JP5880814B2 - Sliding spline shaft device and manufacturing method thereof - Google Patents

Description

  The present invention relates to a sliding spline shaft device and a manufacturing method thereof.

  In various mechanical devices such as manufacturing machines and automobiles, a sliding spline shaft device is used so as to be relatively movable in the axial direction. That is, when the female spline of the first shaft member and the male spline of the second shaft member are fitted, the first shaft member and the second shaft member are relatively movable in the axial direction. Furthermore, in order to prevent the male spline from being detached from the female spline in a state where the male spline is fitted to the female spline, a stopper may be attached to the tip of the male spline (see, for example, Patent Document 1).

  For example, a structure may be employed in which the first shaft member is divided into two in the axial direction and the respective flange portions of the two members are fastened with bolts. In this case, it is assembled as follows. The second shaft member is inserted into the female spline portion of the first shaft member, and then a stopper is attached to the tip of the second shaft member, and then the other portion of the first shaft member is fastened to the female spline portion with a bolt. .

Japanese Utility Model Publication No. 60-15410

However, in the conventional structure, the first shaft member must be divided into two members, and the outer shape increases in size and the mass increases due to the flange portion for fastening.
This invention is made | formed in view of such a situation, and provides the sliding-type spline shaft apparatus which can attach a stopper, without providing a flange part in a 1st shaft member, and its manufacturing method. Objective.

(Sliding spline shaft device)
(Claim 1) A sliding-type spline shaft device according to the present invention includes a first shaft member having a female spline on the inner periphery, and is slidable in the axial direction with respect to the female spline and restricted in movement in the circumferential direction. A second shaft member having a male spline that fits on the outer periphery, and is attached to one end in the axial direction of the second shaft member, and is engaged with the female spline in the axial direction. And a stopper that restricts the first shaft member from coming off to the other side in the axial direction, wherein the first shaft member includes the female spline and the female spline. A first opening for inserting the second shaft member formed on the other side in the axial direction, and a gap formed on the one side in the axial direction of the female spline and having an inscribed circle diameter equal to or larger than the groove bottom diameter of the female spline And the shaft of the female spline An opening portion of the small inscribed circle diameter than the circumscribed circle diameter of the male spline toward one side, and a second opening to be used for the stopping the stopper to the second shaft member, said stopper , before Symbol passable so formed grooves before Kimesu splines from the first opening of the first shaft member in the axial direction, the stopper is not fully latched in the axial direction one end of the second shaft member in the state, is rotatable about the central axis of the first shaft member in the previous SL gap portion, wherein the stopper in the axial direction whereas the fully latched state to an end of said second shaft member, before in the gap portion It engages axially relative Kimesu splines.

(Claim 2) In addition, the stopper, the has a male spline can pass the female spline on the outer periphery, the stopper, the female spline of the lands of the male spline of the prior SL stopper the first shaft member of the hill portion is the fully latched to the second shaft member in a state of being engaged axially pre Symbol the second shaft member, the said first shaft member and the lands of the male spline of the stopper the axial engagement between the lands of the female spline is restricted to that passing into the other axial side of the front Symbol first shaft member.

(Manufacturing method of sliding spline shaft device)
(Claim 3 ) A method of manufacturing a sliding spline shaft device according to the present invention includes a first shaft member having a female spline on the inner periphery, a sliding in the axial direction relative to the female spline, and a movement in the circumferential direction. A second shaft member having a male spline fitted on the outer periphery so as to be regulated, and attached to one end in the axial direction of the second shaft member, and is engaged with the female spline in the axial direction; And a stopper for restricting the shaft member from slipping toward the other side in the axial direction with respect to the first shaft member, wherein the first shaft member includes the female spline, A first opening formed on the other axial side of the female spline to insert the second shaft member, and an inscribed portion formed on the one axial side of the female spline and having a diameter equal to or larger than the groove bottom diameter of the female spline. A gap having a circular diameter The diameter of the circumscribed circle of the stopper is larger than the diameter of the inscribed circle of the female spline, and the manufacturing method includes inserting the stopper from the first opening of the first shaft member, A stopper insertion step of passing through the groove portion of the spline in the axial direction and disposing in the gap portion; and after the stopper is inserted from the first opening portion in the stopper insertion step , the second shaft member is moved to the first opening portion. A second shaft member inserting step for fitting the female spline of the first shaft member and the male spline of the second shaft member, and the stopper in the gap portion of the first shaft member. A stopper mounting step of rotating about a central axis to engage with the female spline in the axial direction and mounting the stopper to one end in the axial direction of the second shaft member.

(Claim 4) In addition, the first shaft member is an opening of a small inscribed circle diameter than the circumscribed circle diameter of the male spline in one axial direction, in order to attach the stopper to the second shaft member has a second opening to be used, the stopper insertion step and the second shaft member insertion step, while temporarily fixed to one axial end of said second shaft member by the fastening member the stopper, the stopper and the The second shaft member is inserted from the first opening of the first shaft member, and the stopper mounting step is performed after the fastening member is relaxed using the second opening and then the central shaft of the first shaft member The fastening member may be permanently fixed to the second shaft member by rotating around.

  (Claim 1) According to the present invention, the stopper is inserted from the first opening located on the other axial side of the female spline of the first shaft member, and is disposed in the gap. Therefore, in order to arrange the stopper on one side in the axial direction of the female spline of the first shaft member, there is no need to divide the first shaft member into two as in the prior art. Therefore, the flange part conventionally required to divide the first shaft member into two parts becomes unnecessary for the first shaft member in the present invention. Therefore, since the first shaft member does not have a flange portion in the central portion in the axial direction, the first shaft member can be reduced in size and weight.

Here, the stopper is inserted from the first opening side of the first shaft member, that is, from the side where the second shaft member is inserted, and is disposed in the gap through the female spline. However, the stopper disposed in the gap is rotated around the central axis of the first shaft member to engage with the female spline in the axial direction. As described above, the stopper is allowed to pass through the female spline or is engaged with the female spline in the axial direction depending on the phase around the axis of the first shaft member. Therefore, the stopper is attached to one end in the axial direction of the second shaft member in a phase in which the stopper is axially engaged with the female spline at the gap, so that the second shaft member is moved to the first shaft by the stopper. It is possible to reliably prevent the member from coming out to the other side in the axial direction.
Further, it is necessary to rotate the stopper around the axis of the first shaft member in the gap. Therefore, by providing the second opening on one side in the axial direction of the first shaft member, the stopper can be rotated using the second opening.

  (Claim 2) According to the present invention, the stopper has a male spline on the outer periphery. Thereby, when a stopper passes the female spline of a 1st shaft member, each hill part of the male spline of a stopper passes the groove part of the female spline of a 1st shaft member. Then, in a state where the stopper is attached to the second shaft member in the gap, the plurality of hill portions of the male spline of the stopper are engaged in the axial direction with the plurality of hill portions of the female spline of the first shaft member. . Therefore, the locking force by the stopper can be increased.

(Claim 3 ) According to the present invention, the first shaft member does not have a flange portion, similarly to the above-described invention related to the sliding spline shaft device. Therefore, the sliding spline shaft device is reduced in size and weight. Can be achieved. Further, the stopper is attached to one end in the axial direction of the second shaft member in a phase in which the stopper is engaged with the female spline in the axial direction in the gap, so that the second shaft member is moved to the first shaft by the stopper. It is possible to reliably prevent the member from coming out to the other side in the axial direction.

(Claim 4 ) As in the present invention, in a state before the stopper and the second shaft member are inserted into the first shaft member, the stopper and the second shaft member are temporarily fixed, whereby the first shaft of both members Insertion into a member becomes easy. Then, the fastening member is permanently fixed after the stopper is rotated to a phase that engages with the female spline of the first shaft member by using the second opening of the first shaft member. Thereby, the phase alignment of the stopper can be easily performed and the fastening by the fastening member can be easily performed.

It is an axial sectional view of the sliding spline shaft device in the present embodiment. It is an enlarged view of the AA cut part end surface of FIG. It is an enlarged view of the BB cutting part end surface of FIG. It is a flowchart which shows the manufacturing method of the sliding-type spline shaft apparatus of FIG. It is an axial sectional view of the sliding spline shaft device showing the state of S2 in FIG. It is an enlarged view of the CC cut part end surface of FIG. It is an axial sectional view of the sliding spline shaft device showing the state of S3 in FIG. It is an enlarged view of the DD cut part end surface of FIG. It is a figure corresponding to the enlarged view of the BB cutting part end surface of FIG. 1 in a deformation | transformation aspect. A broken line shows a state in which the stopper passes through the female spline. A dashed-two dotted line shows the virtual rectangle which enters into the 1st groove part and the 2nd groove part among female splines.

  DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments of a sliding spline shaft device and a method for manufacturing the same according to the present invention will be described with reference to the drawings. The sliding type spline shaft device of this embodiment is demonstrated with reference to FIGS.

  The sliding spline shaft device is applied to, for example, a rolling mill, a propeller shaft of an automobile, and the like, and a universal joint configured so that the yokes at both ends are relatively movable in the axial direction is taken as an example. The sliding spline shaft device includes a first shaft member 10, a second shaft member 20, a stopper 30, and a lid member 40.

  The first shaft member 10 includes a yoke portion 11 and a cylindrical portion 12 that is integrally formed on the other axial side of the yoke portion 11. The yoke portion 11 constitutes a part of a universal joint that is connected with an angle with respect to another member (not shown). The yoke portion 11 is formed in a U shape that opens to one side in the axial direction.

  The cylindrical portion 12 of the first shaft member 10 is formed in a substantially cylindrical shape. A female spline 12 a is formed on the inner periphery of the cylindrical portion 12. A circular first opening 12b having an inner diameter equal to or larger than the groove bottom diameter of the female spline 12a is formed on the other axial side of the female spline 12a of the cylindrical portion 12. Further, in the cylindrical portion 12, a cylindrical gap portion 12c having an inscribed circle diameter equal to or larger than the groove bottom diameter of the female spline 12a is formed on one axial side of the female spline 12a. Furthermore, a second opening 12d penetrating the gap 12c and the outside in the axial direction is formed at one end in the axial direction of the cylindrical portion 12, that is, at the bottom of the yoke portion 11. The inner diameter of the second opening 12d is smaller than the inscribed circle diameter of the female spline 12a. The second opening 12d is used as an attachment work hole for attaching the stopper 30 to one end in the axial direction of the second shaft member 20 in the gap 12c. In addition, after forming the part of the female spline 12a and the part of the space | gap part 12c integrally formed in the yoke part 11, the cylinder part 12 is couple | bonded by welding etc. This is because the female spline 12a is easily processed.

  The second shaft member 20 is slidable in the axial direction with respect to the first shaft member 10 and is restricted in rotation. The second shaft member 20 includes a yoke portion 21 and a shaft portion 22 that is integrally formed on one side of the yoke portion 21 in the axial direction. The yoke portion 21 constitutes a part of a universal joint that is connected with an angle with respect to another member (not shown). The yoke portion 21 is formed in a U shape that opens to the other side in the axial direction.

  The shaft portion 22 of the second shaft member 20 is formed in a substantially cylindrical shape. A male spline 22 a is formed on the outer periphery of the shaft portion 22. The male spline 22a is slidable in the axial direction with respect to the female spline 12a of the first shaft member 10, and is spline-fitted so as to be restricted in movement in the circumferential direction. Therefore, as shown in FIG. 2, the hill portion of the male spline 22a of the second shaft member 20 (the portion protruding radially outward) is the groove portion of the female spline 12a of the first shaft member 10 (two adjacent hill portions). Between).

  The axial length of the male spline 22a is longer than the axial length of the female spline 12a. Therefore, one end in the axial direction of the male spline 22a passes through one end position in the axial direction of the female spline 12a and reaches the gap portion 12c.

  As shown in FIGS. 1 and 3, the stopper 30 is formed in a plate shape having a male spline 30a on the outer periphery. The number of hill portions of the male spline 30 a of the stopper 30 is the same as the number of hill portions of the female spline 12 a of the first shaft member 10. The circumscribed circle diameter of the male spline 30a of the stopper 30 is slightly smaller than the groove bottom diameter of the female spline 12a of the first shaft member 10, and larger than the inscribed circle diameter of the female spline 12a. The groove bottom diameter of the male spline 30a is slightly smaller than the inscribed circle diameter of the female spline 12a. The width of the hill portion of the male spline 30 a of the stopper 30 is slightly smaller than the groove width of the female spline 12 a of the first shaft member 10. Accordingly, the stopper 30 can pass through the female spline 12a of the first shaft member 10, and each hill portion of the male spline 30a of the stopper 30 passes through the groove portion of the female spline 12a.

  At the center of the stopper 30, a bolt insertion hole 30b penetrating in the axial direction is formed. Further, near the center in the radial direction of the stopper 30, a plurality of bolt insertion holes 30c penetrating in the axial direction are formed in the circumferential direction. The stopper 30 is attached to one end in the axial direction of the second shaft member 20 with a plurality of bolts 51 and 52 as fastening members in the gap portion 12c of the first shaft member 10. And in the state which attached the stopper 30 to the 2nd shaft member 20, as shown in FIG. 3, each hill part of the male spline 30a of the stopper 30 is each hill part of the female spline 12a of the 1st shaft member 10. Is engaged in the axial direction. Therefore, the stopper 30 can restrict the second shaft member 20 from coming off to the other side in the axial direction with respect to the first shaft member 10.

  The lid member 40 is formed in a disc shape and has a plurality of bolt insertion holes penetrating in the axial direction. The lid member 40 is attached to one side in the axial direction of the second opening 12d so as to close the second opening 12d of the first shaft member 10.

(Manufacturing method of sliding spline shaft device)
The manufacturing method (assembly method) of the sliding spline shaft device described above will be described with reference to FIGS. 1 to 3 and FIGS. 5 to 8 as appropriate, mainly using the flowchart of FIG. As shown in S1 of FIG. 4, the stopper 30 is temporarily fixed to one end in the axial direction of the second shaft member 20 (temporary fixing step). In this temporarily fixed state, as shown in FIGS. 5 and 6, the stopper 30 is temporarily fixed to the second shaft member 20 with a bolt 51 using only the bolt insertion hole 30 b at the center of the stopper 30. At this time, the phase of each hill part of the male spline 30a of the stopper 30 is in a state that matches the phase of each hill part of the male spline 22a of the second shaft member 20.

  Subsequently, as shown in S2 of FIG. 4, the temporarily fixed second shaft member 20 and the stopper 30 are inserted from the first opening 12b side of the first shaft member 10 (stopper insertion step, second Shaft member insertion step). This state is shown in FIG. 7 and FIG. At this time, the stopper 30 is inserted into the first shaft member 10 before the second shaft member 20.

  That is, the stopper 30 is inserted from the first opening 12 b of the first shaft member 10 before the second shaft member 20. Here, each hill part of the male spline 30a of the stopper 30 has a shape capable of passing through the groove part of the female spline 12a in the axial direction. Accordingly, the stopper 30 passes through the groove portion of the female spline 12a in the axial direction and is disposed in the gap portion 12c (stopper insertion step).

  Then, following the stopper 30, the second shaft member 20 is inserted from the first opening 12 b of the first shaft member 10. Then, the male spline 22a of the second shaft member 20 is fitted to the female spline 12a of the first shaft member 10 (second shaft member insertion step). Here, at this time, the second shaft member 20 is inserted into one axial direction side of the first shaft member 10 until the one axial end of the second shaft member 20 is positioned in the gap 12c. deep.

  Subsequently, the operator uses the second opening 12d to insert a tool (not shown) such as a hexagon wrench into the gap 12c, and the temporary fixing bolt 51 of the stopper 30 located in the gap 12c. Relax. Here, the inner diameter of the gap 12c is equal to or larger than the groove bottom diameter of the female spline 12a. Therefore, the inner diameter of the gap portion 12 c is larger than the circumscribed circle diameter of the stopper 30. That is, the stopper 30 is allowed to rotate around the central axis of the first shaft member 10 in the gap 12c. Since the temporary fixing bolt 51 is attached only to the center of the stopper 30, the stopper 30 can be easily rotated around the central axis with respect to the second shaft member 20. Therefore, as shown in S3 of FIG. 4, the stopper 30 is rotated around the central axis so that the hill portion of the male spline 30a of the stopper 30 and the hill portion of the female spline 12a are in phase. That is, as shown in FIG. 8, when viewed from the axial direction, the hill portion of the male spline 30a of the stopper 30 is engaged with the hill portion of the female spline 12a in the axial direction.

  As shown in FIG. 1 and FIG. 3, in this state, the second bolt 12d is used to fully fix the central bolt 51 and tighten it with the bolt 52 through a plurality of surrounding bolt insertion holes 30c. Thus, as shown to S3 of FIG. 4, the stopper 30 can be attached to the axial direction one end of the 2nd shaft member 20 in the space | gap part 12c (stopper attachment process). The stopper 30 engages with the female spline 12a in the axial direction, so that the second shaft member 20 is restricted from coming out to the other side in the axial direction with respect to the first shaft member 10. Then, as shown to S5 of FIG. 4, the cover member 40 is attached to the 2nd opening part 12d of the 1st shaft member 10, and it completes (cover member attachment process).

(effect)
According to the present embodiment, the stopper 30 is inserted from the first opening 12b of the first shaft member 10 and disposed in the gap 12c. Therefore, in order to arrange the stopper 30 on the axial direction one side of the female spline 12a of the first shaft member 10, it is not necessary to divide the first shaft member 10 into two parts as in the prior art. Therefore, the flange part conventionally required to divide the first shaft member 10 into two parts becomes unnecessary for the first shaft member 10. Therefore, since the first shaft member 10 does not have a flange portion in the central portion in the axial direction, the first shaft member 10 can be reduced in size and weight.

  Here, the stopper 30 is inserted from the first opening 12b side of the first shaft member 10, that is, from the side where the second shaft member 20 is inserted, and is disposed in the gap portion 12c through the female spline 12a. However, the stopper 30 disposed in the gap 12c rotates around the central axis of the first shaft member 10 so as to engage with the female spline 12a in the axial direction. As described above, the stopper 30 is allowed to pass through the female spline 12a or is engaged with the female spline 12a in the axial direction depending on the phase around the axis of the first shaft member 10. Therefore, the stopper 30 is attached to one end in the axial direction of the second shaft member 20 in a phase in which the stopper 30 is engaged with the female spline 12a in the gap portion 12c in the axial direction. The shaft member 20 can be reliably prevented from coming off from the first shaft member 10 to the other side in the axial direction.

  Further, the stopper 30 has a male spline 30a on the outer periphery. Accordingly, when the stopper 30 passes through the female spline 12a of the first shaft member 10, each hill portion of the male spline 30a of the stopper 30 passes through the groove portion of the female spline 12a of the first shaft member 10. And in the state which attached the stopper 30 to the 2nd shaft member 20 in the space | gap part 12c, the some hill part of the male spline 30a of the stopper 30 is compared with the some hill part of the female spline 12a of the 1st shaft member 10. Engaging in the axial direction. Therefore, the locking force by the stopper 30 can be increased.

  Here, in order to rotate the stopper 30 around the axis of the first shaft member 10 in the gap 12c, the second opening 12d is used. Thereby, the stopper 30 can be rotated reliably and easily. Furthermore, since the second opening 12d is sufficient with a small hole, it is needless to say that it is not necessary to use a conventional flange.

  Furthermore, in a state before the stopper 30 and the second shaft member 20 are inserted into the first shaft member 10, the stopper 30 and the second shaft member 20 are temporarily fixed, whereby both the members are attached to the first shaft member 10. Easy to insert. Then, using the second opening 12 d of the first shaft member 10, after the stopper 30 is rotated to a phase that engages with the female spline 12 a of the first shaft member 10, the bolt 51 is permanently fixed. Accordingly, the stopper 30 can be easily phased and fastened with the bolts 51 and 52. In particular, in the temporary fixing, it is very easy to rotate the stopper 30 around the central axis with respect to the second shaft member 20 by temporarily fixing with the bolt 51 using only the bolt insertion hole 30b at the center of the stopper 30. It becomes.

<Other embodiments>
In the said embodiment, although the stopper 30 was made into the shape which has the male spline 30a on the outer periphery, it is not restricted to this. Another embodiment will be described with reference to FIG. As shown in FIG. 9, the stopper 130 has a long rectangular shape when viewed from the central axis direction of the first shaft member 10, the circumscribed circle diameter of the stopper 130 is larger than the inscribed circle diameter of the female spline 12a, and The groove diameter is smaller than that of the female spline 12a.

  And among the female spline 12a, the 1st groove part 61 (between two adjacent hill parts) which lets the one end side of the long rectangle of the stopper 130 pass, and the other end side of the long rectangle of the stopper 130 pass. A virtual rectangle 100 that enters the two groove portions 62 (between two adjacent hill portions) is set. Here, in FIG. 9, the first groove portion 61 and the second groove portion 62 are shown as symmetrical positions with respect to the central axis, but the present invention is not limited to this and may be positions that are not symmetrical with respect to the central axis.

  The short side of the stopper 130 is set to be shorter than the short side of the virtual rectangle 100. Accordingly, the stopper 130 can pass through the first groove 61 and the second groove 62 of the female spline 12a. After the stopper 130 is disposed in the gap portion 12c, the stopper 130 is rotated around the central axis of the first shaft member 10, and both ends of the stopper 130 are engaged with the hill portion of the female spline 12a in the axial direction. Set to phase. In this state, the stopper 130 is attached to the second shaft member 20.

10: first shaft member, 12a: female spline, 12b: first opening, 12c: gap, 12d: second opening, 20: second shaft member, 22a: male spline, 30, 130: stopper, 30a : Male spline 51, 52: Bolt

Claims (2)

A first shaft member having a female spline on the inner periphery;
A second shaft member having a male spline on the outer periphery, which is slidable in the axial direction with respect to the female spline and fitted so as to be restricted in the circumferential direction;
Attached to one end of the second shaft member in the axial direction, engages the female spline in the axial direction, and restricts the second shaft member from coming out to the other side in the axial direction with respect to the first shaft member. A stopper to
A sliding spline shaft device comprising:
The first shaft member is formed on the female spline, a first opening formed on the other axial side of the female spline and into which the second shaft member is inserted, and on the one axial side of the female spline. A gap having an inscribed circle diameter equal to or larger than a groove bottom diameter of the female spline, and an opening having an inscribed circle diameter smaller than the circumscribed circle diameter of the male spline on the one axial side of the female spline, comprising a second opening using said stopper to the stopper biaxially member,
The circumscribed circle diameter of the stopper is formed larger than the inscribed circle diameter of the female spline,
The stopper is
Passed movable around a groove of the front Kimesu splines axially from the first opening of the front Symbol first shaft member,
In a state where the stopper is not fully latched in the axial direction one end of said second shaft member being rotatable about the central axis of the first shaft member in the previous SL gap portion,
In the state wherein the stopper which is fully latched in the axial direction one end of the second shaft member, sliding spline shaft unit for engaging in the axial direction with respect to the front Kimesu spline in the gap portion. In claim 1,
The stopper has a male spline on the outer periphery that can pass through the female spline,
The stopper is fully latched to the second shaft member in a state in which the and the hill portion of the female spline and engaging in the axial direction of the male spline of the hill portion and the first shaft member before Symbol stopper,
Before Stories second shaft member, by the axial engagement between the lands of the female spline of the first shaft member and the lands of the male spline of the stopper, the axial direction to the front Symbol first shaft member A sliding spline shaft device that is restricted from coming out to the other side.

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