JPH07253126A - Support device for driving transmission member - Google Patents

Abstract

PURPOSE:To provide a support device for a driving transmission member which does not abrade a transmission shaft and is easily mounted on and demounted from the transmission shaft. CONSTITUTION:A bush 11 is engaged with a spline 3a of a transmission shaft 3, then unrotatably and demountably mounted on an outer periphery of the transmission shaft 3 projected from a mission case 2. A cam 9 of a one-way clutch 7 is in sliding contact with an outer peripheral surface of the bush 11. With such an arrangement, the transmission shaft 3 is not abraded. In addition, a pre-treatment driving pulley (driving transmission member) 1 can easily be pulled from the transmission shaft 3 together with a support device, and easily assembled in a similar manner. A clutch rate can be varied by varying thickness of the bush 11.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a combiner or the like for supporting a drive shaft protruding from a transmission case with a drive transmission member such as a pretreatment drive pulley which is driven by the drive shaft via a one-way clutch. Regarding

[0002]

2. Description of the Related Art FIG. 5 is a cross-sectional view showing a conventional example and shows a support device for a pretreatment drive pulley (drive transmission member) in a combine.

As shown in the figure, the pretreatment drive pulley 1 is supported on a transmission shaft 3 protruding from a transmission case 2 by two bearings 5 and 6 and a one-way clutch 7 between the bearings 5 and 6. Has been done. That is, the two bearings 5 and 6 and the one-way clutch 7 constitute a support device for the pretreatment drive pulley 1. The one-way clutch 7 is provided with a plurality of cams 9 which are wedge members, and is non-rotatably connected to the pretreatment drive pulley 1 by using a key 10.

When the transmission shaft 3 rotates normally, the pretreatment drive pulley 1 is connected to the transmission shaft 3 and driven by the cam 9 of the one-way clutch 7 engaging with the outer peripheral surface of the transmission shaft 3. When the transmission shaft 3 reverses,
The disengagement between the cam 9 of the one-way clutch 7 and the outer peripheral surface of the transmission shaft 3 causes the transmission shaft 3 to idle. That is, the pretreatment drive pulley 1 is driven only in one direction via the one-way clutch 7.

When the transmission shaft 3 idles, the pretreatment drive pulley 1 is supported in a stopped state by the two bearings 5 and 6, and the cam 9 of the one-way clutch 7 slides on the outer peripheral surface of the transmission shaft 3. It will be.

[0006]

In the conventional supporting device for the pretreatment drive pulley 1 as described above, meshing and sliding contact are repeated between the transmission shaft 3 and the cam 9 of the one-way clutch 7. In addition, there is a problem that the sliding contact surface of the transmission shaft 3 is worn away. In order to replace the worn transmission shaft 3 with a new one, the transmission must be disassembled, which is very time-consuming and troublesome.

The present invention has been proposed to solve such a problem and does not cause wear of the transmission shaft.
Moreover, it is an object of the present invention to provide a support device for a drive transmission member that can be easily attached to and detached from a transmission shaft.

[0008]

In order to achieve the above object, a support device (5, 5) for a drive transmission member (1) according to the present invention.
6, 7, 11), the bush (11) is non-rotatably and detachably attached to the outer periphery of the transmission shaft (3), and the outer peripheral surface of the bush (11) has a one-way clutch (7).
The wedge stop member (9) has a sliding contact surface.

[0009]

According to the supporting device (5, 6, 7, 11) having the above-mentioned structure, since the wedge member (9) of the one-way clutch (7) comes into sliding contact with the outer peripheral surface of the bush (11),
It does not wear the transmission shaft (3). Moreover, since the bush (11) is detachable from the transmission shaft (3),
The drive transmission member (1) is attached to the supporting device (5, 6, 7, 11).
Can be easily removed from the transmission shaft (3) with
Similarly, it can be easily attached.

The reference numerals in the above parentheses are for comparison with the drawings and do not limit the structure of the present invention.

[0011]

Embodiments of the present invention will be described below with reference to the drawings. <Embodiment 1> FIG. 1 is a sectional view showing Embodiment 1 and shows a support device for a pre-treatment drive pulley (drive transmission member) in a combine. Note that, in FIG. 1, the same components as those of the conventional example shown in FIG.

As shown in the figure, in the first embodiment, the bush 11 is provided on the outer periphery of the transmission shaft 3 protruding from the mission case 2.
The pretreatment drive pulley 1 has a bush 11 and two bearings 5 and 6 and a one-way clutch 7 arranged on the outer circumference of the bush 11.
It is supported by. That is, the bush 11, the two bearings 5 and 6, and the one-way clutch 7 constitute a support device for the pretreatment drive pulley 1.

The bush 11 is non-rotatably and detachably attached to the transmission shaft 3 by engaging with a spline 3a formed on the outer peripheral surface of the transmission shaft 3.

In the pretreatment drive pulley 1 supported on the transmission shaft 3 by the supporting device having the above-described structure, the cam 9 of the one-way clutch 7 has the bush 11 when the transmission shaft 3 is normally rotated.
By being engaged with the outer peripheral surface of the drive shaft 3, the drive shaft is connected to the drive shaft 3 and driven. When the transmission shaft 3 reversely rotates, the cam 9 of the one-way clutch 7 and the outer peripheral surface of the bush 11 are disengaged from each other, so that the transmission shaft 3 idles.

That is, in the above supporting device, when the transmission shaft 3 idles, the outer peripheral surface of the bush 11 serves as a sliding contact surface (wedge stop member sliding contact surface) of the cam 9 of the one-way clutch 7. Therefore, the transmission shaft 3 is not worn away.

Further, since the bush 11 is detachable from the transmission shaft 3, when the pretreatment drive pulley 1 is removed from the transmission shaft 3 for replacement of the worn bush 11, the front cover of the pulley 1 is removed. By removing 1a and the stopper plate 12 at the tip of the transmission shaft 3, the pulley 1 can be easily pulled out together with the support member. Similarly, the pretreatment drive pulley 1 can be easily attached.

Further, in the above supporting device, the outer diameter Φ1 of the bush 11 engaging with the cam 9 of the one-way clutch 7 is
It is actually the diameter of the transmission shaft 3 that transmits the driving force to the pretreatment drive pulley 1. Therefore, the clutch capacity can be changed by changing the wall thickness of the bush 11.
As shown in FIG. 1, it is also possible to use the one-way clutch 7 having an inner diameter (bush outer diameter Φ1) larger than the diameter Φ2 of the base portion of the transmission shaft 3. In other words, the clutch capacity can be selected according to the load of the pretreatment of the combine, and the pretreatment drive pulley 1 incorporating the one-way clutch 7 having such a capacity can be attached to the transmission shaft 3 for use. <Embodiment 2> As shown in the cross-sectional view of FIG. 2, in the support device of Embodiment 2, the bush 11 is non-rotatably and detachably attached to the transmission shaft 3 by using the key 13.

In this structure, the front cover 1a of the pulley 1 and the bolt 15 and the pressing plate 16 at the tip of the transmission shaft 3 are removed and the key 13 is pulled out, so that the pretreatment drive pulley 1 can be easily combined with the supporting member. Can be pulled out. Similarly, the pretreatment drive pulley 1 can be easily attached.

Also in the case of the supporting device having this structure, the same effect as that of the first embodiment can be obtained. <Embodiment 3> As shown in the cross-sectional view of FIG. 3, in the support device according to the present Embodiment 3, contrary to Embodiments 1 and 2, the bearing 5 located on the tip side of the transmission shaft 3 is A bearing having an inner diameter larger than that of the bearing 6 located on the base side is used. Accordingly, the outer diameters Φ3, Φ4, and Φ1 of the bush 11 with respect to the bearings 5, 6 and the one-way clutch 7 are Φ3>
Due to the relationship of Φ1> Φ4, the diameter of the transmission shaft 3 is increased toward the front end side. Other configurations are similar to those of the first embodiment.

In this structure, if the front cover 1a of the pulley 1 and the stopper plate 12 at the tip of the transmission shaft 3 are removed, the front end side of the transmission shaft 3 is attached even when the pretreatment drive pulley 1 is attached to the transmission shaft 3. Therefore, it becomes possible to replace the worn bush 11 and the damaged one-way clutch 7, and the maintenance becomes easy. Of course, the same effects as those of the first and second embodiments can be obtained. <Reference Example> As shown in the cross-sectional view of FIG.
An example in which the transmission shaft 3 protruding from the transmission case 2 and the pretreatment drive pulley 1 attached to the transmission shaft 3 are replaced with a one-way clutch 7 having a longer length and thus a longer life than conventional ones without changing the configuration. Is.

That is, two bearings 5 and 6 which are located in front of and behind the one-way clutch 7 and which support the pretreatment drive pulley 1.
Is replaced with a small cross section to increase the fitting margin L of the one-way clutch 7. Then, the bushes 21, 22 are inserted in the gaps formed between the bearings 5, 6 and the inner surface of the pulley 1.
To support the pulley 1.

[0022]

As described above, according to the drive transmission member supporting apparatus of the present invention, the bush is attached to the outer periphery of the transmission shaft in a non-rotatable and detachable manner, and the outer peripheral surface of the bush is Since it is configured to be the sliding contact surface of the wedge member of the one-way clutch, the transmission shaft is not worn away. Moreover, since the drive transmission member can be easily pulled out from the transmission shaft together with the supporting device, and similarly, the drive transmission member can be easily attached, the maintenance becomes very easy.

Further, since the clutch capacity can be changed by changing the wall thickness of the bush, for example, the clutch capacity is selected according to the load of the pretreatment of the combine, and the one-way clutch having such capacity is installed. The processing drive pulley can be attached to the transmission shaft for use.

[Brief description of drawings]

FIG. 1 is a sectional view showing a first embodiment of the present invention.

FIG. 2 is a sectional view showing a second embodiment of the present invention.

FIG. 3 is a sectional view showing a third embodiment of the present invention.

FIG. 4 is a sectional view showing a reference example.

FIG. 5 is a sectional view showing a conventional example.

[Explanation of symbols]

 1 Pretreatment Drive Pulley (Drive Transmission Member) 2 Mission Case 3 Drive Shaft 5, 6 Bearing 7 One Way Clutch 9 Cam (Wedge Stopper) 11 Bush

Claims (1)

[Claims] 1. A drive transmission member supporting device for supporting a drive transmission member driven by a transmission shaft via a one-way clutch on a transmission shaft protruding from a transmission case, wherein a bush rotates around the outer periphery of the transmission shaft. A support device for a drive transmission member, wherein the bush is fixedly and detachably mounted, and the outer peripheral surface of the bush serves as a sliding contact surface of the wedge stop member of the one-way clutch.