JP6178532B1 - E-type retaining ring insertion tool - Google Patents

Abstract

To provide an E-type retaining ring insertion tool capable of stably performing a series of operations for inserting an E-shaped retaining ring and reducing a load on a user. An E-type retaining ring insertion tool 100 according to the present invention has a flat plate fixed to one end of a gripping member 20 with a bifurcated front end, and an E-shaped retaining ring in a groove provided at each of a pair of branched ends. A sandwiching piece 30 that sandwiches the wheel, a first position that engages with the sandwiching piece 30 and relatively closes the distance between the pair of tips, and a second position that relatively separates the distance between the pair of tips. An E-shaped retaining ring insertion tool that includes a sliding plate 40 that slides and inserts an E-shaped retaining ring in a radial direction with respect to an axis that is a work target. The slide plate 40 has a contact portion 41 that comes into contact with the shaft, and slides from the first position to the second position when the contact portion 41 is pressed against the shaft. [Selection] Figure 1

Description

  The present invention relates to an E-type retaining ring insertion tool.

  Various tools have been developed as means for inserting the E-shaped retaining ring into the shaft. For example, an insertion tool having a clamping piece that clamps an E-shaped retaining ring into a groove provided at the tip of a flat plate fixed to one end of a rod-shaped gripping member is widely spread. . When using this insertion tool, the user inserts the clamping piece of the insertion tool into a predetermined position of the take-out device in which a plurality of E-shaped retaining rings are stacked, and sandwiches the E-shaped retaining ring between the clamping pieces. The insertion tool is removed from the take-out device together with the E-shaped retaining ring. Further, the user carries the insertion tool while holding the E-shaped retaining ring, and inserts the insertion tool so as to press the opening of the E-shaped retaining ring against the desired axis from the radial direction. When the insertion of the E-shaped retaining ring is completed, the user pulls out the insertion tool from the shaft.

  Such an insertion tool has a sufficiently strong clamping force so that the E-shaped retaining ring does not fall off in the middle. For this reason, when the E-shaped retaining ring is not clamped at the correct position and is deviated from a predetermined position, the E-shaped retaining ring falls off so as to be repelled with a strong force. Therefore, in order to prevent such a situation from occurring, the user needs to steadily insert the insertion tool into the take-out device, and hold the E-shaped retaining ring so that twisting does not occur in the plane direction of the E-shaped retaining ring. There is.

  In addition, the user needs to insert a holding piece having a strong holding force into the take-out device with a strong force. Further, when the E-shaped retaining ring is inserted into a desired shaft, a stronger force is required because the E-shaped retaining ring is inserted while expanding the opening. When the insertion tool is pulled out after the E-shaped retaining ring is inserted into the desired shaft, a strong force is also required. Therefore, when such a series of operations are repeated, a high load is imposed on the user.

  In order to reduce such a user's load, Patent Document 1 describes that when inserting an E-shaped retaining ring into a shaft groove, both sides of the E-shaped retaining ring are held by a retaining ring holder body and a slide plate. Therefore, an insertion tool that suppresses shaking, dropout, and scattering has been proposed.

  Further, Patent Document 2 proposes an insertion tool in which a tapered slot is provided in a bifurcated holder, and a slide piece slides in the slot to open the holder and hold the E-shaped retaining ring. Yes.

  Patent Document 3 proposes an insertion tool that stably holds an E-shaped retaining ring by providing a disk member for restricting the relative vertical movement between a pair of holder portions. Yes.

Utility Model Registration No. 3147440 Japanese Utility Model Publication No. 01-143360 JP 60-249539 A

  In such a patent document, various proposals for stably holding the E-shaped retaining ring have been made. However, such a proposal does not reduce the load on the user associated with the operation of inserting and pulling the insertion tool into a desired shaft. Therefore, the user's load accompanying a series of work is not solved yet.

  The present invention has been made to solve such a problem, and can stably perform a series of operations for inserting the E-shaped retaining ring, thereby reducing the load on the user who uses the insertion tool. An object of the present invention is to provide an E-type retaining ring insertion tool.

  In the E-type retaining ring insertion tool according to the present invention, the end of the flat plate fixed to one end of the gripping member is bifurcated, and the E-type retaining ring is sandwiched between the grooves provided at the pair of branched ends. A slide plate that engages with the piece and the clamping piece and slides to a first position that relatively closes the distance between the pair of tips and a second position that relatively separates the distance between the pair of tips. And an E-shaped retaining ring insertion tool for inserting an E-shaped retaining ring from a radial direction with respect to a shaft that is a work target, wherein the slide plate has a contact portion that contacts the shaft, When the contact portion is pressed by the shaft, the contact portion slides from the first position to the second position.

  With such a configuration, when the abutting portion is pressed and the slide plate slides to the second position, the clamping piece is separated, and the E-type retaining ring insertion tool can be easily pulled out.

  In this case, it is preferable that the slide plate is biased to the first position when the E-shaped retaining ring is not sandwiched. Thereby, this E-shaped retaining ring insertion tool can maintain a predetermined clamping force when clamping the E-shaped retaining ring.

  The grooves provided at the pair of tips are formed in a V shape or a U shape, and have an outer ridge line along the surface of the E-shaped retaining ring and an outer ridge line along the back surface. Are preferably held respectively. As a result, the clamping force acts evenly in the direction perpendicular to the plane of the E-shaped retaining ring, and the E-shaped retaining ring can be stably clamped.

  Moreover, it is preferable that the said slide plate is extended in the inner diameter side of the said E-shaped retaining ring rather than the said clamping piece in the said 1st position. Accordingly, when the user is carrying an E-type retaining ring insertion tool holding the E-shaped retaining ring, or when the user presses the E-shaped retaining ring against the shaft, Even if a force different from that is applied, the E-type retaining ring can be prevented from falling off.

  Moreover, it is preferable that the said clamping piece can be replaced | exchanged for the shape according to the size of the E-shaped retaining ring to insert. Thereby, the clamping piece corresponding to the several E-shaped retaining ring of a different size can be respectively fixed with respect to one holding member.

  In the present specification, the “E-type retaining ring” is a metal plate having a hollow disk shape and having an opening, and the metal plate from the radial direction of the shaft with respect to the shaft having a circumferential groove. This is a retaining ring that is inserted so as to push and widen the opening in the elastic region. The “radial direction” refers to a direction perpendicular to the length direction of the shaft into which the E-shaped retaining ring is inserted.

According to the present invention, it is possible to provide a E-type retaining ring insertion tool that can stably perform a series of operations for inserting the E-type retaining ring and reduce the load on the user who uses the insertion tool.

2 is an exploded perspective view of an E-type retaining ring insertion tool 100 according to Embodiment 1. FIG. FIG. 6 is a diagram for explaining a change in the position of a slide plate 40 in the E-shaped retaining ring insertion tool 100 according to the first embodiment. 3 is a detailed view of a clamping piece 30 and a slide plate 40 according to the first embodiment. FIG. 2 is a cross-sectional view of a holding piece 30 and a slide plate 40 according to Embodiment 1. FIG. It is a figure for demonstrating the state which inserts an E-shaped retaining ring with the E-shaped retaining ring insertion tool 100 concerning Embodiment 1. FIG. It is a figure for demonstrating the state which inserts an E-shaped retaining ring with the E-shaped retaining ring insertion tool 100 concerning Embodiment 1. FIG. It is a figure for demonstrating the state in which the E-shaped retaining ring was inserted by the E-shaped retaining ring insertion tool 100 concerning Embodiment 1. FIG. FIG. 6 is a view for explaining the position of the slide plate 40 in the E-shaped retaining ring insertion tool 100 according to the first embodiment. FIG. 6 is a diagram for explaining a second position of the slide plate 40 in the E-type retaining ring insertion tool 100 according to the first embodiment. It is an external view of the E-shaped retaining ring insertion tool 200 according to the second embodiment. It is an external view of the holding body 250 in the E-shaped retaining ring insertion tool 200 according to the second embodiment. It is an external view of the receiving piece 290 in the E-shaped retaining ring insertion tool 200 according to the second embodiment. It is a figure for demonstrating the state which inserts an E-shaped retaining ring with the E-shaped retaining ring insertion tool 200 concerning Embodiment 2. FIG. It is a figure for demonstrating the state which inserts an E-shaped retaining ring with the E-shaped retaining ring insertion tool 200 concerning Embodiment 2. FIG. It is a figure for demonstrating the state which inserts an E-shaped retaining ring with the E-shaped retaining ring insertion tool 200 concerning Embodiment 2. FIG.

Embodiment 1
Embodiment 1 of the present invention will be described below with reference to the drawings. 1 is an exploded perspective view of an E-type retaining ring insertion tool according to Embodiment 1. FIG. The E-type retaining ring insertion tool 100 includes a gripping portion 20, a clamping piece 30, a slide plate 40, a first stepped shaft 50, a second stepped shaft 60, and a screw 70.

  The gripping part 20 is a gripping member for a user to grip when using the E-shaped retaining ring insertion tool 100. Although the gripping part 20 has a rod-like form, various forms can be adopted depending on the purpose of the user to grip. The gripping portion 20 is formed of, for example, resin, rubber, or elastomer. Moreover, the gripping part 20 has a screw hole 21 to which a screw 70 is screwed. A metal member may be embedded in the screw hole 21 by means such as press fitting, insert molding, or adhesion. The gripping portion 20 is screwed with a screw 70 in a state where the clamping piece 30 is joined. Thereby, the upper part of the clamping piece 30 is extended from one end of the gripping part 20. In the first embodiment, the gripping portion 20 may be any one that allows the user to use the E-shaped retaining ring insertion tool 100, and the shape, material, and the like are not limited to those described above. In FIG. 1, the gripping portion 20 has two screw holes 21, but may be one or three or more as long as the clamping piece 30 can be fixed.

  The sandwiching piece 30 is a member that sandwiches an E-shaped retaining ring in a groove provided at each of a pair of branched ends, where the tip of the flat plate is bifurcated. The clamping piece 30 is formed of a metal plate having elasticity. The material of the metal plate is, for example, stainless steel. The clamping piece 30 has a hole 37, and is fixed to the gripping part 20 by a screw 70 being inserted and screwed into the gripping part 20. Further, the tip on the side opposite to the side fixed to the gripping part 20 is bifurcated. A pair of tips branched into two branches presents a first clamping part 33 and a second clamping part 34. The clamping piece 30 has a groove 32 in each of the first clamping part 33 and the second clamping part 34. The groove 32 is formed in a V shape or a U shape. The clamping piece 30 has a first hole 35 in the first clamping part 33 and a second hole 36 in the second clamping part 34. A first stepped shaft 50 is fixed to the first hole 35. Similarly, a second stepped shaft 60 is fixed in the second hole 36. Further, the sandwiching piece 30 is arranged in such a manner that the main surfaces of the slide plate 40 are in contact with each other, and the first stepped shaft 50 and the second stepped shaft are in a slidable state. 60 is engaged.

  The slide plate 40 is a plate-like member that is disposed so as to be stacked with the sandwiching pieces 30 on the flat plate and that is slidably engaged with the sandwiching pieces 30. The slide plate 40 is slidably fixed to the sandwiching piece 30 by the first stepped shaft 50 and the second stepped shaft 60. The slide plate 40 can move between the first position and the second position with respect to the sandwiching piece 30. When the slide plate 40 is in the first position, the slide plate 40 relatively brings the gap between the pair of tips of the sandwiching piece 30 closer. Further, when the slide plate 40 is in the second position, the slide plate 40 relatively separates the gap between the pair of tips of the holding piece 30. Further, the slide plate 40 has a contact part 41, a first stopper part 43, a second stopper part 44, a first hole 45, and a second hole 46.

  The abutting portion 41 is a portion that abuts the work target shaft to which the E-shaped retaining ring is attached after the E-shaped retaining ring insertion tool 100 inserts the E-shaped retaining ring. The abutting portion 41 abuts on the shaft, receives the reaction force from the shaft, and is pressed, whereby the slide plate 40 slides from the first position to the second position.

  The contact portion 41 extends between a first clamping portion 33 that is a pair of distal ends of the clamping piece 30 and a second clamping portion 34. The contact portion 41 is a straight line that passes through the center of the inner circumference of the E-shaped retaining ring in a state where the E-shaped retaining ring insertion tool 100 holds the E-shaped retaining ring and is parallel to the direction in which the E-shaped retaining ring is inserted. Above, it extends so as to contact the shaft to which the E-shaped retaining ring is attached. In order to establish such a contact relationship, the contact portion 41 protrudes in an arc shape on the side opposite to the insertion direction of the E-shaped retaining ring.

  The 1st stopper part 43 and the 2nd stopper part 44 suppress the omission of the E-shaped retaining ring currently clamped, when the slide plate 40 is located in a 1st position. Each of the first stopper portion 43 and the second stopper portion 44 protrudes upward in FIG. 2 from the main body of the slide plate 40. Further, the first stopper portion 43 and the second stopper portion 44 are slightly inside the receiving area of the E-shaped retaining ring formed by the first clamping portion 33 and the second clamping portion 34 of the clamping piece 30. , Their ends are located. Thereby, the 1st stopper part 43 and the 2nd stopper part 44 can contact | abut to a part of main surface of an E-shaped retaining ring in a 1st position.

  The first hole 45 serves as a fulcrum when the engaging portion 51 of the first stepped shaft 50 is inserted and the slide plate 40 slides. The second hole 46 is inserted through the engaging portion 61 of the second stepped shaft 60. The second hole 46 has a rectangular shape and is configured such that the relative positional relationship of the engaging portions 61 can be changed within a predetermined range. That is, when the engaging part 61 moves the position of the rectangular hole of the second hole 46, the slide plate 40 moves between the first position and the second position.

  The first stepped shaft 50 has an engaging portion 51 and a flange portion 52. The engaging portion 51 is inserted into the first hole 45 of the slide plate 40 and the first hole 35 of the holding piece 30 and is fixed to the holding piece 30. For example, the first stepped shaft 50 is fixed by caulking, bonding, or welding the engaging portion 51 and the first hole 35 of the sandwiching piece 30.

  The second stepped shaft 60 has an engaging portion 61 and a flange portion 62. The engaging portion 61 is inserted into the second hole 46 of the slide plate 40 and the second hole 36 of the holding piece 30 and is fixed to the holding piece 30. The second stepped shaft 60 is fixed by, for example, caulking, bonding, or welding the engaging portion 61 and the second hole 36 of the clamping piece 30.

  When the first stepped shaft 50 and the second stepped shaft 60 are fixed to the sandwiching piece 30, the distance between the flange portion 52 of the first stepped shaft 50 and the sandwiching piece 30, and the The interval between the flange portion 62 of the second stepped shaft 60 and the clamping piece 30 has such a size that the slide plate 40 can be slidably engaged without rattling. The flange 52 and the flange 62 have a size that covers the first hole 45 and the second hole 46, respectively. Therefore, it is possible to give an impression that the user has an orderly appearance without recognizing the difference in size between the first hole 45 and the second hole 46.

  The screw 70 is screwed into the screw hole 21 of the gripping part 20 after being inserted through the hole 37 of the clamping piece 30. The screw 70 may be a general screw, but it is possible to employ a countersunk screw that is subjected to a countersunk process on the hole 37 of the sandwiching piece 30 and is fitted to the hole. By doing so, the screw head does not protrude from the main surface of the clamping piece 30. Therefore, since the freedom degree at the time of using the E-shaped retaining ring insertion tool 100 increases, workability | operativity can be improved.

  The sandwiching piece 30, the slide plate 40, the first stepped shaft 50, and the second stepped shaft 60 can be handled as a set of assemblies corresponding to an E-shaped retaining ring having a predetermined diameter. It has become. Further, the sandwiching piece 30 and the gripping part 20 can be disassembled by removing the screw 70. In other words, the E-type retaining ring insertion tool 100 corresponds to the size of the E-shaped retaining ring inserted by the assembly described above, and can be replaced with a shape corresponding to the size of the E-shaped retaining ring to be inserted. . Thereby, the clamping piece corresponding to the several E-shaped retaining ring of a different size with respect to one holding member can each be fixed.

  Moreover, what has the elasticity of a leaf | plate spring can be employ | adopted for the clamping piece 30. FIG. Thereby, the E-shaped retaining ring insertion tool 100 can be used with the clamping piece 30 maintained in a bent state. Accordingly, the degree of freedom in the operation of inserting the E-shaped retaining ring is increased.

  Next, details of the first position and the second position of the slide plate 40 will be described with reference to FIG. FIG. 2 is a diagram for explaining a change in the position of the slide plate in the E-type retaining ring insertion tool according to the first embodiment. FIG. 2A shows a state in which the slide plate 40 is located at the first position. FIG. 2B shows a state in which the slide plate 40 is located at the second position. Incidentally, in explaining the drawings after FIG. 2, xyz coordinates are set. In FIG. 2, the left-right direction of the paper surface is the x-axis, the vertical direction of the paper surface is the y-axis, and the direction perpendicular to the paper surface is the z-axis. In the z-axis, the direction from the back to the front of the page is a plus direction. The xyz coordinates are convenient for explaining the positional relationship between the components. The z-axis direction in FIG. 2 and the z-axis direction in FIGS.

  As shown in FIG. 2A, the first hole 45 of the slide plate 40 and the engaging portion 51 of the first stepped shaft 50 are rotatably engaged to such an extent that there is no backlash. The second hole 46 of the slide plate 40 is a rectangular hole having a width H1 and a width H2. The engaging portion 61 of the second stepped shaft 60 is engaged in the second hole 46. The width H1 of the second hole 46 is substantially the same as the diameter of the engaging portion 61, and has a gap so as not to rattle. The width H2 of the second hole 46 has a width that allows the engaging portion 61 to reciprocate between the first position and the second position. As shown in FIG. 2A, in the slide plate 40, the engaging portion 61 of the second stepped shaft 60 is positioned at the end on the negative side of the y axis in the second hole 46 in the first position. doing. In the first position, the interval between the engaging portion 51 of the first stepped shaft 50 and the engaging portion 61 of the second stepped shaft 60 is the interval L1. In the first position, the interval between the first clamping portion 33 and the second clamping portion 34 of the clamping piece 30 is the interval W1. On the other hand, as shown in FIG. 2B, the slide plate 40 has an engagement portion 61 of the second stepped shaft 60 at the end on the y-axis plus side in the second hole 46 in the second position. Is located. In the second position, the interval between the engaging portion 51 of the first stepped shaft 50 and the engaging portion 61 of the second stepped shaft 60 is the interval L2. In the second position, the interval between the first clamping portion 33 and the second clamping portion 34 of the clamping piece 30 is the interval W2.

  Here, as shown in FIG. 2, the second hole 46 extends in the x-axis plus direction as it goes in the y-axis plus direction. Accordingly, the distance between the first hole 45 (the engaging portion 51 of the first stepped shaft 50) and the engaging portion 61 of the second stepped shaft 60 in the second hole 46 is the first interval. The distance L2 at the second position is larger than the distance L1 at the position. Therefore, the interval W1 between the first clamping unit 33 and the second clamping unit 34 in the first position, and the interval between the first clamping unit 33 and the second clamping unit 34 in the second position. Compared with W2, the interval W2 is larger. In the first position, a predetermined clamping force can be generated to clamp the predetermined E-shaped retaining ring. On the other hand, in the second position, since the distance between the first clamping part 33 and the second clamping part 34 increases, the E-type retaining ring insertion tool 100 can be easily detached from the predetermined E-shaped retaining ring. be able to.

  In addition, although the detail was demonstrated about the 1st position and the 2nd position of the slide plate 40, the structure of the slide plate 40 and the clamping piece 30 is not restricted to this. That is, if the interval between the first clamping part 33 and the second clamping part 34 is changed, for example, even if the first hole 45 and the second hole 46 are respectively formed with cam grooves. good. Alternatively, the slide plate 40 may be provided with a shaft and the holding piece 30 may be provided with a hole.

  In the E-type retaining ring insertion tool 100 according to the first embodiment, when no external force is applied, the interval between the first clamping unit 33 and the second clamping unit 34 is the interval W1. That is, in the E-shaped retaining ring insertion tool 100, when the E-shaped retaining ring is not sandwiched, the slide plate 40 is separated from both members that maintain the distance between the first sandwiching portion 33 and the second sandwiching portion 34. , Biased to the first position. Thus, the E-shaped retaining ring insertion tool 100 is defined by the restoring force of the sandwiching piece 30 itself between the first sandwiching portion 33 and the second sandwiching portion 34 when sandwiching the E-shaped retaining ring. The predetermined clamping force can be maintained.

  Next, a state where the E-shaped retaining ring insertion tool 100 holds the E-shaped retaining ring will be described with reference to FIG. FIG. 3 is a detailed view of the holding piece 30 and the slide plate 40 according to the first embodiment. A two-dot chain line indicates the E-shaped retaining ring 101. As shown in FIG. 3, the E-shaped retaining ring insertion tool 100 holds the outer diameter portion of the E-shaped retaining ring 101 over half or more of the circumference. In this state, the distance between the first clamping part 33 and the second clamping part 34 is slightly widened in the direction away from each other because the E-shaped retaining ring 101 is clamped. That is, in a state where the E-shaped retaining ring insertion tool 100 is sandwiching the E-shaped retaining ring 101, the distance between the first clamping part 33 and the second clamping part 34 is slightly larger than the distance W0. Is smaller than the interval W1. At this time, the first clamping part 33 and the second clamping part 34 are in the direction in which the E-shaped retaining ring 101 is clamped by elastic force (restoring force), that is, the first clamping part 33 and the second clamping part. The portion 34 is urged in a direction in which they approach each other. The E-shaped retaining ring insertion tool 100 clamps the E-shaped retaining ring 101 by this force.

  Next, the details of the principle of holding the E-shaped retaining ring in the thickness direction of the sandwiching piece 30 will be described with reference to FIG. FIG. 4 is a cross-sectional view of the sandwiching piece and the slide plate according to the first embodiment. FIG. 4 shows a cut surface along line IV in FIG.

  A groove 32 is formed at the tip of the sandwiching piece 30. FIG. 4 shows a V-shaped groove 32 as an example. The groove 32 is formed with an arbitrary angle A of less than 90 degrees with respect to the y-axis direction. As a result, the sandwiching piece 30 comes into contact with the ridgeline (corner along the point 38a) and the ridgeline (corner along the point 38b) of the outer shape of the E-shaped retaining ring 101, respectively. Therefore, the clamping piece 30 can stably clamp the E-shaped retaining ring 101 in the thickness direction. The shape of the groove 32 is not limited to the V shape, and may be a U shape.

  Then, the thickness of the clamping piece 30 is demonstrated. As shown in FIG. 4, the clamping piece 30 is a plate-like member having a thickness B2. Specifically, the thickness B2 is, for example, the thickness B1 of the E-shaped retaining ring 101 plus about 0.3 to 0.5 millimeters. That is, in the state in which the holding piece 30 holds the E-shaped retaining ring 101, the step in the z-axis direction between the main surface of the E-shaped retaining ring 101 and the main surface of the holding piece 30 is about 0.15 to 0.25 mm. It will be about.

  Next, the functions of the first stopper portion 43 and the second stopper portion 44 that the slide plate 40 has will be described with reference to FIGS. 3 and 4. As shown in FIG. 3, the slide plate 40 is located at the first position in a state where the E-shaped retaining ring insertion tool 100 holds the E-shaped retaining ring 101. At this time, the first stopper portion 43 and the second stopper portion 44 included in the slide plate 40 are more E-shaped than the first clamping portion 33 and the second clamping portion 34 included in the clamping piece 30. 101 extends to the inner diameter side. As shown in FIG. 3, in the first embodiment, the first stopper portion 43 and the second stopper portion 44 extend so as to overlap half of the outer circumference of the E-shaped retaining ring.

  As shown in FIG. 4, when an external force is applied in the direction of the arrow R1 with respect to the distal end portion (upper end portion in the y-axis plus direction) of the E-shaped retaining ring 101, the E-shaped retaining ring 101 and the first clamping portion A strong reaction force is applied to the point 39a where 33 and the second clamping part 34 are in contact. On the other hand, the reaction force corresponding to the external force does not work in the groove 32 at the lower end (y-axis minus direction) of the E-shaped retaining ring 101. Therefore, a rotational moment is applied to the E-shaped retaining ring 101 with the x-axis direction near the point 39a as the rotational center. Therefore, force is applied to the lower end of the E-shaped retaining ring in the direction of arrow R12. Accordingly, a force is applied to the point 38 b of the E-shaped retaining ring 101 in a direction approaching the first stopper portion 43. Therefore, even if the lower end of the E-shaped retaining ring 101 is disengaged from the groove 32 of the clamping piece 30, it comes into contact with the first stopper portion 43. On the other hand, when an external force is applied in the direction of the arrow R2 to the tip of the E-shaped retaining ring 101, a force is applied in the direction of the arrow R22 at the point 39b of the E-shaped retaining ring 101. For this reason, even if the E-shaped retaining ring 101 is disengaged from the groove 32 of the sandwiching piece 30, it contacts the first stopper portion 43 at the point 39b. As described above, when an external force is applied to the E-shaped retaining ring 101 and a force in the z-axis direction is applied to the E-shaped retaining ring 101, the first stopper portion 43 prevents the E-shaped retaining ring 101 from falling off. To do. The second stopper portion 44 that is symmetrical with the first stopper portion 43 also exhibits the same operations and effects as described above.

  In addition, the 1st stopper part 43 and the 2nd stopper part 44 should just be extended so that it may contact | abut at least one part of an E-shaped retaining ring. However, as described above, it preferably extends so as to overlap half of the outer circumference of the E-shaped retaining ring. Thereby, the E-shaped retaining ring insertion tool 100 can more stably suppress the dropout of the E-shaped retaining ring.

  Further, as shown in FIGS. 3 and 4, the flat slide plate 40 is engaged with the first clamping portion 33 and the second clamping portion 34. Therefore, it is suppressed that the 1st clamping part 33 and the 2nd clamping part 34 raise | generate a position shift in az axis direction. Therefore, in the E-type retaining ring insertion tool 100 according to the first embodiment, the first retaining part 33 and the second sandwiching part 34 of the sandwiching piece 30 receive an external force in the twisting direction, so that the E-shaped retaining ring. 101 can be prevented from falling off.

  Next, referring to FIGS. 5 to 9, the E-shaped retaining ring insertion tool 100 according to the first embodiment is used to insert the E-shaped retaining ring into the shaft, and the E-shaped retaining ring insertion tool 100 is pulled out. The state up to will be described.

  FIG. 5 is a diagram for explaining a state in which the E-shaped retaining ring is inserted by the E-shaped retaining ring insertion tool according to the first embodiment. In a state where the E-shaped retaining ring 101 is sandwiched between the E-shaped retaining ring insertion tool 100, the user presses the opening of the E-shaped retaining ring 101 against the groove portion of the shaft 102, so that the y-axis direction plus direction, that is, the shaft Push in the E-type retaining ring insertion tool 100 in the radial direction. In this state, the opening of the E-shaped retaining ring 101 has a width E1, and the groove of the shaft 102 has an outer diameter E2. The width E1 is smaller than the outer diameter E2. Therefore, the E-shaped retaining ring 101 is inserted into the shaft 102 while expanding in the directions of the arrows D1 and D2 within the range of elastic deformation. Note that, as described with reference to FIG. 3, in this state, the slide plate 40 is located at the first position.

  Next, a state in which the E-shaped retaining ring 101 further proceeds will be described with reference to FIG. FIG. 6 is a diagram for explaining a state in which the E-shaped retaining ring is inserted by the E-shaped retaining ring insertion tool according to the first embodiment. When the user pushes the E-shaped retaining ring insertion tool 100 in the y-axis plus direction, the inner diameter portion of the E-shaped retaining ring 101 gets over the outer diameter of the groove portion of the shaft 102 at a predetermined position. When the E-shaped retaining ring 101 gets over the outer diameter of the groove portion of the shaft 102, the E-shaped retaining ring 101 tends to deform in the direction of closing the opening by its own elastic force (restoring force). Therefore, the E-shaped retaining ring 101 moves in the directions of arrows D3 and D4. That is, the E-shaped retaining ring 101 itself moves in the y-axis plus direction.

  Next, a state where the E-shaped retaining ring 101 is inserted will be described with reference to FIG. FIG. 7 is a diagram for explaining a state in which the E-shaped retaining ring is inserted by the E-shaped retaining ring insertion tool according to the first embodiment. As described above, when the E-shaped retaining ring 101 is inserted further from a predetermined position, the E-shaped retaining ring 101 advances in the y-axis plus direction by its own elastic force (restoring force). In FIG. 7, the E-shaped retaining ring 101 is settled at a position where the insertion has been completed with respect to the shaft 102. In this state, the point 38a and the point 38b which are the ends on the negative side of the y axis on the ridge line of the E-shaped retaining ring 101 and the groove 32 of the sandwiching piece 30 have a gap G1. That is, in FIG. 7, the E-shaped retaining ring insertion tool 100 is in a state where it can be further pushed in the y-axis direction by the interval G1.

  Next, the movement of the slide plate 40 after the insertion of the E-shaped retaining ring 101 will be described with reference to FIGS. A mechanism having the sandwiching piece 30 and the slide plate 40 described here as main components is referred to as a push-open mechanism. FIG. 8 is a diagram for explaining the position of the slide plate 40 in the E-shaped retaining ring insertion tool 100 according to the first embodiment. The user further pushes the E-shaped retaining ring insertion tool 100 in the y-axis plus direction from the state described in FIG. Then, the contact portion 41 of the slide plate 40 contacts the shaft 102. Here, the contact portion 41 is pressed from the shaft 102 in the direction of the arrow 41b. When the contact portion 41 is pressed by the method of the arrow 41b, a rotational moment is generated on the slide plate 40 with the engaging portion 51 of the first stepped shaft 50 as the rotation center. Accordingly, at the point where the second hole 46 and the engaging portion 61 of the second stepped shaft 60 that engages with the second hole 46 are in contact, the engaging portion 61 is moved to the arrow 30b. The pressing force works in the direction of. In other words, the second clamping part 34 of the clamping piece 30 receives a force that deforms in the direction away from the first clamping part 33. Further, in this state, the point 38a and the point 38b that are the ends on the negative side of the y axis in the ridge line of the E-shaped retaining ring 101 and the groove 32 of the holding piece 30 have a gap G2. That is, in FIG. 8, the E-shaped retaining ring insertion tool 100 can be further pushed in the y-axis direction by the interval G2.

  FIG. 9 is a diagram for explaining a second position of the slide plate in the E-type retaining ring insertion tool according to the first embodiment. When the user further pushes the E-shaped retaining ring insertion tool 100 in the positive y-axis direction, the contact portion 41 is further pushed in the direction of the arrow 41b. Then, the slide plate 40 rotates with the engaging portion 51 as the rotation center. As a result, as shown in FIG. 9, the slide plate moves to the second position. In the second position, as described with reference to FIG. 2B, the interval between the first clamping portion 33 and the second clamping portion 34 of the clamping piece 30 is the interval W2. Yes. The interval W2 is approximately the same as the outer diameter of the E-shaped retaining ring 101, for example. Alternatively, the interval W2 may be about 0.2 millimeters smaller than the outer diameter of the E-shaped retaining ring 101, or about 0.2 millimeters larger than the outer diameter of the E-shaped retaining ring 101. Also good.

  With such a configuration, the user can easily pull out the E-shaped retaining ring insertion tool 100 in the y-axis minus direction after inserting the E-shaped retaining ring 101. The user can also pull out the E-shaped retaining ring insertion tool 100 in the z-axis plus direction. Therefore, according to this embodiment, it is possible to stably perform a series of operations for inserting the E-shaped retaining ring, and to provide an E-shaped retaining ring insertion tool that reduces the load on the user who uses the insertion tool. it can.

Embodiment 2
Subsequently, Embodiment 2 of the present invention will be described with reference to FIGS. The E-type retaining ring insertion tool 200 is a pliers type E-shaped retaining ring insertion tool. Hereinafter, the points common to the first embodiment will be described while being omitted as appropriate. FIG. 10 is an external view of an E-shaped retaining ring insertion tool 200 according to the second embodiment. FIG. 10A is a front view of the E-type retaining ring insertion tool 200 according to the second embodiment. FIG. 10B is a side view of the E-shaped retaining ring insertion tool 200 according to the second embodiment. The E-type retaining ring insertion tool 200 includes a first holding member 210, a second holding member 220, a spring 240, a holding body 250, and a receiving piece 290.

  Note that xyz coordinates are shown in FIG. The x-axis plus direction is the right direction of the page. The y-axis plus direction is the upward direction on the page. The z-axis plus direction is a front direction perpendicular to the paper surface. As a matter of course, the right-handed xyz coordinates shown in FIGS. 10 to 15 are convenient for explaining the positional relationship between the components. The z-axis direction in FIG. 10 and the z-axis direction in FIGS.

  The first holding member 210 has a handle 211 at one end and a locking portion 213 at the other end. Further, a screw 214 is screwed into the locking portion of the first gripping member 210. The screw 214 is inserted into the hole 252 of the holding body 250 and then screwed into the first gripping member 210 to lock the holding body 250.

  The first gripping member 210 is bent at a substantially right angle at the intermediate portion from the handle 211 toward the locking portion 213, and the longitudinal direction of the grip 211 and the longitudinal direction of the locking portion 213 are substantially parallel. It is bent again to become.

  The second gripping member 220 has a handle 221 at one end and a locking portion 223 at the other end. Further, a screw 224 is screwed into the locking portion of the second gripping member 220. The screw 224 is inserted into the hole 291 of the receiving piece 290 and then screwed into the second gripping member 220 to lock the receiving piece 290.

  The second gripping member 220 is bent at a substantially right angle at the intermediate portion from the grip 221 toward the locking portion 223, and the longitudinal direction of the grip 221 and the longitudinal direction of the locking portion 223 are substantially parallel. It is bent again to become.

  The first grip member 210 and the second grip member 220 have substantially similar shapes as described above. The first gripping member 210 and the second gripping member 220 are pivotally supported in a direction facing each other at a fulcrum 230 at each intermediate portion and rotatably.

  The second gripping member has a stopper 222 in the vicinity of the fulcrum 230. The stopper 222 has a convex shape protruding from the main surface of the second gripping member 220. The stopper 222 regulates the opening angle of the first holding member 210 and the second holding member 220. Further, the first holding member 210 and the second holding member 220 are biased in a direction away from each other by the coil spring 240. That is, the relative positions of the first gripping member 210 and the second gripping member 220 are held at positions where the side surfaces of the first gripping member 210 abut against the stopper 222. In other words, the stopper 222 can maintain an opening angle that is easy for the user to operate. In addition, with such a configuration, it is possible to suppress the E-shaped retaining ring insertion tool 200 from opening too much, and to shorten the insertion work time of the E-shaped retaining ring.

  The first holding member 210 and the second holding member 220 are formed by pressing or cutting a stainless steel plate. Further, the stainless steel plate may be subjected to nitriding treatment or carburizing treatment after being pressed or cut, thereby increasing the surface hardness and the rigidity. The handle 211 and the handle 221 are handles when the user grips the E-type retaining ring insertion tool 100, and the surface of the first gripping member 210 and the second gripping member 220 is made of an elastomer or synthetic rubber. It is formed by molding an elastic body.

  The holding body 250 can be removed by loosening the screw 214 screwed in the locking portion 213 and can be replaced with a holding body corresponding to a desired E-shaped retaining ring. Similarly, the receiving piece 290 can be removed by loosening the screw 224 screwed in the locking portion 223, and can be replaced with a receiving piece corresponding to a desired E-shaped retaining ring. Thereby, the clamping piece or receiving piece corresponding to a plurality of E-shaped retaining rings of different sizes can be respectively fixed to one gripping member.

  Next, details of the holding body 250 will be described with reference to FIG. FIG. 11 is an external view of the holding body 250 in the E-type retaining ring insertion tool 200 according to the second embodiment. FIG. 11A is a front view of the holding body 250. FIG. 11B is a side view of the holding body 250.

  The holding body 250 includes a sandwiching piece 251, a slide plate 260, a first stepped shaft 270, and a second stepped shaft 280.

  As for the clamping piece 251, the tip of the flat plate is bifurcated in the same manner as the clamping piece 30 in the E-shaped retaining ring insertion tool 100 according to the first embodiment. More specifically, the sandwiching piece 251 has a first sandwiching portion 253 and a second sandwiching portion 255 via an intermediate portion 254 at the tip, and these are paired to form an E-shaped stopper. Hold the ring. Moreover, the 1st clamping part 253 and the 2nd clamping part 255 have the groove | channel 256, respectively. And the groove | channel 256 hold | maintains the ridgeline of the external shape along the surface of an E-shaped retaining ring, and the ridgeline of the external shape along the back surface, respectively. Moreover, the thickness of the clamping piece 251 is thickness B2 similarly to the clamping piece 30 in the E-shaped retaining ring insertion tool 100 according to the first embodiment.

  The sandwiching piece 251 has a hole 252. The hole 252 is a hole for locking the holding body 250 to the locking portion 213 of the first holding member 210. The hole 252 includes a large-diameter portion and a small-diameter portion. The large-diameter portion is larger than the screw head of the screw 214 screwed in the locking portion 213, and the small-diameter portion is smaller than this. When the holding body 250 is locked to the first holding member 210, first, the large diameter portion of the hole 252 and the screw 214 loosened to a predetermined position are loosely fitted. Subsequently, the holding body 250 is slid to engage the small diameter portion with the screw portion of the screw 214. When the small diameter portion and the fastening portion 15 are engaged, the holding body 250 is fitted into the locking portion 213. After this, the holding body 250 is locked to the locking portion 213 by tightening the screw 214. The locking portion 213 has a recess that matches the outer shape of the holding body 250 with a predetermined clearance. Therefore, after the holding body 250 is locked to the locking portion 213, the shift is unlikely to occur.

  Further, the first stepped shaft 270 and the second stepped shaft 280 are fixed to the sandwiching piece 251. Moreover, the clamping piece 251 is arrange | positioned in the state which piles up with the slide board 260, and is engaged so that sliding is possible. The configurations of the holding piece 251, the slide plate 260, the first stepped shaft 270, and the second stepped shaft 280 are the same as those described in the first embodiment, and thus the description thereof is omitted here. . In the holding body 250 according to the second embodiment, the fulcrum of the slide plate is the engaging portion 281 of the second stepped shaft 280, and the hole 264 provided in the slide plate 260 and the first stepped step. The positional relationship between the shaft 270 and the engaging portion 271 changes relatively. Thereby, the slide plate 260 moves to the first position and the second position. Similarly to the slide plate 40 described in the first embodiment, the slide plate 260 is biased to the first position when the retaining ring is not sandwiched. Thereby, the E-type retaining ring insertion tool 200 can maintain a predetermined clamping force when clamping the E-shaped retaining ring.

  Next, the receiving piece 290 will be described with reference to FIG. The receiving piece 290 is a receiving member that comes into contact with the outer shape of the shaft when the E-shaped retaining ring is inserted into the shaft using the E-shaped retaining ring insertion tool 200. FIG. 12 is an external view of the receiving piece 290 in the E-shaped retaining ring insertion tool 200 according to the second embodiment.

  The receiving piece 290 is a flat member and has a hole 291 and a receiving portion 292. The hole 291 is a hole for locking the receiving piece 290 to the locking portion 223 of the second gripping member 220. The shape and function of the hole 291 are the same as those of the hole 252 of the holding piece 251. Therefore, explanation is omitted here. The receiving portion 292 is a portion that comes into contact with the shaft when the E-shaped retaining ring insertion tool 200 inserts the E-shaped retaining ring into the shaft.

  The thickness of the receiving piece 290 is preferably the same thickness B2 as the sandwiching piece 251 described above. Moreover, when the receiving piece 290 and the clamping piece 251 are each attached to the E-shaped retaining ring insertion tool 200, it is preferable that they are in the same position in the z-axis direction. By doing in this way, the freedom degree at the time of using the E-shaped retaining ring insertion tool 200 improves, and possibility that an operation | work can be performed in a narrow space | interval increases.

  Next, the operation of the E-shaped retaining ring insertion tool 200 will be described with reference to FIGS. A mechanism having the sandwiching piece 251, the slide plate 260, and the receiving piece 290 as main components described here is referred to as a grip open mechanism. FIGS. 13-15 is a figure for demonstrating the state which inserts an E-shaped retaining ring with the E-shaped retaining ring insertion tool 200 concerning Embodiment 2. FIGS. The operating principles of the clamping piece 251 and the slide plate 260 are the same as the contents of the E-type retaining ring insertion tool 100 according to the first embodiment described with reference to FIGS. However, matters relating to the receiving piece 290 are different from those of the first embodiment.

  When inserting the E-shaped retaining ring 101 using the E-shaped retaining ring insertion tool 200, the user first attaches the E-shaped retaining ring 101 to the holding body 250. As shown in FIG. 13, the user sandwiches the shaft 102 between the E-shaped retaining ring 101 held on the holding body 250 and the receiving piece 290 while holding the E-shaped retaining ring 101 on the holding body 250. Further, the user holds the handle 211 and the handle 221 so that the holding body 250 and the receiving piece 290 are brought close to each other. By doing so, the E-shaped retaining ring 101 is inserted into the shaft 102 from the radial direction.

  Subsequently, a state immediately after the E-shaped retaining ring 101 is inserted will be described. FIG. 14 shows a state in which the E-shaped retaining ring 101 is inserted into the shaft 102. In FIG. 14, the contact portion 263 is not in contact with the shaft 102. That is, the slide plate 260 is in the first position, and the interval between the first clamping unit 253 and the second clamping unit 255 is the interval W1. After the E-shaped retaining ring 101 is inserted into the shaft 102, the user operates the first gripping member 210 and the second gripping member 220 so as to bring the holding body 250 and the receiving piece 290 closer to each other. Then, the user presses the contact portion 263 against the shaft 102.

  Next, a state when the E-type retaining ring insertion tool 200 is detached will be described with reference to FIG. In FIG. 15, the contact part 263 is relatively pressed in the y-axis minus direction. That is, the positions of the engaging portion 271 of the first stepped shaft 270 and the hole 264 of the slide plate 260 change relatively. As a result, the slide plate 260 rotates in the direction of the arrow D22 with the engaging portion 281 of the second stepped shaft 280 as a fulcrum, and is located at the second position. Accordingly, the second clamping part 255 is elastically deformed in a direction D21 that is a direction away from the first clamping part 253. Therefore, the interval between the first clamping unit 253 and the second clamping unit 255 is the interval W2.

  In the state of FIG. 15, the user can easily remove the E-type retaining ring insertion tool 200 in the z-axis plus direction. Therefore, according to this embodiment, it is possible to stably perform a series of operations for inserting the E-shaped retaining ring, and to provide an E-shaped retaining ring insertion tool that reduces the load on the user who uses the insertion tool. it can. The push-open mechanism supports the shaft so that the user does not move due to the force of inserting the E-shaped retaining ring when the user inserts the E-shaped retaining ring using the E-shaped retaining ring insertion tool 100. A separate support means is required. On the other hand, in the grip open mechanism, a receiving piece 290 serving as a component supports the shaft. Therefore, the user can use the E-shaped retaining ring insertion tool 200 without supporting means.

  Note that the present invention is not limited to the above-described embodiment, and can be changed as appropriate without departing from the spirit of the present invention.

20 Grasping portion 30, 251 Nipping piece 32 Groove 40, 260 Slide plate 50, 270 First stepped shaft 60, 280 Second stepped shaft 41, 263 Contact portion 43, 44 Stopper portion 100, 200 E type Retaining ring insertion tool 101 E-shaped retaining ring 102 Shaft 210 First gripping member 220 Second gripping member 250 Holding body 290 Receiving piece

Claims (5)

A holding piece for holding an E-shaped retaining ring in a groove provided on each of the pair of branched ends, the tip of a flat plate fixed to one end of the gripping member bifurcated;
A slide plate that engages with the sandwiching piece and slides to a second position that relatively closes the distance between the pair of tips and a second position that relatively spaces the distance between the pair of tips. Prepared,
An E-type retaining ring insertion tool for inserting an E-shaped retaining ring from a radial direction with respect to a shaft to be worked,
The slide plate is
A contact portion that contacts the shaft;
When the abutting portion is pressed against the shaft, it slides from the first position to the second position;
E-type retaining ring insertion tool. The slide plate is
When the E-type retaining ring is not sandwiched, it is biased to the first position.
The E-type retaining ring insertion tool according to claim 1. The grooves provided at the pair of tips are respectively
It is formed in V shape or U shape,
Holding the outer ridge line along the surface of the E-shaped retaining ring and the outer ridge line along the back surface, respectively;
The E-type retaining ring insertion tool according to claim 1 or 2. The slide plate is
In the first position, it extends closer to the inner diameter side of the E-shaped retaining ring than the clamping piece,
The E-type retaining ring insertion tool according to any one of claims 1 to 3. The clamping piece can be replaced with a shape corresponding to the size of the E-shaped retaining ring to be inserted.
The E-shaped retaining ring insertion tool as described in any one of Claims 1-4.

Images