JPH0137231Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to a side clutch for a mobile agricultural machine.

Conventionally, as a means of attaching a clutch arm for switching a side clutch in a transmission case made of steel plate, multiple bosses were welded to the inner surface of the transmission case, and both ends of the shaft connected to the clutch arm were attached to these bosses. There are things that support it. However, in order to fit the shaft into the boss, this requires a large amount of space to move the shaft over its entire length in the axial direction, making it impossible to make the transmission case more compact. It has a negative impact on performance, such as leaving uncultivated land underneath.

This idea was devised in view of the above-mentioned points, and it is possible to easily attach the shaft connected to the clutch arm to the transmission case, and to create a side clutch for a mobile agricultural machine that can make the transmission case more compact. The purpose is to

This idea includes a bearing member that rotatably holds both ends of the shaft connected to the clutch arm, and a fitting shaft that is formed with axes perpendicular to each other. A plurality of fitting supports are fixed, and a fitting shaft of a bearing member is fitted to these fitting supports and rotated to form a protrusion on the fitting shaft and a stepped portion formed on the bearing member. Rotate the bearing member relative to the fitting support so that the shaft does not interfere with the inner surface of the transmission case and the internal mechanism, and in this position, engage the bearing part of one bearing member to prevent it from coming off. Fit the shafts together, then rotate one of the bearing members around the fitting shaft to align the axes of the bearing parts of the pair of bearing members, and then connect the other end of the shaft to the bearing of the other bearing member. Therefore, the transmission case does not need to be enlarged just to allow movement in the axial direction of the shaft during assembly, and is configured so that it can be assembled easily and made compact. This is what I did.

An embodiment of this invention will be explained based on the drawings.
Although only a portion of the transmission case 1 is shown, it is a steel plate transmission case that is divided into left and right halves at the center, and a power take-off shaft 3 connected to a tilling shaft 2 is rotatably held on both sides of the lower end of the transmission case 1. has been done. Further, inside the transmission case 1, a support shaft 4 is held on an axis that coincides with the power take-off shaft 3, and a sprocket wheel 5 is supported on this support shaft 4. An input shaft (not shown) connected via a sprocket 6 is provided at the upper part of the transmission case 1. The inner end of the power take-off shaft 3 is rotatably inserted inside the sprocket wheel 5, and a steel ball 7 is fitted on the fitting surface of both.
A recess 8 and a hole 9 are formed for positioning.
Furthermore, a holder 10 is attached to a spring 1 on the outer periphery of both sides of the sprocket wheel 5 and the outer periphery of the power take-off shaft 3.
1, and are fitted so as to be slidable and rotatable while being urged outwardly by 1. These holders 10 are formed with protrusions 12 that protrude in the inner diameter direction. As a result, the pair of left and right clutch portions 13,1
4 are configured.

Next, two cylindrical fitting supports 15 are welded to both inner surfaces of the mission case 1. These fitting holders 15 are formed with a fitting hole 16 and an expanded hole 17 that expands inward. A bearing part 19 that holds both ends of each of the two shafts 18 housed in the transmission case 1 and a fitting shaft 20 that is a fitting part are formed with axes that are orthogonal to each other. Four bearing members 21 are provided. A protrusion 22 which is a locking part to prevent slipping out is formed on the outer periphery of the fitting shaft 20 of these bearing members 21, and a step part which is a locking part to prevent slipping out which engages with the protrusion 22 is formed on the fitting holder 15. 23 is formed.
A part of this step 23 has a groove 2 for releasing the protrusion 22.
3a is formed. Further, the shaft 18
are connected via rods 24 to an operating lever (not shown) provided outside the transmission case 1, and also to a clutch arm 25. These clutch arms 25 are connected to the holder 10.

In such a configuration, when the rod 24 is moved up and down in FIG. 1 by external operation, the clutch arm 25 rotates about the shaft 18 and the holder 10 slides in the axial direction. In the clutch portion 13 on the left side of FIG. 1, when the holder 10 slides outward, the protrusion 12 pushes the steel ball 7 into the recess 8 of the power take-off shaft 3, and the rotation of the sprocket wheel 5 is controlled from the power take-off shaft 3. This is the state in which the signal is being transmitted to axis 2. Clutch part 14 on the right side of Fig. 1
In this case, the holder 10 slides inward to release the steel ball 7, and the steel ball 7 jumps out from the recess 8 due to centrifugal force, thus placing the sprocket wheel 5 and the power take-off shaft 3 in a power cutoff state. Maintained.

Therefore, the shaft 18 connected to the clutch arm 25 needs to be held at both ends,
During assembly, the fitting shaft 20 of the pair of bearing members 21
is fitted into the fitting hole 16 of the fitting support 15. At this time, the protrusion 22 and the groove 23a are engaged. Then,
Select a position where no obstruction exists on the extension of the axis of the bearing part 19, rotate one bearing member 21 around the axis of the fitting holder 15, and rotate the shaft 1 at this position.
8 is fitted into the bearing portion 19 of one of the bearing members 21. Next, the bearing portion 1 of the pair of bearing members 21
9 are coaxially positioned, and the shaft 18 is slid to fit the other end into the bearing portion 19 of the other bearing member 21. At this time, the shaft 18 is slid in the front and back direction, but the amount of movement is small. Next, the retaining ring 26 is fixed to the shaft 18. Therefore, unlike the conventional method in which the shaft 18 is fitted to two bearing members 21 at the same time, it is not necessary to expand the transmission case 1 in the front and back direction just to make room for the assembly space. It is possible to make it compact. Thereby, it is possible to reduce the amount of uncultivated land that occurs in the transmission case 1. The soil also flows well during tilling.

Note that in the assembled state, the protrusion 22 is in the groove 23a.
The bearing member 21 can be prevented from falling off and facing the stepped portion 23 .

Since this device is constructed as described above, one end of the shaft connected to the clutch arm is fitted into one of the bearing members from any direction, and then the bearing member holding one end of the shaft is turned and the shaft is slightly slid. By doing so, the other end of the shaft can be fitted to the other bearing member, and therefore there is no need to slide the shaft significantly on the same axis, and the transmission case can be made more compact. This has the effect of preventing the occurrence of uncultivated land under the cultivation case and improving the flow of soil during tilling.

[Brief explanation of the drawing]

The drawing shows one embodiment of this invention.
The figure is a vertical front view, Figure 2 is a vertical side view, Figure 3 is a perspective view showing the relationship between the bearing member and the fitting holder, and Figure 4 is the fitted state of the bearing member and the fitting holder. FIG. 1...Mission case, 3...Power transmission shaft,
13, 14...clutch portion, 15...fitting support, 16...fitting hole, 17...expanded hole, 18...
Shaft, 19... Bearing portion, 20... Fitting shaft, 2
1...Bearing member, 22...Protrusion, 23...Step part,
23a...Groove, 25...Clutch arm.

Claims (1)

[Scope of utility model registration request] A transmission case made of steel plate that holds the power transmission shaft and the clutch part and is divided into left and right halves, a fitting hole fixed to the inner surface of these transmission cases and having a groove along the axial direction, and a fixed side. a fitting support body having a stepped portion formed by an enlarged hole located at the fitting support body; and a fitting support member having a step portion formed by an enlarged hole located at A bearing member comprising a fitting shaft having an engaging protrusion formed at its tip and a bearing portion perpendicular to the fitting shaft, and both ends of the bearing member are slidably and rotatably held in the bearing portion of the bearing member. 1. A side clutch for a mobile agricultural machine, comprising a shaft and a clutch arm connected to the shaft.