JPS59187194A - Device for applying dry lubricant solution to spline teeth - Google Patents

Abstract

PURPOSE:To coat the necessary minimum solution of dried lubricating agent uniformly on the respective surfaces of the teeth of the spline by arranging the train of gears, moving up and down, between the reserving tank of the solution of dried lubricating agent and the spline part of a work. CONSTITUTION:A reciprocating motion driving source 7 is operated by a work support finish detecting signal to elevate the train of gears 3-5 to a preset position and stop there through a support member 6 and the gear 3 at the uppermost position is meshed with the spline 2. The excessive solution for the necessary amount for coating the spline 2 is dripped from the gear 5 at the lowermost position. When the work 1 is rotated in one direction, adhered solution is coated on respective teeth of the spline 2. When the direction of rotation of the work 1 is reversed, the solution is coated on the opposite surfaces of the spline. When the coating is finished, the train of gears is lowered until the gear 5 at the lowest position of the train of gears 3-5 is dipped into the solution 0.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is an apparatus for applying a dry lubricant (such as Molykote (trademark)) to the tooth surfaces of a spline portion of a shaft.

This type of lubricant is a solution dissolved in a solvent (xylene) that is applied and dried. Conventionally, the lubricant was applied manually using a sponge roller in an amount sufficient to adhere to the bottom surface of the spline tooth, and then the excess amount was removed. This is to blow it out with air to prevent it from accumulating on the bottom of the teeth.

As a result, there are various problems such as requiring manual labor, toxic desiccant being blown away and creating a problem in the working environment, expensive dry lubricant being wasted due to scattering, uneven coating, and unsuitability for integration into processing lines. be.

An object of the present invention is to provide a dry lubricant application device that eliminates all of these problems.

To specifically explain the embodiment shown in the attached drawings, in Fig. 1, 1 is a workpiece (shaft), 2 is a spline part provided on a part of the workpiece L, and each part of the teeth is uniformly coated with dry lubricant. -It is something to be clothed.

Numerals 3-4 and 5 are gear trains that are sequentially meshed and arranged vertically, and their teeth have the same shape as spline teeth. The gear train is supported by a bearing member 6, and a reciprocating drive source 7 such as a piston cylinder drives the spline portion 2 and the tank 8.
It can be moved up and down between the liquid 0 inside.

A dry lubricant solution dissolved in a solvent is stored in the tank 8, and while the apparatus is in operation, it is stirred by a blade 10 rotated by a motor 9 to keep the concentration of the solution uniform vertically.

Reference numeral 12 in FIG. 5 indicates a nozzle for spraying air onto the spline portion 2, and the operation of the above structure is as follows.

a. When a detection element such as a proximity switch (not shown in the figure) detects that the work l has been transported and has come to the upper position of gear trains 3 to 5, the fluid pressure control circuit is controlled by an electric control circuit that operates based on the signal. , the piston cylinder (or electromagnetic plunger) acts to clamp the work l from both ends at the center 13, supporting its axis parallel to the axes of the gear trains 3 to 5, and stopping it.

The electric control circuit/fluid pressure control circuit that controls the reciprocating drive source 7 is activated by the workpiece support end detection signal shown in b and a, and the gear train 3 to 5 in the position shown in FIG. It is raised to a set position and stopped, and the uppermost gear 3 meshes with the spline 2.

C1 The first timer circuit is activated by the above-mentioned upward mesh end detection signal to stop the gear trains 3 to 5 in the state shown in FIG. 3. The stoppage time is due to the amount of solution O adhering to the lowest gear 5 due to its lower part being immersed in the solution O as shown in FIG.
Set to the time required to drop the excess amount over and above the amount needed to coat the spline.

d. When the set time of the first timer has elapsed, the circuit switches to the second timer circuit, and the timer circuit controls the electric path of the motor that rotates the workpiece L in one direction S as shown in FIG. 4 through the center. . The rotation of the workpiece also rotates gear trains 3 to 5, and the second gear 4 from the bottom squeezes out excess solution, and the required amount adheres to each tooth surface of the top gear 3, and the attached liquid is transferred to the spline section. It is applied to each tooth of 2.

e. When the set time of the second type has elapsed, the circuit switches to the third timer circuit and switches the rotation of the wheel 1 to the reverse direction r.
Apply the solution to the opposite side of the spline tooth.

f. When the coating time according to the third timer is over, the above-mentioned gear train upper y1 support control circuit is activated to lower the gear trains 3 to 5 to the set position where the lowest gear 5 in FIG. 2 is immersed in solution 0. , to stop at that position.

g. At the detection signal indicating the end of the gear train descent described in 2., air is blown through the nozzle 12 to even out uneven adhesion of the solution. In this case, the work l continues to rotate (FIG. 5).

h. Set the above air blowing time using the timer circuit, and use the end signal to operate the control circuits and control mechanisms for stopping the rotation of the workpiece, decentering it, and carrying it out, and apply the dry lubricant solution to the spline 2. Finish the journey.

Since the present invention has the above-described configuration, a necessary minimum amount of dry lubricant solution is uniformly applied to each surface of the teeth of the spline. Since the air used to level out coating unevenness requires only a weak pressure that does not cause the solution to scatter, the working environment is improved without scattering the toxic solution, and there is no wastage of the solution. The mechanism is simple and compact. The above-mentioned process control of ah can be easily achieved by a combination of well-known electric control circuits, pneumatic control circuits, motor circuits, etc., so that it can be easily integrated into a line.

[Brief explanation of the drawing]

Fig. 1 is a front view of the liquid applying varnish spline section and the gear train for applying dry lubricant solution, Fig. 2 is a side view of the device of the present invention, and Figs. 3 to 5 show the state during each operation stroke. The side view shown. 1 is a workpiece, 2 is a spline portion thereof, 3, 4, and 5 are gear teeth, 6 is a gear train support member, 7 is a gear train vertical movement drive source,
8 is a dry lubricant solution storage tank, and 12 is an air nozzle. Figure 1

Claims (1)

[Claims] (1) A gear train (3) that moves up and down by a drive source (7) between a dry lubricant solution storage tank (8) and the spline part (2) of the workpiece (1) that is stopped above it. ~(
The top gear (3) meshes with the spline when the gear train is raised and stopped, and the bottom gear (5) is positioned above the liquid level of the solution O to remove the solution stuck by immersion. Drop the excess amount, and after the set dripping time has passed, workpiece (1), gear train (3)
) to (5) are rotated in conjunction to apply the solution adhering to the lowest gear (5) to the teeth of the spline part (2) via the upper gear train sequentially, and after the set number of times of application has elapsed, the above rotation is performed. The solution is applied to the opposite side of the spline teeth by reversing the process, and after the set time has elapsed, the gear train is lowered to the set position, and while the workpiece continues to rotate, air is sprayed onto the spline part for the set time. A device that applies dry lubricant to spline teeth configured to even out uneven application of solution.