JP3566190B2 - Shaft connection assist device - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a shaft connection assisting device . More particularly, the present invention relates to a machine capable of quickly and easily connecting shafts connected via a snap ring in various machines.
[0002]
[Prior art]
In various machines, a shaft for transmitting power, for example, a drive shaft of a front wheel drive type automobile, is connected to a connection portion such that an outer joint on the tire side does not come off via a snap ring.
The drive shaft has a spline structure at the tip, and a mounting groove is provided near the tip of the spline, and a snap ring is fitted into the mounting groove. The snap ring is formed of a metal material having elasticity, and has a so-called C shape in which a part thereof is cut out. The outer diameter of the snap ring is formed to be slightly larger than the outer diameter of the spline portion in a normal state (see FIG. 4 described later).
[0003]
Then, by applying force from the outside of the snap ring, it is reduced and deformed and housed in the mounting groove, inserted into the connection hole of the outer joint so that it does not protrude from the outer peripheral surface of the spline part, and the snap ring on the connection hole side The drive shaft can be connected by being expanded and fitted in the mounting groove.
Conventionally, the work of reducing the diameter of the snap ring and placing it in the mounting groove has been performed by sandwiching the snap ring with radio pliers or the like.
[0004]
[Problems to be solved by the invention]
However, the conventional method using the pliers as described above has the following problems.
That is, when the snap ring is sandwiched between the pliers, the contact portion is slippery and the work is difficult. In addition, with the pliers, force can be applied only at two points on the outer periphery of the snap ring. For this reason, when the snap ring shrinks and deforms, it is not possible to maintain a circular state, and the intermediate portion between the two contact portions of the pliers is sharply deformed.
Therefore, since the pointed portion protrudes from the outer peripheral surface of the spline portion of the drive shaft, the drive shaft cannot be easily inserted into the connection hole of the outer joint, and it takes a considerable time to perform the connection operation of the drive shaft. Was hanging.
[0005]
(Object of the present invention)
SUMMARY OF THE INVENTION It is an object of the present invention to provide a shaft connection assisting device that can quickly and easily connect a shaft connected via a snap ring in various machines such as a drive shaft of an automobile.
[0006]
[Means for Solving the Problems]
Means of the present invention taken to achieve the above object are as follows.
In the first invention,
A plurality of pressing means (4, 4a) abutting from outside on a snap ring (6) mounted in a mounting groove (50 ) of the shaft (5) ,
Interval adjusting means (3) for adjusting the interval between the pressing means (4, 4a) ,
With
Pressing means (4, 4a) are provided on the base member (1) and the movable member (2) , respectively, by moving the movable member (2) to adjust the distance to the base member (1) , The spacing between the pressing means (4, 4a) is adjusted,
The snap ring (6) is reduced and deformed by narrowing the interval between the pressing means (4, 4a) ,
It is a shaft connection assisting device.
[0007]
In the second invention,
The pressing means (4, 4a) provided on the base member (1) and the movable member (2) are characterized in that they have a plurality of pressing portions (41, 42) , respectively .
It is a shaft connection assistance device according to the first invention.
[0008]
In the third invention,
It has a base member (1) , a movable member (2) , a spacing adjusting screw (3) and a pressing body (4, 4a) ,
The base member (1) includes a base (10) and side portions (11, 12) provided on both sides thereof ,
A thread (30) of a gap adjusting screw (3) is screwed into one side (11) , and a movable member (2) is rotatably attached to an end of the thread (30) ,
The movable member (2), one pressing member abutting the outer side (4) is provided on the shaft snap ring that is mounted in the mounting groove (50) (5) (6),
The base member (1 ) is provided with another pressing body (4a) opposite to the pressing body (4) of the movable member (2) ,
It characterized in that it is constituted such that it is reduced deforming the snap ring (6) by narrowing the distance between the pressing means (4, 4a) by turning the spacing adjustment screw (3),
It is a shaft connection assisting device.
[0009]
In the fourth invention,
The base member (1) is provided with a guide hole (13) parallel to the length direction ,
Mounting holes (22, 23) penetrate through the movable member (2), and bolts (24, 25) are fixed to the mounting holes (22, 23 ) through the guide holes (13). Features,
It is a shaft connection assistance device according to a third invention.
[0010]
In the fifth invention,
The pressing means (4, 4a) is provided with a fitting portion (43) fitted into the snap ring (6) ,
A shaft connection assisting device according to the first, second, third or fourth invention.
[0011]
(Action)
The shaft connection assisting device according to the present invention operates as follows.
The position of the pressing means is adjusted to an appropriate position by the interval adjusting means, and each pressing means is positioned outside the snap ring mounted in the mounting groove of the shaft.
The pressing means is moved by the distance adjusting means to abut the snap ring from outside. Further, the pressing means is moved by the spacing adjusting means to press the snap ring from the outside and reduce the size of the snap ring so that the snap ring is accommodated in the mounting groove so that the outer peripheral portion of the snap ring does not protrude from the outer peripheral portion of the spline portion.
[0012]
The pressing means is provided on each of the base member and the movable member, and by adjusting the distance between the base member and the movable member, the interval between the pressing means is adjusted. In the case where a plurality is provided, the snap ring is pressed from outside by at least four pressing means.
Thus, when the snap ring is reduced and deformed, a circular state or a state close to a circular shape can be maintained.
[0013]
When the pressing means is provided with a fitting portion to be fitted into the snap ring, when the pressing means is brought into contact with the outer peripheral portion of the snap ring, the fitting portion is fitted so that the contact portion slips or comes off. do not do.
[0014]
BEST MODE FOR CARRYING OUT THE INVENTION
The present invention will be described in more detail based on the embodiments shown in the drawings.
FIG. 1 is a perspective view showing one embodiment of a shaft connection assisting device according to the present invention,
FIG. 2 is a plan view of the shaft connection assisting device shown in FIG. 1,
FIG. 3 is a front view of the shaft connection assisting device shown in FIG.
Reference numeral A denotes a shaft connection assisting device, which includes a base member 1, a movable member 2, an interval adjusting screw 3, and pressing members 4, 4a.
The base member 1 is made of metal, and is formed by bending a plate-like body into a U-shape. The base member 1 includes a base portion 10 formed to be slightly long, and side portions 11 and 12 provided at right angles on both sides thereof. An elongated guide hole 13 is provided in the center of the base 10 in parallel with the length direction.
[0015]
The one side 11 is provided with a screw hole 14 therethrough. The screw portion 30 of the gap adjusting screw 3 serving as the gap adjusting means is screwed into the screw hole 14. A plastic knob 31 is fixed to one end of the screw portion 30. The movable member 2 is attached to the other end (the base member 1 side) of the screw portion 30.
[0016]
The movable member 2 is made of metal and formed in an L plate shape. The movable member 2 has a slightly long base 20 and side portions 21 provided at right angles to the base 20. The side part 21 is provided with a mounting hole 26. The distal end of the thread portion 30 of the gap adjusting screw 3 is attached to the attachment hole 26 so as to be rotatable and not come off.
[0017]
The base 20 is configured to substantially contact the upper surface of the base 10 of the base member 1. The base 20 has juxtaposed mounting holes 22 and 23 penetrating therethrough. Bolts 24 and 25 are fixed to the mounting holes 22 and 23 through the guide holes 13. The bolt heads of the bolts 24 and 25 are formed to have a diameter larger than the width of the guide hole 13.
[0018]
The pressing member 4 is fixed to the inner surface of the side portion 21 of the movable member 2, and the pressing member 4 a is fixed to the inner surface of the side portion 12 of the base member 1 by a fixing screw 49.
The pressing members 4 and 4a are made of metal, and are formed by bending a plate in a substantially U-shape in a front view. The pressing members 4, 4a are symmetric.
[0019]
The pressing bodies 4 and 4a include a base 40 which is a portion fixed to the side 21 and the side 12. 1 and 3 of the base 40, pressing portions 41 and 42 constituting pressing means are formed at acute angles in the vertical direction so as to narrow the interval between the front portions. The tips of the pressing portions 41 and 42 are formed so as to protrude to one side in the width direction of the movable member 2, and the outer side is closer to the inner side (the side facing each other in FIG. 2). The angle is set gently, and both sides are slightly narrowed (see FIGS. 1 and 2).
A fitting portion 43 to be fitted into the snap ring is provided in a recessed manner near the tip of the contact side 44 on the inner side of the front end of each of the pressing portions 41 and 42 (a total of four places). The contact sides 44 of the pressing portions 41 and 42 are provided in parallel with each other.
[0020]
(Operation)
FIG. 4 is an explanatory view showing the structure of the tip of the shaft,
FIG. 5 is an explanatory view showing a use state of the shaft connection assisting device, showing a state in which the snap ring is contracted and deformed;
FIG. 6 is an explanatory view showing a state in which the shaft is inserted into the connection hole on the driven side.
FIG. 7 is an explanatory view corresponding to FIG. 5 and showing a state in which the snap ring is contracted and deformed, as viewed from the axial direction of the shaft.
With reference to FIGS. 1 to 7, a method of using and an operation of the shaft connection assisting device according to the present invention will be described.
[0021]
A snap ring 6 in which a metal wire is formed in a substantially circular shape (C shape) is mounted in a mounting groove 50 provided near a tip end of a spline portion 51 of the shaft 5. The outer diameter of the snap ring 6 is slightly larger than the outer diameter of the spline portion 51, and the outer peripheral portion protrudes about half of the diameter of the snap ring 6 (diameter of the wire).
[0022]
(1) Turn the gap adjusting screw 3 to move the movable member 2 to appropriately adjust the gap between the pressing members 4 and 4a, and to connect the pressing portions 41 and 42 to the mounting grooves 50 of the shaft 5 6 outside.
(2) The movable member 2 is moved by turning the gap adjusting screw 3, and the fitting portion 43 of each of the pressing portions 41 and 42 is brought into contact with the outside of the snap ring 6. That is, all four points of the fitting portion 43 come into contact with each other.
[0023]
(3) The movable member 2 is moved and tightened by turning the gap adjusting screw 3, and the snap ring 6 is pressed from the outside by the pressing portions 41 and 42 to be reduced and deformed. As described above, since the snap ring 6 is pressed from the outside by the four pressing portions 41 and 42, the snap ring 6 is reduced and deformed while maintaining a state close to a circle. Thus, when the snap ring 6 is fitted in the mounting groove 50, the outer peripheral portion of the snap ring 6 hardly protrudes from the outer peripheral portion of the spline portion 51 (see FIGS. 5 and 7).
[0024]
(4) The tip of the shaft 5 is inserted into the connection hole 72 of the driven member 7 so that the spline portion 51 is aligned with the spline portion 71 while the snap ring 6 is pressed by the pressing portions 41 and 42. At this time, since the outer peripheral portion of the snap ring 6 does not protrude from the outer peripheral portion of the spline portion 51, the snap ring 6 can be inserted smoothly without difficulty. The pressing portions 41 and 42 stop by hitting the opening edge of the connection hole 72. However, when the shaft 6 is further pressed, the snap ring 6 is disengaged from the fitting portion 43, and further at the distal end side of the fitting portion 43. The shaft 5 can be smoothly inserted because it is pressed and becomes small in diameter and moves in that state (see FIG. 6).
[0025]
(5) When the tip of the shaft 5 is further inserted, the snap ring 6 expands at the fitting groove 70 provided in the connection hole 72, and the shaft 5 is connected to the connection hole 72 without falling off. . In addition, since the spline portions 51 and 71 match, the rotational force of the shaft 5 can be transmitted to the driven member 7.
[0026]
It should be noted that the terms and expressions used in the present specification are merely illustrative and not restrictive, and do not exclude terms and expressions equivalent to the above-mentioned terms and expressions. Further, the present invention is not limited to the illustrated embodiment, and various modifications can be made within the scope of the technical idea.
[0027]
【The invention's effect】
The present invention has the above configuration and has the following effects.
(A) In the shaft connection assisting device according to the present invention, the pressing means is moved by the distance adjusting means to press the snap ring from the outside to reduce and deform the snap ring. By not protruding from the part, the operation of connecting the shafts in various machines such as a drive shaft of an automobile can be performed quickly and easily.
[0028]
(B) The pressing means is provided on each of the base member and the movable member, and the distance between the pressing means is adjusted by moving the movable member to adjust the distance from the base member. If a plurality of means are provided, the snap ring is pressed from outside by at least four or more pressing means.
Thus, when the snap ring is reduced and deformed, a circular state or a state close to a circular shape can be maintained. Therefore, the snap ring does not protrude from the outer peripheral surface of the shaft, so that the snap ring can be easily inserted into the connection hole.
[0029]
(C) When the pressing means is provided with a fitting portion to be fitted into the snap ring, when the pressing means is brought into contact with the outer peripheral portion of the snap ring, the fitting portion is fitted so that the contact portion slips. Does not come off. Therefore, the connecting operation can be performed more accurately and quickly.
[Brief description of the drawings]
FIG. 1 is a perspective view showing one embodiment of a shaft connection assisting device according to the present invention.
FIG. 2 is a plan view of the shaft connection assisting device shown in FIG.
FIG. 3 is a front view of the shaft connection assisting device shown in FIG. 1;
FIG. 4 is an explanatory view showing a structure of a tip portion of a shaft.
FIG. 5 is an explanatory view showing a use state of the shaft connection assisting device and showing a state in which the snap ring is contracted and deformed.
FIG. 6 is an explanatory view showing a state where a shaft is inserted into a connection hole on a driven side.
FIG. 7 is an explanatory view corresponding to FIG. 5 and showing a state in which the snap ring is contracted and deformed, as viewed from the axial direction of the shaft.
[Explanation of symbols]
A Shaft connection assisting device 1 Base member 10 Base 11, 12 Side 13 Guide hole 14 Screw hole 2 Movable member 20 Base 21 Side 22, 23 Mounting holes 24, 25 Bolt 26 Mounting hole 3 Interval adjusting screw 30 Screw portion 31 Knob Tools 4, 4a Pressing body 40 Base 41, 42 Pressing part 43 Fitting part 44 Abutment side 49 Fixing screw 5 Shaft 50 Mounting groove 51 Spline part 6 Snap ring 7 Follower side member 70 Fitting groove 71 Spline part 72 Connection hole

Claims (5)

A plurality of pressing means (4, 4a) abutting from outside on a snap ring (6) mounted in a mounting groove (50 ) of the shaft (5) ,
Interval adjusting means (3) for adjusting the interval between the pressing means (4, 4a) ,
With
Pressing means (4, 4a) are provided on the base member (1) and the movable member (2) , respectively, by moving the movable member (2) to adjust the distance to the base member (1) , The spacing between the pressing means (4, 4a) is adjusted,
The snap ring (6) is reduced and deformed by narrowing the interval between the pressing means (4, 4a) ,
Shaft connection assist device. The pressing means (4, 4a) provided on the base member (1) and the movable member (2) are characterized in that they have a plurality of pressing portions (41, 42) , respectively .
The shaft connection assisting device according to claim 1 . It has a base member (1) , a movable member (2) , a spacing adjusting screw (3) and a pressing body (4, 4a) ,
The base member (1) includes a base (10) and side portions (11, 12) provided on both sides thereof ,
A thread (30) of a gap adjusting screw (3) is screwed into one side (11) , and a movable member (2) is rotatably attached to an end of the thread (30) ,
The movable member (2 ) is provided with one pressing body (4) that comes into contact with the snap ring (6) mounted on the mounting groove (50 ) of the shaft (5) from the outside ,
The base member (1 ) is provided with another pressing body (4a) opposite to the pressing body (4) of the movable member (2) ,
It characterized in that it is constituted such that it is reduced deforming the snap ring (6) by narrowing the distance between the pressing means (4, 4a) by turning the spacing adjustment screw (3),
Shaft connection assist device. Base member (1) Has a guide hole parallel to the length direction (13) Is provided,
  Movable member (2) Mounting holes (22,23) Are installed side by side through the mounting holes (22,23) Has a guide hole (13) Bolt through (24,25) Is fixed,
  The shaft connection assisting device according to claim 3. The pressing means (4, 4a) is provided with a fitting portion (43) fitted into the snap ring (6) ,
The shaft connection assisting device according to claim 1, 2, 3, or 4 .

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