JPS608642Y2 - Transmission device of work equipment - Google Patents

Description

[Detailed description of the invention] The present invention relates to a transmission device for a working machine towed by a tractor, such as a rotary device, which can extract power in the coaxial direction and the cross direction with the input shaft, and facilitates assembly and disassembly. The purpose is to make it possible to

As a conventional device of this type, Utility Model Application No. 52-136018
There is something disclosed in the publication No.

In this conventional device, a bevel pinion is provided on one input shaft, a bevel gear that meshes with the bevel pinion is provided on a transmission shaft perpendicular to the input shaft, and a rotating shaft is provided that is coaxial with and facing the input shaft to input A technique has been disclosed in which the gear case is rotatable integrally with the gear case, and both rotating shafts are made to protrude from the front and rear surfaces of the gear case, respectively.

In this conventional device, the bevel gear is supported by the gear case and is difficult to assemble, and the two rotating shafts cannot be attached to the gear case with only independent bearing cases (input shafts with bevel pinions). is also supported by the gear case, so it is not possible to assemble or disassemble each part individually.There is only one bevel pinion, and the other rotating shaft does not rotate in the opposite direction. To set it to , the bevel gear must be placed on the opposite side of the rotating shaft, but the rotating shaft becomes an obstacle,
The structure is such that it cannot be set in such a rotational direction.

The present invention solves all of the problems of conventional devices, and its feature is that the bearing cases are fixed to the openings formed at the front and rear of the gear case of the working machine, and both bearings A pair of bevel pinions are formed facing each other on a rotating shaft rotatably supported by the case, and an intermediate bevel gear meshing with both bevel pinions is disposed inside the gear case, and the intermediate bevel gear is configured to transmit power in a direction perpendicular to the rotating shaft. In a transmission device for a working machine in which the shaft is fitted with a spline, the rotating shaft is formed of two shafts each independently supported by each bearing case and provided with each bevel pinion, and the rotating shaft is formed of two shafts each having a bevel pinion installed in one of the bearing cases. A bearing part is formed concentrically with the intermediate bevel gear, and a bearing that fits into the boss part of the intermediate bevel gear is fitted and positioned in this bearing part, and the transmission shaft is connected to two rotating shafts from the side of the gear case. The point is that it passes between the shafts and is fitted into the intermediate bevel gear.

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 illustrates a rotary device 1 equipped with a pest control device 2. As shown in FIG.

The rotary machine 1 includes a rotary machine frame 3, a rotary tiller 4, a rotary cover 5, and the like.

The rotary machine frame 3 has a gear case 6 located at the upper center,
The rotary machine frame 3 has a pair of left and right support arms 7 attached to both sides of the gear case 6, and a transmission case 8 and a side frame 9 provided below from the outer end of each support arm 7. It is attached to the rear of the tractor via a three-point linkage mechanism so that it can be moved up and down.

The rotary tiller 4 includes a pawl shaft 10 supported between the transmission case 8 and the lower end of the side frame 9, and a large number of tilling pawls 11 implanted in the pawl shaft 10.

The pest control device 2 includes a chemical tank 13 mounted on the support arm 7 via a mounting plate 12, a liquid feed pump 14 mounted on the mounting plate 12, a spray pipe 15 horizontally suspended at the rear upper position of the rotary cover 5, etc. The spray pipe 15 is supported by the rotary machine frame 3 via a mounting frame 16.

The liquid feed pump 14 is driven by a rotating shaft 37 protruding from the gear case 6 via a winding transmission mechanism 18, as will be described later.

The rotary device 1 is equipped with a pest control machine 2, so that it can cultivate the field and spray chemical solutions at the same time, and the power of the pest control machine 2 is taken out from a gear case 6.

FIG. 2 shows a transmission device 17 configured in the center of the gear case 6.
, and the front and rear surfaces of the gear case 6 have openings 20.
21 is formed, and the bearing case 5 is inserted into this opening 20.21.
9.60 is inserted and secured via the bolt 22.

Each bearing case 59.60 has two rotating shafts 19.37.
It is rotatably supported via individual bearings 55, 56, 57, 58, and both rotating shafts 19, 37 are coaxial and face each other at a distance, and the opposing outer ends are respectively connected to bearing cases 59, 59, 58, 57, 58, and 57, 58, respectively.
60, and a bevel pinion 53.5 is located at the opposite inner end.
4 are provided in one piece.

A bearing portion 23 protruding into the gear case 6 is integrally formed in one of the bearing cases 59, and an intermediate bevel gear 35 is rotatably supported by the bearing portion 23 via a bearing 24.

The bearing 24 is fitted into the bearing portion 23 and positioned by a snap ring in a direction in which it receives a thrust load from the intermediate bevel gear 35.

The intermediate bevel gear 35 is connected to the two bevel pinions 5.
3.54, the boss part 25 is cylindrical and fitted into the bearing 24, a hole spline 26 is formed on the inner periphery of the boss part 25, and the end of the transmission shaft 34 is connected with the spline. There is.

The transmission shaft 34 is inserted from one side of the gear case 6 and connected to the intermediate bevel gear 35 so that it can rotate integrally with the transmission shaft 34. The transmission shaft 34 is inserted into the left support arm 7, and receives driving force from either one of the rotation shafts 19 and 37. , the pawl shaft 10 via the transmission case 8
Communicate to.

This transmission shaft 34 is perpendicular to the axis of the rotation shaft 19.37.

In the embodiment, the rotating shaft 19 serves as the input shaft of the rotary device 1, and is connected to the rear PTO shaft of the tractor via a universal joint, and the rotating shaft 37 receives power that rotates at the same speed and in the opposite direction to the input shaft. Liquid feed pump 1 serves as the extraction shaft
It is driving 4.

The transmission device 17 is assembled by attaching the bearing 5 to the bearing case 59.
After assembling the rotating shaft 19 through the shafts 5 and 56 and arranging the boss portion 25 of the intermediate bevel gear 35 within the bearing portion 23, the bearing 24 is fitted between the boss portion 25 and the bearing portion 23, and the It is inserted through the opening 20 as a unit and fixed to the gear case 6.

Thereafter, the rotating shaft 37 is assembled to the bearing case 60 via the bearings 57, 5B, and this is inserted into the opening 21 from the rear of the gear case 6 and fixed.

Then, the transmission shaft 34 is inserted from the side of the gear case 6, and its end is passed between the rotating shafts 19 and 37 and spline-coupled to the boss portion 25 of the intermediate bevel gear 35.

As is clear from FIG. 2, the rotating shaft 19.37 has substantially equal beveled pinions 53 and 54, and their outer end diameters are also formed substantially equal.If the opening 21 is made larger, the bearing portion 23. can also be provided in the bearing case 60.

According to the present invention described in detail above, the rotating shaft is formed of two shafts that are independently supported by each bearing case and provided with each bevel pinion, and one of the bearing cases has an intermediate bevel gear and a concentric shaft. A shaped bearing part is formed, and a bearing fitted to the boss part of the intermediate bevel gear is fitted and positioned in this bearing part, and the transmission shaft passes from the side of the gear case between the two rotating shafts and connects to the intermediate bevel gear Since the rotary shaft with the bevel pinion, the intermediate bevel gear, and the bearing that supports it can be pre-assembled in one bearing case, the rotary shaft can also be pre-assembled in the other bearing case. Since the transmission shaft can be assembled after these have been assembled into the gear case, assembly and disassembly of parts and the entire device can be extremely easily done.
In addition, since one of the two rotating shafts rotates in the opposite direction to the other, it can be used for a variety of purposes, for example as a drive shaft for other equipment, and the rotation direction of the transmission shaft is determined and the position of the intermediate bevel gear is limited. This allows it to be used when the transmission shaft must be orthogonal across the axis of the rotating shaft, and even in that case it is possible to provide a shaft that is reversed relative to the shaft that serves as its input shaft.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention, and FIG. 1 is a rear view;
FIG. 2 is a sectional view taken along the line ■--■ in FIG. 1... Rotary device, 14... Liquid feed pump, 17... Transmission device, 19... Rotating shaft, 20.21... Opening, 23...
・Bearing part, 34...Transmission shaft, 35...
Intermediate bevel gear, 37...rotating shaft.

Claims (1)

[Scope of Claim for Utility Model Registration] Bearing cases are fixed to openings formed at the front and rear of the gear case of a working machine, and a pair of bevel pinions are mounted facing each other on a rotating shaft rotatably supported by both bearing cases. In a transmission device for a work machine, an intermediate bevel gear that meshes with both bevel pinions is disposed in a gear case, and a transmission shaft in a direction perpendicular to the rotating shaft is splined into the intermediate bevel gear, the rotating shaft is connected to each bearing. It is formed of two shafts that are independently supported by a case and are each provided with a bevel pinion, and one of the bearing cases is formed with a bearing part that is concentric with the intermediate bevel gear, and the intermediate bevel gear is mounted in this bearing part. A bearing fitted into a boss portion of the working machine is fitted and positioned, and the transmission shaft is fitted into an intermediate bevel gear from a side of a gear case passing between two rotating shafts. Transmission device.