JP2015113941A - Device and method for applying grease to spline part - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a grease application device capable of efficiently applying grease to a spline part formed at the end part of an output shaft, and a method thereof.SOLUTION: A grease application device 1 includes a transcription member 70 transcribing grease to a spline part at the end part of a shaft, and a grease supply member 80 supplying grease to the inner peripheral surface of the transcription member. The transcription member 70 comprises a plurality of transcription split bodies 70a. Each transcription split body 70a can be expanded/contracted radially in a radial direction with the shaft of the grease application device as a center, is integrated in a state of being positioned most radial inside, and is a cylindrical body inside which the spline part can enter.

Description

  The present invention relates to a grease coating apparatus and a coating method for a spline portion formed at an output shaft end portion or the like.

  Conventionally, grease is applied as a lubricant to a serration portion formed at the shaft end of a rotating shaft that transmits power.

  For example, as described in Patent Document 1 (Japanese Utility Model Publication No. 61-52797), a serration portion formed at the shaft end is inserted into a bag hole formed by a nozzle block and a cylindrical body, Through the annular recess formed between the nozzle block into which the body is inserted and the cylinder, the grease from the plurality of grease flow holes provided in the cylinder is inserted into the bag hole of the cylinder in which the serration portion at the shaft end is inserted. The gap is filled, and excess grease is discharged from the grease drain hole formed in the cylinder.

However, according to the said structure, grease will be apply | coated over the whole region of the serration part formed in the shaft end.
Normally, grease tends to stay at the end of the serration portion, and when it hardens, the friction increases and the smooth rotation of the shaft is impeded. For this reason, it is necessary to remove the grease applied to the end portion of the serration portion, resulting in a problem that man-hours are increased. Also, since the grease is pumped by the pump and supplied into the gap, there is a problem that the grease leaks to the shaft end face and the shaft base end side, and this leaked grease must be removed for the same reason. The man-hour was large.

  In order to solve this problem, for example, in Patent Document 2 (Japanese Patent Laid-Open No. 3-109964), there is a female spline portion that is fitted to a male spline portion formed on a workpiece while maintaining a predetermined interval. A slit-like grease passage that cuts the female spline portion in the radial direction in the grease application jig using a grease application device that is provided with a grease application jig that is movable relative to the workpiece in the axial direction. And an annular grease spool is formed at the peripheral portion of the grease passage, and the grease spool is connected to the female spline portion through the throttle portion and communicated with the grease supply passage from the grease pressure supply source. It is disclosed.

  Patent Document 3 (Japanese Patent Application Laid-Open No. 2002-227867) discloses a cap that is inserted and fitted to the inner and outer peripheral sides of the shaft end portion when grease is applied to the spline portion formed on the inner periphery of the hollow shaft end portion. The structure which apply | coats grease to a spline part using is disclosed.

  The cap is an outer cylinder part fitted to the outer peripheral side of the shaft end part, and an inner cylinder located inside the outer cylinder part and fitted to the inner peripheral side of the spline and protruding in the cap insertion direction with respect to the outer cylinder part And a connecting portion that connects these inner and outer cylindrical portions on the front side in the cap insertion direction, and after applying grease to the outer peripheral surface of the protruding portion of the inner cylindrical portion of this cap, the outer peripheral surface of the protruding portion is inserted by inserting the cap. The grease applied to the spline adheres to the spline.

Japanese Utility Model Publication No. 61-52797 JP-A-3-1009644 JP 2002-227867 A

  With the configuration disclosed in Patent Document 2, the grease supplied under pressure through the grease supply passage enters the grease spool in a state where the pressure is appropriately reduced by the throttle portion, and then from the slit-like grease passage. Since the thin film is supplied to the workpiece spline part, it can be applied uniformly to the workpiece spline part by supplying the grease while moving the coating jig in the axial direction of the workpiece. .

  However, in the configuration disclosed in Patent Document 2, since the structure of the grease supply path is complicated, the manufacturing cost is increased, and the structure of the grease supply path is complicated, so that the grease is cured at the throttle portion and the grease spool. As a result, the proper amount of grease cannot be supplied to the spline portion via the grease passage.

  Further, according to the configuration disclosed in Patent Document 3, since the grease is applied to the outer peripheral surface of the protruding portion with a brush or the like, it is difficult to apply a uniform and appropriate amount of grease over the entire circumference, and the spline portion is uniformly applied. There is a problem that can not be applied properly.

  In order to solve the above problems, a grease applying device for a spline part according to the present invention includes a transfer member that transfers grease to the spline part, and a grease supply member that supplies grease to the inner peripheral surface of the transfer member, The transfer member is composed of a plurality of transfer divided bodies, each of the transfer divided bodies can be radially expanded and contracted around the axis of the grease coating device, and each transfer divided body is positioned in the innermost radial direction. An apparatus for applying grease to a spline portion, wherein the device is integrated into a cylindrical body into which the spline portion can enter.

  As the structure of the grease supply member, a discharge hole for discharging grease is formed on the outer peripheral surface toward the inner surface of the closed transfer divided body, and further, the outer peripheral surface is connected to the inner surface of the closed transfer divided body. The thing in which the flange part which forms a fixed clearance gap between them was formed can be considered.

  Further, the method of applying grease to the spline portion according to the present invention using the grease applying apparatus may be configured such that the plurality of transfer divided members constituting the transfer member are radially separated around the axis, and the grease supply member is In this state, each transfer divided body is reduced and moved toward the axis so as to be integrated into a cylindrical body. From the grease supply member located inside the cylindrical body, The grease is discharged onto the inner surface of the cylindrical body, and then the plurality of transfer divided bodies constituting the transfer member are radially spread along the radial direction. Thereafter, the entire grease applying device is separated from the grease supply member. Relative movement to the top of the spline part, the spline part is faced between the radially separated transfer divided bodies, and then the transfer divided bodies are moved toward the axis to be integrated into a cylindrical body. Applied to the inner surface The are grease is configured to transfer to the spline portion.

  According to the grease applying apparatus and the grease applying method according to the present invention, an appropriate amount of grease can be uniformly supplied to the spline portion at the shaft end without leaking out to the shaft end surface or the shaft base end side. .

Front view of grease applying apparatus according to the present invention Top view of the grease applicator The figure corresponding to Drawing 1 in the state where grease is supplied from a grease supply member Plan view of the state of FIG. Exploded perspective view of members centering on the drive unit FIG. 5 is an exploded perspective view from below. AA sectional view of FIG. BB sectional view of FIG. EE view of FIG. The figure corresponding to FIG. 9 of the state which the transfer member expanded. The figure corresponding to FIG. 9 of the state which receives supply of grease from a grease supply member The figure corresponding to FIG. 10 which shows the state which the spline part of the axis | shaft faced between the transcription | transfer members of the state which expanded. The figure which shows the state which apply | coated the grease to the spline part of the main shaft end part of a transmission F direction arrow view of FIG. 7 corresponding to FIG. Plan view of holder part of grease application device G view of FIG. H view of FIG. Plan view of claw actuating member K view of FIG. Top view of claw member M view of FIG. N view of FIG. The figure which shows the state which has apply | coated the grease to the spline part of the main shaft end part of a transmission

Preferred embodiments of the present invention will be described below with reference to the drawings.
In FIG. 1, the grease application device 1 includes a cylindrical gripping portion 2 from above, a cylinder portion 10 connected to the gripping portion 2, a cylindrical holder portion 30 connected to the cylinder portion 10, and a peripheral surface of the holder portion 30. The three claw members 50 are engaged with the engagement grooves 31 formed at three equal positions, and the transfer member 70 is connected to each claw member 50.

  As shown in FIG. 2, the transfer member 70 includes three transfer member divided bodies 70 a, and each transfer member divided body 70 a has a fan shape in a plan view and expands in the radial direction about the axis of the grease coating apparatus 1. The three transfer member divided bodies 70a are integrated into a cylindrical shape at the position shown in FIG.

  A switch 3 for operating the cylinder portion 10 is disposed at the upper end of the grip portion 2. A cylinder chamber 11 is formed in the cylinder portion 10, and a piston 12 is slidably disposed in the cylinder chamber 11 by air supplied and discharged from the air supply holes 13 and 14. A piston rod 15 extends from the piston 12 through the cylinder portion 10.

  The holder 30 includes a hollow cylindrical portion 32, a large diameter portion 34 projecting into three equal positions of the peripheral surface 33 of the hollow cylindrical portion 32, and a bottom surface from the center of the peripheral surface 35 of the large diameter portion 34 toward the hollow cylindrical portion 32. Is constituted by an engaging groove 31 which is drilled so as to be released. As shown in FIG. 16, the engaging groove 31 has a substantially cross shape in a side view.

  As shown in FIGS. 1 and 21, the claw member 50 has a substantially cruciform shape in a side view so that it can be inserted into the engagement groove 31, and is formed at the center of the engagement groove 31. Protrusions 51 formed on both side surfaces of the claw member 50 are engaged with the wide groove 36 and are supported so as to be slidable in the center direction of the holder 30 while preventing the claw member 50 from dropping downward. .

  As shown in FIG. 22, the base end side of the claw member 50 is formed on a downward slope 52 from the upper surface to the lower surface, and an engagement groove 53 is formed in the slope 52 from the upper surface to the lower surface. The back part 54 of the engaging groove 53 is formed wide as shown in FIG.

  Further, as shown in FIGS. 9 and 10, a tapered truncated cone portion 16 is disposed at the tip of the piston rod 15, and as shown in FIGS. 18 and 19, the peripheral surface of the truncated cone portion 16 is provided. An engagement claw 18 is formed at a position of 17 equal to three. The engaging claw 18 has a substantially T shape corresponding to the engaging groove 53 of the claw member 50, and the tip 19 is formed wide.

  When the engagement claw 18 formed on the truncated cone portion 16 at the tip of the piston rod 15 is inserted into the engagement groove 53 formed on the proximal end side of the claw member 50, the tip 19 of the engagement claw 18 is inserted. Is engaged with the inner portion 54 of the engaging groove 53, so that when the piston rod 15 moves up and down, the engaging claw 18 slides up and down without detaching from the engaging groove 53.

  As the engaging claw 18 moves up and down, the claw member 50 expands or contracts in the radial direction, and the transfer member divided body 70a attached to the claw member 50 also expands or contracts in the radial direction. Do.

  A rod 20 is disposed along the axis of the piston rod 15 (the axis of the grease applying device) at the center of the lower surface of the truncated cone portion 16, and a cylindrical locking piece 21 is disposed at the tip of the rod 20. It is installed.

  Further, as described above, the transfer member divided body 70 a constituting the transfer member 70 is disposed on the lower surface of each claw member 50. Each transfer member divided body 70a has a substantially sector shape in a plan view, and is integrated into a cylindrical shape in a state where the opposing side surfaces of the three sector shapes are in contact with each other (a state positioned on the innermost radial direction). A two-stage hollow cylindrical hole is formed inside the cylindrical transfer member 70, a small diameter cylindrical hole 71 and a large diameter cylindrical hole 72. A small-diameter cylindrical hole 71 is formed by connecting the small-diameter circular surfaces on the upper inner side of the sector-shaped transfer member 70, and a large-diameter cylindrical hole 72 is formed by connecting the large-diameter circular surfaces on the lower inner side.

  On the other hand, the outer shape of the grease supply member 80 is formed in a two-stage cylinder having a small diameter cylinder 87 and a large diameter cylinder 88 opposed to the two-stage hollow cylinder hole formed by the three substantially fan-shaped transfer member divided bodies 70a. On the upper ends of the small-diameter cylinder 87 and the large-diameter cylinder 88, flanges 87a and 88a having diameters slightly larger than the diameters of the small-diameter cylinder 87 and the large-diameter cylinder 88 are formed.

  Grease supply holes 82 are equally provided in a plurality of stages on the peripheral surface 81 of the small-diameter cylinder 87 and the large-diameter cylinder 88 constituting the two-stage cylinder, and the base end of each grease transfer hole 82 is established in the axial portion of the cylinder. The grease supply path 83 is communicated. The grease supply path 83 is connected to a grease tank 86 via a grease supply pipe 85 having a pressure feed pump 84 and a regulator 89 in the middle.

  Therefore, between the outer peripheral surface 81 of the two-stage cylindrical small-diameter cylinder 87 and the large-diameter cylinder 88 and the small-diameter cylindrical hole 71 and the large-diameter cylindrical hole 72 of the two-stage hollow cylindrical hole, the flanges 87a and 88a are provided. As a result, voids are formed.

  That is, the grease supply member 80 has a shape corresponding to the end portion R of the main shaft S of the transmission T of this embodiment, and the diameters of the flange portions 87a and 88a are large-diameter splines of the end portion R of the main shaft S. It is formed to have the same diameter as Q1 and the small-diameter spline Q2. Each grease supply hole 82 is opened at a portion corresponding to a two-stage spline formed on the peripheral surface of the end portion R of the main shaft S, that is, a large-diameter spline Q1 and a small-diameter spline Q2. More specifically, each grease supply hole 82a corresponding to the small diameter spline Q2 is opened at a position avoiding the upper peripheral surface of the small diameter spline Q2, and each grease supply hole 82b corresponding to the large diameter spline Q1 is the upper end of the large diameter spline Q1. It is established in a position that avoids the circumference. The grease supply member 80 is arranged in a vertical state with the small-diameter cylinder 87 facing upward.

  When applying grease to the splines Q1 and Q2 formed at the end R of the main shaft S of the transmission T using the grease applying apparatus of the present invention under such a configuration, first, the upper part of the cylinder part 10 is When the air is supplied through the air supply hole 13 and the piston 12 is positioned at the lower end of the cylinder chamber 11, that is, as shown in FIGS. The operator grips the part 2 and moves it onto the grease supply member 80, and then touches the entire bottom surface of the locking piece 21 disposed at the tip of the rod 20 connected to the piston rod 15 against the upper surface of the grease supply member 80. Make contact.

  Then, the operator pushes the switch 3 at the upper end while holding the grip 2. As a result, air is discharged from the air supply hole 13, and air is supplied from the air supply hole 14, whereby the piston 12 moves to the upper end of the cylinder chamber 11. As a result, the piston rod 15 rises, and the truncated cone portion 16 disposed at the tip of the piston rod 15 also rises. Thereby, each claw member 50 slidably engaged with each engagement claw 18 of the truncated cone part 16 via the engagement groove 53 moves in the radial direction from the released state toward the axial direction of the piston rod 15. The transfer member 70 divided bodies 70 a fastened to the lower surface of the claw member 50 also move in the radial direction toward the axial center direction of the piston rod 15.

  That is, the grease supply member 80 moves in the circumferential direction. At this time, the locking piece 21 disposed on the rod 20 extended from the lower surface of the truncated cone part 16 also rises, so that the grease applying device 1 is self-weighted in a state where the gripping part 2 is supported by the operator. To descend.

  3, 9, or 11, the small diameter cylinder 87 and the flange portion 87 a of the grease supply member 80, the flange portion 88 a and the large diameter cylinder 88, and the small diameter cylinder 87 and the flange portion 88 a of the transfer member 70. It becomes a state covered with a two-stage hollow cylindrical hole formed by the small diameter cylindrical hole 71 and the large diameter cylindrical hole 72. Between the outer peripheral surface 81 of the small-diameter cylinder 87 and the large-diameter cylinder 88 constituting the two-stage cylindrical hole, and the two-stage hollow cylindrical hole formed by the small-diameter cylindrical hole 71 and the large-diameter cylindrical hole 72 of the transfer member 70. Voids are formed.

  In this state, the pump 84 is operated, and the grease X is discharged from the grease supply hole 82 through the grease supply line 85 and the grease supply path 83 provided with the regulator 89 from the grease tank 86 at a constant pressure for a certain period of time. The discharged grease X adheres to the inner surfaces of the small-diameter cylindrical hole 71 and the large-diameter cylindrical hole 72 of the transfer member 70 in a plurality of rows at equal intervals. (See Figure 12)

  Next, when the operator pushes the switch 3, air is discharged from the air supply hole 14, and when air is supplied from the air supply hole 13, the piston 12 descends toward the lower end of the cylinder chamber 11. As a result, the grease applying device 1 itself rises with the locking piece 21 as the base end, and at the same time, the truncated cone portion 16 connected to the lower end of the piston rod 15 falls. Thereby, each claw member 50 slidably engaged with each engagement claw 18 of the truncated cone part 16 via the engagement groove 53 moves radially outward about the axis of the piston rod 15, Each transfer member divided body 70 a fastened to the lower surface of the member 50 also moves radially from the axial center direction of the piston rod 15. That is, it moves in a direction away from the peripheral surface of the grease supply member 80.

  Next, the operator grips the grip portion 2 of the grease applying device 1 with the grease X attached to the transfer member 70 and moves it onto the end portion R of the main shaft S of the transmission T, and the end portion of the main shaft S of the transmission T. The entire lower surface of the locking piece 21 of the grease applying device 1 is brought into contact with the end surface of R and the same operation as described above is performed, so that the end portion R of the main shaft S of the transmission T is shown in FIG. 13 or FIG. The grease is adhered to the large-diameter spline Q1 and the small-diameter spline Q2 formed in the above.

  In this state, the operator rotates the grease applying device 1 at least 180 degrees in the horizontal plane about the vertical axis with the locking piece 21 as an axis, thereby attaching to the large-diameter spline Q1 and the small-diameter spline Q2 in a multipoint manner. The grease X thus adhered adheres to the entire circumference of the splines Q1 and Q2 in a strip shape.

  A portion where grease is not attached is generated between the bands of the grease X, but the grease X is moved by the centrifugal force generated by the rotation of the main shaft S and is applied in a flush state. Also at this time, since the grease X does not adhere to the upper peripheral surfaces of the large-diameter spline Q1 and the small-diameter spline Q2, the friction due to the hardening of the grease does not occur, and the shaft rotates smoothly.

  The separation operation from the end R of the main shaft S of the transmission T of the grease application device 1 after the grease application is the same as the separation from the grease supply member 80, and therefore will be omitted.

  As described above, the diameters of the large-diameter cylinder 88 and the small-diameter cylinder 87 of the grease supply member 80 are slightly smaller than the diameters of the large-diameter spline Q1 and the small-diameter spline Q2 formed at the end R of the main shaft S of the transmission T. Therefore, the grease applied to the two-stage hollow cylindrical hole formed by the small-diameter cylindrical hole 71 and the large-diameter cylindrical hole 72 of the transfer member 70 of the grease applying apparatus 1 is reliably supplied to the main shaft S of the transmission T. Are transferred to the surfaces of the large-diameter spline Q1 and the small-diameter spline Q2 formed at the end R of the substrate.

The grease application apparatus according to the present invention is not limited to the spline portion formed at the end portion of the main shaft of the transmission, but can be used when applying grease to the spline portion formed at the end portions of various shafts.

  DESCRIPTION OF SYMBOLS 1 ... Grease application apparatus, 2 ... Holding part, 3 ... Switch, 10 ... Cylinder part, 11 ... Cylinder chamber, 12 ... Piston, 13, 14 ... Air supply hole, 15 ... Piston rod, 16 ... Frustum part, 17 ... Circumferential surface of the truncated cone part, 18 ... engaging claw, 19 ... tip of the engaging claw, 20 ... rod, 21 ... locking piece, 30 ... holder, 31 ... engaging groove, 32 ... hollow cylindrical part, 33 ... hollow The peripheral surface of the cylindrical portion, 34 ... the large diameter portion, 35 ... the peripheral surface of the large diameter portion, 36 ... the wide groove portion, 50 ... the claw member, 51 ... the protruding portion, 52 ... the slope, 53 ... the engagement groove, 54 ... the back portion , 70: Transfer member, 70a: Transfer member divided body, 71: Small diameter cylindrical hole, 72: Large diameter cylindrical hole, 80 ... Grease supply member, 81 ... Peripheral surface of large diameter cylinder, 82 ... Grease supply hole, 83 ... Grease Supply path, 84 ... Pressure pump, 85 ... Grease supply pipe, 87 ... Small diameter cylinder, 88 ... Large diameter cylinder, 87a, 8 8a ... collar, 89 ... regulator, T ... transmission, S ... main shaft, R ... end of main shaft, Q1 ... large diameter spline, Q2 ... small diameter spline.

Claims (3)

  A grease applying device that applies grease to a spline portion formed at a shaft end, the grease applying device including a transfer member that transfers grease to the spline portion, and a grease that supplies grease to an inner peripheral surface of the transfer member. A transfer member, and the transfer member is composed of a plurality of transfer divided bodies, each of the transfer divided bodies is radially expandable / reducible around the axis of the grease applying device, and each transfer divided body is the most radially divided An apparatus for applying grease to a spline portion, wherein the device is integrated in a state where the spline portion is located on the inner side and becomes a cylindrical body into which the spline portion can enter.   The grease application device for the spline part according to claim 1, wherein a discharge hole for discharging grease is formed on the outer peripheral surface of the grease supply member toward the inner surface of the transfer divided body in a closed state. A device for applying grease to a spline portion, characterized in that a flange portion is formed to form a fixed gap with the inner surface of the transfer divided body in a closed state. In the grease application method to the spline part using the grease application device according to claim 1,
In a state where a plurality of transfer division bodies constituting the transfer member are separated radially about an axis, the grease supply member is faced between the transfer division bodies, and in this state, each transfer division body is directed toward the axis. Reduced and integrated into a cylindrical body, and the grease is discharged from the grease supply member located inside the cylindrical body to the inner surface of the cylindrical body, and then a plurality of members constituting the transfer member After that, the entire spreader is moved away from the grease supply member and onto the spline part, and the spline part is exposed between the radially separated transfer parts. Next, the transfer divided bodies are moved relative to each other and integrated into a cylindrical body, and the grease applied to the inner surface of the cylindrical body is transferred to the spline section. Grease coating Method.

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