JPH0217251A - Installing device of transmission case - Google Patents

Abstract

PURPOSE:To form a simple structure in a transmission or the like of an agricultural machine such as a seedling planting machine, etc. by providing an engagement recessed part on the outer surface of a bushing, deviding a transmission case in two-pieces along the direction of a rotary shaft, and while forming integrally an engagement projection which engages with the engagement recessed part so as to whirl-stop on the inner surface of the transmission case. CONSTITUTION:An engagement recessed part 3 is provided on the outer surface of a bushing 2 which bears a rotary shaft 1. A transmission case 5 having an internal transmission mechanism 4 associated with the rotary shaft 1 is formed in two-pieces devided shape along the direction of the rotary shaft 1, and while an engagement projecting which engages with the engagement recessed part 3 is formed integrally on the inner surface of the transmission case 5. The transmission case 5 is formed integrally by engaging the engagement projecting 6 with the engagement recessed part 3 and fastening a bolt 26. The transmission case 5 is whirl-stopped because that the bushing 2 is fixed on the machine, the stabilized condition can be maintained during the transmitting. Consequently, the installation is facilitated because of a simple structure.

Description

[Detailed Description of the Invention] Industrial Application Field This invention relates to a transmission case mounting device, and is suitable for tail wheel adjustment devices of tillers, combine harvesters, seedling planting machines, etc. that require connection between transmission cases. It can also be used in transmission devices for agricultural machinery, etc.

PRIOR ART AND PROBLEMS TO BE SOLVED BY THE INVENTION A tail wheel adjustment device for a power tiller that adjusts the vertical movement of the tail wheel by transmitting gears to a telescoping shaft through rotational operation of a handle. A transmission case that rotatably supports the upper end of the shaft is divided into two parts along the direction of the telescopic shaft, an engaging recess is formed in the two halves, and the engaging recess is inserted into the telescopic shaft. The upper end is fitted into an engaging protrusion protruding from the outer circumferential surface of the bearing cylinder that receives the bearing, thereby preventing one rotation and the removal (Japanese Utility Model Publication No. 54-36220).
However, the structure in which the engaging protrusion is provided on the outer circumferential surface of the bearing cylinder is complicated.

Means for Solving the Problems This invention provides an engagement recess (3) on the outer circumferential surface of a bearing sleeve (2) that supports a rotating shaft (1), and a transmission mechanism 4 that interlocks with this rotating shaft (11). The internal transmission case (5) is formed into two halves along the direction of the rotation axis +11, and an engagement projection (3) is provided on the inner circumferential surface of the transmission case (5) that engages with the engagement recess (3) to prevent rotation. The operation and effect of the invention is that the transmission case mounting device is configured by integrally molding the transmission case (5) with the transmission mechanism (4) in the transmission case (5) and the rotating shaft (1) in the bearing sleeve. However, these transmission cases (5
) and the bearing sleeve (2) are the engagement protrusion (6) and the engagement recess (3).
Since the bearing tube T23 is normally fixed to the aircraft body, a stable state can be maintained even when the transmission is performed.

These engagement protrusions (6) integrally molded on the inner circumferential surface of the transmission case (5) are structured so that the transmission case (51) is formed on the split surface of the two side rods along the axial direction. is simple and easy, and the structure of the engagement recess of the bearing tube (21) that receives the fitting and tightening of the transmission case (5) is also easy, so the transmission Case(
5) Preventing the bearing tube (2) from rotating and preventing it from coming out in the axial direction can be achieved with a simple structure and assembly.

Embodiment In the example shown in Figure 1, (7) is a mounting frame for attaching the tail wheel of the tiller, and +81 is a mounting tube that is attached vertically at the rear end of this mounting frame (7). ) Insert the bearing cylinder (2) into the inside and secure it by tightening the bolt (9) from the outside. A one-rotation shaft (
1) is rotatably provided on this bearing metal fl[l.

(II) is the lower side of the bearing metal (111) and the rotating shaft (111).
It is a thrust bearing between the fixed bearing edge 0 and 1, and the lower part of the rotating shaft (1) has a screw (1j), and the tail wheel vibrator (to which the lower tail wheel is attached) has a screw at the upper end. (Screw it into +9.

The configuration is such that the tail wheel pipe (14) is moved up and down by the rotation of the rotating shaft (1).

The transmission case (5) includes the rotating shaft (1) and a handle (19) which is supported by a bearing so as to protrude rearward at the upper part.
It is formed into a pair of left and right split shapes with the axial surface as the split surface, and by tightening them together, a transmission case can be constructed. The transmission mechanism (41) is formed by meshing a bevel gear (1) 1 provided at the upper end of the rotating shaft (1) with a bevel gear [Fj] provided at the tip of the handle shaft surface, and by turning the handle flG, the rotating shaft ( 1) can be rotated in the forward and reverse directions.When attaching the bevel gear (Ill) to the rotating shaft (1), as shown in Figure 3,
A spring pin (to) is inserted into the bottom surface of the bevel gear +11, and a pin groove is provided on the bottom surface of the bevel gear +11 to fit with this spring pin 4 and engage with each other in the rotational direction. 1), and rotation is transmitted within one body by the engagement of these spring pins (to) and the pin groove 211. Also, handle shaft [171 and bevel gear IF]
Similarly, rotation is transmitted between the spring (2) and the pin groove (to) in an integral manner.

The engaging protrusion (6) is located at the lower end of the transmission case (5) on one side.

It is formed opposite to the fitting part for the bearing cylinder (2), and is made to appropriately protrude toward the center from the inner circumferential surface. An engagement recess (3) into which the engagement protrusion (6) fits is formed across the bearing tube (2) and the bearing metal +11. Transmission case (5)
A bolt hole e4 is provided in the part facing the bearing tube (2), and the pair of left and right transmission cases (5) are overlapped with the backing 4 interposed between them, and a bolt (to) is inserted into each pole 84Q layer. then tighten and secure with the nut (5).

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, with FIG. 1 being a side sectional view, and FIGS. 2 and 3 being partial plan sectional views thereof. In the figure, (1) is the rotating shaft, (2) is the bearing sleeve, (3) is the engagement recess, (4) is the transmission mechanism, (5) is the transmission case, (
6) indicates an engaging protrusion.

Claims (1)

[Claims] A transmission case (5) is provided with an engagement recess (3) on the outer circumferential surface of a bearing sleeve (2) that bears a rotating shaft (1), and has a transmission mechanism (4) internal therein that interlocks with the rotating shaft (1). This rotation axis (
An engagement protrusion (6) formed in two halves along the direction of 1) and engaged with the engagement recess (3) on the inner circumferential surface to prevent rotation.
) is an integrally molded transmission case mounting device.