JP6219862B2 - Member connection structure - Google Patents

Description

  The present invention relates to a connecting portion structure of members, and more particularly to a connecting portion structure that is lightweight and can be constructed at low cost.

  A connecting portion structure is known in which the first member and the second member are connected so as to be capable of relative rotation around a rotation axis, and can be positioned so as not to be capable of relative rotation at a predetermined angular position around the rotation axis. Yes. The devices described in Patent Documents 1 and 2 relate to a connecting structure of a foldable small vehicle frame. In Patent Document 1, a pair of members are connected to each other via a circular hole so as to be relatively rotatable. At the same time, the ratchet mechanism, the reverse rotation prevention pawl, and the like are positioned so as not to be relatively rotatable at two angular positions. Moreover, in the connection part structure shown by FIG. 5 of patent document 2, while a pair of members are connected so that relative rotation is possible via a fixed pin, relative rotation is impossible by fitting with a fixed block and a fixed tank. It is designed to be positioned.

JP 2014-177231 A JP 2011-911 A

  However, in the case of the connecting portion structure described in Patent Document 1, since the structure is complicated and the number of parts is large, there is a problem that the manufacturing cost is increased and the weight is increased. In addition, although the connecting portion structure described in Patent Document 2 has a small number of parts, it is a solid structure, so that the weight is heavy, and the manufacturing cost is high because the shape is complicated and the processing is troublesome. It was.

  The present invention has been made in the background of the above circumstances, and the object of the present invention is to provide a light-weight connecting portion structure that can be relatively rotated and can be positioned at a predetermined angular position. It is to be able to configure at low cost.

  In order to achieve such an object, according to the first aspect of the present invention, the first member and the second member are connected to each other so as to be relatively rotatable about the rotation axis, and at a predetermined angular position around the rotation axis. In the connecting portion structure that can be non-rotatably positioned, (a) the first member is provided with a non-circular first through hole parallel to the rotation axis, while the second member has A circular second through hole is provided concentrically with the rotational axis, and a locking hole portion is provided continuously to the second through hole, and (b) the first through hole and the first through hole are provided. (2) having a connecting shaft that is inserted through the two through-holes and that cannot rotate relative to the first through-hole based on the non-circular first through-hole; The connecting shaft has a longitudinal dimension of a cross section perpendicular to the pivot axis that is equal to or smaller than a radial dimension of the second through hole, One, and having an insertion engagement section in the locking hole portion.

  According to a second aspect of the present invention, in the connecting portion structure of members according to the first aspect, the engaging portion has a tapered shape, and the locking hole portion has a tapered shape corresponding to the tapered shape. Both sides of the engaging portion are closely attached to the engaging hole portion over a predetermined length range.

  According to a third aspect of the present invention, there is provided a connecting portion structure for members according to the first or second aspect, wherein the first member and the second member are each a flat plate-like first connecting plate portion orthogonal to the rotational axis. And the second connecting plate portion, the first connecting plate portion is provided with the first through hole, and the second connecting plate portion is provided with the second through hole and the locking hole portion. It is characterized by that.

  According to a fourth aspect of the present invention, there is provided the connecting portion structure of members according to the third aspect of the present invention. (A) The first member and the second member are provided with a first clevis and a second clevis each having a pair of parallel side plate portions. (B) at least one of the pair of side plate portions of the first clevis is used as the first connecting plate portion, and at least one of the pair of side plate portions of the second clevis is the second connecting plate. (C) The pair of side plate portions of the second clevis are inserted into and overlapped with the inside of the pair of side plate portions of the first clevis.

  In the connecting portion structure of such a member, the connecting shaft is disposed so as to be inserted through both the first through hole and the second through hole, so that the rotation axis that is the center of the circular second through hole is provided. The first member and the second member are connected so as to be rotatable relative to each other, and the first member is connected together with the connecting shaft so that the engaging portion provided on the connecting shaft is inserted into the locking hole. By relative displacement (sliding) with respect to the second member, the first member and the second member are positioned so as not to rotate relative to each other via the connecting shaft. In this case, the first member is provided with a first through hole, and the second member is provided with a second through hole and a locking hole portion, and straddles the first through hole and the second through hole. Since the connecting shaft only needs to be arranged, the structure is simple, the number of parts is small, the processing is easy, and the connecting portion does not necessarily have to be a solid structure. it can.

  In the second invention, since the engaging portion and the locking hole portion have a tapered shape, the engaging portion can be smoothly inserted into the locking hole portion by the guide action of the tapered shape, and the first member The relative positioning of the second member and the second member can be performed easily and quickly. Further, since both side portions of the engaging portion are brought into close contact with the locking hole portion over a predetermined length range, the first member and the second member are firmly positioned without causing rattling at a predetermined angular position. Is done.

  In the third aspect of the invention, the first member and the second member are each provided with a flat plate-like first connecting plate portion and second connecting plate portion that are orthogonal to the rotation axis, and the first connecting plate portion and the second connecting plate portion are provided with When the first through hole, the second through hole, and the locking hole are provided directly to the first member and the second member, the first through hole, the second through hole, and the locking hole are provided. In comparison, the degree of freedom of design and the degree of freedom of processing are increased, and the manufacturing cost can be further reduced.

  In the fourth invention, the first member and the second member are provided with the first clevis and the second clevis, respectively, and the pair of side plate portions of the second clevis are inserted inside the pair of side plate portions of the first clevis. Since they are overlapped, rattling in the direction parallel to the pivot axis is prevented, and the postures of the first member and the second member are stable, and cannot be relatively rotated or rotated at a predetermined angular position. The workability at the time of positioning is improved. Moreover, since the pair of side plate portions of the first clevis are exposed to the outside, the connecting shaft can be easily inserted into the first through hole provided in the side plate portion of the first clevis and connected by welding or the like. The shaft can be easily and non-detachably assembled to the first clevis.

It is a perspective view which shows an example of the small vehicle which has a connection part structure to which this invention was applied. It is a perspective view which shows the connection part of the flame | frame of the small vehicle of FIG. It is the perspective view which decomposed | disassembled and showed the connection part of FIG. It is a figure explaining the relationship between the 1st through-hole shown in FIG. 3, a 2nd through-hole, a locking hole part, and a connection shaft. It is a figure explaining the action | operation of the connection part of FIG. It is a figure explaining the other Example of this invention, and is a perspective view corresponding to FIG. It is the perspective view which decomposed | disassembled and showed the connection part of FIG. It is a figure explaining the relationship between the 1st through-hole shown in FIG. 7, a 2nd through-hole, a locking hole part, and a connection shaft. It is a figure explaining the action | operation of the connection part of FIG.

  The connecting portion structure of the present invention is suitably applied to a connecting portion of a foldable small vehicle or a vehicle frame of other vehicles, but various members such as a frame other than a vehicle, a shaft member, and a rotating member can be used. It can be applied to the connecting part. As the first member and the second member, a hollow member such as a round pipe or a square pipe is preferably used, but a solid member such as a round bar or a square can be used as necessary. The angular range in which rotation is possible and the angular position in which relative rotation is impossible are determined as appropriate. For example, the angular position is aligned at a straight angle, but can also be positioned at a bent angle at a predetermined angle such as a right angle. . By providing a plurality of locking holes or engaging portions, positioning at a plurality of angular positions is also possible. The second member is pivotably connected to an intermediate position of the first member, or the first member is pivotally connected to an intermediate position of the second member, and can be positioned at a T-shaped position or the like. Various aspects are possible.

  The first through hole only needs to be non-circularly connected to the connecting shaft so as not to be relatively rotatable, and various shapes such as an oval shape can be adopted. The connecting shaft desirably has the same cross-sectional shape as the first through-hole, but can be inserted through the first through-hole and the second through-hole, and cannot rotate relative to the first through-hole. If it can be connected, various shapes can be adopted. The longitudinal dimension (diameter dimension of the circumscribed circle) of the cross section perpendicular to the pivot axis of the connecting shaft may be equal to or smaller than the diameter dimension of the second through hole, but rattling during relative rotation is prevented. Therefore, a dimension that is substantially the same as or slightly smaller than the diameter of the second through hole is appropriate. The connecting shaft is desirably attached to the first member in a state where the first through hole and the second through hole are inserted, and is fixed to the first through hole, for example, by welding or an adhesive. What is necessary is just to fix by press fitting, or to prevent it from coming off by snap ring, beta pin, caulking or the like.

  In the second invention, the engaging portion and the locking hole portion have a tapered shape. However, when the first invention is carried out, the engaging portion and the engaging portion such as a U-shape or a U-shape, etc., whose both side portions are substantially parallel to each other. A blind hole can also be employed. In this case, when the cross section of the connecting shaft perpendicular to the rotation axis is an oval shape or a rectangle, the arc-shaped portion at one end thereof can be used as an engaging portion as it is. Only one of the engaging portion and the locking hole portion may be tapered, and even in this case, rattling can be prevented by reliably engaging both. As the taper shape, it is desirable that both side portions are linearly symmetric shapes like a V shape, but an asymmetric shape may be used, and both side portions may be curved.

  In the 3rd invention and the 4th invention, the 1st connecting plate part and the 2nd connecting plate part or the 1st clevis and the 2nd clevis are provided in the 1st member and the 2nd member. The second through hole and the locking hole are provided, but when implementing the other invention, the first through hole, the second through hole, and the locking hole are directly provided in the first member and the second member. It is also possible. Moreover, the flat 1st connection board part and 2nd connection board part which are integrally provided so that it may protrude from a 1st member and a 2nd member are also employable.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In the following embodiments, the drawings are appropriately simplified or modified for explanation, and the dimensional ratios, shapes, and the like of the respective parts are not necessarily drawn accurately.

  FIG. 1 is a schematic perspective view of a single-seat small vehicle 10 that is driven by an electric motor (not shown), and includes a plurality of foldable frames 12 and a plurality of wheels 14, and a seat 16 and a handle on which a driver is seated. 18 is provided. FIG. 2 is a perspective view of a portion in which the first frame 12a and the second frame 12b constituting the frame 12 are connected to each other so as to be foldable around the rotation axis S via the connecting portion 20. The frame 12a and the second frame 12b are positioned so as to be held in a straight line. FIG. 3 is an exploded perspective view of the connecting portion 20. The first clevis 22 is integrally fixed to the end of the first frame 12 a by welding or the like, and the end of the second frame 12 b is welded or the like. The second clevis 24 and the connecting shaft 26 are fixed integrally. The first frame 12a and the second frame 12b are both hollow cylindrical members such as square pipes, the first frame 12a corresponds to the first member, and the second frame 12b corresponds to the second member.

  The first clevis 22 includes a pair of flat plate-like side plate portions 30 and 32 that are parallel to each other, and the side plate portions 30 and 32 are arranged in a posture perpendicular to the rotation axis S in the first frame. The one side plate 30 is provided with an oval first through hole 34 that is long in the axial direction on the axis of the first frame 12a in plan view. ing. In the present embodiment, the side plate portion 30 functions as the first connecting plate portion. The second clevis 24 includes a pair of side plate portions 36 and 38 that are parallel to each other, and the side plate portions 36 and 38 are oriented from the second frame 12b in a posture perpendicular to the rotation axis S. The one side plate portion 36 is provided with a circular second through hole 40 so as to protrude in the direction. In the present embodiment, the side plate portion 36 functions as a second connecting plate portion.

  FIG. 4 is a diagram showing the relationship between the first through hole 34 and the second through hole 40, and the diameter d2 of the circular second through hole 40 indicated by the alternate long and short dash line is that of the first through hole 34 indicated by the solid line. It is substantially equal to the longitudinal dimension (diameter dimension of the circumscribed circle) d1. The second through hole 40 is continuously provided with a U-shaped locking hole portion 42 extending toward the second frame 12b side on the axis of the second frame 12b in plan view. The width dimension of the locking hole portion 42 is substantially equal to the width dimension of the first through hole 34. The distance between the pair of side plates 36, 38 of the second clevis 24 is smaller than the distance between the pair of side plates 30, 32 of the first clevis 22, and the pair of side plates 36, 38 is the side plate of the first clevis 22. It can be inserted so as to be overlapped substantially in close contact with each other inside the portions 30 and 32.

  The connecting shaft 26 is disposed in parallel with the rotation axis S and has a cross section orthogonal to the axis (a cross section orthogonal to the axis of the connection shaft 26 itself), that is, a cross section orthogonal to the rotation axis S. Can be arranged so as to be inserted through the first through hole 34 and the second through hole 40 with substantially the same shape and size as the oval first through hole 34. The solid line in FIG. 4 represents the first through hole 34 and the outer shape of the cross section perpendicular to the axis of the connecting shaft 26. Further, the axial length of the connecting shaft 26 is related to the first through hole 34 in a state where one end inserted into the first through hole 34 of the side plate portion 30 is brought into contact with the other side plate portion 32. The dimensions are such that the alignment is maintained. Therefore, as shown by the arrow (1) in FIG. 3, the second clevis 24 of the second frame 12b is inserted so as to overlap the inside of the first clevis 22 of the first frame 12a. By inserting the connecting shaft 26 into the first through hole 34 as shown by the arrow (2) in a state where the through holes 40 are aligned so as to be substantially concentric, the first frame 12a and the second frame The frame 12b is connected so as to be relatively rotatable around a rotation axis S that is the center of the second through hole 40. The connecting shaft 26 is integrally fixed to the first clevis 22 by welding or the like in such a state that the connecting shaft 26 is disposed so as to pass through the first through hole 34 and the second through hole 40. . FIG. 5 (a) shows a state in which the first frame 12a is connected to the second frame 12b in an angle range of about 180 ° as shown by an arrow R in this embodiment in such a state that the first frame 12a and the second frame 12b are connected. Relative rotation.

  In this embodiment, the through holes 34 and 40 and the locking hole 42 are provided in one of the side plates 30 and 36 of the clevises 22 and 24, but the other side plate 32 and 38 has the same shape. It is also possible to provide through holes 34 and 40 having a size and a locking hole portion 42 and to dispose the connecting shaft 26 so as to straddle both side plate portions 30, 32, 36 and 38.

  On the other hand, when the first frame 12a and the second frame 12b are relatively rotated around the rotation axis S so as to be substantially in a straight line as shown in FIG. 5 (b), the first frame 12a and the second frame 12b are integrated with the first frame 12a. The rotating connecting shaft 26 is rotated to an angular position that coincides with the locking hole 42 as indicated by a broken line in FIG. In this state, when the first frame 12a is slid so as to be relatively close to the second frame 12b integrally with the connecting shaft 26 as indicated by an arrow A in FIGS. 4 and 5 (b). The one end portion 26a of the connecting shaft 26 is inserted into the locking hole portion 42, and the first frame 12a and the second frame 12b are positioned through the connecting shaft 26 so as not to be relatively rotatable. FIG. 2 and FIG. 5 (c) show the state in which the first frame 12a and the second frame 12b are positioned so as not to rotate relative to each other. By being fixed to a frame or the like, it is held in a straight line state. Further, when the frames 12a and 12b are fixed and the first frame 12a is slid relative to the second frame 12b as shown by an arrow B in FIG. The one end 26a comes out of the locking hole 42 and can be relatively rotated around the rotation axis S as shown in FIG. One end portion 26 a of the connecting shaft 26 corresponds to an engaging portion that can be inserted into the locking hole portion 42.

  As described above, the connecting portion 20 of the frame 12 according to the present embodiment has the circular second through hole by arranging the connecting shaft 26 so as to pass through both the first through hole 34 and the second through hole 40. The first frame 12a and the second frame 12b are connected to each other so as to be relatively rotatable around a rotation axis S that is the center of 40. In addition, the first end 26a of the connecting shaft 26 is inserted together with the connecting shaft 26 so that the one end 26a of the connecting shaft 26 is inserted into the locking hole 42 in a state of being aligned in a straight line as shown in FIG. By relatively displacing (sliding) one frame 12a with respect to the second frame 12b, the first frame 12a and the second frame 12b are positioned so as not to rotate relative to each other via the connecting shaft 26. In that case, the first through hole 34 is provided in the first frame 12a, and the second through hole 40 and the locking hole portion 42 are provided in the second frame 12b. Since the connecting shaft 26 only needs to be disposed across the through hole 40, the structure is simple, the number of parts is small, and the processing is easy, and the connecting portion does not need to be a solid structure. Moreover, it can be configured at low cost.

  The first frame 12a and the second frame 12b are provided with clevises 22 and 24 having flat plate-like side plate portions 30 and 36 that are orthogonal to the rotation axis S, respectively. Since the first through hole 34, the second through hole 40, and the locking hole portion 42 are provided in 36, the first through hole 34 and the second through hole directly with respect to the first frame 12a and the second frame 12b. Compared with the case where 40 and the locking hole part 42 are provided, the freedom degree of a design and the freedom degree of a process become high, and can reduce manufacturing cost further.

  The first clevis 22 and the second clevis 24 are provided on the first frame 12a and the second frame 12b, respectively, and the pair of side plate portions 36 and 38 of the second clevis 24 are the pair of side plate portions of the first clevis 22. 30 and 32 are inserted so as to be substantially parallel to each other and overlapped so as to be in close contact with each other, so that rattling in a direction parallel to the rotation axis S is prevented and the first frame 12a and the second frame 12b are prevented. This improves the workability at the time of relative rotation and positioning at a predetermined angular position such that relative rotation is impossible.

  Further, since the pair of side plate portions 30 and 32 of the first clevis 22 are exposed to the outside, the connecting shaft 26 can be easily attached to the first through hole 34 provided in the side plate portion 30 of the first clevis 22. The connecting shaft 26 can be easily fixed to the first clevis 22 by welding or the like.

  Next, another embodiment of the present invention will be described. In the following embodiments, parts that are substantially the same as those in the above embodiments are denoted by the same reference numerals, and detailed description thereof is omitted.

  6 to 9 are diagrams corresponding to FIGS. 2 to 5, respectively, and the connecting portion 50 is different from that of the embodiment. Specifically, the first clevis 22 fixed to the first frame 12 a and the second clevis 24 fixed to the second frame 12 b are provided, and the second clevis 24 has a circular second through hole 40. However, the first through hole 52, the locking hole portion 54, and the connecting shaft 56 are different. The first through-hole 52 has an arc-shaped portion having a diameter substantially equal to that of the second through-hole 40 and a tapered projecting portion protruding to the opposite side of the arc-shaped portion. The protruding portion is provided in a posture protruding in the opposite direction to the first frame 12a along the axis of the first frame 12a. The arc-shaped portion is about 1/3 of the entire circumference, and both sides of the projecting portion form a linear shape that is inclined at a certain inclination angle so as to gradually approach gradually toward the tip side. The longitudinal dimension (diameter dimension of the circumscribed circle) d1 up to the tip of the protruding portion is substantially equal to the radial dimension d2 of the second through hole 40. In this embodiment, the first through hole 52 is provided in both the pair of side plate portions 30 and 32, and the pair of side plate portions 30 and 32 both function as the first connecting plate portion.

  On the other hand, the locking hole portion 54 provided continuously to the second through hole 40 has a tapered shape corresponding to the protruding portion of the first through hole 52, and the shaft of the second frame 12b in plan view. It is provided in a posture that protrudes toward the second frame 12b on the line. The second through hole 40 and the locking hole portion 54 are also provided in both the pair of side plate portions 36 and 38 of the second clevis 24, and both of the pair of side plate portions 36 and 38 are the second connecting plate. It functions as a department. Further, the connecting shaft 56 is disposed in parallel with the rotation axis S, and the cross section orthogonal to the axis, that is, the cross section orthogonal to the rotation axis S is substantially the same shape as the first through hole 52, The arcuate portion 58 and the projecting portion 60 are provided in size, and the axial length of the connecting shaft 56 is engaged across the pair of side plate portions 30 and 32 of the first clevis 22. It is the dimension that can be.

  Therefore, it is possible to connect them in the same manner as in the previous embodiment. First, as shown by the arrow (1) in FIG. 7, the second clevis 24 of the second frame 12b is moved to the inner side of the first clevis 22 of the first frame 12a. The first through hole 52 and the second through hole 40 are aligned so as to overlap substantially concentrically. Next, in this state, as shown by the arrow (2), the connecting shaft 56 is inserted into the first through hole 52, and the second through hole 40 provided in the pair of side plate portions 36, 38 of the second clevis 24. The first frame 12a and the second frame 12b are pivoted about the center of the second through hole 40 by being disposed across the pair of side plate portions 30 and 32 on the outer side. The shaft S is connected so as to be relatively rotatable. Then, with the connecting shaft 56 disposed across the pair of side plate portions 30 and 32 of the first clevis 22 as described above, the connecting shaft 56 is fixed integrally to the first clevis 22 by welding or the like. Is done. FIG. 9 (a) can be relatively rotated in an angular range of about 180 ° in such a state that it is connected so as to be relatively rotatable.

  Further, when the first frame 12a and the second frame 12b are relatively rotated around the rotation axis S so as to be substantially in a straight line as shown in FIG. 9B, the first frame 12a and the second frame 12b are integrated with the first frame 12a. The rotating connecting shaft 56 is rotated to an angular position where the projecting portion 60 coincides with the locking hole portion 54 as indicated by a broken line in FIG. Then, when the first frame 12a is slid so as to approach the second frame 12b integrally with the connecting shaft 56 as shown by an arrow A in FIG. 8 and FIG. The protruding portion 60 is inserted into the locking hole portion 54, and the first frame 12a and the second frame 12b are positioned through the connecting shaft 56 so as not to be relatively rotatable. Since the arc-shaped portion 58 of the connecting shaft 56 is about 1/3 of a circle, it can be moved toward the protruding portion 60 in the second through hole 40, and the protruding portion 60 is inserted into the locking hole 54. Can be engaged. The protruding portion 60 of the connecting shaft 56 corresponds to an engaging portion that can be inserted into the locking hole portion 54. (C) of FIG. 6 and FIG. 9 is the state which the 1st frame 12a and the 2nd frame 12b were positioned so that relative rotation was impossible in this way.

  Here, since the protruding portion 60 and the locking hole portion 54 have a tapered shape in which both side portions are inclined at a constant inclination angle, the protruding portion 60 is smoothly locked to the locking hole portion by the guide action by the tapered shape. Thus, the first frame 12a and the second frame 12b can be relatively displaced and positioned so that they cannot be rotated relative to each other. Further, since both side portions of the projecting portion 60 and the locking hole portion 54 are brought into close contact with each other over a predetermined length range, the protruding portion 60 and the locking hole portion 54 are firmly positioned without causing a backlash around the rotation axis S.

  On the other hand, when releasing the positioning of the frames 12a and 12b, as shown by the arrow B in FIG. 9C, if the first frame 12a is slid relatively away from the second frame 12b, The protruding portion 60 of the shaft 56 comes out of the locking hole portion 54 and can be relatively rotated around the rotation axis S as shown in FIG.

  Also in the present embodiment, the first clevis 22 provided with the first through-hole 52, the second clevis 24 provided with the second through-hole 40 and the locking hole portion 54, and the first through-holes 52 of these, Since the connecting portion 50 is configured by the connecting shaft 56 disposed across the second through hole 40, the structure is simple, the number of parts is small, and the processing is easy, and the connecting portion is a solid structure. Therefore, it is possible to obtain the same effects as those of the above-described embodiment, such as being lightweight and inexpensive.

  In addition, in the present embodiment, since the protruding portion 60 and the locking hole portion 54 are tapered, the protruding portion 60 can be smoothly inserted into the locking hole portion 54, and the first frame 12a. And the second frame 12b are relatively displaced so that they cannot be rotated relative to each other easily and quickly, and both sides of the protrusion 60 and the locking hole 54 extend over a predetermined length range. Since they are brought into close contact with each other, they are firmly positioned without causing any backlash around the rotation axis S.

  Moreover, the 1st through-hole 52 is provided in both of a pair of side plate parts 30 and 32 of the 1st clevis 22, and the 2nd through-hole 40 and a locking hole are formed in both of a pair of side plate parts 36 and 38 of the 2nd clevis 24. Since the connecting shaft 56 is disposed across all of the side plate portions 30, 32, 36, and 38, the twisting is suppressed and the first frame 12a and the second frame 12b are provided. The posture is further stabilized, and the workability when the relative rotation is performed or the relative rotation is impossible at a predetermined angular position is further improved.

  As mentioned above, although the Example of this invention was described in detail based on drawing, these are one Embodiment to the last, This invention is implemented in the aspect which added the various change and improvement based on the knowledge of those skilled in the art. be able to.

  12a: first frame (first member) 12b: second frame (second member) 20, 50: connecting portion 22: first clevis 24: second clevis 26, 56: connecting shaft 26a: one end (engaging portion) 30 and 32: Side plate portion (first connecting plate portion) 34, 52: First through hole 36, 38: Side plate portion (second connecting plate portion) 40: Second through hole 42, 54: Locking hole portion 60 : Protruding part (engaging part) S: Center of rotation

Claims (4)

In the connecting portion structure in which the first member and the second member are connected so as to be relatively rotatable about the rotation axis, and can be positioned so as not to be relatively rotatable at a predetermined angular position around the rotation axis.
The first member is provided with a non-circular first through hole parallel to the rotational axis, while the second member has a circular second through hole concentric with the rotational axis. And a locking hole portion is provided continuously to the second through hole,
A connecting shaft through which both the first through hole and the second through hole are inserted and which is not rotatable relative to the first through hole based on the fact that the first through hole is non-circular. Have
The connecting shaft has an engaging portion that has a longitudinal dimension of a cross section perpendicular to the pivot axis that is equal to or smaller than a radial dimension of the second through hole, and that can be inserted into the locking hole portion. The connection part structure of the member. The engaging portion has a tapered shape, and the locking hole portion has a tapered shape corresponding to the tapered shape, and both side portions of the engaging portion extend over a predetermined length range. The member connecting portion structure according to claim 1, wherein the member connecting portion is in close contact with the locking hole portion. Each of the first member and the second member includes a flat plate-like first connecting plate portion and a second connecting plate portion that are orthogonal to the rotation axis, and the first connecting plate portion includes the first connecting plate portion and the second connecting plate portion. 3. The member connecting portion structure according to claim 1, wherein one through hole is provided, and the second connecting plate portion is provided with the second through hole and the locking hole portion. The first member and the second member are each provided with a first clevis and a second clevis having a pair of side plate portions parallel to each other,
At least one of the pair of side plate portions of the first clevis is used as the first connecting plate portion, and at least one of the pair of side plate portions of the second clevis is used as the second connecting plate portion,
The pair of side plate portions of the second clevis are inserted into and superimposed on the inside of the pair of side plate portions of the first clevis. The member connection portion structure according to claim 3.

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