JPS5912018Y2 - Tension sprocket support structure of raising device - Google Patents

Description

[Detailed description of the invention] This invention relates to a structure in which a tension sprocket of a raising device installed in a pre-processing section of a reaping machine, etc. has a biasing mechanism in the tension direction and is supported by a raising frame. In particular, the tension sprocket support structure of the tensioning device is such that the guide frame that supports the spindle of the tension sprocket on the back side of the tensioning frame serves both as reinforcement of the tensioning frame and as a mounting plate to the main body. This is related.

As is well known, the pulling device installed in the pre-processing section of a binder, combine harvester, etc. has a structure in which a driving sprocket and a tension sprocket are provided, and a pulling chain is hung between both sprockets. The sprocket has a screw tightening mechanism, a spring, a cam, etc., and is biased in the direction of chain tension by a set force.

However, the above-mentioned conventional tension biasing mechanism has a disadvantage in that it has a fairly complicated structure such as a sliding mechanism in the tension direction and a tension setting mechanism.Furthermore, in order to attach these mechanisms, the bottom plate of the raising frame etc. does not have to be reinforced. must not be
As a result, there are disadvantages such as an increase in total cost and an increase in the size of the device.

In view of the problems of the tension sprocket support structure based on the above-mentioned prior art, this invention uses the guide frame for the slider provided on the spindle of the tension sprocket as a lifting frame reinforcing plate and a lifting frame mounting plate. In this way, it is an object of the present invention to provide an excellent tension sprocket support structure for a tensioning device that eliminates the above-mentioned drawbacks, eliminates disadvantages, and simplifies the structure.

The structure of this invention in accordance with the above purpose is that when the tension sprocket of the tensioning device receives force and automatically sets the tension of the tensioning chain, the tension sprocket slides against the guide frame of the slider provided on the back side of the tensioning frame. The lifting device is biased to the proper position by the movement, and the mounting plate that also serves as the guide frame attaches the lifting device to the main body and also reinforces the lifting frame. This is a summary of what was done.

Next, an embodiment of this invention will be described below based on the drawings.

Reference numeral 1 denotes a binder, which, as is well known, is connected to the pre-processing section 2, running section 3, power section 4, and operation section 5, and transmits power to the pre-processing section 2 through a transmission pulley 6, power transmission. It is transmitted to the binding part 8 via the case 7, and further transmitted to the raising device 9 via the chain 10 and the raising bevel 11.

In the raising device 9, a driving sprocket 13 connected to the raising bevel 11 is provided at the upper part of the raising frame 12, and a tension sprocket 14 is provided at the lower part. A lifting chain 15 is hung, and a foldable lifting claw 16 is attached at a predetermined position on the circumference of the lifting chain 15.

The shape of the tension sprocket 14 is such that the lower part is a flange 18 having teeth 17, and the upper part is a rotation support part 19 when the raising pawl 16 is folded, as the cross section is shown in FIG. It is said to be shaped like a cylindrical sprocket.

A bearing 20 is fitted inside the lower part of the tension sprocket 14, and the bearing 20
is mounted on a support shaft 21, and the lower part 22 of the support shaft 21 passes through an elongated hole 23 drilled in the bottom of the lifting frame 12, and has a slider 24 with a convex cross section on the back surface of the lifting frame 12. are doing.

Reference numeral 25 designates a mounting plate embodying the gist of this invention, which has a concave cross-sectional shape and corresponds to the shape of the rear surface of the raising frame 12, and has bolts 26 and nuts 27 on the rear surface of the raising frame 12.
It is fixed via a bracket 28, and one side is made into a bending bracket 28 so that it can be attached to the main body.

Further, the mounting plate 25 has a bent portion with a concave cross section at the center to form a guide frame 29 for the slider 24, and a front portion of the slider 24 which is slidable on the guide frame 29. The stroke adjustment bolt 30 is attached to the nut 3.
1, and its head is fixed by a raising frame 12.
It abuts as a follower of an involute cam 32 that is pivotally supported on the bottom back surface.

The involute cam 32 has a helical spring 33 on its support shaft, and the involute cam 32 is
It is urged to rotate in the F direction shown in the figure.

In the above-mentioned precepts, when assembling, servicing, etc., raise the chain 15.
When hanging the involute cam 32,
When the involute cam 32 is rotated in the F direction and the slider 24 is moved in the anti-tension direction and the lifting chain 15 is applied to free the involute cam 32, the involute cam 32 receives the biasing force from the helical spring 33 and moves in the F direction. The head of the bolt 30, which is its follower, is pressed in the tension direction, thereby pressing the slider 24 and the tension sprocket 14 in the tension direction, and applying the set tension to the raising chain 15.

Incidentally, fine adjustment is performed by adjusting the amount of advance of the bolt 30.

When setting the tension, the slider 24 at the lower end of the tension sprocket 14 slides against the guide frame 29 which also serves as a mounting plate, but the tension setting force causes bending stress etc. to be applied to the raising frame 12. is dispersed and absorbed by the reinforcing action of the guide frame 29, and the reinforcing action of the guide frame 29 also acts against vibrations during operation of the raising device 9 or external forces applied via the claws 16. Therefore, deformation such as bending does not occur in the raising frame 12.

As described above, the raising device 9 is attached to the main body using the attachment plate 25.

Therefore, when working with binder 1, raise chain 1.
The culm is pulled up by the rotation of the crotch raising pawl 16, and the cutting operation is carried out in a well-known manner.

Note that the embodiment of this invention is not limited to the above embodiment, and other designs are possible. For example, the biasing mechanism for the tension sprocket 14 may be a simple spring,
It goes without saying that this invention can also be applied to combine harvesters and the like.

As described above, according to this invention, in a structure in which the tension sprocket of the tensioning device has a biasing mechanism and is supported by the tensioning frame, the guide frame for the slider attached to the support shaft of the tension sprocket is triggered. Since it is also used as a lifting device mounting plate, it is possible to automatically set the tension and set the appropriate tension for the lifting chain, but the structure of the tension sprocket support part is extremely simple. This has the effect of reducing costs by reducing the number of parts, and also facilitates cleaning work during maintenance.

Furthermore, since the mounting plate that also serves as the guide frame also serves as a reinforcing plate for the raising frame, there is a secondary benefit in that sufficient strength can be ensured.

The slider has a convex cross-section, and the tension sprocket is supported via the slider at the bottom of a lifting device mounting plate that is attached to the back side of the lifting frame and has a concave cross-section and supports the lifting frame. Since the guide frame has a concave cross-section, it has the excellent effect of further increasing the strength of the mounting plate, which has the function of attaching the raising frame and the function of reinforcing the raising frame. .

[Brief explanation of drawings]

The drawings show an embodiment of this invention; Fig. 1 is an overall view of the reaper, Fig. 2 is a plan view of the tension sprocket support,
FIG. 3 is a side view of FIG. 2, and FIG. 4 is a sectional view taken along line AA of FIG. 9... Raising device, 14... Tension sprocket, 32... Biasing mechanism, 12... Raising frame, 2
1... Support shaft, 23... Elongated hole, 24... Slider,
25...Mounting plate, 29...Guide frame.

Claims (1)

[Scope of utility model registration request] The tension sprocket of the raising device has a biasing mechanism and is supported by the raising frame, and the supporting shaft of the tension sprocket passes through a long hole drilled in the bottom plate of the raising frame and is attached to the back side of the frame bottom plate. In a tension sprocket support structure of a raising device having a slider,
The slider has a convex cross-section, and the tension sprocket is supported via the slider at the bottom of a lifting device mounting plate that is attached to the back side of the lifting frame and has a concave cross-section and supports the lifting frame. A tension sprocket support structure for a tensioning device, characterized in that a guide frame has a concave cross-section.