JP2008173710A - Socket mechanism - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide technology for mounting tools having different diameters freely by one socket mechanism. <P>SOLUTION: A main body part 87 of the socket mechanism 10B is provided with: a first hexagonal hole 42B fitting a shank part of the first bar-like tool; a second hexagonal hole 43B provided in the innermost part of the first hexagonal hole 42B and fitting a shank part of the second bar-like tool having smaller diameter than that of the first bar-like tool; and a rubber ball 49 preventing the first and second bar-like tools from coming off by pressing them. The tools having different diameters is thereby freely mounted by one socket mechanism 10B to improve efficiency of the fastening work. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an improvement in a socket mechanism that is provided at the tip of a rotating spindle of a tool rotating means and that can be mounted so that a rod-shaped tool can be replaced.

In assembly of a vehicle or the like, a tightening device such as an impact wrench is used to tighten a large number of bolts and screws. At this time, since many types of bolts and screws having different sizes are prepared, it is necessary to change the tool every time the size changes.
In order to save the time and effort, a tightening device has been proposed in which a plurality of tools can be switched with a single tool axis (see, for example, Patent Document 1).
JP 2000-218557 A (FIG. 2)

Patent document 1 is demonstrated based on the following figure.
FIG. 10 is a diagram for explaining the basic principle of the prior art. In FIG. 10A, the tightening device 100 fits a hexagonal bar-shaped tool shaft 102 into a socket mechanism 101 connected to a drive source. A wrench 103 is fitted to the tip of a hexagonal bar-shaped tool shaft 102. The hex bolt 104 can be tightened with the wrench 103.

  At (b), the wrench 103 is retracted to expose the driver bit 105 formed at the tip of the hexagonal bar-shaped tool shaft 102. With this driver bit 105, the cross-recessed machine screw 106 can be tightened.

  However, if the cross-recessed machine screw 107 having a diameter larger than that of the cross-recessed machine screw 106 is to be tightened with the tool shaft 102 in (c), the tightening torque may be insufficient. In this case, it is desirable to replace the tool shaft 102 with a large-diameter hexagonal bar-shaped tool shaft 108. However, in order to mount the tool shaft 108, it is necessary to replace the socket mechanism 101 with a large-diameter socket mechanism 109.

  As described above, in the tightening device 100 of Patent Document 1, it is necessary to change the diameter of the socket mechanism in accordance with the diameter of the tightening member, and to replace the socket mechanism mounted on the tightening device each time. This may significantly reduce the work efficiency of the tightening work.

  In order to solve the above problems, it is required to develop a technique capable of freely mounting tools having different diameters with a single socket mechanism.

  This invention makes it a subject to provide the technique which can mount | wear the tool of a different diameter freely with one socket mechanism.

  According to the first aspect of the present invention, a rod-shaped tool is replaceably mounted on a tool rotating means that includes a gripping portion, has a built-in driving source such as a motor, and projects one end of a rotating spindle that is rotated by the driving source. A socket mechanism that is provided at a tip of the rotary spindle and grips a base portion of the rod-shaped tool, and a first shank portion of the first rod-shaped tool is fitted into the socket mechanism. A polygonal hole, a second polygonal hole that is provided at the back of the first polygonal hole and has a smaller diameter than the first rodlike tool, and the second polygonal hole that fits into the first polygonal hole; And a tool retaining member for retaining the rod-shaped tool by pressing the second rod-shaped tool and the second rod-shaped tool.

  The invention according to claim 2 is characterized in that the first bar-shaped tool and the second bar-shaped tool are driver bits.

  In the invention according to claim 3, the socket mechanism includes a socket body member coupled to the rotation main shaft, a rotation member housed in the socket body member so as to be idled, and the rotation member and the socket body member between the rotation member and the socket body member. A unidirectional rotating mechanism that applies a rotational force to the rotating member when the socket body member rotates in the tightening direction and does not apply a rotational force to the rotating member when the socket body member rotates in the loosening direction. Thus, the socket body member is provided with a first polygonal hole, and the rotating member is provided with a second polygonal hole.

  In the invention according to claim 1, the first polygonal hole into which the first bar-shaped tool is fitted and the second bar-shaped tool having a smaller diameter than the first bar-shaped tool are fitted into the socket mechanism. Polygonal holes. Therefore, tools with different diameters can be freely mounted with a single socket mechanism. Therefore, the work efficiency of the tightening work can be improved.

  In addition, since the socket mechanism is provided with a tool retaining member, the rod tool can be prevented from coming off by pressing the rod tool with the tool retaining member. Thereby, since the tightening operation is stabilized, a socket mechanism with improved workability can be provided.

  In the invention according to claim 2, since the first bar-shaped tool and the second bar-shaped tool are driver bits, it is possible to improve the work efficiency of the tightening work on the screw parts.

  In the invention according to claim 3, the socket mechanism includes a socket body member, a rotating member, and a one-way rotating mechanism. The socket body member is provided with a first polygonal hole, and the rotating member has a second polygonal hole. Is provided. After tightening the clamping member with the second rod-shaped tool fitted in the second polygonal hole, when removing the second rod-shaped tool from the clamping member, the tool rotating means is loosened by the operator's carelessness. Even if it is rotated in the direction, since the one-way rotation mechanism functions, the second bar-shaped tool does not rotate in the loosening direction. Therefore, it is possible to prevent the tightening member having a small tightening torque from being loosened due to an erroneous operation after tightening.

  The best mode for carrying out the present invention will be described below with reference to the accompanying drawings. The description of claim 1 will be mainly described with reference to FIG. 9, the description of claim 2 will be mainly described with reference to FIG. 5, and the invention of claim 3 will be mainly described with reference to FIG. The drawings are to be viewed in the direction of the reference numerals.

  FIG. 1 is an exploded perspective view of a socket mechanism according to the present invention. The socket mechanism 10 includes a rotary spindle connecting member 16, a tool fitting member 21, a one-way clutch 30 as a one-way rotary mechanism, a rotary member 41, and the like. A tool mounting part including a washer 45, a retaining ring 47, a rubber ball 49 as a tool retaining member, and a ball pressing cylinder 51.

  FIG. 2 is a cross-sectional view of the socket mechanism according to the present invention, and will be described below with the left side of the figure as the front end or the front and the right side of the figure as the rear end or the rear.

The socket mechanism 10 is formed with a rotation spindle fitting hole 11 into which a tip of a rotation spindle protruding from a tool rotating means (not shown in detail) (not shown) is fitted, and a pin fitting hole 12 intersecting the rotation spindle fitting hole 11. The rotary main shaft coupling member 16 having two slits 15 and 15 having a cracked shape and provided in a cylindrical portion 14 that extends forward from the inner bottom surface 13 and the two slits 15 and 15. A large-diameter portion 18 having two long projections 17 and 17 (details will be described later) for insertion into the large-diameter portion, and a small-diameter portion 19 having a smaller diameter than the large-diameter portion 18 formed by extending forward from the large-diameter portion 18. A tool fitting member 21 provided, a one-way clutch 30 (details will be described later) fitted into the large-diameter portion 18 of the tool fitting member 21, and a rotating member 41 fitted and supported inside the one-way clutch 30; Craft A first hexagonal hole 42 (detailed later) that is provided so as to penetrate the small diameter portion 19 of the fitting member 21 in the axial direction and fits a shank portion of a first rod-shaped tool (detailed later) not shown. A second hexagonal hole 43 (detailed later), which is provided on the rotary member 41 so as to continue backward from the first hexagonal hole 42 and fits a shank portion of a second rod-shaped tool (not shown in detail) (not shown); A washer 45 inserted between the cylindrical portion 14 and the large-diameter portion 18 so as to be in contact with the tip surfaces 44, 44 of the 17, 17, and a circumference formed on the inner peripheral surface of the cylindrical portion 14 to hold the washer 45. A retaining ring 47 fitted in the groove 46, a rubber ball 49 fitted in a ball holding hole 48 provided at an intermediate position of the small-diameter portion 19 of the tool fitting member 21, and a small diameter of the tool fitting member 21 for holding the rubber ball 49 Ball retainer tube 5 to be fitted to the portion 19 It is composed of a.
52 is an O-ring, and 53 is an O-ring groove.

  Returning to FIG. 1, the cylindrical portion 14 of the rotary spindle connecting member 16 is provided with two slits 15, 15 having an arbitrary width in the circumferential direction and formed in the axial direction at symmetrical positions, The large-diameter portion 18 of the tool fitting member 21 has two elongated protrusions 17 and 17 formed in the axial direction and having an arbitrary width in the circumferential direction so as to be inserted into the two slits 15 and 15. It is provided at a symmetrical position. By fitting the protrusions 17 and 17 into the slits 15 and 15, the rotary spindle connecting member 16 and the tool fitting member 21 are connected.

  3 is a cross-sectional view taken along the line 3-3 in FIG. 2, and the lower surface of the rubber ball 49 protrudes above the first hexagonal hole 42 formed in the tool fitting member 21. Therefore, when the shank portion of the first rod-shaped tool is fitted into the first hexagonal hole 42, the rubber ball 49 is inserted into the first retaining circumferential groove (detailed later) provided in the shank portion of the first rod-shaped tool. When the lower surface is pressed, the first rod-shaped tool can be prevented from coming off.

  In addition, since the rubber ball 49 can be substituted by a structure in which a steel protruding member and a compression coil spring are combined, it can be changed to other parts.

  4 is a cross-sectional view taken along line 4-4 of FIG. 2, in which the large-diameter portion 18 of the tool fitting member 21 is fitted into the cylindrical portion 14 of the rotary spindle connecting member 16 located on the outermost side, and the projections 15 and 15 are projected. 17 and 17 are fitted, and the rotary member 41 is fitted to the tool fitting member 21 via the one-way clutch 30.

  Further, the rotary member 41 is provided with a second hexagonal hole that is provided in the back of the first hexagonal hole (reference numeral 42 in FIG. 3) and fits a shank portion of a second bar-shaped tool having a smaller diameter than the first bar-shaped tool. 43 is formed.

  And since the 2nd retaining groove | channel (detailed later) is formed in the shank part of the 2nd rod-shaped tool similarly to the shank part of the above-mentioned 1st rod-shaped tool, this 2nd retaining groove | channel When the lower surface of the rubber ball (reference numeral 49 in FIG. 3) is pressed against the second ball-shaped tool, it is possible to prevent the second bar-shaped tool from coming off.

  Further, the one-way clutch 30 is in contact with the outer ring 31 fitted to the tool fitting member 21, twelve cam surfaces 32 formed with arcs of a constant interval on the inner peripheral surface of the outer ring 31, and these cam surfaces 32. Twelve rollers 33, a retainer 34 for holding these rollers 33, twelve compression springs 35 having one end attached to the retainer 34 and the other end connected to the twelve rollers 33, Is provided.

  When the rotating spindle connecting member 16 is rotated clockwise, which is the tightening direction, the outer ring 31 of the tool fitting member 21 and the one-way clutch 30 rotates clockwise, so that the twelve cam surfaces 32 have twelve rollers 33. Engage. Thereby, since the 12 rollers 33 press the rotating member 41, the rotating member 41 rotates clockwise.

  Conversely, when the rotary spindle connecting member 16 is rotated counterclockwise, which is the loosening direction, the tool fitting member 21 and the outer ring 31 of the one-way clutch 30 rotate counterclockwise. Separate from the individual roller 33. Accordingly, the twelve rollers 33 are separated from the rotating member 41, so that the rotating member 41 maintains a stationary state.

  In addition, about the rotation direction of subsequent components, the tightening direction is clockwise and the loosening direction is counterclockwise.

  The one-way clutch 30 is composed of the outer ring 31, the cam surface 32, the rollers 33, the retainer 34, and the compression spring 35. For example, when the cam is provided between the outer ring and the inner ring and rotated in the tightening direction, the cam Since the cam can be engaged with the outer ring and the inner ring and the cam is not engaged with the outer ring and the inner ring when rotated in the loosening direction, the structure is not limited to that shown in FIG.

  Returning to FIG. 3, the tool fitting member 21 is connected to the rotary spindle connecting member (reference numeral 16 in FIG. 4). Therefore, when the rotation main shaft coupling member is rotated clockwise, the tool fitting member 21, the rubber ball 49, and the ball pressing cylinder 51 fitted to the tool fitting member 21 are rotated clockwise. Further, when the rotation main shaft connecting member is rotated counterclockwise, the tool fitting member 21, the rubber ball 49, and the ball pressing cylinder 51 are rotated counterclockwise.

  The socket mechanism 10 described so far is not a component that functions alone, but is actually a component that is attached to a rotating spindle of an impact wrench as a tool rotating means that incorporates a drive source such as a motor, and a rod-shaped tool. It is a part that grips the base of the rod-shaped tool so that it can be mounted in a replaceable manner. Next, an impact wrench unit formed by assembling the impact wrench, the socket mechanism 10 and the rod-like tool will be described below.

  FIG. 5 is an explanatory view of the mounting of the socket mechanism according to the present invention. In the impact wrench unit 60, the tip of the rotary main shaft 62 projected from the impact wrench 61 as shown by the arrow (1) is used as the rear end of the socket mechanism 10. The connecting pin 64 is inserted into the pin fitting hole 12 provided at the rear end portion of the socket mechanism 10 and the main shaft pin fitting hole 63 provided at the tip of the rotary main shaft 62 as shown by an arrow (2). The split pin 66 is inserted into the split pin fitting hole 65 provided at the lower end of the pin 64 as shown by the arrow (3) to connect the socket mechanism 10 to the impact wrench 61, and the tip of the socket mechanism 10 is indicated by the arrow (4). Thus, the tool unit is formed by inserting a cross-shaped large-diameter driver bit 67 as a first bar-shaped tool.

  In addition, when tightening the small-diameter screw, the cross-shaped large-diameter driver bit 67 is removed, and the cross-shaped small-diameter driver bit 68 as the second rod-shaped tool is inserted and used as shown by the arrow (5).

  Therefore, the first bar-shaped tool and the second bar-shaped tool are characterized by a cruciform large diameter driver bit 67 and a cruciform small diameter driver bit 68. Therefore, it is possible to improve the work efficiency of the tightening work for the cross-recessed machine screw.

  The cross-shaped large-diameter driver bit 67 is a hexagonal bar-shaped large-diameter tool shaft. A cross-shaped large-diameter bit 69 is formed at the tip of the hexagonal bar-shaped large-diameter tool shaft, and a large hexagonal cross-section is formed at the rear end. A diameter shank portion 71 is formed, and a first retaining circumferential groove 72 is formed at the rear portion.

The cross-shaped small-diameter driver bit 68 is a round-bar-shaped small-diameter tool shaft. A cross-shaped small-diameter bit 73 is formed at the tip of the round-bar-shaped small-diameter tool shaft, and a hexagonal cross-section small-diameter shank is rearward from the rear end surface. The part 74 is protruded, and a second retaining circumferential groove 75 is formed at an intermediate position.
76 is a grip, 77 is a switch, 78 is a torque sensor, and 79 is a motor.
Next, the operation of the socket mechanism 10 having the above configuration will be described.

  FIG. 6 is an operation diagram of the tightening operation in the socket mechanism of the present invention. In FIG. 6A, the first cross in which the cross-shaped small diameter driver bit 68 is set on the first work 81 as indicated by the arrow (6). When the rotary main shaft 62 is driven clockwise by pressing against the head 83 of the machine screw 82 with a hole, the cruciform small diameter driver bit 68 rotates clockwise via the one-way clutch 30 and the first cross machine screw 82 Is tightened.

  In (b), the cruciform large-diameter driver bit 67 is pressed against the head 86 of the second cross-recessed machine screw 85 set on the second work 84 as shown by the arrow (7), and the rotary spindle 62 is rotated clockwise. , The cross-shaped large-diameter driver bit 67 rotates clockwise through the tool fitting member 21, and the second cross-recessed machine screw 85 is tightened.

  Next, the operation of the one-way clutch 30 when the impact wrench is accidentally loosened (counterclockwise) after screw tightening will be described with an impact wrench unit 60 equipped with a cross-shaped small diameter driver bit 68. FIG.

  FIG. 7 is a diagram for explaining the normal operation of the one-way clutch. When the rotary main shaft coupling member 16 is rotated clockwise as indicated by arrow (8) in FIG. 7A, the twelve rollers 33 of the one-way clutch 30 are shown. Presses the rotating member 41 so that a rotational force is applied to the rotating member 41, and the rotating member 41 rotates clockwise as indicated by an arrow (9).

  In (b), the switch (reference numeral 77 in FIG. 5) of the impact wrench unit 60 is pressed to drive the motor (reference numeral 79 in FIG. 5), the rotation main shaft 62 is rotated clockwise, and the second cross-recessed machine screw 85 is tightened with a cross-shaped small diameter driver bit 68.

  FIG. 8 is an explanatory view of the operation when the one-way clutch is erroneously operated. When the rotating main shaft connecting member 16 is rotated counterclockwise as indicated by the arrow (10) in FIG. Since 33 is away from the rotating member 41, no rotational force is applied to the rotating member 41. Therefore, the rotating member 41 remains stopped.

  After completing the tightening of the second cross-recessed machine screw 85 in (b), the impact wrench 61 is mistakenly removed when the cross-shaped small-diameter driver bit 68 is removed from the second cross-recessed machine screw 85 as shown by the arrow (11). When rotating counterclockwise, the rotary main shaft 62 rotates counterclockwise, but the cross-shaped small diameter driver bit 68 maintains a stationary state by the one-way clutch (reference numeral 30 in FIG. 8A).

  Therefore, the socket mechanism 10 includes the rotary spindle connecting member 16, the tool fitting member 21, the one-way clutch 30, and the rotating member 41. The tool fitting member 21 is provided with a first hexagonal hole (reference numeral 42 in FIG. 3). The rotating member 41 is provided with a second hexagonal hole 43. After tightening the second cross-recessed machine screw 85 (clamping member) with a cross-shaped small-diameter driver bit 68 fitted in the second hexagonal hole 43, the second cross-recessed machine screw 85 is used to start the cross-shaped small-diameter driver. When the bit 68 is removed, even if the impact wrench 61 is rotated in the loosening direction by the carelessness of the operator, the cross-shaped small diameter driver bit 68 does not rotate in the loosening direction because the one-way clutch 30 functions. Therefore, it is possible to prevent the tightening member having a small tightening torque from being loosened due to an erroneous operation after tightening.

  In the socket mechanism 10 described above, the cross-shaped large-diameter driver bit 67 that is the first rod-shaped tool is separately fitted to the tool fitting member 21 and the cross-shaped small-diameter driver bit 68 that is the second rod-shaped tool is separately fitted to the rotating member 41. Combined. However, in consideration of the manufacturing cost of the socket mechanism, it is desirable that the cross-shaped large-diameter driver bit 67 and the cross-shaped small-diameter driver bit 68 are replaceably attached to an integral member. Therefore, an integrated socket mechanism that can replaceably install two rod-shaped tools having different diameters will be described in the following embodiment.

  FIG. 9 is a diagram showing a modified embodiment of FIG. 2, and the same components as those in FIG. The socket mechanism 10B has a cross-shaped large-diameter driver bit (reference numeral 67 in FIG. 5) that is formed from the front end to the rear end of the main body 87 that is a main member of the socket mechanism 10B. A first hexagonal hole 42B for fitting a large diameter shank portion (reference numeral 71 in FIG. 5) and a second rod-shaped tool provided in the back of the first hexagonal hole 42B and having a smaller diameter than the cross-shaped large diameter driver bit. The second hexagonal hole 43B for fitting the small-diameter shank portion (Fig. 5, reference numeral 74) of the cross-shaped small-diameter driver bit (Fig. 5, reference numeral 68), the cross-shaped large-diameter driver bit, and the cross-shaped small-diameter driver bit. And a rubber ball 49 fitted into a ball holding hole 48 provided at the front end of the main body 87 while preventing the rod-shaped tool from coming off.

  The main body 87 of the socket mechanism 10B has a first hexagonal hole 42B for fitting a cross-shaped large-diameter driver bit and a second hexagon-shaped driver bit having a smaller diameter than the cross-shaped large-diameter driver bit. A square hole 43B is provided. Therefore, tools with different diameters can be freely mounted with one socket mechanism 10B. Therefore, the work efficiency of the tightening work can be improved.

  Moreover, since the rubber ball 49 is provided in the socket mechanism 10B, the stick-shaped tool can be prevented from coming off by pressing the stick-shaped tool with the rubber ball 49. Thereby, since the tightening operation is stabilized, a socket mechanism with improved workability can be provided.

In addition, although the 1st polygon hole used for this invention, the 2nd polygon hole, the shank part of the 1st rod-shaped tool, and the shank part of the 2nd rod-shaped tool were demonstrated with the hexagonal hole in embodiment. Since square holes and octagonal holes can be adopted, it is possible to change to other fitting shapes.
Moreover, although the 1st rod-shaped tool and the 2nd rod-shaped tool used for this invention demonstrated the cross-shaped driver bit in embodiment, since a slot-shaped driver bit or a hexagon socket can be employ | adopted, others The tool axis can be changed to this type.

  The socket mechanism of the present invention is suitable for a part to which a tool for fastening a fastening member such as a screw or a bolt is attached.

It is a disassembled perspective view of the socket mechanism which concerns on this invention. It is sectional drawing of the socket mechanism which concerns on this invention. FIG. 3 is a sectional view taken along line 3-3 in FIG. 2. FIG. 4 is a cross-sectional view taken along line 4-4 of FIG. It is attachment explanatory drawing of the socket mechanism which concerns on this invention. It is an effect | action figure of the clamping operation | work in the socket mechanism of this invention. It is operation | movement explanatory drawing at the normal time of a one-way clutch. It is operation | movement explanatory drawing at the time of the erroneous operation of a one-way clutch. FIG. 3 is a modified embodiment diagram of FIG. 2. It is a figure explaining the basic principle of the prior art.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 10, 10B ... Socket mechanism, 16 ... Rotation main shaft coupling member (socket main body member), 21 ... Tool fitting member (socket main body member), 30 ... One-way clutch (one-way rotation mechanism), 41 ... Rotation member, 42, 42B ... 1st hexagonal hole (first polygonal hole), 43, 43B ... 2nd hexagonal hole (2nd polygonal hole), 49 ... Rubber ball (tool retaining member), 61 ... Impact wrench (tool) Rotating means), 62... Rotating spindle, 67... Cross-shaped large-diameter driver bit (first rod-shaped tool), 68... Cross-shaped small-diameter driver bit (second rod-shaped tool), 71. (Shank part of the rod-shaped tool), 74... Small diameter shank part (shank part of the second rod-shaped tool), 76... Grip part, 79.

Claims (3)

The rotation is provided so that a rod-shaped tool can be mounted replaceably on a tool rotating means that includes a gripping part, has a built-in driving source such as a motor, and projects one end of a rotating spindle that is rotated by the driving source. A socket mechanism that is provided at the tip of the spindle and grips the base of the rod-shaped tool,
The socket mechanism includes a first polygonal hole that fits the shank portion of the first bar-shaped tool, and a second diameter that is provided in the back of the first polygonal hole and has a smaller diameter than the first bar-shaped tool. A second polygonal hole for fitting a shank portion of the rod-shaped tool, and a tool retaining member for retaining the rod-shaped tool by pressing the first rod-shaped tool and the second rod-shaped tool. Socket mechanism characterized by that.   The socket mechanism according to claim 1, wherein the first bar-shaped tool and the second bar-shaped tool are driver bits. The socket mechanism includes a socket body member coupled to the rotation main shaft, a rotation member housed in the socket body member so as to be idled, and the socket body member interposed between the rotation member and the socket body member. A one-way rotation mechanism that applies a rotational force to the rotating member when rotating in the tightening direction and does not apply a rotational force to the rotating member when the socket body member rotates in the loosening direction,
The socket mechanism according to claim 2, wherein the socket body member is provided with the first polygonal hole, and the rotating member is provided with the second polygonal hole.

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