JP2019069480A - E-shaped snap ring insertion tool - Google Patents

Abstract

To provide an E-shaped snap ring insertion tool which allows a user to stably perform a series of works for inserting an E-shaped snap ring and reduces load on the user.SOLUTION: An E-shaped snap ring insertion tool 100 of the present invention is an E-shaped snap ring insertion tool having a pinching piece 30 which has a tip of a plate branched into two and is provided with grooves for pinching an E-shaped snap ring respectively at the pair of branched tips, and a holding member 40 which slidingly engages the sandwiching piece 30 with a first position for relatively bringing the pair of tips closer to each other and a second position for relatively bringing the pair of tips farther from each other. The insertion tool 100 inserts an E-shaped snap ring from the radial direction to a shaft as a work object. The E-shaped snap ring insertion tool 100 slides the pinching piece 30 from the first position to the second position by pressing the holding member so as to further press the E-shaped snap ring against the shaft from a state in which the E-type snap ring is inserted.SELECTED DRAWING: Figure 1

Description

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

  Various tools have been developed as means for inserting an E-shaped retaining ring on the shaft. For example, an insertion tool having a clamping piece in which the tip of a flat plate fixed to one end of a rod-like gripping member is branched into two and the E-shaped snap ring is pinched in a groove provided at the tip is widespread . 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 snap rings are stacked, and clamps the E-shaped snap ring by the clamping pieces Remove the insertion tool from the removal device with the E-shaped retaining ring. Furthermore, the user carries the insertion tool while holding the E-shaped snap ring, and inserts the insertion tool in such a manner that the opening of the E-shaped snap ring is pressed against the desired axis from the radial direction. When the E-shaped retaining ring is completely inserted, the user pulls out the insertion tool from the shaft.

  Also, various proposals have been made to make the means for inserting the E-shaped retaining ring into the shaft simpler. For example, in Patent Document 1, the inventor of the present application discloses in Patent Document 1 a clamping piece for clamping an E-shaped snap ring in a groove provided respectively at a pair of bifurcated tips of a flat plate, and a pair of tips An E-shaped retaining ring insertion tool has been proposed which comprises a slide plate which makes the spacing relatively close or separate. The slide plate has a contact portion that contacts the shaft, and the contact portion slides when the shaft is pressed. In the slide plate, the contact portion is pressed by the shaft and slides, thereby relatively separating the distance between the pair of tips.

Patent No. 6178532

  The inventor of the present application actually produced the E-shaped retaining ring insertion tool described in Patent Document 1 and performed an insertion operation of the E-shaped retaining ring, and found various problems. First of all, in such an E-shaped snap ring insertion tool, after inserting the E-shaped snap ring into the shaft, it is necessary to press the contact portion against the shaft when separating the holding pieces. Therefore, there has been a problem that the slide plate does not function properly if the outer diameter of the shaft into which the E-shaped retaining ring is inserted is too large or too small. Second, there is a possibility that the shaft may be scratched because the shaft is pressed against the contact portion.

  The present invention has been made to solve these problems, and can stably perform a series of operations for inserting an E-shaped retaining ring, and reduces the load on the user who uses the insertion tool. It is an object of the present invention to provide an E-shaped retaining ring insertion tool.

The E-shaped retaining ring insertion tool according to the present invention is
A pinching piece in which the tip of the flat plate is bifurcated and a groove for pinching the E-shaped snap ring is provided on each of the bifurcated pair of tips;
A holding member slidably engaged with a first position where the distance between the pair of tips is made relatively close and a second position where the distance between the pair of tips is relatively separated And
An E-shaped snap ring insertion tool for inserting the E-shaped snap ring in a radial direction with respect to an axis to be worked,
The holding piece is pushed from the first position to the second position by pressing the holding member so as to further press the E-shaped retaining ring against the shaft from the state where the E-shaped retaining ring is inserted.

  With such a configuration, after inserting the E-shaped snap ring, it is possible to press the holding member so as to further press the E-shaped snap ring on the shaft, and to easily remove the E-shaped snap ring insertion tool.

In the E-shaped snap ring insertion tool according to the present invention,
The clamping piece may be located at the first position when the clamping ring is not clamping the E-shaped snap ring.

  With such a configuration, the E-shaped retaining ring insertion tool according to the present invention can easily hold the E-shaped retaining ring.

In the E-shaped snap ring insertion tool according to the present invention,
The sandwiching piece may have a pair of locking portions for respectively engaging the pair of tips with the holding member, and the pair of locking portions may be connected via a U-shaped intermediate portion.

  With such a configuration, the E-shaped snap ring insertion tool according to the present invention has an orderly appearance of an impression, and can suppress an imbalance in elastic force applied to the pair of tips.

In the E-shaped snap ring insertion tool according to the present invention,
The locking portion is a shaft-like member protruding from the main surface of the clamping piece,
The holding member has a pair of slide holes for respectively guiding the pair of locking portions,
The clamping piece may slide between the first position and the second position as the locking portion moves in the slide hole.

  With such a configuration, the E-shaped retaining ring insertion tool according to the present invention can stabilize the operation of the clamping piece.

In the E-shaped snap ring insertion tool according to the present invention,
The grooves respectively provided at the pair of tips are formed in a V-shape or a U-shape, and the ridge line of the outer shape along the surface of the E-shaped snap ring and the ridge line of the outer shape along the back surface , May be held respectively.

  With such a configuration, the E-shaped retaining ring insertion tool according to the present invention can suppress the falling off of the E-shaped retaining ring.

In the E-shaped snap ring insertion tool according to the present invention,
The depth of the groove may be shallow as it gets farther from the tip.

  With such a configuration, the E-shaped snap ring insertion tool according to the present invention can stably perform the operation of removing the E-shaped snap ring insertion tool from the E-shaped snap ring.

In the E-shaped snap ring insertion tool according to the present invention,
The holding member may extend on the inner diameter side of the E-shaped snap ring with respect to the clamping piece in a state in which the pinching piece clamps the E-shaped snap ring.

  With such a configuration, the E-shaped retaining ring insertion tool according to the present invention can suppress the falling off of the E-shaped retaining ring.

In the E-shaped snap ring insertion tool according to the present invention,
A first gripping member having a first handle at one end and a first locking portion for locking the holding member at the other end;
The first grip member is pivotally supported at an intermediate portion relative to each other, and a second locking portion for locking the second handle at one end and a receiving piece for receiving the shaft at the other end And a second gripping member having
When inserting the E-shaped retaining ring, the first gripping member and the second gripping member may be operated to be close to each other.

  With such a configuration, the E-shaped retaining ring insertion tool according to the present invention can stably perform a series of operations for inserting the E-shaped retaining ring, and can reduce the load on the user.

In the E-shaped snap ring insertion tool according to the present invention,
The range in which the receiving piece receives the axis is set so as not to straddle a plane that coincides with at least one of the two main faces of the sandwiching piece in the axial direction of the axis It is also good.

  With such a configuration, the E-shaped snap ring insertion tool according to the present invention can easily remove the E-shaped snap ring insertion tool from the E-shaped snap ring.

In the E-shaped snap ring insertion tool according to the present invention,
The holding member is replaceable to a shape according to the size of the E-shaped retaining ring to be inserted.
The E-shaped retaining ring insertion tool according to claim 8 or 9.

  With such a configuration, the E-shaped snap ring insertion tool according to the present invention can provide an E-shaped snap ring insertion tool corresponding to a plurality of different sized E-shaped snap rings.

In the E-shaped snap ring insertion tool according to the present invention,
One main surface side of the clamping piece may be in contact with the holding member, and the other main surface side of the clamping piece may not have a convex portion.

  Such a configuration improves the degree of freedom when using the E-shaped retaining ring insertion tool.

  In the present specification, the “E-shaped retaining ring” is a metal plate having a hollow disk shape and an opening, and the metal plate from the radial direction of the axis with respect to the axis having a circumferential groove. It is a retaining ring which is inserted in such a way as to expand the opening of the opening within the elastic range.

According to the present invention, it is possible to stably perform a series of operations for inserting the E-shaped snap ring, and to provide an E-shaped snap ring insertion tool which reduces the load on the user who uses the insertion tool.

FIG. 1 is an exploded perspective view of an E-shaped retaining ring insertion tool 100 according to a first embodiment. FIG. 8 is a view for explaining a change in the position of the clamping piece 30 in the E-shaped snap ring insertion tool 100 according to the first embodiment. It is detail drawing of the state which the clamping piece 30 concerning Embodiment 1 clamps E-shaped retaining ring. FIG. 5 is a cross-sectional view of a holding piece 30 and a holding member 40 according to the first embodiment. FIG. 6 is a view 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. FIG. 6 is a view 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. FIG. 8 is a view for explaining the position of the clamping piece 30 in the E-shaped snap ring insertion tool 100 according to the first embodiment. FIG. 18 is an external view of a receiving piece 280 in an E-shaped retaining ring insertion tool 200 according to a second embodiment. FIG. 18 is an external view of a retaining ring insertion portion set 270 in an E-shaped retaining ring insertion tool 200 according to a second embodiment. FIG. 7 is a view for explaining a second position of the holding member 40 in the E-shaped snap ring insertion tool 100 according to the first embodiment. FIG. 16 is a view for explaining a state in which the E-shaped retaining ring is inserted by the E-shaped retaining ring insertion tool 200 according to the second embodiment. FIG. 18 is a view for explaining the position of the clamping piece 230 in the E-shaped snap ring insertion tool 200 according to the second embodiment. It is sectional drawing for demonstrating the movement at the time of removing the E-shaped retaining ring insertion tool concerning Embodiment 2 from an E-shaped retaining ring. FIG. 14 is an external view of an E-shaped retaining ring insertion tool 300 according to a third embodiment. FIG. 18 is an external view of a retaining ring insertion portion set 370 in an E-shaped retaining ring insertion tool 300 according to a third embodiment. FIG. 18 is an external view of a receiving piece 380 in an E-shaped retaining ring insertion tool 300 according to a third embodiment. It is a figure for demonstrating the state to which E type snap ring was inserted by E type snap ring insertion tool 300 concerning Embodiment 3. FIG. It is sectional drawing for demonstrating the movement at the time of removing the E-shaped retaining ring insertion tool concerning Embodiment 3 from an E-shaped retaining ring.

  Embodiments will be described below with reference to the drawings. In the following description and the drawings, the same reference numerals are given to configurations common to a plurality of drawings. Therefore, the description of the components denoted by the same reference numerals will be omitted as appropriate.

  Also, in the following description, the axial direction indicates a direction parallel to the extension direction of the axis into which the E-shaped retaining ring is to be inserted. The radial direction indicates a direction perpendicular to the axial direction of the axis and extending radially from the axis.

Embodiment 1
The first embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is an exploded perspective view of an E-shaped retaining ring insertion tool 100 according to a first embodiment. The E-shaped retaining ring insertion tool 100 is a tool for inserting the E-shaped retaining ring on the shaft. The E-shaped snap ring insertion tool 100 includes a grip portion 20, a holding piece 30, a holding member 40, a screw 50, a slide shaft 60, and a guide shaft. The details of the configuration of each element will be described below.

  The drawings shown below appropriately show right-handed xyz coordinates. These right-handed xyz coordinates are convenient for describing the positional relationship of components. For example, the z-axis direction in FIG. 1 coincides with the z-axis direction in the right-handed system coordinates shown in FIG.

  The details of the holding unit 20 will be described below. The grip portion 20 is a member for the user to grip when using the E-shaped snap ring insertion tool 100. Although the grip portion 20 has a rod-like form, various forms can be adopted depending on the purpose of the user's grasp. The grip portion 20 is formed of, for example, resin, rubber, or an elastomer. The grip 20 has a screw hole 21 for screwing the screw 50. A metal member may be embedded in the screw hole 21 by means such as press fitting, insert molding, or adhesion. The grip portion 20 and the screw 50 sandwich and screw the holding member 40. As a result, the upper portion of the holding member 40 is extended from one end of the grip portion 20.

  In the first embodiment, the grip portion 20 may be anything as long as the user grips the E-shaped snap ring insertion tool 100 when using it, and the shape, material, etc. are not limited to those described above. . Further, in FIG. 1, the grip portion 20 has two screw holes 21. However, as long as the holding member 40 can be fixed, it may be one or three or more.

  The pinching piece 30 is a member in which the tip of the flat plate is bifurcated and the E-shaped snap ring is pinched by grooves respectively provided in a pair of bifurcated tip portions. The sandwiching piece 30 is formed by press-molding a metal plate having elasticity. The material of the metal plate is, for example, iron or stainless steel containing iron as a main component. The sandwiching piece 30 has a groove 32, a tip 33, a first hole 35, a second hole 36, and an intermediate portion 37 as main components.

  The pair of bifurcated tip portions 33 has a concave arc shape along the outer diameter portion of the E-shaped retaining ring, and in this concave arc shape, each has a groove 32 in the thickness direction of the flat plate There is. The groove portion 32 is formed in a V-shape or a U-shape. The pair of tip portions 33 are formed to face each other via the U-shaped intermediate portion 37. With such a shape, the pair of tip end portions 33 sandwich the outer diameter portion of the E-shaped retaining ring in the radial direction. In addition, with such a configuration, the E-shaped snap ring insertion tool 100 has an orderly appearance of an impression, and can suppress an imbalance in elastic force applied to the pair of tip portions 33.

  A pair of first holes 35 is provided on the tip end side of the intermediate portion 37 so as to correspond to the pair of tip portions 33 respectively. That is, the sandwiching piece 30 has two first holes 35 in the vicinity of the tip end portion 33. The slide shafts 60 are engaged with the two first holes 35 respectively. When the slide shaft 60 is engaged with the two first holes 35, the slide shaft 60 passes through the slide holes 45 of the holding member 40. That is, by holding the slide shaft 60 in the first hole 35, the holding piece 30 and the slide shaft 60 hold the holding member 40 therebetween. In other words, the holding member 40 holds the clamping piece 30.

  A second hole 36 is provided in an intermediate portion 37 connecting the pair of distal end portions 33. The guide shaft 63 is engaged with the second hole 36. When the guide shaft 63 is locked in the second hole 36, the guide shaft 63 passes through the guide hole 46 of the holding member 40. That is, when the guide shaft 63 is locked in the second hole 36, the holding piece 30 and the guide shaft 63 hold the holding member 40 therebetween. In other words, the holding member 40 holds the clamping piece 30.

  In addition, one main surface side of the clamping piece 30 is in contact with the holding member. On the other hand, the other main surface side of the sandwiching piece 30 does not have a convex portion. With such a configuration, the degree of freedom in using the E-shaped snap ring insertion tool 100 is improved.

  The slide shaft 60 is inserted into the slide hole 45 of the holding member 40 and is then engaged with the first hole 35 of the sandwiching piece 30. The slide shaft 60 has an engaging portion 61 and a flange portion 62. When the slide shaft 60 is locked to the holding piece 30, the holding member 40 is slidably held between the flange portion 62 of the slide shaft 60 and the main surface of the holding piece 30 without rattling. The engaging portion 61 is slidably engaged with the slide hole 45 relative to a preset direction. That is, the sandwiching piece 30 has a pair of engaging portions 61 for respectively engaging the pair of tip portions 33 with the holding member 40, and the pair of engaging portions 61 are connected via the U-shaped intermediate portion 37 ing. When the engaging portion 61 moves in the slide hole 45, the gripping piece 30 slides between the first position and the second position.

  The slide shaft 60 is locked, for example, by caulking, bonding, or welding the tip end of the engaging portion 61 and the first hole 35 of the holding piece 30. Alternatively, the slide shaft 60 may be configured by forming the holding piece 30 so as to protrude in an axial shape by drawing, burring, or the like.

  The guide shaft 63 is inserted into the guide hole 46 of the holding member 40 and is locked to the second hole 36 of the holding piece 30. The guide shaft 63 has an engaging portion 64 and a flange portion 65. When the guide shaft 63 is locked to the holding piece 30, the holding member 40 is slidably held between the flange portion 65 of the guide shaft 63 and the main surface of the holding piece 30 without rattling. The engagement portion 64 slidably engages with the slide hole 45 relative to a preset direction. The guide shaft 63 is locked, for example, by caulking, bonding, or welding the tip end of the engaging portion 64 and the second hole 36 of the holding piece 30.

  The screw 50 is inserted into the screw hole 41 of the holding piece 30 and screwed into the screw hole 21 of the grip portion 20. The screw 50 may be a general screw, but a countersunk screw process may be performed on the screw hole 41 of the holding piece 30, and a countersunk screw may be adopted. By doing this, it can be suppressed that the screw head protrudes from the main surface of the clamping piece 30. Therefore, the working freedom when using the E-shaped snap ring insertion tool 100 is improved, and the workability can be improved.

  A configuration in which the holding member 40 holds the holding piece 30 in a state in which the holding piece 30 and the slide shaft 60 are locked and in a state in which the holding piece 30 and the guide shaft 63 are locked. Is a retaining ring insertion part set 170. The retaining ring insert 170 can be treated as a set of assemblies corresponding to an E-shaped retaining ring having a predetermined diameter. In addition, the retaining ring insertion portion set 170 and the grip portion 20 can be disassembled by removing the screw 70. That is, the E-shaped retaining ring insertion tool 100 corresponds to the size of the E-shaped retaining ring which the retaining ring insertion portion set 170 inserts. Therefore, the E-shaped retaining ring insertion tool 100 may replace the retaining ring insertion portion set 170 according to the size of the E-shaped retaining ring to be inserted. Thereby, the holding pieces corresponding to a plurality of different sized E-shaped snap rings can be locked to the one holding portion 20 respectively.

  Moreover, the holding piece 30 can employ | adopt what has elasticity of leaf spring shape. Thereby, the E-shaped snap ring insertion tool 100 can use the E-shaped snap ring insertion tool 100 while maintaining the state in which the clamping piece 30 is bent. Therefore, the E-shaped retaining ring insertion tool 100 can improve the degree of freedom in the operation of inserting the E-shaped retaining ring.

  Next, the holding member 40 will be described. The holding member 40 is a member that holds the holding piece 30. The holding member 40 has a holding piece 30 in a first position where the distance between the pair of tip portions 33 is relatively close, and a second position where the distance between the pair of tip portions 33 is relatively apart, Is slidably engaged with the Further, the holding member 40 is locked so as to be integral with the grip portion 20, thereby enabling the user to operate the E-shaped snap ring insertion tool 100.

  The holding member 40 is a plate-like member having a screw hole 41, a stopper 42, a slide hole 45, and a guide hole 46. The holding member 40 is formed, for example, by press-forming a metal plate. The material of the metal plate is, for example, iron or stainless steel containing iron as a main component. The screw 50 is inserted through the screw hole 41, and the inserted screw 50 is screwed into the grip portion 20. Thus, the holding member 40 is integrally locked to the grip portion 20.

  Next, the configuration of the holding member 40 and the change in the position of the holding piece 30 will be described in detail with reference to FIG. FIG. 2 is a view for explaining a change in the position of the clamping piece 30 in the E-shaped snap ring insertion tool 100 according to the first embodiment. FIG. 2A shows a state in which the sandwiching piece 30 is located at the first position. FIG. 2B shows a state in which the holding piece 30 is located at the second position.

  The first position is a state before the E-shaped retaining ring insertion tool 100 clamps the E-shaped retaining ring. In the first position, the distance between the pair of tip portions 33 is relatively close. In the second position, the distance between the pair of tip portions 33 is relatively large. The holding piece 30 and the holding member 40 are slidably engaged. However, the holding piece 30 is set to be positioned at the first position when not holding the E-shaped retaining ring. Thus, the E-shaped retaining ring insertion tool 100 can easily hold the E-shaped retaining ring.

  The holding member 40 has a stopper portion 42. The stopper portion 42 is a concave arc-shaped notch provided to prevent the E-shaped snap ring from coming off the pinching piece 30 when the pinching piece 30 clamps the E-shaped snap ring. Therefore, the stopper portion 42 extends to the inner diameter side of the E-shaped snap ring more than the tip end portion 33 of the sandwiching piece 30 in the first position. Specifically, the width W 0 of the arc-shaped notch of the stopper portion 42 is smaller than the interval W 1 formed by the tip portion 33 of the sandwiching piece 30. In addition, considering that the E-shaped snap ring insertion tool 100 inserts the E-shaped snap ring into the shaft, the width W0 of the notch is larger than the outer diameter of the shaft to be worked. That is, in other words, the stopper portion 42 has a concave arc shape smaller than the outer diameter of the E-shaped retaining ring and larger than the outer diameter of the shaft to be worked.

  The slide hole 45 is a long hole for guiding the slide shaft 60 inserted. The slide hole 45 which is a long hole has a width H1 in the short direction and a width H2 in the longitudinal direction. The slide hole 45 is slidably engaged with the engagement portion 61 of the slide shaft 60 in the short direction without rattling. Further, the slide hole 45 is loosely fitted such that the engaging portion 61 slides in the longitudinal direction.

  The holding member 40 has a pair of slide holes 45 corresponding to the pair of slide shafts 60. The pair of slide holes 45 are respectively inclined with respect to the y-axis direction such that the distance between the slide holes 45 approaches the tip end. Specifically, in FIG. 2A, the pair of slide holes 45 have an inclination of an angle A1. Due to the inclination of the pair of slide holes 45, the distance between the tip portions 33 of the holding pieces 30 changes. In other words, the holding member 40 changes the distance between the tip end portions 33 of the holding pieces 30 by changing the inclination of the pair of slide holes 45 of the holding member 40.

  The guide hole 46 is an elongated hole in which the engaging portion 64 of the inserted guide shaft 63 is provided slidably in the y-axis direction. The guide hole 46, which is a long hole, engages with the engaging portion 64 of the guide shaft 63 without rattling in the x-axis direction. In the guide hole 46, the engaging portion 64 of the guide shaft 63 is loosely fitted in the y-axis direction. The engagement between the guide hole 46 and the guide shaft 63 enables the sandwiching piece 30 to slide stably between the first position and the second position.

  Next, the difference between the first position and the second position of the sandwiching piece 30 will be described with reference to FIG. The first position in which the distance between the pair of tip end portions 33 is relatively close is the state before the E-shaped snap ring insertion tool 100 grips the E-shaped snap ring. In the first position, the sandwiching piece 30 is located closer to the tip, that is, in the y-axis plus direction. In the first position, the engagement portions 61 of the slide shafts 60 are spaced from each other by a distance L1. In the second position, the sandwiching piece 30 is located in the direction away from the tip, that is, in the negative direction of the y-axis. In the second position, the engaging portions 61 of the slide shafts 60 have a distance L2 from each other. The distance L2 between the engaging portions 61 of the slide shaft 60 at the second position is wider than the distance L1 between the engaging portions 61 at the first position.

  The shape of the holding piece 30 is formed such that the distance between the two engaging portions 61 is equal to the distance L1 when no external force is received. Therefore, when the clamping piece 30 receives the external force and is positioned at the second position, an elastic force to restore the clamping piece 30 to the first position acts. The clamping piece 30 is positioned at the first position by an elastic force when not receiving an external force. In addition, the shape of the clamping piece 30 may be shape | molded so that the space | interval of the two engaging parts 61 may become narrower than the space | interval L1, when not receiving external force. In this case, the holding piece 30 is biased in the direction in which the two engaging portions 61 approach each other in the first position.

  In the first position where the gripping pieces 30 are relatively close to the tip, the interval W1 between the tip portions 33 shown in FIG. 2A is set smaller than the outer diameter of the E-shaped snap ring. Further, at the second position where the gripping pieces 30 are relatively far from the tip, the interval W2 between the tip portions 33 shown in FIG. 2B is set larger than the outer diameter of the E-shaped snap ring.

  Next, with reference to FIG. 3, a state in which the E-shaped retaining ring insertion tool 100 holds the E-shaped retaining ring will be described. FIG. 3 is a detailed view of a state in which the holding piece 30 according to the first embodiment holds the E-shaped retaining ring. A two-dot chain line indicates an E-shaped retaining ring 101. As shown in FIG. 3, the E-shaped retaining ring insertion tool 100 clamps 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 pair of tip end portions 33 is slightly expanded in the direction away from each other because the E-shaped snap ring 101 is held therebetween. That is, in a state in which the E-shaped snap ring insertion tool 100 sandwiches the E-shaped snap ring 101, the distance between the pair of tip portions 33 is a distance W3 slightly larger than the distance W1 and smaller than the distance W2. At this time, the pair of tip end portions 33 is urged in a direction in which the E-shaped snap ring 101 is held by an elastic force (restoring force), that is, in a direction C1 in which they approach each other. This force causes the E-shaped retaining ring insertion tool 100 to clamp the E-shaped retaining ring 101 in a direction parallel to the plane of the E-shaped retaining ring.

Next, the function of the groove 32 of the tip 33 will be described with reference to FIG.
FIG. 4 is a cross-sectional view of the sandwiching piece 30 and the holding member 40 according to the first embodiment. FIG. 4A shows a cross section taken along line IV in FIG. FIG. 4B shows a cross section taken along line V in FIG.

  As shown in FIG. 4A, the sandwiching piece 30 has a V-shaped groove 32. The slope of the groove 32 has an arbitrary angle V1 of less than 90 degrees with respect to the main surface of the E-shaped retaining ring. The groove 32 is in contact with the ridgeline along the corner 38a of the outer shape of the E-shaped retaining ring 101 and the ridgeline along the corner 38b. In addition, as described in FIG. 3, the sandwiching piece 30 is biased in the direction C1. Therefore, the elastic force (restoring force) in the direction C1 is converted to a force in the direction C2 perpendicular to the slope of the groove 32 having the angle V1. Therefore, the clamping piece 30 can clamp the E-shaped retaining ring 101 in the direction perpendicular to the main surface of the E-shaped retaining ring or in the thickness direction of the E-shaped retaining ring. The shape of the groove 32 is not limited to the V shape, and may be a U shape.

  Subsequently, the thickness of the sandwiching piece 30 will be described. As shown to Fig.4 (a), the clamping piece 30 is a plate-shaped member of 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 mm. That is, in the state in which the clamping piece 30 clamps the E-shaped snap ring 101, the step in the z-axis direction between the main surface of the E-shaped snap ring 101 and the main surface of the clamping piece 30 is approximately 0.15 to 0.25 mm It becomes degree.

  Next, the depth of the groove 32 will be described. As shown to Fig.4 (a), the groove part 32 has the depth D1 in the cross section of the line segment IV. On the other hand, as shown in FIG. 4B, in the cross section of the line segment V, the groove 32 has a depth D2. At this time, when the depth D1 in the cross section of the line segment IV closer to the tip of the clamping piece 30 and the depth D2 in the cross section of the line segment V farther from the tip of the clamping piece 30 are D2 than D1. Is shallower. That is, the depth of the groove portion 32 is formed to be shallow as it gets farther from the tip.

  Next, returning to FIG. 3, the function of the stopper portion 42 will be described. When a strong external force in the z direction is applied to the E-shaped snap ring 101 pinched by the pinching piece 30, the E-shaped snap ring may come out of the groove 32 and drop out of the pinching piece 30.

  For example, when a force in the negative z-axis direction is applied to the tip portion 101a of the E-shaped retaining ring 101, the tip portion 101a of the E-shaped retaining ring 101 corresponds to the tip portion 101a of the E-shaped retaining ring 101. The tip end portion 42 a of the second end portion contacts the tip end portion 101 a of the E-shaped retaining ring 101.

  Also, for example, when a force in the z-axis positive direction is applied to the tip end portion 101a of the E-shaped retaining ring 101, the middle portion 101b which is a portion far from the tip portion 101a of the E-shaped retaining ring 101 Rotational moment works. In such a case, the middle portion 42 b of the stopper portion 42 corresponding to the middle portion 101 b of the E-shaped retaining ring 101 contacts the middle portion 101 b of the E-shaped retaining ring 101.

  With such a configuration, the E-shaped retaining ring insertion tool 100 can suppress the falling off of the E-shaped retaining ring.

  The stopper portion 42 may extend so as to abut on at least a part of the E-shaped retaining ring 101. However, as mentioned above, it is preferable to extend 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 falling off of the E-shaped retaining ring.

  Further, as shown in FIGS. 3 and 4, the holding members 40 are engaged with the pair of tip portions 33 respectively. Therefore, the positional deviation between the pair of tip portions 33 in the z-axis direction is suppressed. Therefore, the E-shaped snap ring insertion tool 100 according to the first embodiment suppresses the detachment of the E-shaped snap ring 101 when the pair of tip portions 33 of the holding piece 30 receives an external force in the twisting direction. be able to.

  Next, referring to FIG. 5 to FIG. 7, the E-shaped snap ring 101 is inserted into the shaft using the E-shaped snap ring insertion tool 100, and the state from pulling out the E-shaped snap ring insertion tool 100 is described. Do.

  FIG. 5 is a view 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 FIG. 5, the hatched circle indicates the groove of the shaft 102 which is a portion of the shaft 102 into which the E-shaped retaining ring 101 is inserted.

  The user presses the opening of the E-shaped snap ring 101 against the groove of the shaft 102 while holding the E-shaped snap ring 101 in the E-shaped snap ring insertion tool 100, and the direction of the arrow P1 or the y direction plus direction That is, the E-shaped snap ring insertion tool 100 is pushed in the radial direction of the shaft. 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 F1 and F2 within the range of elastic deformation. As described with reference to FIG. 3, in this state, the sandwiching piece 30 is located at the first position.

  Next, the state in which the E-shaped retaining ring 101 is inserted will be described with reference to FIG. FIG. 6 is a view 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 the user pushes the E-shaped snap ring insertion tool 100 in the direction of the arrow P1, the opening of the E-shaped snap ring 101 passes over the outer diameter of the groove of the shaft 102 at a predetermined position. When the E-shaped retaining ring 101 passes over the outer diameter of the groove of the shaft 102, the E-shaped retaining ring 101 is deformed in a direction to close the opening by its own elastic force (restoring force). In this way, the E-shaped retaining ring 101 settles to the position where the insertion is completed with respect to the shaft 102. At this time, the distance between the pair of tip portions 33 of the holding piece 30 is a distance W3.

  Next, the movement of the clamping piece 30 after the insertion of the E-shaped retaining ring 101 will be described with reference to FIG. 7. The mechanism having the holding pieces 30 and the holding member 40 as main components described here is referred to as a push open mechanism. FIG. 7 is a view for explaining the position of the clamping piece 30 in the E-shaped snap ring insertion tool 100 according to the first embodiment.

  The user further pushes the E-shaped retaining ring insertion tool 100 in the direction of the arrow P1 from the state described in FIG. At this time, the user holds the grip portion 20 and presses the holding member 40 integrated with the grip portion 20. That is, the holding member 40 is pressed so as to further press the E-shaped snap ring 101 against the shaft 102 from the state where the E-shaped snap ring 101 is inserted. Then, the clamping piece 30 receives a reaction force from the E-shaped retaining ring 101 in the direction of arrow R1, which is the opposite direction to the arrow P1.

  In response to the reaction force received in the direction of the arrow R1, the engaging portion 61 receives forces in the direction of the arrow R2 (x-axis minus direction) and the direction of the arrow R3 (x-axis plus direction). That is, when the clamping piece 30 receives a force in the direction of R 1 from the E-shaped retaining ring 101, the engaging portion 61 of the slide shaft 60 integrated with the clamping piece 30 contacts the slide hole 45 of the holding member 40. . By contacting the inclined surface 45a of the slide hole 45, the engaging portion 61 receives force in the direction of the arrow R1 and in the direction of the arrow R3. As a result, the sandwiching piece 30 slides along the slide hole 45 from the first position to the second position.

  In FIG. 7, the space | interval of a pair of front-end | tip part 33 which the clamping piece 30 has is the space | interval W4. The interval W4 is wider than the above-mentioned interval W3 and is equal to or less than the interval W2. Further, the distance W4 is, for example, substantially the same as the outer diameter of the E-shaped retaining ring 101. Alternatively, the distance W2 may be about 0.2 mm smaller than the outer diameter of the E-shaped snap ring 101, or 0.2 mm larger than the outer diameter of the E-shaped snap ring 101 It is also good. In FIG. 7, the E-shaped retaining ring insertion tool 100 is in a state where it can be further pushed in the direction of the arrow P1. However, the user does not have to press the E-shaped retaining ring insertion tool 100 until the distance W4 becomes the distance W2. The user can remove the E-shaped retaining ring insertion tool 100 from the E-shaped retaining ring by the tip portion 33 having the distance W4.

  With such a configuration, after inserting the E-shaped retaining ring 101, the user can easily press the E-shaped retaining ring insertion tool 100 by pressing the holding member 40 so as to further press the E-shaped retaining ring against the shaft. It is possible to remove. According to the above configuration, this embodiment can stably perform a series of operations for inserting the E-shaped snap ring, and provides an E-shaped snap ring insertion tool that reduces the load on the user who uses the insertion tool. can do.

  Thus, the E-shaped snap ring insertion tool 100 according to the present embodiment is similar in appearance to the E-shaped snap ring insertion tool described in Patent Document 1 in its configuration. In the E-shaped snap ring insertion tool described in Patent Document 1, in the same manner as the E-shaped snap ring insertion tool widely used conventionally, the clamping piece for clamping the E-shaped snap ring is integrated with the grip portion In other words, a slide plate is additionally provided to the conventional E-shaped retaining ring insertion tool. On the other hand, the E-shaped retaining ring insertion tool 100 according to the present embodiment is provided with the clamping piece 30 for clamping the E-shaped retaining ring as a separate member from the gripping portion 20. The wheel insertion tool was conceived based on a completely different idea. With such a novel configuration, by utilizing the reaction force from the shaft applied to the E-shaped retaining ring itself, the tip portion 33 of the holding piece 30 is expanded, and the function of facilitating the removal of the E-shaped retaining ring insertion tool 100 is produced. It is As a result, the above-mentioned conventional E-shaped retaining ring insertion tool produces a unique effect that is not exhibited, and is not easily conceived by those skilled in the art.

Second Embodiment
Subsequently, Embodiment 2 will be described with reference to FIGS. 8 to 13. The E-shaped retaining ring insertion tool 200 is a pliers-type E-shaped retaining ring insertion tool. The following description will be given while appropriately omitting the points in common with the first embodiment. FIG. 8 is an external view of an E-shaped retaining ring insertion tool 200 according to the second embodiment. FIG. 8A is a front view of an E-shaped retaining ring insertion tool 200 according to a second embodiment. FIG. 8B is a side view of the E-shaped retaining ring insertion tool 200 according to the second embodiment. The E-shaped snap ring insertion tool 200 includes a first grip member 210, a second grip member 220, a spring 202, a snap ring insertion portion set 270, and a receiving piece 280.

  In FIG. 8A, xyz coordinates are shown. The x-axis plus direction is the rightward direction of the paper surface. The y-axis plus direction is the upper direction of the paper surface. The z-axis plus direction is the near side direction perpendicular to the paper surface. As a matter of course, the right-handed xyz coordinates shown in FIGS. 8 to 13 are convenient for describing the positional relationship of components.

  The first gripping member 210 has a first handle 211 at one end and a first locking portion 213 at the other end. Further, a screw 214 is screwed into the first locking portion 213 of the first gripping member 210. The screw 214 is engaged with the hole 281 of the receiving piece 280 and then engaged with the first holding member 210 to lock the receiving piece 280.

  The first gripping member 210 bends at a substantially right angle at the intermediate portion as it goes from the first handle 211 toward the first locking portion 213, and further, the longitudinal direction of the first handle 211 and the first locking portion 213 It is bent again so as to be substantially parallel to the longitudinal direction of.

  The second holding member 220 has a second handle 221 at one end and a second locking portion 223 at the other end. Further, a screw 224 is screwed into the locking portion of the second holding member 220. The screw 224 is inserted into the hole 271 of the retaining ring insertion portion set 270 and engaged with the second holding member 220 to lock the retaining ring insertion portion set 270.

  The second gripping member 220 bends at a substantially right angle at the intermediate portion as it goes from the second handle 221 toward the second locking portion 223, and further, the longitudinal direction of the second handle 221 and the second locking portion 223 It is bent again so as to be substantially parallel to the longitudinal direction of.

  The first gripping member 210 and the second gripping member 220 have substantially similar shapes as described above. The first holding member 210 and the second holding member 220 are pivotally supported in a direction opposite to each other at the fulcrums 201 in the respective intermediate portions.

  The second gripping member 220 has a stopper 222 in the vicinity of the fulcrum 201. The stopper 222 has a convex shape protruding from the main surface of the second holding member 220. The stopper 222 regulates the opening angle of the first gripping member 210 and the second gripping member 220. Further, the first gripping member 210 and the second gripping member 220 are biased by the spring 202 in a direction away from each other. The spring 202 is a compression coil spring. One end of both ends of the spring 202 is engaged with the first holding member 210 in the vicinity of the fulcrum 201. The other end of the both ends of the spring 202 is engaged with the second holding member 220 in the vicinity of the fulcrum 201.

  The relative position of the first gripping member 210 and the second gripping member 220 is held at a position where the side surface of the first gripping member 210 abuts against the stopper 222. That is, the stopper 222 can maintain the opening angle easy for the user to operate. Also, with such a configuration, it is possible to suppress excessive opening of the E-shaped retaining ring insertion tool 200 and 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 metal plate. In addition, the metal plate may be subjected to a nitriding process, a carburizing process, or the like after being pressed or cut, to increase the surface hardness and to increase the rigidity. The first grip 211 and the second grip 221 are grips when the user grips the E-shaped snap ring insertion tool 100, and the surface of the first gripping member 210 and the second gripping member 220 is made of elastomer or synthetic rubber. And so on.

  The receiving piece 280 can be removed by loosening the screw 214 screwed in the first locking portion 213, and can be replaced with one corresponding to the E-shaped snap ring of a desired size. Similarly, the retaining ring insert 270 can be removed by loosening the screw 224 which is screwed in the second locking part 223 and can be replaced by one corresponding to the desired size of the E-shaped retaining ring is there. As a result, it is possible to fix the retaining ring insertion portion set 270 or the receiving piece 280 corresponding to a plurality of different sized E-shaped retaining rings with respect to one gripping member.

  Next, the details of the retaining ring insertion portion set 270 will be described with reference to FIG. FIG. 9 is an external view of a retaining ring insertion portion set 270 in the E-shaped retaining ring insertion tool 200 according to the second embodiment. FIG. 9A is a front view of the retaining ring insertion portion set 270. 9B is a side view of the retaining ring insertion portion set 270. As shown in FIG.

  The retaining ring insertion portion set 270 has the same function as the push-open mechanism described in the first embodiment. The retaining ring insertion portion set 270 mainly includes a holding piece 230, a holding member 240, and a slide shaft 260.

  Similar to the clamping piece 30 in the E-shaped snap ring insertion tool 100 according to the first embodiment, the clamping piece 230 bifurcates the tip of the flat plate and clamps the E-shaped snap ring on the branched tip portions 233 respectively. A groove 232 is provided for this purpose. The thickness of the pinching piece 230 is the thickness B2, as with the pinching piece 30 in the E-shaped snap ring insertion tool 100 according to the first embodiment.

  The holding member 240 slidably engages the first position at which the distance between the pair of tips is made relatively close and the second position at which the distance between the pair of tips is relatively separated. . The shape of the holding piece 230 is formed to be at the first position when not receiving an external force. Therefore, as in the case of the clamping piece 30 described in the first embodiment, the clamping piece 230 is positioned at the first position when the E-shaped retaining ring is not clamped. For example, when the clamping piece 230 receives an external force and is positioned at the second position, an elastic force to restore the clamping piece 230 to the first position acts.

  The slide shaft 260 passes through the slide hole 245 of the holding member 240 and is locked to the holding piece 230. The engaging portion 261 of the slide shaft 260 is engaged with the slide hole 245 so as to slide in a preset direction. That is, the sandwiching piece 230 has a pair of engaging portions 261 for respectively engaging the pair of tip portions 233 with the holding member 240, and the pair of engaging portions 261 are connected via the U-shaped intermediate portion 237 ing.

  With such a configuration, the retaining ring insertion portion set 270 has the same function as the holding piece 30, the holding member 40, and the slide shaft 60 described in the first embodiment. Therefore, the detailed description of the configuration described above is omitted.

  The holding member 240 also has a hole 271. The hole 271 is a hole for locking the retaining ring insertion portion set 270 to the second locking portion 223 of the second holding member 220. The hole 271 is composed of a large diameter portion and a small diameter portion, and the large diameter portion is larger than the screw head of the screw 224 screwed in the second locking portion 223. The small diameter portion is smaller than the screw head of the screw 224.

  When locking the retaining ring insertion portion set 270 to the second holding member 220, first, the large diameter portion of the hole 271 and the screw 224 which has been loosened to a predetermined position are loosely fitted. Subsequently, the retaining ring insertion portion set 270 is slid to engage the small diameter portion with the screw portion of the screw 214. When the small diameter portion and the screw portion of the screw 214 are engaged, the retaining ring insertion portion set 270 is fitted to the first locking portion 213. After that, by tightening the screw 224, the retaining ring insertion portion set 270 is locked to the second locking portion 223. The second locking portion 223 has a recess that matches the outer shape of the retaining ring insertion portion set 270 with a predetermined clearance. Therefore, after the retaining ring insertion portion set 270 is locked to the second locking portion 223, the shift hardly occurs.

  Next, the receiving piece 280 will be described with reference to FIG. The receiving piece 280 is a receiving member that abuts on 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. 10 is an external view of the receiving piece 280 in the E-shaped retaining ring insertion tool 200 according to the second embodiment.

  The receiving piece 280 is a flat member and has a hole 281 and a receiving portion 282. The hole 281 is a hole for locking the receiving piece 280 to the first locking portion 213 of the first gripping member 210. The shape of the hole 281 and the function thereof are the same as the hole 271 of the retaining ring insertion portion set 270. Therefore, the description is omitted here. The receiving portion 282 is a portion that comes in contact with the shaft when the E-shaped snap ring insertion tool 200 inserts the E-shaped snap ring into the shaft.

  When the receiving piece 280 and the retaining ring insertion part set 270 are respectively attached to the E-shaped retaining ring insertion tool 200, the receiving piece 280 does not exceed the thickness of the retaining ring insertion part set 270 in the z-axis direction Is preferred. By doing this, the degree of freedom in using the E-shaped snap ring insertion tool 200 on the shaft to be worked in the thickness direction is improved, and the workability is enhanced.

  Further, one main surface side of the sandwiching piece 230 is in contact with the holding member. On the other hand, the other main surface side of the sandwiching piece 230 does not have a convex portion. With such a configuration, the degree of freedom in using the E-shaped snap ring insertion tool 200 is improved.

  Next, the operation of the E-shaped retaining ring insertion tool 200 will be described with reference to FIGS. 11 to 13. The mechanism having the retaining ring insertion portion set 270 and the receiving piece 280 described here as main components is referred to as a grip open mechanism.

  FIG. 11 is a diagram for explaining a state in which the E-shaped retaining ring is inserted by the E-shaped retaining ring insertion tool 200 according to the second embodiment. The operation principle of the retaining ring insertion portion set 270 is the same as the contents of the E-shaped retaining ring insertion tool 100 according to the first embodiment described with reference to FIGS. 5 to 7. However, matters related to the receiving piece 280 are different from those in the first embodiment.

  When inserting the E-shaped retaining ring 101 using the E-shaped retaining ring insertion tool 200, the user first mounts the E-shaped retaining ring 101 on the clamping piece 230 of the retaining ring insertion portion set 270. Then, as shown in FIG. 11, the user holds the E-shaped retaining ring 101 in the retaining ring insertion portion set 270, and holds the E-shaped retaining ring 101 held in the retaining ring insertion portion set 270, and the receiving piece 280 And pinch the shaft 102. Furthermore, the user holds the first handle 211 and the second handle 221 so as to bring the retaining ring insertion portion set 270 and the receiving piece 280 close to each other. By doing this, the E-shaped retaining ring 101 is inserted into the shaft 102 from the radial direction. At this time, the distance between the pair of tip end portions 233 of the sandwiching piece 230 is the distance W3.

  Next, the operation after the E-shaped retaining ring 101 is inserted into the shaft 102 will be described with reference to FIG. FIG. 12 is a view for explaining the position of the clamping piece 230 in the E-shaped snap ring insertion tool 200 according to the second embodiment.

  The user further presses the holding member 240 integrated with the second holding member 220 in the direction of the arrow P1 by gripping the first handle 211 and the second handle 221 from the state described in FIG. . That is, the holding member 240 is pressed so as to further press the E-shaped snap ring 101 against the shaft 102 from the state where the E-shaped snap ring 101 is inserted. Then, the clamping piece 230 receives a reaction force from the E-shaped retaining ring 101 in the direction of the arrow R1 which is the opposite direction to the arrow P1.

  In response to the reaction force received in the direction of arrow R1, the engagement portion 261 receives forces in the direction of arrow R2 (x-axis minus direction) and the direction of arrow R3 (x-axis plus direction). That is, when the clamping piece 230 receives a force in the direction of R 1 from the E-shaped retaining ring 101, the engaging portion 261 integrated with the clamping piece 230 contacts the slide hole 245 of the holding member 240. By contacting the slopes of the slide holes 245, the engaging portions 261 receive forces in the directions of the arrows R2 and R3 from the direction of the arrows R1. As a result, the sandwiching piece 230 slides along the slide hole 245 from the first position to the second position.

  In FIG. 12, the distance between the pair of tip end portions 233 of the sandwiching piece 230 is a distance W4. The interval W4 is wider than the above-mentioned interval W3 and is equal to or less than the interval W2. Further, the distance W4 is, for example, substantially the same as the outer diameter of the E-shaped retaining ring 101. Alternatively, the distance W2 may be about 0.2 mm smaller than the outer diameter of the E-shaped snap ring 101, or 0.2 mm larger than the outer diameter of the E-shaped snap ring 101 It is also good. In FIG. 12, the E-shaped retaining ring insertion tool 100 is in a state where it can be further pushed in the direction of the arrow P1. However, the user does not have to press the E-shaped retaining ring insertion tool 100 until the distance W4 becomes the distance W2. The user can remove the E-shaped snap ring insertion tool 200 from the E-shaped snap ring 101 by setting the tip portion 233 to the distance W4.

  Next, the operation of removing the E-shaped retaining ring insertion tool 200 from the E-shaped retaining ring 101 will be described with reference to FIG. FIG. 13 is a cross-sectional view for explaining the movement at the time of removing the E-shaped retaining ring insertion tool according to the second embodiment from the E-shaped retaining ring. FIG. 13 shows a cross section taken along line II of FIG.

  In FIG. 13, the E-shaped retaining ring 101 is inserted into the shaft 102. The user holds the grip portion of the E-shaped snap ring insertion tool 200, the snap ring insertion portion set 270 is pressed in the direction of arrow P1, and the receiving piece 280 is pressed in the direction of arrow P2. There is. Further, the pair of tip end portions 233 is an interval W4. In this state, the receiving portion 282 of the receiving piece 280 is in contact with the shaft 102. The receiving portion 282 is formed in a curved surface so as to make point contact with the axis 102 in the yz plane shown in FIG.

  From this state, the user operates the E-shaped retaining ring insertion tool 200 in the direction of the arrow S1 or the arrow S2 with the receiving portion 282 as a fulcrum. Such a movement causes the groove 232 of the E-shaped retaining ring insertion tool 200 to disengage from the E-shaped retaining ring 101.

  In FIG. 13, a surface that coincides with one of the two main surfaces of the sandwiching piece 230 is shown as a surface K1. Moreover, the surface which corresponds with the other main surface among two main surfaces which the clamping piece 230 has is shown as surface K2. The range in which the receiving piece 280 receives the shaft 102 coincides with at least one of the surfaces K1 and K2 that is the surface coinciding with the two main surfaces of the sandwiching member 230 in the axial direction of the shaft 102 It is set so that there is no straddling of the face to be

  Further, the depth of the groove portion 232 is set such that the E-shaped retaining ring insertion tool 200 is disengaged from the E-shaped retaining ring 101. The groove 232 shown in FIG. 13 corresponds to a position far from the tip. Therefore, the groove shown in FIG. 13 has a depth D2. The depth of the groove portion 232 is shallower as it gets farther from the tip. Therefore, the E-shaped retaining ring insertion tool 200 easily disengages from the E-shaped retaining ring 101.

  In this manner, after inserting the E-shaped retaining ring 101, the user further widens the distance between the pair of tip portions 233 by pressing the holding member 240 in the direction of pressing the E-shaped retaining ring 101 against the shaft. Then, the E-shaped snap ring insertion tool 200 is rotated in the direction of the arrow S1 or the arrow S2 while the distance between the pair of tip end portions 233 is expanded. In this way, the user can easily remove the E-shaped retaining ring insertion tool 100 from the E-shaped retaining ring. According to the above configuration, this embodiment can stably perform a series of operations for inserting the E-shaped snap ring, and provides an E-shaped snap ring insertion tool that reduces the load on the user who uses the insertion tool. can do.

Embodiment 3
Subsequently, Embodiment 3 will be described with reference to FIGS. 14 to 18. The E-shaped retaining ring insertion tool 300 is a pliers-type E-shaped retaining ring insertion tool. The E-shaped retaining ring insertion tool 300 according to the third embodiment has a grip open mechanism as in the E-shaped retaining ring insertion tool 200 according to the second embodiment. However, the E-shaped snap ring insertion tool 300 according to the third embodiment differs from the E-shaped snap ring insertion tool 200 according to the second embodiment in the shapes of the snap ring insertion portion set and the receiving piece. More specifically, the E-shaped retaining ring insertion tool 200 according to the second embodiment supports the main surface of the clamping piece for clamping the E-shaped retaining ring, and the fulcrum for supporting the first gripping member 210 and the second gripping member 220 It is perpendicular to 201. On the other hand, the main surface of the clamping piece for clamping the E-shaped retaining ring by the E-shaped retaining ring insertion tool 300 according to the third embodiment and the fulcrum 201 for supporting the first gripping member 210 and the second gripping member 220 are parallel. It is. The configurations of the first gripping member 210 and the second gripping member 220 are the same for the E-shaped snap ring insertion tool 200 and the E-shaped snap ring insertion tool 300. Therefore, hereinafter, description will be made while appropriately omitting in common with the second embodiment.

  FIG. 14 is an external view of an E-shaped retaining ring insertion tool 300 according to the third embodiment. FIG. 14A is a front view of an E-shaped retaining ring insertion tool 300 according to a third embodiment. FIG. 14 (b) is a side view of the E-shaped retaining ring insertion tool 300 according to the third embodiment. The E-shaped snap ring insertion tool 300 includes a first grip member 210, a second grip member 220, a spring 202, a snap ring insertion portion set 370, and a receiving piece 380.

  Note that xyz coordinates are shown in FIG. The x-axis plus direction is the rightward direction of the paper surface. The y-axis plus direction is the upper direction of the paper surface. The z-axis plus direction is the near side direction perpendicular to the paper surface. As a matter of course, the right-handed xyz coordinates shown in FIGS. 14 to 18 are convenient for describing the positional relationship of the components.

  The first gripping member 210 has a first handle 211 at one end and a first locking portion 213 at the other end. Further, a screw 214 is screwed into the first locking portion 213 of the first gripping member 210. The screw 214 is engaged with the hole 381 of the receiving piece 380 and then engaged with the first holding member 210 to lock the receiving piece 380.

  The second holding member 220 has a second handle 221 at one end and a second locking portion 223 at the other end. Further, a screw 224 is screwed into the locking portion of the second holding member 220. The screw 224 is inserted into the hole 271 of the retaining ring insertion portion set 370 and screwed to the second holding member 220 to lock the retaining ring insertion portion set 370.

  The receiving piece 380 can be removed by loosening the screw 214 screwed in the first locking portion 213, and can be replaced with one corresponding to the E-shaped retaining ring of a desired size. Similarly, the retaining ring insert 370 can be removed by loosening the screw 224 which is screwed in the second locking part 223 and can be replaced by one corresponding to the desired size of the E-shaped retaining ring is there. As a result, it is possible to fix the retaining ring insertion portion set 370 or the receiving piece 380 corresponding to a plurality of different sized E-shaped retaining rings with respect to one gripping member.

  Next, the details of the retaining ring insertion portion set 370 will be described with reference to FIG. FIG. 15 is an external view of a retaining ring insertion portion set 370 in the E-shaped retaining ring insertion tool 300 according to the third embodiment. FIG. 15A is a front view of the retaining ring insertion portion set 370. FIG. 15 (b) is a side view of the retaining ring insertion portion set 370. FIG. 15 (c) is a front view of the retaining ring insertion portion set 370.

  The retaining ring insertion portion set 370 has the same function as the push open mechanism described in the first and second embodiments. The retaining ring insertion portion set 370 mainly includes a holding piece 330, a holding member 340, and a slide shaft 360.

  Similar to the clamping piece 30 in the E-shaped snap ring insertion tool 100 according to the first embodiment, the clamping piece 330 has the flat plate tip bifurcated and the E-shaped snap ring is clamped between the bifurcated tip portions 333 respectively. A groove 332 is provided for this purpose. The thickness of the sandwiching piece 330 is the thickness B2 as in the sandwiching piece 30 in the E-shaped snap ring insertion tool 100 according to the first embodiment.

  In addition, one main surface side of the sandwiching piece 330 is in contact with the holding member. On the other hand, the other main surface side of the sandwiching piece 330 does not have a convex portion. With such a configuration, the degree of freedom in using the E-shaped snap ring insertion tool 300 is improved.

  The holding member 340 can slide the clamping piece 330 between a first position where the distance between the pair of tips is relatively close and a second position where the distance between the pair of tips is relatively apart. Engage. As in the case of the clamping piece 30 described in the first embodiment, the clamping piece 330 is positioned at the first position when the E-shaped snap ring is not clamped.

  The slide shaft 360 is inserted through a slide hole 345 of the holding member 340 and locked to the holding piece 330. The engaging portion 361 of the slide shaft 360 is engaged with the slide hole 345 so as to slide in a preset direction. That is, the sandwiching piece 330 has a pair of engaging portions 361 for respectively engaging the pair of tip portions 333 with the holding member 340, and the pair of engaging portions 361 are connected via the U-shaped intermediate portion 337 ing.

  With such a configuration, the retaining ring insertion portion set 370 has the same function as the holding piece 30, the holding member 40, and the slide shaft 60 described in the first embodiment. Therefore, the detailed description of the configuration described above is omitted.

  The holding member 340 also has a hole 371. The hole 371 is a hole for locking the retaining ring insertion portion set 370 to the second locking portion 223 of the second holding member 220.

  Next, the receiving piece 380 will be described with reference to FIG. The receiving piece 380 is a receiving member that abuts on 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 300. FIG. 16 is an external view of the receiving piece 380 in the E-shaped retaining ring insertion tool 300 according to the third embodiment.

  The receiving piece 380 is a flat member and has a hole 381 and a receiving portion 382. The hole 381 is a hole for locking the receiving piece 380 to the first locking portion 213 of the first holding member 210. The receiving portion 382 is a portion that comes in contact with the shaft when the E-shaped snap ring insertion tool 300 inserts the E-shaped snap ring into the shaft.

  Next, the operation of the E-shaped retaining ring insertion tool 300 will be described with reference to FIG. FIG. 17 is a diagram for describing a state in which the E-shaped retaining ring is inserted by the E-shaped retaining ring insertion tool 300 according to the third embodiment. FIG. 17A shows a state in which the E-shaped retaining ring 101 is inserted by the E-shaped retaining ring insertion tool 300. FIG. 17 (b) shows a state in which the retaining ring insertion portion set 370 is further pressed in the direction of the arrow P1 from the state in which the E-shaped retaining ring 101 is inserted.

  When inserting the E-shaped retaining ring 101 using the E-shaped retaining ring insertion tool 300, the user first mounts the E-shaped retaining ring 101 on the clamping piece 330 of the retaining ring insertion portion set 370. Then, as shown in FIG. 17A, the user holds the E-shaped retaining ring 101 while holding the E-shaped retaining ring 101 in the retaining ring inserting portion set 370, and receives the E-shaped retaining ring 101 held in the retaining ring insertion portion set 370; The shaft 102 is sandwiched with the piece 380. Furthermore, the user holds the first handle 211 and the second handle 221 so as to bring the retaining ring insertion portion set 370 and the receiving piece 380 close to each other. By doing this, the E-shaped retaining ring 101 is inserted into the shaft 102 from the radial direction. At this time, the distance between the pair of tip portions 333 of the holding piece 330 is a distance W3.

  Next, the operation after the E-shaped retaining ring 101 is inserted into the shaft 102 will be described with reference to FIG. The user further presses the holding member 340 integrated with the second holding member 220 in the direction of the arrow P1 by gripping the first handle 211 and the second handle 221 from the state shown in FIG. 17A. ing. That is, the holding member 340 is pressed so as to further press the E-shaped snap ring 101 against the shaft 102 from the state where the E-shaped snap ring 101 is inserted. Then, the clamping piece 330 receives a reaction force from the E-shaped retaining ring 101 in the direction of the arrow R1, which is the opposite direction to the arrow P1.

  In response to the reaction force received in the direction of arrow R1, the engaging portion 361 receives forces in the direction of arrow R2 (z-axis plus direction) and in the direction of arrow R3 (z-axis minus direction). That is, when the clamping piece 330 receives a force in the direction of R 1 from the E-shaped retaining ring 101, the engaging portion 361 integrated with the clamping piece 330 contacts the slide hole 345 of the holding member 340. By contacting the slope of the slide hole 345, the engaging portion 361 receives force in the direction of the arrow R1 and in the direction of the arrow R3. As a result, the sandwiching piece 330 slides along the slide hole 345 from the first position to the second position.

  In FIG. 17B, the distance between the pair of tip end portions 333 of the sandwiching piece 330 is a distance W4. The user can remove the E-shaped retaining ring insertion tool 300 from the E-shaped retaining ring 101 by the tip portion 233 having the distance W4.

  Next, with reference to FIG. 18, an operation of removing the E-shaped retaining ring insertion tool 300 from the E-shaped retaining ring 101 will be described. FIG. 18 is a cross-sectional view for explaining the movement at the time of removing the E-shaped retaining ring insertion tool according to the third embodiment from the E-shaped retaining ring. FIG. 18 shows a cross section taken along line III of FIG. 17 (b).

  In FIG. 18, the E-shaped retaining ring 101 is inserted into the shaft 102. The user holds the grip of the E-shaped snap ring insertion tool 300, the snap ring insertion portion set 370 is pressed in the direction of arrow P1, and the receiving piece 380 is pressed in the direction of arrow P2 There is. Further, the pair of tip end portions 333 is an interval W4. In this state, the receiving portion 382 of the receiving piece 380 is in contact with the shaft 102. The receiving portion 382 is formed in a curved surface so as to make point contact with the axis 102 in the xy plane shown in FIG.

  From this state, the user operates the E-shaped retaining ring insertion tool 300 in the direction of the arrow S1 or the arrow S2 with the receiving portion 382 as a fulcrum. Such a movement causes the groove 332 of the E-shaped retaining ring insertion tool 300 to disengage from the E-shaped retaining ring 101.

  In FIG. 18, a surface that coincides with one of the two main surfaces of the sandwiching piece 330 is shown as a surface K1. Moreover, the surface which corresponds with the other main surface among two main surfaces which the clamping piece 330 has is shown as surface K2. The range in which the receiving piece 380 receives the shaft 102 coincides with at least one of the surfaces K1 and K2 which is the surface coinciding with the two main surfaces of the sandwiching member 330 in the axial direction of the shaft 102 It is set so that there is no straddling of the face to be

  Further, the depth of the groove portion 332 is set such that the E-shaped retaining ring insertion tool 300 is disengaged from the E-shaped retaining ring 101. The groove 332 shown in FIG. 18 corresponds to a position far from the tip. Therefore, the groove shown in FIG. 18 has a depth D2. The depth of the groove 332 is shallower as it gets farther from the tip. Therefore, the E-shaped retaining ring insertion tool 300 is easily disengaged from the E-shaped retaining ring 101.

  In this manner, after inserting the E-shaped retaining ring 101, the user further widens the distance between the pair of tip portions 333 by pressing the holding member 340 in a direction to further press the E-shaped retaining ring 101 against the shaft. Then, the E-shaped snap ring insertion tool 300 is rotated in the direction of the arrow S1 or the arrow S2 while the distance between the pair of tip end portions 333 is expanded. In this way, the user can easily remove the E-shaped retaining ring insertion tool 100 from the E-shaped retaining ring. According to the above configuration, this embodiment can stably perform a series of operations for inserting the E-shaped snap ring, and provides an E-shaped snap ring insertion tool that reduces the load on the user who uses the insertion tool. can do.

  The push-open mechanism supports the shaft so that when the user inserts the E-shaped snap ring using the E-shaped snap ring insertion tool 100, the shaft does not move by the force for inserting the E-shaped snap ring. Separate support means were needed. On the other hand, in the grip opening mechanism, the component receiving piece supports the shaft. Therefore, the user can use the E-shaped retaining ring insertion tool 200 or the E-shaped retaining ring insertion tool 300 without the support means.

  The present invention is not limited to the above embodiment, and can be appropriately modified without departing from the scope of the present invention.

Reference Signs List 20 grip portion 21 screw hole 30, 230, 330 sandwiching piece 32, 232, 332 groove 33, 233, 333 tip 37, 237, 337 intermediate 40, 240, 340 holding member 42 stopper 45, 245, 345 slide Hole 46 Guide hole 50 Screw 60, 260, 360 Slide shaft 61, 261, 361 Engagement portion 62 Flange portion 63 Guide shaft 64 Engagement portion 65 Flange portion 70 Screw 100, 200, 300 E shaped snap ring insertion tool 101 E type Retaining ring 102 Shaft 170, 270, 370 Retaining ring insertion part set 201 Support point 202 Spring 210 1st grip member 211 1st handle 221 2nd handle 213 1st locking portion 223 2nd locking portion 214, 224 Screw 220 2nd Holding member 222 stopper 280, 380 receiving piece 282, 382 receiving portion

Claims (11)

A pinching piece in which the tip of the flat plate is bifurcated and a groove for pinching the E-shaped snap ring is provided on each of the bifurcated pair of tips;
A holding member slidably engaged with a first position where the distance between the pair of tips is made relatively close and a second position where the distance between the pair of tips is relatively separated And
An E-shaped snap ring insertion tool for inserting the E-shaped snap ring in a radial direction with respect to an axis to be worked,
The clamping piece slides from the first position to the second position by pressing the holding member so as to further press the E-shaped retaining ring against the shaft from the state where the E-shaped retaining ring is inserted. Retaining ring insertion tool. The clamping piece is positioned at the first position when not clamping the E-shaped snap ring,
The E-shaped retaining ring insertion tool according to claim 1. The sandwiching piece has a pair of engaging portions for respectively engaging the pair of tips with the holding member, and the pair of engaging portions are connected via a U-shaped intermediate portion.
The E-shaped retaining ring insertion tool according to claim 1 or 2. The engagement portion is a shaft-like member protruding from the main surface of the holding piece,
The holding member has a pair of slide holes for respectively guiding the pair of engaging portions,
The holding portion slides between the first position and the second position when the engagement portion moves in the slide hole.
The E-shaped retaining ring insertion tool according to claim 3. The grooves respectively provided at the pair of tips are formed in a V-shape or a U-shape, and the ridge line of the outer shape along the surface of the E-shaped snap ring and the ridge line of the outer shape along the back surface , Each hold,
The E-shaped retaining ring insertion tool according to any one of claims 1 to 4. The depth of the groove is shallower as it gets farther from the tip,
The E-shaped retaining ring insertion tool according to claim 5. The holding member extends on the inner diameter side of the E-shaped retaining ring relative to the clamping piece in a state where the gripping piece sandwiches the E-shaped retaining ring.
The E-shaped retaining ring insertion tool according to any one of claims 1 to 6. A first gripping member having a first handle at one end and a first locking portion for locking the holding member at the other end;
The first grip member is pivotally supported at an intermediate portion relative to each other, and a second locking portion for locking the second handle at one end and a receiving piece for receiving the shaft at the other end And a second gripping member having
When inserting the E-shaped retaining ring, the first gripping member and the second gripping member are operated to be close to each other.
The E-shaped retaining ring insertion tool according to any one of claims 1 to 7. The range in which the receiving piece receives the axis is set so as not to straddle a plane which coincides with at least one of the two main faces of the holding piece in the axial direction of the axis. ,
An E-shaped retaining ring insertion tool according to claim 8. The holding member is replaceable to a shape according to the size of the E-shaped retaining ring to be inserted.
The E-shaped retaining ring insertion tool according to claim 8 or 9. One main surface side of the sandwiching piece is in contact with the holding member, and the other main surface side of the sandwiching piece does not have a protrusion.
The E-shaped retaining ring insertion tool according to any one of claims 1 to 10.

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