JPH04254018A - Spline sliding shaft - Google Patents

Abstract

PURPOSE:To prevent abrasion of a spline sliding shaft, to decrease preventive maintenance, and to facilitate shaft vibration measurement by making the lubrication action of the spline sliding shaft easy. CONSTITUTION:A grease pocket groove 9 communicating with a grease nipple 5 is disposed on the circumference of both of spline sliding portions 3 of a male spline shaft 1 and a female spline shaft 2, whereby grease is smoothly and uniformly fed from the grease pocket groove 9 to the sliding portions so as to prevent out of grease.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention This invention relates to improving the lubrication of a spline sliding shaft into which a pair of male and female spline shafts are inserted.

0002

2. Description of the Related Art FIG. 4 is a partially sectional side view showing the greasing situation of a conventional spline sliding shaft. In the figure, 1 is a male spline, 2 is a female spline, 3 is a spline sliding part, and 4 is a In the grease passage, 5 is a grease nipple, 6 is a grease pocket, 7 is a grease discharge hole, while 8 is a grease pump.

Next, the operation will be explained. Connect the grease pump 8 to the grease nipple 5 and inject grease.
This grease supply path is filled from the grease passage 4 to the gap between the sliding parts 3 of the male spline 1 and the female spline 2,
The lubricating action provides sliding and rotation in an integrated manner. Furthermore, in this case, the measurement of the outer circumferential axial runout of the male spline shaft utilizes the spline unevenness.

0004

[Problems to be Solved by the Invention] Since the conventional spline sliding shaft is constructed as described above, running out of grease due to forgetting to lubricate increases the frictional force of the spline sliding shaft.
They generate noise and heat, which accelerates the rate of wear and increases the frequency of greasing, necessitating high maintainability. In addition, since the outer circumferential shaft runout of the male spline shaft is due to the uneven surface of the spline, there are problems such as the need for skill in reading the gauge.

[0005] This invention was made to solve the above-mentioned problems, and aims to extend the grease retention time, reduce the number of times of greasing, and reduce the frictional force to extend the greasing period. The object of the present invention is to obtain a spline sliding shaft that can prevent noise, heat generation, and wear of the sliding shaft, and that can be centered with high accuracy.

[0006]

[Means for Solving the Problems] A spline sliding shaft according to the present invention is provided with grease pocket grooves on the circumferences of both spline sliding parts.

[0007]

[Function] The grease pocket groove in this invention acts as a pool of grease to prevent grease from running out, and is useful for preventing wear on the sliding shaft and extending the lubrication period.Moreover, the grease pocket groove on the male spline shaft is useful for measuring shaft runout. is also available and can be done easily.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. In FIG. 1, numerals 1 to 8 are the same as those of the above-mentioned conventional example. Reference numeral 9 denotes a grease pocket groove arranged on the circumference of the spline sliding portion 3, and the grease pocket groove 9 makes the grease lubrication uniform and prevents the grease from running out.

Next, the operation will be explained. The male spline shaft 1 and the female spline shaft 2 are assembled into each other by insertion, and the power is transferred from the male spline shaft 1 to the female spline shaft 2 through the spline sliding part 3 by an integrated sliding and rotating operation. It is transmitting the opposite. In order to reduce the frictional force of the sliding part 3, grease is filled into the grease pump 8, the grease nipple 5, and the grease pocket groove 9. Prevents greasing and running out of grease, thereby reducing noise on the spline sliding shaft, preventing heat generation, and preventing wear on the sliding parts. Furthermore, the presence of the grease pocket groove 9 extends the grease retention time, leading to a reduction in the number of times of lubrication and an extension of the lubrication period, which is also effective in saving labor for preventive maintenance. The number of machine stops will also be reduced. or,
When measuring the outer peripheral shaft runout of a single male spline shaft using a dial gauge 10 as shown in FIG. 3, no skill is required and the gauge can be easily read.

0010

As described above, according to the present invention, a reduction in frictional force and an extension of the grease retention time can be achieved with a simple structure of providing a grease pocket groove on a spline sliding shaft, thereby improving preventive maintenance. This has the effect of contributing to extending the life of the spline sliding shaft because it saves labor and makes accuracy measurement easy.

[Brief explanation of the drawing]

FIG. 1 is a partially sectional side view showing a spline sliding shaft according to an embodiment of the present invention.

FIG. 2 is a sectional view of a main part of a spline sliding part.

FIG. 3 is an explanatory diagram of measurement of outer circumferential runout of a male spline shaft.

FIG. 4 is a partially sectional side view of a conventional spline sliding shaft.

[Explanation of symbols]

1 Male spline 2 Female spline 3 Spline sliding part 5 Grease nipple 9 Grease pocket groove

Claims (1)

[Claims] Claim 1: In a spline sliding shaft into which a male spline shaft and a female spline shaft are inserted and assembled, a part on the circumference of both the spline sliding parts of the male and female shafts,
A spline sliding shaft characterized by having a grease pocket groove that serves as a reservoir for grease.