the end face (that is, the free end face). The working hole 21 is a hexagonal hole. The outer diameter of the working portion 20 is the same as the outer diameter of the driving portion 10. The working hole 21 communicates with the driving hole 11.

The above has described the parts of each part of the retaining joint sleeve 100 according to the first preferred embodiment of the present invention and the combination method thereof. Next, the features in use thereof will be described below.

First, as shown in FIGS. 6 and 7, when the present invention is to be connected to the drive head 91 of the drive tool 90, a retainer ring 92 is provided on the peripheral surface near one end of the drive head 91. First, the retainer ring 92 is placed inside along the first guide inclined surface 12, passed through the first guide inclined surface 12, and then placed in the second guide inclined surface 13 (shown in FIG. 6). The drive head 91 is correctly aligned with the drive hole 11 by slightly rotating the invention. Next, a force is applied to push the drive head 91 together with the retainer ring 92 into the drive hole 11, and the retainer ring 92 is passed through the retaining groove 14 (shown in FIG. 7), and the retainer ring 92 is formed. It is tightened in the drive hole 11.
In this way, the working hole 21 of the working portion 20 can be fitted into a nut, a bolt or a screw nut (not shown), and the driving head of the driving tool 90 can be fitted through the retaining joint sleeve 100 of the present invention. The rotational force of 91 is transmitted to the nut, bolt or screw nut to facilitate loosening and tightening.

As described above, in the present invention, since each hole wall 111 of the drive hole 11 has a retaining groove 14 recessed in the radial direction, the nut, the bolt, and the screw nut are loosened or tightened by using the present invention. In the process, when the retainer ring 92 is slightly compressed and the drive head 91 is pulled back to the outside, the retainer ring 92 passes through the retaining groove 14 in the process of moving outward of the drive hole 11, and the retaining groove 14 is pulled out. When passing through the retaining groove 14, it slightly recovers and expands, and abuts in the retaining groove 14. This prevents the present invention from spontaneously detaching from the drive head 91.

In the present invention, since each hole wall 111 of the drive hole 11 has a retaining groove 14 recessed in the radial direction, the retainer ring 92 is slightly recovered and expanded when passing through the retaining groove 14. However, it abuts in the retaining groove 14, thereby preventing the present invention from spontaneously detaching from the drive head 91. This improves safety and allows you to work more smoothly.

Next, in the present invention, the first guide inclined surface 12 and the second guided inclined surface 13 in contact with the first guide inclined surface 12 are sequentially provided from the end surface of the drive unit 10 to the hole wall 111 of the drive hole 11, so that the retainer ring 92 is inserted. , And facilitates the alignment of the drive head 91. Also, by designing the two inclined surfaces, the material to be cut off is reduced, thereby reducing the waste of the material and increasing the overall rigidity. Further, the looseness and shaking between the present invention and the drive head are reduced, and the occurrence of risk is further reduced.

In the above embodiment, as shown in FIG. 5, the angle θ1 between the virtual extension line extending outward from the first guide inclined surface 12 and the end surface of the drive unit 10 is between 15 degrees and 45 degrees. .. The angle θ2 between the virtual extension line extending outward from the second guide inclined surface 13 and the end surface of the driving unit 10 is between 40 degrees and 80 degrees. The range of the inclination angle between the first guide inclined surface 12 and the second guide inclined surface 13 simultaneously exerts effects such as guidance, reduction of material to be cut off, and reduction of looseness with the drive head.

Further, in the above embodiment, the action hole is a hexagonal hole. However, in reality, the action hole may be any one of a quadrangular hole, an octagonal hole, a dodecagonal hole and a hexagram-shaped hole.

Further, in the above embodiment, the outer diameter of the driving part and the working part is the same, but in reality, the outer diameter of the driving part is larger than the outer diameter of the working part, or the outer diameter of the driving part is increased. The outer diameter may be smaller than the outer diameter of the working portion, or the driving hole and the working hole may not communicate with each other. In either case, the effect of the present invention is not affected.

In the above embodiment, a retaining groove is provided in each hole wall of the drive hole of the drive unit. However, in practice, it is sufficient to have the retaining grooves in the two hole walls on the facing surfaces thereof to achieve the effect of the present invention, and the present invention can be applied to drive heads of other model numbers. To expand the scope of application of the present invention.

8 and 9 show a retaining joint sleeve 200 according to a second preferred embodiment of the present invention, which includes a drive unit 30 and an action unit 40, as in the above embodiment.
The drive portion 30 has a drive hole 31 extending inward in the axial direction on its end face (that is, a free end face), and the drive hole 31 is a regular quadrilateral hole and extends in the axial direction 4. A guide inclined surface 35 having one hole wall 311 is provided from the top of each hole wall 311 to the end surface of the drive portion 30, and the guide inclined surface 35 is provided so as to be inclined and extended toward the outside. The virtual extension line extending outward and the end face of the driving unit 30 and the angle θ3 are between 40 degrees and 80 degrees. At least two facing hole walls 311 of the drive hole 31 each have a retaining groove 34 recessed in the radial direction.

As shown in FIGS. 8 and 9, the working unit 40 is coaxially connected to the driving unit 30 as an integral unit, and an working hole 41 is axially inside the end face (that is, the free end face) of the working part 40. It is recessed in the direction and extended, and the working hole 41 is a hexagonal hole.

In this embodiment, unlike the combined structure of the first guide inclined surface having two inclinations and the second guide inclined surface disclosed in the first embodiment, the guide inclined surface having a single inclination is shown. However, both have the same effect.

The above is merely a preferred embodiment of the present invention, does not limit the scope of the present invention, and includes all equivalent modifications made by those skilled in the art based on the present invention within the scope of the present invention. ..

1 Sleeve tool 2 Joint 3 Action part 4 Accommodation groove 5 Side surface 6 Bottom surface 7 Polygonal hole 8 Action hole 90 Drive tool 91 Drive head 92 Retainer ring 100 Retaining joint sleeve 10 Drive part 11 Drive hole 111 Hole wall 12 1st guide Inclined surface 13 2nd guide inclined surface 14 Retaining groove 20 Acting part 21 Acting hole 90 Drive tool 91 Drive head 92 Retainer ring 200 Retaining joint sleeve 30 Drive part 31 Drive hole 311 Hole wall 34 Retaining groove 35 Guided inclined surface 40 Action part 41 Action hole

Claims (9)

It is a retaining joint sleeve that has a drive part and an action part.
The drive unit has a plurality of hole walls in which drive holes are recessed inward in the axial direction on the end surface and the drive holes extend in the axial direction, and at least two hole walls located on facing surfaces thereof. A retaining groove recessed in the radial direction is formed in each of the two, and a first guide inclined surface inclined in an annular shape is extended inward in the axial direction on the end surface of the drive portion, and the tip of the first guide inclined surface is extended. Is in contact with the end surface of the drive portion, the outer diameter of the first guide inclined surface is larger than the hole diameter of the drive hole, and between the tip of each hole wall of the drive hole and the bottom end of the first guide inclined surface. A second guide inclined surface is further formed, and the second guide inclined surface is directly adjacent to the first guide inclined surface.
The working part is axially connected to the driving part, and a working hole is recessed and extended in the end face in the axial direction.
Retaining joint sleeve. The retaining joint sleeve according to claim 1, wherein the drive hole is a regular quadrilateral hole and has four hole walls extending in the axial direction. The retaining joint sleeve according to claim 2, wherein each hole wall of the drive hole has one retaining groove. The retaining joint sleeve according to claim 1, wherein the working hole is any one of a quadrangular hole, a hexagonal hole, an octagonal hole, a dodecagonal hole, and a hexagram-shaped hole. The angle between the virtual extension line extending outward from the first guide inclined surface and the end surface of the driving unit is between 15 degrees and 45 degrees, and the virtual extension line extending outward from the second guide inclined surface is used. The retaining joint sleeve according to claim 1, wherein the angle with the end face of the drive portion is between 40 degrees and 80 degrees. It is a retaining joint sleeve that has a drive part and an action part.
The drive unit has a plurality of hole walls in which drive holes are recessed inward in the axial direction on the end surface and the drive holes extend in the axial direction, and at least two hole walls located on facing surfaces thereof. Each of them is formed with a retaining groove recessed in the radial direction, and a guide inclined surface that is inclined and extends from the top of each hole wall to the end surface of the drive portion and becomes larger toward the outside is formed. The angle between the virtual extension line extending outward from the surface and the end surface of the driving unit is between 40 degrees and 80 degrees.
The working part is axially connected to the driving part, and a working hole is recessed and extended in the end face in the axial direction.
Retaining joint sleeve. The retaining joint sleeve according to claim 6, wherein the drive hole is a regular quadrilateral hole and has four hole walls extending in the axial direction. The retaining joint sleeve according to claim 7, wherein each hole wall of the drive hole has one retaining groove. The retaining joint sleeve according to claim 6, wherein the working hole is any one of a quadrangular hole, a hexagonal hole, an octagonal hole, a dodecagonal hole, and a hexagram-shaped hole.

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