Rotary tool socket

Abstract

The present invention provides a sleeve for a rotary tool that prevents a pin connected to an insertion block of a rotary tool from falling off when the rotary tool is assembled or disassembled. The sleeve for the rotary tool is provided with a second groove parallel to a first groove for an O-ring to fit and formed along the circumferential direction on the outer peripheral surface of a connection portion provided to a cylindrical main body portion, and the second groove is formed at a position overlapping with a first through hole when viewed axially, and is formed within a range where an imaginary line from the cylinder axis toward the first through hole is moved by more than ±45 degrees and less than 90 degrees with the cylinder axis as the center.

Description

Technical Field

[0001] The invention relates to a sleeve for a rotating tool. Background Art

[0002] In the past, impact wrenches have been known as rotating tools for tightening bolts, nuts, etc. Impact wrenches are structures in which a socket that is engaged with a bolt or the like can be freely attached and detached. Since the socket is detachable, various sockets have been proposed to prevent the socket from falling off the impact wrench during use of the impact wrench.

[0003] Patent document 1 discloses a sleeve that can be mounted and fixed to a drive shaft of an impact wrench. The sleeve has a barrel portion formed with a mounting hole that engages with the drive shaft, and a pin insertion hole that passes through the barrel portion and reaches the mounting hole. A first groove that surrounds the barrel portion at a position above the pin insertion hole and a second groove that surrounds the barrel portion substantially parallel to the first groove are provided on the outer peripheral surface of the barrel portion. By providing the second groove, an O-ring that engages with the first groove can be moved to the second groove and temporarily placed therein, thereby preventing the O-ring from deviating and falling off from the sleeve, and improving the ease of assembly and disassembly of the sleeve.

[0004] Prior art literature

[0005] Patent Literature

[0006] Patent Document 1: Japanese Patent Application Publication No. 2013-146818 Summary of the invention

[0007] Problem that the invention aims to solve

[0008] In Patent Document 1, when the socket is installed or removed from the impact wrench, the O-ring needs to be moved as a whole from the groove to insert or remove the pin. The through hole for inserting the pin is opened on the left and right sides of the main shaft, so if the O-ring is moved from the groove, the openings on both sides are exposed. In this way, when the pin is pulled out, for example, if the O-ring is moved as a whole with one opening of the through hole facing downward, there is a problem that the pin may fall from the downward opening, which reduces the work efficiency.

[0009] Therefore, one of the objects of the present invention is to provide a socket for a rotary tool which prevents a pin for coupling to an insert block of a rotary tool from falling off when attaching or detaching the rotary tool.

[0010] Solutions for solving problems

[0011] The present invention is a sleeve for a rotary tool, which has a cylindrical main body, a sleeve portion at one end of the cylindrical main body, and a connecting portion for connecting a rotary tool at the other end, wherein the connecting portion has: an insertion hole formed along the cylindrical axis of the main body, into which an insertion block of the rotary tool can be inserted; a first groove formed in an annular shape on the outer peripheral surface of the connecting portion along the circumferential direction centered on the cylindrical axis; a first through hole that penetrates from the insertion hole to the first groove along the radial direction of the cylindrical axis; and a second The through hole is formed at a position on the side opposite to the first through hole with the cylinder axis as the center when viewed axially along the cylinder axis, and penetrates from the insertion hole to the first groove along the radial direction, the insertion block is inserted into the insertion hole in such a way that a pin insertion hole located in the insertion block forms a series of holes with the first through hole and the second through hole, a pin is inserted into the series of holes, an O-ring is engaged with the first groove, and thus the sleeve for the rotary tool is connected to the insertion block, in which,

[0012] A second groove parallel to the first groove and formed along the circumferential direction is provided in the outer peripheral surface of the connecting portion,

[0013] From the axial point of view,

[0014] The second groove is formed at a position overlapping with the first through hole and is formed within a range where an imaginary line from the cylinder axis toward the first through hole is shifted by ±45 degrees or more and less than 90 degrees with the cylinder axis as the center.

[0015] Effects of the Invention

[0016] According to the present invention, it is possible to prevent the pin for coupling with the insertion block of the rotation tool from falling when attaching or detaching the rotation tool. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram showing a socket and an impact wrench according to an embodiment.

[0018] Figure 2 is a side view of the sleeve.

[0019] Figure 3 It is a top view of the sleeve.

[0020] Figure 4 yes Figure 3 Cross-sectional view at line IV-IV.

[0021] Figure 5 yes Figure 3 Cross-sectional view at line VV of FIG.

[0022] Figure 6It is a side view of the sleeve with the O-ring fitted.

[0023] Figure 7 It is a top view of the sleeve with the O-ring fitted.

[0024] Figure 8 It is a diagram for explaining the formation position of the second groove.

[0025] Fig. 9 This is a diagram showing a state where the O-ring is temporarily placed in the second groove.

[0026] Fig.10 This is a diagram showing a state where the O-ring is temporarily placed in the second groove.

[0027] Fig.11 This is a diagram showing the procedure for attaching and fixing the socket to the impact wrench.

[0028] Description of Reference Numerals

[0029] 1. Sleeve; 2. O-ring; 10. Cylinder; 10A. Insertion port; 10B. Sleeve portion; 11. First groove; 11A, 11B, recessed portion; 12. Second groove; 13. Third groove; 15A, First through hole; 15B, Second through hole; 16. Wall; 17. Wall; 50. Impact wrench; 51. Insertion block; 52. Pin insertion port; 53. Pin. DETAILED DESCRIPTION

[0030] Hereinafter, an embodiment of the present invention will be described with reference to the accompanying drawings. Hereinafter, an impact wrench will be cited as an example of a rotary tool with a detachable rotary tool socket (hereinafter referred to as a socket). However, the rotary tool with a detachable socket may be a manual wrench or an impact screwdriver.

[0031] [For impact wrenches]

[0032] Figure 1 1 is a schematic diagram showing a socket 1 and an impact wrench 50 according to the present embodiment. Figure 1 , the portion surrounded by the circle is shown enlarged.

[0033] The impact wrench 50 rotates a rotating shaft by supplying electric power to a motor. The impact wrench 50 includes a convex insertion block 51 that rotates according to the rotation of the rotating shaft.

[0034] The insertion block 51 is in the shape of a chamfered quadrangular prism, and pin insertion holes 52 are formed on two parallel side surfaces. In addition, pin insertion holes may also be formed on the upper and lower surfaces that are orthogonal to the two side surfaces. In addition, for the convenience of explanation, the surface on which the pin insertion hole 52 is formed is referred to as the side surface, but since the insertion block 51 rotates, the side surface and the upper and lower surfaces are not specified. The pin insertion hole 52 is a through hole for inserting a pin (not shown) in order to connect the sleeve 1 described later to the insertion block 51. The sleeve 1 connected to the insertion block 51 rotates due to the rotation of the insertion block 51. The specific structure of the interior of the impact wrench 50 is the same as that of a conventional impact wrench, and therefore a detailed description is omitted.

[0035] [Specific structure of the sleeve]

[0036] Hereinafter, the specific structure of the sleeve 1 will be described in detail.

[0037] Figure 2 It is a side view of the sleeve 1. Figure 3 It is a top view of the sleeve 1. Figure 4 yes Figure 3 Cross-sectional view at line IV-IV. Figure 5 yes Figure 3 In addition, for the convenience of explanation, Figure 2 Set to side view, Figure 3 Although it is a top view, since the sleeve 1 is cylindrical, the upper surface and the side surface of the sleeve 1 are not limited. Figure 5 In order to make it easier to understand the positional relationship between the components, components that are not visible in the cross section at line VV (a first through hole 15A and a second through hole 15B described later) are indicated by dotted lines.

[0038] The sleeve 1 includes a cylindrical main body 10 centered on the central axis P. A connecting portion 10A to which the rotary tool 50 is connected is provided at a first end of the main body 10, and a sleeve 10B is provided at a second end. The sleeve 10B has a hole for inserting a bolt or a nut. The structure of the sleeve 10B is not particularly limited, and therefore, its description is omitted.

[0039] Hereinafter, the direction along the central axis P is referred to as an axial direction, and the circumferential direction and the radial direction are directions centered on the central axis P, respectively.

[0040] The connection portion 10A has an insertion hole 10C, a first groove 11 , a first through hole 15A, and a second through hole 15B.

[0041] The insertion hole 10C, into which the insertion block 51 is inserted, is formed along the cylindrical axis (central axis P) of the main body portion 10 .

[0042] The first groove 11 is formed in an annular shape along the circumferential direction on the outer peripheral surface of the main body portion 10 .

[0043] The first through hole 15A is formed to penetrate from the insertion hole 10C to the first groove 11 in the radial direction. The second through hole 15B is formed at a position on the opposite side of the first through hole 15A with the center axis P as the center when viewed in the radial direction, and is formed to penetrate from the insertion hole 10C to the first groove 11 in the radial direction. The first through hole 15A and the second through hole 15B have a size that a pin to be inserted into the pin insertion hole 52 of the insertion block 51 can be inserted.

[0044] When the sleeve 1 is mounted and fixed to the impact wrench 50, the insert block 51 is inserted into the insertion hole 10C of the sleeve 1 so that the pin insertion hole 52 of the insert block 51 overlaps with the first through hole 15A and the second through hole 15B, thereby forming a series of holes along the radial direction. Then, the pin is inserted into the series of holes. Figure 1 ) is engaged with the first groove 11 to prevent the pins inserted into the series of holes from falling out.

[0045] Figure 6 It is a side view of the sleeve 1 in which the O-ring 2 is fitted. Figure 7 1 is a top view of a sleeve 1 in which an O-ring 2 is fitted. The O-ring 2 and the pin described below may be components provided by the sleeve 1 or may be general components that can be shared with other sleeves. The O-ring 2 is formed of, for example, fluororubber, polyurethane rubber, silicone rubber, or nitrile rubber.

[0046] The O-ring 2 is fitted into the first groove 11 in a manner to block the first through hole 15A and the second through hole 15B. The O-ring 2 is moved from the first groove 11 to expose the first through hole 15A or the second through hole 15B, which will be described in detail later. Thus, the pin can be inserted and removed from the first through hole 15A or the second through hole 15B.

[0047] The depth of the first groove 11 is set to a depth such that the O-ring 2 protrudes radially from the first groove 11 when the O-ring 2 is fitted therein. The depth is set so that the O-ring 2 is unlikely to deviate from the first groove 11. Specifically, the depth is set so that the O-ring 2 does not deviate from the first groove 11 due to vibration when the impact wrench 50 is used, but the O-ring 2 can be moved from the first groove 11 by hand.

[0048] The second groove 12 and the third groove 13 are also formed at the first end of the main body 10. The second groove 12 and the third groove 13 are formed on the outer peripheral surface of the main body 10 in parallel with the first groove 11 along the circumferential direction. In addition, the second groove 12 and the third groove 13 are formed so as to be located at the same position in the axial direction and on the same circumference. In addition, in the present embodiment, the first groove 11, the second groove 12 and the third groove 13 are formed in this order from the first end side of the main body 10. However, the formation order of the first groove 11, the second groove 12 and the third groove 13 may be reversed.

[0049] Here, use Figure 8 Next, the formation positions of the second groove 12 and the third groove 13 will be described. Figure 8 This is a diagram for explaining the formation position of the second groove 12. Figure 8 This is a diagram viewed from the axial direction.

[0050] The second groove 12 is formed at a position overlapping with the first through hole 15A when viewed from the axial direction. In addition, the second groove 12 is formed in a range when the imaginary line 16 from the central axis P toward the first through hole 15A is moved by more than ±45 degrees and less than 90 degrees with the central axis P as the center. In addition, the formation position of the third groove 13 is also the same. Although not shown, the third groove 13 is formed at a position overlapping with the second through hole 15B when viewed from the axial direction. In addition, the third groove 13 is formed in a range when the imaginary line 16 from the central axis P toward the second through hole 15B is moved by more than ±45 degrees and less than 90 degrees with the central axis P as the center. In addition, the third groove 13 may not be provided.

[0051] The second groove 12 is a groove in which the O-ring 2 is temporarily placed when the O-ring 2 is moved from the first groove 11 in order to expose the first through hole 15A blocked by the O-ring 2. The third groove 13 is a groove in which the O-ring 2 is temporarily placed when the O-ring 2 is moved from the first groove 11 in order to expose the second through hole 15B blocked by the O-ring 2. Temporary placement of the O-ring 2 will be described below.

[0052] Fig. 9 and Fig.10 This is a diagram showing a state where the O-ring 2 is temporarily placed in the second groove 12 . Fig. 9 is equivalent to Figure 2 and Figure 4 Side view of Fig.10 is equivalent to Figure 3 and Figure 5 In addition, the second groove 12 will be described below. The third groove 13 is the same as the second groove 12, so its description is omitted.

[0053] If a portion of the O-ring 2 covering the first through hole 15A is pushed toward the second groove 12 by the operator's finger, a portion of the O-ring 2 passes over the wall of the first groove 11 and fits into the second groove 12. A portion of the O-ring 2 fits into the second groove 12A (is temporarily placed in the second groove 12A), so that even if the operator removes his finger, the portion of the O-ring 2 can be prevented from returning to the first groove 11. As a result, the first through hole 15A becomes exposed, so the operator can insert and remove the pin relative to the first through hole 15A. In addition, at this time, the second through hole 15B is blocked by the O-ring 2, so the pin can be prevented from falling out of the second through hole 15B.

[0054] After the pin is inserted and removed from the first through hole 15A, a portion of the O-ring 2 temporarily placed in the second groove 12 is pushed toward the first groove 11 by the operator's finger, so that the O-ring 2 fits into the first groove 11, and the first through hole 15A and the second through hole 15B are blocked by the O-ring 2. When the pin is inserted, the O-ring 2 blocks the first through hole 15A and the second through hole 15B, thereby preventing the pin from falling out. In addition, the second groove 12 is a groove for temporarily placing the O-ring 2, and the depth of the second groove 12 is preferably greater than the depth of the first groove 11, so that the O-ring 2 temporarily placed in the second groove 12 does not return to the first groove 11 (see Figure 3 ). The wall of the first groove on the second groove side of the portion of the first groove located at a position overlapping with the second groove (the portion indicated by reference numeral A) is lower than the wall of the portion located at a position not overlapping with the second groove (the portion indicated by reference numeral B).

[0055] [Disassembly and assembly of the sleeve]

[0056] Next, attachment and detachment of the socket 1 with respect to the impact wrench 50 will be described. Fig.11 1 is a diagram showing the sequence of attaching and fixing the socket 1 to the impact wrench 50. As a premise, it is assumed that the O-ring 2 is fitted into the first groove 11. Fig. 9 and Fig.10 Similarly to the description in , it is assumed that the first through hole 15A is exposed.

[0057] When the socket 1 is mounted and fixed to the impact wrench 50, first, a portion of the O-ring 2 that blocks the first through hole 15A is moved toward the second groove 12 and temporarily placed in the second groove 12. In this state, the insertion block 51 is inserted into the insertion port 10A of the socket 1 so that the pin insertion hole 52 of the insertion block 51 overlaps with the first through hole 15A and the second through hole 15B of the socket 1. Fig.11 (A)).

[0058] Next, the pin 53 is inserted from the first through hole 15A ( Fig.11 (B)). At this time, the second through hole 15B is blocked by the O-ring 2, so the pin 53 inserted from the first through hole 15A is prevented from falling out of the second through hole 15B. As a result, the pin 53 is inserted into the pin insertion hole 52 of the insertion block 51, the first through hole 15A, and the second through hole 15B.

[0059] Finally, a portion of the O-ring 2 temporarily placed in the second groove 12 is moved toward the first groove 11 and is fitted into the first groove 11 ( Fig.11 (C)). The inserted pin 53 is prevented from falling out of the pin insertion hole 52, the first through hole 15A and the second through hole 15B by the O-ring 2, and the socket 1 is connected to the insertion block 51. Thus, the socket 1 is fixed to the impact wrench 50.

[0060] The order of removing the socket 1 fixed to the impact wrench 50 is opposite to the above order. That is, a part of the O-ring 2 that seals the first through hole 15A of the socket 1 fixed to the impact wrench 50 is moved to the second groove 12 side and temporarily placed in the second groove 12. As a result, the first through hole 15A is exposed. In this state, the pin 53 is pulled out. At this time, the second through hole 15B is blocked by the O-ring 2, so that the pin 53 can be prevented from falling out of the second through hole 15B. By pulling out the pin 53, the connection between the socket 1 and the insertion block 51 can be released. As a result, the socket 1 can be removed from the impact wrench 50.

[0061] As described above, the socket 1 of the present embodiment can be attached to and detached from the impact wrench 50 while preventing the pin 53 for coupling to the insertion block 51 of the impact wrench 50 from falling.

Claims

1. A sleeve for a rotary tool, comprising a cylindrical main body, a sleeve portion provided at one end of the cylindrical main body, and a connection portion for connecting a rotary tool provided at the other end. The connecting portion has: An insertion hole, formed along the cylindrical axis of the main body, into which an insertion block of the rotary tool can be inserted; A first groove formed in an annular shape on the outer peripheral surface of the connecting portion along the circumferential direction centered on the axis of the cylinder; a first through hole extending from the insertion hole to the first groove along a radial direction of the cylinder axis; and a second through hole formed at a position on the opposite side of the first through hole with the cylinder axis as the center when viewed in the axial direction along the cylinder axis, and penetrating from the insertion hole to the first groove along the radial direction, The insertion block is inserted into the insertion hole in such a manner that the pin insertion hole of the insertion block forms a series of holes with the first through hole and the second through hole, a pin is inserted into the series of holes, and an O-ring is engaged with the first groove, thereby connecting the sleeve for a rotary tool to the insertion block. In the sleeve for a rotary tool, A second groove parallel to the first groove and formed along the circumferential direction is provided in the outer peripheral surface of the connecting portion, From the axial point of view, The second groove is formed at a position overlapping with the first through hole and is formed within a range where an imaginary line from the cylinder axis toward the first through hole is shifted by ±45 degrees or more and less than 90 degrees with the cylinder axis as the center.

2. The sleeve for a rotary tool according to claim 1, wherein: The depth of the second groove is greater than or equal to the depth of the first groove.

3. The sleeve for a rotary tool according to claim 1 or 2, wherein: From the axial direction along the axis of the cylinder, A wall of a portion of the first groove at a position overlapping with the second groove on the second groove side is lower than a wall of a portion of the first groove at a position not overlapping with the second groove.

4. The sleeve for a rotary tool according to claim 1 or 2, wherein: A third groove parallel to the first groove and formed along the circumferential direction is provided in the outer peripheral surface of the connecting portion, From the axial direction along the axis of the cylinder, The third groove is formed to overlap with the second through hole and is formed within a range where an imaginary line from the cylinder axis toward the second through hole is shifted by ±45 degrees or more and less than 90 degrees with the cylinder axis as the center.

5. The socket for a rotary tool according to claim 3, wherein: A third groove parallel to the first groove and formed along the circumferential direction is provided in the outer peripheral surface of the connecting portion, From the axial direction along the axis of the cylinder, The third groove is formed to overlap with the second through hole and is formed within a range where an imaginary line from the cylinder axis toward the second through hole is shifted by ±45 degrees or more and less than 90 degrees with the cylinder axis as the center.

Images