JPH10203188A - Drive shaft with safety cover - Google Patents

Abstract

PROBLEM TO BE SOLVED: To simplify the feed of grease to a spline fitting part through simple constitution without disassembly. SOLUTION: A drive shaft with a safety cover is provided with an outer grease feed port 23 formed in the vicinity of the tip of an outer spline cover member 10 on which a sleeve yoke 6 is mounted, at least one of an inner grease feed port 24 on the base end side arranged in the vicinity of the base end of an inner spline cover member 9 on which a shaft yoke 3 is mounted, and an inner grease feed port 25 on the tip side arranged in the vicinity of the inner spline cover member 9. When the length of the drive shaft 1 is a minimum or a maximum, the outer grease feed port 23 and the grease feed port 24 on the base end side or the inner grease feed part 25 on the tip side are aligned and the grease feed ports are arranged in a manner to make access to the grease feed port 15 communicated with a spline fitting part.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a shaft member composed of a male spline shaft and a shaft yoke, and a sleeve member composed of a female spline sleeve and a sleeve yoke, which are slidably fitted to each other. A pair of inner spline cover members and an outer spline cover member provided with a universal joint on the yoke, slidably and rotatably connected to the yoke via a slide ring, and slidably fitted to each other; A drive shaft covered by a safety cover comprising a pair of universal joint cover members attached to a cover member and covering the universal joint with a relatively large clearance, in particular, power transmission between a tractor and a working machine of an agricultural machine. Related to drive shaft with safety cover

[0002]

2. Description of the Related Art In particular, in a drive shaft of an agricultural machine, in order to prevent mud of the drive shaft and to prevent the drive shaft from being caught in the drive shaft,
It is common to cover the entire drive shaft with a safety cover.

[0003]

In such a drive shaft with a safety cover, the sleeve member and the shaft member are disassembled and grease is applied individually, or an opening provided in the safety cover at the yoke shoulder. Grease was supplied from the grease nipple exposed from the spline to the spline fitting portion.

As described above, lubrication to the spline fitting portion involves disassembly, grease application, and reassembly, which is time-consuming and troublesome. Further, when grease is supplied to the grease nipple exposed from the opening in the safety cover, there are drawbacks such as intrusion of mud and dust from the opening and clogging of the grease nipple.

Accordingly, it is an object of the present invention to provide a drive shaft which can easily lubricate a spline fitting portion without disassembly and without forming an opening for a grease nipple in a safety cover. is there.

[0006]

In order to achieve this object, a drive shaft according to the present invention comprises the outer spline cover member provided on a sleeve yoke, the inner spline cover member provided on a shaft yoke, and the outer spline cover member provided on the shaft yoke. One outer greasing port provided near the distal end, and one proximal inner greasing port provided near the proximal end of the inner spline cover member and near the distal end of the inner spline cover member. And at least one of the tip-side inner greasing ports is provided, and the outer greasing port is provided when the overlap amount of the fitting between the shaft member and the sleeve member is maximum and the length of the drive shaft is minimum. The base side inner greasing port is aligned,
Alternatively, when the overlap amount of the fitting between the shaft member and the sleeve member is the minimum and the length of the drive shaft is the maximum, the respective greasing points are such that the outer greasing port and the tip side inner greasing port are aligned. The greasing port is arranged in the female spline sleeve, and the greasing port is aligned with the greasing port of the cover member aligned with each other, and the greasing port extends through the greasing port to the inner surface of the female spline sleeve. And an annular oil groove is formed on the inner surface of the female spline sleeve in which the horizontal greasing hole is opened.

According to the present invention, when the amount of overlap between the fitting of the shaft member and the sleeve member is maximum and the length of the drive shaft is minimum, or the amount of overlap between the fitting of the shaft member and the sleeve member is small. When the length of the drive shaft is the minimum and the length of the drive shaft is the maximum, the horizontal greasing hole penetrates from the greasing port formed in the female spline sleeve aligned with the greasing port of the cover member aligned with each other to the inner surface of the female spline sleeve. The oil can be supplied to the spline fitting portion between the shaft member and the sleeve member via an annular oil groove formed on the inner surface of the female spline sleeve in which the horizontal greasing hole is opened.

In most cases, the length of the drive shaft is in an intermediate state between the minimum and the maximum, and the greasing ports of the cover member are aligned with each other to access the sleeve member inside the safety cover member. There are rare opportunities to do so. Only when intentionally minimizing or maximizing the length of the drive shaft for lubrication, an opening is made in the safety cover and the greasing port of the female spline sleeve can be accessed. Therefore, according to the present invention, even if a greasing port is provided in the safety cover, dust and mud do not easily enter the inside of the safety cover. However, it is preferable to provide a sealing member for keeping the outer greasing port plain sealed.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, a preferred embodiment of the present invention will be described with reference to the drawings.

FIG. 1 shows a side view of a drive shaft 1 with a safety cover according to the present invention, in which the upper half is sectioned. The drive shaft 1 includes a shaft member 4 including a male spline shaft 2 and a shaft yoke 3, and a sleeve member 7 including a female spline sleeve 5 and a sleeve yoke 6.
(See FIG. 2) are slidably fitted to each other, and a universal joint 8 is provided on each of the yokes 3 and 6.

A pair of inner spline cover member 9 and outer spline cover member 10
And a safety cover comprising a pair of universal joint cover members 11 which are attached to the spline cover members 9 and 10 to cover the universal joint 8 with a relatively large clearance. The outer spline cover member 10 is rotatably connected to the sleeve yoke 6 and the inner spline cover member 9 is rotatably connected to the shaft yoke 3 via a slide ring 12, and the inner and outer spline cover members 9, 1 are respectively connected.
As the shaft member 4 and the sleeve member 7 slide in the axial direction, 0 is slidably fitted in the axial direction.

In this safety cover, a slide ring 12 fixed to the inner surface of the yoke side end of each spline cover member 9, 10 is attached around the neck of each yoke 3, 6 so as to be relatively rotatable, and the safety cover is driven. A chain 13 with a hook for preventing rotation with the shaft 1 is attached to the outer surface of the yoke side end of each spline cover member 9, 10. Hook 1 of these chains 13
4 is locked to a frame portion of the tractor or the working machine of the device, for example.

One greasing port 15 is provided near the tip of the female spline sleeve 5. A horizontal greasing hole 16 penetrating from the greasing port 15 to the inner surface of the female spline sleeve 5 is provided, and an annular oil groove 17 is formed on the inner surface of the female spline sleeve 5 where the horizontal greasing hole 16 opens. An annular engaging groove 18 is formed around the greasing port 15 so that the main body of the grease filling machine (not shown) engages. The greasing port 15 is engaged with a grease supply nozzle (not shown) of a grease filling machine.

As shown in FIG. 2, a stepped through hole is formed in the sleeve yoke 6, and one side is formed as a sleeve fitting hole 6a into which the insertion end 5a of the female spline sleeve 5 can be inserted. The other side is a cup fitting hole 6b for mounting a mudguard cup 20 made of, for example, synthetic resin, which is bordered by a metal ring 19. The insertion end 5 a of the female spline sleeve 5 is fitted into the sleeve fitting hole 6 a of the sleeve yoke 6, and welded at the welding portion 21. An air vent hole 22 is formed in the bottom surface of the mudguard cup 20.

The mudguard cup 20 prevents mud and dust from entering the spline fitting portion and acts as an oil reservoir. An air vent hole 22 on the bottom surface of the mudguard cup is provided for smooth sliding between the male spline shaft 2 and the female spline sleeve 5.

As shown in FIG. 3, one outer greasing port 23 is provided near the tip of the outer spline cover member 10. As shown in FIG. 4, one proximal inner greasing port 24 is provided near the proximal end of the inner spline cover member 9, and one distal inner greasing port is provided near the distal end of the inner spline cover member 9. A mouth 25 is provided. However, only one of these inner greasing ports 24, 25 may be provided. In the case of the bellows-shaped outer spline cover member 10 as in the illustrated embodiment, an outer greasing port 23 may be provided at the center of the valley of the bellows.

When the amount of overlap between the fitting of the shaft member 4 and the sleeve member 7 is maximum and the length of the drive shaft is minimum, the outer greasing port 23 and the proximal inner greasing port 24 are aligned, or When the overlap amount of the fitting between the member 4 and the sleeve member 7 is minimum and the length of the drive shaft is maximum, the outer greasing port 2 is
The greasing ports are arranged so that the 3 and the front-side inner greasing port 25 are aligned, and the greasing port 15 is formed in the female spline sleeve 5 to be aligned with the greasing port of the cover member aligned with each other. .

When the overlap between the shaft member 4 and the sleeve member 7 is the largest and the length of the drive shaft 1 is the smallest, or when the overlap between the shaft member 4 and the sleeve member 7 is the smallest. When the length of the drive shaft 1 is the maximum,
The greasing ports 23, 24 or 23, 25 of the cover member can be aligned with each other to access a greasing port 15 formed in the female spline sleeve 5. From the greasing port 15, grease is supplied by a grease filling machine. Can be supplied to the spline fitting portion between the shaft member 4 and the sleeve member 7 through the greasing lateral hole 16 and the annular oil groove 17. In order to reliably prevent mud or dust from entering the safety cover from the greasing port, it is preferable to provide a sealing member (not shown) for sealing the outer greasing port 23 in a plain manner.

[0019]

According to the present invention, it is possible to supply grease to the spline fitting portion with an extremely simple structure in which a greasing port is provided in the safety cover and a greasing passage is provided in the female spline sleeve.

According to the present invention, even when the safety cover is provided with a greasing port, the greasing ports of the outer and inner spline cover members are aligned with each other to form an opening that can be accessed in the safety cover. Therefore, dust and mud do not easily penetrate into the inside of the safety cover, because only when the length of the drive shaft is intentionally minimized or maximized. However, it is preferable to provide a seal member for keeping the outer greasing port plainly sealed.

[Brief description of the drawings]

FIG. 1 is a side view showing a partial cross section of a drive shaft according to the present invention.

2 (a) and 2 (b) are side views each showing a partial cross section of the sleeve member of the drive shaft according to the present invention as viewed from different angles.

FIG. 3 is a partial cross-sectional side view of an outer spline cover member of a safety cover of a drive shaft according to the present invention.

FIG. 4 is a side view showing a partial cross section of an inner spline cover member of the safety cover of the drive shaft according to the present invention.

[Explanation of symbols]

 Reference Signs List 1 drive shaft 2 male spline shaft 3 shaft yoke 4 shaft member 5 female spline sleeve 6 sleeve yoke 7 sleeve member 8 universal joint 9 inner spline cover member 10 outer spline cover member 11 universal joint cover member 12 slide ring 13 chain 14 hook 15 Greasing port 16 Greasing lateral hole 17 Oil groove 18 Ring groove 19 Metal ring 20 Mudguard cup 21 Welded area 22 Air vent hole 23 Outer greasing port 24 Base side inner greasing port 25 Front side inner greasing mouth

Claims (2)

[Claims] 1. A shaft member comprising a male spline shaft and a shaft yoke and a sleeve member comprising a female spline sleeve and a sleeve yoke are slidably fitted to each other, and a universal joint is provided for each yoke. A pair of inner spline cover member and outer spline cover member slidably and rotatably connected to the yoke via a slide ring and slidably fitted to each other, and universally attached to each spline cover member. In a drive shaft covered by a safety cover including a pair of universal joint cover members covering a joint with a relatively large clearance, the outer spline cover member is provided on a sleeve yoke, and the inner spline cover member is provided on a shaft yoke. Provided, before One outer greasing port provided near the distal end of the outer spline cover member, and one proximal inner greasing port and the inner spline cover member provided near the proximal end of the inner spline cover member. When at least one of the one tip side inner greasing port provided near the tip of the shaft member is provided, the overlap amount of the fitting between the shaft member and the sleeve member is maximum and the length of the drive shaft is minimum. When the outer greasing port and the proximal inner greasing port are aligned, or the overlap amount of the fitting between the shaft member and the sleeve member is minimum and the length of the drive shaft is maximum, the outer greasing port is used. The respective greasing ports are arranged so that the mouth and the front side inner greasing port are aligned, and a greasing port aligned with the greasing port of the cover member aligned with each other is formed in the female spline sleeve. Female spline for greasing port Provided lubrication transverse holes penetrating to the inner surface of the sleeve, the safety cover with the drive shaft, characterized in that said lubrication transverse bore has an annular oil groove on the inner surface of the female spline sleeve opening. 2. The drive shaft with a safety cover according to claim 1, further comprising a seal member for sealing the outer greasing port with a plain seal.