TWI815534B - Sockets for rotary tools - Google Patents

Abstract

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

Description

Sockets for rotary tools

The present invention relates to a sleeve for a rotary tool.

Conventionally, impact wrenches are known as rotation tools for tightening bolts, nuts, etc. The impact wrench has a structure in which a sleeve for fitting bolts and the like can be freely attached and detached. The socket is detachable, and therefore, various sockets have been proposed to prevent the socket from being detached from the impact wrench during use.

Patent Document 1 discloses a sleeve that can be attached and fixed to a drive shaft of an impact wrench. The sleeve has a cylindrical portion formed with a mounting hole that fits the drive shaft, and a pin insertion hole that penetrates the cylindrical portion and reaches the mounting hole. The outer peripheral surface of the cylindrical portion is provided with a first groove surrounding the cylindrical portion at a position above the pin insertion hole and a second groove surrounding the cylindrical portion substantially parallel to the first groove. By providing the second groove, the O-ring fitted to the first groove can be moved to the second groove and temporarily placed. Therefore, it is possible to prevent the O-ring from being displaced and falling off from the sleeve, etc. , which can improve the disassembly and assembly operability of the sleeve.

[Prior technical literature] [Patent Document]

Patent Document 1: Japanese Patent Application Publication No. 2013-146818

In Patent Document 1, when attaching and detaching the socket to the impact wrench, it is necessary to move the entire O-ring seal from the groove to insert and remove the pin. The through hole into which the pin is inserted opens on the left and right sides of the main body shaft. Therefore, if the O-ring is moved from the groove, the openings on the left and right sides are exposed. In this way, for example, when pulling out a pin, if the entire O-ring is moved with one opening of the through hole facing downward, there is a problem that the pin may fall from the downward opening, and the work efficiency will be reduced. .

Therefore, one object of the present invention is to provide a sleeve for a rotary tool that prevents a pin connected to an insertion block of the rotary tool from falling when the rotary tool is attached or detached.

The present invention is a sleeve for a rotary tool, which has a cylindrical main body portion. The cylindrical main body portion is provided with a sleeve portion at one end and a connecting portion for connecting the rotating tool at the other end. The connecting portion It has: an insertion hole formed along the cylindrical axis of the main body part into which the insertion block of the rotary tool can be inserted; and a first groove formed on the outer peripheral surface of the connecting part along the circumferential direction centered on the cylindrical axis. It is annular; the first through hole penetrates from the insertion hole to the first groove along the radial direction of the cylindrical axis; and the second through hole is in the shape of the circle when viewed in the axial direction along the cylindrical axis. The cylinder axis is formed at a position opposite to the first through hole as the center, and penetrates from the insertion hole to the first groove along the radial direction, so that The pin insertion hole located in the above-mentioned insertion block forms a series of holes with the above-mentioned first through-hole and the above-mentioned second through-hole. Insert the above-mentioned insertion block into the above-mentioned insertion hole, insert the pin into the above-mentioned series of holes, and make the O-ring seal and the above-mentioned The first groove is fitted so that the rotary tool sleeve is connected to the insertion block. In the rotary tool sleeve, a groove parallel to the first groove and formed in the circumferential direction is provided on the outer peripheral surface of the connecting portion. The second groove is formed at a position overlapping the first through hole when viewed from the axial direction, and is formed so that an imaginary line from the axis of the cylinder toward the first through hole is aligned with the cylinder. The axis is within the range when the center moves more than ±45 degrees and less than 90 degrees.

According to the present invention, it is possible to prevent the pin for connecting the insertion block of the rotary tool from falling when the rotary tool is attached or detached.

1: Sleeve

2: O-ring seal

10: Main part

10A:Connection part

10B: Sleeve part

10C: Insertion hole

11: Slot 1

11A,11B: concave part

12:Slot 2

13:Slot 3

15A: 1st through hole

15B: 2nd through hole

16: Imaginary line

50:Impact wrench

51:Insert block

52: Pin insertion port

53:pin

P: central axis

A:Wall

B: wall

[Fig. 1] is a schematic diagram showing a socket and an impact wrench according to the embodiment.

[Fig. 2] is a side view of the sleeve.

[Fig. 3] is a top view of the sleeve.

[Fig. 4] is a cross-sectional view taken along line IV-IV in Fig. 3. [Fig.

[Fig. 5] is a cross-sectional view taken along the V-V line in Fig. 3. [Fig.

[Fig. 6] is a side view of the sleeve fitted with an O-ring.

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

[Fig. 8] is a diagram for explaining the formation position of the second groove.

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

[Fig. 10] is a diagram showing a state in which the O-ring seal is temporarily placed in the second groove.

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

Hereinafter, one embodiment of the present invention will be described with reference to the drawings. Hereinafter, an impact wrench will be described as an example of a rotary tool in which a rotary tool sleeve (hereinafter simply referred to as a sleeve) is detachable. However, the rotary tool with a removable sleeve can be either a manual wrench or an impact screwdriver.

[For impact wrenches]

FIG. 1 is a schematic diagram showing the socket 1 and impact wrench 50 according to this embodiment. In FIG. 1 , a portion surrounded by a circle is shown enlarged.

The impact wrench 50 supplies electric power to a motor to rotate the rotation shaft using the motor. The impact wrench 50 includes a convex insertion block 51 that rotates according to the rotation of the rotation shaft.

The insertion block 51 has a chamfered square prism shape, and pin insertion holes 52 are formed on both parallel side surfaces. In addition, the upper and lower sides orthogonal to both sides may also be Pin insertion holes are also formed on the surface. In addition, for convenience of explanation, the surface where the pin insertion hole 52 is formed is called a side surface. However, 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 to be described later and the insertion block 51 . The sleeve 1 connected to the insertion block 51 rotates as the insertion block 51 rotates. The specific internal structure of the impact wrench 50 is the same as that of a conventional impact wrench, and therefore a detailed description is omitted.

[For the specific structure of the sleeve]

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

FIG. 2 is a side view of the sleeve 1 . FIG. 3 is a top view of the sleeve 1 . FIG. 4 is a cross-sectional view taken along line IV-IV in FIG. 3 . FIG. 5 is a cross-sectional view taken along line V-V in FIG. 3 . In addition, for convenience of explanation, FIG. 2 is a side view and FIG. 3 is a top view. However, since the sleeve 1 is cylindrical, the upper surface and side surfaces of the sleeve 1 are not limited. In addition, in FIG. 5 , in order to easily understand the positional relationship between the constituent parts, the constituent parts that are not visible in the cross section along the V-V line (the first through-hole 15A and the second through-hole 15B to be described later) are shown with dotted lines.

The sleeve 1 includes a cylindrical main body portion 10 centered on the central axis P. A connection part 10A to which the rotary tool 50 is connected is provided at the first end of the main body part 10, and a sleeve part 10B is provided at the second end. The sleeve part 10B has a hole into which a bolt, a nut, etc. are inserted. The structure of the sleeve part 10B is not particularly limited, and therefore its description is omitted.

Hereinafter, the direction along the central axis P will be referred to as the axial direction, and the circumferential direction and the radial direction are respectively directions centered on the central axis P.

The connection part 10A has the insertion hole 10C, the 1st groove 11, the 1st through hole 15A, and the 2nd through hole 15B.

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

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

The first through hole 15A is formed to pass through the first groove 11 from the insertion hole 10C in the radial direction. The second through hole 15B is formed at a position opposite to the first through hole 15A with the central 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 allows the pins to be inserted into the pin insertion holes 52 of the insertion block 51 to be inserted.

When the socket 1 is fixed to the impact wrench 50, the insertion block 51 is inserted into the socket so that the pin insertion hole 52 of the insertion block 51 and the first through hole 15A and the second through hole 15B overlap. 1 is inserted into the hole 10C to form a series of holes along the radial direction. Then, insert pins into the series of holes. The O-ring 2 (see Figure 1) is fitted into the first groove 11 to prevent the pin inserted into the series of holes from falling off.

Figure 6 is a side view of the sleeve 1 fitted with the O-ring 2. FIG. 7 is a top view of the sleeve 1 in which the O-ring 2 is fitted. The O-ring seal 2 and the pin described below may be components provided in the sleeve 1 or may be general-purpose components that can be shared with other sleeves. The O-ring seal 2 is made of, for example, fluorine rubber, polyurethane rubber, silicone rubber, or nitrile rubber.

The O-ring 2 seals the first through hole 15A and the second through hole 15B. The way is to fit into the first groove 11. The O-ring seal 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. This allows the pin to be inserted and removed from the first through hole 15A or the second through hole 15B.

In addition, the depth of the first groove 11 is set to a depth such that the O-ring 2 protrudes from the first groove 11 in the radial direction when the O-ring 2 is fitted. In addition, this depth is set so that the O-ring seal 2 is unlikely to deviate from the first groove 11 . Specifically, it is set so that the O-ring seal 2 will not deviate from the first groove 11 due to vibration when the impact wrench 50 is used, but the O-ring seal 2 can be moved from the first groove 11 by human hands.

A second groove 12 and a third groove 13 are also formed in the first end of the main body 10 . The second groove 12 and the third groove 13 are formed in the outer peripheral surface of the main body 10 in the circumferential direction in parallel with the first groove 11 . In addition, the second groove 12 and the third groove 13 are formed to be located at the same position in the axial direction and on the same circumference. In addition, in this 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.

Here, the formation positions of the second groove 12 and the third groove 13 will be described using FIG. 8 . FIG. 8 is a diagram for explaining the formation position of the second groove 12 . Fig. 8 is a view viewed from the axial direction.

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

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 . In addition, the third groove 13 is a groove that temporarily accommodates the O-ring seal 2 when the O-ring seal 2 is moved from the first groove 11 in order to expose the second through-hole 15B blocked by the O-ring seal 2 . Mount. Hereinafter, the temporary placement of the O-ring seal 2 will be described.

FIGS. 9 and 10 are diagrams showing a state in which the O-ring seal 2 is temporarily placed in the second groove 12 . FIG. 9 is a side view equivalent to FIGS. 2 and 4 , and FIG. 10 is a top view equivalent to FIGS. 3 and 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.

When a part of the O-ring 2 covering the first through hole 15A is pressed toward the second groove 12 side by the operator's finger, a part of the O-ring 2 passes over the wall of the first groove 11 and connects with the second groove 12 . Slot 12 fits. A part of the O-ring 2 is fitted into the second groove 12A (temporarily placed in the second groove 12A), so that even if the operator removes his fingers, a part of the O-ring 2 can be prevented from returning to the first groove 11 . Thereby, the 1st through hole 15A becomes an exposed state, Therefore, an operator can insert and remove a pin with respect to the 1st through hole 15A. In addition, at this time, since the second through hole 15B is blocked by the O-ring 2, it is possible to prevent the pin from coming off the second through hole 15B.

After completing the insertion and removal of the pin with respect to the first through hole 15A, the temporary placement A part of the O-ring seal 2 reaching the second groove 12 is pushed toward the first groove 11 side by the operator's finger, so that the O-ring seal 2 is fitted into the first groove 11, and the first through-hole 15A and the second through-hole 15A are Hole 15B is blocked by O-ring 2. When the pin is inserted, the O-ring seal 2 blocks the first through hole 15A and the second through hole 15B to prevent the pin from coming off. In addition, the second groove 12 is a groove for temporarily placing the O-ring 2. It is preferable that the depth of the second groove 12 is greater than the depth of the first groove 11 so that the O-ring of the second groove 12 can be temporarily placed. The sealing ring 2 does not return to the first groove 11 (see Fig. 3). The wall of the first groove on the side of the second groove (the portion indicated by reference numeral A) is larger in the portion of the first groove that overlaps with the second groove than in the portion that does not overlap with the second groove. The wall (the part indicated by reference mark B) is low.

[For disassembly and assembly of the sleeve]

Next, the attachment and detachment of the socket 1 to the impact wrench 50 will be described. FIG. 11 is a diagram showing the procedure for attaching and fixing the socket 1 to the impact wrench 50 . As a premise, it is assumed that the O-ring seal 2 is fitted into the first groove 11 . In addition, it is assumed that the first through hole 15A is exposed similarly to the description in FIGS. 9 and 10 .

When attaching and fixing the sleeve 1 to the impact wrench 50 , first, a part of the O-ring seal 2 that blocks the first through hole 15A is moved to the second groove 12 side and is temporarily placed in the second groove 12 . In this state, the insertion block 51 is inserted into the connection portion 10A of the sleeve 1 ((( in FIG. 11 )) 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 sleeve 1 A)).

Next, the pin 53 is inserted from the first through hole 15A (Fig. 11(B)). this , the second through hole 15B is in a state of being blocked by the O-ring 2 , so the pin 53 inserted through the first through hole 15A can be prevented from falling off the second through hole 15B. Thereby, the pin 53 is inserted into a series of holes including the pin insertion hole 52 of the insertion block 51 , the first through hole 15A, and the second through hole 15B.

Finally, a part of the O-ring 2 temporarily placed on the second groove 12 is moved to the first groove 11 side and fitted into the first groove 11 ((C) in FIG. 11). The inserted pin 53 is prevented from coming off from the pin insertion hole 52 , the first through hole 15A, and the second through hole 15B by the O-ring 2 , and the sleeve 1 is connected to the insertion block 51 . Thereby, the sleeve 1 is installed and fixed to the impact wrench 50 .

The order of removing the socket 1 fixed to the impact wrench 50 is reverse to the above-mentioned order. That is, a part of the O-ring 2 that blocks the first through hole 15A of the sleeve 1 fixed to the impact wrench 50 is moved toward the second groove 12 side and is 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, since the second through hole 15B is blocked by the O-ring 2, the pin 53 can be prevented from falling off the second through hole 15B. By pulling out the pin 53, the connection between the sleeve 1 and the insertion block 51 can be released. Thereby, the socket 1 can be detached from the impact wrench 50 .

As described above, the socket 1 of the present embodiment can prevent the pin 53 connected to the insertion block 51 of the impact wrench 50 from falling, and can achieve attachment and detachment to the impact wrench 50 at the same time.

1: Sleeve

10: Main part

10C: Insertion hole

12:Slot 2

13:Slot 3

15A: 1st through hole

15B: 2nd through hole

16: Imaginary line

P: central axis

Claims (5)

A sleeve for a rotating tool, which is provided with a cylindrical main body. The cylindrical main body is provided with a sleeve part at one end and a connecting part for connecting the rotating tool at the other end. The connecting part has: an insertion The hole is formed along the cylindrical axis of the main body part, and the insertion block of the above-mentioned rotating tool can be inserted; the first groove is formed in an annular shape on the outer peripheral surface of the connecting part along the circumferential direction centered on the cylindrical axis. ; a first through hole penetrating from the insertion hole to the first groove along the radial direction of the cylindrical axis; and a second through hole extending from the cylindrical axis when viewed in the axial direction along the cylindrical axis; The center is formed at a position on the opposite side to the first through-hole, and penetrates from the insertion hole to the first groove in the radial direction, so that the pin insertion hole located in the insertion block is connected to the first through-hole and the above-mentioned first through-hole. Insert the above-mentioned insertion block into the above-mentioned insertion hole in such a manner that the second through-hole forms a series of holes, insert the pin into the above-mentioned series of holes, and fit the O-ring to the above-mentioned first groove, so that the sleeve for the rotary tool is connected to the above-mentioned insertion hole. Block connection, in this rotary tool sleeve, a second groove formed parallel to the first groove and formed in the circumferential direction is provided in the outer peripheral surface of the above-mentioned connection part, and the above-mentioned second groove is formed when viewed from the above-mentioned axial direction. It is formed at a position overlapping the first through hole and in a virtual direction from the axis of the cylinder toward the first through hole. The line moves within the range of ±45 degrees and less than 90 degrees with the above-mentioned cylinder axis as the center. The socket 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. The sleeve for a rotary tool according to claim 1 or 2, wherein the first groove is located in a portion of the first groove that overlaps the second groove when viewed in an axial direction along the cylindrical axis. The wall on the side of the second groove is lower than the wall of the portion located not overlapping the second groove. The sleeve for a rotary tool according to claim 1 or 2, wherein a third groove formed in a circumferential direction parallel to the first groove is provided in the outer peripheral surface of the connecting portion, extending from a groove along the axis of the cylinder. The third groove is formed so as to overlap with the second through hole when viewed in the axial direction, and is formed so that an imaginary line extending from the cylindrical axis toward the second through hole is shifted by ±45 degrees with the cylindrical axis as the center. Above and below 90 degrees. The sleeve for a rotary tool according to claim 3, wherein a third groove formed in a circumferential direction parallel to the first groove is provided in the outer peripheral surface of the connecting portion, The third groove is formed so as to overlap the second through hole when viewed in an axial direction along the cylindrical axis, and is formed so that an imaginary line from the cylindrical axis toward the second through hole is aligned with the cylindrical axis. The axis is within the range when the center moves more than ±45 degrees and less than 90 degrees.

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