JP2823263B2 - Spline grease application device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a grease application device for a spline portion.

(Problems to be Solved by the Prior Art and the Invention) When applying grease to a male spline portion formed on the outer periphery of a shaft member or the like, a cylindrical grease application jig as shown in FIG. A method in which a work b having a male spline portion c is inserted into a and a grease is supplied from a grease supply hole d opened in an inner peripheral surface thereof while rotating the grease applying jig a is conventionally used. ing. However,
In the case of such a method, since it is difficult to control the amount of grease supplied from the grease supply hole d, excessive grease is applied to the male spline portion c or the male spline portion c In addition to the problem that it is difficult to apply the grease uniformly, if the grease supplied more than necessary is left in the grease application jig a, the grease is applied to a portion (for example, a shaft portion) where the grease is unnecessary. There is also a problem that they adhere.

Japanese Patent Application Laid-Open No. 63-51972 discloses a method in which grease that has been thinly spread on a rotating disk is rubbed with a transfer body, and then the grease rubbed off the transfer body is applied to a work. Although disclosed, it is difficult for this method to apply grease to the spline portion targeted by the present invention.

The present invention has been made in view of the above points, and an object of the present invention is to enable easy and reliable application of grease to a spline portion.

(Means for Solving the Problems) According to the invention of claim 1, as a means for solving the above problems, a female die fitted with a predetermined spacing to a male spline portion formed on a work is provided. In a grease applying apparatus having a grease applying jig having a spline portion and being relatively movable in the axial direction with respect to the work, the grease applying jig may be configured such that the female spline portion is radially moved to the grease applying jig. A slit-shaped grease passage for cutting is formed, and an annular grease reservoir is formed at a peripheral portion of the grease passage, and the grease reservoir is connected to a grease pressurized supply source via a throttle portion. It is communicated with the passage.

According to a second aspect of the present invention, as a means for solving the above-mentioned problem, in the grease application device of the spline section according to the first aspect, the grease supply amount supplied from the grease pressurized supply source to the grease supply passage is determined. It is adjusted by a valve.

According to a third aspect of the present invention, as a means for solving the above-mentioned problem, in the grease applying apparatus of the spline portion according to the first or second aspect, the moving speed at the time of retreating the grease applying jig can be adjusted. Like that.

According to a fourth aspect of the present invention, as a means for solving the above-mentioned problems, in the grease applying apparatus for a spline section according to any one of the first to third aspects, the grease applying jig is rotated by a predetermined angle. A rotating air cylinder is provided.

(Operation) According to the first aspect of the present invention, the following effects can be obtained by the above means.

That is, the grease supplied under pressure through the grease supply passage enters the grease reservoir in a state where it is appropriately depressurized by the throttle portion, and then forms a thin film from the slit-like grease passage to form a spline portion of the work. , And a uniform amount of grease can be obtained in an appropriate amount (that is, an amount necessary for thin coating on the spline portion).

According to the second aspect of the present invention, the following effects can be obtained by the above means.

That is, the amount of grease applied to the spline portion can be easily determined from the point where grease adjusted to a constant amount is supplied from the grease pressurized supply source via the metering valve to the grease supply passage.

According to the third aspect of the present invention, the following effects can be obtained by the above means.

That is, the amount of grease applied to the spline portion can be easily determined by adjusting the moving speed at the time of retreating the grease applying jig.

According to the fourth aspect of the present invention, the following effects can be obtained by the above means.

That is, when the spline portion of the grease applying jig and the spline portion of the work are mated, the fitting of the two spline portions is performed by rotating the grease applying jig by a predetermined angle by the rotating air cylinder. It will be easily obtained.

(Effect of the Invention) According to the invention of claim 1, there is provided a female spline portion which is fitted to the male spline portion formed on the work at a predetermined interval, and the shaft is formed on the work. In a grease applying apparatus provided with a grease applying jig which is relatively movable in a direction, the grease applying jig is formed with a slit-shaped grease passage for cutting the female spline portion in a radial direction, and An annular grease reservoir is formed at the peripheral edge of the grease passage, and the grease reservoir is made to communicate with the grease supply passage communicating with the grease pressurized supply source through the throttle portion. The grease supplied under pressure is supplied to the spline portion of the work in a thin film form from the slit-shaped grease passage after entering the grease reservoir in a state where the grease is appropriately reduced in pressure by the throttle portion. As a result, an appropriate amount (that is, an amount necessary to be applied thinly to the spline portion) and a uniform supply of grease can be obtained. As a result, an excellent effect that the grease can be applied to the spline portion of the work uniformly and without waste can be obtained. is there.

Further, the grease supplied to the grease passage is decompressed by the throttle unit, then temporarily pooled in the grease reservoir, and then supplied to the spline unit through the slit-shaped grease passage. There is also an effect that the supply amount can be easily controlled.

According to the invention of claim 2, grease adjusted to a constant amount is supplied from the grease pressurized supply source via the fixed amount valve to the grease supply passage, so that the amount of grease applied to the spline portion can be easily adjusted. Thus, the amount of grease applied to the spline portion of the work can be easily controlled.

According to the invention of claim 3, since the moving speed of the grease applying jig at the time of retreat can be adjusted, the amount of grease applied to the spline portion can be easily determined, and the work to the spline portion can be adjusted. There is an effect that the amount of grease applied can be easily controlled.

According to the fourth aspect of the present invention, when a grease application jig is rotated by a predetermined angle, a rotation air cylinder is provided, and when the spline portion of the grease application jig and the spline portion of the work are fitted together. By rotating the grease applying jig by a predetermined angle by the rotating air cylinder, the fitting of the two splines can be easily obtained, so that the effect that the grease applying operation can be performed smoothly can be achieved. is there.

Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings.

As shown in FIGS. 1 and 2, the grease applying apparatus according to the present embodiment is used for applying grease to a male spline portion 2 formed on the outer periphery of a work 1 formed of a shaft member. And a cylindrical grease applying jig having a female spline portion 4 fitted with a predetermined gap to the male spline portion 2 of the work 1 supported on a pallet (not shown) in a centered state. 3 and the grease application jig 3
And a bracket 5 for rotatably supporting the bracket 5
And a lifting table 7 that supports the supporting table 6 so as to be able to move horizontally.

The elevating table 7 can be moved up and down between a grease application position and a retreat position by an elevating drive unit (not shown). Further, on the lift 7, a piston rod 8 a of a horizontally moving air cylinder 8 fixed in a horizontal state to a frame (not shown) of the grease applying device is supported so as to be able to advance and retreat in a horizontal direction. The support 6 is fixed to the tip of the piston rod 8a.
That is, the bracket 5 (in other words, the jig 3 for applying grease) is caused by the expansion and contraction of the air cylinder 8 for horizontal movement.
Can be advanced and retreated.

The grease application jig 3 includes a spline forming body 9 in which the spline portion 4 is formed on the inner peripheral side, and a jig main body 10 into which the spline forming body 9 is inserted and supported. The spline forming body 9 is composed of a pair of front and rear divided pieces 9a and 9b (see FIG. 3), and a slit-shaped grease passage 11 for cutting the female spline portion 4 in a radial direction is provided therebetween. , 11 .. are formed. That is, the divided pieces 9a, 9b constituting the spline forming body 9
On the axial end face of one side (in this embodiment, the front divided piece 9a), four small projections 12, 12,... Extending in the radial direction at 90 ° intervals are formed as shown in FIG. When the two divided pieces 9a and 9b are joined together in the axial direction, slit-shaped grease passages 11, 11,... Are formed therebetween.

The jig body 10 includes a cylindrical portion 10a into which the spline forming body 9 is inserted and fixed, and a shaft portion protruding from a rear end of the cylindrical portion 10a.
The grease application jig 3 is made rotatable by rotatably supporting the shaft portion 10b at the lower end of the bracket 5.

In addition, the jig body 10 includes the grease passages 11, 11,
An annular grease reservoir 13 is formed at a position corresponding to the outer peripheral edge of. The grease reservoir 13 is communicated with a grease supply passage 15 communicating with the grease pressurized supply source 14.On the inlet side, the grease supply pressure of the grease supplied from the grease supply passage 15 is appropriately adjusted. Restrictor that acts to reduce pressure
16 are formed. Reference numeral 17 denotes a cap for detachably fixing the spline forming body 9 to the jig main body 10, reference numeral 18 denotes a bush interposed between the jig main body 10 and a bearing portion of the bracket 5, and reference numeral 19 denotes a seal. The member 20 is the narrowed portion 16
An annular grease spool 21 formed on the inlet side of the valve is a metering valve for regulating the grease supply amount.

In the case of the present embodiment, there are two types of work to be grease-applied (for example, those having different spline tooth depths).
From a certain point, two types of the above-mentioned grease application jigs (that is, grease application jigs 3, 3 ') are prepared. The grease application jigs 3, 3 'differ only in the structure of the spline forming bodies 9, 9', and the other structures are almost the same. That is, the spline forming member 9 'is different from the spline forming member 9 only in that the tooth pattern of the female spline portion 4' is deeper than that of the spline forming member 9, as shown in FIGS. Therefore, each part of the spline forming body 9 ′ is indicated by adding ′ to the reference numeral of each part of the spline forming body 9. The grease application jig 3 ′ is rotatably supported on the bracket 5 in the same manner as the grease application jig 3. At the rear ends of the jig body shafts 10b, 10 '(see FIG. 2) of the two grease applying jigs 3, 3', one ends of links 22, 22 'are fixed so as to rotate together. The other ends of the two links 22 and 22 'are pivotally supported by a tip of a piston rod 23a of a pivoting air cylinder 23 supported downward with respect to the bracket 5. That is, in the case of the present embodiment, the expansion / contraction operation of the rotation air cylinder 23 causes
The grease application jig 3 (and 3 ') is rotated via the links 22 and 22', and the female spline portion of the grease application jig 3 (and 3 ') is rotated by the rotation. 4 (and 4 ') and the male spline portion 2 of the work 1
Is to be fitted. Code 24,24 '
Are long holes for link length adjustment formed on the links 22 and 22 respectively.

Further, the support base 6 is provided with a stepping actuator 25 for positioning the grease applying jig 3 or the grease applying jig 3 ′ at the grease applying station S by swinging the bracket 5. Have been. The changeover actuator 25 includes a rotation drive unit 25a.
And a shaft body 25b rotated by the rotation driving means 25a.
The bracket 5 is attached to the end of the shaft 25b.
By fixing the upper end of the bracket 5, the bracket 5 can be swung in the direction of the arrow M or N in accordance with the forward and reverse rotation of the shaft body 25b. Reference numerals 26 and 27 denote stoppers for restricting the swing limit of the bracket 5, and reference numeral 28 denotes a bearing.

Next, a procedure for applying grease to a spline portion of a work using the illustrated grease applying apparatus will be described.

First, when the work 1 is positioned on a pallet (not shown) in a centered state, the lifting table 7 which has been raised by the lifting driving means (not shown) is lowered by the operation of the lifting driving means. At this time, jig for grease sewing cloth 3, 3 '
Is selected to correspond to the type of the work 1 (the grease application jig 3 in the illustrated case) is positioned at the grease application station S. Under this state, the grease applying jig 3 is advanced together with the support base 6 and the bracket 5 by the contraction operation of the horizontal moving air cylinder 8, and the male spline portion 2 of the work 1 and the grease applying jig 3 are moved. The female spline part 4 is mated to the work 1
Grease application jig 3 at the front end position of male spline portion 2
The grease application jig 3 is moved forward until the slit-shaped grease passages 11, 11,... Are positioned (shown in FIG. 1). When the grease application jig 3 moves forward, the spline portions 2 and 4 cannot always be fitted together at a time, and the teeth of the spline portions 2 and 4 may collide with each other. . At that time, the air cylinder 23 for rotation is expanded and contracted to rotate the jig 3 for applying grease within a small range, so that the two spline portions 2 and 4 are in a state of being fitted with each other. Thus, when the setting of the grease application jig 3 on the work 1 is completed, a fixed amount of grease is discharged from the grease pressurized supply source 14, and the grease supply passage 15, the throttle unit 16, the grease storage unit 13, and the grease passage 11 Through spline
Grease is supplied to 2,4. Then, the grease supplied from the grease supply passage 15 is appropriately depressurized by the throttle unit 16 and then enters the grease storage unit 13, and then becomes a thinner film form of the grease passages 11, 11. 4
And the male spline portion 2 are uniformly supplied to the fitting portion. Therefore, when the air cylinder 8 for horizontal movement is extended and the jig 3 for applying grease is retracted, the grease passage 1
The grease supplied from 1, 11,... Is thinly and uniformly applied to the male spline portion 2 of the work 1. The amount of grease applied at this time is easily determined by controlling the amount of grease supplied at one time and controlling the moving speed of the grease applying jig 3.

The invention of the present application is not limited to the configuration of the above embodiment, and it is needless to say that the design can be changed as appropriate without departing from the gist of the invention.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing a main part of a grease application device for a spline portion according to an embodiment of the present invention, FIG. 2 is a view as viewed from an arrow A in FIG. 1, and FIG. 3 is a grease application device in FIG. Fig. 4 is an exploded cross-sectional view showing a spline forming body of one grease applying jig, Fig. 4 is a view taken in the direction of arrows IV-IV in Fig. 3, and Fig. 5 is another grease applying apparatus in the grease applying apparatus shown in Fig. 1. FIG. 6 is an exploded cross-sectional view showing a spline forming body of the jig of FIG.
FIG. 7 is a cross-sectional view of a conventional grease applying apparatus. 1 Work 2 Male spline 3,3 'Grease application jig 4,4 Female spline 11 Grease passage 13 Grease reservoir 14 Grease pressurized supply 15 ... Grease supply passage 16 ... Throttle section 21 ... Quantitative valve 23 ... Pneumatic cylinder for rotation

Claims (4)

(57) [Claims] 1. A grease having a female spline portion fitted at a predetermined interval to a male spline portion formed on a work and movable relative to the work in the axial direction. An application jig is provided, and the grease application jig is formed with a slit-shaped grease passage for cutting the female spline portion in a radial direction, and an annular grease is formed on a peripheral portion of the grease passage. A grease applying device for a spline portion, wherein a reservoir portion is formed, and the grease reservoir portion is communicated with a grease supply passage communicating with a grease pressurized supply source via a throttle portion. 2. The grease application of the spline section according to claim 1, wherein the grease supply amount supplied from the grease pressurized supply source to the grease supply passage is adjusted by a fixed amount valve. apparatus. 3. The grease applying apparatus for a spline part according to claim 1, wherein said grease applying jig is capable of adjusting a moving speed at the time of retreat. 4. The grease coating of a spline portion according to claim 1, further comprising a rotation air cylinder for rotating said grease coating jig by a predetermined angle. apparatus.