JPS6216528Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention is designed to connect the output shaft of the machine and the input of the work machine in a walk-behind work machine, such as a walk-behind tiller used for cultivating under trees in orchards. It is used to interlock the shaft, and in detail, the first rotating body for transmission can be fitted and interlocked with the output shaft of the transmission case on the machine side, and the input shaft of the transmission case on the work machine side can be fitted and interlocked. A case body made of a thin plate material that supports the second rotating body for transmission is connected to the first and second rotating bodies.
A first divided body fixed to the machine side along a plane intersecting the rotational axis of the rotating body is composed of a second divided body that is detachable from the first divided body, and The first and second parts extend between the divided body and the second divided body.
The present invention relates to an intermediate transmission case in which an intermediate transmission rotating body for relaying and interlocking the rotating bodies is supported.

The above-mentioned intermediate transmission case allows for easy internal maintenance and inspection because the second divided body can be attached and detached independently.However, as a structure for attaching the intermediate transmission case to the machine side frame, the following conventional structures have been used: It was hot.
That is, a cylindrical body is fixed to the intermediate part of the case body, separate from the intermediate transmission shaft, and oriented parallel to the axis of the intermediate transmission shaft, with both ends opening on both sides of the case body. The structure was such that the case was fixed to the machine side frame by inserting a case fixing bolt into the internal through hole.

In this case, it was necessary to provide a cylindrical body exclusively for attaching the case, and the overall structure of the case was complicated, which was disadvantageous in terms of manufacturing and cost.

In view of the above circumstances, the present invention aims to simplify the mounting structure by effectively utilizing the support shaft of the intermediate transmission rotating body.

The characteristic configuration of the intermediate transmission case according to the present invention, which has been made to achieve the above object, is that a cylindrical shaft is fixed to the first divided body by penetrating its inner and outer surfaces, and the intermediate transmission case is attached to a protrusion on the inner side of the cylindrical shaft. At the same time, the projecting edge of the inner surface of the cylinder shaft is brought into contact with the inner peripheral edge of the hole formed in the second divided body, and a case fixing bolt is inserted into the cylinder from the outer surface of the second divided body. The main feature is that it is configured so that it can be inserted into the internal through-hole of the shaft and screwed onto the fixing member on the machine side.

The effects of the present invention having such a characteristic configuration are as follows.

In other words, by using the shaft that supports the intermediate transmission rotating body as a cylindrical shaft and using its internal through-hole as the insertion hole for the case fixing bolt, the dedicated cylindrical body that was conventionally required can be omitted. By reducing the number of parts, the structure can be simplified and the case body can be manufactured easily, making it advantageous in terms of manufacturing and cost.

Instead of connecting the first and second divided bodies and the cylindrical shaft together by screwing the case fixing bolt to the fixing member on the machine side, one end of the cylindrical shaft is fixed to the machine side. The tube shaft is fixed to the first divided body, and the other end edge is placed against the inner surface of the detachable second divided body.
Although it is also used as a spacer for regulating the relative position of the second divided body, the intermediate transmission rotating body can be assembled independently to the first divided body, making the assembly work easier.

Next, an embodiment of the configuration of the present invention will be described based on the drawings.

As shown in FIGS. 1 and 2, the machine side transmission case has left and right propulsion wheels 1, 1 connected to flanges 2a, 2b of left and right split case parts 2A, 2B by a plurality of bolts 3. 2, an engine 4 is mounted on a mounting base 5 extending from the transmission case 2, a belt 6 is provided for transmitting the engine output to the transmission case 2, and a control handle 7 is mounted on the transmission case 2. The tilling device is attached to the lower end of the work machine side transmission case 8, which is split into left and right halves and houses the transmission chain, and which constitutes the machine and houses the transmission chain. 2 as described later, and the support frame 11 of the tail wheel 10 for setting the plowing depth is attached to the tilling device, and furthermore, the chain 18 for transmitting the output of the transmission case 2 to the working machine side transmission case 8 is housed. An intermediate transmission case 13 is provided to constitute a walking type cultivator.

The detailed structure of the intermediate transmission case 13 is as follows.
The first rotary body 15 for transmission consists of a chain sprocket that can be spline-fitted and interlocked with the output shaft 14 of the transmission case 2 on the machine side, and the transmission case 8 on the work machine side.
A case body 3 made of a thin plate material that supports a second rotating body 17 for transmission consisting of a chain sprocket that can be spline-fitted and interlocked with the input shaft 16 of the The first divided body A is fixed to the machine side along the plane orthogonal to the core.
and a second divided body B that is detachable from the first divided body A, and the first and second rotating bodies 15, 1
Intermediate transmission rotating body 19 for relaying and interlocking 7.
At the same time, a portion of the case body 13 corresponding to each of the output shaft 14 and the input shaft 16 includes a
The transmission case 2 and the work machine side transmission case 8
Bosses 13a, 13a are fixedly fitted into the protrusions 2c, 8a to position the case body 13.

A cylindrical shaft 20 that supports an intermediate transmission rotating body 19 consisting of a double sprocket for relaying and interlocking the first and second rotating bodies 15 and 17 via chains 18 and 18 in an intermediate portion within the case body 13. is fixed, and the internal through hole 20a of the cylindrical shaft 20 is also used as the insertion hole for the case fixing knob bolt 21. That is, the cylindrical shaft 20 is fixed to the first divided body A by penetrating its inner and outer surfaces, and the intermediate transmission rotating body 19 is supported on the inner protrusion of the cylindrical shaft 20. The inner protruding edge is brought into contact with the inner circumferential edge of the hole formed in the second divided body B, and the case fixing bolt 21 is inserted into the internal through hole 20a of the cylinder shaft 20 from the outer surface of the second divided body B. It is configured so that it can be screwed onto a fixing member C connected to the machine side via a bolt 3.

The fitting and interlocking of the output shaft 14 of the transmission case 2 of the first and second rotary bodies 15 and 17 and the input shaft 16 of the work machine side transmission case 8 may be in any combination, and the case may vary depending on the application. The mounting position of the main body 13 can be changed. In addition, symbols are written in the scope of claims for utility model registration for convenience of comparison with the drawings.
Accordingly, the present invention is not limited to the structure shown in the accompanying drawings.

[Brief explanation of drawings]

The drawings show an embodiment of the intermediate transmission case according to the present invention, and FIG. 1 is an overall side view of the walk-behind cultivator, and FIG.
The figure is a cross-sectional plan view showing the attached state. 2... Machine side transmission case, 8... Working machine side transmission case, 13... Case body, 14... Output shaft, 15... First rotating body for transmission, 16... Input shaft, 17... Second rotating body for transmission, 19... Intermediate rotating body for transmission, 20... Cylindrical shaft, 20a... Through hole,
A...first divided body, B...second divided body, C...fixing member, 21...case fixing bolt.

Claims (1)

[Scope of utility model registration request] A first rotating body 15 for transmission that can be fitted and interlocked with the output shaft 14 of the transmission case 2 on the machine side and a second rotating body 17 for transmission that can be fitted and interlocked with the input shaft 16 of the transmission case 8 on the work machine side. The supporting case body 13 made of thin plate material is fixed to the machine side along a plane intersecting the rotation axes of the first and second rotating bodies 15 and 17, and the first divided body A is fixed to the machine side. A second divided body B is detachably attached to the first divided body A, and the first and second divided bodies
In an intermediate transmission case in which an intermediate transmission rotating body 19 for relaying and interlocking the rotating bodies 15 and 17 is supported, a cylindrical shaft 20 is fixed to the first divided body A by penetrating its inner and outer surfaces. The intermediate transmission rotating body 19 is supported on the inner protrusion of the shaft 20, and the inner protruding edge of the cylindrical shaft 20 is supported on the second
Abut against the inner periphery of the hole formed in the divided body B,
The case fixing bolt 21 is inserted into the internal through hole 20a of the cylindrical shaft 20 from the outer surface side of the second divided body B, and is configured to be screwed onto the fixing member C on the machine side. intermediate transmission case.