JP2015168020A - reaction force receiving device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a reaction force receiving device which can correspond to a pitch between axes of various bolts, is easy to operate, does not require skill, can perform fastening work quickly, and is excellent in work efficiency.SOLUTION: A reaction force receiving device comprises a reaction force cover (10) and a reaction force receiving socket (30). The reaction force cover (10) has a mounting part (11) to be mounted to a casing (2) of a fastening tool (1) in an unrotatable way at one end, and an engaging part (12) at the other end. The reaction force receiving socket (30) has an engaging part (31) to be engaged with the engaging part (12) of the reaction force cover (10) in the unrotatable way at one end, and a long hole (36) at the other end. The shaft center of the engaging part (31) of the reaction force receiving socket (30) and the shaft center of the long hole (36) are consistent.

Description

  The present invention relates to a reaction force receiving device used together with, for example, a tightening tool.

  Conventionally, as a reaction force receiving device, there is one described in JP 2014-8550 A (Patent Document 1). This reaction force receiving device has a mounting portion made of a spline that is non-rotatably mounted on the clamping tool at one end, a reaction force bar having a hexagonal hole at the other end, and a hexagonal hole of the reaction force bar at one end. And a reaction force receiving socket having a hexagonal engagement hole at the other end. The axial center line of the hexagonal shaft portion of the reaction force receiving socket and the axial center line of the hexagonal engagement hole are separated from each other by a predetermined distance, and by changing the mounting direction of the reaction force receiving socket, It is possible to change the distance between the axis of the spline of the force bar and the axis of the hexagonal engagement hole of the reaction force receiving socket so that the bolts and nuts of various types of wheels of large vehicles can be tightened. Yes.

JP 2014-8550 A

  However, in the conventional reaction force receiving device, when there are a plurality of inter-axis pitches of the wheel bolts as workpieces, the spline shaft center as the mounting portion of the reaction force bar and the hexagonal engagement hole of the reaction force receiving socket In order to change the distance from the shaft center, the reaction force receiving socket must be removed from the reaction force bar and rotated by a certain angle to change the phase of the reaction force receiving socket. There are limitations, operation is complicated, skill is required, tightening work cannot be performed quickly, and work efficiency is poor.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a reaction force receiving apparatus that can cope with various bolt pitches, is easy to operate, does not require skill, can be fastened quickly, and has high work efficiency. There is to do.

In order to solve the above problems, the reaction force receiving device of the present invention is:
A reaction force bar having an attachment portion that is non-rotatably attached to the casing of the tightening tool at one end, and an engagement portion at the other end;
A reaction force receiving socket having an engagement portion that is non-rotatably engaged with the engagement portion of the reaction force bar at one end and a socket portion having a long hole at the other end is provided.

  In the reaction force receiving device having the above configuration, since the socket portion of the reaction force receiving socket is formed of a long hole, the socket portion formed of the long hole is simply fitted to a bolt or nut of a wheel having various inter-axis pitches as it is. In combination, it is easy to take a reaction force (receive a reaction force).

  Therefore, according to the reaction force receiving device of the present invention, it is possible to deal with bolts or nuts having various inter-axis pitches, and the operation is simple and easy, the tightening operation can be quickly performed, and the work efficiency is improved.

Moreover, the reaction force receiving device of one embodiment is
A spring for urging the reaction force receiving socket so as to advance and retreat in the axial direction of the reaction force receiving socket;
And a regulating member that regulates the axial movement distance of the reaction force receiving socket.

  According to the embodiment, the reaction force receiving socket is biased by the spring so as to be able to advance and retreat in the axial direction of the reaction force receiving socket. It can be fitted to the bolt head and nut, and workability is good.

  Further, since the movement distance in the axial direction of the reaction force receiving socket is restricted by the restriction member, the reaction force receiving socket can be prevented from falling off from the reaction force bar.

  According to the reaction force receiving device of the present invention, it is possible to deal with bolts or nuts having various inter-axis pitches, the operation is simple and easy, the tightening operation can be quickly performed, and the work efficiency is improved.

It is sectional drawing of the reaction force receiving apparatus of one Embodiment of this invention. It is a left view of the reaction force receiving apparatus of the said embodiment.

  Hereinafter, the present invention will be described in detail with reference to the illustrated embodiments.

  As shown in FIGS. 1 and 2, the drive shaft 3 protrudes from the casing 2 of the tightening tool 1, and the connection fitting 5 is engaged with the tip of the drive shaft 3 so as not to rotate. A substantially polygonal engagement hole 6 is provided at the distal end of the connection fitting 5, and a hexagonal head or a hexagonal nut of a bolt (not shown) is engaged with the engagement hole 6.

  Pins 7 are inserted in the direction perpendicular to the axial direction at the ends of the connection fitting 5 and the drive shaft 3 so that the connection fitting 5 does not fall off the drive shaft 3. An O-ring 8 is externally fitted into an annular groove provided on the outer peripheral surface of the connecting metal 5 to prevent the pin 7 from coming off.

  As the drive shaft 3 of the tightening tool 1 is rotated, the connection fitting 5 is driven to rotate, and bolts and nuts (not shown) engaged with the connection fitting 5 are tightened.

  On the other hand, the reaction force receiving device 100 includes a reaction force bar 10 and a reaction force receiving socket 30. A spline hole 11 as an example of a mounting portion at one end of the reaction force bar 10 is non-rotatably engaged with a spline on the outer periphery of the cylindrical portion 21 of the casing 2 of the tightening tool 1. The cylindrical portion 21 of the casing 2 is located on the outer periphery of the drive shaft 3. An O-ring 22 is inserted between the flange portion 21 a at the tip of the cylinder portion 21 and one end of the reaction force bar 10 to prevent the reaction force bar 10 from coming off from the cylinder portion 21.

  At the other end of the reaction force bar 10, an engaging portion 12 made of, for example, a square hole, a hexagonal hole or the like is formed. The engaging portion 12 at the other end of the reaction force bar 10 is slidable in the axial direction with an engaging portion 31 formed of, for example, a square shaft portion or a hexagon shaft portion at one end of the reaction force receiving socket 30. Engage and engage non-rotatably. A slit 32 is provided in the engaging portion 31 of the reaction force receiving socket 30, and a pin 33, which is an example of a regulating member, is inserted into the slit 32 and the other end of the reaction force bar 10. Can advance and retract by the length of the slit 32. On the outer periphery of the other end of the reaction bar 10, a ring 34 that also serves as a spring receiver is externally fitted to prevent the pin 33 inserted through the slit 32 from coming off. The ring 34 abuts on the step portion 13 provided on the reaction force bar 10.

  On the other hand, the other end of the reaction force receiving socket 30 is provided with a socket portion 36 formed of a long hole 36. The axial center line of the engaging portion 31 such as the square shaft portion or the hexagonal shaft portion of the reaction force receiving socket 30 and the axial center line of the elongated hole 36 coincide with each other. The axis of the engaging portion 31 of the reaction force receiving socket 30 and the axis of the elongated hole 36 are parallel to the axis of the drive shaft 3 of the tightening tool 1. However, the axial center line of the engaging portion 31 such as the square shaft portion or the hexagonal shaft portion of the reaction force receiving socket 30 and the axial center line of the elongated hole 36 do not have to coincide with each other. It is preferable that the axial center line of the engaging portion 31 of the receiving socket 30 passes through the long hole 36.

  In addition, a coil spring 38 as an example of a spring is provided between a portion forming the elongated hole 36 at the other end of the reaction force receiving socket 30 and a ring 34 serving as a spring receiver at the outer periphery of the other end of the reaction force bar 10. The reaction force receiving socket 30 is urged so as to advance and retract in the axial direction.

  Now, it is assumed that a nut of a wheel of a large vehicle is tightened using the reaction force receiving device 100 having the above configuration.

  First, the engagement hole 6 of the connecting metal fitting 5 at the tip of the drive shaft 3 of the tightening tool 1 is fitted into a nut screwed to a bolt to be tightened (not shown). In addition, the elongated hole 36 of the reaction force receiving socket 30 of the reaction force receiving device 100 is fitted into a nut that is screwed to a bolt that should take the reaction force of the wheel.

  At this time, since the socket portion 36 of the reaction force receiving socket 30 is not a perfect circle but is a long hole 36, this is the case when the inter-axis pitch between the bolt to be tightened and the bolt to be subjected to the reaction force is various. The socket portion 36 formed of the long hole 36 is simply fitted into a nut screwed to a bolt to be subjected to reaction forces of various inter-axis pitches, and the reaction force is easily taken (reaction force is reduced). Can receive. Therefore, according to the reaction force receiving device 100 of this embodiment, it is versatile with respect to bolts having various inter-axis pitches of the wheel, and the bolts and nuts can be easily tightened and does not require skill.

  More specifically, in this embodiment, unlike Patent Document 1, there is no need to remove the reaction force receiving socket 30 from the reaction force bar 10 and pivot it to adjust the phase. Since it is only necessary to fit the nut screwed to the bolt to be counteracted, tightening operation of the bolt and nut is simple and easy, does not require skill, can be fastened, and work efficiency is high. Become.

  In this state, when the drive shaft 3 of the tightening tool 1 is rotated, the nut is tightened to the bolt to be tightened via the connection fitting 5.

  At this time, the reaction force due to the tightening of the nut is transmitted to the cylindrical portion 21 of the casing of the tightening tool 1, transmitted to the mounting portion at one end of the reaction force bar 10 that is spline-fitted with the cylindrical portion 21, It is received by the bolt to be subjected to the reaction force via the engagement portion 12 of the reaction force bar 10, the engagement portion 31 of the reaction force receiving socket 30, and the socket portion 36 including the long hole 36.

  The reaction force receiving socket 30 is urged by a coil spring 38 so as to be able to advance and retreat in the axial direction of the reaction force receiving socket 30. Thus, it can be easily fitted to a nut screwed into a bolt to which a reaction force is to be applied, and the workability is good.

  Moreover, since the axial movement distance of the reaction force receiving socket 30 is regulated by the pin 33, the reaction force receiving socket 30 can be prevented from falling off the reaction force bar 10.

  In the above embodiment, the mounting portion of the reaction force bar 10 is composed of the spline hole 11, but the mounting portion of the reaction force bar 10 may be a selection hole, a screw portion, or a flange mounting portion.

  Moreover, in the said embodiment, although the reaction force bar 10 was mounted | worn with the cylinder part 21 of the casing 2 of the clamping tool 1, you may mount | wear with the flame | frame fixed to the casing. In this case, in this specification, the frame is also regarded as the casing of the clamping tool.

  In the above embodiment, the engaging portion 12 of the reaction force bar 10 is a square hole, a hexagonal hole, or the like, and the engaging portion of the reaction force receiving socket 30 that engages with the engaging portion 12 of the reaction force bar 10. 31 includes a square shaft portion or a hexagonal shaft portion. The engagement portion of the reaction force receiving socket 30 is used as an engagement portion of the reaction force bar such as a square shaft portion or a hexagonal shaft portion. It is good also as hole engaging parts, such as a square hole and a hexagon hole.

DESCRIPTION OF SYMBOLS 1 Tightening tool 2 Casing 3 Drive shaft 5 Connecting metal fitting 7, 33 Pin 10 Reaction force bar 12, 31 Engagement part 30 Reaction force receiving socket 36 Slot, socket part 33 Restriction member 38 Spring 100 Reaction force receiving device

Claims (2)

A reaction force bar having an attachment portion that is non-rotatably attached to the casing of the tightening tool at one end, and an engagement portion at the other end;
A reaction force characterized by comprising a reaction force receiving socket having an engagement portion that engages with the engagement portion of the reaction force bar at one end in a non-rotatable manner and a socket portion having a long hole at the other end. Receiving device. The reaction force receiving device according to claim 1,
A spring for urging the reaction force receiving socket so as to advance and retreat in the axial direction of the reaction force receiving socket;
A reaction force receiving device comprising: a regulating member that regulates an axial movement distance of the reaction force receiving socket.

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