JP6390385B2 - Connecting structure between shafts - Google Patents

Description

  The present invention relates to a shaft connection structure for connecting shafts of a steering device or the like.

  As shown in FIG. 2A, in the steering device 20, the extension shaft 22 connected to the handle 21 rotates in accordance with the operation of the handle 21, and this rotation is transferred to the transfer reverse gear 23, the intermediate shaft 24, and the power assist 25. To the steering gear 26 to steer the wheels (not shown).

  When these shafts are connected, the shafts are connected by the universal joint 27 when the shafts have crossing angles, and are connected by the connecting member 30 when the shafts coincide with each other.

  FIG. 2B shows details of the connecting member 30 surrounded by a circle d in FIG. 2A. The connecting member 30 is attached to the extension shaft 22, and the shaft 28 on the transfer reverse gear 23 side is attached. After being inserted into the hole of the connecting member 30, it is connected by tightening with a bolt 31.

  A connecting structure for connecting the shafts having the same axial center with the connecting member 30 will be described with reference to FIGS. 3 (a), 3 (b), and 3 (c).

  The connecting member 30 includes a cylindrical portion 33 into which one shaft 32 is fitted and connected, a pinch yoke portion 35 formed in a U-shaped cross section into which the other shaft 34 is inserted, and a cylindrical portion 33 and a pinch yoke portion 35. And a connecting portion 36 for connecting the two. The pinch yoke portion 35 includes a fitting portion 35a fitted to the shaft 34 and a pair of fastening pieces 35b and 35b extending in a tangential direction from the fitting portion 35a. The bolt 31 is inserted into one of the fastening pieces 35b. A bolt hole 37 is formed, and a screw hole 38 to be screwed with the bolt 31 is formed in the other fastening piece 35b.

  Further, the shaft 34 inserted into the pinch yoke portion 35 is formed with an arcuate groove 39 that engages with the bolt 31 when the bolt 31 is inserted through the bolt hole 37 and screwed into the screw hole 38. .

JP 2006-290112 A JP 2013-190017 A JP 2010-105412 A JP 2008-126298 A

  In the connection structure of FIG. 3, when the shaft 34 is inserted into the pinch yoke portion 35 of the connection member 30 as shown in FIGS. 3A and 3C, When the bolt 31 is screwed and fastened in a state where the arc-shaped groove 39 of the shaft 34 is coincident, the fastening pieces 35b and 35b are fastened to each other and the shaft 34 is securely attached to the pinch yoke portion 35 by the fastening force. Can be fixed.

  However, when the shaft 34 is inserted, even if the bolt 31 is inserted and tightened with the bolt hole 37 and the screw hole 38 and the arc-shaped groove 39 of the shaft 34 shifted as shown in FIG. There is a problem that it is tightened although it is incomplete.

  That is, when the fastening pieces 35b, 35b are tightened with the bolt 31, the fastening pieces 35b, 35b are pulled and narrowed by tightening to change the angle, so that the screw hole 38 has a bolt diameter so that the bolt 31 can tilt. Even if the bolt hole 37 and the screw hole 38 are deviated from the arcuate groove 39 of the shaft 34, the shaft 34 is fixed by the tightening force of the pinch yoke portion 35.

  In this way, when the shaft 34 is fastened and fixed to the pinch yoke portion 35 in the state shown in FIG. 3B, the bolt 31 and the shaft 34 are fastened in a state where they are tightened. The shaft 34 freely rotates with respect to the pinch yoke portion 35 due to slackness or the like, which causes a problem that the shaft rotation cannot be transmitted.

  Then, the objective of this invention is providing the connection structure of the shafts which solves the said subject and can position and connect reliably, when connecting shafts by fastening with a volt | bolt using a connection member. .

  In order to achieve the above object, the present invention provides a shaft-to-shaft connecting structure in which shafts are connected to each other using a connecting member. The connecting member includes a cylindrical portion into which one shaft is fitted and connected, and a U-shaped cross section. And a pinch yoke portion that fastens and fixes the other shaft to be inserted with a bolt force, and an arcuate groove that engages with the bolt that fastens the pinch yoke portion is formed on the peripheral surface of the other shaft. The other shaft is inserted into the pinch yoke part and pushed to a position where it abuts against the one shaft, and the arc-shaped groove and a bolt hole formed in the pinch yoke part at a position where the shafts abut each other And a shaft-to-shaft structure, wherein the screw holes are formed to coincide with each other.

  The pinch yoke portion includes a fitting portion that fits with the other shaft and a pair of fastening pieces that extend tangentially from the fitting portion, and a bolt hole into which a bolt is inserted is formed in one of the fastening pieces. A screw hole for screwing the bolt is formed in the other fastening piece, and the bolt is inserted into the bolt hole and screwed into the screw hole, and both fastening pieces are fastened and the other shaft is fastened to the fastening portion. It is preferable to fix.

  When the other shaft is inserted into the pinch yoke portion and abutted against the one shaft, the one shaft or the shaft with respect to the connecting member is arranged such that the bolt hole and the screw hole coincide with the arc-shaped groove. The insertion length of the other shaft is preferably set.

  The present invention exhibits an excellent effect that the connecting positions of the shafts can be reliably positioned and connected when the shafts are connected by using a connecting member and fastened with bolts.

1 shows an embodiment of the present invention, (a) is a cross-sectional view when the shafts are connected by a connecting member, (b) is a cross-sectional view taken along line AA in FIG. 1 (a), and (c) is a connection. It is a front perspective view. BRIEF DESCRIPTION OF THE DRAWINGS The outline of the steering device with which this invention is applied is shown, (a) is the whole figure, (b) is a detailed drawing of the circle | round | yen d part of Fig.2 (a). The connection structure of the shafts used as the premise of this invention is shown, (a) is sectional drawing when a shaft is normally positioned and connected with a connection member, (b) is when it connects in the position-shifted state Sectional drawing (c) is a plane sectional view of the pinch yoke portion of FIG. 3 (a).

  A preferred embodiment of the present invention will be described below in detail with reference to the accompanying drawings.

  First, the shaft-to-shaft structure to which the present invention is applied is used to connect various shafts in addition to using the connecting member 10 and the bolt 11 to connect the various shafts used in the steering device 20 described in FIG. Also applies.

  In FIG. 1, the connecting member 10 includes a cylindrical portion 13 into which one shaft 12 is fitted and connected, a pinch yoke portion 15 formed in a U-shaped cross section into which the other shaft 14 is inserted, a cylindrical portion 13, The connection part 16 which connects the pinch yoke part 15 is comprised.

  The pinch yoke portion 15 includes a fitting portion 15a fitted to the shaft 14 and a pair of fastening pieces 15b and 15b extending in a tangential direction from the fitting portion 15a, and the bolt 11 is inserted into one of the fastening pieces 15b. Bolt holes 17 are formed, and screw holes 18 that are screwed into the bolts 11 are formed in the other fastening pieces 15b.

  The shaft 14 inserted into the pinch yoke portion 15 is formed with an arcuate groove 19 that engages with the bolt 11 when the bolt 11 is inserted into the bolt hole 17 and screwed into the screw hole 18.

  The connecting member 10 is formed by press bending a single punched plate, the cylindrical portion 13 is bent so that the inner diameter is smaller than the outer diameter of one shaft 12, The connecting portion 16 and the fitting portion 15a of the pinch yoke portion 15 are bent so that the inner diameter is smaller than the outer diameter of the shaft 14 to be fitted.

  As shown in FIGS. 1B and 1C, the fastening pieces 15b and 15b of the pinch yoke portion 15 are formed so that their free ends are bent toward each other and overlap each other.

  In this way, after the connecting member 10 is press-bended, the cylindrical portion 13 is drilled so as to coincide with the outer diameter of the shaft 12 and a serration groove 12s is formed, and the shaft 12 also has a serration groove 12s. Is formed.

  The fitting portion 15 a of the pinch yoke portion 15, like the cylinder portion 13, is drilled so that the hole of the cylinder portion 13 and the shaft center coincide with each other, and a serration groove 14 s is formed in the fitting portion 15 a and the shaft 14. Is done.

  When the hole for fitting the shaft 14 into the fitting portion 15a is drilled, the dotted portions are also removed by drilling the folded portions of the fastening pieces 15b and 15b indicated by the dotted lines in FIG. .

  Further, the shaft 12 to be inserted into the cylindrical portion 13 is formed with a reduced diameter tip, and the insertion length is determined by the stepped portion 12d hitting the cylindrical portion 13.

  In the present invention, when the other shaft 14 is inserted into the fitting portion 15 a of the pinch yoke portion 15, the pinch yoke portion 15 is formed so as to abut against the one shaft 12. The bolt hole 17 and the screw hole 18 are aligned with the arc-shaped groove 19.

  In order to make the bolt hole 17 and the screw hole 18 and the arc-shaped groove 19 coincide with each other, the protruding length of one shaft 12 inserted into the cylindrical portion 13 of the connecting member 10 is set, or the other protruding from the pinch yoke portion 15 is set. The position is adjusted by setting the protruding length of the shaft 14.

  Next, the operation of the present embodiment will be described.

  First, the cylindrical portion 13 of the connecting member 10 is inserted into one shaft 12, and the cylindrical portion 13 and the shaft 12 are fixed by welding or the like in this state.

  Next, when connecting with the other shaft 14, the other shaft 14 is inserted into the fitting portion 15 a of the pinch yoke portion 15 and pushed in until it abuts against the end surface of the other shaft 14. As a result, the arc-shaped groove 19 coincides with the bolt hole 17 and the screw hole 18.

  In this state, by inserting the bolt 11 from the bolt hole 17 and screwing the tip of the bolt 11 into the screw hole 18, the fastening pieces 15b and 15b are attracted to each other by the tightening force of the bolt, and the shaft 14 is pinched by the pinch yoke. Fastened and fixed to the part 15.

  At this time, since the bolt 11 is securely engaged with the arc-shaped groove 19 of the shaft 14, the pinch yoke portion 15 can securely fix the shaft 14 even if wear or slackening of the bolt occurs due to use.

DESCRIPTION OF SYMBOLS 10 Connecting member 12, 14 Shaft 13 Tube part 15 Pinch yoke part 17 Bolt hole 18 Screw hole 19 Arc-shaped groove

Claims (3)

In the connection structure between the shafts that connect the shafts using a connection member,
The connecting member is composed of a cylindrical portion to which one shaft is fitted and connected, and a pinch yoke portion that is formed in a U-shaped cross section and fastens and fixes the other inserted shaft with a bolt force.
An arcuate groove that engages with a bolt that fastens the pinch yoke portion is formed on the peripheral surface of the other shaft.
The other shaft is inserted into the pinch yoke part and pushed to a position where it abuts against the one shaft. A shaft-to-shaft structure characterized by being formed so that the holes coincide with each other.   The pinch yoke portion includes a fitting portion that fits with the other shaft and a pair of fastening pieces that extend tangentially from the fitting portion, and a bolt hole into which a bolt is inserted is formed in one of the fastening pieces. A screw hole for screwing the bolt is formed in the other fastening piece, and the bolt is inserted into the bolt hole and screwed into the screw hole, and both fastening pieces are fastened and the other shaft is fastened to the fastening portion. The connection structure of the shafts of Claim 1 to fix.   When the other shaft is inserted into the pinch yoke portion and abutted against the one shaft, the one shaft with respect to the coupling member is aligned with the bolt hole and the screw hole and the arc-shaped groove. Or the connection structure of the shafts of Claim 2 by which the insertion length of the other shaft is set.

Images